There is increasing evidence that pituitary hormones traditionally thought of as ‘pure’ regulators of single physiological processes affect multiple bodily systems, either directly or via actions on brain receptors (Zaidi et al., 2018; Abe et al., 2003). We established, for the first time, a direct action of thyroid-stimulating hormone (TSH) on bone and found that TSH receptor (TSHR) haploinsufficiency causes profound bone loss in mice (Abe et al., 2003). We also found that follicle-stimulating hormone (FSH), hitherto thought to solely regulate gonadal function, displayed direct effects on the skeleton to cause bone loss (Sun et al., 2006), and on fat cells, to cause adipogenesis and body fat accumulation (Liu et al., 2017). Likewise, we showed that hormones from the posterior pituitary, namely, oxytocin and vasopressin, displayed direct, but opposing, skeletal actions—effects that may relate to the pathogenesis of bone loss in pregnancy and lactation, and in chronic hyponatremia, respectively (Sun et al., 2019; Sun et al., 2016; Tamma et al., 2009; Tamma et al., 2013). To add to this complexity, and in addition to the poorly recognized ubiquity of pituitary hormone receptors, the ligands themselves, or their variants, are expressed widely. We find the expression of a TSHβ variant (TSHβv) in bone marrow macrophages, while oxytocin is expressed by both osteoblasts and osteoclasts (Colaianni et al., 2011; Colaianni et al., 2012; Baliram et al., 2013; Baliram et al., 2016). These studies have together shifted the paradigm from established unitary functions of pituitary hormones to an evolving array of yet unrecognized roles of physiological and pathophysiological importance.

There is a compelling body of literature to support the expression of oxytocin receptors in various brain regions, and their function in regulating peripheral actions, such as social behavior and satiety (Sun et al., 2019; Bale et al., 2001). However, there is relatively scant information on the expression and, importantly, function of the anterior pituitary glycoprotein hormone family of receptors, namely, FSHR, TSHR, and luteinizing hormone/human chorionic gonadotropin receptor (LHCGR). Discrete sites of the rat, mouse, and human brain express receptors for these hormones, with several studies pointing to their relationship to neural functions, such as cognition, learning, neuronal plasticity, and sensory perception, as well as to neuropsychiatric disorders, including affective disorders and neurodegeneration (Crisanti et al., 2001; Emanuele et al., 1985; Lei et al., 1993; Luan et al., 2020; Bi et al., 2020; Blair et al., 2019; Apaja et al., 2004; Naicker and Naidoo, 2018; Table 1). In the light of such discoveries, the link between the stimulation of these receptors in the brain and the regulation of peripheral physiological processes needs further investigation.

Here, we use RNAscope—a cutting-edge technology that detects single RNA transcripts—to create the most comprehensive atlas of glycoprotein hormone receptors in mouse brain. This compendium of glycoprotein hormone receptors in concrete brain regions and subregions at a single-transcript level should allow investigators to study both peripheral and central effects of the activation of individual receptors in health and disease. Our identification of brain nuclei with the highest density for each receptor should also create a new way forward in understanding the functional engagement of receptor-bearing nuclei within a large-scale functional network.

Very little is known about the function(s) of anterior pituitary hormone receptors in the brain, except for isolated studies showing a relationship with cognition and affect (Table 1). We therefore used RNAscope to map the expression of Tshr, Lhcgr, and Fshr in the mouse brain; immunofluorescence and qPCR to provide confirmatory evidence for Tshr and Fshr expression; and ViewRNA and qPCR to examine for FSHR expression in AD-vulnerable regions of the human brain. RNAscope, which allows the detection of single transcripts, uses ~20 pairs of transcript-specific double Z-probes to hybridize 10-µm-thick whole-brain sections. Preamplifiers first hybridize to the ~28-bp binding site formed by each double Z-probe; amplifiers then bind to the multiple binding sites on each preamplifier; and finally, labeled probes containing a fluorescent molecule bind to multiple sites of each amplifier. RNAscope data was quantified on sections from coded mice. Each section was viewed and analyzed using CaseViewer 2.4 (3DHISTECH, Budapest, Hungary) or QuPath v.0.2.3 (University of Edinburgh, UK). The Atlas for the Mouse Brain in Stereotaxic Coordinates (Paxinos and Franklin, 2007) was used to identify every nucleus or subnucleus in which we manually counted Tshr, Lhcgr, or Fshr transcripts in every tenth section using a tag feature. Repeat counting of the same section agreed within <2%. Receptor density was calculated by dividing transcript count by the total area (µm², ImageJ) of each region, nucleus or subnucleus. Photomicrographs were prepared using Photoshop CS5.1 (Adobe) only to adjust brightness, contrast, and sharpness, remove artifacts (i.e., obscuring bubbles), and make composite plates.

Tshr was detected bilaterally in 173 brain nuclei and subnuclei, in the following descending order of transcript densities: ventricular region, olfactory bulb, forebrain, hypothalamus, medulla, cerebellum, midbrain and pons, cerebral cortex, hippocampus, and thalamus (Figure 1A, Figure 1—source data 1). Importantly, thyroid glands from Tshr^–/– mice did not show a signal, proving probe specificity (Figure 1B). Tshr expression in pooled brain samples was confirmed by qPCR (Figure 1C, Figure 1—source data 2). The hypothalamus and hippocampus expressed Tshr, with hypothalamic expression being considerably higher (p<0.01) in females than in males. Furthermore, within other regions of the brain, highest Tshr densities were as follows: ependymal layer of the third ventricle (slightly higher than the thyroid follicular cells); VTT in the olfactory bulb; HDB in the forebrain; MTu in the hypothalamus; SoIV in the medulla; PFI in the cerebellum; LDTg in midbrain and pons; DP in the cerebral cortex; DG in hippocampus; and PPT in the thalamus (Figure 1D, Figure 1—source data 1; see Appendix 1 for nomenclature). Raw transcript counts in each region and representative micrographs are shown in Figure 1—figure supplement 1 (Figure 1—figure supplement 1—source data 1) and Figure 1—figure supplement 2, respectively.

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Tshr density in brain regions, nuclei, and subnuclei.

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Tshr mRNA expression levels in mouse tissues (qPCR).

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For purposes of replicability, we employed a complementary approach to study brain Tshr expression—the Tshr-deficient mouse—in which exon 1 of the Tshr gene is replaced by a Gfp cassette. This reporter strategy allows for the in vivo display of Tshr locations using GFP immunoreactivity (GFP-ir) as a surrogate for Tshr expression (Abe et al., 2003). Of note is that the Tshr^+/– (haploinsufficient) mouse has one Tshr allele intact with normal thyroid function but expresses GFP in lieu of one lost allele. In contrast, the Tshr^+/+ mouse does not express GFP-ir because both Tshr copies are intact and are therefore our negative control.

Consistent with our RNAscope finding, profound GFP-ir was noted in the ependymal region of the third ventricle, mostly in NeuN-negative cells, but with some neuronal localization (Figure 1E). The SVZ of the lateral ventricles, and the SI, and dorsal and ventral BNST of the forebrain also showed GFP-ir, but immunoreactivity was much lower than the ependymal layer of the third ventricle (Figure 1F). In all, while there was overall concordance between the two methodologies for high Tshr-expressing areas, GFP-ir was not detected in a number of Tshr-positive regions. This latter discrepancy most likely reflects the grossly lower sensitivity of immunohistochemical detection.

There is evidence that high LH levels in postmenopausal women correlate with a higher incidence of Alzheimer’s disease (AD) (Henderson et al., 1994; Rocca et al., 2007); LHβ transgenic mice are cognitively impaired Casadesus et al., 2007; LH receptors (LHCGR) are present in the hippocampus (Rao, 2017; Liu et al., 2007); and hCG induces cognitive deficits in rodents (Berry et al., 2008; Barron et al., 2010). Thus, we mapped Lhcgr in mouse brain to document expression in 401 brain nuclei and subnuclei. Probe specificity was established by a positive signal in testicular Leydig cells, and with an absent signal in juxtaposed Sertoli cells (Figure 2A). Notably similar to Tshr transcripts, the ventricular regions displayed the highest transcript density (Figure 2B, Figure 2—source data 1). Among the brain divisions, the densities were as follows: OV in the ventricular region; SFO in the forebrain; PFI in the cerebellum; MiA in the olfactory bulb; SCO in the thalamus; PMD in the hypothalamus; MVPO in the medulla; DT in midbrain and pons; GrDG in the hippocampus; and SL in the cerebral cortex (Figure 2C, Figure 2—source data 1). Raw transcript counts in each region and representative micrographs are shown in Figure 2—figure supplement 1 (Figure 1—figure supplement 1—source data 1) and Figure 2—figure supplement 2, respectively.

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Lhcgr density in brain regions, nuclei, and subnuclei.

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We recently reported the expression of FSHR in mouse, rat, and human brains, particularly in AD-vulnerable regions, including hippocampus and cortex (Xiong et al., 2022). We also found that FSH exacerbated AD-like neuropathology and cognitive decline in 3xTg, APP/PS1, and APP-KI mice, while the inhibition of FSH action rescued this phenotype. Most notably, shRNA-mediated knockdown of the Fshr in the hippocampus prevented the onset of AD-like features (Xiong et al., 2022). Here, using RNAscope, we report the expression of Fshr at the single-transcript resolution in 353 brain nuclei and subnuclei—and suggest that FSHR in the brain may have roles beyond cognition. Probe specificity was established by a positive signal in testicular Sertoli cells, and an absent signal in juxtaposed Leydig cells and in the testes of Fshr^–/– mice—as negative controls (Figure 3A). Immunofluorescence confirmed the expression of FSHR in NeuN-positive neurons, but not in GFAP-positive glial cells or IBA1-positive microglia (Figure 3B).

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Fshr density in brain regions, nuclei and subnuclei.

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Fshr transcript density was highest in the ventricular region, followed, in descending order, by the cerebellum, olfactory bulb, hippocampus, cerebral cortex, medulla, midbrain and pons, forebrain, thalamus, and hypothalamus (Figure 3C, Figure 3—source data 1). Within each region, respectively, the highest transcript densities were as follows: ependymal layer of the third ventricle (slightly higher than the testicular Sertoli cells); PFI in the cerebellum; GrA in the olfactory bulb; GrDG in the hippocampus; AIV in the cerebral cortex; RMg in the medulla; MHb in the thalamus; IPDL in midbrain and pons; aci in the forebrain; and ArcL in the hypothalamus (Figure 3D, Figure 3—source data 1). Raw transcript counts in each region and representative micrographs are shown in Figure 3—figure supplement 1 (Figure 3—figure supplement 1—source data 1) and Figure 3—figure supplement 2, respectively.

We used ViewRNA to examine the expression of FSHR transcripts in specific regions of the human brain (Figure 4A). Expression was noted in neuronal cells co-expressing the noncoding RNA MALAT1 in the GrDG—consistent with the RNAscope data in mouse brain—and in the parahippocampal cortex. This latter data is consistent with FSHR expression in a population of excitatory glutamatergic neurons noted in human brain by 10× single-cell RNA-seq (Allen Brain Atlas). Affymetrix microarray analysis confirmed FSHR expression in the frontal, cingulate, temporal, parietal, and occipital subregions of human cortex in postmortem normal and AD brains (Figure 4B, Figure 4—source data 1). Interestingly, FSHR expression trended to be higher in the frontal cortex of the AD brains compared to that of unaffected brains (p=0.060). In all, the data suggest that, beyond a primary role in regulating cognition, brain FSHR may have a wider role in the central regulation.

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FSHR mRNA expression in the frontal, cingulate, temporal, parietal, and occipital subregions of human cortex in postmortem normal and Alzheimer’s disease (AD) brains.

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The past decade has witnessed the unraveling of nontraditional physiological actions of anterior pituitary glycoprotein hormones, and hence, the unmasking of functional receptors in bone, fat, brain, and immune cells, among other organs (Zaidi et al., 2018; Sun et al., 2006; Liu et al., 2017; Liu et al., 2015; Williams, 2011; Sun et al., 2020; Fields and Shemesh, 2004). We report here for the first time that Tshr, Lhcgr, and Fshr are expressed in multiple brain regions. The data provide new insights into the distributed central neural network of anterior pituitary hormone receptors, particularly in relation to their role in regulating the somatic tissue function. Specifically, we find a surprising and striking overlap in central neural distribution of the three receptors—with highest transcript densities in the ventricular regions. Furthermore, at least for the TSHR and FSHR, expression levels in ependymal layer of the third ventricle was similar to that of the thyroid follicular cells and testicular Sertoli cells, respectively. Albeit intriguing, this may suggest a primary role for these receptors in central neural regulation.

Among 173 Tshr-positive brain regions, subregions, and nuclei, the ependymal layer of the third ventricle displayed the highest Tshr transcript number and density. This region is juxtaposed to the anterior pituitary that produces TSH in response to hypothalamic TRH. Furthermore, TSH has been reported to be expressed in the hypothalamus (DeVito et al., 1986; Hojvat et al., 1983). It is therefore possible that a yet uncharacterized central TSH–TSHR feedback circuit may directly regulate the hypothalamic–pituitary–thyroid axis, thought solely to be controlled by thyroid hormones. To add to this complexity, thyroxine-to-triiodothyronine conversion occurs in tanycytes (Fonseca et al., 2013), which calls into question whether central TSH actions regulate thyroid hormone metabolism in these cells and/or directly modulate hypothalamic TRH neuronal projections. Interestingly, it has been shown that Tshr expression is not different between young and old mice (Kerp et al., 2019). However, there is conflicting evidence for the expression of TSH with age—with evidence of no difference between 6-, 15-, and 22-month-old mice (Wang et al., 2019), but a 44% increase in the old rat compared with the young rat (Miler et al., 2019).

The forebrain and olfactory bulb also displayed abundant Tshr transcripts, with the highest density in the nucleus of the horizontal limb of the diagonal band (HDB) of the forebrain and ventral tenia tecta (VTT) of the olfactory bulb. These regions are involved, respectively, in learning and odor processing (Shiotani et al., 2020; Cleland and Linster, 2019; McNamara et al., 2004; Chaves-Coira et al., 2018; Zhan et al., 2013). In the hypothalamus, the highest density was found in medial tuberal nucleus (MTu), which controls ingestive behaviors and metabolism (Luo et al., 2018). Finally, we found more recently that the modulation of TSHRs in the bed nucleus of the stria terminalis (BNST), which receives direct afferents from the MTu (Dong and Swanson, 2006), influences anxiety responses, suggesting that TSHR signaling might, in fact, mediate psychosocial behaviors.

While LH has a key role in reproduction and sexual development, we found 401 brain regions, subregions, and nuclei expressing Lhcgr. There were nominal differences in Lhcgr expression in many brain regions, but the ventricles stood out as having the highest Lhcgr density. Two regions deserve special mention. The Lhcgr–rich mitral cell layer of the accessory olfactory bulb (MiA) has a known role in scent communication during mating (Gildersleeve et al., 2012; Lydell and Doty, 1972; Huck and Banks, 1984; Singh and Bronstad, 2001). A growing body of evidence suggests that men are attracted to cues of impending ovulation in women, raising an intriguing question on whether cycling hormones affect men’s attraction and sexual behavior (Gildersleeve et al., 2012; Singh and Bronstad, 2001). The broader question is whether LH surges in women during cycling may, in fact, alter male sexual behavior through central mechanisms. Second, a high Lhcgr density in the subfornical organ (SFO) of the forebrain was surprising. SFO sends efferent projections to the organum vasculosum of the lamina terminalis (OVLT) (Miselis, 1981; Lind, 1986), which is surrounded by GnRH neurons and contains estrogen receptors (ESR) (Low, 2016). We therefore speculate that circumventricular interactions between LHCGR, LH, GnRH, and ESR underpin the central regulation of reproduction.

RNAscope revealed 353 Fshr-expressing brain regions, subregions, and nuclei. Highest expression was noted in the ependymal layer, not surprisingly given its anatomical proximity to the anterior pituitary gland where FSH is produced in response to hypothalamic gonadotropin-releasing hormone (GnRH). The functional significance of Fshr expressed in the cerebellum, particularly in the paraflocculus (PFI), is yet unknown. However, other Fshr-high subregions, including the granular cell layer of the accessory olfactory bulb (GrA), granular layer of the dentate gyrus (GrDG), and agranular insular cortex (AIV), have known associations with odor processing, learning, memory formation, and anticipation of reward (Eichenbaum, 2001; Nagayama et al., 2014; Kesner and Gilbert, 2007). It is possible that the anosmia of Kallman syndrome, with unclear etiology, may arise from a dysfunctional FSHR-olfaction circuitry. We also find that inactivation of the hippocampal Fshr blunts the cognitive impairment and AD-like neuropathology induced by ovariectomy in 3xTg mice. This data, together with gain- and loss-of-function studies, suggests that hippocampal and cortical FSHR could represent therapeutic targets for AD.

In all, our results provide compelling evidence for multiple central nodes being targets of the anterior pituitary glycoprotein hormones—a paradigm shift that does not conform with the dogma that pituitary hormones are solely master regulators of single bodily processes. Through the intercession of emerging technologies, we compiled the most complete atlas of glycoprotein hormone receptor distribution in the brain at a single-transcript resolution. In addition, we have identified brain sites with the highest transcript expression and density, findings that are imperative toward a better understanding of the neuroanatomical and functional basis of pituitary hormone signaling in the brain. This understanding should provide the foundation for innovative pharmacological interventions for a range of human diseases, wherein direct actions of pituitary hormones have been implicated, importantly, AD.

Glossary of the brain regions, nuclei, and subnuclei.

Cerebellum

Ant anterior lobe cerebellum

Crus1 crus 1 of the ansiform lobule

FI flocculus

mcp middle cerebellar peduncle

pcn precentral fissure

pcuf preculminate fissure

PFI paraflocculus

plf posterolateral fissure

ppf prepyramidal fissure

prf primary fissure

sf secondary fissure

Sim simple lobule

Cerebral cortex

AI agranular insular cortex

AID agranular insular cortex, dorsal part

AIP agranular insular cortex, posterior part

AIV agranular insular cortex, ventral part

Au1 primary auditory cortex

AuD secondary auditory cortex, dorsal area

AuV secondary auditory cortex, ventral area

Cg/RS cingular/retrosplenial cortex

Cg1 cingulate cortex, area 1

Cg2 cingulate cortex, area 2

CI caudal interstitial nucleus of the medial longitudinal fasciculus

DEn dorsal endopiriform nucleus

DI dysgranular insular cortex

DLO dorsolateral orbital cortex

DP dorsal peduncular cortex

Ect ectorhinal cortex

FrA frontal association cortex

IL infralimbic cortex

LEnt lateral entorhinal cortex

LO lateral orbital cortex

LPtA lateral parietal association cortex

M1 primary motor cortex

M2 secondary motor cortex

MEnt medial entorhinal cortex

MO medial orbital cortex

MPtA medial parietal association cortex

Pir piriform cortex

PRh perirhinal cortex

PrL prelimbic cortex

RSA retrosplenial agranular cortex

RSG retrosplenial granular cortex

S1 primary somatosensory cortex

S1BF primary somatosensory cortex, barrel field

S1DZ primary somatosensory cortex, dysgranular region

S1FL primary somatosensory cortex, forelimb region

S1HL primary somatosensory cortex, hindlimb region

S1J primary somatosensory cortex, jaw region

S1Sh primary somatosensory cortex, shoulder region

S1ShNc primary somatosensory cortex, shoulder/neck region

S1Tr primary somatosensory cortex, trunk region

S1ULp primary somatosensory cortex, upper lip region

S2 secondary somatosensory cortex

SL semilunar nucleus

TeA temporal association cortex

V1 primary visual cortex

V2L secondary visual cortex, lateral area

V2ML secondary visual cortex, mediolateral area

V2MM secondary visual cortex, mediomedial area

VEn ventral endopiriform nucleus

VO ventral orbital cortex

Forebrain

AAD anterior amygdaloid area, dorsal part

AAV anterior amygdaloid area, ventral part

ac anterior commissure

Acb accumbens nucleus

AcbC accumbens nucleus, core

AcbSh accumbens nucleus, shell

aci anterior commissure, intrabulbar part

ADP anterodorsal preoptic nucleus

AVPe anteroventral periventricular nucleus

BAC bed nucleus of the anterior commissure

BST bed nucleus of the stria terminalis

BSTIA bed nucleus of the stria terminalis, intraamygdaloid division

BSTLD bed nucleus of the stria terminalis, lateral division, dorsal part

BSTLI bed nucleus of the stria terminalis, lateral division, intermediate part

BSTLJ bed nucleus of the stria terminalis, lateral division, juxtacapsular part

BSTLP bed nucleus of the stria terminalis, lateral division, posterior part

BSTLV bed nucleus of the stria terminalis, lateral division, ventral part

BSTMA bed nucleus of the stria terminalis, medial division, anterior part

BSTMP bed nucleus of the stria terminalis, medial division, posterior part

BSTMPI bed nucleus of the stria terminalis, medial division, posterointermediate part

BSTMPL bed nucleus of the stria terminalis, medial division, posterolateral part

BSTMPM bed nucleus of the stria terminalis, medial division, posteromedial part

BSTMV bed nucleus of the stria terminalis, medial division, ventral part

CPu caudate putamen (striatum)

fmi forceps minor of the corpus callosum

HDB nucleus of the horizontal limb of the diagonal band

ICjM islands of Calleja, major island

IPACL interstitial nucleus of the posterior limb of the anterior commissure, lateral part

IPACM interstitial nucleus of the posterior limb of the anterior commissure, medial part

LAcbSh lateral accumbens shell

Ld lambdoid septal zone

LPO lateral preoptic area

LSD lateral septal nucleus, dorsal part

LSI lateral septal nucleus, intermediate part

LSS lateral stripe of the striatum

LSV lateral septal nucleus, ventral part

MCPO magnocellular preoptic nucleus

MnPO median preoptic nucleus

MPA medial preoptic area

MPOC medial preoptic nucleus, central part

MPOL medial preoptic nucleus, lateral part

MPOM medial preoptic nucleus, medial part

MS medial septal nucleus

SFi septofimbrial nucleus

SFO subfornical organ

SHi septohippocampal nucleus

SHy septohypothalamic nucleus

SI substantia innominata

st stria terminalis

TS triangular septal nucleus

VDB nucleus of the vertical limb of the diagonal band

VMPO ventromedial preoptic nucleus

VOLT vascular organ of the lamina terminalis

VP ventral pallidum

Hippocampus

CA1 field CA1 of hippocampus

CA2 field CA2 of hippocampus

CA3 field CA3 of hippocampus

DG dentate gyrus

dhc dorsal hippocampal commissure

f fornix

FC fasciola cinereum

fi fimbria of the hippocampus

GrDG granular layer of the dentate gyrus

LMol lacunosum moleculare layer of the hippocampus

Mol molecular layer of the dentate gyrus

Or oriens layer of the hippocampus

PaS parasubiculum

PoDG polymorph layer of the dentate gyrus

PrS presubiculum

Py pyramidal tract

Rad stratum radiatum of the hippocampus

S subiculum

Hypothalamus

AAD anterior amygdaloid area, dorsal part

AAV anterior amygdaloid area, ventral part

ACo anterior cortical amygdaloid nucleus

AHA anterior hypothalamic area, anterior part

AHC anterior hypothalamic area, central part

AHiAL amygdalohippocampal area, anterolateral part

AHiPM amygdalohippocampal area, posteromedial part

AHP anterior hypothalamic area, posterior part

APir amygdalopiriform transition area

Arc arcuate hypothalamic nucleus

ArcD arcuate hypothalamic nucleus, dorsal part

ArcL arcuate hypothalamic nucleus, lateral part

ArcLP arcuate hypothalamic nucleus, lateroposterior part

ArcMP arcuate hypothalamic nucleus, medial posterior part

AStr amygdalostriatal transition area

BLA basolateral amygdaloid nucleus, anterior part

BLP basolateral amygdaloid nucleus, posterior part

BLV basolateral amygdaloid nucleus, ventral part

BMA basolateral amygdaloid nucleus, anterior part

BMP basomedial amygdaloid nucleus, posterior part

CeC central amygdaloid nucleus, capsular part

CeL central amygdaloid nucleus, lateral division

CeM central amygdaloid nucleus, medial division

CeMPV central amygdaloid nucleus, medial posteroventral part

cp cerebral peduncle, basal part

CxA cortex-amygdala transition zone

DM dorsomedial hypothalamic nucleus

DMC dorsomedial hypothalamic nucleus, compact part

DMD dorsomedial hypothalamic nucleus, dorsal part

DMV dorsomedial hypothalamic nucleus, ventral part

FF fields of Forel

LA lateroanterior hypothalamic nucleus

LaDL lateral amygdaloid nucleus, dorsolateral part

LaVL lateral amygdaloid nucleus, ventrolateral part

LaVM lateral amygdaloid nucleus, ventromedial part

LH lateral hypothalamic area

LM lateral mammillary nucleus

MCLH magnocellular nucleus of the lateral hypothalamus

ME median eminence

MeAD medial amygdaloid nucleus, anteriodorsal part

MeAV medial amygdaloid nucleus, anteroventral part

MePD medial amygdaloid nucleus, posterodorsal part

MePV medial amygdaloid nucleus, posteroventral part

ML medial mammillary nucleus, lateral part

MM medial mammillary nucleus, medial part

MMn medial mammillary nucleus, median part

mt mammillothalamic tract

MTu medial tuberal nucleus

ns nigrostriatal bundle

opt optic tract

PeF perifornical nucleus

PH posterior hypothalamic area

PLCo posterolateral cortical amygdaloid nucleus

PMCo posteromedial cortical amygdaloid nucleus

PMD premammillary nucleus, dorsal part

PMV premammillary nucleus, ventral part

PR prerubral field

PS parastrial nucleus

PSTh parasubthalamic nucleus

Subl subincertal nucleus

SuM supramammillary nucleus

SuML supramammillary nucleus, lateral part

SuMM supramammillary nucleus, medial part

TC tuber cinereum area

Te terete hypothalamic nucleus

VLPO ventrolateral preoptic nucleus

VMH ventromedial hypothalamic nucleus

VMHC ventromedial hypothalamic nucleus, central part

VMHDM ventromedial hypothalamic nucleus, dorsomedial part

VMHVL ventromedial hypothalamic nucleus, ventrolateral part

ZI zona incerta

ZID zona incerta, dorsal part

ZIV zona incerta, ventral part

Medulla

AP area postrema

Cu cuneate nucleus

DC dorsal cochlear nucleus

DLL dorsal nucleus of the lateral lemniscus

DMSp5 dorsomedial spinal trigeminal nucleus

DPGi dorsal paragigantocellular nucleus

Gi gigantocellular reticular nucleus

ILL intermediate nucleus of the lateral lemniscus

IO inferior olive

IRt intermediate reticular nucleus

LPGi lateral paragigantocellular nucleus

LVe lateral vestibular nucleus

LVPO lateroventral periolivary nucleus

MdD medullary reticular nucleus, dorsal part

MdV medullary reticular nucleus, ventral part

ml medial lemniscus

MVeMC medial vestibular nucleus, magnocellular part

MVePC medial vestibular nucleus, parvicellular part

MVPO medioventral periolivary nucleus

PCRt parvicellular reticular nucleus

PCRtA parvicellular reticular nucleus, alpha part

PL paralemniscal nucleus

Pr prepositus nucleus

Pr5 principal sensory trigeminal nucleus

RMg raphe magnus nucleus

RPO rostral periolivary region

Sol solitary tract

SolC nucleus of the solitary tract, commissural part

SolG nucleus of the solitary tract, gelatinous part

SolIM nucleus of the solitary tract, intermediate part

SolM nucleus of the solitary tract, medial part

SolV solitary nucleus, ventral part

sp5 spinal trigeminal tract

Sp5C spinal trigeminal nucleus, caudal part

Sp5I spinal trigeminal nucleus, interpolar part

Sp5O spinal trigeminal nucleus, oral part

SpVe spinal vestibular nucleus

tz trapezoid body

VCA ventral cochlear nucleus, anterior part

VLL ventral nucleus of the lateral lemniscus

vsc ventral spinocerebellar tract

Midbrain and pons

3N oculomotor nucleus

3PC oculomotor nucleus, parvicellular part

ATg anterior tegmental nucleus

BIC nucleus of the brachium of the inferior colliculus

bic brachium of the inferior colliculus

bp brachium pontis (stem of middle cerebellar peduncle)

CGPn central gray of the pons

CIC central nucleus of the inferior colliculus

CLi caudal linear nucleus of the raphe

CnF cuneiform nucleus

csc commissure of the superior colliculus

DCIC dorsal cortex of the inferior colliculus

Dk nucleus of Darkschewitsch

DLPAG dorsolateral periaqueductal gray

DMPAG dorsomedial periaqueductal gray

DMPn dorsomedial pontine nucleus

DMTg dorsomedial tegmental area

DpG deep gray layer of the superior colliculus

DpMe deep mesencephalic nucleus

DpWh deep white layer of the superior colliculus

DR dorsal raphe nucleus

DRC dorsal raphe nucleus, caudal part

DRD dorsal raphe nucleus, dorsal part

DRI dorsal raphe nucleus, interfascicular part

DRV dorsal raphe nucleus, ventral part

DRVL dorsal raphe nucleus, ventrolateral part

DT dorsal terminal nucleus of the accessory optic tract

DTgP dorsal tegmental nucleus, pericentral part

ECIC external cortex of the inferior colliculus

EMi epimicrocellular nucleus

IF interfascicular nucleus

InC interstitial nucleus of Cajal

InCG interstitial nucleus of Cajal, greater part

InCo intercollicular nucleus

InG intermediate gray layer of the superior colliculus

InWh intermediate white layer of the superior colliculus

IP interpeduncular nucleus

IPC interpeduncular nucleus, caudal subnucleus

IPDL interpeduncular nucleus, dorsolateral subnucleus

IPDM interpeduncular nucleus, dorsomedial subnucleus

IPF interpeduncular fossa

IPI interpeduncular nucleus, intermediate subnucleus

IPL interpeduncular nucleus, lateral subnucleus

IPR interpeduncular nucleus, rostral subnucleus

KF Kölliker-Fuse nucleus

LC locus coeruleus

LDTg laterodorsal tegmental nucleus

lfp longitudinal fasciculus of the pons

LPAG lateral periaqueductal gray

LPB lateral parabrachial nucleus

LPBC lateral parabrachial nucleus, central part

LPBE lateral parabrachial nucleus, external part

LPBS lateral parabrachial nucleus, superior part

LPBV lateral parabrachial nucleus, ventral part

MA3 medial accessory oculomotor nucleus

MCPC magnocellular nucleus of the posterior commissure

Me5 mesencephalic trigeminal nucleus

MGD medial geniculate nucleus, dorsal part

MGM medial geniculate nucleus, medial part

MGV medial geniculate nucleus, ventral part

Min minimus nucleus

MiTG microcellular tegmental nucleus

ml medial lemniscus

mlf medial longitudinal fasciculus

MnR median raphe nucleus

Mo5 motor trigeminal nucleus

MPB medial parabrachial nucleus

mtg mammillotegmental tract

MZMG marginal zone of the medial geniculate

Op optic nerve layer of the superior colliculus

OT nucleus of the optic tract

PAG periaqueductal gray

PBG parabigeminal nucleus

PBP parabrachial pigmented nucleus

pc posterior commissure

PCom nucleus of the posterior commissure

PMnR paramedian raphe nucleus

Pn pontine nuclei

PN paranigral nucleus

PnC pontine reticular nucleus, caudal part

PnO pontine reticular nucleus, oral part

PnV pontine reticular nucleus, ventral part

PP peripeduncular nucleus

PPT posterior pretectal nucleus

PPTg pedunculopontine tegmental nucleus

Pr5DM principal sensory trigeminal nucleus, dorsomedial part

Pr5VL principal sensory trigeminal nucleus, ventrolateral part

R red nucleus

RC raphe cap

RLi rostral linear nucleus of the raphe

RMC red nucleus, magnocellular part

RPC red nucleus, parvicellular part

RPF retroparafascicular nucleus

RR retrorubral nucleus

RRF retrorubral field

rs rubrospinal tract

RtTg reticulotegmental nucleus of the pons

RtTgP reticulotegmental nucleus of the pons, pericentral part

Sag sagulum nucleus

SC superior colliculus

scp superior cerebellar peduncle (brachium conjunctivum)

SNC substantia nigra, compact part

SNL substantia nigra, lateral part

SNR substantia nigra, reticular part

SPO superior paraolivary nucleus

SPTg subpedencular tegmental nucleus

Su3 supraoculomotor periaqueductal gray

Su3C supraoculomotor cap

Su5 supratrigeminal nucleus

SubB subbrachial nucleus

SubCD subcoeruleus nucleus, dorsal part

SubCV subcoeruleus nucleus, ventral part

SuG superficial gray layer of the superior colliculus

ts tectospinal tract

Tz nucleus of the trapezoid body

VLPAG ventrolateral periaqueductal gray

VLTg ventrolateral tegmental area

VTA ventral tegmental area

VTg ventral tegmental nucleus

VTRZ visual tegmental relay zone

xscp decussation of the superior cerebellar peduncle

Zo zonal layer of the superior colliculus

Olfactory bulb

AOB accessory olfactory bulb

AOD anterior olfactory nucleus, dorsal part

AOE anterior olfactory nucleus, external part

AOL anterior olfactory nucleus, lateral part

AOM anterior olfactory nucleus, medial part

AOP anterior olfactory nucleus, posterior part

AOV anterior olfactory nucleus, ventral part

DTT dorsal tenia tecta

EPI external plexiform layer of the olfactory bulb

EPIA external plexiform layer of the accessory olfactory bulb

GIA glomerular layer of the accessory olfactory bulb

Gl glomerular layer of the olfactory bulb

GrA granule cell layer of the accessory olfactory bulb

GrO granular cell layer of the olfactory bulb

IPI interpeduncular nucleus, intermediate subnucleus

lo lateral olfactory tract

LOT nucleus of the lateral olfactory tract

Mi mitral cell layer of the olfactory bulb

MiA mitral cell layer of the accessory olfactory bulb

Tu olfactory tubercle

VTT ventral tenia tecta

Thalamus

aca anterior commissure, anterior part

acp anterior commissure, posterior

Ang angular thalamic nucleus

APT anterior pretectal nucleus

APTD anterior pretectal nucleus, dorsal part

APTV anterior pretectal nucleus, ventral part

CL centrolateral thalamic nucleus

CM central medial thalamic nucleus

DLG dorsal lateral geniculate nucleus

eml external medullary lamina

Eth ethmoid thalamic nucleus

F nucleus of the fields of Forel

fr fasciculus retroflexus

Gus gustatory thalamic nucleus

ic internal capsule

IGL intergeniculate leaf

IMA intramedullary thalamic area

IMD intermediodorsal thalamic nucleus

LDDM laterodorsal thalamic nucleus, dorsomedial part

LDVL laterodorsal thalamic nucleus, ventrolateral part

LGP lateral globus pallidus

LHb lateral habenular nucleus

LHbL lateral habenular nucleus, lateral part

LHbM lateral habenular nucleus, medial part

LPLC lateral posterior thalamic nucleus, laterocaudal part

LPLR lateral posterior thalamic nucleus, laterorostral part

LPMC lateral posterior thalamic nucleus, mediocaudal part

LPMR lateral posterior thalamic nucleus, mediorostral part

MDC mediodorsal thalamic nucleus, central part

MDL mediodorsal thalamic nucleus, lateral part

MDM mediodorsal thalamic nucleus, medial part

MGP medial globus pallidus (entopeduncular nucleus)

MHb medial habenular nucleus

MPT medial pretectal nucleus

OPC oval paracentral thalamic nucleus

OPT olivary pretectal nucleus

OT nucleus of the optic tract

PC paracentral thalamic nucleus

PF parafascicular thalamic nucleus

PIL posterior intralaminar thalamic nucleus

PLi posterior limitans thalamic nucleus

Po posterior thalamic nuclear group

PoMn posteromedian thalamic nucleus

PoT posterior thalamic nuclear group, triangular part

PP peripeduncular nucleus

PPT posterior pretectal nucleus

PrC precommissural nucleus

pv periventricular fiber system

PV paraventricular thalamic nucleus

PVA paraventricular thalamic nucleus, anterior part

PVP paraventricular thalamic nucleus, posterior part

Re reuniens thalamic nucleus

REth retroethmoid nucleus

Rh rhomboid thalamic nucleus

RI rostral interstitial nucleus of medial longitudinal fasciculus

Rt reticular thalamic nucleus

SCO subcommissural organ

SG suprageniculate thalamic nucleus

sm stria medullaris of the thalamus

SPF subparafascicular thalamic nucleus

STh subthalamic nucleus

str superior thalamic radiation

Sub submedius thalamic nucleus

SubG subgeniculate nucleus

VL ventrolateral thalamic nucleus

VLG ventral lateral geniculate nucleus

VLGMC ventral lateral geniculate nucleus, magnocellular part

VLGPC ventral lateral geniculate nucleus, parvicellular part

VM ventromedial thalamic nucleus

VPL ventral posterolateral thalamic nucleus

VPM ventral posteromedial thalamic nucleus

VRe ventral reuniens thalamic nucleus

Xi xiphoid thalamic nucleus

Ventricular zones

3V 3rd ventricle

OV olfactory ventricle (olfactory part of lateral ventricle)

SVZ subventricular zone of the lateral ventricle

All data generated or analyzed during this study are included in the manuscript and supporting file.

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Author details

1. Vitaly Ryu

   1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
   2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

   Contribution

   Data curation, Formal analysis, Validation, Investigation, Writing - original draft

   Competing interests

   No competing interests declared

   "This ORCID iD identifies the author of this article:" 0000-0001-8068-4577

2. Anisa Gumerova

   1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
   2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

   Contribution

   Data curation, Investigation

   Competing interests

   No competing interests declared

3. Funda Korkmaz

   1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
   2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

   Contribution

   Investigation

   Competing interests

   No competing interests declared

4. Seong Su Kang

   Department of Pathology, Emory University School of Medicine, Atlanta, United States

   Contribution

   Data curation, Investigation, Methodology

   Competing interests

   No competing interests declared

   "This ORCID iD identifies the author of this article:" 0000-0002-2517-9962

5. Pavel Katsel

   Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, United States

   Contribution

   Data curation, Investigation

   Competing interests

   No competing interests declared

   "This ORCID iD identifies the author of this article:" 0000-0001-8076-0162

6. Sari Miyashita

   1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
   2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

   Contribution

   Investigation

   Competing interests

   No competing interests declared

7. Hasni Kannangara

   1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
   2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

   Contribution

   Investigation

   Competing interests

   No competing interests declared

8. Liam Cullen

   1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
   2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

   Contribution

   Data curation, Investigation

   Competing interests

   No competing interests declared

9. Pokman Chan

   Alamak Biosciences, Beverly, United States

   Contribution

   Data curation, Investigation, Methodology

   Competing interests

   No competing interests declared

10. TanChun Kuo

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Data curation, Investigation

    Competing interests

    No competing interests declared

    "This ORCID iD identifies the author of this article:" 0000-0001-5301-755X

11. Ashley Padilla

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Investigation

    Competing interests

    No competing interests declared

12. Farhath Sultana

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Investigation

    Competing interests

    No competing interests declared

13. Soleil A Wizman

    Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Investigation

    Competing interests

    No competing interests declared

14. Natan Kramskiy

    Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Investigation

    Competing interests

    No competing interests declared

15. Samir Zaidi

    Memorial Sloan Kettering Cancer Center, New York, United States

    Contribution

    Data curation

    Competing interests

    No competing interests declared

16. Se-Min Kim

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Investigation

    Competing interests

    No competing interests declared

17. Maria I New

    Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Conceptualization, Project administration

    Competing interests

    No competing interests declared

18. Clifford J Rosen

    Maine Medical Center Research Institute, Scarborough, United States

    Contribution

    Conceptualization, Funding acquisition, Project administration

    Competing interests

    No competing interests declared

19. Ki A Goosens

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Investigation

    Competing interests

    No competing interests declared

    "This ORCID iD identifies the author of this article:" 0000-0002-5246-2261

20. Tal Frolinger

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Validation, Investigation

    Competing interests

    No competing interests declared

21. Vahram Haroutunian

    Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Conceptualization, Project administration

    Competing interests

    has received consultation fees from Synaptec to Cold Spring Harbor Laboratories

22. Keqiang Ye

    Faculty of Life and Health Sciences, and Brain Cognition and Brain Disease Institute, Shenzhen Institute of Advanced technology, Chinese Academy of Sciences, Shenzhen, China

    Contribution

    Conceptualization, Project administration

    Competing interests

    Reviewing editor, eLife

23. Daria Lizneva

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Investigation, Project administration

    Competing interests

    No competing interests declared

24. Terry F Davies

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Conceptualization, Funding acquisition, Project administration

    Competing interests

    has received payments from Kronus Inc, Starr, ID as a Board member and for various books and ebooks

25. Tony Yuen

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Conceptualization, Supervision, Funding acquisition, Methodology, Writing - original draft, Project administration, Writing - review and editing

    For correspondence

    Tony.yuen@mountsinai.org

    Competing interests

    Reviewing editor, eLife

26. Mone Zaidi

    1. Center for Translational Medicine and Pharmacology, Icahn School of Medicine at Mount Sinai, New York, United States
    2. Department of Medicine and of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, United States

    Contribution

    Conceptualization, Supervision, Funding acquisition, Writing - original draft, Project administration, Writing - review and editing

    For correspondence

    mone.zaidi@mountsinai.org

    Competing interests

    Senior editor, eLife

    "This ORCID iD identifies the author of this article:" 0000-0001-5911-9522

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