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Neuroanatomical Structure of the MCH System

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Melanin-Concentrating Hormone and Sleep

Abstract

The mammalian melanin-concentrating hormone (MCH) system has been studied for almost 30 years as of the writing of this chapter. The understanding of any neural system starts with its structure, as the anatomical organization of its peptides and receptors provides important clues about its physiological activity. With that in mind, the MCH system will be reviewed as a whole in the first segment of this chapter, including the genes and proteins that comprise this system. In the following segment, a description of the morphological and neurochemical characteristics of MCH neurons will be provided, including the areas in the central nervous system where these neurons are found and their projection pathways and targets. In the last segment, the receptors for MCH will be briefly discussed, and the available anatomical information about these receptors will be presented to the reader. By the end of this chapter, the reader should be able to identify the sites of MCH synthesis, the major targets of MCH action, and the areas responsive to MCH owing to the presence of its receptor.

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Abbreviations

3V:

Third ventricle

3Vdc:

Third ventricle dorsal cap

aa:

Amino acid(s)

AHA:

Anterior hypothalamic area

ANP:

Atrial natriuretic peptide

AROM :

Antisense-RNA-overlapping-MCH gene

AVP:

Arginine vasopressin

BNST:

Bed nucleus of the stria terminalis

CART:

Cocaine- and amphetamine-regulated transcript

CNS:

Central nervous system

CRF:

Corticotropin-releasing factor

f:

Fornix

GAD67:

Glutamate decarboxylase 67 kDa

GPCR:

G protein-coupled receptor

ic:

Internal capsule

IHy:

Incertohypothalamic area

IRE:

Interferon-gamma responsive element

LDT:

Laterodorsal tegmental nucleus

LHA:

Lateral hypothalamic area

MCH:

Melanin-concentrating hormone (peptide)

MCHR1:

Melanin-concentrating hormone receptor 1 (peptide)

MCHR1 :

Melanin-concentrating hormone receptor 1 (primate gene)

Mchr1 :

Melanin-concentrating hormone receptor 1 (rodent gene)

MCHR2:

Melanin-concentrating hormone receptor 2 (peptide)

MCHR2 :

Melanin-concentrating hormone receptor 2 (primate gene)

ME:

Median eminence

mfb :

Medial forebrain bundle

mt:

Mammillothalamic tract

MGOP:

MCH-gene-overprinted-polypeptide

MPOA:

Medial preoptic area

NEI:

Neuropeptide glutamic acid-isoleucine

NGE:

Neuropeptide glycine-glutamic acid

NPY:

Neuropeptide Y

opt:

Optic tract

ORF:

Open reading frame

ORX:

Orexin/hypocretin

PACAP:

Pituitary adenylate cyclase-activating peptide

PC:

Prohormone convertase(s)

PH:

Posterior hypothalamic area

Pmch :

Pro-melanin-concentrating hormone (rodent gene)

PMCH :

Pro-melanin-concentrating hormone (primate gene)

PMCHL1 :

Pro-melanin-concentrating hormone linked gene 1 (chimeric gene)

PMCHL2 :

Pro-melanin-concentrating hormone linked gene 2 (chimeric gene)

pmPRt:

Paramedian pontine reticular formation

ppMCH:

Prepro-melanin-concentrating hormone

PVH:

Paraventricular nucleus of the hypothalamus

REM:

Rapid eye movement sleep

SDL:

Subcoeruleus/sublaterodorsal nucleus

SLC-1:

Somatostatin-like coupled receptor 1, same as MCHR1

SP:

Substance P

SSTR:

Somatostatin receptor(s)

TM:

Transmembrane

TMdm:

Tuberomammillary nucleus, dorsomedial part

Tu:

Olfactory tubercle

X-ir:

Immunoreactive to X

ZI:

Zona incerta

α-MSH:

α-Melanocyte-stimulating hormone

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Acknowledgments

The writing of this chapter would not be possible without the funding granted by the Fundação de Amparo à Pesquisa do Estado de São Paulo [São Paulo Research Foundation—FAPESP], grants #2010/52068-0 and #2016/02224-1 [JCB] and #2016/02748-0 [GBD]. JCB is also a recipient of a grant from the Coordenação de Aperfeiçoamento de Pessoal de Ensino Superior [Agency for the Advancement of Higher Education] and the Comité Français d’Evaluation de la Coopération Universitaire avec le Brésil [French Committee for the Evaluation of Academic and Scientific Cooperation with Brazil], CAPES-COFECUB grant #848/15. JCB is an investigator with the Conselho Nacional de Desenvolvimento Científico e Tecnológico [National Council for Scientific and Technological Development—CNPq, Brazil], recipient of grant #426378/2016-4.

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Correspondence to Jackson C. Bittencourt .

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Bittencourt, J.C., Diniz, G.B. (2018). Neuroanatomical Structure of the MCH System. In: Pandi-Perumal, S., Torterolo, P., Monti, J. (eds) Melanin-Concentrating Hormone and Sleep . Springer, Cham. https://doi.org/10.1007/978-3-319-75765-0_1

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