A Comparative Analysis Shows Morphofunctional Differences between the Rat and Mouse Melanin-Concentrating Hormone Systems

被引:46
作者
Croizier, Sophie [1 ]
Franchi-Bernard, Gabrielle [1 ]
Colard, Claude [1 ]
Poncet, Fabrice [1 ]
La Roche, Annie [1 ]
Risold, Pierre-Yves [1 ]
机构
[1] Univ Franche Comte, Fac Med & Pharmacie, F-25030 Besancon, France
关键词
HYPOCRETIN/OREXIN-CONTAINING NEURONS; LATERAL DORSAL HYPOTHALAMUS; RECEPTOR-DEFICIENT MICE; VENTRAL DIENCEPHALON; EXPRESSION PATTERNS; MCH NEURONS; PEPTIDE; PROJECTIONS; BRAIN; TIME;
D O I
10.1371/journal.pone.0015471
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Sub-populations of neurons producing melanin-concentrating hormone (MCH) are characterized by distinct projection patterns, birthdates and CART/NK3 expression in rat. Evidence for such sub-populations has not been reported in other species. However, given that genetically engineered mouse lines are now commonly used as experimental models, a better characterization of the anatomy and morphofunctionnal organization of MCH system in this species is then necessary. Combining multiple immunohistochemistry experiments with in situ hybridization, tract tracing or BrdU injections, evidence supporting the hypothesis that rat and mouse MCH systems are not identical was obtained: sub-populations of MCH neurons also exist in mouse, but their relative abundance is different. Furthermore, divergences in the distribution of MCH axons were observed, in particular in the ventromedial hypothalamus. These differences suggest that rat and mouse MCH neurons are differentially involved in anatomical networks that control feeding and the sleep/wake cycle.
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页数:12
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