Expression and characterization of melanin-concentrating hormone receptors on mammalian cell lines.
The neuropeptide melanin-concentrating hormone (MCH) is expressed in central and peripheral tissues where it participates in the complex network regulating energy homeostasis as well as in other physiologically important functions. Two MCH receptor subtypes, MCH-R1 and MCH-R2, have been cloned which signal through activation of Gi/o/q proteins and hence regulate different intracellular signals, such as inhibition of cAMP formation, stimulation of IP3 production, increase in intracellular free Ca2+ and/or activation of MAP kinases. Most of the data were obtained with cell systems heterologously expressing either of the MCH receptors. Fewer reports exist on studies with cell lines which endogenously express MCH receptors. Here, we describe human and other mammalian cell lines with which MCH receptor activation can be studied under "natural" conditions and we summarize the characteristics and signaling pathways of the MCH receptors in the different cell systems.
Laboratory of Endocrinology, Department of Research, University Hospital Basel and University Children's Hospital Basel, Klingelbergstrasse 23, CH-4031 Basel, Switzerland. alex-n@unibas.ch
Alex N
AN
Eberle
Gabriele
G
Mild
Sophie
S
Schlumberger
Roma
R
Drozdz
Edith
E
Hintermann
Urs
U
Zumsteg
D000595:Amino Acid Sequence; D000818:Animals; D002460:Cell Line; D003001:Cloning, Molecular; D017124:Conserved Sequence; D006801:Humans; D008322:Mammals; D051379:Mice; D008969:Molecular Sequence Data; D043562:Receptors, G-Protein-Coupled; D011979:Receptors, Pituitary Hormone / Q000737:chemistry / Q000235:genetics / Q000502:physiology*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D015398:Signal Transduction; D013329:Structure-Activity Relationship
C431280:MCHR2 protein, human; D043562:Receptors, G-Protein-Coupled; D011979:Receptors, Pituitary Hormone; C092274:melanin-concentrating hormone receptor