Document Detail

Neuroendocrine control of physiological color change in Chameleo gracilis.
MedLine Citation:
PMID:  3557095     Owner:  NLM     Status:  MEDLINE    
Color changes in Chameleo gracilis are under neuroendocrine control. Denervation of the limbs, by removal of the sciatic or brachial nerves, does not interfere with the normal color changes in the affected limbs. Denervated skins, placed back onto C. gracilis, show color changes in synchrony with the rest of the animal. Pieces of isolated skin turn very dark or black in alpha-melanophore stimulating hormone (alpha-MSH) and green in adrenaline, but do not show any color changes in physiological saline. Hypophysectomized animals turn green but never turn dark. Injections of alpha-MSH cause intact or hypophysectomized animals to turn dark or black, while injections of adrenaline cause them to turn light green. Injections of physiological saline have no effect. Crude pituitary extracts cause darkening of isolated skins or of intact animals injected with such extracts. Similar treatment with crude extracts of adrenal glands causes the skins to become light green. Electrical stimulation of transected spinal cord leads to localized lightening of the skin but never to darkening of the same. Light, temperature, darkness, and color of the surroundings influence color change. Color change to green at night and to darker colors in the daytime suggests a possible circadian rhythm in the phenomenon.
O Okelo
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  General and comparative endocrinology     Volume:  64     ISSN:  0016-6480     ISO Abbreviation:  Gen. Comp. Endocrinol.     Publication Date:  1986 Nov 
Date Detail:
Created Date:  1987-05-06     Completed Date:  1987-05-06     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370735     Medline TA:  Gen Comp Endocrinol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  305-11     Citation Subset:  IM    
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MeSH Terms
Adrenal Glands / physiology
Electric Stimulation
Epinephrine / pharmacology
Extremities / innervation
Lizards / physiology*
Melanocyte-Stimulating Hormones / pharmacology
Pituitary Gland / physiology
Skin / drug effects,  innervation
Skin Physiological Phenomena
Spinal Cord / physiology
Tissue Extracts / pharmacology
Reg. No./Substance:
0/Tissue Extracts; 51-43-4/Epinephrine; 9002-79-3/Melanocyte-Stimulating Hormones

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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