TESTOSTERONE CONTROL of END-PLATE and NON-END-PLATE ACETYLCHOLINESTERASE in the RAT LEVATOR ANI MUSCLE
Godinho, R. O.
Lapa, A. J.
Is part ofNeurochemical Research
MetadataShow full item record
The time course of effects of castration (5-60 days) and testosterone treatment (15-60 days) of adult male rats were examined on the endplate (+EP) and non-endplate (-EP) acetylcholinesterase (AChE) of the androgen-dependent levator ani (LA) muscle. the thiocholine method was used to determine the enzyme activity. Castration caused LA muscle atrophy within 5 days but reduced the -EP and +EP AChE after 10 and 20 days, respectively. Following 30 days castration -EP and +EP AChE reached respectively 41% and 35% of control activity. Testosterone retrieval restored the control values of both muscle weight and total AChE after 15 and 60 days, respectively. Recovery of the +EP AChE preceded that of -EP AChE by 30 days. the results showed that in the rat LA muscle, +EP and -EP AChE depend on a continuous testosterone regulation that predominates at +EP region spreading thereafter to -EP region. Those data suggest a hormone regulation of AChE exerted indirectly through the synthesis and release of neurotrophic substances.
CitationNeurochemical Research. New York: Plenum Publ Corp, v. 19, n. 6, p. 657-663, 1994.
LEVATOR ANI MUSCLE
- EPM - Artigos