Int Neurourol J.  2018 Sep;22(3):161-168. 10.5213/inj.1836116.058.

High Estradiol Differentially Affects the Expression of the Glucose Transporter Type 4 in Pelvic Floor Muscles of Rats

• de los Ángeles Carrasco-Ruiz
• Hernández-Aragón LG
• Chávez-Ríos JR
• Rodríguez-Antolín J
• Pacheco P
• Martínez-Gómez M
• Cuevas-Romero E
• Castelán

• KMID: 2422503
• DOI: http://doi.org/10.5213/inj.1836116.058

Abstract

PURPOSE
To characterize the relationship between serum estradiol levels and the expression of glucose transporter type 4 (Glut4) in the pubococcygeus and iliococcygeus muscles in female rats.
METHODS
The muscles were excised from virgin rats during the metestrus and proestrus stages of the estrous cycle, and from sham and ovariectomized rats implanted with empty or estradiol benzoate-filled capsules. The expression of estrogen receptors (ERs) was inspected in the muscles at metestrus and proestrus. Relative Glut4 expression, glycogen content, and serum glucose levels were measured. Appropriate statistical tests were done to identify significant differences (P≤0.05).
RESULTS
The pubococcygeus and iliococcygeus muscles expressed ERα and ERβ. Glut4 expression and glycogen content in the pubococcygeus muscle were higher at proestrus than at metestrus. No significant changes were observed in the iliococcygeus muscle. In ovariectomized rats, the administration of estradiol benzoate increased Glut4 expression and glycogen content in the pubococcygeus muscle alone.
CONCLUSIONS
High serum estradiol levels increased Glut4 expression and glycogen content in the pubococcygeus muscle, but not in the iliococcygeus muscle.

Keyword

Estradiol; Estrogen receptors; Glycogen; Metabolism; Ovariectomy

MeSH Terms

Animals
Benzoates
Blood Glucose
Capsules
Estradiol*
Estrous Cycle
Female
Glucose Transport Proteins, Facilitative*
Glucose Transporter Type 4*
Glucose*
Glycogen
Humans
Metabolism
Metestrus
Muscles*
Ovariectomy
Pelvic Floor*
Proestrus
Rats*
Receptors, Estrogen
Benzoates
Capsules
Estradiol
Glucose
Glucose Transport Proteins, Facilitative
Glucose Transporter Type 4
Glycogen
Receptors, Estrogen