FSH and LH Secretion from
in-vitro Cultured Buffalo Anterior Pituitary Cells Following
Treatment with Diethyl-Stilbestrol and Medroxy-Progesterone and
Their Effects on Ovarian Activity and Hematological Variables of
Female Rabbits
Kaleem Iqbal1, Nafees Akhtar1*,
Nazir Ahmad1 and Sajjad-ur-Rahman2
1Department
of Theriogenology; 2 Institute of Microbiology,
University of Agriculture, Faisalabad, Pakistan *Corresponding author: nafees439@yahoo.com
Abstract
Aims of this study were: to investigate whether FSH and LH secretion from
in-vitro cultured buffalo adenohypophyseal cells can be increased by
supplementing culture media with diethyl-stilbestrol and medroxy-progesterone,
respectively; to monitor bioactivity of these in-vitro produced gonadotropins
and to see if these gonadotropins have any adverse effects on hematology and
internal body organs of female rabbits. Pituitary glands collected from 36 adult
buffaloes slaughtered at a local abattoir were used. The anterior pituitary
cells were cultured in-vitro using medium RPMI-1640 (code R6504-Sigma) enriched
with 10% fetal calf serum and GnRH and treated with 0.5 or 1.0 mg/100 ml
diethyl-stilbestrol, and 2.5 or 5.0 mg/ml medroxy-progesterone, or left as
untreated control. The results showed that FSH and LH concentrations from
cultures treated with low or high dose of respective steroids were higher
(P<0.05) than those for controls. Treatment of pre-pubertal female rabbits with
in-vitro extracted FSH increased serum FSH and LH concentrations, ovarian size
and number of developing follicles (GFs) on the ovaries compared to controls
(P<0.01). However, rabbits treated with in-vitro produced extract of LH showed
increased serum FSH and LH, while there was no effect on ovarian size and number
of GFs. Moreover, treatment of rabbits with both gonadotropins had no effects on
body weight, hematological variables and internal body organs. In conclusion,
diethyl-stilbestrol and medroxy-progesterone enhanced the secretion of FSH and
LH, respectively, from cultured pituitary cells. Moreover, in-vitro produced FSH
increased ovarian size, serum FSH and LH and stimulated ovarian activity, while
in-vitro produced LH neither increased ovarian size nor stimulated ovarian
activity.