Tuesday, June 14, 2011

Bee Pollen Boosts Release of Insulin-Like Growth Factor I

The Effect of Bee Pollen on Secretion Activity, Markers of Proliferation and Apoptosis of Porcine Ovarian Granulosa Cells in vitro
Journal of Environmental Science and Health, Part B: Pesticides, Food Contaminants, and Agricultural Wastes, Volume 46, Issue 3, 2011, Pages 207 - 212

The general objective of this in vitro study was to examine the effect of bee pollen on the release of insulin-like growth factor I (IGF-I) and steroid hormone progesterone, and expression of markers of proliferation (PCNA) and apoptosis (caspase-3) in porcine ovarian granulosa cells.

Concentrations of IGF-I and progesterone were determined by RIA method and expression of PCNA and caspase-3 by immunocytochemistry. Bee pollen addition at the dose of 10 ng/mL significantly inhibited IGF-I release by porcine ovarian granulosa cells.

This growth factor was not influenced by 100 and 1000 ng/mL doses of bee pollen. Progesterone release by cells was not influenced by bee pollen addition at the doses of 10, 100 and 1000 ng/mL as used in our study. Similarly expression of PCNA and caspase-3 was not affected by bee pollen addition.

The present study shows dose-dependent regulation of IGF-I by experimental bee pollen addition in vitro. Progesterone release, expression of PCNA and caspase-3 in porcine ovarian granulosa cells was not induced by pollen.

Our results contribute to new insights regarding the possible effect of bee pollen on IGF-I release, which is important for regulation of porcine ovarian functions.

No comments: