Abstract
Data has accumulated suggesting reciprocity between cytokines and the reproductive system. The present study was performed in order to evaluate the correlation between interleukin 1 (IL-1) and tumour necrosis factor (TNF) concentrations in follicular fluid and its oestradiol, progesterone and testosterone levels. A total of 39 follicular fluid samples, from eight patients undergoing in-vitro fertilization and embryo transfer were evaluated. All of the patients were treated by a midluteal (long) protocol involving a gonadotrophin releasing hormone agonist (GnRHa) coupled with follicular phase human menopausal gonadotrophin. Mean levels in follicular fluid of IL-1, TNF, oestradiol, progesterone and testosterone were 1.58 +/- 0.42 fmol/0.1 ml, 4.69 +/- 4.18 pg/ml, 28.5 +/- 58.1 ng/ml, 2360.5 +/- 2846.3 ng/ml and 7.22 +/- 7.08 ng/ml respectively. There was a significant (P less than 0.01) positive correlation between IL-1 and progesterone levels. There was no significant correlation between the different lymphokines and oestradiol secretion, oocyte fertilization, embryo quality and pregnancy rates. It is concluded that IL-1 and TNF exist in follicular fluid. It may be hypothesized that IL-1 has a local regulatory action, possibly promoting luteinization.
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