Relationships between concentrations of tumor necrosis factor-alpha and nitric oxide in follicular fluid and oocyte quality

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Follicular fluid nitric oxide levels were higher in endometriosis and hydrosalpinx patients, while TNF-α concentration was linked to poor oocyte quality, though no correlation existed between NO and TNF-α.

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The study measured tumor necrosis factor-α (TNF-α) and nitric oxide (NO) concentrations in 115 follicular fluid samples from 43 women undergoing IVF-ET, and analyzed correlations with oocyte quality and maturity as well as infertility-associated diseases, including endometriosis and hydrosalpinx. The authors found no correlation between NO and TNF-α, and NO levels were significantly higher in patients with endometriosis or hydrosalpinx compared with tubal obstruction alone, while NO did not differ by oocyte maturity or quality. In contrast, TNF-α was significantly higher in poor-quality oocytes, but TNF-α was not associated with infertility-associated diseases (including endometriosis or hydrosalpinx) or with oocyte maturity. The paper reports no significant differences in follicular NO/TNF-α between pregnant and nonpregnant IVF-ET groups, which is a limitation for linking these biomarkers to implantation or pregnancy outcomes. This paper is centrally about endometriosis/hydrosalpinx-related alterations in follicular fluid NO concentrations, with endometriosis explicitly compared as an infertility-associated disease.

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Abstract

PURPOSE: Our objective was to explain a relationship between concentrations of tumor necrosis factor-alpha (TNF-alpha) and nitric oxide (NO) in follicular fluid, oocyte quality, and outcomes of in vitro fertilization--embryo transfer (IVF-ET). METHODS: The concentrations of TNF-alpha and NO were measured in 115 follicular fluid samples collected from 43 patients undergoing IVF-ET program, due to tubal obstruction, some with endometriosis (8 patients) or hydrosalpinx (5 patients). A correlation of these factors concentrations and the oocyte quality, the oocyte maturity, and infertility-associated diseases was analyzed. RESULTS: No correlation was found between concentrations of NO and TNF-alpha in follicular fluid. NO concentrations in follicular fluids were significantly higher in patients with endometriosis (P < 0.001) or hydrosalpinx (P < 0.01) compared to the patients with just tubal obstruction. Follicular NO concentration differences according to oocyte maturity and oocyte quality were not found. In contrast, TNF-alpha concentrations in follicular fluids were significantly higher in poor quality oocytes (P < 0.05) but were not associated with infertility-associated diseases, such as hydrosalphinx or endometriosis,and the oocyte maturity. No significant differences in follicular levels of NO and TNF-alpha as well as IVF-ET parameters of pregnant and nonpregnant groups were revealed. CONCLUSIONS: There is no significant correlation between the concentrations of NO and TNF-alpha in follicular fluid. NO levels in follicular fluid are altered in infertility-associated diseases. However, TNF-alpha levels but not NO levels influence oocyte quality. These results suggest that the production of NO and TNF-alpha in follicular fluid may be regulated via different pathways and can be tempered with infertility-associated diseases, thereby influencing oocyte quality locally.
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Abstract

Purpose: Our objective was to explain a relationshipbetween concentrations of tumor necrosis factor-α (TNF-α)and nitric oxide (NO) in follicular fluid, oocyte quality, andoutcomes of in vitro fertilization=nembryo transfer (IVF-ET).

Methods

The concentrations of TNF-α and NO weremeasured in 115 follicular fluid samples collected from 43patients undergoing IVF-ET program, due to tubalobstruction, some with endometriosis (8 patients) or hydrosalpinx(5 patients). A correlation of these factors concentrationsand the oocyte quality, the oocyte maturity, andinfertility-associated diseases was analyzed.

Results

No correlation was found between concentrationsof NO and TNF-α in follicular fluid. NO concentrations infollicular fluids were significantly higher in patients withendometriosis (P < 0.001) or hydrosalpinx (P < 0.01)compared to the patients with just tubal obstruction. FollicularNO concentration differences according to oocyte maturityand oocyte quality were not found. In contrast, TNF-αconcentrations in follicular fluids were significantly higher inpoor quality oocytes (P < 0.05) but were not associatedwith infertility-associated diseases, such as hydrosalphinxor endometriosis, and the oocyte maturity. No significantdifferences in follicular levels of NO and TNF-α as well asIVF-ET parameters of pregnant and nonpregnant groupswere revealed.

Conclusions

There is no significant correlation betweenthe concentrations of NO and TNF-α in follicular fluid. NOlevels in follicular fluid are altered in infertility-associateddiseases. However, TNF-α levels but not NO levels influenceoocyte quality. These results suggest that the production ofNO and TNF-α in follicular fluid may be regulated viadifferent pathways and can be tempered withinfertility-associated diseases, thereby influencing oocyte qualitylocally. Similar content being viewed by others

References

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J Assist Reprod Genet 17, 222–228 (2000). https://doi.org/10.1023/A:1009495913119 Issue date: DOI: https://doi.org/10.1023/A:1009495913119

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MeSH descriptors

Follicular Fluid Nitric Oxide Oocytes Oocytes Oocytes Oocytes Tumor Necrosis Factor-alpha Adult Adult Embryo Transfer Embryo Transfer Fallopian Tubes Fallopian Tubes Fallopian Tubes Female Female Fertilization in Vitro Fertilization in Vitro Follicular Fluid Follicular Fluid

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