What question did this study set out to answer?

To determine whether nitric oxide synthase is present in human ovarian follicular cells and examine how nitric oxide regulates granulosa-luteal cell steroidogenesis.

November 1, 1994Endocrinology

Nitric oxide: an autocrine regulator of human granulosa-luteal cell steroidogenesis.

View Full Paper

Ask AI

Bookmark

To determine whether nitric oxide synthase is present in human ovarian follicular cells and examine how nitric oxide regulates granulosa-luteal cell steroidogenesis.
Analyzed ovarian follicular cells from women undergoing in vitro fertilization using reverse transcription-polymerase chain reaction for endothelial NO synthase mRNA and immunocytochemistry for protein localization.
Assayed NO synthase functional activity by measuring conversion of L-arginine to citrulline.
Treated cultured granulosa-luteal cells with NO synthase inhibitors, NO donors, cGMP analogs, and hemoglobin to evaluate hormone secretion and aromatase activity.
Endothelial NO synthase mRNA and protein were identified and confirmed to be catalytically active within human granulosa-luteal cells.
Selective NO synthase inhibitors significantly increased estradiol secretion, while NO donors caused a dose-dependent reduction in both estradiol and progesterone secretion.
NO donors and native NO directly inhibited cellular and microsomal aromatase activity independently of cGMP pathways, an effect reversed by the NO scavenger hemoglobin.

Discussion

No takes yet. Share an insight, caveat, or question.

Implication

Experimental laboratory study demonstrates nitric oxide inhibits steroid hormone secretion in human ovarian cells, suggesting an autocrine regulatory role in follicular steroidogenesis.

Cite This Study

Voorhis et al. (1994) studied this question.

synapsesocial.com/papers/6a83cb4cac97fff8746a98d7 https://doi.org/10.1210/endo.135.5.7525252

View Full Paper

Ask AI

Bookmark

Implication

Experimental laboratory study demonstrates nitric oxide inhibits steroid hormone secretion in human ovarian cells, suggesting an autocrine regulatory role in follicular steroidogenesis.

Nitric oxide: an autocrine regulator of human granulosa-luteal cell steroidogenesis.

Key Points

Discussion

Implication

Cite This Study

Nitric oxide: an autocrine regulator of human granulosa-luteal cell steroidogenesis.

Key Points

Discussion

Implication

Cite This Study

Also Consider

Also Consider