theca folliculi

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theca folliculi

[′thē·kə fə′lik·yə·lī]
(histology)
The capsule surrounding a developing or mature Graafian follicle; consists of two layers, theca interna and theca externa.
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In vitro studies have shown the ability of pro-inflammatory stimuli to upregulate the steroidogenic enzyme responsible for androgen production in ovarian theca cells (28).
Increased transcription and increased messenger ribonucleic acid (mRNA) stability contribute to increased GATA6 mRNA abundance in polycystic ovary syndrome theca cells.
Putative activation of the peroxisome proliferator-activated receptor gamma impairs androgen and enhances progesterone biosynthesis in primary cultures of porcine theca cells.
After incubation, the theca cells were stored at -20[degrees]C.
Insulin-sensitizers have a positive effect in PCOS patients through normalization of hyperinsulinaemia that otherwise amplifies the excessive androgen production from the ovary theca cells via CYP17 phosphorylation and lower levels of SHBG.
In addition, there was no significant difference between COCs of small and large antral follicles, but mural granulosa cell / theca cell complexes from large antral follicles had higher levels of mRNA for inhibin-[beta]A subunit than those from small antral follicles (P < 0.
Rare theca cells were seen scattered in between the neoplastic granulosa cells.
3Rd, Guffey TA, Malkasian GD et al: Clinicopathologic review of 118 granulosa and 82 theca cell tumours.
In relation, the ES decline in S3 suggested that sub-chronic exposure could disrupt the ES synthesis of theca cells in the ovarian follicles, and the following increase in S4 and S5 confirmed that ES production improved during the recovery period.
Angiotensin II reverses the inhibitory action produced by theca cells on bovine oocyte nuclear maturation.
Recent studies showed that hyperandrogenism may also be due to local inflammatory response of ovarian theca cells to reactive oxygen species [33] or to cytokines and chemokines produced by dysfunctional adipose tissue [34].