+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The fate of thecal smooth muscle cells in postovulatory hamster follicles

, : The fate of thecal smooth muscle cells in postovulatory hamster follicles. Anatomical Record 207(2): 267-277

Smooth muscles cells (SMC) have been identified in the theca externa of preovulatory follicles in several mammals. The function of these cells is not clear. It has been suggested that they are involved in ovulation and may play a role in the collapse of ruptured follicles and their transformation into corpora lutea (CL). In this study we used transmission electron microscopy (TEM) to examine the ultrastructure of SMC at the base of hamster follicles during the formation and regression of CL. For the first three days following ovulation, the CL are surrounded by a distinct theca externa composed of 1-3 layers of spindle-shaped cells. The cells were identified as SMC by the masses of filaments in the cytoplasm, dense attachment plaques and caveolae along the plasma membrane and an external lamina surrounding each cell. On the fourth day after ovulation, the theca externa is fragmented and TEM observations suggest the following three fates for theca externa cells: 1) many cells degenerate, 2) some cells persist as SMC, 3) some cells possess few or no filaments and appear similar to fibroblasts. The significance of these results is discussed in regard to ovarian contractions, the fate of CL, and the recycling of ovarian tissues.


PMID: 6650861

DOI: 10.1002/ar.1092070205

Other references

McCollin, D., 2001: Avian distribution patterns in north Humberside woodlands the role of habitat and landscape-scale factors revisited. Unknown

Scroyen, I.; Cosemans, L.; Lijnen, H.Roger., 2010: Effect of tissue inhibitor of matrix metalloproteinases-1 on in vitro and in vivo adipocyte differentiation. Matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) play a role in development of obesity by contributing to adipogenesis, angiogenesis and extracellular matrix degradation. We have evaluated a potential functional role of TIMP-1,...

Tantini, Luciano., 1963: Utilization of peasant houses in relation to the present situation of Italian agriculture. The problem of how to use abandoned peasant buildings is directly linked to rural exodus. This article refers to an investigation which was limited to two typical communes in Tuscany. Changes in farm size will allow only partial utilization and ad...

Kharitonova, O.; Volkov, D., 1976: The condition of forms of calcium and magnesium compounds in the blood plasma of hens within individual periods of egg laying and the effect of different levels of microelements. Biulleten' Vsesoiuznogo nauchno issledovatel'skogo instituta fiziologii biokhimii i pitaniia sel'skokhoziaistvennykh zhivotnykh: (41) 54-56

Yao, M.; Fabbi, M.; Hayashi, H.; Park, N.; Attala, K.; Gu, G.; French, M.A.; Driver, V.R., 2015: A retrospective cohort study evaluating efficacy in high-risk patients with chronic lower extremity ulcers treated with negative pressure wound therapy. The purpose of this study was to evaluate the efficacy of negative pressure wound therapy (NPWT) compared with standard of care on wound healing in high-risk patients with multiple significant comorbidities and chronic lower extremity ulcers (LEUs...

Brenchley, J.M.; Douek, D.C., 2012: Microbial translocation across the GI tract. The lumen of the gastrointestinal (GI) tract is home to an enormous quantity of different bacterial species, our microbiota, that thrive in an often symbiotic relationship with the host. Given that the healthy host must regulate contact between th...

Nakane, Akinobu, 1993: Effects of lipopolysaccharides purified from strains isolated from infected root canals on human dental pulp cells, human periodontal ligament cells and murine calvarial bone. Examination was made of the effects of lipopolysaccharides (LPS) on human dental pulp (DP) cells, human periodontal ligament (PL) cells and murine calvarial bone. LPS purified from strains such as Porphyromonas gingivalis, Porphyromonas endodontal...

Heidrich, J.H.; Boguschewski, F.B.; Niemeier, A.N.; Seyfarth, M.S., 1999: Evaluation of ion-selective electrodes for continuous on-line measurements of electrolytes in blood. Clinical Chemistry & Laboratory Medicine 37(SPEC SUPPL ): S386, June

Damodaran K.T.; Somasekar B., 1976: Chrome chlorite (kotschubeite) from the Nuggihalli schist belt. Clays and Clay Minerals 24(1): 31-35

Foerster, W.; Sziegoleit, W.; Guhlke, I., 1964: On The Question Of The Therapeutic Range Of Pentaacetylgitoxin (Pentagit). Das Deutsche Gesundheitswesen 19: 1649-1651