BMP‐6 and SMAD4 gene expression is altered in cumulus cells from women with endometriosis‐associated infertility

2020 ◽  
Author(s):  
Emily De Conto ◽  
Ursula Matte ◽  
João Sabino Cunha‐Filho
Keyword(s):  
Gene Expression ◽  
Cumulus Cells ◽  
Smad4 Gene

scholarly journals Heat Shock Protein 70 Improves In Vitro Embryo Yield and Quality from Heat Stressed Bovine Oocytes

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1794
Author(s):  
Konstantina Stamperna ◽  
Themistoklis Giannoulis ◽  
Eleni Dovolou ◽  
Maria Kalemkeridou ◽  
Ioannis Nanas ◽  
...  
Keyword(s):  
Gene Expression ◽  
Heat Shock ◽  
Heat Shock Protein ◽  
Heat Shock Protein 70 ◽  
Cumulus Cells ◽  
Intramolecular Interactions ◽  
Developmental Competence ◽  
Embryo Yield ◽  
Bovine Oocytes

Heat shock protein 70 (HSP70) is a chaperon that stabilizes unfolded or partially folded proteins, preventing inappropriate inter- and intramolecular interactions. Here, we examined the developmental competence of in vitro matured oocytes exposed to heat stress with or without HSP70. Bovine oocytes were matured for 24 h at 39 °C without (group C39) or with HSP70 (group H39) and at 41 °C for the first 6 h, followed by 16 h at 39 °C with (group H41) or without HSP70 (group C41). After insemination, zygotes were cultured for 9 days at 39 °C. Cleavage and embryo yield were assessed 48 h post insemination and on days 7, 8, 9, respectively. Gene expression was assessed by RT-PCR in oocytes, cumulus cells and blastocysts. In C41, blastocysts formation rate was lower than in C39 and on day 9 it was lower than in H41. In oocytes, HSP70 enhanced the expression of three HSP genes regardless of incubation temperature. HSP70 at 39 °C led to tight coordination of gene expression in oocytes and blastocysts, but not in cumulus cells. Our results imply that HSP70, by preventing apoptosis, supporting signal transduction, and increasing antioxidant protection of the embryo, protects heat stressed maturing bovine oocyte and restores its developmental competence.

scholarly journals Localization and gene expression of steroid sulfatase by RT-PCR in cumulus cells and relationship to serum FSH levels observed during in vitro fertilization

2005 ◽  
Vol 2 (1) ◽  
Author(s):  
Yukiko Otsuka ◽  
Atsushi Yanaihara ◽  
Shinji Iwasaki ◽  
Junichi Hasegawa ◽  
Takumi Yanaihara ◽  
...  
Keyword(s):  
Gene Expression ◽  
In Vitro Fertilization ◽  
Cumulus Cells ◽  
Steroid Sulfatase ◽  
Rt Pcr ◽  
Vitro Fertilization

scholarly journals Investigating the Intrafollicular Factors Affecting Oocyte Developmental Competency

2021 ◽  
Author(s):  
◽  
Zaramasina Clark
Keyword(s):  
Gene Expression ◽  
Oocyte Maturation ◽  
Granulosa Cells ◽  
Embryo Quality ◽  
Cumulus Cells ◽  
Significant Finding ◽  
High Quality ◽  
Final Maturation

<p>The number of cycles of assisted reproductive technologies (ART) performed increased by ~9.5 % globally between 2008 and 2010. In spite of this, the success rate in terms of delivery was only ~19.0 % (Dyer et al., 2016). This discrepancy between the demand for, and success of, these technologies necessitates the development of tools to improve ART efficiency. To facilitate this, a better understanding of how the microenvironment changes within the developing follicle to culminate in a mature, developmentally-competent oocyte is required. This study employed an in vivo and in vitro ovine model to investigate the relationship between the surrounding microenvironment and oocyte maturation, and in particular, the attainment of oocyte developmental competency and high-quality embryos.  The first objective of this PhD study was to comprehensively investigate the changing microenvironment of in vivo matured, presumptive preovulatory (PPOV) follicles from wild-type (++) and high ovulation rate (OR; I+B+) ewes. The high OR ewes were heterozygous carriers of mutations in BMP15 (I+) and BMPRIB (B+). Functional differences in follicular somatic (granulosa and cumulus) cells between these genotypes, including differential gonadotropin responsiveness of granulosa cells, composition of follicular fluid and gene expression profiles in cumulus cells were evident. These differences emerged as part of a compensatory mechanism by which oocytes from smaller follicles, containing fewer granulosa cells, achieved developmental competency in I+B+ ewes.  The second objective of this PhD study was to develop new approaches for improving current in vitro maturation (IVM) strategies. The first approach utilised in this study focused on developing biomarkers that could be used to improve prediction of developmental competency in oocytes and in vitro produced embryos. This involved interrogating the hypothesis that a combination of molecular and morphokinetic biomarkers would better predict the developmental competency of oocytes and embryos compared to using these biomarkers alone. The second approach utilised in this PhD study tested the effects of modulating IVM conditions to better mimic the follicular microenvironment of a high, compared to a low, OR species on oocyte developmental competency and embryo quality. This involved supplementing IVM media with different ratios of two oocyte-secreted growth factors, i.e. GDF9:BMP15, that were representative of low or high OR species. These approaches demonstrated significant potential and warrant further investigation.  The most significant finding of this study was that despite variances in the surrounding microenvironment during in vivo and in vitro oocyte maturation that culminated in differential gene expression patterns in cumulus cells, and divergent gonadotropin-responsiveness of granulosa cells, the gene expression signatures of developmentally-competent oocytes and the morphokinetics of high-quality embryos were unaltered. This confirms the value of developing such biomarkers for oocyte development competency and embryo quality that remain unaltered despite a changing surrounding environment. Interestingly, simulating the ratio of GDF9:BMP15 that oocytes from high OR species are exposed to during maturation improved developmental competency in oocytes as demonstrated by increased blastocyst rates. Furthermore, this study has demonstrated that combinations of molecular (cumulus cell gene expression) and morphokinetic biomarkers improved the ability to predict developmental competency in oocytes and embryos. Overall, this study revealed novel information regarding the follicular microenvironment during final maturation and identified several novel approaches to improving the efficiency of ART.</p>

scholarly journals Decrease of Smad4 gene expression in patients with essential thrombocythaemia may cause an escape from suppression of megakaryopoiesis by transforming growth factor-β 1

2003 ◽  
Vol 124 (2) ◽  
pp. 211-220 ◽  
Author(s):  
Hiroyuki Kuroda ◽  
Takuya Matsunaga ◽  
Takeshi Terui ◽  
Ikuta Tanaka ◽  
Rishu Takimoto ◽  
...  
Keyword(s):  
Gene Expression ◽  
Growth Factor ◽  
Transforming Growth Factor ◽  
Transforming Growth Factor Β ◽  
Essential Thrombocythaemia ◽  
Smad4 Gene

Protein source in maturation media affects gene expression in cumulus cells and embryo development in cattle

2021 ◽  
pp. 1-14
Author(s):  
Nayara Ribeiro Kussano ◽  
Ligiane de Oliveira Leme ◽  
Margot Alves Nunes Dode
Keyword(s):  
Gene Expression ◽  
Embryo Development ◽  
Cumulus Cells ◽  
Protein Source

scholarly journals GDF-9 and BMP-15 mRNA Levels in Canine Cumulus Cells Related to Cumulus Expansion and the Maturation Process

Animals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 462 ◽  
Author(s):  
George Ramirez ◽  
Jaime Palomino ◽  
Karla Aspee ◽  
Monica De los Reyes
Keyword(s):  
Gene Expression ◽  
Estrous Cycle ◽  
Expression Patterns ◽  
Cumulus Cells ◽  
Mrna Levels ◽  
Cumulus Expansion ◽  
Polymerase Chain ◽  
Specific Regulation ◽  
Reproductive Phases

The competence to undergo expansion is a characteristic of cumulus cells (CCs). The aim was to investigate the expression of GDF-9 and BMP-15 mRNA in canine cumulus cells in relation to cumulus expansion and meiotic development over the estrous cycle. CCs were recovered from nonmatured and in vitro-matured (IVM) dog cumulus oocyte complexes (COCs), which were obtained from antral follicles at different phases of the estrous cycle. Quantitative real-time polymerase chain reaction (q-PCR) was used to evaluate the relative abundance of GDF-9 and BMP-15 transcripts from the CCs with or without signs of expansion. The results were evaluated by ANOVA and logistic regression. The maturity of the oocyte and the expansion process affected the mRNA levels in CCs. There were differences (p < 0.05) in GDF-9 and BMP-15 gene expression in CCs isolated from nonmatured COCs when comparing the reproductive phases. Lower mRNA levels (p < 0.05) were observed in anestrus and proestrus in comparison to those in estrus and diestrus. In contrast, when comparing GDF-9 mRNA levels in IVM COCs, no differences were found among the phases of the estrous cycle in expanded and nonexpanded CCs (p < 0.05). However, the highest (p < 0.05) BMP-15 gene expression in CCs that did not undergo expansion was exhibited in anestrus and the lowest (p < 0.05) expression was observed in estrus in expanded CCs. Although the stage of the estrous cycle did not affect the second metaphase (MII )rates, the expanded CCs obtained at estrus coexisted with higher percentages of MII (p < 0.05). In conclusion, the differential expression patterns of GDF-9 and BMP-15 mRNA transcripts might be related to cumulus expansion and maturation processes, suggesting specific regulation and temporal changes in their expression.

scholarly journals Ranking and selection of MII oocytes in human ICSI cycles using gene expression levels from associated cumulus cells

2013 ◽  
Vol 28 (11) ◽  
pp. 2930-2942 ◽  
Author(s):  
J. Ekart ◽  
K. McNatty ◽  
J. Hutton ◽  
J. Pitman
Keyword(s):  
Gene Expression ◽  
Cumulus Cells ◽  
Ranking And Selection ◽  
Expression Levels ◽  
Gene Expression Levels ◽  
Selection Of

Single in vitro bovine embryo production: Coculture with autologous cumulus cells, developmental competence, embryo quality and gene expression profiles

2011 ◽  
Vol 76 (7) ◽  
pp. 1293-1303 ◽  
Author(s):  
I.G.F. Goovaerts ◽  
J.L.M.R. Leroy ◽  
D. Rizos ◽  
P. Bermejo-Alvarez ◽  
A. Gutierrez-Adan ◽  
...  
Keyword(s):  
Gene Expression ◽  
Embryo Quality ◽  
Expression Profiles ◽  
Gene Expression Profiles ◽  
Cumulus Cells ◽  
Developmental Competence ◽  
Bovine Embryo ◽  
Embryo Production
Sign in / Sign up

Export Citation Format

Share Document