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https://www.readbyqxmd.com/read/28535841/the-epigenetic-effects-of-assisted-reproductive-technologies-ethical-considerations
#1
M-C Roy, C Dupras, V Ravitsky
The use of assisted reproductive technologies (ART) has increased significantly, allowing many coping with infertility to conceive. However, an emerging body of evidence suggests that ART could carry epigenetic risks for those conceived through the use of these technologies. In accordance with the Developmental Origins of Health and Disease hypothesis, ART could increase the risk of developing late-onset diseases through epigenetic mechanisms, as superovulation, fertilization methods and embryo culture could impair the embryo's epigenetic reprogramming...
May 24, 2017: Journal of Developmental Origins of Health and Disease
https://www.readbyqxmd.com/read/28521851/regulation-of-interleukin-11-expression-in-ovulatory-follicles-of-the-rat-ovary
#2
You-Jee Jang, You-Jee Jang, Jae-Il Park, Jae-Il Park, Seong-Eun Jeong, Seong-Eun Jeong, You-Mi Seo, You-Mi Seo, Phuong T M Dam, Phuong T M Dam, Young-Woo Seo, Young-Woo Seo, Bum-Chae Choi, Bum-Chae Choi, Sang-Jin Song, Sang-Jin Song, Sang-Young Chun, Sang-Young Chun, Moon-Kyoung Cho, Moon-Kyoung Cho
The aim of the present study was to examine the regulation of interleukin (IL)-11 expression, as well as the role of IL-11, during ovulation in gonadotropin-primed immature rats. Injection of equine chorionic gonadotropin (eCG), followed by human CG (hCG) to induce superovulation stimulated expression of the Il11 gene in theca cells within 6h, as revealed by northern blot and in situ hybridisation analyses. Real-time reverse transcription-polymerase chain reaction analysis showed that the IL-11 receptor, α subunit gene was expressed in granulosa and theca cells and that injection of hCG had no effect on its expression...
May 19, 2017: Reproduction, Fertility, and Development
https://www.readbyqxmd.com/read/28460674/effect-of-extending-fsh-treatment-on-superovulation-and-embryo-production-in-wood-bison-bison-bison-athabascae
#3
J Manuel Palomino, Miriam P Cervantes, Reuben J Mapletoft, Murray R Woodbury, Gregg P Adams
The effect of extending the length of the FSH treatment protocol on superovulatory response and embryo production was investigated in wood bison during the anovulatory and ovulatory seasons. In Experiment 1 (anovulatory season), follicular wave emergence was synchronized by follicular ablation (Day -1) and bison were assigned randomly to two groups (n = 14/group) and given 200 mg FSH on Day 0 and Day 2 (non-extended group), or 133 mg FSH on Days 0, 2, and 4 (extended group). Human chorionic gonadotropin (hCG; 3000 IU) was given on Day 5 and Day 6 in the non-extended and extended groups, respectively, and bison were inseminated 12 and 24 h later...
June 2017: Theriogenology
https://www.readbyqxmd.com/read/28456001/high-milking-sheep-have-a-lower-ovulation-rate-and-tend-to-yield-fewer-embryos-in-response-to-superovulation-and-intrauterine-artificial-insemination
#4
A Meraï, M Dattena, S Casu, M Rekik, N Lassoued
Antagonistic relationship between milk yield and reproduction is reported in several livestock species. This study aimed to investigate whether genetic merit for milk production in dairy sheep affects responses to superovulation, embryo yield and quality. A total of 21 cross-bred Sarda x Lacaune ewes homogeneous for age, parity and stage of lactation were included. The ewes were stratified as high-producing or low-producing based on their genetic merit for milk production estimated by a pentatrait repeatability animal model...
April 29, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28438565/improvements-in-oocyte-competence-in-superovulated-mice-following-treatment-with-cilostazol-ovulation-of-immature-oocytes-with-high-developmental-rates
#5
Ahmed M Taiyeb, Saeeda A Muhsen-Alanssari, William L Dees, Jill Hiney, Michael E Kjelland, Duane C Kraemer, Mundhir T Ridha-Albarzanchi
Exogenous administration of superovulatory hormones negatively affects oocyte competence in mammals. Phosphodiesterase 3A inhibitors were found to improve competence of oocytes matured in vitro in several species, including humans. This study was therefore designed to define oocyte maturation synchronization and competence, in vivo, using superovulated mice treated with cilostazol, a selective phosphodiesterase 3A inhibitor. Swiss Webster mice were superovulated and treated orally with 7.5mg cilostazol once or twice to result in ovulation of immature oocytes at the metaphase I (MI) or germinal vesicle (GV) stage, respectively...
April 22, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/28424461/a-lack-of-coordination-between-sister-chromatids-segregation-and-cytokinesis-in-the-oocytes-of-b6-y-tir-xy-sex-reversed-female-mice
#6
Jia-Qiao Zhu, Seang Lin Tan, Teruko Taketo
The B6.Y(TIR) (XY) mouse develops bilateral ovaries despite the expression of the testis-determining gene Sry during gonadal differentiation. We reported that the oocytes of the XY female are defective in their cytoplasm, resulting in a failure in the second meiotic division after activation or fertilization in vitro. However, the mechanism of meiotic failure or the cause of infertility remained to be clarified. In the present study, we obtained mature oocytes from XY females by superovulation and confirmed that these oocytes also fail in zygotic development...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28419839/near-infrared-laser-irradiation-improves-the-development-of-mouse-pre-implantation-embryos
#7
Masaki Yokoo, Miho Mori
The aim of the present study was to assess the effects of near-infrared laser irradiation on the in vitro development of mouse embryos. Female ICR mice were superovulated with pregnant mare serum gonadotropin and human chorionic gonadotropin (hCG), and mated with male mice. Two-cell stage embryos were collected 40 h after administering hCG and cultured in M16 medium. Two-cell embryos (0 h after culture), 8-cell embryos (approx. 30 h after culture), morula (approx. 48 h after culture), and blastocysts (approx...
April 15, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28407855/corrigendum-to-reducing-treatments-in-cattle-superovulation-protocols-by-combining-a-pituitary-extract-with-a-5-hyaluronan-solution-is-it-able-to-diminish-activation-of-the-hypothalamic-pituitary-adrenal-axis-compared-to-the-traditional-protocol-theriogenology
#8
Andrea Biancucci, Tatiana Sbaragli, Antonella Comin, Lakamy Sylla, Maurizio Monaci, Tanja Peric, Giuseppe Stradaioli
No abstract text is available yet for this article.
May 2017: Theriogenology
https://www.readbyqxmd.com/read/28407853/effects-of-environmental-enrichment-on-reproductive-performance-and-quantity-and-morphology-of-cumulus-oocyte-complexes-obtained-from-rattus-norvegicus
#9
Joana Fisch, Iáskara Vieira de Oliveira, Juliana Fank, Lia Mara Gomes Paim, Marília Remuzzi Zandoná, Eliana Franco Lopes, Fernanda Bastos de Mello, Alexandre Tavares Duarte de Oliveira
Several researchers have observed that environmental enrichment (EE) can be effective in reducing stressful conditions and abnormal behavior and may provide better reproductive performance in rodents. In this context, this study aimed to evaluate the reproductive performance of Wistar rats reared in three different housing conditions. Animals were separated into breeding pairs, one pair per cage and pairs randomly assigned to three experimental groups (ten couples per group): control group were provided cages without any environmental enrichment; PVC group with PVC pipe; and cardboard roll group with a commercially available cardboard tube...
May 2017: Theriogenology
https://www.readbyqxmd.com/read/28407512/impact-of-large-ovarian-endometriomas-on-the-response-to-superovulation-for-in-vitro-fertilization-a-retrospective-study
#10
Simone Ferrero, Carolina Scala, Emanuela Tafi, Annalisa Racca, Pier Luigi Venturini, Umberto Leone Roberti Maggiore
OBJECTIVE: To assess the response to superovulation for in vitro fertilization (IVF) in patients with unilateral endometriomas with diameter ≥5cm and in the contralateral healthy ovary. STUDY DESIGN: This retrospective analysis of a prospectively collected database included patients who underwent superovulation for IVF/ICSI cycles and had unoperated single unilateral endometrioma with diameter ≥5cm and healthy contralateral ovary. The primary outcome of the study was to compare the number of oocyte retrieved in the ovary with the endometrioma and the contralateral healthy ovary...
April 2, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
https://www.readbyqxmd.com/read/28407051/igf1r-expression-in-ovarian-granulosa-cells-is-essential-for-steroidogenesis-follicle-survival-and-fertility-in-female-mice
#11
Sarah C Baumgarten, Marah Armouti, CheMyong Ko, Carlos Stocco
Folliculogenesis is a lengthy process that requires the proliferation and differentiation of granulosa cells (GCs) for preovulatory follicle formation. The most crucial endocrine factor involved in this process is follicle-stimulating hormone (FSH). Interestingly, previous in vitro studies indicated that FSH fails to stimulate GC proliferation in the absence of the insulin-like growth factor 1 receptor (IGF1R). To determine the role of the IGF1R in vivo, female mice with a conditional knockdown of the IGF1R in the GCs were produced and had undetectable levels of IGF1R mRNA and protein in the GCs...
April 12, 2017: Endocrinology
https://www.readbyqxmd.com/read/28397811/a-novel-action-of-follicle-stimulating-hormone-in-the-ovary-promotes-estradiol-production-without-inducing-excessive-follicular-growth-before-puberty
#12
Charlotte M François, Florence Petit, Frank Giton, Alain Gougeon, Célia Ravel, Solange Magre, Joëlle Cohen-Tannoudji, Céline J Guigon
In cyclic females, FSH stimulates ovarian estradiol (E2) production and follicular growth up to the terminal stage. A transient elevation in circulating FSH and E2 levels occurs shortly after birth. But what could be the action of FSH on the ovary during this period, and in particular how it stimulates ovarian steroidogenesis without supporting terminal follicular maturation is intriguing. By experimentally manipulating FSH levels, we demonstrate in mice that the mid-infantile elevation in FSH is mandatory for E2 production by the immature ovary, but that it does not stimulate follicle growth...
April 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28396487/culture-time-of-vitrified-warmed-zygotes-before-microinjection-affects-the-production-efficiency-of-crispr-cas9-mediated-knock-in-mice
#13
Yoshiko Nakagawa, Tetsushi Sakuma, Norihisa Nishimichi, Yasuyuki Yokosaki, Toru Takeo, Naomi Nakagata, Takashi Yamamoto
Robust reproductive engineering techniques are required for the efficient and rapid production of genetically modified mice. We have reported the efficient production of genome-edited mice using reproductive engineering techniques, such as ultra-superovulation, in vitro fertilization (IVF) and vitrification/warming of zygotes. We usually use vitrified/warmed fertilized oocytes created by IVF for microinjection because of work efficiency and flexible scheduling. Here, we investigated whether the culture time of zygotes before microinjection influences the efficiency of producing knock-in mice...
May 15, 2017: Biology Open
https://www.readbyqxmd.com/read/28389047/effects-of-ecg-and-progesterone-on-superovulation-and-embryo-production-in-wood-bison-bison-bison-athabascae
#14
J Manuel Palomino, Miriam P Cervantes, Murray R Woodbury, Reuben J Mapletoft, Gregg P Adams
Experiments were done to determine if inclusion of eCG and progesterone in the superstimulation protocol will increase the ovarian response and embryo production in wood bison, and to provide preliminary information regarding the effect of season. In Experiment 1 (anovulatory season), bison (n=26) were synchronized by follicular ablation (Day -1) and given FSH on Days 0 and 2, and assigned to 3 groups: Progesterone (Days 0-4), eCG (Day 3), or progesterone+eCG. On Day 5, bison were given hCG and inseminated 12 and 24h later...
March 29, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28381082/embryo-transfer-a-review-of-timing-and-techniques
#15
Pietro Bortoletto, Jennifer Bakkensen, Raymond M Anchan
Since the first successful human in vitro fertilization (IVF) pregnancy nearly 40 years ago, remarkable progress has been made in assisted reproductive technology (ART). Improvements in oocyte retrieval, embryo culture, genetic screening, and embryo selection have contributed to dramatic improvements in IVF outcomes. A more robust understanding of embryologic development has driven innovation in not only the timing of embryo transfer but also the number of embryos to transfer. Additionally, overcoming the technical hurdle of embryo vitrification has given both physicians and patients several benefits including the flexibility to mitigate effects of superovulation on the endometrium, limit the number of embryos transferred, afforded an opportunity to screen the quality of embryos both by evaluating in vitro development as well as preimplantation genetic testing...
April 4, 2017: Minerva Endocrinologica
https://www.readbyqxmd.com/read/28360101/phospholipase-c-related-but-catalytically-inactive-proteins-regulate-ovarian-follicle-development
#16
Miho Matsuda, Masato Hirata
Phospholipase C-related but catalytically inactive proteins PRIP-1 and -2 are inositol-1,4,5-trisphosphate binding proteins that are encoded by independent genes. Ablation of the Prip genes in mice impairs female fertility, which is manifested by fewer pregnancies, a decreased number of pups, and the decreased and increased secretion of gonadal steroids and gonadotropins, respectively. We investigated the involvement of the PRIPs in fertility, focusing on the ovaries of Prip-1 and -2 double-knock-out (DKO) mice...
May 19, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28356501/anti-m%C3%A3-llerian-hormone-amh-and-fertility-management-in-agricultural-species
#17
Francesca Mossa, Fermin Jimenez-Krassel, Danielle M Scheetz, Miriam Weber-Nielsen, Alexander C O Evans, Jim Ireland
A reliable, easy to assess marker for fertility in agricultural species would be highly desirable and Anti-Müllerian Hormone (AMH) is a promising candidate. This review summarizes recent findings concerning AMH and its role in fertility management, mainly in cattle. It focuses on: 1) alterations in circulating AMH concentrations from birth to puberty and during estrous cycles; 2) correlation of circulating AMH concentrations with ovarian follicle numbers and ovarian reserve; 3) factors that impact circulating AMH concentrations; 4) use of AMH as a predictor of fertility...
March 29, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28339861/constitutive-luteinizing-hormone-receptor-signaling-causes-sexual-dysfunction-and-leydig-cell-adenomas-in-male-mice1
#18
Lan Hai, Deepak S Hiremath, Marilène Paquet, Prema Narayan
The luteinizing hormone receptor (LHCGR) is necessary for fertility and genetic mutations cause defects in reproductive development and function. Activating mutations in LHCGR cause familial male limited precocious puberty (FMPP). We have previously characterized a mouse model (KiLHRD582G) for FMPP that exhibits the same phenotype of precocious puberty, Leydig cell hyperplasia and elevated testosterone as boys with the disorder. We observed that KiLHRD582G male mice became infertile by 6 months of age although sperm count and motility were normal...
February 17, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28327456/relationship-between-plasma-anti-m%C3%A3-llerian-hormone-concentrations-during-the-rearing-period-and-subsequent-embryo-productivity-in-japanese-black-cattle
#19
H Nabenishi, G Kitahara, S Takagi, A Yamazaki, T Osawa
To use plasma anti-Müllerian hormone (AMH) concentrations as early-stage markers for donor cow selection, we investigated the relationship between plasma AMH concentrations in Japanese black heifers and subsequent embryo productivity following superovulation treatment. Plasma AMH and nonesterified fatty acid (NEFA) concentrations in 6 heifers were evaluated once per month from 3 mo before successful AI for primiparity to 3 mo postpartum. Following calving, embryo collection by superovulation treatment was performed at 3- to 4-mo intervals...
February 4, 2017: Domestic Animal Endocrinology
https://www.readbyqxmd.com/read/28288431/non-art-pregnancy-predictive-factors-in-infertile-patients-with-peritoneal-superficial-endometriosis
#20
J Boujenah, I Cedrin-Durnerin, C Herbemont, C Sifer, C Poncelet
OBJECTIVE: To study the predictive factors for non-ART pregnancy in infertile women after laparoscopic diagnosis and surgery for isolated superficial peritoneal endometriosis (SUP). STUDY DESIGN: Retrospective observational study from January-2004 to December-2015 in a tertiary care university hospital and Assisted Reproductive Technology (ART) centre. Infertile women with laparoscopic surgery for SUP (with histologic diagnosis) were included. The surgical treatment was followed by spontaneous fertility or post-operative ovarian stimulation (pOS) using superovulation (gonadotrophins)±Intra Uterine Insemination (IUI)...
March 7, 2017: European Journal of Obstetrics, Gynecology, and Reproductive Biology
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