CYP2C76 deficiency is embryonic lethal in cynomolgus macaques: The potential role of CYP2C76 in early embryogenesis.

Cynomolgus macaques are an important primate species for drug metabolism studies; however cynomolgus CYP2C76, an important drug-metabolizing enzyme, accounts for drug metabolism differences to humans, so that CYP2C76-null animals might show drug-metabolizing properties more similar to humans. In this study, attempts were made to produce CYP2C76-null animals by assisted reproduction technology. Oocytes and sperm collected from the heterozygotes for the null allele (c.

Pregnancy following ovarian induction in a patient with premature ovarian failure and undetectable serum anti-Müllerian hormone.

We report the first case, to the best of our knowledge, of successful conception following ovarian induction in a patient with premature ovarian failure and undetectable serum anti-Müllerian hormone. A 34-year-old woman was referred because of ovarian amenorrhea. After endogenous gonadotrophins were normalized by hormone-replacement therapy and gonadotrophin-releasing hormone agonist, ovarian induction was performed using exogenous gonadotrophins.

The significance of laparoscopy in determining the optimal management plan for infertile patients with suspected tubal pathology revealed by hysterosalpingography.

The fallopian tube has numerous functions, including ovum pick-up, the place of fertilization of the ovum and cleavage of the embryo, and transfer of the embryo to the uterus. Tubal pathology impairs functions of the fallopian tube and reduces fertility. The degree of tubal pathology determines the possibility for fertility.

Evaluation of parametrial spread in endometrial carcinoma.

Objective: To evaluate the detailed clinicopathologic characteristics of parametrial spread in uterine endometrial cancer.

Methods: We retrospectively identified 334 individuals with uterine endometrial cancer who had undergone radical hysterectomy between 1988 and 2007. Parametrial spread was determined by histopathological analysis of surgically resected specimens.

A change in promoter methylation of hMLH1 is a cause of acquired resistance to platinum-based chemotherapy in epithelial ovarian cancer.

Background: Acquired resistance to platinum-based chemotherapy (Pt-chemo) is a major problem for improving the prognosis for patients with advanced epithelial ovarian cancer (EOC). However, the molecular mechanism of acquired resistance to Pt-chemo is not well understood.

Materials And Methods: hMLH1 promoter methylation (hMLH1 MET) and hMLH1 protein expression was examined in 36 paired samples of primary and secondary resected tumors by methylation-specific polymerase chain reaction (PCR).

Primate embryonic stem cells proceed to early gametogenesis in vitro.

Embryonic stem cells (ESCs) of nonhuman primates are important for research into human gametogenesis because of similarities between the embryos and fetuses of nonhuman primates and those of humans. Recently, the formation of germ cells from mouse ESCs in vitro has been reported. In this study, we established cynomolgus monkey ES cell lines (cyESCs) and attempted to induce their differentiation into germ cells to obtain further information on the development of primate germ cells by observing the markers specific to germ cells.

Microtubule organization during rabbit fertilization by intracytoplasmic sperm injection with and without sperm centrosome.

In most mammalian fertilization, the sperm introduces the centrosome, which acts as a microtubule organizing center (MTOC) and is essential for pronuclear movement. In rabbit fertilization, biparental centrosomal contribution in microtubule organization has been suggested. To reveal the function and inheritance of the centrosome during rabbit fertilization, we compared microtubule organization and early embryonal development following intracytoplasmic sperm injection (ICSI) with and without sperm centrosome.

Activation with ethanol improves embryo development of ICSI-derived oocytes by regulation of kinetics of MPF activity.

Developmental potential of bovine embryos that are not artificially activated after intracytoplasmic sperm injection (ICSI) is generally very low. In this study, we investigated effects of artificial activation with ethanol on kinetics of maturation promoting factor (MPF) activity (p34(cdc2) kinase activity) and development of bovine oocytes following ICSI. Treatment of oocytes with ethanol at 4 h after ICSI improved their first cleavage and further preimplantation development (51% vs.