Search for dissertations about: "oocyte"

Showing result 1 - 5 of 63 swedish dissertations containing the word oocyte.

2. 1. Teleost reproduction: Aspects of Arctic char (Salvelinus alpinus) oocyte growth and maturation

   Author : Håkan Berg; Per-Erik Olsson; Birgitta Norberg; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Zoophysiology; Salmonid; oocyte growth; vitellogenin; vitelline envelope protein; stress; cortisol; oocyte maturation; membrane receptor; Zoofysiologi; Animal physiology; Zoofysiologi; Zoophysiology; zoofysiologi;

   Abstract : In all vertebrate species, reproduction is a hormonally controlled process, important for growth and maturation of gonads and germ cells. Production of functional germ cells is of outmost importance to secure the survival of a species. Fish comprises 50% of the known vertebrates and are found in aquatic habitats all over the world. READ MORE

4. 2. Molecular studies of intra-oocyte phosphatidylinositol 3 kinase (PI3K) signaling pathway in controlling female fertility

   Author : Pradeep Reddy Dubbaka Venu; Kui Liu; Evelyn Telfer; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Primordial follicles; Oocyte; PI3K; Biochemistry; Biokemi; Developmental Biology; miljömedicinsk utvecklingsbiologi;

   Abstract : The primordial follicle pool is the main source of developing follicles in the ovary. The length of reproductive life and the onset of menopause are governed by the amount of primordial follicles in the ovary. READ MORE

5. 3. The functional roles of the intra-oocyte phosphatidylinositol 3-kinase (PI3K) signaling in controlling follicular development in mice

   Author : Krishna Rao Jagarlamudi; Kui Liu; Lena Sahlin; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; oocyte; PI3K signaling; primordial follicle; Obstetrics and gynaecology; Obstetrik och gynekologi; Developmental Biology; miljömedicinsk utvecklingsbiologi;

   Abstract : The key functions of the mammalian ovary are the production of fertilizable oocytes and thesecretion of steroid hormones. At the time of birth the human ovary is composed of basic unitstermed primordial follicles. Primordial follicles are long-lived structures in the ovary and some ofthem last until the woman reaches menopause. READ MORE

6. 4. Genetic and epidemiological aspects of implantation defects : Studies on recurrent miscarriage, preeclampsia and oocyte donation

   Author : Evangelia Elenis; Agneta Skoog Svanberg; Alkistis Skalkidou; Gunilla Sydsjö; Helena Åkerud; Anja Pinborg; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Angiogenesis; genetic polymorphism; gestational hypertensive disorders; Histidine-rich glycoprotein; HRG; implantation defect; oocyte donation; placentation; preeclampsia; recurrent miscarriage; SNP.; Obstetrik och gynekologi; Obstetrics and Gynaecology;

   Abstract : Implantation requires complex molecular and cellular events involving coagulation, angiogenesis and immunological processes that need to be well regulated for a pregnancy to establish and progress normally.  The overall aim of this thesis was to study different models associated with atypical angiogenesis, impaired implantation and/or placentation, such as recurrent miscarriage (RM), oocyte donation (OD) and preeclampsia. READ MORE

7. 5. Studies of phosphatidylinositol 3 kinase (PI3K) signaling pathway in mammalian ovarian follicle activation and development

   Author : Singareddy Rajareddy; Kui Liu; Anneli Stavreus-Evers; Umeå universitet; []
   Keywords : oocyte; follicular development; P13K pathway; medicinsk biokemi; Medical Biochemistry;

   Abstract : The intra-oocyte signaling pathways that control oocyte growth and early follicular development are largely unknown. The aim of this thesis was to investigate the regulation and functions of phosphatidylinositol 3 kinase (PI3K) pathway in the oocyte, focusing in the roles of Foxo3a, p27, and Pten (phosphatase and tensin homolog deleted on chromosome ten). READ MORE