Results 91 to 100 of about 17,633 (227)

Defects in phospholipase C zeta cause polyspermy and low fertilization after conventional IVF: not just ICSI failure

Asian Journal of Andrology
Phospholipase C zeta (PLCζ) is a key sperm-borne oocyte-activating factor that triggers Ca2+ oscillations and the subsequent block to polyspermy following gamete fusion.
Jian-Fang Che, Hui-Xia Wu, Si-Cong Zeng, Yue-Ren Wu, Jing Dai, De-Hua Cheng, Fei Gong, Guang-Xiu Lu, Ge Lin, Can Dai   +9 more
doaj   +1 more source

Iflaviruses in arthropods: when small is mighty

Insect Science, EarlyView.
Many arthropod species harbor iflaviruses, which often cause covert (asymptomatic) infections, but may still affect host fitness. We review the impact of iflaviruses on arthropod fitness, immunity, behaviour as well as the iflavirus’ host range, transmission, tissue tropism and the interactions with other microorganisms within arthropods.
Annamaria Mattia, Hannah‐Isadora Huditz, Monique M. van Oers, Vera I.D. Ros   +3 more
wiley   +1 more source

Evaluation of comparison of clinical outcome treated oocyte with ionomycin and strontium chloride in infertile couple with previous failed in vitro fertilization

Majallah-i Dānishgāh-i ’Ulūm-i Pizishkī-i Shahīd Ṣadūqī Yazd, 2019
Introduction: Several factors are involved in failed fertilization following intracytoplasmic sperm injection (ICSI), which could be related to sperm, oocyte factors and/or both.
Marzieh Norozi- Hafshejani, marzieh Tavalaee, mohammad hossein Nasr- Esfahani   +2 more
doaj  

Cytostatic factor inactivation is induced by a calcium-dependent mechanism present until the second cell cycle in fertilized but not in parthenogenetically activated mouse eggs [PDF]

, 1995
Cytostatic factor (CSF) is an activity responsible for the metaphase II arrest in vertebrate oocytes. This activity maintains a high level of maturation promoting factor (MPF) in the oocyte and both activities are destroyed after fertilization or ...
Ciemerych, Maria A., Kubiak, Jacek Z., Maro, Bernard, Tarkowski, Andrzej K., Zernicka-Goetz, Magdalena   +4 more
core  

Gonadal Development–Related Genes and a Male‐Specific Genetic Marker Identified in the Endangered Sichuan Taimen (Hucho bleekeri)

Integrative Zoology, EarlyView.
Integrated transcriptomic and proteomic analyses were used to validate gonadal development–related genes and to identify a sex‐specific molecular marker in Hucho bleekeri. ABSTRACT Sex determination and differentiation represent fundamental topics in reproductive biology. Sichuan taimen (Hucho bleekeri), a first‐class national protected fish species in
Qinyao Wei, Hua Li, Yeyu Chen, Huanchao Yang, Jun Du, Zhaobin Song   +5 more
wiley   +1 more source

VPS34 Governs Oocyte Developmental Competence by Regulating Mito/Autophagy: A Novel Insight into the Significance of RAB7 Activity and Its Subcellular Location

Advanced Science
Asynchronous nuclear and cytoplasmic maturation in human oocytes is believed to cause morphological anomalies after controlled ovarian hyperstimulation.
Wenwen Liu, Kehan Wang, Yuting Lin, Lu Wang, Xin Jin, Yuexin Qiu, Wenya Sun, Ling Zhang, Yan Sun, Xiaowei Dou, Shiming Luo, Youqiang Su, Qingyuan Sun, Wenpei Xiang, Feiyang Diao, Jing Li   +15 more
doaj   +1 more source

The use of deidentified organ donor testes for research

Andrology, EarlyView.
Abstract Our knowledge of testis development and function mainly comes from research using mammalian model organisms, primarily the mouse. However, there are integral differences between men and other mammalian species regarding cellular composition and expression profiles during fetal and post‐natal testis development and in the mature testis ...
Marina V. Pryzhkova, Marnie W. Skinner, Juliana I. Candelaria, Stephen R. Wellard, Philip W. Jordan   +4 more
wiley   +1 more source

Lower developmental potential of rat zygotes produced by ooplasmic injection of testicular spermatozoa versus cauda epididymal spermatozoa

The Journal of Reproduction and Development
Intracytoplasmic sperm injection (ICSI) is clinically used to treat obstructive/nonobstructive azoospermia. This study compared the efficacy of ICSI with cauda epididymal and testicular sperm in Wistar (WI) and Brown-Norway (BN) rats.
Misuzu IDE, Ibuki SAITO, Makoto SANBO, Mito KANATSU-SHINOHARA, Takashi SHINOHARA, Masumi HIRABAYASHI, Shinichi HOCHI   +6 more
doaj   +1 more source

ARTIFICIAL OOCYTE ACTIVATION WITH CALCIUM IONOPHORE; IS IT SAFE? [PDF]

Fertility and Sterility, 2021
Ines Chabchoub, Sonia Mnallah, med Habib BEN Aribia, Khaled Mahmoud, Mohamed Khrouf, Fethi Zhioua, Khaled Terras, Hanen Elloumi   +7 more
openaire   +1 more source

Artificial Meiotic Arrest and Parthenogenetic Activation of Buffalo Oocytes Using Cycloheximide

CYTOLOGIA, 2007
Maintaining oocytes at germinal vesicle (GV) stage without damaging their quality would allow synchronization of maturation and homogenization of the oocyte population. Activation of the oocyte is very important for a number of oocyte or embryo related technologies including intracytoplasmic sperm injection and cloning by nuclear transfer.
Karima Gh. M. Mahmoud, R. Puglisi, T. H. Scholkamy   +2 more
openaire   +2 more sources