Results 41 to 50 of about 1,544,426 (289)

Oocyte activation induced by spermatids and the spermatozoa [PDF]

International Journal of Andrology, 2000
It has been reported that a sperm factor (SF) found in spermatozoa plays a critical role in fertilization. However, particulars of the oocyte‐activating and Ca2+ oscillation (Ca‐Os)‐inducing abilities of this SF remain unknown. We examined these abilities of spermatids in mouse, hamster and human by a mouse test (injection of spermatids into mouse ...
K, Yanagida, H, Yazawa, H, Katayose, Y, Kimura, S, Hayashi, A, Sato   +5 more
openaire   +2 more sources

Small RNA pathways in mammalian oocytes

FEBS Open Bio, EarlyView.
Three distinct small RNA pathways operate in mammalian oocytes: RNAi interference (RNAi), the microRNA (miRNA) pathway, and the PIWI‐associated RNA (piRNA) pathway. These pathways use small RNAs to guide sequence‐specific repression and contribute to oocyte biology by targeting genes and mobile elements or appear insignificant since different ...
Petr Svoboda, Josef Pasulka
wiley   +1 more source

In vivo Imaging of oskar mRNA transport reveals the mechanism of posterior localization [PDF]

, 2008
oskar mRNA localization to the posterior of the Drosophila oocyte defines where the abdomen and germ cells form in the embryo. Although this localization requires microtubules and the plus end-directed motor, kinesin, its mechanism is controversial and ...
Zimyanin, Vitaly L, Gilchrist, Michael J., Pecreaux, J, Davis, Ilan, Zimyanin, Vitaly L., Gilchrist, Michael J, Clark, Alejandra, St Johnston, D, Belaya, K, Pecreaux, Jacques, Clark, A, Gilchrist, MJ, Davis, I, St Johnston, Daniel, Zimyanin, VL, Belaya, Katsiaryna, Johnston, Daniel St   +16 more
core   +1 more source

ATZ‐1 promotes DNA replication efficiency to maintain normal meiotic function

FEBS Open Bio, EarlyView.
Absence of ATZ‐1 interferes with meiotic DNA replication and cell cycle function via CHK‐1. This causes downstream defects associated with DNA damage and genomic integrity. Taken together, this study suggests that ATZ‐1 influences DNA replication efficiency and cell cycle function to maintain normal meiotic function.
Taylin E. Gourley, Luke W. Molesworth, Nethma H. Waduge, Fahimeh Eskandari, Peter R. Boag, Gregory M. Davis   +5 more
wiley   +1 more source

Intracytoplasmic sperm injection with assisted oocyte activation resulting in successful pregnancies and live birth in couples with globozoospermia: A report of two cases

Journal of Human Reproductive Sciences, 2018
Globozoospermia, characterized by round-headed acrosomeless sperm, is a rare and severe form of teratozoospermia. We report a successful pregnancy in two cases of total globozoospermia after intracytoplasmic sperm injection (ICSI) with oocyte activation ...
Puneet Kaur Kochhar, Pranay Ghosh
doaj   +1 more source

Avidin is evolutionarily conserved in fish but dispensable for development and resistance against Streptococcus agalactiae in zebrafish

FEBS Open Bio, EarlyView.
The presence of biotin‐binding avidin proteins in fish and their biological significance are poorly characterized. We cataloged fish avidins and demonstrate that they are widely present and evolutionarily conserved. We created avd knockout zebrafish and show that zebavidin is dispensable for development and that resistance of avd knockout embryos in ...
Anni K. Saralahti, Markus J. T. Ojanen, Mataleena Parikka, Otto Kauko, Mika Rämet, Vesa P. Hytönen   +5 more
wiley   +1 more source

Inhibition of IGFBP4 in Granulosa Cells Improves Reproductive Performance and Maintains Fertility With Age via YAP Signaling

Advanced Science, EarlyView.
IGFBP4 is upregulated in granulosa cells of aged ovaries across monkeys, mice, and humans. It inhibits YAP signaling, thereby suppressing cell proliferation and contributing to follicular dysfunction. Deletion of Igfbp4 in granulosa cells enhances ovulatory output, improves hormone profiles, and reproductive performance in aged female mice, suggesting ...
Qianhui Hu, Ajun Geng, Ziyuan Li, Fanghao Guo, Jingqiang Wang, Xinyi Chen, Meiling Zhang, Yi Arial Zeng, Wen Li   +8 more
wiley   +1 more source

Managing the Oocyte Meiotic Arrest—Lessons from Frogs and Jellyfish

Cells, 2020
During oocyte development, meiosis arrests in prophase of the first division for a remarkably prolonged period firstly during oocyte growth, and then when awaiting the appropriate hormonal signals for egg release. This prophase arrest is finally unlocked
Catherine Jessus, Catriona Munro, Evelyn Houliston   +2 more
doaj   +1 more source

Multidimensional and Multifunctional Laser‐Induced Graphene (LIG) for Point‐of‐Care and Wearable Biosensing, Theranostics, and Bioactive Interfaces Toward Personalized Healthcare and Regenerative Medicine

Advanced Science, EarlyView.
Multidimensional laser‐induced graphene (LIG) spanning from 0D to 3D architectures is comprehensively reviewed for multifunctional biomedical platforms, including biosensing, theranostics, and bioactive interface applications, which highlights its potentials for point‐of‐care diagnostics, wearable health monitoring, smart drug delivery, and tissue ...
Li Zhang, Yurou Yuan, Xiaohong Ding, Wing Cheung Mak   +3 more
wiley   +1 more source

Evaluation of different factors affecting the efficiency of oocytes cryopreservation in the bovine model [PDF]

, 2011
Interest in oocyte cryopreservation has recently increased. Cattle oocytes are sensitive to low temperatures, and despite the efforts of numerous research groups cryopreservation of oocytes remains a difficult task.
De Blasi, Marina
core   +1 more source