Results 61 to 70 of about 16,852 (174)

Toxic Effects of Bisphenol A and Its Analogs on Ovarian Structure and Function: A Narrative Review of Ovary‐Focused Studies

Journal of Applied Toxicology, EarlyView.
ABSTRACT Bisphenol A (BPA) is a widely used industrial chemical found in polycarbonate plastics and epoxy resins and is recognized for its endocrine‐disrupting properties. Human exposure is common due to its presence in food packaging and everyday products. As BPA use has been restricted, structurally similar compounds such as BPS, BPB, BPAF, and BADGE
Nurbanu Zengin, Marwa Tawfıq Ahmed Alsalım, Muhammed Canik, Sevda Bağdatlı, Nazan Deniz Yön   +4 more
wiley   +1 more source

Sperm Head–Tail Coupling Apparatus Diversity and Common Themes Among Species

Andrology, EarlyView.
ABSTRACT Background A stable connection between the sperm head (containing the nucleus and acrosome) and tail (containing the axoneme, mitochondrial sheath, and periaxonemal structures) is critical for fertility. This connection is mediated by a series of nuclear, cytoplasmic, and centriole components that make up the head–tail coupling apparatus (HTCA)
Danielle B. Buglak, Brian J. Galletta, Nasser M. Rusan   +2 more
wiley   +1 more source

A computational model predicts Xenopus meiotic spindle organization [PDF]

Journal of Cell Biology, 2010
The metaphase spindle is a dynamic bipolar structure crucial for proper chromosome segregation, but how microtubules (MTs) are organized within the bipolar architecture remains controversial. To explore MT organization along the pole-to-pole axis, we simulated meiotic spindle assembly in two dimensions using dynamic MTs, a MT cross-linking force, and a
Loughlin, Rose, Heald, Rebecca, Nédélec, François   +2 more
openaire   +4 more sources

Roles of Tubulin Concentration during Prometaphase and Ran-GTP during Anaphase of Caenorhabditis elegans Meiosis

Life Science Alliance
Tubulin dimers concentrate within an ER spindle envelope because cytoplasmic organelles outside the envelope occupy significant volume. In many animal species, the oocyte meiotic spindle, which is required for chromosome segregation, forms without ...
Ting Gong, Karen L McNally, Siri Konanoor, Alma Peraza, Cynthia Bailey, Stefanie Redemann, Francis J McNally   +6 more
doaj   +1 more source

Arp2/3 complex regulates asymmetric division and cytokinesis in mouse oocytes. [PDF]

PLoS ONE, 2011
Mammalian oocyte meiotic maturation involves oocyte polarization and a unique asymmetric division, but until now, the underlying mechanisms have been poorly understood.
Shao-Chen Sun, Zhen-Bo Wang, Yong-Nan Xu, Seung-Eun Lee, Xiang-Shun Cui, Nam-Hyung Kim   +5 more
doaj   +1 more source

OsPRD2 is essential for double-strand break formation, but not spindle assembly during rice meiosis

Frontiers in Plant Science, 2023
Meiotic recombination starts with the programmed formation of double-strand breaks (DSB) in DNA, which are catalyzed by SPO11, a type II topoisomerase that is evolutionarily conserved, and several other accessary proteins. Homologs of MEIOSIS INHIBITOR 4
Chong Wang, Chong Wang, Shuying Qu, Jie Zhang, Ming Fu, Xiaofei Chen, Wanqi Liang   +6 more
doaj   +1 more source

Anatomical and Histological Descriptions of the Male Reproductive System of the Alfalfa Weevil of Hypera postica (Gyllenhal, 1813) (Coleoptera: Curculionidae) Using Light and Scanning Electron Microscopies

Acta Zoologica, EarlyView.
ABSTRACT Features of the reproductive organs, such as the number of testicular follicles, testis colour and the morphology of the glands, can be used as systematic characters. For this purpose, this paper was the first description of the male reproductive system anatomy and histology of Hypera postica (Gyllenhal, 1813) (Coleoptera: Curculionidae), a ...
Nurcan Özyurt Koçakoğlu, Selami Candan, Hicret Arslan, Mustafa Güllü   +3 more
wiley   +1 more source

CDK1 makes the meiotic spindle wait [PDF]

Journal of Cell Biology, 2013
![Figure][1] In an oocyte with enhanced CDK1 activity, every kinetochore (red) forms a stable, end-on attachment to a spindle microtubule (green). A delay in cyclin-dependent kinase activity prevents meiotic chromosomes from prematurely attaching to spindle microtubules, [Davydenko et ...
openaire   +1 more source

A Taz1- and Microtubule-Dependent Regulatory Relationship between Telomere and Centromere Positions in Bouquet Formation Secures Proper Meiotic Divisions. [PDF]

PLoS Genetics, 2016
During meiotic prophase, telomeres cluster, forming the bouquet chromosome arrangement, and facilitate homologous chromosome pairing. In fission yeast, bouquet formation requires switching of telomere and centromere positions.
Kazuhiro Katsumata, Ami Hirayasu, Junpei Miyoshi, Eriko Nishi, Kento Ichikawa, Kazuki Tateho, Airi Wakuda, Hirotada Matsuhara, Ayumu Yamamoto   +8 more
doaj   +1 more source

Integrative Phosphoproteomic Profiling Reveals Stage‐Specific Signalling and Metabolism in Equine Melanocytic Neoplasm

Veterinary and Comparative Oncology, EarlyView.
ABSTRACT Equine melanocytic neoplasms (EMN) are aggressive tumours characterised by high metastatic potential and limited therapeutic options available. However, the molecular mechanisms underlying their progression remain poorly understood. This study therefore presents the integrative phosphoproteomic analysis of EMN tissue, with the aim of ...
Paitoon Srimontri, Amornthep Kingkaw, Nawarus Prapaiwan, Rangsima Sujittosakul, Nichapat Iamkaewprasert, Jiraschaya Piputwat, Puetta Isama‐al, Thanutchanok Munkongdee, Thanapon Chotikaprakal, Petchpailin Yanyongsirikarn, Narumon Phaonakrop, Sittiruk Roytrakul, Wanwipa Vongsangnak, Parichart Tesena   +13 more
wiley   +1 more source