Results 41 to 50 of about 32,718 (172)

Mechanisms of programmed cell death during oogenesis in Drosophila virilis

, 2006
We describe the features of programmed cell death occurring in the egg chambers of Drosophila virilis during mid-oogenesis and late oogenesis. During mid-oogenesis, the spontaneously degenerating egg chambers exhibit typical characteristics of apoptotic ...
Athanassios D. Velentzas, Velentzas, Athanassios D., Nezis, I. P., Margaritis, Lukas H., Ioannis P. Nezis, Stravopodis, Dimitrios J., Papassideri, Issidora S., Lukas H. Margaritis, Dimitrios J. Stravopodis, Issidora S. Papassideri   +9 more
core   +1 more source

Chronic Stress Detrimentally Affects In Vivo Maturation in Rat Oocytes and Oocyte Viability at All Phases of the Estrous Cycle

Animals, 2021
Background: Stress has been considered as one of the causes of decreased reproductive function in women. However, direct evidence of the effect of chronic stress on oocytes depending on estrous cycle phases is limited.
Fahiel Casillas, Miguel Betancourt, Lizbeth Juárez-Rojas, Yvonne Ducolomb, Alma López, Alejandra Ávila-Quintero, Jimena Zamora, Mohammad Mehdi Ommati, Socorro Retana-Márquez   +8 more
doaj   +1 more source

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

Expression and cellular localization of the Toucan protein during Drosophila oogenesis.

, 2000
International audienceThe toucan (toc) gene is required in the germline for somatic cell patterning during Drosophila oogenesis. To better understand the function of toc, we performed a detailed analysis of the distribution of the Toucan protein during ...
Grammont, Muriel, Couderc, Jean-Louis
core   +4 more sources

Altered germline cyst formation and oogenesis in Tex14 mutant mice

Biology Open, 2021
During oocyte differentiation in mouse fetal ovaries, sister germ cells are connected by intercellular bridges, forming germline cysts. Within the cyst, primary oocytes form via gaining cytoplasm and organelles from sister germ cells through germ cell ...
Kanako Ikami, Nafisa Nuzhat, Haley Abbott, Ronald Pandoy, Lauren Haky, Allan C. Spradling, Heather Tanner, Lei Lei   +7 more
doaj   +1 more source

Calpain Proteases and the Evolving Signaling Network in Insect Embryonic Patterning

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
Insect embryonic Dorsal‐Ventral (DV) patterning relies on the BMP and Toll pathways to different extents. Calcium‐dependent cystein proteases of the Calpain family also exert an important function to pattern the DV axis. In Drosophila, Calpain A cleaves the Cactus/IkappaB inhibitor and modifies Toll signals in ventral regions of the embryo. In Rhodnius
Alison Julio, Helena Araujo
wiley   +1 more source

The annual cycle of oogenesis in the shanny, Lipophrys pholis (Pisces: Blenniidae)

Scientia Marina, 2012
Lipophrys pholis has been shown to be responsive to a variety of environmental contaminants, some of them able to impair reproduction. Description of the normal cycle of oogenesis of this newly proposed sentinel species is important since this data may
Filipa Ferreira, Miguel M. Santos, Maria Armanda Reis-Henriques, Natividade M. Vieira, Nuno M. Monteiro   +4 more
doaj   +1 more source

Maternal body condition and season influence RNA deposition in the oocytes of alfalfa leafcutting bees (Megachile rotundata)

Frontiers in Genetics, 2023
Maternal effects are an important source of phenotypic variance, whereby females influence offspring developmental trajectory beyond direct genetic contributions, often in response to changing environmental conditions. However, relatively little is known
Mallory A. Hagadorn, Frances K. Hunter, Tim DeLory, Makenna M. Johnson, Makenna M. Johnson, Theresa L. Pitts-Singer, Karen M. Kapheim   +6 more
doaj   +1 more source

Analysis of Gene Expression in Aedes aegypti Suggests Changes in Early Genetic Control of Mosquito Development

Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, EarlyView.
ABSTRACT Aedes aegypti, a critical vector for tropical diseases, poses significant challenges for studying its embryogenesis due to difficulties in removing its rigid chorion and achieving effective fixation for in situ hybridization. Here, we present novel methodologies for fixation, dechorionation, DAPI staining, and in situ hybridization, enabling ...
Renata Coutinho‐dos‐Santos, Danielle Santos, Lupis Ribeiro, Jonathan J. Mucherino‐Muñoz, Marcelle Uhl, Carlos Logullo, A. Mendonça‐Amarante, M. Fantappie, Rodrigo Nunes‐da‐Fonseca   +8 more
wiley   +1 more source

Transcriptomic and functional analyses of the piRNA pathway in the Chagas disease vector Rhodnius prolixus.

PLoS Neglected Tropical Diseases, 2018
The piRNA pathway is a surveillance system that guarantees oogenesis and adult fertility in a range of animal species. The pathway is centered on PIWI clade Argonaute proteins and the associated small non-coding RNAs termed piRNAs.
Tarcisio Brito, Alison Julio, Mateus Berni, Lisiane de Castro Poncio, Emerson Soares Bernardes, Helena Araujo, Michael Sammeth, Attilio Pane   +7 more
doaj   +1 more source