Results 11 to 20 of about 75,211 (286)

Visceral endoderm expression of Yin-Yang1 (YY1) is required for VEGFA maintenance and yolk sac development. [PDF]

PLoS ONE, 2013
Mouse embryos lacking the polycomb group gene member Yin-Yang1 (YY1) die during the peri-implantation stage. To assess the post-gastrulation role of YY1, a conditional knock-out (cKO) strategy was used to delete YY1 from the visceral endoderm of the yolk
Siyeon Rhee, Mara-Isel Guerrero-Zayas, Mary C Wallingford, Pablo Ortiz-Pineda, Jesse Mager, Kimberly D Tremblay   +5 more
doaj   +1 more source

Change of zinc mobilization and gene expression of key zinc transport proteins between the yolk sac membrane and liver of duck embryonic developing

Poultry Science, 2022
: Zinc (Zn) deposition in egg yolk is essential for the rapid growth and complete development of the avian embryo. Thus, it is crucial to obtain maximal Zn mobilization at an appropriate time during development in favor of the survival of avian embryos ...
S.P. Bai, W. Gao, T. Yuan, X.Y. Ma, L.J. He, L. Huang, S. Wei, C. Liu, W.C. Wang, L. Yang, Y.W. Zhu   +10 more
doaj   +1 more source

Maternal physical activity affects yolk sac size and growth in early pregnancy, but girls and boys use different strategies

Scientific Reports, 2023
This longitudinal study investigated the impact of actigraphy-measured maternal physical activity on yolk sac size during early development. The yolk sac, a transient extraembryonic organ, plays a crucial role in embryonic development and is involved in ...
Alexander Vietheer, Torvid Kiserud, Cathrine Ebbing, Hemamaalini Rajkumar, Øystein Ariansen Haaland, Rolv Terje Lie, Roberto Romero, Jörg Kessler   +7 more
doaj   +1 more source

Primary Nasopharngeal Yolk Sac Tumor: A Case Report [PDF]

Journal of Clinical and Diagnostic Research, 2016
Yolk sac tumour also known as primitive endodermal tumour is the most common malignant germ cell tumour (GCT) in the paediatric age group. Most common sites of involvement are ovaries and testes, but rarely can occur in the extragonadal sites.
Dhanalakshmi Arumugam, Pavithra Thandavarayan, Lalitha Chidambaram, Sudha Boj, Sumathi Marudasalam   +4 more
doaj   +1 more source

Urachal yolk sac tumor penetrating the bladder as a diagnostic challenge: a case report and review of the literature

Diagnostic Pathology, 2022
Background Yolk sac tumor (YST) is a germ cell tumor. It is primarily located in the gonads but can also occur extragonadally (extragonadal yolk sac tumor - EGYST), most commonly in the pelvis, retroperitoneum or mediastinum.
Vladimír Šámal, Tomáš Jirásek, Vít Paldus, Igor Richter, Ondřej Hes   +4 more
doaj   +1 more source

Pure primary yolk sac tumor of the endometrium tends to occur at a younger age: A case report and literature analysis

SAGE Open Medical Case Reports, 2021
We present a case of primary yolk sac tumor of the endometrium. This rare tumor occurred in a 43-year-old woman with a pure primary yolk sac tumor. The tumor resembled yolk sac tumor morphology of the ovary.
Huijuan Ge, Rui Bi
doaj   +1 more source

THE ROLE OF SALMONELLA SPECIES AS A CAUSE OF OMPHALITIS IN BABY CHICKS IN ASSIUT GOVERNORATE [PDF]

Assiut Veterinary Medical Journal, 2014
A total of 130 diseased and dead broiler chicks of 1-10 days of age obtained from different sources were examined; yolk sac samples from these chicks were cultured and the bacteria were isolated and identified on biochemical tests.
NAGLAA M. ALI, AML A. BAKHEET, SHAHERA M. RASHAD   +2 more
doaj   +1 more source

Deficiency of autotaxin/lysophospholipase D results in head cavity formation in mouse embryos through the LPA receptor-Rho-ROCK pathway [PDF]

, 2010
Autotaxin, encoded by the Enpp2 gene, generates lysophosphatidic acid (LPA) extracellularly, eliciting various cellular responses through specific LPA receptors.
Keino-Masu Kazuko, Koike Seiichi, Masu Masayuki, 桝 和子, 桝 正幸   +4 more
core   +1 more source

KIT Is Required for Fetal Liver Hematopoiesis

Frontiers in Cell and Developmental Biology, 2021
In the mouse embryo, endothelial cell (EC) progenitors almost concomitantly give rise to the first blood vessels in the yolk sac and the large vessels of the embryo proper.
Alessandro Fantin, Alessandro Fantin, Carlotta Tacconi, Emanuela Villa, Elena Ceccacci, Laura Denti, Christiana Ruhrberg   +6 more
doaj   +1 more source

The zebrafish xenograft platform-A novel tool for modeling KSHV-associated diseases [PDF]

, 2019
Kaposi\u27s sarcoma associated-herpesvirus (KSHV, also known as human herpesvirus-8) is a gammaherpesvirus that establishes life-long infection in human B lymphocytes.
Berman, Jason N, Coombs, Andrew J, Dellaire, Graham, Druley, Todd E, Ha, Michael N, McCormick, Craig, Melong, Nicole, O\u27Leary, David, Pringle, Eric S, Robinson, Carolyn-Ann, Veinotte, Chansey, Wertman, Jaime, Young, Andrew L   +12 more
core   +2 more sources