Results 31 to 40 of about 414,793 (308)
Plasma and testicular testosterone levels, volume density and number of Leydig cells and spermatogenic efficiency of rabbits [PDF]
, 2002 Plasma and tissue testosterone concentrations were determined by radioimmunoassay in 12 eight-month-old sexually mature New Zealand White rabbits and evaluated for possible associations with spermatogenic efficiency as well as with volume density and ...
Berndtson, William E. +2 more
core +2 more sources
Stem cells of Hydra magnipapillata can differentiate into somatic cells and germ line cells [PDF]
, 1987 We investigated whether all stem cells of Hydra can differentiate both somatic cells and gametes or if a separate germ line exists in these phylogenetically old organisms.
Bode +28 more
core +1 more source
Frontiers in Endocrinology, 2023 BackgroundSOX17 has been identified as a critical factor in specification of human primordial germ cells, but whether SOX17 regulates development of germ cells after sex differentiation is poorly understood. MethodsWe collected specimens of gonadal ridge
Ying-Yi Luo +9 more
doaj +1 more source
Identification of side population cells in mouse primordial germ cells and prenatal testis [PDF]
, 2011 In mammals, the stem cells of spermatogenesis are derived from an embryonic cell population called primordial germ cells (PGCs). Spermatogonial stem cells displaying the "side population" (SP) phenotype have been identified in the immature and adult ...
De Felici, Massimo +6 more
core +2 more sources
Aquaculture Reports, 2021 The objective of this study was to understand germ cell renewal and differentiation in the Yesso scallop Mizuhopecten yessoensis throughout its reproductive cycle.
Mariia Mokrina +4 more
doaj +1 more source
The Journal of Poultry Science, 2001 Chicken primordial germ cells isolated from embryonic blood were cultured in vitro on feeder cells derived from the gonads of 7-day incubated embryos. Primordial germ cells were proliferated about 13 times during the 4 day culture period on the feeder ...
Mitsuru Naito +5 more
doaj +1 more source
Germ cells in the teleost fish medaka have an inherent feminizing effect. [PDF]
PLoS Genetics, 2018 Germ cells are the only cells that can transfer genetic materials to the next generation via the sperm or egg. However, recent analyses in teleosts revealed another essential role of germ cells: feminizing the gonads.
Toshiya Nishimura +7 more
doaj +1 more source
Germ Cell Derivation from Pluripotent Stem Cells for Understanding In Vitro Gametogenesis
Cells, 2021 Assisted reproductive technologies (ARTs) have developed considerably in recent years; however, they cannot rectify germ cell aplasia, such as non-obstructive azoospermia (NOA) and oocyte maturation failure syndrome. In vitro gametogenesis is a promising
Tae-Kyung Hong +3 more
doaj +1 more source
Primate Primordial Germ Cells Acquire Transplantation Potential by Carnegie Stage 23. [PDF]
, 2017 Primordial germ cells (PGCs) are the earliest embryonic progenitors in the germline. Correct formation of PGCs is critical to reproductive health as an adult.
Chen, Di +7 more
core +2 more sources
Localized ultraviolet laser microbeam irradiation of early Drosophila embryos: Fate maps based on location and frequency of adult defects [PDF]
, 1979 Drosophila embryos were locally irradiated with a 257-nm laser microbeam during blastoderm and germ band stages. Depending on stage and beam diameter (10–30 μm), from 0 to 45 nuclei were exposed to the uv radiation.
Cremer, Christoph +4 more
core +1 more source