Results 101 to 110 of about 11,116,342 (256)
Immature germ cells in semen - correlation with total sperm count and sperm motility
Journal of Cytology, 2013 Background: Current data regarding infertility suggests that male factor contributes up to 30% of the total cases of infertility. Semen analysis reveals the presence of spermatozoa as well as a number of non-sperm cells, presently being mentioned in ...
Priya S Patil +3 more
doaj +1 more source
Sec6 mutations and the Drosophila exocyst complex [PDF]
, 2005 To allow a detailed analysis of exocyst function in multicellular organisms, we have generated sec6 mutants in Drosophila. We have used these mutations to compare the phenotypes of sec6 and sec5 in the ovary and nervous system, and we find them to be ...
Denef, Natalie +5 more
core +2 more sources
Insights into female germ cell biology: from in vivo development to in vitro derivations
Asian Journal of Andrology, 2015 Understanding the mechanisms of human germ cell biology is important for developing infertility treatments. However, little is known about the mechanisms that regulate human gametogenesis due to the difficulties in collecting samples, especially germ ...
Dajung Jung, Kehkooi Kee
doaj +1 more source
Interpreting the dependence of mutation rates on age and time [PDF]
, 2015 Mutations can arise from the chance misincorporation of nucleotides during DNA replication or from DNA lesions that are not repaired correctly. We introduce a model that relates the source of mutations to their accumulation with cell divisions, providing
Gao, Ziyue +3 more
core +5 more sources
Characterizing the zebrafish organizer: microsurgical analysis at the early-shield stage [PDF]
, 1996 The appearance of the embryonic shield, a slight thickening at the leading edge of the blastoderm during the formation of the germ ring, is one of the first signs of dorsoventral polarity in the zebrafish embryo.
Fraser, Scott E., Shih, John
core
An orchestrated intron retention program in meiosis controls timely usage of transcripts during germ cell differentiation [PDF]
, 2017 Global transcriptome reprogramming during sper-matogenesis ensures timely expression of factors in each phase of male germ cell differentiation. Sper-matocytes and spermatids require particularly exten-sive reprogramming of gene expression to switch from
Alberdi, Antonio J. +9 more
core +2 more sources
Journal of the Belgian Society of Radiology, 2010 Germ cell tumours represent about 3 to 8% of pediatric brain tumours. Occurrence of diabetes insipidus is common in the case of suprasellar germ cell tumors. The diagnosis may be advanced by MRI owing to the location and relatively univocal characteristics of the lesion signal.
Kreutz, J +5 more
openaire +5 more sources
Understanding spermatogenesis is a prerequisite for treatment
Reproductive Biology and Endocrinology, 2003 Throughout spermatogenesis multiplication, maturation and differentiation of germ cells results in the formation of the male gamete. The understanding of spermatogenesis needs detailed informations about the organization of the germinal epithelium, the ...
Schulze Wolfgang +2 more
doaj +1 more source
PLoS ONE, 2014 The low efficiency of differentiation into male germ cell (GC)-like cells and haploid germ cells from human embryonic stem cells (hESCs) reflects the culture method employed in the two-dimensional (2D)-microenvironment.
Jung Jin Lim +3 more
doaj +1 more source
Mammalian germ cell migration during development, growth, and homeostasis
Reproductive Medicine and Biology, 2019 Background Germ cells represent one of the typical cell types that moves over a long period of time and large distance within the animal body. To continue its life cycle, germ cells must migrate to spatially distinct locations for proper development ...
Mizuho Kanamori +3 more
doaj +1 more source