"Bacterial sex," as it was called, revolutionized the study of genetics, largely by making available a whole new class of cheap, fast-growing, and easily manipulated organisms. But what was "bacterial sex?" How could single-celled organisms have "sex" or even be sexually differentiated? The...
In order to investigate the function of gonadal somatic cells in the sex differentiation of germ cells, we produced chimera fish containing both male (XY) and female (XX) cells by means of cell transplantation between blastula embryos in the medaka, Oryzias latipes. Sexually mature chimera fish ...
BackgroundThere are sex differences in risk for stroke and small vessel ischemic disease in the brain. Microvesicles (MV) derived from activated cells vary by cell of origin and the stimulus initiating their release. MV released from cells activated by inflammatory and thrombotic factors have the ...
Why and how sexual reproduction is maintained in natural populations, the so-called "queen of problems", is a key unanswered question in evolutionary biology. Recent efforts to solve the problem of sex have tended to emphasize results generated from laboratory settings and traditional model systems....
Similarly, the number of cells secreting IFN-γ in men correlated with serum DHEA-S levels ( P <0·001). In contrast, post-menopausal women had fewer cells actively secreting cytokines and the activity of these cells did not correlate with sex hormone levels. These results suggest that sex ...
THE diagnosis of sex by the examination of cell nuclei, first described in 1949 by Barr and Bertram 1 in the nerve cells of the cat, has since been extended to cells from the tissues of many species, especially man and is of great clinical and academic interest, particularly in individuals...
In highly polyploid nuclei of the Malpighian tubule cells and silk glands, females showed a heterochromatin body, the so-called sex chromatin or W chromatin, that was absent in male nuclei. This indicated that the carob moth possesses a WZ/ZZ sex chromosome system. However, we failed to ...
Sex Cord Stromal Tumor of the Cat: So-Called Androblastoma with Sertoli-Leydig Cell Pattern 来自 NCBI 喜欢 0 阅读量: 70 作者:W Hofmann,D Arbiter,D Scheele 摘要: 1 CHANDLER, F.W.; CALLAWAY, C.S.; ADAMS, S.R.: Pancreatitis associated with an adenovirus in a rhesus monkey. Vet ...
curiosa were found to be tetraploid cells. The sex chromosome system described herein is the first case of XY male heterogamety in the Spionidae and only the second one so far documented in the Polychaeta. 展开 关键词: transfer function method regular waves ...
The present study was designed to examine the role of calcium-dependent signal transduction as a common link between the atherogenic effect of LDL and the mitigating influence of sex hormones in aortic endothelial (EC) and smooth muscle cells (SMC). Human aortic EC and SMC were pre-incubated ...