spermatogonium

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spermatogonium

 [sper″mah-to-go´ne-um] (Gr.)
an undifferentiated male germ cell, originating in a seminal tubule and dividing into two spermatocytes.

sper·ma·to·go·ni·um

(sper'mă-tō-gō'nē-ŭm),
The primordial male cell derived by mitotic division from the yolk sac that migrates into the developing testes. Subsequent to puberty, it differentiates by increasing several times in size to become a primary spermatocyte.
See also: spermatid.
[spermato- + G. gonē, generation]

spermatogonium

/sper·ma·to·go·ni·um/ (-go´ne-um) pl. spermatogo´nia   an undifferentiated male germ cell, originating in a seminiferous tubule and dividing into two primary spermatocytes.

spermatogonium

(spər-măt′ə-gō′nē-əm, spûr′mə-tə-)
n. pl. spermatogo·nia (-nē-ə)
Any of the cells that give rise through mitosis to the spermatocytes and are found in the testes of vertebrates.

sper·mat′o·go′ni·al (-nē-əl) adj.

spermatogonium

[-gō′nē·əm] pl. spermatogonia
Etymology: Gk, sperma + gone, generation
a male germ cell that gives rise to a spermatocyte early in spermatogenesis.

sper·ma·to·go·ni·um

, spermatogone (spĕr'mă-tō-gō'nē-ŭm, -mă-tō-gōn)
The undifferentiated male sex cell derived by mitotic division from a primordial germ cell; increasing several times in size, it becomes a primary spermatocyte.
See also: spermatid
Synonym(s): spermatoblast.
[spermato- + G. gonē, generation]

spermatogonium

an early diploid stage of male GAMETO GENESIS.

spermatogonium

pl. spermatogonia [Gr.] an undifferentiated male germ cell, originating in a seminal tubule and dividing into a new generation of spermatogonia or into two spermatocytes.
References in periodicals archive ?
Wnt5a is a cell-extrinsic factor that supports self-renewal of mouse spermatogonial stem cells.
A possible driver of neoplastic transformation of maturation-arrested gonocytes is the failure of these cells to downregulate expression of OCT3/4, an antiapoptotic oncofetal protein, a process that normally occurs when gonocytes relocate from the center of the seminiferous tubule to the spermatogonial niche.
However, the mechanisms involved in the regulation of spermatogonial stem cells, spermatocytes, and spermatid proliferation and differentiation have not been elucidated.
In rodents, the spermatogonial population is divided into two main categories.
Spermatogenesis is a complex and tightly-regulated process of cell proliferation and differentiation leading to production of mature spermatozoa from Spermatogonial Stem Cells (SSCs) The coordination of SSCs self-renewal and differentiation is regulated by growth factors produced by somatic cells surrounding SSCs, particularly Sertoli cells (1).
Group 1 acted as the control in which spermatogonial stem cells were co-cultured with Sertoli cells alone.
As spermatogoniais thought as spermatogonial stem cells (SSC) while Apr and Aal cells show virtually very few differentiation characteristics.
During the initial maturation, the amounts of spermatogonial cysts and spermatocytes are high, with considerable increase of the latter.
Moreover, during spermatogonial mitosis, cytokinesis is incomplete, leaving the spermatogonial clonal cells interconnected by cytoplasmic bridges (Schulz et al.
niloticus showed organized branching lobules of the unrestricted spermatogonial type (Figure 5b).
Paternal age effect mutations and selfish spermatogonial selection: causes and consequences for human disease.