Results 211 to 220 of about 24,097 (251)

Immunosuppressive activity in the rat seminiferous tubules

Journal of Reproductive Immunology, 1992
Rat seminiferous tubule segments in defined stages of the epithelial cycle were isolated by transillumination-assisted microdissection. The segments were cultured together with ConA-stimulated peripheral blood lymphocytes (PBL) and incorporation of 3H-labelled thymidine was measured.
Harri Hakovirta, K Jahnukainen, P Pöllänen   +2 more
exaly   +3 more sources

Three‐dimensional structure of seminiferous tubules in the Syrian hamster [PDF]

Journal of Anatomy, 2021
The hamster is useful for the study of male reproductive biology. However, unlike in the mouse and rat, the gross structure of seminiferous tubules in the hamster is largely unknown.
Hiroki Nakata, Atsushi Mizokami, Yoko Sato   +2 more
exaly   +2 more sources

The Ultrastructure of the Seminiferous Tubule

1982
During the short phase of sexual activity the germ cell development can be described light microscopically as a succession of defined stages. A detailed representation of the different cell types is only possible, however, in the area of ultrastructural examination.
openaire   +1 more source

Staging of Mouse Seminiferous Tubule Cross-Sections

2009
Spermatogenesis is a cyclic process during which, within each epithelial area, various generations of germ cells undergo a series of developmental steps according to a fixed time schedule. The cycle of the seminiferous epithelium can be subdivided into stages.
Ahmed, Emad A., de Rooij, Dirk G.
openaire   +4 more sources

The endocrinology of seminiferous tubule failure

2021
This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
openaire   +1 more source

INHIBIN FROM CULTURES OF RAT SEMINIFEROUS TUBULES

Journal of Endocrinology, 1978
SUMMARY Medium from cultures of mature rat seminiferous tubules contained a substance which suppressed, in a dose-related manner, the luteinizing hormone releasing hormone (LH-RH)-stimulated secretion of FSH by cultured rat pituitary cells. The secretion of LH was suppressed to a lesser extent and the basal secretion of both LH and FSH was ...
L W, Eddie, H W, Baker, A, Dulmanis, R E, Higginson, B, Hudson   +4 more
openaire   +2 more sources

Dislocated type-A spermatogonia in human seminiferous tubules

Cell and Tissue Research, 1984
Type-A spermatogonia can be found in different locations throughout the germinal epithelium of human seminiferous tubules. Generally they represent the population of germ cells adjacent to the basal lamina, but under special conditions they may be located in the adluminal compartment.
A F, Holstein, E, Bustos-Obregón, M, Hartmann   +2 more
openaire   +2 more sources

Multinucleated Spermatocytes and Spermatids in Human Seminiferous Tubules*

Andrologia, 2009
The cytology of multinucleated spermatocytes and spermatid giant cells in the seminiferous tubules of men with oligozoospermia and of men older than 65 years has been investigated electron microscopically. Two different processes which are responsible for the origin of multinucleated germ cells have been analysed: Defects of the intercellular bridges ...
A F, Holstein, C, Eckmann
openaire   +2 more sources

Hormonal Regulation of the Seminiferous Tubule Function

1975
Until the second half of the third decade of the twentieth century, questions concerning the controlling mechanisms in the development of the testes and in the maintenance of their function were frequently asked, but poorly understood. Numerous clinical and pathological observations led to a vague idea that these mechanisms may be located within the ...
openaire   +2 more sources

Assessment of Spermatogenesis Through Staging of Seminiferous Tubules

2012
Male germ cells in all mammals are arranged within the seminiferous epithelium of the testicular tubules in a set of well-defined cell associations called stages. The cellular associations found in these stages and characteristics of the cells used to identify the stages have been well described.
Marvin L, Meistrich, Rex A, Hess
openaire   +2 more sources