Steroid production by amphibian (Rana nigromaculata) ovarian follicles at different developmental stages

1991 ◽  
Vol 260 (1) ◽  
pp. 66-73 ◽  
Author(s):  
Hyuk B. Kwon ◽  
Han H. Choi ◽  
Ryun S. Ahn ◽  
Yong D. Yoon
Keyword(s):  
Developmental Stages ◽  
Ovarian Follicles ◽  
Steroid Production ◽  
Rana Nigromaculata

Ultrastructural analysis of Drosophila ovarian follicles differing in yolk polypeptide (yps) composition

Development ◽  
1993 ◽  
Vol 117 (1) ◽  
pp. 319-328
Author(s):  
F. Giorgi ◽  
P. Lucchesi ◽  
A. Morelli ◽  
M. Bownes
Keyword(s):  
Golgi Apparatus ◽  
Juvenile Hormone ◽  
Developmental Stages ◽  
Ovarian Follicles ◽  
Endocytic Pathway ◽  
Intermediate Cell ◽  
Wild Type ◽  
Vesicular Traffic

Drosophila ovarian follicles were examined ultrastructurally to study the vesicular traffic in the cortical ooplasm. The endocytic pathway leading to the production of yolk spheres was visualized following in vivo or in vitro exposure to peroxidase. The Golgi apparatus and the yolk spheres of wild-type ovarian follicles were preferentially labelled by fixation with osmium zinc iodide (OZI). Labelling of wild-type ovarian follicles was compared to that of several mutant follicles--L186/Basc, fs(2)A17 and ap4--which are defective in vitellogenesis. In these mutants, the Golgi apparatus and the vesicles nearby were either scantly labelled or not labelled at all. In oocytes from flies homozygous for the gene fs(1)1163, the Golgi apparatus was labelled as in the controls, but no yolk spheres appeared to be labelled with OZI at any of the developmental stages. In several Drosophila strains, the pattern of OZI label in the cortical ooplasm was seen to vary in relation to the number of yp structural genes. In starved Drosophila females, OZI labelling of the cortical ooplasm appeared restricted to the Golgi apparatus and to an extended tubular network. A similar labelling pattern was also detected in in vitro cultured vitellogenic follicles. Refeeding, topical application of juvenile hormone analogue to starved females or hormone addition to the culture medium, all caused the yolk spheres to become labelled with OZI and to incorporate peroxidase. These observations prove that impairing endocytic uptake by either mutation or lack of juvenile hormone prevents fusion of coated vesicles and tubules with the yolk spheres and leads them instead to form an intermediate cell compartment with Golgi-derived vesicles.

In vitro steroid production by triploid ovarian follicles

2003 ◽  
Vol 133 (3) ◽  
pp. 279-286 ◽  
Author(s):  
D. Schafhauser-Smith ◽  
T.J. Benfey
Keyword(s):  
Ovarian Follicles ◽  
Steroid Production

Expression and localization of adiponectin and its receptors in ovarian follicles during different stages of development and the modulatory effect of adiponectin on steroid production in water buffalo

2019 ◽  
Vol 54 (9) ◽  
pp. 1291-1303
Author(s):  
Mahesh Gupta ◽  
Krushna Bibichand Bahiram ◽  
Vikas Muralidhar Sardar ◽  
Jayant Pandurang Korde ◽  
Swapnil P. Magar ◽  
...  
Keyword(s):  
Water Buffalo ◽  
Ovarian Follicles ◽  
Stages Of Development ◽  
Steroid Production

Vitrification Changes The Fatty Acids Profile of Zebrafish Ovarian Follicles At Different Developmental Stages

Cryobiology ◽  
2021 ◽  
Vol 103 ◽  
pp. 189
Author(s):  
Fernanda De Mello ◽  
Victor H. Marques ◽  
Natalia P. Faria ◽  
Leandro C. Godoy ◽  
Renata G. Moreira
Keyword(s):  
Fatty Acids ◽  
Developmental Stages ◽  
Ovarian Follicles ◽  
Fatty Acids Profile

Effects of thyroid hormone on gonadotropin-induced steroid production in medaka, Oryzias latipes, ovarian follicles

1993 ◽  
Vol 11 (1-6) ◽  
pp. 265-272 ◽  
Author(s):  
Kiyoshi Soyano ◽  
Toshihiko Saito ◽  
Masaki Nagae ◽  
Kohei Yamauchi
Keyword(s):  
Thyroid Hormone ◽  
Oryzias Latipes ◽  
Ovarian Follicles ◽  
Steroid Production
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