Ultrastructural features of atretic ovarian follicles in buffalo (Bubalus bubalis)

2016 ◽  
Author(s):  
P. Sreejalekshmi ◽  
R. V. Prasad ◽  
S. Selvaraju ◽  
K. V. Jamuna ◽  
S. Sivagnanam
Keyword(s):  
Free Radical ◽  
Early Stage ◽  
Morphological Changes ◽  
Follicular Development ◽  
Bubalus Bubalis ◽  
Oxygen Free Radical ◽  
Ovarian Follicles ◽  
Crescent Formation ◽  
Probable Role

The process of follicular development and features of morphological changes are essential to understand the factors involved during folliculogenesis and to improve fertility in buffalo. Hence the objective of the present study was to report ultrastructural features of atretic ovarian follicles in buffalo. In the early stage of atresia, the involvement of mitochondria was observed and whereas in the later stages of atresia, involvement of macrophages were observed. The granulosa cells of buffalo atretic tertiary follicles were observed to contain undulation of the nuclear membrane, crescent formation of the pyknotic nuclei and loopiness and undulations of the basal lamina. These features are similar to the reports in other species. The involvement of mitochondria in the early stage of atresia suggested the probable role of a reactive oxygen free radical induced damage.

Role of Oxygen Free Radical in the Expression of Interleukin-8 andInterleukin-1beta Gene in Mononuclear Phagocytic Cells

1995 ◽  
Vol 42 (6) ◽  
pp. 862
Author(s):  
Min Jong Kang ◽  
Jae Yeol Kim ◽  
Jae Seok Park ◽  
Seung Joon Lee ◽  
Chul Gyu Yoo ◽  
...  
Keyword(s):  
Free Radical ◽  
Oxygen Free Radical ◽  
Interleukin 8 ◽  
Phagocytic Cells

The Role of Allopurinol in Preventing Oxygen Free Radical Injury to Skeletal Muscle and Endothelial Cells after Ischemia-Reperfusion

1996 ◽  
Vol 12 (07) ◽  
pp. 447-450 ◽  
Author(s):  
R. Ferrari ◽  
Bruno Battiston ◽  
Giorgio Brunelli ◽  
Adriano Casella ◽  
Luigi Caimi
Keyword(s):  
Skeletal Muscle ◽  
Endothelial Cells ◽  
Free Radical ◽  
Ischemia Reperfusion ◽  
Oxygen Free Radical

Effects of free radical generation on mouse pial arterioles: probable role of hydroxyl radicals

1983 ◽  
Vol 245 (1) ◽  
pp. H139-H142 ◽  
Author(s):  
W. I. Rosenblum
Keyword(s):  
Free Radical ◽  
Xanthine Oxidase ◽  
Hydroxyl Radicals ◽  
Free Radical Scavengers ◽  
Radical Scavengers ◽  
Pial Arterioles ◽  
Probable Role ◽  
Radical Generation ◽  
Superoxide Scavenger

Mouse pial arterioles were exposed to the free radical-generating reactants acetaldehyde and xanthine oxidase. Concentrations of 0.5 mM acetaldehyde and 0.1 U/ml xanthine oxidase caused reversible dilations, whereas higher concentrations produced initial constrictions followed by reversible dilations. The following free radical scavengers inhibited the dilation when added to the lower concentrations of reactants: superoxide dismutase, a superoxide scavenger; catalase, an H2O2 scavenger; and mannitol, a hydroxyl scavenger. In addition, pretreatment of the animal with dimethyl sulfoxide, a hydroxyl scavenger, also inhibited the response. The scavengers were also tested against either the dilation produced by increased inspired CO2 or against the dilation produced by local application of 10(-3) M papaverine. No significant effect was observed. The data support the hypothesis that hydroxyl radicals can dilate pial arterioles, since all the scavengers can ultimately reduce levels of hydroxyl generated by acetaldehyde plus xanthine oxidase.

The Role of Oxygen-Free Radical in the Apoptosis of Enterocytes in Scalded Rats After Delayed Resuscitation

2004 ◽  
Vol 56 (3) ◽  
pp. 611-617 ◽  
Author(s):  
Cheng Zhang ◽  
Zhi-Yong (C. Y.) Sheng ◽  
Sen Hu ◽  
Jian-Chuan Gao ◽  
Jun-You Li ◽  
...  
Keyword(s):  
Free Radical ◽  
Oxygen Free Radical

The role of iron in oxygen-free radical damage during kidney storage at hypothermia

Cryobiology ◽  
1985 ◽  
Vol 22 (6) ◽  
pp. 614 ◽  
Author(s):  
B. Fuller ◽  
C. Green ◽  
G. Healing ◽  
S. Marley ◽  
S. Simpkin ◽  
...  
Keyword(s):  
Free Radical ◽  
Oxygen Free Radical ◽  
Free Radical Damage ◽  
Radical Damage

Development of ovarian follicles during lactation in rats

1986 ◽  
Vol 112 (2) ◽  
pp. 247-252 ◽  
Author(s):  
P. van der Schoot ◽  
W.J. de Greef
Keyword(s):  
Early Stage ◽  
Follicular Development ◽  
Ovarian Follicles ◽  
Advanced Stage ◽  
Unilateral Ovariectomy ◽  
Stage Of Lactation ◽  
Significant Prolongation ◽  
Large Numbers ◽  
Ovarian Follicular Development

Abstract. Ovarian follicular development was studied during lactation in rats. At an early stage of lactation (day 7) the ovaries showed only small follicles in agreement with the expected 'follicular quiescence' during lactation. However, at a more advanced stage of lactation (day 14), there were large follicles which were capable of ovulation in response to exogenous gonadotropins. Unilateral ovariectomy early during lactation (day 2) resulted in compensatory follicular development in the remaining ovary. However, doubling of the number of large follicles per ovary had not yet occurred by day 13. Unilateral ovariectomy caused a significant prolongation of the delay of embryonic implantation in pregnant lactating rats: this probably reflected delay of the development of sufficiently large numbers of oestrogen-producing follicles for this process. Unilateral ovariectomy did not affect the length of lactational pseudopregnancy. The findings indicate that 'follicular quiescence' during lactation in rats is limited to the very first period after parturition. This limitation may result from the relative ineffectiveness of suckling to suppress the secretion of FSH. In this respect, ovarian follicular development in rats differs from that in many other species, including primates and man.

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