Yearly Variations in the Ovarian Cycle of the Lizard Sceloporus occidentalis

1975 ◽  
Vol 9 (2) ◽  
pp. 187 ◽  
Author(s):  
Stephen R. Goldberg
Keyword(s):  
Ovarian Cycle ◽  
Sceloporus Occidentalis

HISTOMORPHOLOGICAL CHANGES IN THE BRAIN IN RELATION TO OVARIAN CYCLE OF FRESHWATER CRAB, BARYTELPHUSA CUNICULARIS

2017 ◽  
Vol 23 (1) ◽  
Author(s):  
C.A. JAWALE
Keyword(s):  
Staining Intensity ◽  
Neurosecretory Cells ◽  
Ovarian Cycle ◽  
Secretory Product ◽  
Freshwater Crab ◽  
Intensity Index ◽  
Cytoplasmic Material ◽  
Histomorphological Changes ◽  
Cyclic Changes ◽  
The Brain

Ovarian maturation by neurosecretory cells in the brain of freshwater crab, Barytelphusa cunicularis have been examined. The histological scrutiny of the brain of Barytelphusa cunicularis related with three types (A, B and C) of neurosecretory cells, which are classified on the basis of size, shape and tinctorial characters. All these types of cells marked annual cyclic changes of cytoplasmic material in association with ovarian cycle. The activity of these cells has been correlated with the ovarian cycle. They are distinguishable by their size, nature locations, shape, nucleus position, cell measure and the secretory product in the cytoplasm. The result indicates that the neurosecretory A, B and C cells of the brain seen involved in the process of mating ovulation. The neurosecretory materials staining intensity index of these cells is described.

Ovarian cycle and plasma progesterone levels in the female stoat, mustela erminea

Reproduction ◽  
1972 ◽  
Vol 31 (3) ◽  
pp. 492-493 ◽  
Author(s):  
A. Gulamhusein ◽  
A. Thawley
Keyword(s):  
Ovarian Cycle ◽  
Mustela Erminea ◽  
Plasma Progesterone

scholarly journals Ovarian cycle stage critically affects 21-gene recurrence scores in Mmtv-Pymt mouse mammary tumours

BMC Cancer ◽  
2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Sarah M. Bernhardt ◽  
Pallave Dasari ◽  
Danielle J. Glynn ◽  
Lucy Woolford ◽  
Lachlan M. Moldenhauer ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Gene Expression ◽  
Menstrual Cycle ◽  
Recurrence Score ◽  
Gene Signature ◽  
Ovarian Cycle ◽  
Oncotype Dx ◽  
Mammary Tumours ◽  
Er Positive ◽  
The Impact

Abstract Background The Oncotype DX 21-gene Recurrence Score is predictive of adjuvant chemotherapy benefit for women with early-stage, estrogen receptor (ER)-positive, HER2-negative breast cancer. In premenopausal women, fluctuations in estrogen and progesterone during the menstrual cycle impact gene expression in hormone-responsive cancers. However, the extent to which menstrual cycling affects the Oncotype DX 21-gene signature remains unclear. Here, we investigate the impact of ovarian cycle stage on the 21-gene signature using a naturally cycling mouse model of breast cancer. Methods ER-positive mammary tumours were dissected from naturally cycling Mmtv-Pymt mice at either the estrus or diestrus phase of the ovarian cycle. The Oncotype DX 21-gene signature was assessed through quantitative real time-PCR, and a 21-gene experimental recurrence score analogous to the Oncotype DX Recurrence Score was calculated. Results Tumours collected at diestrus exhibited significant differences in expression of 6 Oncotype DX signature genes (Ki67, Ccnb1, Esr1, Erbb2, Grb7, Bag1; p ≤ 0.05) and a significant increase in 21-gene recurrence score (21.8 ± 2.4; mean ± SEM) compared to tumours dissected at estrus (15.5 ± 1.9; p = 0.03). Clustering analysis revealed a subgroup of tumours collected at diestrus characterised by increased expression of proliferation- (p < 0.001) and invasion-group (p = 0.01) genes, and increased 21-gene recurrence score (p = 0.01). No correlation between ER, PR, HER2, and KI67 protein abundance measured by Western blot and abundance of mRNA for the corresponding gene was observed, suggesting that gene expression is more susceptible to hormone-induced fluctuation compared to protein expression. Conclusions Ovarian cycle stage at the time of tissue collection critically affects the 21-gene signature in Mmtv-Pymt murine mammary tumours. Further studies are required to determine whether Oncotype DX Recurrence Scores in women are similarly affected by menstrual cycle stage.

Perching Behavior of Sceloporus occidentalis in Recently Burned Chaparral

Copeia ◽  
1974 ◽  
Vol 1974 (1) ◽  
pp. 256 ◽  
Author(s):  
Harvey B. Lillywhite ◽  
F. North
Keyword(s):  
Sceloporus Occidentalis

scholarly journals Ovarian cycle activity varies with respect to age and social status in free-ranging elephants in Addo Elephant National Park, South Africa

2013 ◽  
Vol 1 (1) ◽  
pp. cot025-cot025 ◽  
Author(s):  
E. W. Freeman ◽  
J. M. Meyer ◽  
S. B. Putman ◽  
B. A. Schulte ◽  
J. L. Brown
Keyword(s):  
South Africa ◽  
Social Status ◽  
National Park ◽  
Ovarian Cycle ◽  
Free Ranging

scholarly journals Influence of Hormonal Changes on Audiologic Examination in Normal Ovarian Cycle Females: An Analytic Study

2015 ◽  
Vol 20 (04) ◽  
pp. 294-299
Author(s):  
Indri Adriztina ◽  
Adlin Adnan ◽  
Ichwanul Adenin ◽  
Siti Haryuna ◽  
Sorimuda Sarumpaet
Keyword(s):  
Ovarian Cycle ◽  
Analytic Study ◽  
Hormonal Changes
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