Wyniki wyszukiwania

1

Simultaneous determination of plasma ovarian and thyroid hormones during sexual maturation of the hen [Gallus domesticus]

100%

Sechman A., Paczoska-Eliasiewicz H., Rzasa J., Hrabia A.

Folia Biologica

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2000

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tom 48

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nr 1-2

2

Female reproductive behaviour, ovarian hormones and vaginal cytology of the induced ovulator, Ctenomys talarum

84%

Fanjul M. S., Zenuto R. R.

Acta Theriologica

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2012

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tom 57

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nr 1

In the present study, we evaluated whether reproductive condition affects female reproductive behaviour in the induced ovulator Ctenomys talarum. We also explored the effect of the interaction with a male on the reproductive condition of females. To evaluate this, we arranged mating trials and evaluated female reproductive behaviour. Reproductive status of females was evaluated using a combined approach of vaginal smears, urinary progesterone and oestradiol, and ovarian histology. Behaviours denoting attraction (‘male sniff’ and ‘mount attempts’) and mutual courtship behaviours (‘spin’ and copula) were correlated with vaginal cytology before and oestradiol and progesterone levels in urine 12 h after male–female encounter. After 24 h of the interaction, oestradiol levels and vaginal epithelization increased while progesterone levels decreased in soliciting females. C. talarum females’ reproductive behaviour was related to its physiological reproductive state and vaginal cytology. The kind of male interaction, whether couples copulated or remained indifferent affected the later status of females. Females are induced ovulators by mating but male presence and interaction also affected other components of their reproductive physiology such as ovarian hormones and vaginal cytology.

3

Gene expression profiles of progestin-induced canine mammary hyperplasia and spontaneous mammary tumors

84%

Rao N. A. S., Van Wolferen M. E., Gracanin A., Bhatti S. F. M., Krol M., Holstege F. C., Mol J. A.

Journal of Physiology and Pharmacology. Supplement

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2009

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tom 60

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nr 1

73-84

Spontaneous mammary tumors are the most prevalent type of neoplasms in women as well as in female dogs. Although ovarian hormones estrogen and progesterone are known to play a key role in mammary tumorigenesis, conflicting reports have been obtained from in vivo and in vitro studies concerning the role of especially progesterone in mammary tumorigenesis. Prolonged exposure to high concentrations of progesterone during the unusually long luteal phase of the estrous cycle is suspected to be the key event in canine mammary tumorigenesis. Accordingly, previous studies have shown the development of mammary hyperplasia in dogs upon prolonged progestin administration. In this study, a dog-specific cDNA microarray was used to identify oncogenic determinants in progestin-induced canine hyperplasia (CMH) and spontaneous mammary tumors (CMC) by comparing expression profiles to those obtained from mammary glands of healthy dogs. The CMH profile showed elevated expression of genes involved in cell proliferation such as PCNA, NPY, RAN and also alterations in expression of transcription factors and cell adhesion molecules. Whereas in CMC, major alterations to the expression of genes involved in cell motility, cytoskeletal organization and extra cellular matrix production was evident besides differential expression of cell proliferation inducing genes. The overall gene expression profile of CMH was related to cell proliferation where as that of CMC was associated with both cell proliferation as well as neoplastic transformation. In conclusion, our findings support a strong cell proliferation inducing potential of progestins in the canine mammary gland. Moreover, deregulated genes identified in CMC are potentially involved in their malignant and may serve as prospective therapeutic targets.

4

The influence of steroids on the vascular tension of isolated superficial nasal and facial veins in gilts during sexual maturation

67%

Grzegorzewski W. J., Muszak J., Tabecka-Lonczynska A., Stefanczyk-Krzymowska S.

Polish Journal of Veterinary Sciences

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2010

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tom 13

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nr 2

5

Autonomic regulation of gastric myoelectrical activity in postmenopausal women supplemented with ovarian hormones

67%

Banach T., Thor P. J., Milewicz T., Krzysiek J.

Journal of Physiology and Pharmacology. Supplement

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2001

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tom 52

|

nr 2

6

Luteinizing hormone receptors and its mRNA in the bovine endometrium

51%

Shemesh M., Freidman S., Gurevich M., Stram Y., Fields M., Shore L. S.

Journal of Physiology and Pharmacology. Supplement

|

1996

|

tom 47

|

nr 1

Ograniczanie wyników

Simultaneous determination of plasma ovarian and thyroid hormones during sexual maturation of the hen [Gallus domesticus]

Female reproductive behaviour, ovarian hormones and vaginal cytology of the induced ovulator, Ctenomys talarum

Gene expression profiles of progestin-induced canine mammary hyperplasia and spontaneous mammary tumors

The influence of steroids on the vascular tension of isolated superficial nasal and facial veins in gilts during sexual maturation

Autonomic regulation of gastric myoelectrical activity in postmenopausal women supplemented with ovarian hormones

Luteinizing hormone receptors and its mRNA in the bovine endometrium