The golden hamster is an attractive model organism for studying reproductive physiology, oncology, genetics and virology. In an effort to establish experimental protocols necessary for cloning golden hamsters, we examined changes in the reciprocal position of the FPB (first polar body) and chromosome set of MII (the second meiotic metaphase) oocytes of golden hamsters. Oocytes were collected un...

In the present study, changes in localization of nerve growth factor (NGF) and its receptors, trkA and p75 in the ovary were investigated during the estrous cycle of the golden hamster. The effect of LH surge on changes in localization of NGF, trkA and p75 in the ovary was also investigated. NGF and its receptors trkA and p75 were localized in oocytes, granulosa cells and theca cells of various...

We have developed a qualitative and quantitative assay system for detecting cells lacking postconfluence inhibition of cell division (contact insensitivity, CS~) in golden Syrian ham ster embryo cells in culture by measuring the number of cells able to form colonies on a lethally irradiated, confluent monolayer of a contact-sensitive established cell line. A subpopulation in normal low-passage ...

The golden hamster (Mesocricetus auratus) has been a model organism for the study of circadian rhythmicity and, in particular, the effects of age on the circadian system. Surprisingly, nothing is known about the effects of advanced age on sleep in this species. As a first step in determining the effects of aging on sleep in the golden hamster, we recorded sleep for 24 hours in 12 young (3 month...

BACKGROUND Previous results have shown that oral and intranasal administration of particulate Leishmania (Leishmania) amazonensis antigens (LaAg) partially protects mice against L. amazonensis infection. However, vaccination studies on species of the subgenus Viannia, the main causative agent of cutaneous and mucosal leishmaniasis in the Americas, have been hampered by the lack of easy-to-handl...

Two ayurvedic preparations Arogya Vardhini Bati (AVB) and Anand Bhairava Ras (ABR) were found to cure intestinal amoebiasis of rat and hepatic amoebiasis of golden hamster. Both AVB and ABR were found to be amoebicidal against trophozoites of Entamoeba histolytic at 500 μg/ml in vitro and cured caecal amoebiasis of rat at 200 mg/kg/dose/5 dyas, in vivo.

1 Professor de Semiologia e Clínica Médica – FFALM – Bandeirantes – PR e Doutorando do Depto. de Reprodução Veterinária e Radiologia Animal -FMVZ-UNESP/Botucatu – SP. Endereço para correspondência: Hospital Veterinário FFALM, BR 369, Km 54, Cx. Postal: 261, Bandeirantes PR, 86360-000. 2 Faculdade de Medicina Veterinária e Zootecnia (FMVZ) – Universidade Estadual Paulista (Unesp), Distrito de Ru...