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We examined the cytogenetic and genotoxic effects of the neonicotinoid insecticide imidacloprid and the organophosphate insecticide methamidophos, when administered alone or in combination. These insecticides were tested with the bone marrow chromosome aberration assay and micronucleus test in rats and by the bacterial mutation assay (Salmonella/microsome mutagenicity assay ... more

U. Karabay; G. Oguz
Lactation; Leptin; Pregnancy; Rat; Virgin

Leptin is expressed in various tissues, suggesting that this protein is effective not only at the central nervous system level, but also peripherically. Recent studies have shown leptin production by other tissues, including the placenta, stomach, and mammary tissues, but there is no information available concerning expression levels of leptin in the rat mammary gland at different activation ... more

Y.Y. Wang; Y.L. Wang; H.P. Li; H.S. Zhu; Q.D. Jiang; L. Zhang; L.F. Wang; L.Q. Han; K. Zhong; Y.J. Guo; W.F. Lu; H.J. Li; G.Y. Yang
Apoptosis; Heat stress; Hsp90α; Myocardial cells; Rat

To understand the mechanism underlying the sudden animal death caused by acute heart failure during heat stress, the relationships among the heat-induced pathological changes and apoptosis and the variations in the levels of protective Hsp90α and its mRNA in the heat-stressed primary myocardial cells of neonatal rats in vitro were studied by cytopathological observation, ... more

A. Islam; Y.J. Lv; A. Abdelnasir; B. Rehana; Z.J. Liu; M. Zhang; S. Tang; Y.F. Cheng; H.B. Chen; J. Hartung; E.D. Bao
Duodenum; FoxO; IGF-1; Rat; Signaling pathway

The insulin growth factor 1/phosphatase and tensin homologue deleted on chromosome 10/Akt/forkhead box (IGF-1/PTEN/Akt/FoxO) signaling pathway reportedly exhibits gastroprotective effects by reducing water immersion and restraint stress (WRS)-induced gastric mucosal cell apoptosis. We examined the expression and localization of IGF-1, PTEN, Akt, and FoxO proteins, caspase-3 activity, and ... more

P. Huang; Z.R. Zhou; M.Q. Zheng; F.X. Shi
Heat stress; Hsp60; In vivo and in vitro cell culture; Myocardial cell; Rat

To investigate the protective role of Hsp60 against stress damage and its role in the sudden death of stressed animals, changes in the levels of Hsp60 protein and hsp60 mRNA of myocardial cells in vivo and in vitro were studied. In addition, the relationship between Hsp60 expression and heat-induced damage was also studied. Rats were exposed to a temperature of ... more

Y.F. Cheng; J.R. Sun; H.B. Chen; A. Abdelnasir; S. Tang; N. Kemper; J. Hartung; E.D. Bao
Cardiovascular protection; Hyperlipidemia; Intermedin; Ischemia-reperfusion injury; Myocardial; Rat

Hyperlipidemia is a well-established risk factor for the development of coronary atherosclerosis, while intermedin (IMD) has been identified as a novel calcitonin/calcitonin gene-related peptide family member involved in cardiovascular protection. However, whether IMD protects against hyperlipidemia-associated myocardial ischemia/reperfusion (MI/R) injury is unknown. We established a ... more

S.M. Yang; J. Liu; C.X. Li
DNA vaccine; Inhibin; Ovary; Rat; Salmonella choleraesuis

DNA vaccination has been studied intensively as a potential vaccine technology. We evaluated the effect of an attenuated Salmonella choleraesuis-mediated inhibin DNA vaccine in rats. First, 15 rats were treated with different doses of an inhibin vaccine to evaluate vaccine safety. Next, 30 rats were divided into 3 groups and injected intramuscularly with the inhibin vaccine two ( ... more

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Cyclic GMP; Granulosa cell; Ovary; Phosphodiesterase; Rat

Guanosine 3',5'-cyclic monophosphate (cGMP), as a second messenger, plays potential roles in ovarian functions. To elucidate the role of phosphodiesterase (PDE) in cGMP signaling during ovarian follicular development, the present study was conducted to investigate ovarian cGMP level and cGMP-PDE activity by radioimmunoassay (RIA) in postnatal rats, immature rats during gonadotropin- ... more

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Acrylonitrile; Apoptosis; Brain neuron; Neuron morphology; Rat

This study aimed to evaluate the effects of acrylonitrile (ACN) on neuronal morphology and apoptosis in rats. An ACN solution was administered to Wistar rats by gavage at doses of 0, 5, 10, or 20 mg/kg, 5 days a week for 13 weeks. The morphology of neurons and the presence of apoptosis was examined by light and electron microscope, DNA electrophoresis, immunohistochemistry, and terminal ... more

C.Z. Li; L.A. Tse; Y.L. Zhou; W. Fan; M. Li; I.T.S. Yu; T.Y. Jin
BMP-7; Epithelial-mesenchymal transition; Liver fibrosis; Rat; TGF-β1

This study was designed to show whether rat liver epithelial cells could undergo epithelial-mesenchymal transition (EMT), thereby directly contributing to liver fibrosis. The role of the ratio of transforming growth factor-β1 (TGF-β1)/bone morphogenetic protein-7 (BMP-7) was evaluated in the progression of EMT or mesenchymal-epithelial transition. Primary rat liver epithelial cells were ... more

W.R. Bi; G.T. Xu; L.X. Lv; C.Q. Yang