A preliminary study on placental damage associated to experimental neosporosis in BALB/c mice

Neospora caninum is a protozoan parasite which can infect a range of animals, including dogs, cattle, and sheep. Bovine neosporosis, which mainly causes abortion in cattle, results in substantial economic losses worldwide. To study the effects of N. caninum infection on the placenta, a pregnant mous...

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Veröffentlicht in:Parasitology research (1987) 2023-03, Vol.122 (3), p.781-788
Hauptverfasser: Tang, Zeyu, Li, Hang, Xie, Suzhu, Zhao, Shaowei, Zhang, Shuang, Wang, Hao, Li, Nanli, Zhang, Xuancheng, Zhao, Fanglin, Jia, Lijun
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container_issue 3
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container_title Parasitology research (1987)
container_volume 122
creator Tang, Zeyu
Li, Hang
Xie, Suzhu
Zhao, Shaowei
Zhang, Shuang
Wang, Hao
Li, Nanli
Zhang, Xuancheng
Zhao, Fanglin
Jia, Lijun
description Neospora caninum is a protozoan parasite which can infect a range of animals, including dogs, cattle, and sheep. Bovine neosporosis, which mainly causes abortion in cattle, results in substantial economic losses worldwide. To study the effects of N. caninum infection on the placenta, a pregnant mouse model for N. caninum infection was established. The litter size (8.6 ± 1.5) and the number of live pups (6.4 ± 1.8) of infected dams were significantly lower compared with those of non-infected dams. Trophoblast cell shrinkage and a large number of apoptosomes were detected in the placentas of the infected group. The parasite load in the placental tissue was significantly higher with time after infection. Likewise, apoptosis of placental trophoblast cells significantly increased with time after infection. Among the 66 apoptotic genes detected in this study, eight genes, including Bcl - 2 , were significantly differentially expressed by about > tenfold in infected and uninfected mice. The expression of BAX and tumor necrosis factor-alpha (TNF-α) was upregulated in the placental cells of the infected mice, whereas the expression of BCL-2 was downregulated. Enzyme-linked immunosorbent assays (ELISAs) showed that apoptotic protease caspase-3 level was significantly increased in placental cell suspension, and insulin-like growth factor (IGF)-2 level was significantly reduced. Acetylcholine (ACH) and placental prolactin (PL) levels were initially decreased but eventually increased. In summary, infection of mice with N. caninum caused apoptotic damage to the placental tissues, cells, and genes and affected the normal physiological functions of placenta, which may largely explain the adverse pregnancy outcomes caused by N. caninum infection in mice.
doi_str_mv 10.1007/s00436-022-07771-6
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subjects Animals
Apoptosis
Atrophy
Bcl-2 protein
Biomedical and Life Sciences
Biomedicine
Caspase-3
Cattle
Cattle Diseases - parasitology
Coccidiosis - veterinary
Dogs
Female
Immunology
Infections
Insulin
Insulin-like growth factors
Medical Microbiology
Mice
Mice, Inbred BALB C
Microbiology
Neospora - genetics
Neosporosis
Placenta
Placenta - parasitology
Pregnancy
Prolactin
Proto-Oncogene Proteins c-bcl-2
Sheep
Trophoblasts
Tumor necrosis factor-TNF
Tumor necrosis factor-α
title A preliminary study on placental damage associated to experimental neosporosis in BALB/c mice
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