Author(s): Regiani Nascimento Gagno Pôrto, Ana Paula Junqueira-Kipnis, Marco Antonio de Oliveira Viu, Rafaela Cavalcanti Teixeira, Maria Lucia Gambarini
Keywords:cow, Genital micoplasmosis, innate immunity, infection
Genital mycoplasmosis is a condition present in bovine production systems, and the most important agents involved are Mycoplasma bovis, Mycoplasma bovigenitalium and Ureaplasma diversum. Some aspects of their pathogenesis remain unclear. This study was designed in order to evaluate their ability to stimulate mononuclear cells from the endometrium, vagina and peripheral blood of cycling and healthy cows to produce nitric oxide (NO). Cellular cultures of endometrial, vaginal and peripheral blood cells from 33 healthy cows were cultivated with Mycoplasma bovis, Mycoplasma bovigenitalium and Ureaplasma diversum originated from the 4th passage in culture broth and the NO production was measured by the Greiss reaction. Confirmation of the presence of mononuclear cells and of the agents during and after the NO assay was done by Giemsa stained smears and further cultivation and detection by PCR reaction. Mononuclear cells from all samples produced NO. Mycoplasma bovigenitalium stimulated higher NO production than the others (p<0.05). Endometrial cells produced less NO than vaginal or blood cultured cells. In conclusion, it seems that Mycoplasma bovis, Mycoplasma bovigenitalium, and Ureaplasma diversum are able to activate mononuclear cells and induce the production of NO, thus suggesting that this pathway is elicited in response to the primary infection by these agents. More studies are necessary to verify why these agents remain in the bovine reproductive tract for long periods and how they reassume deleterious effects.
Journal Impact Factor 2020: 0.800
5-Year Impact Factor: 0.857
Indexing: Thomson Reuters/Science Citation Index Expanded, Zoological Record, Biosis Previews, Web of Science, Journal Citation Reports, Google Scholar, SCIndeks, KoBSON, Genamics, Journal Seek, Research Gate, DOAJ, Journal Rate, SJR – SCImago Journal & Country Rank, WorldCat, Academic Journals Database, Medical Journals Links, MedSci, Pubget