17ß Estradiol Modulates Perfusion Pressure and Expression of 5-LOX and CYP450 4A in the Isolated Kidney of Metabolic Syndrome Female Rats.

Prevalence of metabolic syndrome and progression of nephropathy depend on sex. We examined a protective effect of estradiol against nephropathy in metabolic syndrome through the modulation of the arachidonic acid metabolism by activating the 5-lipoxygenase and cytochrome p450 4A pathways. 28 female Wistar rats were divided into four groups of seven animals each: control, intact metabolic syndrome, ovariectomized metabolic syndrome, and metabolic syndrome ovariectomized plus estradiol. Blood pressure, body weight, body fat, triglycerides, insulin, HOMA-index, albuminuria, and TNF-α were increased in ovariectomized metabolic syndrome rats (p < 0.001). The perfusion pressure in isolated kidneys of ovariectomized metabolic syndrome rats in presence of 4 µg of arachidonic acid was increased. The inhibitors of the arachidonic acid metabolism Baicalein, Miconazole, and Indomethacin in these rats decreased the perfusion pressure by 57.62%, 99.83%, and 108.5%, respectively and they decreased creatinine clearance and the arachidonic acid percentage. Phospholipase A2 expression in the kidney of ovariectomized metabolic syndrome rats was not modified. 5-lipoxygenase was increased in metabolic syndrome ovariectomized rats while cytochrome p450 4A was decreased. In conclusion, the loss of estradiol increases renal damage while the treatment with estradiol benefits renal function by modulating arachidonic acid metabolism through the 5-lipoxygenase and cytochrome p450 4A pathways.

The porcine circovirus type 1 in porcine kidney 15 cell line is not transferred to mice lymphoid cells after xenoimplantation into the peritoneal cavity.

The porcine circovirus type 1 (PCV1) has been identified within lymphoid tissues of experimental infected pigs and suggested to induce an immunosuppressive stage in pigs. The virus does not induce a cytophatic effect in the pig-derived cell line PK-15. Because PCV1 is prevalent in many pig cells and tissues, the risk of inducing a viral xenozoonosis by PCV1 was raised for the xenoimplantation of pig cells into human hosts. The present work evaluated if PCV1 is able to replicate in mice tissues after xenoimplantation of PCV1-infected pig cells. Active growing PK-15 cells harboring PCV1 with or without microencapsulation in sodium alginate were implanted into the peritoneal cavity of mice. After 1 month postimplantation in mice, peritoneal macrophages, spleen, and lymph nodes were harvested and analyzed with the polymerase chain reaction technique (PCR). No evidence of circovirus type 1 DNA was detected within the mice tissues.