GPRC5B protects osteoarthritis by regulation of autophagy signaling

Osteoarthritis (OA) is one of the most common chronic diseases in the world. However, current treatment modalities mainly relieve pain and inhibit cartilage degradation, but do not promote cartilage regeneration. In this study, we show that G protein-coupled receptor class C group 5 member B (GPRC5B), an orphan G-protein-couple receptor, not only inhibits cartilage degradation, but also increases cartilage regeneration and thereby is protective against OA. We observed that Gprc5b deficient chondrocytes had an upregulation of cartilage catabolic gene expression, along with downregulation of anabolic genes in vitro. Furthermore, mice deficient in Gprc5b displayed a more severe OA phenotype in the destabilization of the medial meniscus (DMM) induced OA mouse model, with upregulation of cartilage catabolic factors and downregulation of anabolic factors, consistent with our in vitro findings. Overexpression of Gprc5b by lentiviral vectors alleviated the cartilage degeneration in DMM-induced OA mouse model by inhibiting cartilage degradation and promoting regeneration. We also assessed the molecular mechanisms downstream of Gprc5b that may mediate these observed effects and identify the role of protein kinase B (AKT)-mammalian target of rapamycin (mTOR)-autophagy signaling pathway. Thus, we demonstrate an integral role of GPRC5B in OA pathogenesis, and activation of GPRC5B has the potential in preventing the progression of OA.

ABO Blood Group & Periodontitis: Correlation or No- Relation.

Background: The purpose of the present study was to determine whether there was a relationship between periodontal diseases and ABO blood groups. Methods: This epidemiological study was carried out on 300 subjects who were randomly selected from individuals referred to the periodontics of Ahmedabad Dental College & Hospital for periodontal treatment or for other reasons regarding dental health. The study based on periodontal condition, blood group. The effects of blood subgroups on periodontal health, gingivitis and Periodontitis were investigated separately. Results: The findings of our study revealed that subject’s blood group “O” and “B”, Rh positive had a greater propensity for periodontitis followed by blood group A and least prevalent is blood group AB. Conclusions: ABO blood subgroups and Rh factor may constitute a risk factor on the development of periodontal disease.

Contaminação por Salmonella spp. em uma cadeia de produção de ovos de uma integração de postura comercial / Salmonella contamination in an egg production chain of a laying hens integration

Contamination of ISA BROWN layer hens by Salmonella spp. and serotyping of the isolated strains were performed in 30 farms. Salmonella detection was done from feces and cloaca swabs. Eggs produced in the farms contaminated by Salmonella spp. were analyzed by culturing the shell rinsing and egg yolk. Salmonella spp. was isolated in eight (23.0 percent) farms, but was not detected from eggs. S. Enteritidis, which is the most prevalent sorotype associated to human salmonelosis in Paraná State, was not isolated either from birds or eggs analyzed. The sorotypes isolated were Salmonella enterica subsp. enterica (0:3.10) (67.0 percent), Mbandaka (11.0 percent), Infantis (11.0 percent), and Newport (11.0 percent).