Sumarno Reto Prawiro

The Effect of Lactobacillus reuteri on the Percentage of Th17 Cells and Level of IL-17 in Staphylococcus aureus-Induced Puerperal Infection BALB/c Mice

Background: Puerperal infection is an infection of the reproductive tract during labor or puerperal period, which is largely caused by Staphylococcus aureus infection resulting in Toxic Shock Syndrome (TSS). The prevalence of postpartum infection has increased over the past three years, coupled with an increase in Staphylococcus aureus (MRSA) Methicillin Resistant, resulting in high treatment costs and high morbidity and mortality rates. Objective: This study aimed to determine the effect of Lactobacillus reuteri on the percentage of Th17 cells and the level of IL-17 in Staphylococcus aureus-induced puerperal BALB/c mice. Methods: Mice were divided into 4 groups with each group consisting of 4 mice in puerperal period and 4 mice in three days postpartum period; Group I (mice were induced with Staphylococcus aureus at 0–12 hours postpartum), Group II (mice were administered orally with Lactobacillus reuteri), Group III (mice were treated with Lactobacillus reuteri and Staphylococcus aureus) and group IV (control). The percentage of Th17 cells was measured by Flow cytometry method, while the level of IL-17 was measured by ELISA method. Results: The results showed that the administration of Lactobacillus reuteri significantly influenced the percentage of Th17 cells and the levels of IL-17 in Staphylococcus aureus-induced puerperal mice. Conclusion: In summary, Lactobacillus reuteri may act as a preventive agent of puerperal infections in Staphylococcus aureus-induced mice during the puerperal period and three days postpartum.

Antibodies against Shigella flexneri adhesion molecule outer membrane protein (OMP) can cross-react with OMPs of some Shigella species

Purpose: To identify a Shigella flexneri hemagglutinin outer membrane protein (OMP) as an adhesion factor and examine its ability to cross-react with the OMPs of other Shigella species. n nMethods: OMP was isolated from the bacterium S. flexneri after shaving the pili using a pili bacterial cutter in a solution of 0.5 % n-octyl-β-D-glucopyranoside. Hemagglutination was evaluated using mice erythrocytes. The molecular weight (MW) of the OMPs was profiled by SDS-PAGE. Adhesion molecules were identified by calculating the index of adhesion. Thereafter, antigen cross-reaction with antibodies was examined by Western blotting. n nResults: The S. flexneri adhesion molecule OMP has a MW of 28 kDa. An antibody against the 28 kDa S. flexneri OMP adhesion molecule cross-reacted with different MW OMPs from other Shigella species. n nConclusion: This study showed that the 28 kDa S. flexneri OMP is a hemagglutinin adhesion protein, and antibodies against it can cross-react with the OMPs of other Shigella species.

Group A β-hemolytic Streptococcus Detection Using Anti-Outer Membrane Protein (OMP) Immunoglobulin G (IgG)

Streptococcal pharyngitis sequel such as Rheumatic Fever (RF) or Rheumatic Heart Disease (RHD) is an autoimmune response mediated by T cells and IgG. Since it is an autoimmune process, the result of bacterial culture as the gold standard of diagnosis often shows negative results. IgG against the 33 kDa OMP is considered as an important mediator in the process of these autoimmune diseases, so its presence in blood serum can be used as a diagnostic tool. The purpose of this study is to prove that 33 kDa OMP is one of the immunogenic parts of the Streptococcus Group A β-hemolytic, so it is expected that IgG anti-33 kDa OMP can recognize and respond the bacteria and to support the probability of the Streptococcus Group A β-hemolytic infection. This study was a laboratory experimental study with a control group design. Animal used was RattusNovergicus immunized with whole cell bacteria or 33 kDa OMP mixed with Complete Freund’s Adjuvant or Incomplete Freund’s Adjuvant. Polyclonal IgG was obtained by drawing blood serum from the animals after immunization with Streptococcus Group A β-hemolytic for 4 weeks (A; n = 5) and 8 weeks (B; n = 5) or immunization with OMP 33 kDa for 4 weeks (C; n = 5) and 8 weeks (D; n = 5) and also negative control group (E; n = 5). Immunological tests were done using Dot Blot assay, ELISA, and immunocytochemical examination. The data obtained was then evaluated with statistical tests Kruskal-Wallis, Mann-Whitney and Repeated ANOVA (p 0.05). Dot Blot and immunocytochemical tests indicated that IgG anti-33 kDa OMP were able to recognize and respond the Streptococcus Group A β-hemolytic antigen. This study concluded that 33 kDa OMP was the immunogenic part of the bacteria and that IgG anti-33 kDa OMP could recognize and respond the Streptococcus Group A β-hemolytic bacteria.

Adhesin 49.4 Kda of Porphyromonas Gingivalis Outer Membrane Protein on Neutrophil

1 Siti Nurul Mubarokah, 2 I Ketut Gede Muliartha, 3 Edi Widjajanto, 4 Sanarto Santoso, 5 Sumarno Reto Prawiro Laboratory of Biochemistry, Medical Faculty of Malang Islamic University Malang Laboratory of Clinical Anatomy and Pathology, Medical Faculty of Brawijaya University Malang Laboratory of Clinical Pathology, Medical Faculty Brawijaya University Malang Laboratory of Microbiology, Medical Faculty of Brawijaya University Malang