anti-inflammatory properties of interleukin 18 binding protein in rheumatoid arthritis

Interleukin-18 binding protein [IL-18BP] is functioning as a natural anti-inflammatory and immunosuppressive molecule by neutralizing the effects of IL-18 during inflammation. This study aimed to identify the role of IL-18BPa in the regulation of immune responses associated with the pathogenesis of RA. 65 RA patients, 22 OA patients, and 40 sex and age matched healthy donors were enrolled in this study. Synovial specimens were obtained through synovectomy or arthroscopic procedures. SFMC and PBMC were prepared by using Ficoll-Hypaque separation procedure. Superarray analysis was used to measure the expression profile of immune-related genes in normal PBMC treated with recombinant human IL-18BPa. The mRNA levels of Th1 and Th2 cytokines were measured by Real-time PCR, and the protein levels of IFN-gamma, IL-4 were detected by ELISA. SuperArray analysis of immune related gene expression profile in normal PBMC treated with IL-18BPa indicated decreases in the gene expression of IFN- gamma and its regulatory molecules STAT-1 and STAT-2. This study pointed out that IL-18BPa has additional anti-inflammatory property through downregulating the expression of IFN- gamma and IL-12, at the same time, upregulating the expression of IL-4 and IL-10. Both IFN- gamma and IL-12 could upregulate the mRNA and protein levels of IL-18BPa in both the normal and RA subjects. Our results demonstrated the importance of IL-18BPa as an immune regulatory molecule and as a promising therapy for treating RA

In vitro study assessing the response of plasmodium falciparum malaria to chloroquine, sulfadoxine/pyrimethamine, quinine and mefloquine in Wad Medani district, Sudan

To assess the in vitro response of Plasmodium falciparum malaria to chloroquine [CQ], sulfadoxine/pyrimethamine [SDX/PYR], Quinine [QU] and Mefloquine [MQ] and monitoring their resistance. In 1999 to 2000, an in vitro study was carried out in Wad Medani district in Sudan. The standard protocol of the WHO in vitro micro-test Mark II was used for the selection of the subjects, the collection of blood samples, the culture techniques, the examination of the post-culture blood slides and the interpretation of the results. In vitro micro-test Mark II were performed on 62 Plasmodium falciparum isolates. Of these isolates, 42 produced successful schizonts growth. The data obtained showed that 29 of 42 isolates [69%] were CQ resistant with an effective concentrations [EC]; EC50 = 399.621 nM, EC90 = 2754.145 nM and EC99 = 13284.967 nM to inhibit the schizont maturation, the values of SDX/PYR showed a flat regression line as an indication of in vitro reduced response with an EC50 = 0.262 nM, EC90 = 147.390 nM and EC99 = 25722.296 nM, and the response to the QU indicated only one of the 42 isolates [2.4%] was resistant with an EC50 = 150.085 nM, EC90 = 822.825 nM and EC99 = 3293.667 nM, while all the 42 isolates were sensitive to MQ with an EC50 = 190.763 nM, EC90 = 615.125 nM and EC99 = 1597.504 nM. The results of this study revealed a high degree of in vitro resistance to CQ and reduced in vitro response to SDX/PYR and QU, while MQ was fully sensitive. The effective concentrations to inhibit 50, 90 and 99% of the parasite maturation were determined for antimalarial drugs efficacy monitoring surveillance in Sudan

Schistosoma mansoni associated mortaiity in Gezira: Determined by clinical and ultrasound examination

Schistosomiasis is the most common problem in Gezira area. The prevalence among school children could reach up to 90% in some villages. This study was conducted in a small village in the Gezira area in central Sudan. This part of the Gezira is well known for its high endemicity of Bilharzia. A total of 428 individuals were included in the study. All were examined clinically and by Ultrasoungraphy for spleen and liver. Stoll specimens were also taken from all the subjects and were examined for Schistosoma mansoni ova. The prevalence of schistosomasis was found to be 72% in males and 68 3% in females. It was also observed that the overall prevalence of splenomegaly on the examined subjects was 35.8%. Males recorded higher prevalence of splenomegaly [38.8%] compared to females [32.7%] [p =/< 0.05]. The observed prevalence of hepatomegaly was 12.6%., with high prevalence among males [13.1%] compared to females [11.2%]. Out of the 406 subjects examined by ultrasound, 266 [63.1%] were found to have evidence of periportal fibrosis. The hepatomegaly in the different grades1.2 and 3 are 12.6%, 3.8% and 0% respectively. It is clear from the above data that the size of the spleen increases while the size of the liver decreases with the severity of periportal fibrosis

Regression of liver fibrosis in Schistosoma mansoni infected Sudanese subjects after praziquantel treatment

1-To evaluate the effect of Praziquantel [PZQ] therapy on the regression of liver fibrosis in an endemic population. 2-To determine the factors controlling the regression of hepatic fibrosis [e.g. gender, age and grade of fibrosis]. An association study of a cohort of one hundred seventy seven Sudanese patients infected with Schistosoma mansoni [82 males 46%, 95 females 54%] was conducted to evaluate the factors controlling the regression of liver fibrosis 39 months after treatment with PZQ using ultrasound evaluation. SPSS [Statistical Package for Social Science] software was used for statistical analysis. Chi- Square was used to compare the two phenotypes [regression and progression] in the study subjects. PPF was regressed in 63 patients [36%] from higher grades of fibrosis to lower ones. While in 24 patients [13%] the disease progressed to higher grades. In addition, the grade of PPF did not change in 90 patients [51%]. The mean values of portal vein diameter [PVD], splenic vein diameter [SVD], and index liver size [ILS] in subjects in whom PPF regressed after treatment were significantly lower than in subjects in whom the disease was progressed [P <.0001, P =.031, and P =.003 respectively].The progression of hepatic fibrosis in males [n = 15.18%] was greater than that of females [n = 9.9%]. Patients who showed regression of PPF or progression of the disease tend to cluster in certain families. Our study indicated that regression and stabilization of PPF after PZQ therapy is controlled by gender, age, grade of fibrosis, and possibly inherited factors