ABSTRACT
Objective To evaluated the relationship between the genetic variations at IL-8 +2767 position with VL pathogenesis among Iranian patients. Methods Three groups including patients with VL clinical presentation and leishmania seropositive (n = 124), patients seropositive but without clinical presentation (n = 82) and healthy controls (n = 63) were selected to conduct this cross-sectional study. Polymorphism at +2767 position of IL-8 was investigated using PCR-RFLP techniques. Anti-leishmania antibody titration was evaluated by the immunoflorescence technique. Results We observed higher significant frequencies +2767 A/A and A/T genotypes in Group 1 compared to Group 2 and healthy controls (P = 0.001). Also, patients in Group 1 carrying A/A genotype showed higher titer of anti-leishmania antibody than patients with A/T and T/T genotypes (P = 0.05). The validity of the data was analyzed using Hardy–Weinberg equilibrium and one way analysis of variance (ANOVA), as well as χ
ABSTRACT
OBJECTIVE@#To evaluated the relationship between the genetic variations at IL-8 +2767 position with VL pathogenesis among Iranian patients.@*METHODS@#Three groups including patients with VL clinical presentation and leishmania seropositive (n = 124), patients seropositive but without clinical presentation (n = 82) and healthy controls (n = 63) were selected to conduct this cross-sectional study. Polymorphism at +2767 position of IL-8 was investigated using PCR-RFLP techniques. Anti-leishmania antibody titration was evaluated by the immunoflorescence technique.@*RESULTS@#We observed higher significant frequencies +2767 A/A and A/T genotypes in Group 1 compared to Group 2 and healthy controls (P = 0.001). Also, patients in Group 1 carrying A/A genotype showed higher titer of anti-leishmania antibody than patients with A/T and T/T genotypes (P = 0.05). The validity of the data was analyzed using Hardy-Weinberg equilibrium and one way analysis of variance (ANOVA), as well as χ tests.@*CONCLUSIONS@#Our findings indicate that the IL-8 +2767 polymorphism is significantly involved in impaired immune responses against VL and it could be considered as a risk factor for the VL progress.
ABSTRACT
Trichomonas vaginalis is the agent of urogenital tract infection that causes human trichomoniasis with some serious health complications. More under-standing about genetic features of the parasite can be helpful in the study of the pathogenesis, drug susceptibility and epidemiology of the infection. For this end, we conducted analysis of the actin gene of T. vaginalis by applying the PCR-SSCP [PCR-Single Stranded Conformational Polymorphism] and nucleotide sequencing method. Fifty T. vaginalis samples were collected from 950 women attending gynecology clinics in two cities of Iran, Hamadan and Tehran, from November 2010 to July 2011. After axenisation of isolates, all samples subjected to PCR-SSCP and nucleotide sequencing. According to the SSCP banding patterns and nucleotide sequencing, seven sequence types were detected among the isolates. Alignment of the nucleotide sequences showed five polymorphic sites in the different strain types. Amino acid substitution was not observed in the nucleotide sequence translation of the all sequences. The actin gene analysis represents genetic diversity of T. vaginalis and it suggests that various strains can be responsible for clinically different trichomoniasis in infected individuals. It is expected that further studies will be conducted to increase our knowledge about relationship between the actin gene polymorphism and different biological behavior of the parasite
ABSTRACT
Immune responses play critical roles in the leishmaniasis eradication. IL-10 is a key regulator of immune responses, and the polymorphisms within its promoter region are associated with alteration in its expression. Therefore, this study was designed to examine the correlation between polymorphism at the -1082 position of the IL-10 gene and visceral leishmaniasis [VL]. The IL-10 -1082 polymorphism and anti-Leishmania antibody titration were examined in 110 patients with clinical presentation of VL and seropositive for the Leishmania [group 1], 74 seropositive patients but without clinical presentation [group 2] and 113 healthy controls [group 3] using the PCR-RFLP and immunofluorescence techniques, respectively. The polymorphism at IL-10 -1082 [A/G] position was significantly associated with VL and A/G genotype was significantly higher in VL patients when compared to the groups 2 and 3 [P< 0.001]. However, the results demonstrated that the A and G alleles were not associated with VL [P= 0.263]. Previous investigations have shown that the polymorphism at the -1082 position of the IL-10 gene can influence its expression and also it has been proved that IL-10 level was increased during VL. Our results suggest that the A/G genotype may be considered as a risk factor for VL