Biochemical view on the effect of hepatitis delta virus infection on expression of hepatitis B virus in blood donors

One thousand voluntary blood donors attending the Blood Bank of Medical Research Institute, Alexandria University were enrolled in the present study. Sera from blood samples were separetd for screening of HBsAg using ELISA technique. Screening of 200 1-IBsAg negative blood samples for past exposure to HBV infection was also performed through the detection of anti-HBc using specific ELISA kit. Determination of ALT and AST revealed a significant increase among HBsAg positive group while, Malondialdehyde [MDA] detection revealed the absence of the causative relationship between MDA and liver injury. On the other hand, no anti-HDV could be found among the HBsAg-ve/anti-HBc+ve group of blood donors [46 cases]. PCR analysis for HBV-DNA was performed in the chosen 24 serum samples. None of them was positive for HBV-DNA regardless their positively or negativity to the different serologic markers studied

Kupffer cell count and plasma fibronectin level in hepatic schistosomiasis with and without virus hepatitis

The aim of this work was to study some kupffer cell receptors which influence their immunophagocytic capacity in relation to the levels of circulating immune complexes [CICs] and plasma fibronectin [PFN] in four groups of patients: early or late schistosomiasis and schistosomiasis associated with virus B or C infection as compared to a control group. Patients were diagnosed on clinical basis together with ultrasonography and various laboratory tests. Liver biopsies were obtained to confirm the diagnosis and provide Kupffer cells. After dispersion, total nucleated cells and liver macrophage counts were found to be elevated in early schistosomiasis compared to the other groups. The number and percent of Kupffer cells carrying Fc or complement receptors were significantly higher in early schistosomiasis as compared to all other groups, yet by referring to normal values as reported in the literature the percent carrying, receptors could be considered lower than normal. The CICs were higher in all groups than control. The levels were lower in early Schistosomiasis and highest in patients with mixed infection particularly in those with HBV. There was a negative correlation between CICs levels and the number and proportion of Kupffer cells carrying receptors. Plasma fibronectin [PFN] showed a significant increase in early schistosomiasis patients and a significant decrease in patients with schistosomiasis combined with virus hepatitis particularly HCV; compared to controls. Positive correlation was detected between PFN level and the number and percent of Kupffer cells carrying Fc and complement receptors. No correlation was found between PFN and CICs in all groups. It could be concluded that during early schistosomiasis, there is an increase in the immunophagocytic function of Kupffer cells. In chronic schistosomiasis a decreased activity was noted probably due to immunomodulation and fibrosis. In schistosomiasis associated with HBV or HCV, the function of Kupffer cells was markedly decreased. This is probably due to affection of the hepatocytes leading to lower FN level and increased CICs which may block the receptors. The marked lowering of PFN in schistosomiasis associated with HCV could be explained by the direct cytopathic effect of the virus

Hepatitis B virus seromarkers among Egyptian pesticide applicators

It is evident that HBV infection is quite prevalent in Egypt and is a public health problem. This study was conducted on a group of pesticide applicators from different Egyptian governorates: 159 Subjects from upper Egypt [South]. 152 Subjects from lower Egypt [North], and 87 Subjects as control. Hepatitis B seromarkers [HBsAg, anti-HBc and anti-HBs] were detected by using ELISA technique, besides doing some liver function tests [SGOt, SGPT and S. Cholinesterase]. Abdominal ultrasonography was done for 246 subjects to evaluate thickness of portal tracts [hepatic schistosomiasis] and the other echo pattern of the liver. The frequency of carriers [HBsAg] was 7.4%; immune [antiHBs and anti-HBc] was 51%, remote post exposure [anti-HBs] was 13.8%. and window phase [anti-HBc] was 7.7%.Results showed that both the carrier infection rates increased with age between 20-39 years, however, the rates decreased with ages >40 years. The carrier rate among bilharzial liver cases [57.89%] was higher than in non-bilharzial liver cases [12.11%]. On the other hand, the infection rate was higher in non-bilharzial liver cases [54.64%] than in bilharzial liver cases. The percent of coarse liver pattern [by ECHO] among carriers [10.53%] was higher than that for the non-infected subjects [2.27%]. This denotes the pathological effect of hepatitis B virus on the liver