الملخص
PURPOSE: The antiviral activity of Indian Medicinal plant extract Swertia chirata was tested against Herpes simplex virus (HSV) type-1, using multiple approaches both at cellular and molecular level. METHODS: Cytotoxicity, plaque reduction, virus infectivity, antigen expression and polymerase chain reaction (PCR) assays were conducted to test the antiviral activity of the plant extract. RESULTS: Swertia plant crude extract (1 gm/mL) at 1:64 dilution inhibited HSV-1, plaque formation at more than 70% level. HSV antigen expression and time kinetics experiments conducted by indirect immunofluorescence (IFA) test, revealed a characteristic pattern of small foci of single fluorescent cells in Swertia extract treated HSV-1 infected cells at 4 hours post infection dose, suggested drug inhibited viral dissemination. Infected cell cultures treated with Swertia extract at various time intervals, tested by PCR, failed to show amplification at 12, 24-72 hours. HSV-1 infected cells treated with Acyclovir (antiviral drug) did not show any amplification by PCR. CONCLUSIONS: In this preliminary study, the Indian medicinal plant extract, Swertia chirata showed antiviral properties against Herpes simplex virus type-1.
الموضوعات
Acyclovir/pharmacology , Animals , Antigens, Viral/metabolism , Antiviral Agents/pharmacology , Chlorocebus aethiops , Fluorescent Antibody Technique, Indirect , Herpesvirus 1, Human/drug effects , Humans , Plant Extracts/pharmacology , Plants, Medicinal/chemistry , Viral Plaque Assay , Polymerase Chain Reaction , Swertia/chemistry , Vero Cellsالملخص
During 1992-96, outbreaks of buffalopox zoonosis were reported from different villages in Jalgaon, Dhule and Beed districts of Maharashtra State. In humans, pox lesions were observed on the hands whereas in affected buffaloes and cows the lesions were noticed mainly on the teats and udder. Twenty two virus strains were isolated from the skin scabs collected from infected humans and milch animals. Neutralizing antibodies were detected not only in the sera of affected humans but also in their contacts. Detection of antibodies in young individuals from endemic area, who were neither vaccinated for smallpox nor had any contact with buffaloes or history of any poxvirus disease, is suggestive of occurrence of subclinical infection. A few children who had no contact with infected animals also showed clinical manifestations with disseminated lesions on the face, arm and buttocks, and thus suspected to have acquired infection through their infected parents or other family members indicating a possible man to man transmission. Therefore, in the light of discontinuation of smallpox vaccination, buffalopox outbreaks need to be monitored carefully as this may emerge as a serious zoonotic disease in India.
الموضوعات
Animals , Cattle , Chlorocebus aethiops , Disease Outbreaks , Female , Humans , India/epidemiology , Poxviridae Infections/epidemiology , Rabbits , Time Factors , Vero Cellsالملخص
A herbal hepatoprotective formulation Liv 52 down regulated the tumour necrosis factor (TNF) production in Charles Foster Rats treated with CCl4. Inhibition of TNF activity was proportional to the hepatoprotective activity.
الموضوعات
Animals , Carbon Tetrachloride Poisoning/metabolism , Down-Regulation/drug effects , Drug Combinations , Chemical and Drug Induced Liver Injury/metabolism , Plant Extracts/pharmacology , Plants, Medicinal , Rats , Tumor Necrosis Factor-alpha/biosynthesisالملخص
Administrations of hepatotoxicants namely carbon tetrachloride (CCl4:0.4 ml in 1.2 ml of liquid paraffin) and ANIT (1 ml of 1.5% solution in liquid paraffin) in Charles foster rats (force fed) and D-galactosamine (8 mg in water per swiss albino mouse, ip) induce the release of TNF-alpha in case of CCl4 and D-galactosamine. High TNF-alpha level was observed up to 48 hr in CCl4 and up to 24 hr in D-galactosamine treated animals. Elevated levels of biochemical like ALP and SGPT are also recorded. TNF-alpha level can be measured of tissue damage and prognosis in case of hepatitis.