Somnath Chakraborty1, Upasana Ghosh1, Thangavel Balasubramanian1, Punyabrata Das2. 1. Faculty of Marine Sciences, Annamalai University, Parangipettai - 608 502, Tamil Nadu, India. 2. National Bureau of Fish Genetic Resources, Indian Council of Agricultural Research, Canal Ring Road, P.O. Dilkusha, Lucknow 226002, Uttar Pradesh, India.
Abstract
OBJECTIVE: To screen, isolate and optimize anti-white spot syndrome virus (WSSV) drug derived from various marine floral ecosystems and to evaluate the efficacy of the same in host-pathogen interaction model. METHODS: Thirty species of marine plants were subjected to Soxhlet extraction using water, ethanol, methanol and hexane as solvents. The 120 plant isolates thus obtained were screened for their in vivo anti-WSSV property in Litopenaeus vannamei. By means of chemical processes, the purified anti-WSSV plant isolate, MP07X was derived. The drug was optimized at various concentrations. Viral and immune genes were analysed using reverse transcriptase PCR to confirm the potency of the drug. RESULTS: Nine plant isolates exhibited significant survivability in host. The drug MP07X thus formulated showing 85% survivability in host. The surviving shrimps were nested PCR negative at the end of the 15 d experimentation. The lowest concentration of MP07X required intramuscularly for virucidal property was 10 mg/mL. The oral dosage of 1 000 mg/kg body weight/day survived at the rate of 85%. Neither VP28 nor ie 1 was expressed in the test samples at 42nd hour and 84th hour post viral infection. CONCLUSIONS: The drug MP07X derived from Rhizophora mucronata is a potent anti-WSSV drug.
OBJECTIVE: To screen, isolate and optimize anti-white spot syndrome virus (WSSV) drug derived from various marine floral ecosystems and to evaluate the efficacy of the same in host-pathogen interaction model. METHODS: Thirty species of marine plants were subjected to Soxhlet extraction using water, ethanol, methanol and hexane as solvents. The 120 plant isolates thus obtained were screened for their in vivo anti-WSSV property in Litopenaeus vannamei. By means of chemical processes, the purified anti-WSSV plant isolate, MP07X was derived. The drug was optimized at various concentrations. Viral and immune genes were analysed using reverse transcriptase PCR to confirm the potency of the drug. RESULTS: Nine plant isolates exhibited significant survivability in host. The drug MP07X thus formulated showing 85% survivability in host. The surviving shrimps were nested PCR negative at the end of the 15 d experimentation. The lowest concentration of MP07X required intramuscularly for virucidal property was 10 mg/mL. The oral dosage of 1 000 mg/kg body weight/day survived at the rate of 85%. Neither VP28 nor ie 1 was expressed in the test samples at 42nd hour and 84th hour post viral infection. CONCLUSIONS: The drug MP07X derived from Rhizophora mucronata is a potent anti-WSSV drug.
Authors: Y Takahashi; M Kondo; T Itami; T Honda; H Inagawa; T Nishizawa; G I Soma; Y Yokomizo Journal: Fish Shellfish Immunol Date: 2000-08 Impact factor: 4.581
Authors: M Premanathan; R Arakaki; H Izumi; K Kathiresan; M Nakano; N Yamamoto; H Nakashima Journal: Antiviral Res Date: 1999-12-15 Impact factor: 5.970