title: [Effect of extracted ZG from gardenia on Hep-2 cell membrane post infected with parainfluenza virus type 1 (PIV-1)].
abstract: In order to study the anti-viral mechanism of extracted ZG from Gardenia, the effect of extracted ZG on Hep-2 cell membrane potential, Na -K+-ATPase activity and membrane fluidity post infected with parainfluenza virus type 1 (PIV-1) was observed. Acetylcholine which was fluorescent labeled with DiBAC4 (3) was taken as positive control to observe the changes of membrane potential and was measured by flow cytometer. The phosphorus determination method and spectrophotometer were used to measure the Na+-K+-ATPase activity of Hep-2 cell membrane post PIV-1 infection. Hep-2 cell membrane phospholipids was labeled with fluorescent NBD-C6-HPC and membrane fluidity was measured by confocal laser scanning microscope. The results demonstated that after PIV-1 infection the Hep-2 cell membrane potential decreased significantly and the membrane was in the state of hyperpolarization, Na+-K+-ATPase activity increased and membrane fluidity decreased significantly. There was no apparent interferring effect of extracted ZG on the changes of membrane potential and Na+-K+-ATPase activity post PIV-1 infection, while membrane fluidity was improved significantly. Acetylcholine improved the state of hyperpolarization. The changes of membrane potential, Na -K+-ATPase activity and membrane fluidity might be the biomechanism of PIV-1 infectoin. The extracted ZG improved membrane fluidity to prevent from PIV-1 infection by protecting the cell membrane, which was probably the mechanism of anti-PIV-1 activity of the extracted ZG, but ZG probably had nothing to do with membrane potential and Na+-K+-ATPase activity.
authors.affiliation: Institute of Chinese Meteria Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
authors.forename: Shan-Shan
authors.initials: SS
authors.lastname: Guo
authors.forename: Yang
authors.initials: Y
authors.lastname: Huang
authors.forename: Ye
authors.initials: Y
authors.lastname: Zhao
authors.forename: Ying-Jie
authors.initials: YJ
authors.lastname: Gao
authors.forename: Wen-Feng
authors.initials: WF
authors.lastname: Gong
authors.forename: Xiao-Lan
authors.initials: XL
authors.lastname: Cui
mesh_terms: D000109:Acetylcholine / Q000494:pharmacology; D000998:Antiviral Agents / Q000494:pharmacology*; D045744:Cell Line, Tumor; D002462:Cell Membrane / Q000187:drug effects*; D032062:Gardenia / Q000737:chemistry*; D006801:Humans; D008560:Membrane Fluidity / Q000187:drug effects; D008564:Membrane Potentials / Q000187:drug effects; D010222:Parainfluenza Virus 1, Human / Q000187:drug effects*; D010936:Plant Extracts / Q000494:pharmacology*; D000254:Sodium-Potassium-Exchanging ATPase / Q000378:metabolism
chemical_list: D000998:Antiviral Agents; D010936:Plant Extracts; D000254:Sodium-Potassium-Exchanging ATPase; D000109:Acetylcholine