Secretion of Cytokine Stimulating Intercellular Adhesion Molecule-l Expression from THP-l Cells Infected with Human Cytomegalovirus

HCMV에 감염된 TBP-1 세포에서 세포간 부착분자-1 발현 촉진물질의 방출

  • Kim, Mi-Suk (School of Life Sciences, Chungbuk National University) ;
  • Yi, Hyun-Ah (Biotechnology Research Institute, Chungbuk National University) ;
  • Lee, Chan-Hee (School of Life Sciences, Chungbuk National University)
  • 김미숙 (충북대학교 자연과학대학 생명과학부) ;
  • 이현아 (충북대학교 바이오연구소) ;
  • 이찬희 (충북대학교 자연과학대학 생명과학부)
  • Published : 2008.06.30


Human cytomegalovirus (HCMV) stimulates the expression of intercellular adhesion molecule (ICAM-l) on the surface of monocytic THP-1 cells. Stimulation of ICAM-l did not require HCMV gene expression since UV-inactivated HCMV (UV-HCMV) was able to induce ICAM-l expression. ICAM-l expression was also stimulated in uninfected THP-l cells which were fed with culture supernatant of HCMV-infected THP-l cells. Co-culture experiment using trans-well insert supported that HCMV-infected THP-l cells secreted some cytokine(s) stimulating ICAM-l expression. The stimulation of ICAM-l by HCMV-infected cell culture supernatant appears to involve $NF-{\kappa}B$ pathway. Culture supernatant from THP-l cells infected with UV-HCMV, whose gene expression was abrogated, failed to stimulate ICAM-l expression on naive THP-l cells. Thus, HCMV gene expression seems to be required in secretion of cytokine(s) stimulating ICAM-l expression.

다양한 염증 질환을 유발하는 사람세포거대바이러스(Human cytomegalovirus: HCMV)는 단핵구 세포주인 THP-1 세포에서 염증반응의 중요한 매개체인 세포간부착분자-1(intercellular adhesion molecule: ICAM-1) 발현을 촉진한다. ICAM-1 발현은 자외선으로 불활화시킨 HCMV (UV-HCMV)에 의해서도 촉진되므로 이 과정에 HCMV 유전자발현은 꼭 필요하지는 않은 것 같다. HCMV에 감염된 THP-1 세포 배양액을 감염되지 않은 THP-1 세포에 처리하거나 공유하게 하였을 시 감염되지 않은 세포에서도 ICAM-1 발현이 증가하였다. 감염된 세포 배양액에 의한 ICAM-1 발현 증가는 $NF-{\kappa}B$ 경로를 거친다. UV-HCMV에 감염된 세포의 배양액은 ICAM-1 발현을 촉진시키지 못하였다. 따라서 HCMV에 의한 THP-1 세포에서 ICAM-1 발현 증가는 바이러스 유전자 발현을 필요로 하지 않지만, 감염된 세포에서 ICAM-1 발현을 촉진하는 물질을 분비하는 과정에는 바이러스 유전자 발현이 필요한 것으로 생각된다.



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