Detection of human herpesvirus-8 in peripheral blood mononuclear cells from adult Japanese patients with multicentric Castleman's disease.
Human herpesvirus-8 (HHV-8) encodes viral homologues of cellular genes, including viral interleukin 6 (vIL-6), which induces endogenous human IL-6 (hIL-6) secretion. Unregulated overproduction of hIL-6 in lymph nodes (LN) is thought to be responsible for the systemic manifestations of multicentric Castleman's disease (MCD). In the present study, we assessed the presence of HHV-8 and HHV-8-encoded viral homologues in LN and peripheral blood mononuclear cells (PBMC) from adult Japanese patients with MCD. HHV-8 DNA was amplified by nested polymerase chain reaction (PCR) and was detected in LN from 13 out of 16 MCD patients (81%). HHV-8 DNA was also detected in PBMC from six out of seven patients (86%) whose LN were positive for HHV-8 DNA. Because mRNA could not be successfully extracted from LN sections that were either formalin-fixed or embedded in paraffin, we examined the expression of mRNA for HHV-8-encoded viral homologues, such as vIL-6, vBCL-2, vCyclin-D and viral G-protein-coupled receptor (vGPCR) by nested reverse transcription (RT)-PCR in PBMC from 10 MCD patients. However, mRNA of these HHV-8-encoded viral homologues was not detected in any patients tested. Although our results do not indicate a role for HHV-8-encoded viral homologues in the pathogenesis of MCD, they do suggest that HHV-8 infection may be associated with MCD in adult Japanese patients.
Yamasaki
Satoshi
S
Medicine and Biosystemic Science, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan. yamasaki@1nai.med.kyushu-u.ac.jp
Iino
Tadafumi
T
Nakamura
Minoru
M
Henzan
Hideho
H
Ohshima
Koichi
K
Kikuchi
Masahiro
M
Otsuka
Teruhisa
T
Harada
Mine
M
D000328:Adult; D000368:Aged; D005871:Castleman Disease / Q000821:virology*; D004279:DNA, Viral / Q000032:analysis; D005260:Female; D006566:Herpesviridae Infections / Q000150:complications*; D019288:Herpesvirus 8, Human / Q000302:isolation & purification*; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000821:virology*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction / Q000379:methods; D012333:RNA, Messenger / Q000235:genetics; D012367:RNA, Viral / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012689:Sequence Homology, Nucleic Acid
D004279:DNA, Viral; D012333:RNA, Messenger; D012367:RNA, Viral