Comparable studies of immunostimulating activities in vitro among Mycobacterium bovis bacillus Calmette-Guérin (BCG) substrains.
During the serial passage of Mycobacterium bovis bacillus Calmette-Guérin (BCG) in different countries after initial seed distribution from the Pasteur Institute, specific insertions and deletions in the genome among BCG substrains were observed and speculated to result in differences in immunological activities. 'Early-shared strains' of BCG (Russia, Moreau, Japan, Sweden, Birkhaug), distributed by the Pasteur Institute, which conserve three types of mycolate (alpha, methoxy, keto) in cell wall, exhibited stronger activities of induction of nitric oxide, interleukin-1beta (IL-1beta), IL-6, IL-8, IL-12 and tumor necrosis factor (TNF)-alpha, from human epithelial cell line A549, human myelomonocytic cell line THP-1 and mouse bone marrow cells in the presence of interferon-gamma (IFN-gamma) than did 'late-shared strains' of BCG (Danish, Glaxo, Mexico, Tice, Connaught, Montreal, Phipps, Australia, Pasteur). The stronger induction of IL-12 and TNF-alpha in the presence of IFN-gamma was also observed by trehalose 6,6'-dimycolate (TDM) extracted from BCG-Japan than by TDM from BCG-Connaught, which lacks the methoxymycolate residue. These results suggest that 'early-shared strains' are more potent immunostimulating agents than 'late-shared strains', which could be attributed partially to methoxymycolate. Our study provides the basic information for immunological characterization of various BCG strains and may contribute to a re-evaluation of them as a reference strain for vaccination against tuberculosis.
Hayashi
Daisuke
D
Department of Molecular Health Sciences, Graduate School of Pharmaceutical Sciences, Nagoya City University, Nagoya, Japan.
Takii
Takemasa
T
Fujiwara
Nagatoshi
N
Fujita
Yukiko
Y
Yano
Ikuya
I
Yamamoto
Saburo
S
Kondo
Maki
M
Yasuda
Emi
E
Inagaki
Emi
E
Kanai
Keita
K
Fujiwara
Akiko
A
Kawarazaki
Aya
A
Chiba
Taku
T
Onozaki
Kikuo
K
D000818:Animals; D002460:Cell Line; D002478:Cells, Cultured; D003311:Cord Factors / Q000276:immunology / Q000302:isolation & purification; D004847:Epithelial Cells / Q000276:immunology* / Q000382:microbiology; D005260:Female; D006801:Humans; D007371:Interferon-gamma / Q000276:immunology; D007378:Interleukins / Q000378:metabolism*; D051379:Mice; D009000:Monocytes / Q000276:immunology* / Q000382:microbiology; D009163:Mycobacterium bovis / Q000276:immunology*; D009569:Nitric Oxide / Q000096:biosynthesis*; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*
D003311:Cord Factors; D007378:Interleukins; D014409:Tumor Necrosis Factor-alpha; D009569:Nitric Oxide; D007371:Interferon-gamma