Volume 118, Issue 3 pp. 167-178

Detection of invasive protein profile of Streptococcus pyogenes M1 isolates from pharyngitis patients

TADAO HASEGAWA

TADAO HASEGAWA

Department of Bacteriology, Nagoya City University Graduate School of Medical Sciences, Nagoya

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AKIRA OKAMOTO

AKIRA OKAMOTO

Department of Molecular Bacteriology, Nagoya University Graduate School of Medicine, Nagoya

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TAKUYA KAMIMURA

TAKUYA KAMIMURA

Department of Molecular Bacteriology, Nagoya University Graduate School of Medicine, Nagoya

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ICHIRO TATSUNO

ICHIRO TATSUNO

Department of Bacteriology, Nagoya City University Graduate School of Medical Sciences, Nagoya

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SHIN-NOSUKE HASHIKAWA

SHIN-NOSUKE HASHIKAWA

Department of Molecular Bacteriology, Nagoya University Graduate School of Medicine, Nagoya

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MITSUTAKA YABUTANI

MITSUTAKA YABUTANI

Nagoya City Public Health Research Institute, Nagoya

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MASAKADO MATSUMOTO

MASAKADO MATSUMOTO

Aichi Prefectural Institute of Public Health, Nagoya, Japan

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KEIKO YAMADA

KEIKO YAMADA

Department of Molecular Bacteriology, Nagoya University Graduate School of Medicine, Nagoya

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MASANORI ISAKA

MASANORI ISAKA

Department of Bacteriology, Nagoya City University Graduate School of Medical Sciences, Nagoya

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MASAAKI MINAMI

MASAAKI MINAMI

Department of Bacteriology, Nagoya City University Graduate School of Medical Sciences, Nagoya

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MICHIO OHTA

MICHIO OHTA

Department of Molecular Bacteriology, Nagoya University Graduate School of Medicine, Nagoya

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First published: 01 February 2010
Citations: 23
Tadao Hasegawa, Department of Bacteriology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467 8601, Japan. e-mail: [email protected]

Abstract

Hasegawa T, Okamoto A, Kamimura T, Tatsuno I, Hashikawa S-N, Yabutani M, Matsumoto M, Yamada K, Isaka M, Minami M, Ohta M. Detection of invasive protein profile of Streptococcus pyogenes M1 isolates from pharyngitis patients. APMIS 2010; 118: 167–78.

Streptococcal toxic shock syndrome (STSS) is a re-emerging infectious disease in Japan and many other developed countries. Epidemiological studies have revealed that the M1 serotype of Streptococcus pyogenes is the most dominant causative isolate of STSS. Recent characterization of M1 isolates revealed that the mutation of covS, one of the two-component regulatory systems, plays an important role in STSS by altering protein expression. We analyzed the M1 S. pyogenes clinical isolates before or after 1990 in Japan, using two-dimensional gel electrophoresis (2-DE) and pulsed-field gel electrophoresis (PFGE). PFGE profiles were different between the isolates before and after 1990. Markedly different profiles among isolates after 1990 from STSS and pharyngitis patients were detected. Sequence analysis of two-component regulatory systems showed that covS mutations were detected not only in STSS but also in three pharyngitis isolates, in which proteins from the culture supernatant displayed the invasive type. The mutated CovS detected in the pharyngitis isolates had impaired function on the production of streptococcal pyrogenic exotoxin B (SpeB) analyzed by 2-DE. These results suggest that several covS mutations that lead to the malfunction of the CovS protein occurred even in pharyngeal infection.

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