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Maekawa T, Fukaya R, Takamatsu S, Itoyama S, Fukuoka T, Yamada M, Hata T, Nagaoka S, Kawamoto K, Eguchi H, Murata K, Kumada T, Ito T, Tanemura M, Fujimoto K, Tomita Y, Tobe T, Kamada Y, Miyoshi E. Possible involvement of Enterococcus infection in the pathogenesis of chronic pancreatitis and cancer. Biochem Biophys Res Commun 2018; 506:962-969. [PMID: 30401562 DOI: 10.1016/j.bbrc.2018.10.169] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 10/27/2018] [Indexed: 12/13/2022]
Abstract
(Aim) Bacterial infection underlies the pathogenesis of many human diseases, including acute and chronic inflammation. Here, we investigated a possible role for bacterial infection in the progression of chronic pancreatitis. (Materials and Methods) Pancreatic juice was obtained from patients with pancreatic cancer (n = 20) or duodenal cancer/bile duct cancer (n = 16) and subjected to PCR using universal primers for the bacterial 16S ribosomal RNA gene. Bacterial species were identified by PCR using bile samples from four pancreatic cancer patients. PCR products were subcloned into T-vectors, and the sequences were then analyzed. Immunohistochemical and serologic analyses for Enterococcus faecalis infection were performed on a large cohort of healthy volunteers and patients with chronic pancreatitis or pancreatic cancer and on mice with caerulein-induced chronic pancreatitis. The effect of E. faecalis antigens on cytokine secretion by pancreatic cancer cells was also investigated. (Results) We found that 29 of 36 pancreatic juice samples were positive for bacterial DNA. Enterococcus and Enterobacter species were detected primarily in bile, which is thought to be a pathway for bacterial infection of the pancreas. Enterococcus faecalis was also detected in pancreatic tissue from chronic pancreatitis and pancreatic cancer patients; antibodies to E. faecalis capsular polysaccharide were elevated in serum from chronic pancreatitis patients. Enterococcus-specific antibodies and pancreatic tissue-associated E. faecalis were detected in mice with caerulein-induced chronic pancreatitis. Addition of Enterococcus lipoteichoic acid and heat-killed bacteria induced expression of pro-fibrotic cytokines by pancreatic cancer cells in vitro. (Conclusion) Infection with E. faecalis may be involved in chronic pancreatitis progression, ultimately leading to development of pancreatic cancer.
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Affiliation(s)
- Tomohiro Maekawa
- Department of Molecular Biochemistry and Clinical Investigation, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Risako Fukaya
- Department of Molecular Biochemistry and Clinical Investigation, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Shinji Takamatsu
- Department of Molecular Biochemistry and Clinical Investigation, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Saki Itoyama
- Department of Molecular Biochemistry and Clinical Investigation, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Tomoya Fukuoka
- Department of Molecular Biochemistry and Clinical Investigation, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | | | - Tomoki Hata
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Satoshi Nagaoka
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Koichi Kawamoto
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Hidetoshi Eguchi
- Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Kohei Murata
- Department of Gastroenterological Surgery, Kansai-Rosai Hospital, Amagasaki, Hyogo, Japan
| | - Takashi Kumada
- Department of Gastroenterology, Ogaki Municipal Hospital, Ogaki, Gifu, Japan
| | - Toshifumi Ito
- Department of Gastroenterology and Hepatology, Japan Community Health Care Organization Osaka Hospital, Osaka, Osaka, Japan
| | - Masahiro Tanemura
- Department of Gastroenterological Surgery, Osaka Police Hospital, Osaka, Osaka, Japan
| | | | - Yasuhiko Tomita
- Department of Pathology, International University of Health and Welfare, Narita, Chiba, Japan
| | - Toru Tobe
- Department of Molecular Medical Microbiology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Yoshihiro Kamada
- Department of Molecular Biochemistry and Clinical Investigation, Osaka University Graduate School of Medicine, Suita, Osaka, Japan
| | - Eiji Miyoshi
- Department of Molecular Biochemistry and Clinical Investigation, Osaka University Graduate School of Medicine, Suita, Osaka, Japan.
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Fukaya R, Okimoto Y, Kunitomo M, Onda K, Ishikawa T, Koshihara S, Hashimoto H, Ishihara S, Isayama A, Yui H, Sasagawa T. Ultrafast electronic state conversion at room temperature utilizing hidden state in cuprate ladder system. Nat Commun 2015; 6:8519. [PMID: 26481604 PMCID: PMC4634131 DOI: 10.1038/ncomms9519] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 08/31/2015] [Indexed: 11/09/2022] Open
Abstract
Photo-control of material properties on femto- (10(-15)) and pico- (10(-12)) second timescales at room temperature has been a long-sought goal of materials science. Here we demonstrate a unique ultrafast conversion between the metallic and insulating state and the emergence of a hidden insulating state by tuning the carrier coherence in a wide temperature range in the two-leg ladder superconductor Sr(14-x)Ca(x)Cu24O41 through femtosecond time-resolved reflection spectroscopy. We also propose a theoretical scenario that can explain the experimental results. The calculations indicate that the holes injected by the ultrashort light reduce the coherence among the inherent hole pairs and result in suppression of conductivity, which is opposite to the conventional photocarrier-doping mechanism. By using trains of ultrashort laser pulses, we successively tune the carrier coherence to within 1 picosecond. Control of hole-pair coherence is shown to be a realistic strategy for tuning the electronic state on ultrafast timescales at room temperature.
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Affiliation(s)
- R Fukaya
- CREST, JST, Kawaguchi, Saitama 332-0012, Japan.,Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
| | - Y Okimoto
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
| | - M Kunitomo
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
| | - K Onda
- Interactive Research Center of Science, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8502, Japan.,PRESTO, JST, Kawaguchi, Saitama 332-0012, Japan
| | - T Ishikawa
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
| | - S Koshihara
- CREST, JST, Kawaguchi, Saitama 332-0012, Japan.,Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
| | - H Hashimoto
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - S Ishihara
- CREST, JST, Kawaguchi, Saitama 332-0012, Japan.,Department of Physics, Tohoku University, Sendai 980-8578, Japan
| | - A Isayama
- Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - H Yui
- Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
| | - T Sasagawa
- Materials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
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