author_facet Suda, Takahiro
Tatsumi, Tomohide
Nishio, Akira
Kegasawa, Tadashi
Yoshioka, Teppei
Yamada, Ryoko
Furuta, Kunimaro
Kodama, Takahiro
Shigekawa, Minoru
Hikita, Hayato
Sakamori, Ryotaro
Fukuhara, Takasuke
Matsuura, Yoshiharu
Takehara, Tetsuo
Suda, Takahiro
Tatsumi, Tomohide
Nishio, Akira
Kegasawa, Tadashi
Yoshioka, Teppei
Yamada, Ryoko
Furuta, Kunimaro
Kodama, Takahiro
Shigekawa, Minoru
Hikita, Hayato
Sakamori, Ryotaro
Fukuhara, Takasuke
Matsuura, Yoshiharu
Takehara, Tetsuo
author Suda, Takahiro
Tatsumi, Tomohide
Nishio, Akira
Kegasawa, Tadashi
Yoshioka, Teppei
Yamada, Ryoko
Furuta, Kunimaro
Kodama, Takahiro
Shigekawa, Minoru
Hikita, Hayato
Sakamori, Ryotaro
Fukuhara, Takasuke
Matsuura, Yoshiharu
Takehara, Tetsuo
spellingShingle Suda, Takahiro
Tatsumi, Tomohide
Nishio, Akira
Kegasawa, Tadashi
Yoshioka, Teppei
Yamada, Ryoko
Furuta, Kunimaro
Kodama, Takahiro
Shigekawa, Minoru
Hikita, Hayato
Sakamori, Ryotaro
Fukuhara, Takasuke
Matsuura, Yoshiharu
Takehara, Tetsuo
Hepatology Communications
CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
Hepatology
author_sort suda, takahiro
spelling Suda, Takahiro Tatsumi, Tomohide Nishio, Akira Kegasawa, Tadashi Yoshioka, Teppei Yamada, Ryoko Furuta, Kunimaro Kodama, Takahiro Shigekawa, Minoru Hikita, Hayato Sakamori, Ryotaro Fukuhara, Takasuke Matsuura, Yoshiharu Takehara, Tetsuo 2471-254X 2471-254X Ovid Technologies (Wolters Kluwer Health) Hepatology http://dx.doi.org/10.1002/hep4.1240 <jats:p>Natural killer cells (NK cells) play an essential role in the immunological mechanism underlying chronic hepatitis C (CHC). Impairment of NK cell function facilitates persistent infection with hepatitis C virus (HCV) and hepatocellular carcinogenesis. However, the mechanism by which NK cell activity is suppressed in CHC is not completely understood. In this study, we focused on carcinoembryonic antigen–related cell‐adhesion molecule 1 (CEACAM1). CEACAM1 is thought to suppress NK cell function. We examined the effect of CEACAM1 on NK cell function in CHC. We investigated the function of CEACAM1 <jats:italic toggle="yes">in vitro</jats:italic> using Huh7.5.1 cells and the HCV‐Japanese fulminant hepatitis (JFH)‐1 strain. We analyzed serum CEACAM1 level, NK cell function, and CEACAM1 messenger RNA (mRNA) level in human liver samples. Levels of CEACAM1 on the cell surface, CEACAM1 mRNA levels, and soluble CEACAM1 levels in supernatants were significantly higher in Huh7.5.1 cells infected with JFH‐1 (Huh7.5.1/JFH‐1 cells) than in Huh7.5.1 cells. Significantly higher NK cell cytotoxicity was observed toward K562 cells after coculture with CEACAM1 knockout Huh7.5.1/JFH‐1 cells than after coculture with Huh7.5.1/JFH‐1 cells. CEACAM1 expression was induced by the HCV E2 glycoprotein in HCV infection. Significantly higher serum CEACAM1 levels were detected in patients with CHC compared with healthy subjects and patients who achieved sustained virological responses. The expression of CD107a on NK cells from patients with CHC was negatively correlated with serum CEACAM1 levels. Significantly higher levels of CEACAM1 mRNA were detected in HCV‐infected livers compared with uninfected livers. <jats:italic toggle="yes">Conclusion:</jats:italic> CEACAM1 expression was induced in hepatocytes following HCV infection and decreased NK cell cytotoxicity. These results demonstrate a possible role for CEACAM1 in the pathogenesis of CHC and hepatocellular carcinoma progression.</jats:p> CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C Hepatology Communications
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title CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_unstemmed CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_full CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_fullStr CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_full_unstemmed CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_short CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_sort ceacam1 is associated with the suppression of natural killer cell function in patients with chronic hepatitis c
topic Hepatology
url http://dx.doi.org/10.1002/hep4.1240
publishDate 2018
physical 1247-1258
description <jats:p>Natural killer cells (NK cells) play an essential role in the immunological mechanism underlying chronic hepatitis C (CHC). Impairment of NK cell function facilitates persistent infection with hepatitis C virus (HCV) and hepatocellular carcinogenesis. However, the mechanism by which NK cell activity is suppressed in CHC is not completely understood. In this study, we focused on carcinoembryonic antigen–related cell‐adhesion molecule 1 (CEACAM1). CEACAM1 is thought to suppress NK cell function. We examined the effect of CEACAM1 on NK cell function in CHC. We investigated the function of CEACAM1 <jats:italic toggle="yes">in vitro</jats:italic> using Huh7.5.1 cells and the HCV‐Japanese fulminant hepatitis (JFH)‐1 strain. We analyzed serum CEACAM1 level, NK cell function, and CEACAM1 messenger RNA (mRNA) level in human liver samples. Levels of CEACAM1 on the cell surface, CEACAM1 mRNA levels, and soluble CEACAM1 levels in supernatants were significantly higher in Huh7.5.1 cells infected with JFH‐1 (Huh7.5.1/JFH‐1 cells) than in Huh7.5.1 cells. Significantly higher NK cell cytotoxicity was observed toward K562 cells after coculture with CEACAM1 knockout Huh7.5.1/JFH‐1 cells than after coculture with Huh7.5.1/JFH‐1 cells. CEACAM1 expression was induced by the HCV E2 glycoprotein in HCV infection. Significantly higher serum CEACAM1 levels were detected in patients with CHC compared with healthy subjects and patients who achieved sustained virological responses. The expression of CD107a on NK cells from patients with CHC was negatively correlated with serum CEACAM1 levels. Significantly higher levels of CEACAM1 mRNA were detected in HCV‐infected livers compared with uninfected livers. <jats:italic toggle="yes">Conclusion:</jats:italic> CEACAM1 expression was induced in hepatocytes following HCV infection and decreased NK cell cytotoxicity. These results demonstrate a possible role for CEACAM1 in the pathogenesis of CHC and hepatocellular carcinoma progression.</jats:p>
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author Suda, Takahiro, Tatsumi, Tomohide, Nishio, Akira, Kegasawa, Tadashi, Yoshioka, Teppei, Yamada, Ryoko, Furuta, Kunimaro, Kodama, Takahiro, Shigekawa, Minoru, Hikita, Hayato, Sakamori, Ryotaro, Fukuhara, Takasuke, Matsuura, Yoshiharu, Takehara, Tetsuo
author_facet Suda, Takahiro, Tatsumi, Tomohide, Nishio, Akira, Kegasawa, Tadashi, Yoshioka, Teppei, Yamada, Ryoko, Furuta, Kunimaro, Kodama, Takahiro, Shigekawa, Minoru, Hikita, Hayato, Sakamori, Ryotaro, Fukuhara, Takasuke, Matsuura, Yoshiharu, Takehara, Tetsuo, Suda, Takahiro, Tatsumi, Tomohide, Nishio, Akira, Kegasawa, Tadashi, Yoshioka, Teppei, Yamada, Ryoko, Furuta, Kunimaro, Kodama, Takahiro, Shigekawa, Minoru, Hikita, Hayato, Sakamori, Ryotaro, Fukuhara, Takasuke, Matsuura, Yoshiharu, Takehara, Tetsuo
author_sort suda, takahiro
container_issue 10
container_start_page 1247
container_title Hepatology Communications
container_volume 2
description <jats:p>Natural killer cells (NK cells) play an essential role in the immunological mechanism underlying chronic hepatitis C (CHC). Impairment of NK cell function facilitates persistent infection with hepatitis C virus (HCV) and hepatocellular carcinogenesis. However, the mechanism by which NK cell activity is suppressed in CHC is not completely understood. In this study, we focused on carcinoembryonic antigen–related cell‐adhesion molecule 1 (CEACAM1). CEACAM1 is thought to suppress NK cell function. We examined the effect of CEACAM1 on NK cell function in CHC. We investigated the function of CEACAM1 <jats:italic toggle="yes">in vitro</jats:italic> using Huh7.5.1 cells and the HCV‐Japanese fulminant hepatitis (JFH)‐1 strain. We analyzed serum CEACAM1 level, NK cell function, and CEACAM1 messenger RNA (mRNA) level in human liver samples. Levels of CEACAM1 on the cell surface, CEACAM1 mRNA levels, and soluble CEACAM1 levels in supernatants were significantly higher in Huh7.5.1 cells infected with JFH‐1 (Huh7.5.1/JFH‐1 cells) than in Huh7.5.1 cells. Significantly higher NK cell cytotoxicity was observed toward K562 cells after coculture with CEACAM1 knockout Huh7.5.1/JFH‐1 cells than after coculture with Huh7.5.1/JFH‐1 cells. CEACAM1 expression was induced by the HCV E2 glycoprotein in HCV infection. Significantly higher serum CEACAM1 levels were detected in patients with CHC compared with healthy subjects and patients who achieved sustained virological responses. The expression of CD107a on NK cells from patients with CHC was negatively correlated with serum CEACAM1 levels. Significantly higher levels of CEACAM1 mRNA were detected in HCV‐infected livers compared with uninfected livers. <jats:italic toggle="yes">Conclusion:</jats:italic> CEACAM1 expression was induced in hepatocytes following HCV infection and decreased NK cell cytotoxicity. These results demonstrate a possible role for CEACAM1 in the pathogenesis of CHC and hepatocellular carcinoma progression.</jats:p>
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spelling Suda, Takahiro Tatsumi, Tomohide Nishio, Akira Kegasawa, Tadashi Yoshioka, Teppei Yamada, Ryoko Furuta, Kunimaro Kodama, Takahiro Shigekawa, Minoru Hikita, Hayato Sakamori, Ryotaro Fukuhara, Takasuke Matsuura, Yoshiharu Takehara, Tetsuo 2471-254X 2471-254X Ovid Technologies (Wolters Kluwer Health) Hepatology http://dx.doi.org/10.1002/hep4.1240 <jats:p>Natural killer cells (NK cells) play an essential role in the immunological mechanism underlying chronic hepatitis C (CHC). Impairment of NK cell function facilitates persistent infection with hepatitis C virus (HCV) and hepatocellular carcinogenesis. However, the mechanism by which NK cell activity is suppressed in CHC is not completely understood. In this study, we focused on carcinoembryonic antigen–related cell‐adhesion molecule 1 (CEACAM1). CEACAM1 is thought to suppress NK cell function. We examined the effect of CEACAM1 on NK cell function in CHC. We investigated the function of CEACAM1 <jats:italic toggle="yes">in vitro</jats:italic> using Huh7.5.1 cells and the HCV‐Japanese fulminant hepatitis (JFH)‐1 strain. We analyzed serum CEACAM1 level, NK cell function, and CEACAM1 messenger RNA (mRNA) level in human liver samples. Levels of CEACAM1 on the cell surface, CEACAM1 mRNA levels, and soluble CEACAM1 levels in supernatants were significantly higher in Huh7.5.1 cells infected with JFH‐1 (Huh7.5.1/JFH‐1 cells) than in Huh7.5.1 cells. Significantly higher NK cell cytotoxicity was observed toward K562 cells after coculture with CEACAM1 knockout Huh7.5.1/JFH‐1 cells than after coculture with Huh7.5.1/JFH‐1 cells. CEACAM1 expression was induced by the HCV E2 glycoprotein in HCV infection. Significantly higher serum CEACAM1 levels were detected in patients with CHC compared with healthy subjects and patients who achieved sustained virological responses. The expression of CD107a on NK cells from patients with CHC was negatively correlated with serum CEACAM1 levels. Significantly higher levels of CEACAM1 mRNA were detected in HCV‐infected livers compared with uninfected livers. <jats:italic toggle="yes">Conclusion:</jats:italic> CEACAM1 expression was induced in hepatocytes following HCV infection and decreased NK cell cytotoxicity. These results demonstrate a possible role for CEACAM1 in the pathogenesis of CHC and hepatocellular carcinoma progression.</jats:p> CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C Hepatology Communications
spellingShingle Suda, Takahiro, Tatsumi, Tomohide, Nishio, Akira, Kegasawa, Tadashi, Yoshioka, Teppei, Yamada, Ryoko, Furuta, Kunimaro, Kodama, Takahiro, Shigekawa, Minoru, Hikita, Hayato, Sakamori, Ryotaro, Fukuhara, Takasuke, Matsuura, Yoshiharu, Takehara, Tetsuo, Hepatology Communications, CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C, Hepatology
title CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_full CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_fullStr CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_full_unstemmed CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_short CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
title_sort ceacam1 is associated with the suppression of natural killer cell function in patients with chronic hepatitis c
title_unstemmed CEACAM1 Is Associated With the Suppression of Natural Killer Cell Function in Patients With Chronic Hepatitis C
topic Hepatology
url http://dx.doi.org/10.1002/hep4.1240