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Ueda Y, Mogami H, Chigusa Y, Kawamura Y, Inohaya A, Takakura M, Yasuda E, Matsuzaka Y, Shimada M, Ito S, Morita S, Mandai M, Kondoh E. Hyposecretion of cervical MUC5B is related to preterm birth in pregnant women after cervical excisional surgery. Am J Reprod Immunol 2024; 91:e13832. [PMID: 38462543 DOI: 10.1111/aji.13832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 02/15/2024] [Accepted: 02/21/2024] [Indexed: 03/12/2024] Open
Abstract
PROBLEM Excisional surgery for cervical intraepithelial neoplasia is a risk factor for preterm birth in subsequent pregnancies. However, the underlying mechanisms of this association remain unclear. We previously showed that cervical MUC5B, a mucin protein, may be a barrier to ascending pathogens during pregnancy. We thus hypothesized that hyposecretion of cervical MUC5B is associated with preterm birth after cervical excisional surgery. METHOD OF STUDY This prospective nested case-control study (Study 1) included pregnant women who had previously undergone cervical excisional surgery across 11 hospitals. We used proteomics to compare cervicovaginal fluid at 18-22 weeks of gestation between the preterm and term birth groups. In another case-control analysis (Study 2), we compared MUC5B expression in nonpregnant uterine tissues between 15 women with a history of cervical excisional surgery and 26 women without a history of cervical surgery. RESULTS The abundance of MUC5B in cervicovaginal fluid was significantly decreased in the preterm birth group (fold change = 0.41, p = .035). Among the 480 quantified proteins, MUC5B had the second highest positive correlation with gestational age at delivery in the combined preterm and term groups. The cervicovaginal microbiome composition was not significantly different between the two groups. Cervical length was not correlated with gestational age at delivery (r = 0.18, p = .079). Histologically, the MUC5B-positive area in the nonpregnant cervix was significantly decreased in women with a history of cervical excisional surgery (0.85-fold, p = .048). The distribution of MUC5B-positive areas in the cervical tissues of 26 women without a history of cervical excisional surgery differed across individuals. CONCLUSIONS This study suggests that the primary mechanism by which cervical excisional surgery causes preterm birth is the hyposecretion of MUC5B due to loss of the cervical glands.
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Affiliation(s)
- Yusuke Ueda
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Haruta Mogami
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yoshitsugu Chigusa
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yosuke Kawamura
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Asako Inohaya
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Masahito Takakura
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Eriko Yasuda
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Yu Matsuzaka
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | | | - Shinji Ito
- Medical Research Support Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Satoshi Morita
- Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Masaki Mandai
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Eiji Kondoh
- Department of Gynecology and Obstetrics, Kyoto University Graduate School of Medicine, Kyoto, Japan
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Lee J, Kim H, Kang YW, Kim Y, Park MY, Song JH, Jo Y, Dao T, Ryu D, Lee J, Oh CM, Park S. LY6D is crucial for lipid accumulation and inflammation in nonalcoholic fatty liver disease. Exp Mol Med 2023:10.1038/s12276-023-01033-w. [PMID: 37394588 PMCID: PMC10394021 DOI: 10.1038/s12276-023-01033-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 02/07/2023] [Accepted: 04/17/2023] [Indexed: 07/04/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a serious metabolic disorder characterized by excess fat accumulation in the liver. Over the past decade, NAFLD prevalence and incidence have risen globally. There are currently no effective licensed drugs for its treatment. Thus, further study is required to identify new targets for NAFLD prevention and treatment. In this study, we fed C57BL6/J mice one of three diets, a standard chow diet, high-sucrose diet, or high-fat diet, and then characterized them. The mice fed a high-sucrose diet had more severely compacted macrovesicular and microvesicular lipid droplets than those in the other groups. Mouse liver transcriptome analysis identified lymphocyte antigen 6 family member D (Ly6d) as a key regulator of hepatic steatosis and the inflammatory response. Data from the Genotype-Tissue Expression project database showed that individuals with high liver Ly6d expression had more severe NAFLD histology than those with low liver Ly6d expression. In AML12 mouse hepatocytes, Ly6d overexpression increased lipid accumulation, while Ly6d knockdown decreased lipid accumulation. Inhibition of Ly6d ameliorated hepatic steatosis in a diet-induced NAFLD mouse model. Western blot analysis showed that Ly6d phosphorylated and activated ATP citrate lyase, which is a key enzyme in de novo lipogenesis. In addition, RNA- and ATAC-sequencing analyses revealed that Ly6d drives NAFLD progression by causing genetic and epigenetic changes. In conclusion, Ly6d is responsible for the regulation of lipid metabolism, and inhibiting Ly6d can prevent diet-induced steatosis in the liver. These findings highlight Ly6d as a novel therapeutic target for NAFLD.
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Affiliation(s)
- Jibeom Lee
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Hyeonhui Kim
- Graduate School of Medical Science, Brain Korea 21 Project, Yonsei University College of Medicine, Seoul, Korea
| | - Yun-Won Kang
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Yumin Kim
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Moon-Young Park
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Ji-Hong Song
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea
| | - Yunju Jo
- Department of Molecular Cell Biology, Sungkyunkwan University (SKKU) School of Medicine, Suwon, Korea
| | - Tam Dao
- Department of Molecular Cell Biology, Sungkyunkwan University (SKKU) School of Medicine, Suwon, Korea
| | - Dongryeol Ryu
- Department of Molecular Cell Biology, Sungkyunkwan University (SKKU) School of Medicine, Suwon, Korea
| | - Junguee Lee
- Department of Pathology, St Mary's Hospital, the Catholic University of Korea, Daejeon, Korea
| | - Chang-Myung Oh
- Department of Biomedical Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Korea.
| | - Sangkyu Park
- Department of Precision Medicine, Yonsei University Wonju College of Medicine, Wonju, Korea.
- Mitohormesis Research Center, Yonsei University Wonju College of Medicine, Wonju, Gangwon-do, Korea.
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3
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Salloum G, Bresnick AR, Backer JM. Macropinocytosis: mechanisms and regulation. Biochem J 2023; 480:335-362. [PMID: 36920093 DOI: 10.1042/bcj20210584] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 02/22/2023] [Accepted: 02/27/2023] [Indexed: 03/16/2023]
Abstract
Macropinocytosis is defined as an actin-dependent but coat- and dynamin-independent endocytic uptake process, which generates large intracellular vesicles (macropinosomes) containing a non-selective sampling of extracellular fluid. Macropinocytosis provides an important mechanism of immune surveillance by dendritic cells and macrophages, but also serves as an essential nutrient uptake pathway for unicellular organisms and tumor cells. This review examines the cell biological mechanisms that drive macropinocytosis, as well as the complex signaling pathways - GTPases, lipid and protein kinases and phosphatases, and actin regulatory proteins - that regulate macropinosome formation, internalization, and disposition.
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Affiliation(s)
- Gilbert Salloum
- Department of Molecular Pharamacology, Albert Einstein College of Medicine, Bronx, NY, U.S.A
| | - Anne R Bresnick
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY, U.S.A
| | - Jonathan M Backer
- Department of Molecular Pharamacology, Albert Einstein College of Medicine, Bronx, NY, U.S.A
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, NY, U.S.A
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Nakagawa K, Nagano T, Katasho R, Iwasaki T, Kamada S. Integrin β1 transduces the signal for LY6D-induced macropinocytosis and mediates senescence-inducing stress-evoked vacuole formation via FAK. FEBS Lett 2022; 596:2768-2780. [PMID: 35999651 DOI: 10.1002/1873-3468.14477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 07/12/2022] [Accepted: 07/18/2022] [Indexed: 11/07/2022]
Abstract
Cellular senescence is a highly stable cell cycle arrest induced by DNA damage and various cellular stresses. Recently, we have revealed that lymphocyte antigen 6 complex, locus D (LY6D) is responsible for senescence-inducing stress-evoked vacuole formation through induction of Src family kinase (SFK)-mediated macropinocytosis. However, the signaling molecule(s) transducing the macropinocytosis signal from extracellular LY6D to the cytoplasmic SFK are unknown. In this study, we identified integrin β1, a transmembrane signaling protein, as an interactor of LY6D by proteomic analysis and co-immunoprecipitation assays. Inhibition of integrin β1 impaired LY6D-induced macropinocytosis, and integrin β1 activated SFK through focal adhesion kinase to mediate macropinocytosis. These results indicate that integrin β1 is a crucial mediator of the LY6D-induced vacuole formation in senescent cells.
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Affiliation(s)
- Keitaro Nakagawa
- Department of Biology, Graduate School of Science, Kobe University, Japan
| | - Taiki Nagano
- Biosignal Research Center, Kobe University, Japan
| | - Ryoko Katasho
- Department of Biology, Graduate School of Science, Kobe University, Japan
| | - Tetsushi Iwasaki
- Department of Biology, Graduate School of Science, Kobe University, Japan
- Biosignal Research Center, Kobe University, Japan
| | - Shinji Kamada
- Department of Biology, Graduate School of Science, Kobe University, Japan
- Biosignal Research Center, Kobe University, Japan
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FOSL2 deficiency delays nonalcoholic steatohepatitis progression by regulating LY6D-mediated NLRP3 activation. Hum Cell 2022; 35:1752-1765. [PMID: 35930135 DOI: 10.1007/s13577-022-00760-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 07/24/2022] [Indexed: 12/27/2022]
Abstract
Lymphocyte antigen 6 family member D (LY6D) was enhanced specifically in senescent cells, while its effects on pyroptosis, a programmed cell death, remains unknown. The goal of this study was to assess the role of LY6D in the mediation of pyroptosis during nonalcoholic steatohepatitis (NASH). After screening out LY6D as a specific liver fibrosis-associated gene using the GSE55747 dataset from the GEO database, we established a NASH mouse model using methionine and choline deficient-diet feeding and an in vitro model using lipopolysaccharide (LPS)-treated hepatocytes. LY6D was overexpressed in NASH livers as well as in LPS-treated hepatocytes. Silencing of LY6D inhibited NASH-associated hepatocyte pyroptosis. With the aid of bioinformatics analysis, promoter-luciferase reporter and ChIP-qPCR assays, we identified FOSL2 as an upstream transcription factor of LY6D. FOSL2, which was highly expressed in NASH, promoted LY6D transcription by binding to the promoter of LY6D. Depletion of FOSL2 significantly inhibited NASH-associated hepatocyte pyroptosis, which was significantly reversed after overexpression of LY6D. Moreover, the promotion of hepatocyte pyroptosis by the FOSL2/LY6D axis was significantly attenuated by specific inhibition of NLRP3. These findings suggesting that FOSL2/LY6D axis may be a key molecular axis and a potential target for NASH therapeutics.
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Yoshikawa Y, Yuzu K, Yamamoto N, Morishima K, Inoue R, Sugiyama M, Iwasaki T, So M, Goto Y, Tamura A, Chatani E. Pathway Dependence of the Formation and Development of Prefibrillar Aggregates in Insulin B Chain. Molecules 2022; 27:molecules27133964. [PMID: 35807211 PMCID: PMC9268647 DOI: 10.3390/molecules27133964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/18/2022] [Accepted: 06/19/2022] [Indexed: 11/16/2022] Open
Abstract
Amyloid fibrils have been an important subject as they are involved in the development of many amyloidoses and neurodegenerative diseases. The formation of amyloid fibrils is typically initiated by nucleation, whereas its exact mechanisms are largely unknown. With this situation, we have previously identified prefibrillar aggregates in the formation of insulin B chain amyloid fibrils, which have provided an insight into the mechanisms of protein assembly involved in nucleation. Here, we have investigated the formation of insulin B chain amyloid fibrils under different pH conditions to better understand amyloid nucleation mediated by prefibrillar aggregates. The B chain showed strong propensity to form amyloid fibrils over a wide pH range, and prefibrillar aggregates were formed under all examined conditions. In particular, different structures of amyloid fibrils were found at pH 5.2 and pH 8.7, making it possible to compare different pathways. Detailed investigations at pH 5.2 in comparison with those at pH 8.7 have suggested that the evolution of protofibril-like aggregates is a common mechanism. In addition, different processes of evolution of the prefibrillar aggregates have also been identified, suggesting that the nucleation processes diversify depending on the polymorphism of amyloid fibrils.
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Affiliation(s)
- Yuki Yoshikawa
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan; (Y.Y.); (K.Y.); (T.I.); (A.T.)
| | - Keisuke Yuzu
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan; (Y.Y.); (K.Y.); (T.I.); (A.T.)
| | - Naoki Yamamoto
- Division of Biophysics, Physiology, School of Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke 329-0498, Tochigi, Japan;
| | - Ken Morishima
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori, Sennan-gun 590-0494, Osaka, Japan; (K.M.); (R.I.); (M.S.)
| | - Rintaro Inoue
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori, Sennan-gun 590-0494, Osaka, Japan; (K.M.); (R.I.); (M.S.)
| | - Masaaki Sugiyama
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, 2 Asashiro-Nishi, Kumatori, Sennan-gun 590-0494, Osaka, Japan; (K.M.); (R.I.); (M.S.)
| | - Tetsushi Iwasaki
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan; (Y.Y.); (K.Y.); (T.I.); (A.T.)
- Biosignal Research Center, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan
| | - Masatomo So
- Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita 565-0871, Osaka, Japan;
| | - Yuji Goto
- Global Center for Medical Engineering and Informatics, Osaka University, 2-1 Yamadaoka, Suita 565-0871, Osaka, Japan;
| | - Atsuo Tamura
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan; (Y.Y.); (K.Y.); (T.I.); (A.T.)
| | - Eri Chatani
- Graduate School of Science, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Hyogo, Japan; (Y.Y.); (K.Y.); (T.I.); (A.T.)
- Correspondence:
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