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Yan Z, Zhong Z, Shi C, Feng M, Feng X, Liu T. The prognostic marker KRT81 is involved in suppressing CD8 + T cells and predicts immunotherapy response for triple-negative breast cancer. Cancer Biol Ther 2024; 25:2355705. [PMID: 38778753 PMCID: PMC11123506 DOI: 10.1080/15384047.2024.2355705] [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: 02/22/2024] [Accepted: 05/11/2024] [Indexed: 05/25/2024] Open
Abstract
Triple-negative breast Cancer (TNBC) is an aggressive subtype lacking estrogen, progesterone, and HER2 receptors. Known for limited targeted therapies, it poses challenges and requires personalized treatment strategies. Differential analysis revealed a significant decrease in keratin 81 (KRT81) expression in non-TNBC samples and an increase in TNBC samples, lower KRT81 expression correlated with better TNBC patient outcomes. It emerged as an independent predictive factor for TNBC, with associations found between its expression and clinically relevant features. We further developed a nomogram for survival probability assessment based on Cox regression results, demonstrating its accuracy through calibration curves. Gene annotation analysis indicated that KRT81 is involved in immune-related pathways and tumor cell adhesion. KRT81 is associated with immune cell infiltration of Follicular helper T cells (Tfh) and CD8 + T cells, suggesting its potential impact on the immunological microenvironment. The study delved into KRT81's predictive value for immunotherapy responses, high expression of KRT81 was associated with greater potential for immune evasion. Single-cell RNA sequencing analysis pinpointed KRT81 expression within a specific malignant subtype which was a risk factor for TNBC. Furthermore, KRT81 promoted TNBC cell proliferation, migration, invasion, and adhesion was confirmed by gene knockout or overexpression assay. Co-culture experiments further indicated KRT81's potential role in inhibiting CD8 + T cells, and correlation analysis implied KRT81 was highly correlated with immune checkpoint CD276, providing insights into its involvement in the immune microenvironment via CD276. In conclusion, this comprehensive study positions KRT81 as a promising prognostic marker for predicting tumor progression and immunotherapy responses in TNBC.
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Affiliation(s)
- Zhideng Yan
- Department of General Surgery, Zhongshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Zhongshan, Guangdong, China
| | - Zhihui Zhong
- Center of Stem Cell and Regenerative Medicine, Gaozhou People’s Hospital, Gaozhou, Guangdong, China
| | - Chuanke Shi
- Department of General Surgery, Zhongshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Zhongshan, Guangdong, China
| | - Muyin Feng
- Department of Pathology, Zhongshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Zhongshan, Guangdong, China
| | - Xiaoqiang Feng
- Center of Stem Cell and Regenerative Medicine, Gaozhou People’s Hospital, Gaozhou, Guangdong, China
| | - Tong Liu
- Department of General Surgery, Zhongshan Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Traditional Chinese Medicine, Zhongshan, Guangdong, China
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2
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Shiratsuchi G, Konishi S, Yano T, Yanagihashi Y, Nakayama S, Katsuno T, Kashihara H, Tanaka H, Tsukita K, Suzuki K, Herawati E, Watanabe H, Hirai T, Yagi T, Kondoh G, Gotoh S, Tamura A, Tsukita S. Dual-color live imaging unveils stepwise organization of multiple basal body arrays by cytoskeletons. EMBO Rep 2024; 25:1176-1207. [PMID: 38316902 PMCID: PMC10933483 DOI: 10.1038/s44319-024-00066-0] [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: 05/03/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 02/07/2024] Open
Abstract
For mucociliary clearance of pathogens, tracheal multiciliated epithelial cells (MCCs) organize coordinated beating of cilia, which originate from basal bodies (BBs) with basal feet (BFs) on one side. To clarify the self-organizing mechanism of coordinated intracellular BB-arrays composed of a well-ordered BB-alignment and unidirectional BB-orientation, determined by the direction of BB to BF, we generated double transgenic mice with GFP-centrin2-labeled BBs and mRuby3-Cep128-labeled BFs for long-term, high-resolution, dual-color live-cell imaging in primary-cultured tracheal MCCs. At early timepoints of MCC differentiation, BB-orientation and BB-local alignment antecedently coordinated in an apical microtubule-dependent manner. Later during MCC differentiation, fluctuations in BB-orientation were restricted, and locally aligned BB-arrays were further coordinated to align across the entire cell (BB-global alignment), mainly in an apical intermediate-sized filament-lattice-dependent manner. Thus, the high coordination of the BB-array was established for efficient mucociliary clearance as the primary defense against pathogen infection, identifying apical cytoskeletons as potential therapeutic targets.
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Affiliation(s)
- Gen Shiratsuchi
- Advanced Comprehensive Research Organization, Teikyo University, Tokyo, Japan
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
| | - Satoshi Konishi
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
- Department of Cell Biology, Duke University School of Medicine, Durham, NC, USA
| | - Tomoki Yano
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- Department of Organoid Medicine, Sakaguchi Laboratory, Keio University School of Medicine, Tokyo, Japan
| | | | - Shogo Nakayama
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- RIKEN Center for Biosystems Dynamics Research, Hyogo, Japan
| | - Tatsuya Katsuno
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- Center for Anatomical Studies, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Hiroka Kashihara
- Advanced Comprehensive Research Organization, Teikyo University, Tokyo, Japan
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
| | - Hiroo Tanaka
- Advanced Comprehensive Research Organization, Teikyo University, Tokyo, Japan
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- School of Medicine, Teikyo University, Tokyo, Japan
| | - Kazuto Tsukita
- Advanced Comprehensive Research Organization, Teikyo University, Tokyo, Japan
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- Department of Neurology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Koya Suzuki
- Advanced Comprehensive Research Organization, Teikyo University, Tokyo, Japan
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
| | - Elisa Herawati
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
- Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Surakarta, Central Java, Indonesia
| | - Hitomi Watanabe
- Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Toyohiro Hirai
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takeshi Yagi
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan
| | - Gen Kondoh
- Institute for Life and Medical Sciences, Kyoto University, Kyoto, Japan
| | - Shimpei Gotoh
- Department of Respiratory Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
- Center for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Atsushi Tamura
- Advanced Comprehensive Research Organization, Teikyo University, Tokyo, Japan.
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan.
- School of Medicine, Teikyo University, Tokyo, Japan.
| | - Sachiko Tsukita
- Advanced Comprehensive Research Organization, Teikyo University, Tokyo, Japan.
- Graduate School of Frontier Biosciences, Osaka University, Osaka, Japan.
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3
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Toivola DM, Polari L, Schwerd T, Schlegel N, Strnad P. The keratin-desmosome scaffold of internal epithelia in health and disease - The plot is thickening. Curr Opin Cell Biol 2024; 86:102282. [PMID: 38000362 DOI: 10.1016/j.ceb.2023.102282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 10/11/2023] [Accepted: 10/29/2023] [Indexed: 11/26/2023]
Abstract
Keratin (K) intermediate filaments are attached to desmosomes and constitute the orchestrators of epithelial cell and tissue architecture. While their relevance in the epidermis is well recognized, our review focuses on their emerging importance in internal epithelia. The significance of keratin-desmosome scaffolds (KDSs) in the intestine is highlighted by transgenic mouse models and individuals with inflammatory bowel disease who display profound KDS alterations. In lung, high K8 expression defines a transitional cell subset during regeneration, and K8 variants are associated with idiopathic pulmonary fibrosis. Inherited variants in desmosomal proteins are overrepresented in idiopathic lung fibrosis, and familiar eosinophilic esophagitis. K18 serum fragments are established hepatocellular injury markers that correlate with the extent of histological inflammation. K17 expression is modified in multiple tumors, and K17 levels might be of prognostic relevance. These data should spur further studies on biological roles of these versatile tissue protectors and efforts on their therapeutic targeting.
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Affiliation(s)
- Diana M Toivola
- Cell Biology, Biosciences and InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland.
| | - Lauri Polari
- Cell Biology, Biosciences and InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Tobias Schwerd
- Department of Pediatrics, Dr. von Hauner Children's Hospital, University Hospital, LMU Munich, 80337 Munich, Germany
| | - Nicolas Schlegel
- Department of General, Visceral, Transplant, Vascular and Pediatric Surgery, University Hospital Würzburg, Würzburg, Germany
| | - Pavel Strnad
- Department of Internal Medicine III, University Hospital, RWTH Aachen University, Aachen, Germany.
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4
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Ilomäki MA, Polari L, Stenvall CGA, Tayyab M, Kähärä K, Ridge KM, Toivola DM. Defining a timeline of colon pathologies after keratin 8 loss: rapid crypt elongation and diarrhea are followed by epithelial erosion and cell exfoliation. Am J Physiol Gastrointest Liver Physiol 2024; 326:G67-G77. [PMID: 37962942 DOI: 10.1152/ajpgi.00140.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/27/2023] [Accepted: 10/28/2023] [Indexed: 11/15/2023]
Abstract
Keratins are epithelial intermediate filament proteins that play a crucial role in cellular stress protection, with K8 being the most abundant in the colon. The intestinal epithelial-specific K8-deficient mouse model (K8flox/flox;Villin-Cre) exhibits characteristics of inflammatory bowel disease, including diarrhea, crypt erosion, hyperproliferation, and decreased barrier function. Nevertheless, the order in which these events occur and whether they are a direct cause of K8 loss or a consequence of one event inducing another remains unexplored. Increased knowledge about early events in the disruption of colon epithelial integrity would help to understand the early pathology of inflammatory and functional colon disorders and develop preclinical models and diagnostics of colonic diseases. Here, we aimed to characterize the order of physiological events after Krt8 loss by utilizing K8flox/flox;Villin-CreERt2 mice with tamoxifen-inducible Krt8 deletion in intestinal epithelial cells, and assess stool analysis as a noninvasive method to monitor real-time gene expression changes following Krt8 loss. K8 protein was significantly decreased within a day after induction, followed by its binding partners, K18 and K19 from day 4 onward. The sequential colonic K8 downregulation in adult mice leads to immediate diarrhea and crypt elongation with activation of proliferation signaling, followed by crypt loss and increased neutrophil activity within 6-8 days, highlighting impaired water balance and crypt elongation as the earliest colonic changes upon Krt8 loss. Furthermore, epithelial gene expression patterns were comparable between colon tissue and stool samples, demonstrating the feasibility of noninvasive monitoring of gut epithelia in preclinical research utilizing Cre-LoxP-based intestinal disease models.NEW & NOTEWORTHY Understanding the order in which physiological and molecular events occur helps to recognize the onset of diseases and improve their preclinical models. We utilized Cre-Lox-based inducible keratin 8 deletion in mouse intestinal epithelium to characterize the earliest events after keratin 8 loss leading to colitis. These include diarrhea and crypt elongation, followed by erosion and neutrophil activity. Our results also support noninvasive methodology for monitoring colon diseases in preclinical models.
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Affiliation(s)
- Maria A Ilomäki
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Lauri Polari
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Carl-Gustaf A Stenvall
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Mina Tayyab
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Kirah Kähärä
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Karen M Ridge
- Division of Pulmonary and Critical Care Medicine, Northwestern University, Chicago, Illinois, United States
| | - Diana M Toivola
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
- InFLAMES Research Flagship Center, Åbo Akademi University, Turku, Finland
- Turku Center for Disease Modeling, University of Turku, Turku, Finland
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5
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Martin‐Piedra MA, Carmona G, Campos F, Carriel V, Fernández‐González A, Campos A, Cuende N, Garzón I, Gacto P, Alaminos M. Histological assessment of nanostructured fibrin-agarose skin substitutes grafted in burnt patients. A time-course study. Bioeng Transl Med 2023; 8:e10572. [PMID: 38023713 PMCID: PMC10658487 DOI: 10.1002/btm2.10572] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 06/10/2023] [Accepted: 06/14/2023] [Indexed: 12/01/2023] Open
Abstract
A previously developed fibrin-agarose skin model-UGRSKIN-showed promising clinical results in severely burnt patients. To determine the histological parameters associated to the biocompatibility and therapeutic effects of this model, we carried out a comprehensive structural and ultrastructural study of UGRSKIN grafted in severely burnt patients after 3 months of follow-up. The grafted epidermis was analogue to native human skin from day 30th onward, revealing well-structured strata with well-differentiated keratinocytes expressing CK5, CK8, CK10, claudin, plakoglobin, filaggrin, and involucrin in a similar way to controls, suggesting that the epidermis was able to mature and differentiate very early. Melanocytes and Langerhans cells were found from day 30th onward, together with a basement membrane, abundant hemidesmosomes and lack of rete ridges. At the dermal layer, we found an interface between the grafted skin and the host tissue at day 30th, which tended to disappear with time. The grafted superficial dermis showed a progressive increase in properly-oriented collagen fibers, elastic fibers and proteoglycans, including decorin, similarly to control dermis at day 60-90th of in vivo follow-up. Blood vessels determined by CD31 and SMA expression were more abundant in grafted skin than controls, whereas lymphatic vessels were more abundant at day 90th. These results contribute to shed light on the histological parameters associated to biocompatibility and therapeutic effect of the UGRSKIN model grafted in patients and demonstrate that the bioengineered skin grafted in patients is able to mature and differentiate very early at the epithelial level and after 60-90 days at the dermal level.
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Affiliation(s)
- Miguel Angel Martin‐Piedra
- Tissue Engineering Group, Department of HistologyUniversity of GranadaSpain
- Instituto de Investigación Biosanitaria ibs.GRANADAGranadaSpain
| | - Gloria Carmona
- Andalusian Network for the Design and Translation of Advanced Therapies (former Andalusian Initiative for Advanced Therapies) ‐ Fundación Andaluza Progreso y Salud, Junta de Andalucía, Seville, Spain; Andalusian Transplant Coordination, Servicio Andaluz de SaludSevilleSpain
- Doctoral program in BiomedicineUniversity of GranadaGranadaSpain
| | - Fernando Campos
- Tissue Engineering Group, Department of HistologyUniversity of GranadaSpain
- Instituto de Investigación Biosanitaria ibs.GRANADAGranadaSpain
| | - Víctor Carriel
- Tissue Engineering Group, Department of HistologyUniversity of GranadaSpain
- Instituto de Investigación Biosanitaria ibs.GRANADAGranadaSpain
| | - Ana Fernández‐González
- Instituto de Investigación Biosanitaria ibs.GRANADAGranadaSpain
- Andalusian Network for the Design and Translation of Advanced Therapies (former Andalusian Initiative for Advanced Therapies) ‐ Fundación Andaluza Progreso y Salud, Junta de Andalucía, Seville, Spain; Andalusian Transplant Coordination, Servicio Andaluz de SaludSevilleSpain
- Unidad de Producción Celular e Ingeniería TisularHospital Universitario Virgen de las NievesGranadaSpain
| | - Antonio Campos
- Tissue Engineering Group, Department of HistologyUniversity of GranadaSpain
- Instituto de Investigación Biosanitaria ibs.GRANADAGranadaSpain
| | - Natividad Cuende
- Andalusian Network for the Design and Translation of Advanced Therapies (former Andalusian Initiative for Advanced Therapies) ‐ Fundación Andaluza Progreso y Salud, Junta de Andalucía, Seville, Spain; Andalusian Transplant Coordination, Servicio Andaluz de SaludSevilleSpain
| | - Ingrid Garzón
- Tissue Engineering Group, Department of HistologyUniversity of GranadaSpain
- Instituto de Investigación Biosanitaria ibs.GRANADAGranadaSpain
| | | | - Miguel Alaminos
- Tissue Engineering Group, Department of HistologyUniversity of GranadaSpain
- Instituto de Investigación Biosanitaria ibs.GRANADAGranadaSpain
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6
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Wang L, Wang B, Hu C, Wang C, Gao C, Jiang H, Yan Y. Influences of chronic copper exposure on intestinal histology, antioxidative and immune status, and transcriptomic response in freshwater grouper (Acrossocheilus fasciatus). FISH & SHELLFISH IMMUNOLOGY 2023; 139:108861. [PMID: 37257568 DOI: 10.1016/j.fsi.2023.108861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/15/2023] [Accepted: 05/29/2023] [Indexed: 06/02/2023]
Abstract
Copper (Cu) contamination is commonly found in both natural water environments and fish farms, and it can cause severe damage to different fish organs, but Cu-induced intestinal damage has been rarely studied. This study subjected three groups of freshwater grouper (Acrossocheilus fasciatus) (initial weight: 1.56 ± 0.10 g) to 0 mg/L, 0.01 mg/L, and 0.04 mg/L Cu2+ for 30 days, named Con, Cu0.01, and Cu0.04 groups, respectively. The histological observation indicated that the Cu0.04 group caused a significant decrease in villus length, lamina propria width, and muscular thickness compared to the Con group (P < 0.05). Additionally, the Cu0.04 group significantly increased intestinal superoxide dismutase (SOD), glutathione peroxidase (GPx), lysozyme (LZM) activities, as well as malondialdehyde (MDA) content than the Con group (P < 0.05). Meanwhile, the Cu0.01 and Cu0.04 groups showed significantly increased immunoglobulin M (IgM), complement 3 (C3), and glutathione (GSH) contents than the Con group (P < 0.05). Transcriptomic analysis revealed a total of 101 differentially expressed genes (DEGs), including 47 up-regulated and 54 down-regulated DEGs, were identified between the Cu0.04 and Con groups. Notably, the DEGs were mainly related to intestinal structure construction, immune functions, apoptosis, and resistance to DNA damage and pathogen infection. The findings suggest that chronic Cu exposure caused intestinal histological alterations, activated the antioxidative and immune systems, and induced systematic adaptation to cope with the physical barrier injury, DNA damage, and potential pathogen growth.
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Affiliation(s)
- Lei Wang
- School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China; Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, Wuhu, 241002, China; Provincial Key Laboratory of Biotic Environment and Ecological Safety in Anhui, Wuhu, 241002, China.
| | - Bin Wang
- School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China
| | - Cong Hu
- School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China
| | - Chenyang Wang
- School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China
| | - Chang Gao
- School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China
| | - He Jiang
- Fisheries Research Institution, Anhui Academy of Agricultural Sciences, Hefei, China.
| | - Yunzhi Yan
- School of Ecology and Environment, Anhui Normal University, Wuhu, 241002, China; Collaborative Innovation Center of Recovery and Reconstruction of Degraded Ecosystem in Wanjiang Basin Co-founded by Anhui Province and Ministry of Education, Anhui Normal University, Wuhu, 241002, China; Provincial Key Laboratory of Biotic Environment and Ecological Safety in Anhui, Wuhu, 241002, China.
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7
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Tenhami M, Polari L, Kujari H, Löyttyniemi E, Toivola DM, Voutilainen M. Keratin 7 expression in different anatomical parts of colonic epithelium in inflammatory bowel diseases and its prognostic value: a 3-year follow-up study. Sci Rep 2023; 13:11979. [PMID: 37488244 PMCID: PMC10366087 DOI: 10.1038/s41598-023-39066-w] [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: 05/04/2023] [Accepted: 07/19/2023] [Indexed: 07/26/2023] Open
Abstract
The diagnosis of inflammatory bowel diseases (IBD) may be challenging and their clinical course, characterized by relapses and spontaneous or drug-induced remissions, is difficult to predict. Novel prognostic biomarkers are needed. Keratin 7 (K7) is a cytoskeletal intermediate filament protein which is not normally expressed in the colonic epithelium. It was recently shown that K7 expression in the colonic epithelium is associated with ulcerative colitis and Crohn's disease, the two main subtypes of IBD. Here we investigated IBD associated K7 neo-expression in different regions of colon and terminal ileum. The correlation of the K7 expression with the inflammatory activity of the epithelium was analyzed in each region. The prognostic value of K7 was estimated by comparing the clinical disease activity after 3 years with the K7 expression at the time of enrollment. Our data shows that the level of K7 expression in inflamed epithelium varies depending on the anatomical region and it is the most pronounced in ascending and descending colon, but it did not predict the severity of IBD for the following 3 years. These results warrant future studies focusing on the biological role of K7 in colon and its utilization as potential IBD biomarker.
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Affiliation(s)
- Mervi Tenhami
- Division of Digestive Surgery, Turku University Hospital and University of Turku, P.O. Box 52, 20521, Turku, Finland.
| | - Lauri Polari
- Cell Biology, Biosciences, Åbo Akademi University, Turku, Finland
- InFlames Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Harry Kujari
- Department of Pathology, University of Turku and Turku University Hospital, Turku, Finland
| | - Eliisa Löyttyniemi
- Department of Biostatistics, University of Turku and Turku University Hospital, Turku, Finland
| | - Diana M Toivola
- Cell Biology, Biosciences, Åbo Akademi University, Turku, Finland
- InFlames Research Flagship Center, Åbo Akademi University, Turku, Finland
| | - Markku Voutilainen
- Department of Medicine, University of Turku and Turku University Hospital, Turku, Finland
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8
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Perrin L, Matic Vignjevic D. The emerging roles of the cytoskeleton in intestinal epithelium homeostasis. Semin Cell Dev Biol 2023:S1084-9521(23)00071-X. [PMID: 36948998 DOI: 10.1016/j.semcdb.2023.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 03/06/2023] [Accepted: 03/14/2023] [Indexed: 03/24/2023]
Abstract
The intestinal epithelium must absorb many nutrients and water while forming a barrier that is impermeable to pathogens present in the external environment. Concurrently to fulfill this dual role, the intestinal epithelium is challenged by a rapid renewal of cells and forces resulting from digestion. Hence, intestinal homeostasis requires precise control of tissue integrity, tissue renewal, cell polarity, and force generation/transmission. In this review, we highlight the contribution of the cell cytoskeleton- actin, microtubules, and intermediate filaments- to intestinal epithelium homeostasis. With a focus on enterocytes, we first discuss the role of these networks in the formation and maintenance of cell-cell and cell-matrix junctions. Then, we cover their role in intracellular trafficking related to the apicobasal polarity of enterocytes. Finally, we report on the cytoskeletal changes that occur during tissue renewal. In conclusion, the importance of the cytoskeleton in maintaining intestinal homeostasis is emerging, and we think this field will keep evolving.
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Affiliation(s)
- Louisiane Perrin
- Institut Curie, PSL Research University, CNRS UMR 144, F-75005 Paris, France.
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9
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A Kaleidoscope of Keratin Gene Expression and the Mosaic of Its Regulatory Mechanisms. Int J Mol Sci 2023; 24:ijms24065603. [PMID: 36982676 PMCID: PMC10052683 DOI: 10.3390/ijms24065603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/07/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023] Open
Abstract
Keratins are a family of intermediate filament-forming proteins highly specific to epithelial cells. A combination of expressed keratin genes is a defining property of the epithelium belonging to a certain type, organ/tissue, cell differentiation potential, and at normal or pathological conditions. In a variety of processes such as differentiation and maturation, as well as during acute or chronic injury and malignant transformation, keratin expression undergoes switching: an initial keratin profile changes accordingly to changed cell functions and location within a tissue as well as other parameters of cellular phenotype and physiology. Tight control of keratin expression implies the presence of complex regulatory landscapes within the keratin gene loci. Here, we highlight patterns of keratin expression in different biological conditions and summarize disparate data on mechanisms controlling keratin expression at the level of genomic regulatory elements, transcription factors (TFs), and chromatin spatial structure.
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10
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Wang K, Tao GZ, Salimi-Jazi F, Lin PY, Sun Z, Liu B, Sinclair T, Mostaghimi M, Dunn J, Sylvester KG. Butyrate induces development-dependent necrotizing enterocolitis-like intestinal epithelial injury via necroptosis. Pediatr Res 2023; 93:801-809. [PMID: 36202969 DOI: 10.1038/s41390-022-02333-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 09/12/2022] [Accepted: 09/18/2022] [Indexed: 03/05/2023]
Abstract
BACKGROUND The accumulation of short-chain fatty acids (SCFAs) from bacterial fermentation may adversely affect the under-developed gut as observed in premature newborns at risk for necrotizing enterocolitis (NEC). This study explores the mechanism by which specific SCFA fermentation products may injure the premature newborn intestine mucosa leading to NEC-like intestinal cell injury. METHODS Intraluminal injections of sodium butyrate were administered to 14- and 28-day-old mice, whose small intestine and stool were harvested for analysis. Human intestinal epithelial stem cells (hIESCs) and differentiated enterocytes from preterm and term infants were treated with sodium butyrate at varying concentrations. Necrosulfonamide (NSA) and necrostatin-1 (Nec-1) were used to determine the protective effects of necroptosis inhibitors on butyrate-induced cell injury. RESULTS The more severe intestinal epithelial injury was observed in younger mice upon exposure to butyrate (p = 0.02). Enterocytes from preterm newborns demonstrated a significant increase in sensitivity to butyrate-induced cell injury compared to term newborn enterocytes (p = 0.068, hIESCs; p = 0.038, differentiated cells). NSA and Nec-1 significantly inhibited the cell death induced by butyrate. CONCLUSIONS Butyrate induces developmental stage-dependent intestinal injury that resembles NEC. A primary mechanism of cell injury in NEC is necroptosis. Necroptosis inhibition may represent a potential preventive or therapeutic strategy for NEC. IMPACT Butyrate induces developmental stage-dependent intestinal injury that resembles NEC. A primary mechanism of cell injury caused by butyrate in NEC is necroptosis. Necroptosis inhibitors proved effective at significantly ameliorating the enteral toxicity of butyrate and thereby suggest a novel mechanism and approach to the prevention and treatment of NEC in premature newborns.
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Affiliation(s)
- Kewei Wang
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
- Department of Gastrointestinal Surgery, The First Hospital of China Medical University, 110001, Shenyang, Liaoning Province, China
| | - Guo-Zhong Tao
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA.
| | | | - Po-Yu Lin
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Zhen Sun
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Bo Liu
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Tiffany Sinclair
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Mirko Mostaghimi
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - James Dunn
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA
| | - Karl G Sylvester
- Department of Surgery, Stanford University School of Medicine, Stanford, CA, USA.
- Stanford Metabolic Health Center, Stanford University School of Medicine and Stanford Healthcare, Stanford, CA, USA.
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11
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Nguyen TX, Agazzi A, McGill S, Weidt S, Han QH, Gelemanović A, McLaughlin M, Savoini G, Eckersall PD, Burchmore R. Proteomic changes associated with maternal dietary low ω6:ω3 ratio in piglets supplemented with seaweed Part II: Ileum proteomes. J Proteomics 2023; 270:104739. [PMID: 36174954 DOI: 10.1016/j.jprot.2022.104739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 09/14/2022] [Accepted: 09/16/2022] [Indexed: 02/01/2023]
Abstract
This study evaluates how long-term dietary low ω6:ω3 ratio in sows and offspring's seaweed (SW) intake affects piglet intestinal function and growth through modifying ileum proteome. Sows were assigned to either control diet (CR, ω6:ω3 ratio = 13:1) or treatment diet (LR, ω6:ω3 = 4:1) during gestation and lactation (n = 8 each). The male weaned offspring were received a basal diet with or without SW powder supplementation (4 g/kg) for 21 days, denoted as SW and CT groups, respectively. In total, four groups of weaned piglets were formed following maternal and offspring's diets combination, represented by CRCT, CRSW, LRCT, and LRSW (n = 10 each). Piglet ileum tissue was collected on day 22 post-weaning and analysed using TMT-based quantitative proteomics. The differentially abundant proteins (n = 300) showed the influence of maternal LR diet on protein synthesis, cell proliferation, and cell cycle regulation. In contrast, the SW diet lowered the inflammation severity and promoted ileal tissue development in CRSW piglets but reduced the fat absorption capacity in LRSW piglets. These results uncovered the mechanism behind the anti-inflammation and intestinal-boosting effects of maternal LR diet in piglets supplemented with SW.
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Affiliation(s)
- Thi Xuan Nguyen
- Università degli Studi di Milano, Via dell'Università, 6, 26900 Lodi, Italy; University of Glasgow, Bearsden Rd, G61 1QH, United Kingdom; Vietnam National University of Agriculture, Hanoi, Viet Nam.
| | - Alessandro Agazzi
- Università degli Studi di Milano, Via dell'Università, 6, 26900 Lodi, Italy
| | - Suzanne McGill
- University of Glasgow, Bearsden Rd, G61 1QH, United Kingdom
| | - Stefan Weidt
- University of Glasgow, Bearsden Rd, G61 1QH, United Kingdom
| | - Quang Hanh Han
- University of Glasgow, Bearsden Rd, G61 1QH, United Kingdom; Vietnam National University of Agriculture, Hanoi, Viet Nam
| | - Andrea Gelemanović
- Mediterranean Institute for Life Sciences (MedILS), Meštrovićevo šetalište 45, 21000 Split, Croatia
| | | | - Giovanni Savoini
- Università degli Studi di Milano, Via dell'Università, 6, 26900 Lodi, Italy
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12
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Colonocyte keratin 7 is expressed de novo in inflammatory bowel diseases and associated with pathological changes and drug-resistance. Sci Rep 2022; 12:22213. [PMID: 36564440 PMCID: PMC9789078 DOI: 10.1038/s41598-022-26603-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
The clinical course of IBD, characterized by relapses and remissions, is difficult to predict. Initial diagnosis can be challenging, and novel disease markers are needed. Keratin 7 (K7) is a cytoskeletal intermediate filament protein not expressed in the colonic epithelium but has been reported in IBD-associated colorectal tumors. Our aim was to analyze whether K7 is expressed in chronic colonic inflammatory diseases and evaluate its potential as a novel biomarker. K7 was analyzed in two patient cohorts using immunohistochemistry-stained colon samples and single-cell quantitative digital pathology methods. K7 was correlated to pathological changes and clinical patient characteristics. Our data shows that K7 is expressed de novo in the colonic epithelium of ulcerative colitis and Crohn's disease IBD patients, but not in collagenous or lymphocytic colitis. K7 mRNA expression was significantly increased in colons of IBD patients compared to controls when assessed in publicly available datasets. While K7 increased in areas with inflammatory activity, it was not expressed in specific crypt compartments and did not correlate with neutrophils or stool calprotectin. K7 was increased in areas proximal to pathological alterations and was most pronounced in drug-resistant ulcerative colitis. In conclusion, colonic epithelial K7 is neo-expressed selectively in IBD patients and could be investigated for its potential as a disease biomarker.
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13
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Marín-Tello C, Jintaridth P, Sanchez F, González C, Zelada-Castillo L, Vásquez-Arqueros A, Guevara-Vásquez A, Vieira A. Epigenetic regulation by metabolites from the gut microbiome. Benef Microbes 2022; 13:437-444. [PMID: 36377583 DOI: 10.3920/bm2022.0006] [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] [Indexed: 11/16/2022]
Abstract
The gut microbiome can metabolise food components, such as dietary fibres and various phytochemicals; and the microbiome can also synthesise some nutrients, for example B vitamins. The metabolites produced by bacteria and other micro-organisms in the colon can have implications for health and disease risk. Some of these metabolites are epigenetically active, and can contribute to changes in the chemical modification and structure of chromatin by affecting the activity and expression of epigenetically-active enzymes, for example histone deacetylases and DNA methyltransferases. The epigenetic activity of such gut microbiome metabolites is reviewed herein.
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Affiliation(s)
- C Marín-Tello
- Food, Metabolism, and Physiology Laboratory, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13008, Perú
| | - P Jintaridth
- Department of Tropical Nutrition and Food Science, The Faculty of Tropical Medicine, Mahidol University, 420/6 Rachavithi Road, Rachathevi, Payatai, Bangkok 10400, Thailand
| | - F Sanchez
- Instituto De Educacion Superior Tecnológico Público, 103, Lonya Grande 01556, Perú
| | - C González
- CITE Agroindustrial Chavimochic, Virú 044, Perú
| | - L Zelada-Castillo
- Food, Metabolism, and Physiology Laboratory, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13008, Perú
| | - A Vásquez-Arqueros
- Food, Metabolism, and Physiology Laboratory, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13008, Perú
| | - A Guevara-Vásquez
- Food, Metabolism, and Physiology Laboratory, Facultad de Farmacia y Bioquímica, Universidad Nacional de Trujillo, Trujillo 13008, Perú
| | - A Vieira
- Nutrition and Metabolism Research Laboratory, BPK-9625, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, V5A 1S6, Canada
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14
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Stenvall CGA, Nyström JH, Butler-Hallissey C, Jansson T, Heikkilä TRH, Adam SA, Foisner R, Goldman RD, Ridge KM, Toivola DM. Cytoplasmic keratins couple with and maintain nuclear envelope integrity in colonic epithelial cells. Mol Biol Cell 2022; 33:ar121. [PMID: 36001365 PMCID: PMC9634972 DOI: 10.1091/mbc.e20-06-0387] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Keratin intermediate filaments convey mechanical stability and protection against stress to epithelial cells. Keratins are essential for colon health, as seen in keratin 8 knockout (K8-/-) mice exhibiting a colitis phenotype. We hypothesized that keratins support the nuclear envelope and lamina in colonocytes. K8-/- colonocytes in vivo exhibit significantly decreased levels of lamins A/C, B1, and B2 in a colon-specific and cell-intrinsic manner. CRISPR/Cas9- or siRNA-mediated K8 knockdown in Caco-2 cells similarly decreased lamin levels, which recovered after reexpression of K8 following siRNA treatment. Nuclear area was not decreased, and roundness was only marginally increased in cells without K8. Down-regulation of K8 in adult K8flox/flox;Villin-CreERt2 mice following tamoxifen administration significantly decreased lamin levels at day 4 when K8 levels had reduced to 40%. K8 loss also led to reduced levels of plectin, LINC complex, and lamin-associated proteins. While keratins were not seen in the nucleoplasm without or with leptomycin B treatment, keratins were found intimately located at the nuclear envelope and complexed with SUN2 and lamin A. Furthermore, K8 loss in Caco-2 cells compromised nuclear membrane integrity basally and after shear stress. In conclusion, colonocyte K8 helps maintain nuclear envelope and lamina composition and contributes to nuclear integrity.
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Affiliation(s)
| | - Joel H. Nyström
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University
| | - Ciarán Butler-Hallissey
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University,Turku Bioscience Centre, University of Turku, and Åbo Akademi University, and,Aix Marseille Université, CNRS, INP UMR7051, NeuroCyto, 13005 Marseille, France
| | - Theresia Jansson
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University
| | - Taina R. H. Heikkilä
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University
| | | | - Roland Foisner
- Max Perutz Labs, Medical University of Vienna, Vienna Biocenter Campus, 1030 Vienna, Austria
| | | | - Karen M. Ridge
- Department of Cell and Developmental Biology and,Pulmonary and Critical Care Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Diana M. Toivola
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University,InFLAMES Research Flagship Center, Åbo Akademi University, 20500 Turku, Finland,Turku Center for Disease Modeling, University of Turku, 20520 Turku, Finland,*Address correspondence to: Diana M. Toivola ()
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15
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Wu J, Zhu Z, Liu W, Zhang Y, Kang Y, Liu J, Hu C, Wang R, Zhang M, Chen L, Shao L. How Nanoparticles Open the Paracellular Route of Biological Barriers: Mechanisms, Applications, and Prospects. ACS NANO 2022; 16:15627-15652. [PMID: 36121682 DOI: 10.1021/acsnano.2c05317] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Biological barriers are essential physiological protective systems and obstacles to drug delivery. Nanoparticles (NPs) can access the paracellular route of biological barriers, either causing adverse health impacts on humans or producing therapeutic opportunities. This Review introduces the structural and functional influences of NPs on the key components that govern the paracellular route, mainly tight junctions, adherens junctions, and cytoskeletons. Furthermore, we evaluate their interaction mechanisms and address the influencing factors that determine the ability of NPs to open the paracellular route, which provides a better knowledge of how NPs can open the paracellular route in a safer and more controllable way. Finally, we summarize limitations in the research models and methodologies of the existing research in the field and provide future research direction. This Review demonstrates the in-depth causes for the reversible opening or destruction of the integrity of barriers generated by NPs; more importantly, it contributes insights into the design of NP-based medications to boost paracellular drug delivery efficiency.
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Affiliation(s)
- Junrong Wu
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou 510515, China
| | - Zhenjun Zhu
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Wenjing Liu
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Yanli Zhang
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Yiyuan Kang
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Jia Liu
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Chen Hu
- Nanfang Hospital, Southern Medical University, Guangzhou 510515, China
| | - Ruolan Wang
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Manjin Zhang
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
| | - Lili Chen
- Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- School of Stomatology, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
- Hubei Province Key Laboratory of Oral and Maxillofacial Development and Regeneration, Wuhan 430022, China
| | - Longquan Shao
- Stomatological Hospital, Southern Medical University, Guangzhou 510280, China
- Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou 510515, China
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16
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Scattered Tubular Cells Markers in Macula Densa of Normal Human Adult Kidney. Int J Mol Sci 2022; 23:ijms231810504. [PMID: 36142420 PMCID: PMC9500602 DOI: 10.3390/ijms231810504] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 08/29/2022] [Accepted: 09/08/2022] [Indexed: 11/28/2022] Open
Abstract
Background: The scattered tubular cells (STCs) are a population of resident progenitor tubular cells with expansion, self-renewal and epithelial differentiation abilities. Although these cells are localized within the proximal (PTs) and distal (DTs) tubules in a normal adult kidney, their presence has never been demonstrated in human macula densa (MD). The purpose of the present study is to describe the presence of STCs in MD using specific markers such as prominin-1 (CD133), cytokeratin 7 (KRT7) and vimentin (VIM). Methods: We analyzed two sets of three consecutive serial sections for each sample. The first sections of each set were immunostained for nNOS to identify MD, the second sections were immune-stained for CD133 (specific STCs marker) while the third sections were analyzed for KRT7 (another STCs specific marker) and VIM (that stains the basal pole of the STCs) in the first and second sets, respectively, in order to study the co-expression of KRT7 and VIM with the CD133 marker. Results: CD133 was localized in some MD cells and in the adjacent DT cells. Moreover, CD133 was detected in the parietal epithelial cells of Bowman’s capsule and in some proximal tubules (PT). KRT7-positive cells were identified in MD and adjacent DT cells, while KRT7 positivity was mostly confined in both DT and collecting ducts (CD) in the other areas of the renal parenchyma. CD133 and KRT7 were co-expressed in some MD and adjacent DT cells. Some of the latter cells were positive both for CD133 and VIM. CD133 was always localized in the apical part of the cells, whereas the VIM expression was evident only in the cellular basal pole. Although some cells of MD expressed VIM or CD133, none of them co-expressed VIM and CD133. Conclusions: The presence of STCs was demonstrated in human adult MD, suggesting that this structure has expansion, self-renewal and epithelial differentiation abilities, similar to all other parts of renal tubules.
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17
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SOX9 in Keratinocytes Regulates Claudin 2 Transcription during Skin Aging. CONTRAST MEDIA & MOLECULAR IMAGING 2022; 2022:6884308. [PMID: 35965621 PMCID: PMC9357741 DOI: 10.1155/2022/6884308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/13/2022] [Accepted: 06/26/2022] [Indexed: 11/17/2022]
Abstract
In order to prove that SOX9 in keratinocytes regulates claudin 2 transcription during skin aging, the skin of 8-week-old and 24-month-old mice is sequenced to obtain a differentially expressed gene SOX9. The gene is mainly expressed in keratinocytes, and it increases first and then decreases from newborn to aging. Six core sequences of SOX9 and claudin 2 are predicted from Jaspar. The double Luciferase Report shows that overexpression of SOX9 induces the full-length promoter of claudin 2 significantly and has no effect on the mutation and cleavage plasmid without SOX9 response. Claudin 2 is consistent with SOX9 in the skin of mice of different ages, and SOX9 is strongly positively correlated with claudin 2. Finally, overexpression of SOX9 and claudin 2 will delay PM2.5-induced keratinocyte senescence. The silencing of claudin 2 leads to the loss of SOX9 function. It is clearly evident that SOX9 can affect the transcription of claudin 2, which increases first and then decreases in the process of mice from newborn to aging. SOX9 inhibits proinflammatory mediators, increases antioxidant capacity, and restores keratin differentiation. It can effectively prevent melanin deposition and delay aging.
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18
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Roles of Keratins in Intestine. Int J Mol Sci 2022; 23:ijms23148051. [PMID: 35887395 PMCID: PMC9317181 DOI: 10.3390/ijms23148051] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/19/2022] [Accepted: 07/19/2022] [Indexed: 12/02/2022] Open
Abstract
Keratins make up a major portion of epithelial intermediate filament proteins. The widely diverse keratins are found in both the small and large intestines. The human intestine mainly expresses keratins 8, 18, 19, and 20. Many of the common roles of keratins are for the integrity and stability of the epithelial cells. The keratins also protect the cells and tissue from stress and are biomarkers for some diseases in the organs. Although an increasing number of studies have been performed regarding keratins, the roles of keratin in the intestine have not yet been fully understood. This review focuses on discussing the roles of keratins in the intestine. Diverse studies utilizing mouse models and samples from patients with intestinal diseases in the search for the association of keratin in intestinal diseases have been summarized.
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19
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Dietary Inclusion of Dried Chicory Root Affects Cecal Mucosa Proteome of Nursery Pigs. Animals (Basel) 2022; 12:ani12131710. [PMID: 35804609 PMCID: PMC9264899 DOI: 10.3390/ani12131710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/24/2022] [Accepted: 06/29/2022] [Indexed: 12/02/2022] Open
Abstract
Simple Summary A well-balanced diet seems to play a key role in disease prevention and health promotion in young animals. Therefore, many attempts have been made to supplement feeds with novel nutritional components, with potential prebiotic capacity. It seems that chicory root fulfils those criteria as it contains high amounts of inulin-type fructans. Hence, the aim of the study was to determine the effect of dietary supplementation with 4% dried chicory root on the cecal mucosa proteome of piglets. It is shown that this feed additive may affect cellular metabolism in the cecal epithelium and may be beneficial for gut health. Abstract Prebiotics are known to have many beneficial effects on intestinal health by modulating the gut microbiota composition, thereby affecting epithelial cell proliferation and metabolism. This study had two aims: (1) to identify the protein constituents in the cecal mucosa of 50-day-old healthy (PIC × Penarlan P76) barrows, and (2) to assess the effects of 4% inclusion of dried chicory root in a cereal-based diet on the cecal mucosa proteome changes. Pigs (eight per group) were randomly allotted to the groups and were fed a control diet from the tenth day of life (C) or a diet supplemented with 4% of died chicory root (CR), for 40 days. At the age of 50 days, animals were sacrificed and cecal tissue samples were collected. It was found that feeding a CR diet significantly decreased the expression of 16 cecal mucosa proteins. Among them, fifteen proteins were down-regulated, while only one (KRT20) was shown to be up-regulated when compared to the C group. Dietary supplementation with CR caused down-expression of metabolism-associated proteins including enzymes involved in the process of glycolysis (G6PD, TPI1, ALDH9A1, CKMT1 and AKR1A1) as well as those engaged in transcriptional and translational activity (PRPF19, EEF1G) and several structural proteins (ACTR3, KRT77, CAP1 and actin). From our findings, it is possible to conclude that dietary chicory root at 4% had beneficial effects on the gut health of pigs as indicated by a changed abundance of certain cecal proteins such as KRT20, SERPINB1, HSP27, ANAXA2 and ANAXA4.
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20
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Elmentaite R, Domínguez Conde C, Yang L, Teichmann SA. Single-cell atlases: shared and tissue-specific cell types across human organs. Nat Rev Genet 2022; 23:395-410. [PMID: 35217821 DOI: 10.1038/s41576-022-00449-w] [Citation(s) in RCA: 48] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2022] [Indexed: 12/12/2022]
Abstract
The development of single-cell and spatial transcriptomics methods was instrumental in the conception of the Human Cell Atlas initiative, which aims to generate an integrated map of all cells across the human body. These technology advances are bringing increasing depth and resolution to maps of human organs and tissues, as well as our understanding of individual human cell types. Commonalities as well as tissue-specific features of primary and supportive cell types across human organs are beginning to emerge from these human tissue maps. In this Review, we highlight key biological insights obtained from cross-tissue studies into epithelial, fibroblast, vascular and immune cells based on single-cell gene expression data in humans and contrast it with mechanisms reported in mice.
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Affiliation(s)
- Rasa Elmentaite
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
| | | | - Lu Yang
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
| | - Sarah A Teichmann
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK.
- Theory of Condensed Matter, Cavendish Laboratory, Department of Physics, University of Cambridge, Cambridge, UK.
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21
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Amara AAAF. Natural Polymer Types and Applications. BIOMOLECULES FROM NATURAL SOURCES 2022:31-81. [DOI: 10.1002/9781119769620.ch2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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22
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Yan RR, Gong JS, Su C, Liu YL, Qian JY, Xu ZH, Shi JS. Preparation and applications of keratin biomaterials from natural keratin wastes. Appl Microbiol Biotechnol 2022; 106:2349-2366. [DOI: 10.1007/s00253-022-11882-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 03/08/2022] [Accepted: 03/12/2022] [Indexed: 12/20/2022]
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Shang Q, Yang Y, Li H. LINC01605 knockdown induces apoptosis in human Tenon's capsule fibroblasts by inhibiting autophagy. Exp Ther Med 2022; 23:343. [PMID: 35401799 PMCID: PMC8988162 DOI: 10.3892/etm.2022.11273] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 01/25/2022] [Indexed: 11/06/2022] Open
Abstract
Glaucoma is an irreversible disease that causes blindness. Formation of a hypertrophic scar (HS) is the main cause of failure of glaucoma surgery. The long non-coding RNA LINC01605 is closely associated with the formation of HS; however, the function of LINC01605 in the formation and development of HS remains unclear. For this study, firstly, human Tenon's capsule fibroblasts (HTFs) and corneal epithelial cells (control cells) were collected from patients (n=5) with POAG who underwent glaucoma filtration surgery at Fuyang People's Hospital. Immunofluorescence analysis was performed to detect the expression levels of vimentin (one of the main components of medium fiber and plays an important role in the cytoskeleton and motility), keratin (the main component of cytoskeletal proteins) and LC3 (an autophagy marker). In addition, reverse transcription-quantitative PCR analysis was performed to detect LINC01605 expression. Besides, the Cell Counting Kit-8 assay was performed to assess the viability of human Tenon's capsule fibroblasts (HTFs). Next, flow cytometry was performed to detect HTF apoptosis. Furthermore, western blot analysis was performed for Bax, Bcl-2, Pro-caspase-3, cleaved caspase-3, phosphorylated (p-)Smad2, Smad2, α-SMA, MMP9, ATG7, p62, beclin 1, p-AMPK and AMPK in HTFs to determine the mechanism by which LINC01605 regulates the formation and development of HS. Moreover, a Transwell assay was performed to detect the migratory ability of HTFs. The results demonstrated that LINC01605 was significantly upregulated in HS tissues compared with that in normal (control/healthy) tissues. In addition, vimentin was highly expressed in HTFs, whereas keratin was expressed at a low level. Also, in HTFs, LINC01605 knockdown inhibited cell viability by inducing apoptosis, decreasing Smad2 activation and inhibiting autophagy. Furthermore, LINC01605 knockdown significantly inhibited the migratory ability of HTFs. Transfection with LINC01605 small interference RNAs significantly downregulated the expression levels of p-Smad2, α-SMA and MMP9 in HTFs. Furthermore, LINC01605 knockdown notably inhibited the viability and migration, and induced the apoptosis of HTFs, the effects of which were reversed following treatment with TGF-β. Taken together, the results of the present study suggested that LINC01605 knockdown may inhibit the viability of HTFs by inducing the apoptotic pathway. These findings may provide novel directions for the treatment of HS.
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Affiliation(s)
- Qifei Shang
- Department of Ophthalmology, Fuyang People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
| | - Yanhua Yang
- Department of Ophthalmology, Fuyang People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
| | - Hangzhu Li
- Department of Ophthalmology, Fuyang People's Hospital, Hangzhou, Zhejiang 311400, P.R. China
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Varani J, McClintock SD, Aslam MN. Cell-Matrix Interactions Contribute to Barrier Function in Human Colon Organoids. Front Med (Lausanne) 2022; 9:838975. [PMID: 35360746 PMCID: PMC8960989 DOI: 10.3389/fmed.2022.838975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 02/10/2022] [Indexed: 11/13/2022] Open
Abstract
The importance of cell-matrix adhesion to barrier control in the colon is unclear. The goals of the present study were to: (i) determine if disruption of colon epithelial cell interactions with the extracellular matrix alters permeability control measurement and (ii) determine if increasing the elaboration of protein components of cell-matrix adhesion complexes can mitigate the effects of cell-matrix disruption. Human colon organoids were interrogated for transepithelial electrical resistance (TEER) under control conditions and in the presence of Aquamin®, a multi-mineral product. A function-blocking antibody directed at the C-terminal region of the laminin α chain was used in parallel. The effects of Aquamin® on cell-matrix adhesion protein expression were determined in a proteomic screen and by Western blotting. Aquamin® increased the expression of multiple basement membrane, hemidesmosomal and focal adhesion proteins as well as keratin 8 and 18. TEER values were higher in the presence of Aquamin® than they were under control conditions. The blocking antibody reduced TEER values under both conditions but was most effective in the absence of Aquamin®, where expression of cell-matrix adhesion proteins was lower to begin with. These findings provide evidence that cell-matrix interactions contribute to barrier control in the colon.
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Enhanced keratin extraction from wool waste using a deep eutectic solvent. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-021-02029-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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26
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Ho M, Thompson B, Fisk JN, Nebert DW, Bruford EA, Vasiliou V, Bunick CG. Update of the keratin gene family: evolution, tissue-specific expression patterns, and relevance to clinical disorders. Hum Genomics 2022; 16:1. [PMID: 34991727 PMCID: PMC8733776 DOI: 10.1186/s40246-021-00374-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 12/17/2021] [Indexed: 12/15/2022] Open
Abstract
Intermediate filament (IntFil) genes arose during early metazoan evolution, to provide mechanical support for plasma membranes contacting/interacting with other cells and the extracellular matrix. Keratin genes comprise the largest subset of IntFil genes. Whereas the first keratin gene appeared in sponge, and three genes in arthropods, more rapid increases in keratin genes occurred in lungfish and amphibian genomes, concomitant with land animal-sea animal divergence (~ 440 to 410 million years ago). Human, mouse and zebrafish genomes contain 18, 17 and 24 non-keratin IntFil genes, respectively. Human has 27 of 28 type I "acidic" keratin genes clustered at chromosome (Chr) 17q21.2, and all 26 type II "basic" keratin genes clustered at Chr 12q13.13. Mouse has 27 of 28 type I keratin genes clustered on Chr 11, and all 26 type II clustered on Chr 15. Zebrafish has 18 type I keratin genes scattered on five chromosomes, and 3 type II keratin genes on two chromosomes. Types I and II keratin clusters-reflecting evolutionary blooms of keratin genes along one chromosomal segment-are found in all land animal genomes examined, but not fishes; such rapid gene expansions likely reflect sudden requirements for many novel paralogous proteins having divergent functions to enhance species survival following sea-to-land transition. Using data from the Genotype-Tissue Expression (GTEx) project, tissue-specific keratin expression throughout the human body was reconstructed. Clustering of gene expression patterns revealed similarities in tissue-specific expression patterns for previously described "keratin pairs" (i.e., KRT1/KRT10, KRT8/KRT18, KRT5/KRT14, KRT6/KRT16 and KRT6/KRT17 proteins). The ClinVar database currently lists 26 human disease-causing variants within the various domains of keratin proteins.
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Affiliation(s)
- Minh Ho
- Department of Dermatology, Yale University, 333 Cedar St., LCI 501, PO Box 208059, New Haven, CT, 06520-8059, USA
| | - Brian Thompson
- Department of Environmental Health Sciences, Yale School of Public Health, New Haven, CT, 06511, USA
| | - Jeffrey Nicholas Fisk
- Program of Computational Biology and Bioinformatics, Yale University, New Haven, CT, 06511, USA
| | - Daniel W Nebert
- Departments of Pediatrics and Molecular and Developmental Biology, Cincinnati Children's Research Center, Cincinnati, OH, 45229, USA
- Department of Environmental Health and Center for Environmental Genetics, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
| | - Elspeth A Bruford
- HUGO Gene Nomenclature Committee (HGNC), EMBL-EBI, Wellcome Genome Campus, Hinxton, Cambridge, CB10 1SD, UK
- Department of Haematology, University of Cambridge, Cambridge, CB2 0XY, UK
| | - Vasilis Vasiliou
- Department of Environmental Health Sciences, Yale School of Public Health, New Haven, CT, 06511, USA
| | - Christopher G Bunick
- Department of Dermatology, Yale University, 333 Cedar St., LCI 501, PO Box 208059, New Haven, CT, 06520-8059, USA.
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, 06520, USA.
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27
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Casaburi G, Wei J, Kazi S, Liu J, Wang K, Tao GZ, Lin PY, Dunn JCY, Henrick BM, Frese SA, Sylvester KG. Metabolic model of necrotizing enterocolitis in the premature newborn gut resulting from enteric dysbiosis. Front Pediatr 2022; 10:893059. [PMID: 36081629 PMCID: PMC9445129 DOI: 10.3389/fped.2022.893059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 06/24/2022] [Indexed: 11/29/2022] Open
Abstract
Necrotizing enterocolitis (NEC) is a leading cause of premature newborn morbidity and mortality. The clinical features of NEC consistently include prematurity, gut dysbiosis and enteral inflammation, yet the pathogenesis remains obscure. Herein we combine metagenomics and targeted metabolomics, with functional in vivo and in vitro assessment, to define a novel molecular mechanism of NEC. One thousand six hundred and forty seven publicly available metagenomics datasets were analyzed (NEC = 245; healthy = 1,402) using artificial intelligence methodologies. Targeted metabolomic profiling was used to quantify the concentration of specified fecal metabolites at NEC onset (n = 8), during recovery (n = 6), and in age matched controls (n = 10). Toxicity assays of discovered metabolites were performed in vivo in mice and in vitro using human intestinal epithelial cells. Metagenomic and targeted metabolomic analyses revealed significant differences in pyruvate fermentation pathways and associated intermediates. Notably, the short chain fatty acid formate was elevated in the stool of NEC patients at disease onset (P = 0.005) dissipated during recovery (P = 0.02) and positively correlated with degree of intestinal injury (r 2 = 0.86). In vitro, formate caused enterocyte cytotoxicity in human cells through necroptosis (P < 0.01). In vivo, luminal formate caused significant dose and development dependent NEC-like injury in newborn mice. Enterobacter cloacae and Klebsiella pneumoniae were the most discriminatory taxa related to NEC dysbiosis and increased formate production. Together, these data suggest a novel biochemical mechanism of NEC through the microbial production of formate. Clinical efforts to prevent NEC should focus on reducing the functional consequences of newborn gut dysbiosis associated metabolic pathways.
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Affiliation(s)
| | - Jingjing Wei
- Department of Surgery, Stanford University, Stanford, CA, United States.,Department of Pediatrics, Shanxi Medical University, Taiyuan, China
| | - Sufyan Kazi
- Evolve Biosystems, Inc., Davis, CA, United States
| | - Junlin Liu
- Department of Surgery, Stanford University, Stanford, CA, United States.,Department of General Surgery, The People's Hospital of Liuyang City, Liuyang, China
| | - Kewei Wang
- Department of Surgery, Stanford University, Stanford, CA, United States.,Department of Gastrointestinal Surgery, The First Hospital of China Medical University, Shenyang, China
| | - Guo-Zhong Tao
- Department of Surgery, Stanford University, Stanford, CA, United States
| | - Po-Yu Lin
- Department of Surgery, Stanford University, Stanford, CA, United States
| | - James C Y Dunn
- Department of Surgery, Stanford University, Stanford, CA, United States
| | - Bethany M Henrick
- Evolve Biosystems, Inc., Davis, CA, United States.,Department of Food Science and Technology, University of Nebraska, Lincoln, NE, United States
| | - Steven A Frese
- Evolve Biosystems, Inc., Davis, CA, United States.,Department of Food Science and Technology, University of Nebraska, Lincoln, NE, United States.,Department of Nutrition, University of Nevada Reno, Reno, NV, United States
| | - Karl G Sylvester
- Department of Surgery, Stanford University, Stanford, CA, United States
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28
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Stenvall CGA, Tayyab M, Grönroos TJ, Ilomäki MA, Viiri K, Ridge KM, Polari L, Toivola DM. Targeted deletion of keratin 8 in intestinal epithelial cells disrupts tissue integrity and predisposes to tumorigenesis in the colon. Cell Mol Life Sci 2021; 79:10. [PMID: 34951664 PMCID: PMC8709826 DOI: 10.1007/s00018-021-04081-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/24/2021] [Accepted: 12/04/2021] [Indexed: 01/08/2023]
Abstract
Keratin 8 (K8) is the main intestinal epithelial intermediate filament protein with proposed roles for colonic epithelial cell integrity. Here, we used mice lacking K8 in intestinal epithelial cells (floxed K8 and Villin-Cre1000 and Villin-CreERt2) to investigate the cell-specific roles of intestinal epithelial K8 for colonocyte function and pathologies. Intestinal epithelial K8 deletion decreased K8 partner proteins, K18-K20, 75-95%, and the remaining keratin filaments were located at the colonocyte apical regions with type II K7, which decreased 30%. 2-Deoxy-2-[18F]-fluoroglucose positron emission tomography in vivo imaging identified a metabolic phenotype in the lower gut of the conditional K8 knockouts. These mice developed intestinal barrier leakiness, mild diarrhea, and epithelial damage, especially in the proximal colon. Mice exhibited shifted differentiation from enterocytes to goblet cells, displayed longer crypts and an increased number of Ki67 + transit-amplifying cells in the colon. Significant proproliferative and regenerative signaling occurred in the IL-22, STAT3, and pRb pathways, with minor effects on inflammatory parameters, which, however, increased in aging mice. Importantly, colonocyte K8 deletion induced a dramatically increased sensitivity to azoxymethane-induced tumorigenesis. In conclusion, intestinal epithelial K8 plays a significant role in colonocyte epithelial integrity maintenance, proliferation regulation and tumor suppression.
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Affiliation(s)
- Carl-Gustaf A Stenvall
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, BioCity, Tykistökatu 6A, N20520, Turku, Finland
| | - Mina Tayyab
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, BioCity, Tykistökatu 6A, N20520, Turku, Finland
| | - Tove J Grönroos
- Turku PET Centre, University of Turku, Turku, Finland
- Medicity Research Laboratories, University of Turku, Turku, Finland
| | - Maria A Ilomäki
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, BioCity, Tykistökatu 6A, N20520, Turku, Finland
| | - Keijo Viiri
- Celiac Disease Research Center, Faculty of Medicine and Health Technology, Tampere University, Tampere University Hospital, Tampere, Finland
| | - Karen M Ridge
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Lauri Polari
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, BioCity, Tykistökatu 6A, N20520, Turku, Finland
| | - Diana M Toivola
- Cell Biology, Biosciences, Faculty of Science and Engineering, Åbo Akademi University, BioCity, Tykistökatu 6A, N20520, Turku, Finland.
- Turku Center for Disease Modeling, University of Turku, Turku, Finland.
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29
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Gross A, Zhou B, Bewersdorf L, Schwarz N, Schacht GM, Boor P, Hoeft K, Hoffmann B, Fuchs E, Kramann R, Merkel R, Leube RE, Strnad P. Desmoplakin Maintains Transcellular Keratin Scaffolding and Protects From Intestinal Injury. Cell Mol Gastroenterol Hepatol 2021; 13:1181-1200. [PMID: 34929421 PMCID: PMC8873596 DOI: 10.1016/j.jcmgh.2021.12.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND & AIMS Desmosomes are intercellular junctions connecting keratin intermediate filaments of neighboring cells. The cadherins desmoglein 2 (Dsg2) and desmocollin 2 mediate cell-cell adhesion, whereas desmoplakin (Dsp) provides the attachment of desmosomes to keratins. Although the importance of the desmosome-keratin network is well established in mechanically challenged tissues, we aimed to assess the currently understudied function of desmosomal proteins in intestinal epithelia. METHODS We analyzed the intestine-specific villin-Cre DSP (DSPΔIEC) and the combined intestine-specific DSG2/DSPΔIEC (ΔDsg2/Dsp) knockout mice. Cross-breeding with keratin 8-yellow fluorescent protein knock-in mice and generation of organoids was performed to visualize the keratin network. A Dsp-deficient colorectal carcinoma HT29-derived cell line was generated and the role of Dsp in adhesion and mechanical stress was studied in dispase assays, after exposure to uniaxial cell stretching and during scratch assay. RESULTS The intestine of DSPΔIEC mice was histopathologically inconspicuous. Intestinal epithelial cells, however, showed an accelerated migration along the crypt and an enhanced shedding into the lumen. Increased intestinal permeability and altered levels of desmosomal proteins were detected. An inconspicuous phenotype also was seen in ΔDsg2/Dsp mice. After dextran sodium sulfate treatment, DSPΔIEC mice developed more pronounced colitis. A retracted keratin network was seen in the intestinal epithelium of DSPΔIEC/keratin 8-yellow fluorescent protein mice and organoids derived from these mice presented a collapsed keratin network. The level, phosphorylation status, and solubility of keratins were not affected. Dsp-deficient HT29 cells had an impaired cell adhesion and suffered from increased cellular damage after stretch. CONCLUSIONS Our results show that Dsp is required for proper keratin network architecture in intestinal epithelia, mechanical resilience, and adhesion, thereby protecting from injury.
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Affiliation(s)
- Annika Gross
- Department of Internal Medicine III, University Hospital Aachen, Aachen, Germany
| | - Biaohuan Zhou
- Department of Internal Medicine III, University Hospital Aachen, Aachen, Germany
| | - Lisa Bewersdorf
- Department of Internal Medicine III, University Hospital Aachen, Aachen, Germany
| | - Nicole Schwarz
- Institute of Molecular and Cellular Anatomy, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Gabriel M. Schacht
- Department of Internal Medicine III, University Hospital Aachen, Aachen, Germany
| | - Peter Boor
- Institute of Pathology, Department of Nephrology, University Hospital Aachen, Aachen, Germany
| | - Konrad Hoeft
- Department of Medicine II, University Hospital Aachen, Aachen, Germany
| | - Bernd Hoffmann
- Institute of Biological Information Processing 2, Mechanobiology, Forschungszentrum Jülich, Jülich, Germany
| | - Elaine Fuchs
- Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, Howard Hughes Medical Institute, The Rockefeller University, New York, New York
| | - Rafael Kramann
- Department of Medicine II, University Hospital Aachen, Aachen, Germany,Institute of Experimental Medicine and Systems Biology, Rheinisch-Westfaelische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Rudolf Merkel
- Institute of Biological Information Processing 2, Mechanobiology, Forschungszentrum Jülich, Jülich, Germany
| | - Rudolf E. Leube
- Institute of Molecular and Cellular Anatomy, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, Aachen, Germany
| | - Pavel Strnad
- Department of Internal Medicine III, University Hospital Aachen, Aachen, Germany,Correspondence Address correspondence to: Pavel Strnad, MD, Department of Internal Medicine III, University Hospital Aachen, Pauwelsstraße 30, D-52074, Aachen, Germany
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30
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Bruun J, Eide PW, Bergsland CH, Bruck O, Svindland A, Arjama M, Välimäki K, Bjørnslett M, Guren MG, Kallioniemi O, Nesbakken A, Lothe RA, Pellinen T. E-cadherin is a robust prognostic biomarker in colorectal cancer and low expression is associated with sensitivity to inhibitors of topoisomerase, aurora, and HSP90 in preclinical models. Mol Oncol 2021; 16:2312-2329. [PMID: 34890102 PMCID: PMC9208074 DOI: 10.1002/1878-0261.13159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 11/10/2021] [Accepted: 12/09/2021] [Indexed: 12/24/2022] Open
Abstract
Cell–cell and cell–matrix adhesion proteins that have been implicated in colorectal epithelial integrity and epithelial‐to‐mesenchymal transition could be robust prognostic and potential predictive biomarkers for standard and novel therapies. We analyzed in situ protein expression of E‐cadherin (ECAD), integrin β4 (ITGB4), zonula occludens 1 (ZO‐1), and cytokeratins in a single‐hospital series of Norwegian patients with colorectal cancer (CRC) stages I–IV (n = 922) using multiplex fluorescence‐based immunohistochemistry (mfIHC) on tissue microarrays. Pharmacoproteomic associations were explored in 35 CRC cell lines annotated with drug sensitivity data on > 400 approved and investigational drugs. ECAD, ITGB4, and ZO‐1 were positively associated with survival, while cytokeratins were negatively associated with survival. Only ECAD showed independent prognostic value in multivariable Cox models. Clinical and molecular associations for ECAD were technically validated on a different mfIHC platform, and the prognostic value was validated in another Norwegian series (n = 798). In preclinical models, low and high ECAD expression differentially associated with sensitivity to topoisomerase, aurora, and HSP90 inhibitors, and EGFR inhibitors. E‐cadherin protein expression is a robust prognostic biomarker with potential clinical utility in CRC.
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Affiliation(s)
- Jarle Bruun
- Department of Molecular Oncology, Institute for Cancer Research, Oslo University Hospital, Norway.,K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway
| | - Peter W Eide
- Department of Molecular Oncology, Institute for Cancer Research, Oslo University Hospital, Norway.,K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway
| | - Christian Holst Bergsland
- Department of Molecular Oncology, Institute for Cancer Research, Oslo University Hospital, Norway.,K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway
| | - Oscar Bruck
- Hematology Research Unit Helsinki, University of Helsinki and Comprehensive Cancer Center, Helsinki University Hospital, Finland
| | - Aud Svindland
- K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway.,Institute for Clinical Medicine, Faculty of Medicine, University of Oslo, Norway.,Department of Pathology, Oslo University Hospital, Norway
| | - Mariliina Arjama
- Institute for Molecular Medicine Finland, HiLIFE, University of Helsinki, Finland
| | - Katja Välimäki
- Institute for Molecular Medicine Finland, HiLIFE, University of Helsinki, Finland
| | - Merete Bjørnslett
- Department of Molecular Oncology, Institute for Cancer Research, Oslo University Hospital, Norway.,K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway
| | - Marianne G Guren
- K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway.,Department of Oncology, Oslo University Hospital, Norway
| | - Olli Kallioniemi
- Institute for Molecular Medicine Finland, HiLIFE, University of Helsinki, Finland.,Science for Life Laboratory, Department of Oncology & Pathology, Karolinska Institutet, Stockholm, Sweden
| | - Arild Nesbakken
- K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway.,Institute for Clinical Medicine, Faculty of Medicine, University of Oslo, Norway.,Department of Gastrointestinal Surgery, Oslo University Hospital, Norway
| | - Ragnhild A Lothe
- Department of Molecular Oncology, Institute for Cancer Research, Oslo University Hospital, Norway.,K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway.,Institute for Clinical Medicine, Faculty of Medicine, University of Oslo, Norway
| | - Teijo Pellinen
- K.G. Jebsen Colorectal Cancer Research Centre, Division for Cancer Medicine, Oslo University Hospital, Norway.,Institute for Molecular Medicine Finland, HiLIFE, University of Helsinki, Finland
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31
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Lu Y, Zhou C, Zhu M, Fu Z, Shi Y, Li M, Wang W, Zhu S, Jiang B, Luo Y, Su S. Traditional chinese medicine syndromes classification associates with tumor cell and microenvironment heterogeneity in colorectal cancer: a single cell RNA sequencing analysis. Chin Med 2021; 16:133. [PMID: 34876190 PMCID: PMC8650518 DOI: 10.1186/s13020-021-00547-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 11/27/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is one of the common gastrointestinal malignancies, tumor heterogeneity is the main cause of refractory CRC. Syndrome differentiation is the premise of individualized treatment of traditional Chinese medicine (TCM), but TCM syndrome lacks objective identification in CRC. This study is to investigate the correlation and significance of tumor heterogeneity and TCM syndromes classification in CRC. METHODS In this study, we using scRNA-seq technology, investigate the significance of tumor heterogeneity in TCM syndromes classification on CRC. RESULTS The results showed that 662 cells isolated from 11 primary CRC tumors are divided into 14 different cell clusters, and each cell subtype and its genes have different functions and signal transduction pathways, indicating significant heterogeneity. CRC tumor cell clusters have different proportions in Excess, Deficiency and Deficiency-Excess syndromes, and have their own characteristic genes, gene co-expression networks, gene functional interpretations as well as monocle functional evolution. Moreover, there were significant differences between the high expressions of MUC2, REG4, COL1A2, POSTN, SDPR, GPX1, ELF3, KRT8, KRT18, KRT19, FN1, SERPINE1, TCF4 and ZEB1 genes in Excess and Deficiency syndrome classification in CRC (P < 0.01). CONCLUSIONS The Excess and Deficiency syndromes classification may be related to tumor heterogeneity and its microenvironment in CRC.
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Affiliation(s)
- Yiyu Lu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Chungen Zhou
- Department of Anorectal, Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, 210001, China
| | - Meidong Zhu
- Department of Liver and Gallbladder Surgery, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | | | - Yong Shi
- Cinoasia Institute, Shanghai, 200438, China
| | - Min Li
- Department of Oncology, Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, 210001, China
| | - Wenhai Wang
- Department of Oncology, Shanghai Baoshan Hospital of Integrated Traditional Chinese Medicine and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, 201999, China
| | - Shibo Zhu
- Center for Pharmacogenomics, School of Life Sciences, Fudan University, Shanghai, 200438, China
| | - Bin Jiang
- Department of Anorectal, Nanjing Hospital of Chinese Medicine, Nanjing University of Chinese Medicine, Nanjing, 210001, China.
| | - Yunquan Luo
- Department of Liver and Gallbladder Surgery, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
| | - Shibing Su
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China.
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32
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Wu J, Niu J, Li M, Miao Y. Keratin 1 maintains the intestinal barrier in ulcerative colitis. Genes Genomics 2021; 43:1389-1402. [PMID: 34562265 DOI: 10.1007/s13258-021-01166-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Accepted: 09/14/2021] [Indexed: 12/20/2022]
Abstract
BACKGROUND The intestinal mechanical barrier plays a key role in the pathogenesis of ulcerative colitis (UC). Our previous study showed keratin 1 (KRT1) was downregulated in UC, but the mechanism by which KRT1 affects the intestinal barrier remains unknown. OBJECTIVES To explore the mechanism of KRT1 in the intestinal barrier in UC. METHODS Colonic tissues were collected from 20 UC patients before and after mucosal healing (MH) and 15 healthy controls. The expression of KRT1 was measured by PCR, western blotting and immunohistochemistry (IHC). A dextran sulfate sodium (DSS)-induced colitis model was established in krt1 transgenic (TG) mice, and the mice were treated with methylprednisolone (MP) to explore the role of KRT1 in the intestinal barrier. Inflammation was evaluated through the DAI score, colon, spleen and H&E. The expression of KRT1 and tight junction (TJ) proteins in mouse was analysed by the same methods. RESULTS The transcription and expression of KRT1 in UC was decreased and recovered after MH but did not reach the level of the healthy controls. Similar to the clinical results, the expression of krt1 was decreased in DSS-induced colitis and upregulated after MP. Moreover, the krt1 TG group exhibited less inflammation than wild-type (WT) group. The expression of Occludin and ZO-1 decreased after DSS induction, the decreases in Occludin and ZO-1 in the krt1 TG group were lower than WT group, which was significantly increased after MP, while the expression of Claudin-2 exhibited the opposite effect. CONCLUSIONS Keratin 1 maintains the intestinal barrier by upregulating TJ proteins in UC.
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Affiliation(s)
- Jing Wu
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, No. 295 Xichang Road, Kunming, 650032, Yunnan, China
| | - Junkun Niu
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, No. 295 Xichang Road, Kunming, 650032, Yunnan, China
| | - Maojuan Li
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, No. 295 Xichang Road, Kunming, 650032, Yunnan, China
| | - Yinglei Miao
- Department of Gastroenterology, The First Affiliated Hospital of Kunming Medical University, No. 295 Xichang Road, Kunming, 650032, Yunnan, China.
- Yunnan Province Clinical Research Center for Digestive Diseases, Kunming, Yunnan, China.
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33
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Evans CA, Corfe BM. Colorectal keratins: Integrating nutrition, metabolism and colorectal health. Semin Cell Dev Biol 2021; 128:103-111. [PMID: 34481710 DOI: 10.1016/j.semcdb.2021.08.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 08/09/2021] [Accepted: 08/18/2021] [Indexed: 01/12/2023]
Abstract
The colon mucosa is lined with crypts of circa 300 cells, forming a continuous barrier whose roles include absorption of water, recovery of metabolic energy sources (notably short chain fatty acids), secretion of a protective mucus barrier, and physiological signalling. There is high turnover and replenishment of cells in the mucosa, disruption of this may lead to bowel pathologies including cancer and inflammatory bowel disease. Keratins have been implicated in the processes of cell death, epithelial integrity, response to inflammation and as a result are often described as guardians of the colonic epithelium. Keratin proteins carry extensive post-translational modifications, the cofactors for kinases, acetyl transferases and other modification-regulating enzymes are themselves products of metabolism. A cluster of studies has begun to reveal a bidirectional relationship between keratin form and function and metabolism. In this paper we hypothesise a mechanistic interaction between keratins and metabolism is governed through regulation of post-translational modifications and may contribute significantly to the normal functioning of the colon, placing keratins at the centre of a nutrition-metabolism-health triangle.
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Affiliation(s)
- Caroline A Evans
- ChELSI Institute, Department of Chemical and Biological Engineering, University of Sheffield, Mappin St, S1 3JD Sheffield, United Kingdom
| | - Bernard M Corfe
- Population Health Sciences Institute, Human Nutrition Research Centre, Faculty of Medical Sciences, Newcastle University, Newcastle NE2 4HH, United Kingdom.
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34
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Alam CM, Baghestani S, Pajari A, Omary MB, Toivola DM. Keratin 7 Is a Constituent of the Keratin Network in Mouse Pancreatic Islets and Is Upregulated in Experimental Diabetes. Int J Mol Sci 2021; 22:ijms22157784. [PMID: 34360548 PMCID: PMC8346022 DOI: 10.3390/ijms22157784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/08/2021] [Accepted: 07/13/2021] [Indexed: 11/16/2022] Open
Abstract
Keratin (K) 7 is an intermediate filament protein expressed in ducts and glands of simple epithelial organs and in urothelial tissues. In the pancreas, K7 is expressed in exocrine ducts, and apico-laterally in acinar cells. Here, we report K7 expression with K8 and K18 in the endocrine islets of Langerhans in mice. K7 filament formation in islet and MIN6 β-cells is dependent on the presence and levels of K18. K18-knockout (K18‒/‒) mice have undetectable islet K7 and K8 proteins, while K7 and K18 are downregulated in K8‒/‒ islets. K7, akin to F-actin, is concentrated at the apical vertex of β-cells in wild-type mice and along the lateral membrane, in addition to forming a fine cytoplasmic network. In K8‒/‒ β-cells, apical K7 remains, but lateral keratin bundles are displaced and cytoplasmic filaments are scarce. Islet K7, rather than K8, is increased in K18 over-expressing mice and the K18-R90C mutation disrupts K7 filaments in mouse β-cells and in MIN6 cells. Notably, islet K7 filament networks significantly increase and expand in the perinuclear regions when examined in the streptozotocin diabetes model. Hence, K7 represents a significant component of the murine islet keratin network and becomes markedly upregulated during experimental diabetes.
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Affiliation(s)
- Catharina M. Alam
- Department of Biosciences, Cell Biology, Åbo Akademi University, Tykistökatu 6A, BioCity 2nd Floor, FIN-20520 Turku, Finland; (S.B.); (A.P.)
- Correspondence: (C.M.A.); (D.M.T.)
| | - Sarah Baghestani
- Department of Biosciences, Cell Biology, Åbo Akademi University, Tykistökatu 6A, BioCity 2nd Floor, FIN-20520 Turku, Finland; (S.B.); (A.P.)
| | - Ada Pajari
- Department of Biosciences, Cell Biology, Åbo Akademi University, Tykistökatu 6A, BioCity 2nd Floor, FIN-20520 Turku, Finland; (S.B.); (A.P.)
| | - M. Bishr Omary
- Center for Advanced Biotechnology and Medicine, Rutgers University, Piscataway, NJ 08854, USA;
| | - Diana M. Toivola
- Department of Biosciences, Cell Biology, Åbo Akademi University, Tykistökatu 6A, BioCity 2nd Floor, FIN-20520 Turku, Finland; (S.B.); (A.P.)
- Turku Center for Disease Modeling, University of Turku, Kiinamyllynkatu 10, FIN-20520 Turku, Finland
- Correspondence: (C.M.A.); (D.M.T.)
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Zhou Y, Qin W, Zhong H, Zhang H, Zhou L. Chromosome-level assembly of the Hypophthalmichthys molitrix (Cypriniformes: Cyprinidae) genome provides insights into its ecological adaptation. Genomics 2021; 113:2944-2952. [PMID: 34153498 DOI: 10.1016/j.ygeno.2021.06.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Revised: 06/13/2021] [Accepted: 06/16/2021] [Indexed: 10/21/2022]
Abstract
Hypophthalmichthys molitrix (silver carp) is phytoplanktivorous and is an economically and ecologically important fish species. As a well-known invasive species, a number of factors associated with the ecological adaptations of this species are largely unknown. Here, we present a chromosomal-level assembly of the species based on the PacBio Sequel II platform and Hi-C scaffolding technology. Based on the high-quality genome sequences and previous genome sequencing projects, a number of genes that were probably subject to positive selection reside in the genome of H. molitrix, and the last common ancestors of H. molitrix and H. nobilis were identified. Some of these genes may partially explain the mechanisms of H. molitrix for surviving damage due to toxic algae. Demographic history estimation suggests that the effective population size (EPS) of the species may have constantly increased along with the uplift of the Qinghai-Tibet Plateau, started to decline when quaternary glaciation started, and further declined during the Younger Dryas Period. Moreover, the introgression from H. nobilis to H. molitrix in North America was corroborated based on the whole-genome sequencing data, and the proportion of introgressed regions was estimated to be approximately 5.8%. Based on the high-quality assembly, the possible mechanisms by which H. molitrix adapts to its endemic and invaded locations were profiled.
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Affiliation(s)
- Yi Zhou
- State Key Laboratory of Developmental Biology of Freshwater Fish, Life Science College, Hunan Normal University, Changsha, Hunan, PR China
| | - Weiling Qin
- State Key Laboratory of Developmental Biology of Freshwater Fish, Life Science College, Hunan Normal University, Changsha, Hunan, PR China
| | - Huan Zhong
- Hunan Research Center of Engineering Technology for Utilization of Distinctive Aquatic Resource, College of Animal Science and Technology, Hunan Agricultural University, Changsha, China.
| | - Hong Zhang
- Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation, Beibu Gulf University, Qinzhou, China
| | - Luojing Zhou
- Hunan Provincial Key Laboratory of Nutrition and Quality Control of Aquatic Animals, Changsha University, Changsha, China
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Gurzu S, Jung I. Subcellular Expression of Maspin in Colorectal Cancer: Friend or Foe. Cancers (Basel) 2021; 13:cancers13030366. [PMID: 33498377 PMCID: PMC7864036 DOI: 10.3390/cancers13030366] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 01/12/2021] [Accepted: 01/19/2021] [Indexed: 02/05/2023] Open
Abstract
In this review the authors aimed to emphasize the practical value of nuclear expression of the mammary serine protease inhibitor (maspin), also known as serpin B5 protein, in colorectal carcinoma (CRC), from pre-malignant disorders to carcinogenesis and metastasis. As the role of maspin is controversial and not yet understood, the present update highlights the latest data revealed by literature which were filtrated through the daily experience of the authors, which was gained at microscopic examination of maspin expression in CRCs and other tumors for daily diagnosis. Data regarding the subcellular localization of maspin, in correlation with the microsatellite status, grade of tumor dedifferentiation, and epithelial-mesenchymal transition (EMT) phenomenon of the tumor buds were presented with details. An original observation refers to the maspin capacity to mark the tumor cells which are "at the point of budding" that were previously considered as having "hybrid EMT phenotype". It refers to the transitional status of tumor cell that is between "epithelial status" and "mesenchymal status". The second original hypothesis highlights the possible role of maspin in dysregulating the intestinal microbiota, in patients with idiopathic inflammatory bowel diseases (IBD) and inducing IBD-related CRC. The dynamic process of budding and EMT of tumor buds, possible mediated by maspin, needs further investigation and validation in many human CRC samples. The histological and molecular data reveal that synthesis of maspin-based therapeutics might represent a novel individualized therapeutic strategy for patients with CRC.
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Affiliation(s)
- Simona Gurzu
- Correspondence: ; Tel.: +40-7-4567-3550; Fax: +40-2-6521-0407
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