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Amodei L, Ruggieri AG, Potenza F, Viele M, Dufrusine B, Franciotti R, Pietrangelo L, Ardini M, Stuppia L, Federici L, De Laurenzi V, Sallese M. Sil1-deficient fibroblasts generate an aberrant extracellular matrix leading to tendon disorganisation in Marinesco-Sjögren syndrome. J Transl Med 2024; 22:787. [PMID: 39180052 PMCID: PMC11342654 DOI: 10.1186/s12967-024-05582-0] [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: 05/29/2024] [Accepted: 08/05/2024] [Indexed: 08/26/2024] Open
Abstract
BACKGROUND Marinesco-Sjögren syndrome (MSS) is an autosomal recessive neuromuscular disorder that arises in early childhood and is characterized by congenital cataracts, myopathy associated with muscle weakness, and degeneration of Purkinje neurons leading to ataxia. About 60% of MSS patients have loss-of-function mutations in the SIL1 gene. Sil1 is an endoplasmic reticulum (ER) protein required for the release of ADP from the master chaperone Bip, which in turn will release the folded proteins. The expression of non-functional Sil1 leads to the accumulation of unfolded proteins in the ER and this triggers the unfolded protein response (UPR). A dysfunctional UPR could be a key element in the pathogenesis of MSS, although our knowledge of the molecular pathology of MSS is still incomplete. METHODS RNA-Seq transcriptomics was analysed using the String database and the Ingenuity Pathway Analysis platform. Fluorescence confocal microscopy was used to study the remodelling of the extracellular matrix (ECM). Transmission electron microscopy (TEM) was used to reveal the morphology of the ECM in vitro and in mouse tendon. RESULTS Our transcriptomic analysis, performed on patient-derived fibroblasts, revealed 664 differentially expressed (DE) transcripts. Enrichment analysis of DE genes confirmed that the patient fibroblasts have a membrane trafficking issue. Furthermore, this analysis indicated that the extracellular space/ECM and the cell adhesion machinery, which together account for around 300 transcripts, could be affected in MSS. Functional assays showed that patient fibroblasts have a reduced capacity of ECM remodelling, reduced motility, and slower spreading during adhesion to Petri dishes. TEM micrographs of negative-stained ECM samples from these fibroblasts show differences of filaments in terms of morphology and size. Finally, structural analysis of the myotendinous junction of the soleus muscle and surrounding regions of the Achilles tendon revealed a disorganization of collagen fibres in the mouse model of MSS (woozy). CONCLUSIONS ECM alterations can affect the proper functioning of several organs, including those damaged in MSS such as the central nervous system, skeletal muscle, bone and lens. On this basis, we propose that aberrant ECM is a key pathological feature of MSS and may help explain most of its clinical manifestations.
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Affiliation(s)
- Laura Amodei
- Department of Innovative Technologies in Medicine and Dentistry, Chieti, Italy
- Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - Anna Giulia Ruggieri
- Department of Innovative Technologies in Medicine and Dentistry, Chieti, Italy
- Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - Francesca Potenza
- Department of Innovative Technologies in Medicine and Dentistry, Chieti, Italy
- Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - Marianna Viele
- Department of Innovative Technologies in Medicine and Dentistry, Chieti, Italy
- Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - Beatrice Dufrusine
- Department of Bioscience and Technology for Food Agriculture and Environment, University of Teramo, Teramo, 64100, Italy
| | | | | | - Matteo Ardini
- Department of Life, Health and Environmental Sciences, University of L'Aquila, L'Aquila, 67100, Italy
| | - Liborio Stuppia
- Center for Advanced Studies and Technology (CAST), Chieti, Italy
- Department of Psychological Health and Territorial Sciences, "G. d'Annunzio" University of Chieti-Pescara, Chieti, 66100, Italy
| | - Luca Federici
- Department of Innovative Technologies in Medicine and Dentistry, Chieti, Italy
- Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - Vincenzo De Laurenzi
- Department of Innovative Technologies in Medicine and Dentistry, Chieti, Italy
- Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - Michele Sallese
- Department of Innovative Technologies in Medicine and Dentistry, Chieti, Italy.
- Center for Advanced Studies and Technology (CAST), Chieti, Italy.
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Picker SM, Parker G, Gissen P. Features of Congenital Arthrogryposis Due to Abnormalities in Collagen Homeostasis, a Scoping Review. Int J Mol Sci 2023; 24:13545. [PMID: 37686358 PMCID: PMC10487887 DOI: 10.3390/ijms241713545] [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: 07/15/2023] [Revised: 08/30/2023] [Accepted: 08/30/2023] [Indexed: 09/10/2023] Open
Abstract
Congenital arthrogryposis (CA) refers to the presence of multiple contractures at birth. It is a feature of several inherited syndromes, notable amongst them are disorders of collagen formation. This review aims to characterize disorders that directly or indirectly impact collagen structure and function leading to CA in search for common phenotypic or pathophysiological features, possible genotype-phenotype correlation, and potential novel treatment approaches based on a better understanding of the underlying pathomechanism. Nine genes, corresponding to five clinical phenotypes, were identified after a literature search. The most notable trend was the extreme phenotype variability. Clinical features across all syndromes ranged from subtle with minimal congenital contractures, to severe with multiple congenital contractures and extra-articular features including skin, respiratory, or other manifestations. Five of the identified genes were involved in the function of the Lysyl Hydroxylase 2 or 3 enzymes, which enable the hydroxylation and/or glycosylation of lysyl residues to allow the formation of the collagen superstructure. Whilst current treatment approaches are post-natal surgical correction, there are also potential in-utero therapies being developed. Cyclosporin A showed promise in treating collagen VI disorders although there is an associated risk of immunosuppression. The treatments that could be in the clinical trials soon are the splice correction therapies in collagen VI-related disorders.
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Affiliation(s)
| | - George Parker
- Newcastle University Medical School, Newcastle NE2 4HH, UK;
| | - Paul Gissen
- National Institute for Health Research Great Ormond Street Hospital Biomedical Research Centre, University College London, London WC1N 1EH, UK
- Genetics and Genomic Medicine Department, Great Ormond Street Institute of Child Health, University College London, London WC1N 1EH, UK
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Song C, Hu Z, Xu D, Bian H, Lv J, Zhu X, Zhang Q, Su L, Yin H, Lu T, Li Y. STING signaling in inflammaging: a new target against musculoskeletal diseases. Front Immunol 2023; 14:1227364. [PMID: 37492580 PMCID: PMC10363987 DOI: 10.3389/fimmu.2023.1227364] [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: 05/23/2023] [Accepted: 06/20/2023] [Indexed: 07/27/2023] Open
Abstract
Stimulator of Interferon Gene (STING) is a critical signaling linker protein that plays a crucial role in the intrinsic immune response, particularly in the cytoplasmic DNA-mediated immune response in both pathogens and hosts. It is also involved in various signaling processes in vivo. The musculoskeletal system provides humans with morphology, support, stability, and movement. However, its aging can result in various diseases and negatively impact people's lives. While many studies have reported that cellular aging is a leading cause of musculoskeletal disorders, it also offers insight into potential treatments. Under pathological conditions, senescent osteoblasts, chondrocytes, myeloid cells, and muscle fibers exhibit persistent senescence-associated secretory phenotype (SASP), metabolic disturbances, and cell cycle arrest, which are closely linked to abnormal STING activation. The accumulation of cytoplasmic DNA due to chromatin escape from the nucleus following DNA damage or telomere shortening activates the cGAS-STING signaling pathway. Moreover, STING activation is also linked to mitochondrial dysfunction, epigenetic modifications, and impaired cytoplasmic DNA degradation. STING activation upregulates SASP and autophagy directly and indirectly promotes cell cycle arrest. Thus, STING may be involved in the onset and development of various age-related musculoskeletal disorders and represents a potential therapeutic target. In recent years, many STING modulators have been developed and used in the study of musculoskeletal disorders. Therefore, this paper summarizes the effects of STING signaling on the musculoskeletal system at the molecular level and current understanding of the mechanisms of endogenous active ligand production and accumulation. We also discuss the relationship between some age-related musculoskeletal disorders and STING, as well as the current status of STING modulator development.
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Affiliation(s)
- Chenyu Song
- Jiangsu CM Clinical Innovation Center of Degenerative Bone & Joint Disease, Wuxi TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Wuxi, China
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Zhuoyi Hu
- Jiangsu CM Clinical Innovation Center of Degenerative Bone & Joint Disease, Wuxi TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Wuxi, China
| | - Dingjun Xu
- Department of Orthopaedics, Wenzhou Hospital of Integrated Traditional Chinese and Western Medicine, Zhejiang, China
| | - Huihui Bian
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Juan Lv
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Xuanxuan Zhu
- Jiangsu CM Clinical Innovation Center of Degenerative Bone & Joint Disease, Wuxi TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Wuxi, China
| | - Qiang Zhang
- Jiangsu CM Clinical Innovation Center of Degenerative Bone & Joint Disease, Wuxi TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Wuxi, China
| | - Li Su
- Institute of Translational Medicine, Shanghai University, Shanghai, China
| | - Heng Yin
- Jiangsu CM Clinical Innovation Center of Degenerative Bone & Joint Disease, Wuxi TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Wuxi, China
| | - Tong Lu
- Department of Critical Care Medicine, Changshu Hospital Affiliated to Nanjing University of Chinese Medicine, Changshu, China
| | - Yinghua Li
- Institute of Translational Medicine, Shanghai University, Shanghai, China
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Tan A, Younis AZ, Evans A, Creighton JV, Coveny C, Boocock DJ, Sale C, Lavery GG, Coutts AS, Doig CL. PARP1 mediated PARylation contributes to myogenic progression and glucocorticoid transcriptional response. Cell Death Discov 2023; 9:133. [PMID: 37087471 PMCID: PMC10121420 DOI: 10.1038/s41420-023-01420-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 03/22/2023] [Accepted: 03/29/2023] [Indexed: 04/24/2023] Open
Abstract
The ADP-ribosyltransferase, PARP1 enzymatically generates and applies the post-translational modification, ADP-Ribose (ADPR). PARP1 roles in genome maintenance are well described, but recent work highlights roles in many fundamental processes including cellular identity and energy homeostasis. Herein, we show in both mouse and human skeletal muscle cells that PARP1-mediated PARylation is a regulator of the myogenic program and the muscle transcriptional response to steroid hormones. Chemical PARP1 modulation impacts the expression of major myocellular proteins, including troponins, key in dictating muscle contractile force. Whilst PARP1 in absence of DNA damage is often assumed to be basally inactive, we show PARylation to be acutely sensitive to extracellular glucose concentrations and the steroid hormone class, glucocorticoids which exert considerable authority over muscle tissue mass. Specifically, we find during myogenesis, a transient and significant rise in PAR. This early-stage differentiation event, if blocked with PARP1 inhibition, reduced the abundance of important muscle proteins in the fully differentiated myotubes. This suggests that PAR targets during early-stage differentiation are central to the proper development of the muscle contractile unit. We also show that reduced PARP1 in myoblasts impacts a variety of metabolic pathways in line with the recorded actions of glucocorticoids. Currently, as both regulators of myogenesis and muscle mass loss, glucocorticoids represent a clinical conundrum. Our work goes on to identify that PARP1 influences transcriptional activation by glucocorticoids of a subset of genes critical to human skeletal muscle pathology. These genes may therefore signify a regulatory battery of targets through which selective glucocorticoid modulation could be achieved. Collectively, our data provide clear links between PARP1-mediated PARylation and skeletal muscle homeostatic mechanisms crucial to tissue mass maintenance and endocrine response.
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Affiliation(s)
- Arnold Tan
- School of Science and Technology, Department of Biosciences, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Awais Z Younis
- School of Science and Technology, Department of Biosciences, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Alexander Evans
- School of Science and Technology, Department of Biosciences, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Jade V Creighton
- School of Science and Technology, Department of Biosciences, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Clare Coveny
- John van Geest Cancer Research Centre, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - David J Boocock
- John van Geest Cancer Research Centre, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Craig Sale
- Institute of Sport, Manchester Metropolitan University, Manchester, M1 7EL, UK
| | - Gareth G Lavery
- School of Science and Technology, Department of Biosciences, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Amanda S Coutts
- School of Science and Technology, Department of Biosciences, Nottingham Trent University, Nottingham, NG11 8NS, UK
| | - Craig L Doig
- School of Science and Technology, Department of Biosciences, Nottingham Trent University, Nottingham, NG11 8NS, UK.
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Bandzerewicz A, Gadomska-Gajadhur A. Into the Tissues: Extracellular Matrix and Its Artificial Substitutes: Cell Signalling Mechanisms. Cells 2022; 11:914. [PMID: 35269536 PMCID: PMC8909573 DOI: 10.3390/cells11050914] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/02/2022] [Accepted: 03/04/2022] [Indexed: 02/06/2023] Open
Abstract
The existence of orderly structures, such as tissues and organs is made possible by cell adhesion, i.e., the process by which cells attach to neighbouring cells and a supporting substance in the form of the extracellular matrix. The extracellular matrix is a three-dimensional structure composed of collagens, elastin, and various proteoglycans and glycoproteins. It is a storehouse for multiple signalling factors. Cells are informed of their correct connection to the matrix via receptors. Tissue disruption often prevents the natural reconstitution of the matrix. The use of appropriate implants is then required. This review is a compilation of crucial information on the structural and functional features of the extracellular matrix and the complex mechanisms of cell-cell connectivity. The possibilities of regenerating damaged tissues using an artificial matrix substitute are described, detailing the host response to the implant. An important issue is the surface properties of such an implant and the possibilities of their modification.
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Franco-Romero A, Sandri M. Role of autophagy in muscle disease. Mol Aspects Med 2021; 82:101041. [PMID: 34625292 DOI: 10.1016/j.mam.2021.101041] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 02/08/2023]
Abstract
Beside inherited muscle diseases many catabolic conditions such as insulin resistance, malnutrition, cancer growth, aging, infections, chronic inflammatory status, inactivity, obesity are characterized by loss of muscle mass, strength and function. The decrease of muscle quality and quantity increases morbidity, mortality and has a major impact on the quality of life. One of the pathogenetic mechanisms of muscle wasting is the dysregulation of the main protein and organelles quality control system of the cell: the autophagy-lysosome. This review will focus on the role of the autophagy-lysosome system in the different conditions of muscle loss. We will also dissect the signalling pathways that are involved in excessive or defective autophagy regulation. Finally, the state of the art of autophagy modulators that have been used in preclinical or clinical studies to ameliorate muscle mass will be also described.
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Affiliation(s)
- Anais Franco-Romero
- Venetian Institute of Molecular Medicine, via Orus 2, 35129, Padova, Italy; Department of Biomedical Science, University of Padova, via G. Colombo 3, 35100, Padova, Italy
| | - Marco Sandri
- Venetian Institute of Molecular Medicine, via Orus 2, 35129, Padova, Italy; Department of Biomedical Science, University of Padova, via G. Colombo 3, 35100, Padova, Italy; Myology Center, University of Padova, via G. Colombo 3, 35100, Padova, Italy; Department of Medicine, McGill University, Montreal, Canada.
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Kutluk MG, Kadem N, Bektas O, Randa NC, Tuncer GO, Albayrak P, Eminoglu T, Teber ST. Genotype-Phenotype Correlation of the Childhood-Onset Bethlem Myopathy in the Mediterranean Region of Turkey. Ann Indian Acad Neurol 2021; 24:547-551. [PMID: 34728949 PMCID: PMC8513947 DOI: 10.4103/aian.aian_1182_20] [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: 11/19/2020] [Revised: 12/08/2020] [Accepted: 12/21/2020] [Indexed: 11/24/2022] Open
Abstract
OBJECTIVES Collagen-VI-related myopathies are caused by both dominant and recessive mutations in the three collagen-VI-related genes (COL6A1, COL6A2, and COL6A3) and present as two different major clinical entities; Bethlem myopathy and Ullrich congenital muscular dystrophy. METHODS In this study, we evaluated the clinical, pathologic, and genetic features of 8 patients with Bethlem myopathy from 3 families. RESULTS We inspected disease course differences with age and mutations. Different variants in COL6A1 and COL6A2 genes were detected. Muscle MRI of the lower limbs showed a specific pattern of muscle involvement with variable severity of fatty infiltration. One family had essential hypertension. CONCLUSION Genotype-phenotype correlation studies are critical in determining gene or mutation-targeted therapies, patient follow-up, severity and progression prediction, and genetic counselling.
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Affiliation(s)
- Muhammet G. Kutluk
- Department of Paediatrics Neurology, Antalya Research and Training Hospital, Antalya, Turkey
| | - Naz Kadem
- Department of Paediatrics, Antalya Research and Training Hospital, Antalya, Turkey
| | - Omer Bektas
- Department of Paediatric Neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Nadide C. Randa
- Department of Medical Genetics, Antalya Research and Training Hospital, Antalya, Turkey
| | - Gökcen O. Tuncer
- Department of Paediatric Neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Pelin Albayrak
- Department of Paediatric Neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Tuba Eminoglu
- Department of Paediatric Metabolism, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Serap T. Teber
- Department of Paediatric Neurology, Ankara University Faculty of Medicine, Ankara, Turkey
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Bardakov SN, Deev RV, Magomedova RM, Umakhanova ZR, Allamand V, Gartioux C, Zulfugarov KZ, Akhmedova PG, Tsargush VA, Titova AA, Mavlikeev MO, Zorin VL, Chernets EN, Dalgatov GD, Konovalov FA, Isaev AA. Intrafamilial Phenotypic Variability of Collagen VI-Related Myopathy Due to a New Mutation in the COL6A1 Gene. J Neuromuscul Dis 2020; 8:273-285. [PMID: 33337382 PMCID: PMC8075389 DOI: 10.3233/jnd-200476] [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] [Indexed: 12/03/2022]
Abstract
A family of five male siblings (three survivors at 48, 53 and 58 years old; two deceased at 8 months old and 2.5 years old) demonstrating significant phenotypic variability ranging from intermediate to the myosclerotic like Bethlem myopathy is presented. Whole-exome sequencing (WES) identified a new homozygous missense mutation chr21:47402679 T > C in the canonical splice donor site of the second intron (c.227 + 2T>C) in the COL6A1 gene. mRNA analysis confirmed skipping of exon 2 encoding 925 amino-acids in 94–95% of resulting transcripts. Three sibs presented with intermediate phenotype of collagen VI-related dystrophies (48, 53 and 2.5 years old) while the fourth sibling (58 years old) was classified as Bethlem myopathy with spine rigidity. The two older siblings with the moderate progressive phenotype (48 and 53 years old) lost their ability to maintain a vertical posture caused by pronounced contractures of large joints, but continued to ambulate throughout life on fully bent legs without auxiliary means of support. Immunofluorescence analysis of dermal fibroblasts demonstrated that no type VI collagen was secreted in any of the siblings’ cells, regardless of clinical manifestations severity while fibroblast proliferation and colony formation ability was decreased. The detailed genetic and long term clinical data contribute to broadening the genotypic and phenotypic spectrum of COL6A1 related disease.
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Affiliation(s)
| | - Roman V Deev
- Human Stem Cells Institute, Moscow, Russia.,I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russia
| | | | | | - Valérie Allamand
- Sorbonne Université UPMC Paris 06 -Inserm UMRS974, Research Center in Myology, Hospital Pitié-Salpêtrière, Paris, France
| | - Corine Gartioux
- Sorbonne Université UPMC Paris 06 -Inserm UMRS974, Research Center in Myology, Hospital Pitié-Salpêtrière, Paris, France
| | | | | | | | - Angelina A Titova
- Institute of Fundamental Medicine and Biology, Kazan (Volga Region) Federal University, Kazan, Russia
| | - Mikhail O Mavlikeev
- I.I. Mechnikov North-Western State Medical University, St. Petersburg, Russia
| | | | | | - Gimat D Dalgatov
- Scientific-Clinical Center of Otorhinolaryngology FMBA of Russia Moscow, Russia
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Stromal microenvironment promoted infiltration in esophageal adenocarcinoma and squamous cell carcinoma: a multi-cohort gene-based analysis. Sci Rep 2020; 10:18589. [PMID: 33122682 PMCID: PMC7596515 DOI: 10.1038/s41598-020-75541-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 10/15/2020] [Indexed: 12/23/2022] Open
Abstract
The stromal microenvironment has been shown to affect the infiltration of esophageal carcinoma (ESCA), which is linked to prognosis. However, the complicated mechanism of how infiltration is influenced by the stromal microenvironment is not well-defined. In this study, a stromal activation classifier was established with ridge cox regression to calculate stroma scores for training (n = 182) and validation cohorts (n = 227) based on the stroma-related 32 hub genes identified by sequential bioinformatics algorithms. Patients with high stromal activation were associated with high T stage and poor prognosis in both esophagus adenocarcinoma and esophagus squamous cell carcinoma. Besides, comprehensive multi-omics analysis was used to outline stromal characterizations of 2 distinct stromal groups. Patients with activated tumor stoma showed high stromal cell infiltration (fibroblasts, endothelial cells, and monocyte macrophages), epithelial-mesenchymal transition, tumor angiogenesis and M2 macrophage polarization (CD163 and CD206). Tumor mutation burden of differential stromal groups was also depicted. In addition, a total of 6 stromal activation markers in ESCA were defined and involved in the function of carcinoma-associated fibroblasts that were crucial in the differentiation of distinct stromal characterizations. Based on these studies, a practical classifier for the stromal microenvironment was successfully proposed to predict the prognosis of ESCA patients.
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Kutluk MG, Kadem N, Bektas O, Randa NC, Tuncer GO, Albayrak P, Eminoglu T, Teber ST. A Novel Variant of COL6A2 Gene Causing Bethlem Myopathy and Evaluation of Essential Hypertension. Ann Indian Acad Neurol 2020; 24:280-282. [PMID: 34220088 PMCID: PMC8232516 DOI: 10.4103/aian.aian_247_20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 05/06/2020] [Accepted: 05/27/2020] [Indexed: 01/08/2023] Open
Affiliation(s)
- M Gultekin Kutluk
- Department of Paediatric Neurology, Antalya Research and Training Hospital, Antalya, Turkey
| | - Naz Kadem
- Department of Paediatrics, Antalya Research and Training Hospital, Antalya, Turkey
| | - Omer Bektas
- Department of Paediatric Neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Nadide Cemre Randa
- Department of Medical Genetics, Antalya Research and Training Hospital, Antalya, Turkey
| | - Gökcen Oz Tuncer
- Department of Paediatric Neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Pelin Albayrak
- Department of Paediatric Neurology, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Tuba Eminoglu
- Department of Paediatric Metabolism, Ankara University Faculty of Medicine, Ankara, Turkey
| | - Serap Tiras Teber
- Department of Paediatric Neurology, Ankara University Faculty of Medicine, Ankara, Turkey
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Coexistence of digenic mutations in the collagen VI genes (COL6A1 and COL6A3) leads to Bethlem myopathy. Clin Chim Acta 2020; 508:28-32. [PMID: 32389683 DOI: 10.1016/j.cca.2020.05.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 03/31/2020] [Accepted: 05/07/2020] [Indexed: 11/23/2022]
Abstract
INTRODUCTION Bethlem myopathy is a kind of collagen VI related myopathy which affects proximal skeletal muscles and leads to gait disturbance and multiple joint contractures with an onset in the first two decades of life. Lung function impairment (respiratory muscle and diaphragmatic weakness, ventilatory restriction, hypoxaemia and hypercapnia) and respiratory failure are part of the clinical spectrum and can occur in ambulatory patients. METHODOLOGY We carried out whole exome sequencing (WES) in combination with neuromuscular diseases-associated genes-filtering to detect the possible causative mutation(s) in a Korean family with Bethlem myopathy. An electrodiagnostic study showed myopathic pattern (normal nerve conduction study, and early recruitment and short amplitude muscle unit action potentials) in the proband. RESULTS Coexistence of digenic mutations in the collagen VI genes (COL6A1 and COL6A3) was identified by WES in the proband only: heterozygous missense mutations of the COL6A1 (NM_001848.2: c.823G > T, p.Gly275Trp; rs1556425467) and of the COL6A3 genes (NM_004369.3: c.9349G > A, p.Asp3117Asn; rs1226664855). COL6A3 mutation may be candidate as disease-associated variant, as far as it was found only in the proband harboring another heterozygous mutation in COL6A1 gene, previously reported as different pathogenic mutations (p.Gly275Arg and p.Gly275Glu) at the same codon in Bethlem myopathy. CONCLUSION Our findings suggest that the coexistence of these digenic mutations is rare, but it may be used for the risk evaluation of individuals with a possible susceptibility to Bethlem myopathy. Taken together, genetic diagnosis using WES is a useful approach for the identification of pathogenic mutations associated with Bethlem myopathy.
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