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Ding W, Bao S, Zhao Q, Hao W, Fang K, Xiao Y, Lin X, Zhao Z, Xu X, Cui X, Yang X, Yao L, Jin H, Zhang K, Guo J. Blocking ACSL6 Compromises Autophagy via FLI1-Mediated Downregulation of COLs to Radiosensitize Lung Cancer. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2403202. [PMID: 39206814 DOI: 10.1002/advs.202403202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 08/13/2024] [Indexed: 09/04/2024]
Abstract
Lung cancer (LC) is the leading cause of cancer-related mortality worldwide. Radiotherapy is the main component of LC treatment; however, its efficacy is often limited by radioresistance development, resulting in unsatisfactory clinical outcomes. Here, we found that LC radiosensitivity is up-regulated by decreased expression of long-chain acyl-CoA synthase 6 (ACSL6) after irradiation. Deletion of ACSL6 results in significant elevation of Friend leukemia integration 1 transcription factor (FLI1) and a marked decline of collagens (COLs). Blocking of ACSL6 impairs the tumor growth and upregulates FLI1, which reduces the levels of COLs and compromises irradiation-induced autophagy, leading to considerable therapeutic benefits during radiotherapy. Moreover, the direct interaction between ACSL6 and FLI1 and engagement between FLI1 and COLs indicates the involvement of the ACSL6-FLI1-COL axis. Finally, the potently adjusted autophagy flux reduces its otherwise contributive capability in surviving irradiation stress and leads to satisfactory radiosensitization for LC radiotherapy. These results demonstrate that enhanced ACSL6 expression promotes the aggressive performance of irradiated LC through increased FLI1-COL-mediated autophagy flux. Thus, the ACSL6-FLI1-Col-autophagy axis may be targeted to enhance the radiosensitivity of LC and improve the management of LC in radiotherapy.
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Affiliation(s)
- Wen Ding
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Shijun Bao
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Qingwei Zhao
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Wei Hao
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Kai Fang
- Department of Medicine College, Jiangnan University, Wuxi, Jiangsu, 214000, P. R. China
| | - Yanlan Xiao
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Xiaoting Lin
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Zhemeng Zhao
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Xinyi Xu
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
- College of Basic Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Xinyue Cui
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Xiwen Yang
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Liuhuan Yao
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
| | - Hai Jin
- Department of Cardiothoracic Surgery, Changhai Hospital, Naval Medical University, Shanghai, 200433, P. R. China
| | - Kun Zhang
- Department of Laboratory Medicine and Central Laboratory, Sichuan Academy of Medical Sciences, Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, No. 32, West Second Section, First Ring Road, Chengdu, Sichuan, 610072, P. R. China
| | - Jiaming Guo
- Department of Radiation Medicine, College of Naval Medicine, Naval Medical University, Shanghai, 200433, P. R. China
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Xing R, Yu H, Yu J, Zeng R, Xiang Z, Ma H, Li G, Zhao Y. Identification of key genes affecting ventilator-induced diaphragmatic dysfunction in diabetic mice. Front Genet 2024; 15:1387688. [PMID: 38784031 PMCID: PMC11112022 DOI: 10.3389/fgene.2024.1387688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 04/23/2024] [Indexed: 05/25/2024] Open
Abstract
Background Mechanical ventilation (MV) is often required in critically ill patients. However, prolonged mechanical ventilation can lead to Ventilator-induced diaphragmatic dysfunction (VIDD), resulting in difficulty in extubation after tracheal intubation, prolonged ICU stay, and increased mortality. At present, the incidence of diabetes is high in the world, and the prognosis of diabetic patients with mechanical ventilation is generally poor. Therefore, the role of diabetes in the development of VIDD needs to be discovered. Methods MV modeling was performed on C57 mice and DB mice, and the control group was set up in each group. After 12 h of mechanical ventilation, the muscle strength of the diaphragm was measured, and the muscle fiber immunofluorescence staining was used to verify the successful establishment of the MV model. RNA sequencing (RNA-seq) method was used to detect mRNA expression levels of the diaphragms of each group, and then differential expressed gene analysis, Heatmap analysis, WGCNA analysis, Venn analysis, GO and KEGG enrichment analysis were performed. qRT-PCR was used to verify the expression of the selected mRNAs. Results Our results showed that, compared with C57 control mice, the muscle strength and muscle fiber cross-sectional area of mice after mechanical ventilation decreased, and DB mice showed more obvious in this respect. RNA-seq showed that these differential expressed (DE) mRNAs were mainly related to genes such as extracellular matrix, collagen, elastic fiber and Fbxo32. GO and KEGG enrichment analysis showed that the signaling pathways associated with diabetes were mainly as follows: extracellular matrix (ECM), protein digestion and absorption, PI3K-Akt signaling pathway, calcium signaling pathway, MAPK signaling pathway and AGE-RAGE signaling pathway in diabetic complications, etc. ECM has the closest relationship with VIDD in diabetic mice. The key genes determined by WGCNA and Venn analysis were validated by quantitative real-time polymerase chain reaction (qRT-PCR), which exhibited trends similar to those observed by RNA-seq. Conclusion VIDD can be aggravated in diabetic environment. This study provides new evidence for mRNA changes after mechanical ventilation in diabetic mice, suggesting that ECM and collagen may play an important role in the pathophysiological mechanism and progression of VIDD in diabetic mice, and provides some clues for the research, diagnosis, and treatment of VIDD in diabetic context.
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Affiliation(s)
- Rongchun Xing
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
- The First College of Clinical Medical Science, Three Gorges University, Yichang, China
| | - Haibo Yu
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Jiangtao Yu
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Rong Zeng
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Zhijun Xiang
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
| | - Haoli Ma
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China
- Yichang Central People’s Hospital, Yichang, Hubei, China
| | - Gang Li
- Department of Biological Repositories, Zhongnan Hospital of Wuhan University, Wuhan, China
- Yichang Central People’s Hospital, Yichang, Hubei, China
| | - Yan Zhao
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
- Hubei Clinical Research Center for Emergency and Resuscitation, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, China
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Gregory CA, Ma J, Lomeli S. The coordinated activities of collagen VI and XII in maintenance of tissue structure, function and repair: evidence for a physical interaction. Front Mol Biosci 2024; 11:1376091. [PMID: 38606288 PMCID: PMC11007232 DOI: 10.3389/fmolb.2024.1376091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 03/14/2024] [Indexed: 04/13/2024] Open
Abstract
Collagen VI and collagen XII are structurally complex collagens of the extracellular matrix (ECM). Like all collagens, type VI and XII both possess triple-helical components that facilitate participation in the ECM network, but collagen VI and XII are distinct from the more abundant fibrillar collagens in that they also possess arrays of structurally globular modules with the capacity to propagate signaling to attached cells. Cell attachment to collagen VI and XII is known to regulate protective, proliferative or developmental processes through a variety of mechanisms, but a growing body of genetic and biochemical evidence suggests that at least some of these phenomena may be potentiated through mechanisms that require coordinated interaction between the two collagens. For example, genetic studies in humans have identified forms of myopathic Ehlers-Danlos syndrome with overlapping phenotypes that result from mutations in either collagen VI or XII, and biochemical and cell-based studies have identified accessory molecules that could form bridging interactions between the two collagens. However, the demonstration of a direct or ternary structural interaction between collagen VI or XII has not yet been reported. This Hypothesis and Theory review article examines the evidence that supports the existence of a functional complex between type VI and XII collagen in the ECM and discusses potential biological implications.
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Affiliation(s)
- Carl A. Gregory
- Department of Medical Physiology, Texas A&M School of Medicine, Bryan, TX, United States
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Gambarotto L, Metti S, Corpetti M, Baraldo M, Sabatelli P, Castagnaro S, Cescon M, Blaauw B, Bonaldo P. Sustained oral spermidine supplementation rescues functional and structural defects in COL6-deficient myopathic mice. Autophagy 2023; 19:3221-3229. [PMID: 37528588 PMCID: PMC10621270 DOI: 10.1080/15548627.2023.2241125] [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: 08/03/2023] Open
Abstract
COL6 (collagen type VI)-related myopathies (COL6-RM) are a distinct group of inherited muscle disorders caused by mutations of COL6 genes and characterized by early-onset muscle weakness, for which no cure is available yet. Key pathophysiological features of COL6-deficient muscles involve impaired macroautophagy/autophagy, mitochondrial dysfunction, neuromuscular junction fragmentation and myofiber apoptosis. Targeting autophagy by dietary means elicited beneficial effects in both col6a1 null (col6a1-/-) mice and COL6-RM patients. We previously demonstrated that one-month per os administration of the nutraceutical spermidine reactivates autophagy and ameliorates myofiber defects in col6a1-/- mice but does not elicit functional improvement. Here we show that a 100-day-long spermidine regimen is able to rescue muscle strength in col6a1-/- mice, with also a beneficial impact on mitochondria and neuromuscular junction integrity, without any noticeable side effects. Altogether, these data provide a rationale for the application of spermidine in prospective clinical trials for COL6-RM.Abbreviations: AChR: acetylcholine receptor; BTX: bungarotoxin; CNF: centrally nucleated fibers; Colch: colchicine; COL6: collagen type VI; COL6-RM: COL6-related myopathies; MAP1LC3/LC3: microtubule-associated protein 1 light chain 3; NMJ: neuromuscular junction; Spd: spermidine; SQSTM1/p62: sequestosome 1; TA: tibialis anterior; TOMM20: translocase of outer mitochondrial membrane 20; TUNEL: terminal deoxynucleotidyl transferase dUTP-mediated nick-end labeling.
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Affiliation(s)
- Lisa Gambarotto
- Department of Molecular Medicine, University of Padova, Padova, Italy
- Department of Biology, University of Padova, Padova, Italy
| | - Samuele Metti
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Matteo Corpetti
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Martina Baraldo
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Patrizia Sabatelli
- CNR-Institute of Molecular Genetics ”Luigi Luca Cavalli-Sforza”, Unit of Bologna, Bologna, Italy
| | - Silvia Castagnaro
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Matilde Cescon
- Department of Molecular Medicine, University of Padova, Padova, Italy
| | - Bert Blaauw
- Department of Biomedical Sciences, University of Padova, Padova, Italy
- Venetian Institute of Molecular Medicine, Padova, Italy
| | - Paolo Bonaldo
- Department of Molecular Medicine, University of Padova, Padova, Italy
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Su W, Liu Y, Lam A, Hao X, Baudry M, Bi X. Contextual fear memory impairment in Angelman syndrome model mice is associated with altered transcriptional responses. Sci Rep 2023; 13:18647. [PMID: 37903805 PMCID: PMC10616231 DOI: 10.1038/s41598-023-45769-x] [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: 03/28/2023] [Accepted: 10/24/2023] [Indexed: 11/01/2023] Open
Abstract
Angelman syndrome (AS) is a rare neurogenetic disorder caused by UBE3A deficiency and characterized by severe developmental delay, cognitive impairment, and motor dysfunction. In the present study, we performed RNA-seq on hippocampal samples from both wildtype (WT) and AS male mice, with or without contextual fear memory recall. There were 281 recall-associated differentially expressed genes (DEGs) in WT mice and 268 DEGs in AS mice, with 129 shared by the two genotypes. Gene ontology analysis showed that extracellular matrix and stimulation-induced response genes were prominently enriched in recall-associated DEGs in WT mice, while nuclear acid metabolism and tissue development genes were highly enriched in those from AS mice. Further analyses showed that the 129 shared DEGs belonged to nuclear acid metabolism and tissue development genes. Unique recall DEGs in WT mice were enriched in biological processes critical for synaptic plasticity and learning and memory, including the extracellular matrix network clustered around fibronectin 1 and collagens. In contrast, AS-specific DEGs were not enriched in any known pathways. These results suggest that memory recall in AS mice, while altering the transcriptome, fails to recruit memory-associated transcriptional programs, which could be responsible for the memory impairment in AS mice.
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Affiliation(s)
- Wenyue Su
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA, 91766, USA
| | - Yan Liu
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA, 91766, USA
| | - Aileen Lam
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, 701 E. 2nd St., Pomona, CA, 91766-1854, USA
| | - Xiaoning Hao
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, 701 E. 2nd St., Pomona, CA, 91766-1854, USA
| | - Michel Baudry
- College of Dental Medicine, Western University of Health Sciences, Pomona, CA, 91766, USA
| | - Xiaoning Bi
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, 701 E. 2nd St., Pomona, CA, 91766-1854, USA.
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Cescon M, Rampazzo E, Bresolin S, Da Ros F, Manfreda L, Cani A, Della Puppa A, Braghetta P, Bonaldo P, Persano L. Collagen VI sustains cell stemness and chemotherapy resistance in glioblastoma. Cell Mol Life Sci 2023; 80:233. [PMID: 37505240 PMCID: PMC10382393 DOI: 10.1007/s00018-023-04887-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/11/2023] [Accepted: 07/18/2023] [Indexed: 07/29/2023]
Abstract
Microenvironmental factors are known fundamental regulators of the phenotype and aggressiveness of glioblastoma (GBM), the most lethal brain tumor, characterized by fast progression and marked resistance to treatments. In this context, the extracellular matrix (ECM) is known to heavily influence the behavior of cancer cells from several origins, contributing to stem cell niches, influencing tumor invasiveness and response to chemotherapy, mediating survival signaling cascades, and modulating inflammatory cell recruitment. Here, we show that collagen VI (COL6), an ECM protein widely expressed in both normal and pathological tissues, has a distinctive distribution within the GBM mass, strongly correlated with the most aggressive and phenotypically immature cells. Our data demonstrate that COL6 sustains the stem-like properties of GBM cells and supports the maintenance of an aggressive transcriptional program promoting cancer cell proliferation and survival. In particular, we identified a specific subset of COL6-transcriptionally co-regulated genes, required for the response of cells to replicative stress and DNA damage, supporting the concept that COL6 is an essential stimulus for the activation of GBM cell response and resistance to chemotherapy, through the ATM/ATR axis. Altogether, these findings indicate that COL6 plays a pivotal role in GBM tumor biology, exerting a pleiotropic action across different GBM hallmarks, including phenotypic identity and gene transcription, as well as response to treatments, thus providing valuable information for the understanding of the complex microenvironmental cues underlying GBM malignancy.
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Affiliation(s)
- Matilde Cescon
- Department of Molecular Medicine, University of Padova, Via Ugo Bassi 58/B, 35131, Padua, Italy
| | - Elena Rampazzo
- Department of Women and Children's Health, University of Padova, Via Giustiniani 3, 35127, Padua, Italy
- Istituto di Ricerca Pediatrica-Città della Speranza, Corso Stati Uniti 4, 35128, Padua, Italy
| | - Silvia Bresolin
- Department of Women and Children's Health, University of Padova, Via Giustiniani 3, 35127, Padua, Italy
- Istituto di Ricerca Pediatrica-Città della Speranza, Corso Stati Uniti 4, 35128, Padua, Italy
| | - Francesco Da Ros
- Department of Molecular Medicine, University of Padova, Via Ugo Bassi 58/B, 35131, Padua, Italy
| | - Lorenzo Manfreda
- Department of Women and Children's Health, University of Padova, Via Giustiniani 3, 35127, Padua, Italy
- Istituto di Ricerca Pediatrica-Città della Speranza, Corso Stati Uniti 4, 35128, Padua, Italy
| | - Alice Cani
- Department of Women and Children's Health, University of Padova, Via Giustiniani 3, 35127, Padua, Italy
- Istituto di Ricerca Pediatrica-Città della Speranza, Corso Stati Uniti 4, 35128, Padua, Italy
| | - Alessandro Della Puppa
- Department of Neuroscience, Psychology, Pharmacology and Child Health, Neurosurgery Clinic, Academic Neurosurgery, Careggi University Hospital and University of Florence, Largo Palagi 1, 50139, Florence, Italy
| | - Paola Braghetta
- Department of Molecular Medicine, University of Padova, Via Ugo Bassi 58/B, 35131, Padua, Italy
| | - Paolo Bonaldo
- Department of Molecular Medicine, University of Padova, Via Ugo Bassi 58/B, 35131, Padua, Italy
| | - Luca Persano
- Department of Women and Children's Health, University of Padova, Via Giustiniani 3, 35127, Padua, Italy.
- Istituto di Ricerca Pediatrica-Città della Speranza, Corso Stati Uniti 4, 35128, Padua, Italy.
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Navarro-Lérida I, Aragay AM, Asensio A, Ribas C. Gq Signaling in Autophagy Control: Between Chemical and Mechanical Cues. Antioxidants (Basel) 2022; 11:1599. [PMID: 36009317 PMCID: PMC9405508 DOI: 10.3390/antiox11081599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 08/14/2022] [Accepted: 08/15/2022] [Indexed: 11/17/2022] Open
Abstract
All processes in human physiology relies on homeostatic mechanisms which require the activation of specific control circuits to adapt the changes imposed by external stimuli. One of the critical modulators of homeostatic balance is autophagy, a catabolic process that is responsible of the destruction of long-lived proteins and organelles through a lysosome degradative pathway. Identification of the mechanism underlying autophagic flux is considered of great importance as both protective and detrimental functions are linked with deregulated autophagy. At the mechanistic and regulatory levels, autophagy is activated in response to diverse stress conditions (food deprivation, hyperthermia and hypoxia), even a novel perspective highlight the potential role of physical forces in autophagy modulation. To understand the crosstalk between all these controlling mechanisms could give us new clues about the specific contribution of autophagy in a wide range of diseases including vascular disorders, inflammation and cancer. Of note, any homeostatic control critically depends in at least two additional and poorly studied interdependent components: a receptor and its downstream effectors. Addressing the selective receptors involved in autophagy regulation is an open question and represents a new area of research in this field. G-protein coupled receptors (GPCRs) represent one of the largest and druggable targets membrane receptor protein superfamily. By exerting their action through G proteins, GPCRs play fundamental roles in the control of cellular homeostasis. Novel studies have shown Gαq, a subunit of heterotrimeric G proteins, as a core modulator of mTORC1 and autophagy, suggesting a fundamental contribution of Gαq-coupled GPCRs mechanisms in the control of this homeostatic feedback loop. To address how GPCR-G proteins machinery integrates the response to different stresses including oxidative conditions and mechanical stimuli, could provide deeper insight into new signaling pathways and open potential and novel therapeutic strategies in the modulation of different pathological conditions.
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Affiliation(s)
- Inmaculada Navarro-Lérida
- Molecular Biology Department and Center of Molecular Biology “Severo Ochoa”, CSIC-UAM, 28049 Madrid, Spain
- Health Research Institute “La Princesa”, 28006 Madrid, Spain
- Center for Biomedical Research in Cardiovascular Diseases Network (CIBERCV), ISCIII, 28029 Madrid, Spain
- Connexion Cancer-CSIC, 28006 Madrid, Spain
| | - Anna M. Aragay
- Department of Biology, Molecular Biology Institute of Barcelona (IBMB), Spanish National Research Council (CSIC), 08028 Barcelona, Spain
| | - Alejandro Asensio
- Molecular Biology Department and Center of Molecular Biology “Severo Ochoa”, CSIC-UAM, 28049 Madrid, Spain
- Health Research Institute “La Princesa”, 28006 Madrid, Spain
- Center for Biomedical Research in Cardiovascular Diseases Network (CIBERCV), ISCIII, 28029 Madrid, Spain
- Connexion Cancer-CSIC, 28006 Madrid, Spain
| | - Catalina Ribas
- Molecular Biology Department and Center of Molecular Biology “Severo Ochoa”, CSIC-UAM, 28049 Madrid, Spain
- Health Research Institute “La Princesa”, 28006 Madrid, Spain
- Center for Biomedical Research in Cardiovascular Diseases Network (CIBERCV), ISCIII, 28029 Madrid, Spain
- Connexion Cancer-CSIC, 28006 Madrid, Spain
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Gu X, Zhang L, Sun W, Liu K, Xu H, Wu P, Gui M, Qu W. Autophagy Promotes α-Amanitin-Induced Apoptosis of Hepa1-6 Liver Cells. Chem Res Toxicol 2022; 35:392-401. [PMID: 35175747 DOI: 10.1021/acs.chemrestox.1c00297] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
It is estimated that 90% of deaths from food poisoning in China can be attributed to Amanita poisoning, whose main toxin is α-amanitin. Studies showed that apoptosis plays a critical role in liver injuries induced by α-amanitin. Although the relationship between autophagy and apoptosis in different liver models has been addressed many times, whether autophagy plays a pro or con effect on α-amanitin-induced apoptosis has not been clarified. Therefore, this study was conducted to explore the effect of autophagy in α-amanitin-induced apoptosis in Hepa1-6 liver cells. A 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide (MTT) assay was applied to determine cell viability, a 2',7'-dichlorofluorescin diacetate probe was used to monitor reactive oxygen species (ROS) levels, a flow cytometer and dansylcadaverine (MDC) staining were used to observe α-amanitin-induced apoptosis and autophagy, respectively, and apoptosis and autophagy proteins were assessed by western blotting. The results showed that α-amanitin suppressed cell viability in a time- and concentration-dependent manner. Moreover, the release of ROS was increased with increasing α-amanitin amount. Cell apoptosis and autophagy were noticed and characterized by the increased apoptosis rate and autophagic vesicles under a fluorescence microscope as well as upregulation of Bax/Bcl-2, cleaved caspase-3, and LC3-II/I and downregulation of p62. Further, the autophagy activator rapamycin (Rap) and the inhibitor 3-methylademine (3-MA) were introduced, which showed that the apoptosis rate and the ratio of Bax/Bcl-2 as well as the protein expression level of cleaved caspase-3 increased significantly with the pretreatment of Rap and decreased remarkably with the pretreatment of 3-MA. Moreover, cell viability was found to decrease further with the promotion of autophagy. Notably, the ROS level was attenuated after autophagy was elevated. In conclusion, autophagy could promote α-amanitin-induced Hepa1-6 cell apoptosis, and the process is unassociated with ROS levels. This research provides a theoretical basis for the study of the toxicological mechanism of α-amanitin-induced liver injuries.
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Affiliation(s)
- Xiaolong Gu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Yunnan Agricultural University, No. 65, Jin Hei Road, Panlong District, Kunming 650051, P. R. China
| | - Limei Zhang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Yunnan Agricultural University, No. 65, Jin Hei Road, Panlong District, Kunming 650051, P. R. China
| | - Weixing Sun
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Yunnan Agricultural University, No. 65, Jin Hei Road, Panlong District, Kunming 650051, P. R. China
| | - Kai Liu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Yunnan Agricultural University, No. 65, Jin Hei Road, Panlong District, Kunming 650051, P. R. China
| | - Hui Xu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Yunnan Agricultural University, No. 65, Jin Hei Road, Panlong District, Kunming 650051, P. R. China
| | - Peng Wu
- Yunnan Plateau Characteristic Agricultural Industry Research Institute, Yunnan Agricultural University, Kunming 650201, Yunnan, P. R. China
| | - Mingying Gui
- Yunnan Plateau Characteristic Agricultural Industry Research Institute, Yunnan Agricultural University, Kunming 650201, Yunnan, P. R. China
| | - Weijie Qu
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Yunnan Agricultural University, No. 65, Jin Hei Road, Panlong District, Kunming 650051, P. R. China
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Qiao H, Feng Y, Tang H. COL6A6 inhibits the proliferation and metastasis of non-small cell lung cancer through the JAK signalling pathway. Transl Cancer Res 2022; 10:4514-4522. [PMID: 35116307 PMCID: PMC8798920 DOI: 10.21037/tcr-21-2002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Accepted: 10/16/2021] [Indexed: 12/19/2022]
Abstract
Background Collagen type VI alpha 6 chain (COL6A6) plays a vital role in maintaining cell structural integrity and regulating cell function. It has been proven to be a tumor suppressor gene and molecular therapeutic target. However, the mechanism of COL6A6 in non-small cell lung cancer (NSCLC) has not been elucidated. The purpose of this study was to investigate the relationship between COL6A6 and NSCLC. Methods We analyzed the expression of COL6A6 in NSCLC using public databases and verified the findings in NSCLC tissues and cells. The protein expression of COL6A6 was evaluated by Western blot. The CCK8 and Transwell assays were used to assess the invasion ability of NSCLC cells after COL6A6 knockdown. At the same time, we discussed the role of the JAK signalling pathway that may be related to COL6A6. Results Bioinformatics analysis showed that COL6A6 expression was downregulated in NSCLC, and its high expression was associated with a better prognosis of NSCLC. In vitro, the expression of COL6A6 in NSCLC tissues was significantly lower than that in adjacent tissues. Furthermore, COL6A6 knockout accelerated the proliferation, invasion, and migration of NSCLC cells and activated the JAK signalling pathway. Conclusions Our study illustrates that COL6A6 is a tumor suppressor gene in NSCLC and is involved in NSCLC tumorigenesis by regulating the JAK signalling pathway. Therefore, COL6A6 holds promise as a molecular therapeutic target for NSCLC.
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Affiliation(s)
- Han Qiao
- Department of Respiratory Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Yan Feng
- Department of Respiratory Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Huaping Tang
- Department of Respiratory Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
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Neill T, Iozzo RV. The Role of Decorin Proteoglycan in Mitophagy. Cancers (Basel) 2022; 14:804. [PMID: 35159071 PMCID: PMC8834502 DOI: 10.3390/cancers14030804] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Accepted: 02/02/2022] [Indexed: 02/04/2023] Open
Abstract
Proteoglycans are emerging as critical regulators of intracellular catabolism. This rise in prominence has transformed our basic understanding and alerted us to the existence of non-canonical pathways, independent of nutrient deprivation, that potently control the autophagy downstream of a cell surface receptor. As a member of the small leucine-rich proteoglycan gene family, decorin has single-handedly pioneered the connection between extracellular matrix signaling and autophagy regulation. Soluble decorin evokes protracted endothelial cell autophagy via Peg3 and breast carcinoma cell mitophagy via mitostatin by interacting with VEGFR2 or the MET receptor tyrosine kinase, respectively. In this paper, we give a mechanistic perspective of the vital factors underlying the nutrient-independent, SLRP-dependent programs utilized for autophagic and/or mitophagic progression in breast cancer. Future protein therapies based on decorin (or fellow proteoglycan members) will represent a quantum leap forward in transforming autophagic progression into a powerful tool to control intracellular cell catabolism from the outside.
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Affiliation(s)
- Thomas Neill
- Department of Pathology, Anatomy and Cell Biology and the Translational Cellular Oncology Program, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Renato V. Iozzo
- Department of Pathology, Anatomy and Cell Biology and the Translational Cellular Oncology Program, Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA 19107, USA
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11
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Multiple Mechanisms Converging on Transcription Factor EB Activation by the Natural Phenol Pterostilbene. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2021:7658501. [PMID: 34992716 PMCID: PMC8727145 DOI: 10.1155/2021/7658501] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 10/22/2021] [Accepted: 11/17/2021] [Indexed: 11/17/2022]
Abstract
Pterostilbene (Pt) is a potentially beneficial plant phenol. In contrast to many other natural compounds (including the more celebrated resveratrol), Pt concentrations producing significant effects in vitro can also be reached with relative ease in vivo. Here we focus on some of the mechanisms underlying its activity, those involved in the activation of transcription factor EB (TFEB). A set of processes leading to this outcome starts with the generation of ROS, attributed to the interaction of Pt with complex I of the mitochondrial respiratory chain, and spreads to involve Ca2+ mobilization from the ER/mitochondria pool, activation of CREB and AMPK, and inhibition of mTORC1. TFEB migration to the nucleus results in the upregulation of autophagy and lysosomal and mitochondrial biogenesis. Cells exposed to several μM levels of Pt experience a mitochondrial crisis, an indication for using low doses in therapeutic or nutraceutical applications. Pt afforded significant functional improvements in a zebrafish embryo model of ColVI-related myopathy, a pathology which also involves defective autophagy. Furthermore, long-term supplementation with Pt reduced body weight gain and increased transcription levels of Ppargc1a and Tfeb in a mouse model of diet-induced obesity. These in vivo findings strengthen the in vitro observations and highlight the therapeutic potential of this natural compound.
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12
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Nakada M, Wang Y, Ichinose T. The role of collagens in glioma: A narrative review. GLIOMA 2022. [DOI: 10.4103/glioma.glioma_11_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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13
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Abstract
The extracellular matrix (ECM) exists as a dynamic network of biophysical and biochemical factors that maintain tissue homeostasis. Given its sensitivity to changes in the intra- and extracellular space, the plasticity of the ECM can be pathological in driving disease through aberrant matrix remodelling. In particular, cancer uses the matrix for its proliferation, angiogenesis, cellular reprogramming and metastatic spread. An emerging field of matrix biology focuses on proteoglycans that regulate autophagy, an intracellular process that plays both critical and contextual roles in cancer. Here, we review the most prominent autophagic modulators from the matrix and the current understanding of the cellular pathways and signalling cascades that mechanistically drive their autophagic function. We then critically assess how their autophagic functions influence tumorigenesis, emphasizing the complexities and stage-dependent nature of this relationship in cancer. We highlight novel emerging data on immunoglobulin-containing and proline-rich receptor-1, heparanase and thrombospondin 1 in autophagy and cancer. Finally, we further discuss the pro- and anti-autophagic modulators originating from the ECM, as well as how these proteoglycans and other matrix constituents specifically influence cancer progression.
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Affiliation(s)
- Carolyn G. Chen
- Department of Pathology, Anatomy and Cell Biology and the Translational Cellular Oncology Program, Sidney Kimmel Cancer Center, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Renato V. Iozzo
- Department of Pathology, Anatomy and Cell Biology and the Translational Cellular Oncology Program, Sidney Kimmel Cancer Center, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA 19107, USA
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14
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Lamandé SR. Collagen VI Muscle Disorders: Mutation Types, Pathogenic Mechanisms and Approaches to Therapy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1348:311-323. [PMID: 34807426 DOI: 10.1007/978-3-030-80614-9_14] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Mutations in the genes encoding the major collagen VI isoform, COL6A1, COL6A2 and COL6A3, are responsible for the muscle disorders Bethlem myopathy and Ullrich congenital muscular dystrophy. These disorders form a disease spectrum from mild to severe. Dominant and recessive mutations are found along the entire spectrum and the clinical phenotype is strongly influenced by the way mutations impede collagen VI protein assembly. Most mutations are in the triple helical domain, towards the N-terminus and they compromise microfibril assembly. Some mutations are found outside the helix in the C- and N-terminal globular domains, but because these regions are highly polymorphic it is difficult to discriminate mutations from rare benign changes without detailed structural and functional studies. Collagen VI deficiency leads to mitochondrial dysfunction, deficient autophagy and increased apoptosis. Therapies that target these consequences have been tested in mouse models and some have shown modest efficacy in small human trials. Antisense therapies for a common mutation that introduces a pseudoexon show promise in cell culture but haven't yet been tested in an animal model. Future therapeutic approaches await new research into how collagen VI deficiency signals downstream consequences.
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Affiliation(s)
- Shireen R Lamandé
- Murdoch Children's Research Institute and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Parkville, VIC, Australia.
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15
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Williams L, Layton T, Yang N, Feldmann M, Nanchahal J. Collagen VI as a driver and disease biomarker in human fibrosis. FEBS J 2021; 289:3603-3629. [PMID: 34109754 DOI: 10.1111/febs.16039] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/19/2021] [Accepted: 05/27/2021] [Indexed: 12/12/2022]
Abstract
Fibrosis of visceral organs such as the lungs, heart, kidneys and liver remains a major cause of morbidity and mortality and is also associated with many other disorders, including cancer and metabolic disease. In this review, we focus upon the microfibrillar collagen VI, which is present in the extracellular matrix (ECM) of most tissues. However, expression is elevated in numerous fibrotic conditions, such as idiopathic pulmonary disease (IPF), and chronic liver and kidney diseases. Collagen VI is composed of three subunits α1, α2 and α3, which can be replaced with alternate chains of α4, α5 or α6. The C-terminal globular domain (C5) of collagen VI α3 can be proteolytically cleaved to form a biologically active fragment termed endotrophin, which has been shown to actively drive fibrosis, inflammation and insulin resistance. Tissue biopsies have long been considered the gold standard for diagnosis and monitoring of progression of fibrotic disease. The identification of neoantigens from enzymatically processed collagen chains have revolutionised the biomarker field, allowing rapid diagnosis and evaluation of prognosis of numerous fibrotic conditions, as well as providing valuable clinical trial endpoint determinants. Collagen VI chain fragments such as endotrophin (PRO-C6), C6M and C6Mα3 are emerging as important biomarkers for fibrotic conditions.
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Affiliation(s)
- Lynn Williams
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Science, University of Oxford, UK
| | - Thomas Layton
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Science, University of Oxford, UK
| | - Nan Yang
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Science, University of Oxford, UK
| | - Marc Feldmann
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Science, University of Oxford, UK
| | - Jagdeep Nanchahal
- Kennedy Institute of Rheumatology, Nuffield Department of Orthopaedics Rheumatology and Musculoskeletal Science, University of Oxford, UK
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