Shuangqin Chen, Jiemei Li, Ye Liang, Meijia Zhang, Ziqi Qiu, Sirui Liu, HaoRan Wang, Ye Zhu, Shicong Song, Xiaotao Hou, Canzhen Liu, Qinyu Wu, Mingsheng Zhu, Weiwei Shen, Jinhua Miao, Fan Fan Hou, Youhua Liu, Cheng Wang, Lili Zhou
{"title":"β-catenin-inhibited Sumoylation modification of LKB1 and fatty acid metabolism is critical in renal fibrosis.","authors":"Shuangqin Chen, Jiemei Li, Ye Liang, Meijia Zhang, Ziqi Qiu, Sirui Liu, HaoRan Wang, Ye Zhu, Shicong Song, Xiaotao Hou, Canzhen Liu, Qinyu Wu, Mingsheng Zhu, Weiwei Shen, Jinhua Miao, Fan Fan Hou, Youhua Liu, Cheng Wang, Lili Zhou","doi":"10.1038/s41419-024-07154-y","DOIUrl":"10.1038/s41419-024-07154-y","url":null,"abstract":"<p><p>Liver kinase B1 (LKB1) is a serine/threonine kinase controlling cell homeostasis. Among post-translational modification, Sumoylation is vital for LKB1 activating adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK), the key regulator in energy metabolism. Of note, AMPK-regulated fatty acid metabolism is highly involved in maintaining normal renal function. However, the regulative mechanisms of LKB1 Sumoylation remain elusive. In this study, we demonstrated that β-catenin, a notorious signal in renal fibrosis, inhibited the Sumoylation of LKB1, thereby disrupting fatty acid oxidation in renal tubular cells and triggering renal fibrosis. Mechanically, we found that Sumo3 was the key mediator for LKB1 Sumoylation in renal tubular cells, which was transcriptionally inhibited by β-catenin/Transcription factor 4 (TCF4) signaling. Overexpression of Sumo3, not Sumo1 or Sumo2, restored β-catenin-disrupted fatty acid metabolism, and retarded lipid accumulation and fibrogenesis in the kidney. In vivo, conditional knockout of β-catenin in tubular cells effectively preserved fatty acid oxidation and blocked lipid accumulation by maintaining LKB1 Sumoylation and AMPK activation. Furthermore, ectopic expression of Sumo3 strongly inhibited Wnt1-aggravated lipid accumulation and fibrogenesis in unilateral ischemia-reperfusion mice. In patients with chronic kidney disease, we found a loss of Sumo3 expression, and it was highly related to LKB1 repression. This contributes to fatty acid metabolism disruption and lipid accumulation, resulting in renal fibrosis. Overall, our study revealed a new mechanism in fatty acid metabolism dysfunction and provided a new therapeutic target pathway for regulating Sumo modification in renal fibrosis.</p>","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11496881/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142495895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"MAT1A activation of glycolysis to promote NSCLC progression depends on stabilizing CCND1.","authors":"Shengping Shen, Ruili Liu, Jiazheng Huang, Yingjia Sun, Qiang Tan, Qingquan Luo, Ruijun Liu","doi":"10.1038/s41419-024-07113-7","DOIUrl":"10.1038/s41419-024-07113-7","url":null,"abstract":"<p><p>Non-small cell lung cancer (NSCLC) remains a cause for concern as the leading cause of cancer-related death worldwide. Amidst ongoing debates on the role and mechanisms of methionine adenosyltransferase 1A (MAT1A) in cancer, our study sheds light on its significance in NSCLC. Leveraging TCGA database and immunohistochemical staining, we systematically analyzed MAT1A expression in NSCLC, uncovering its marked upregulation. To unravel the functional and mechanistic underpinnings, we implemented stable knockdown of MAT1A in NSCLC cell lines. Our findings converged to demonstrate that suppression of MAT1A expression effectively impeded the proliferation and migratory capabilities of NSCLC cells, while concurrently enhancing apoptosis. Mechanistically, we discovered that MAT1A depletion accelerated the degradation of CCND1, a key cell cycle regulator, through S-phase kinase-associated protein 2 (SKP2)-mediated ubiquitination. Notably, CCND1 emerged as a crucial MAT1A partner, jointly orchestrating glycolytic metabolism in NSCLC cells. This intricate interplay suggests that MAT1A promotes NSCLC progression by safeguarding CCND1 protein stability and activating glycolytic pathways, thereby sustaining tumorigenesis. In summary, our study not only identifies MAT1A as a prognostic marker for poor survival in NSCLC patients but also elucidates its mechanistic contributions to cancer progression. These findings pave the way for the development of targeted therapies aimed at disrupting the deleterious MAT1A-CCND1-glycolysis axis in NSCLC.</p>","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11496809/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142495887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Identification of KW-2449 as a dual inhibitor of ferroptosis and necroptosis reveals that autophagy is a targetable pathway for necroptosis inhibitors to prevent ferroptosis.","authors":"Yaxing Zhao, Qingsong Wang, Jing Zhu, Jin Cai, Xiaona Feng, Qianqian Song, Hui Jiang, Wenqing Ren, Yuan He, Ping Wang, Du Feng, Jianqiang Yu, Yue Liu, Qihui Wu, Jitkaew Siriporn, Zhenyu Cai","doi":"10.1038/s41419-024-07157-9","DOIUrl":"10.1038/s41419-024-07157-9","url":null,"abstract":"<p><p>Necroptosis and ferroptosis are two distinct forms of necrotic-like cell death in terms of their morphological features and regulatory mechanisms. These two types of cell death can coexist in disease and contribute to pathological processes. Inhibition of both necroptosis and ferroptosis has been shown to enhance therapeutic effects in treating complex necrosis-related diseases. However, targeting both necroptosis and ferroptosis by a single compound can be challenging, as these two forms of cell death involve distinct molecular pathways. In this study, we discovered that KW-2449, a previously described necroptosis inhibitor, also prevented ferroptosis both in vitro and in vivo. Mechanistically, KW-2449 inhibited ferroptosis by targeting the autophagy pathway. We further identified that KW-2449 functioned as a ULK1 (Unc-51-like kinase 1) inhibitor to block ULK1 kinase activity in autophagy. Remarkably, we found that Necrostatin-1, a classic necroptosis inhibitor that has been shown to prevent ferroptosis, also targets the autophagy pathway to suppress ferroptosis. This study provides the first understanding of how necroptosis inhibitors can prevent ferroptosis and suggests that autophagy is a targetable pathway for necroptosis inhibitors to prevent ferroptosis. Therefore, the identification and design of pharmaceutical molecules that target the autophagy pathway from necroptosis inhibitors is a promising strategy to develop dual inhibitors of necroptosis and ferroptosis in clinical application.</p>","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493980/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ilenia Masi, Flavia Ottavi, Danila Del Rio, Valentina Caprara, Cristina Vastarelli, Sara Maria Giannitelli, Giulia Fianco, Pamela Mozetic, Marianna Buttarelli, Gabriella Ferrandina, Giovanni Scambia, Daniela Gallo, Alberto Rainer, Anna Bagnato, Francesca Spadaro, Laura Rosanò
{"title":"Author Correction: The interaction of β-arrestin1 with talin1 driven by endothelin A receptor as a feature of α5β1 integrin activation in high-grade serous ovarian cancer.","authors":"Ilenia Masi, Flavia Ottavi, Danila Del Rio, Valentina Caprara, Cristina Vastarelli, Sara Maria Giannitelli, Giulia Fianco, Pamela Mozetic, Marianna Buttarelli, Gabriella Ferrandina, Giovanni Scambia, Daniela Gallo, Alberto Rainer, Anna Bagnato, Francesca Spadaro, Laura Rosanò","doi":"10.1038/s41419-024-07139-x","DOIUrl":"10.1038/s41419-024-07139-x","url":null,"abstract":"","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11494167/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Oncogenic GALNT5 confers FOLFIRINOX resistance via activating the MYH9/ NOTCH/ DDR axis in pancreatic ductal adenocarcinoma.","authors":"Qinyuan Jia, Yuheng Zhu, Hongfei Yao, Yifan Yin, Zonghao Duan, Jiahao Zheng, Ding Ma, Minwei Yang, Jianyu Yang, Junfeng Zhang, Dejun Liu, Rong Hua, Yanmiao Huo, Xueliang Fu, Yongwei Sun, Wei Liu","doi":"10.1038/s41419-024-07110-w","DOIUrl":"10.1038/s41419-024-07110-w","url":null,"abstract":"<p><p>Chemotherapy resistance has been a great challenge in pancreatic ductal adenocarcinoma(PDAC) treatments. Current first-line chemotherapy regimens for PDAC include gemcitabine-based regimens such as AG regimen (albumin paclitaxel and gemcitabine), fluorouracil-based regiments such as FOLFIRINOX regimen ((5-fluorouracil5-FU), oxaliplatin, Irinotecan) and platinum-based regimens for patients with BRCA mutations. large amounts of work have been done on exploring the mechanism underlying resistance of gemcitabine-based and platinum-based regimens, while little research has been achieved on the mechanism of FOLFIRINOX regimens resistance. Hence, we identified Polypeptide N-Acetylgalactosaminyltransferase 5, (GALNT5) as a vital regulator and a potential therapeutic target in FOLFIRINOX regimens resistance. Colony formation assays and flow cytometry assays were performed to explore the roles of GALNT5 in cell proliferation and apoptosis in PDAC treated with FOLFIRINOX. IC50 alterations were calculated in GALNT5 knockdown and overexpressed cell lines. RNA-seq followed by GSEA (gene set enrichment analysis) was displayed to explore the potential mechanism. WB (western blotting), real-time PCR, and IF (immunofluorescence) were performed to validate relative pathways. The mouse orthotopic xenograft PDAC model was established to examine GALNT5 functions in vivo. GALNT5 was highly expressed in PDAC tissues and predicted poor prognosis in PDAC. Upregulation of GALNT5 in PDAC cells conferred FOLFIRINOX resistance on PDAC by inhibiting DNA damage. Moreover, GALNT5 interacted with MYH9, thus participating in the activation of the NOTCH pathways, resulting in hampering FOI-induced DNA damage. Functions of GALNT5 promoting FOLFIRINOX resistance were validated in vivo. In this study, we found that aberrantly overexpressed GALNT5 in PDAC took part in the activation of the NOTCH pathway by interacting with MYH9, thus inhibiting the DDR to achieve FOLFIRINOX resistance and causing poor prognosis. We identified GALNT5 as a potential therapeutic target for PDAC patients resistant to FOLFIRINOX chemotherapy.</p>","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11493973/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Author Correction: Advances in research on immunocyte iron metabolism, ferroptosis, and their regulatory roles in autoimmune and autoinflammatory diseases.","authors":"Liuting Zeng, Kailin Yang, Ganpeng Yu, Wensa Hao, Xiaofei Zhu, Anqi Ge, Junpeng Chen, Lingyun Sun","doi":"10.1038/s41419-024-07112-8","DOIUrl":"10.1038/s41419-024-07112-8","url":null,"abstract":"","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11494185/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zheng-Cai Wang, Yan-Yan Hu, Xiao Z Shen, Wei-Qiang Tan
{"title":"Absence of Langerhans cells resulted in over-influx of neutrophils and increased bacterial burden in skin wounds.","authors":"Zheng-Cai Wang, Yan-Yan Hu, Xiao Z Shen, Wei-Qiang Tan","doi":"10.1038/s41419-024-07143-1","DOIUrl":"https://doi.org/10.1038/s41419-024-07143-1","url":null,"abstract":"<p><p>Langerhans cells (LCs) are resident dendritic cells in the epidermis and their roles in presenting antigens derived from microorganisms present in the skin has been well appreciated. However, it is generally thought that incoming neutrophils are mainly responsible for eradicating invading pathogens in the early stage of wounds and a role of LCs in innate immunity is elusive. In the current study, we showed that wounds absent of LCs had a delayed closure. Mechanistically, LCs were the primary cells in warding off bacteria invasion at the early stage of wound healing. Without LCs, commensal bacteria quickly invaded and propagated in the wounded area. keratinocytes surrounding the wounds responded to the excessive bacteria by elevated production of CXCL5, resulting in an over-influx of neutrophils. The over-presence of activated neutrophils, possibly together with the aggravated invasion of bacteria, was detrimental to epidermal progenitor cell propagation and re-epithelialization. These observations underscore an indispensable role of LCs as effective guardians that preclude both bacteria invasion and damages inflicted by secondary inflammation.</p>","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11489468/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"O-GlcNAcylation inhibition redirects the response of colon cancer cells to chemotherapy from senescence to apoptosis.","authors":"Ingrid Loison, Adrien Pioger, Sonia Paget, Inès Metatla, Audrey Vincent, Corinne Abbadie, Vanessa Dehennaut","doi":"10.1038/s41419-024-07131-5","DOIUrl":"10.1038/s41419-024-07131-5","url":null,"abstract":"<p><p>The potential use of pro-senescence therapies, known as TIS (Therapy-Induced Senescence), for the treatment of colorectal cancer (CRC) generated significant interest since they require lower doses compared to those required for inducing apoptosis. However, the senescent cell cycle-arrested cancer cells are long-lived, and studies have revealed escape mechanisms contributing to tumor recurrence. To deepen our understanding of the survival pathways used by senescent cancer cells, we delved into the potential involvement of the hexosamine biosynthetic pathway (HBP). HBP provides UDP-GlcNAc, the substrate for O-GlcNAc transferase (OGT), which catalyzes O-GlcNAcylation, a post-translational modification implicated in regulating numerous cellular functions and aberrantly elevated in CRC. In this study, we demonstrated, in the p53-proficient colon cancer cell lines HCT116 and LS174T, that TIS induced by low-dose SN38 or etoposide treatment was accompanied with a decrease of GFAT (the rate limiting enzyme of the HBP), OGT and O-GlcNAcase (OGA) expression correlated with a slight reduction in O-GlcNAcylation levels. Further decreasing this level of O-GlcNAcylation by knocking-down GFAT or OGT redirected the cellular response to subtoxic chemotherapy doses from senescence to apoptosis, in correlation with an enhancement of DNA damages. Pharmacological inhibition of OGT with OSMI-4 in HCT116 and LS174T cells and in a patient-derived colon tumoroid model supported these findings. Taken together, these results suggest that combing O-GlcNAcylation inhibitors to low doses of conventional chemotherapeutic drugs could potentially reduce treatment side effects while preserving efficacy. Furthermore, this approach may increase treatment specificity, as CRC cells exhibit higher O-GlcNAcylation levels compared to normal tissues.</p>","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11490504/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bing Wang, Haomeng Kou, Yuwen Wang, Qi Zhang, Duo Jiang, Juan Wang, Ziqin Zhao, Yao Zhou, Miaomiao Zhang, Lei Sui, Mingfeng Zhao, Yancheng Liu, Yang Liu, Lei Shi, Feng Wang
{"title":"LAP2α orchestrates alternative lengthening of telomeres suppression through telomeric heterochromatin regulation with HDAC1: unveiling a potential therapeutic target.","authors":"Bing Wang, Haomeng Kou, Yuwen Wang, Qi Zhang, Duo Jiang, Juan Wang, Ziqin Zhao, Yao Zhou, Miaomiao Zhang, Lei Sui, Mingfeng Zhao, Yancheng Liu, Yang Liu, Lei Shi, Feng Wang","doi":"10.1038/s41419-024-07116-4","DOIUrl":"10.1038/s41419-024-07116-4","url":null,"abstract":"<p><p>In response to the challenge of telomere attrition during DNA replication, cancer cells predominantly employ telomerase or, in 10-15% of cases, the alternative lengthening of telomeres (ALT). The intricate details of ALT, however, remain elusive. In this study, we unveil that the knockdown of lamina-associated polypeptide 2 alpha (LAP2α) in ALT cells results in telomere dysfunction, triggering a notable increase in ALT-associated hallmarks, including high frequencies of PML bodies (APBs), C-rich extrachromosomal circles (C-circles), and telomere sister chromatid exchange (T-SCE). Furthermore, LAP2α emerges as a crucial player in break-induced telomere replication for telomerase-positive cells following telomeric double-strand breaks. Mechanistically, our investigation suggests that LAP2α may influence the regulation of the heterochromatic state of telomeres, thereby affecting telomeric accessibility. In line with our findings, LAP2α expression is markedly reduced in ALT-positive osteosarcoma. And the use of methotrexate (MTX) can restore the heterochromatin state altered by LAP2α depletion. This is evidenced by a significant inhibition of tumor proliferation in ALT-positive patient-derived xenograft (PDX) mouse models. These results indicate the important role of LAP2α in regulating ALT activity and offer insights into the interplay between lamina-associated proteins and telomeres in maintaining telomere length. Importantly, our findings may help identify a more appropriate target population for the osteosarcoma therapeutic drug, MTX.</p>","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11490576/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Retinal pigment epithelium-specific ablation of GPx4 in adult mice recapitulates key features of geographic atrophy in age-related macular degeneration.","authors":"Kunihiro Azuma, Takafumi Suzuki, Kenta Kobayashi, Masako Nagahara, Hirotaka Imai, Akiko Suga, Takeshi Iwata, Tomoyasu Shiraya, Makoto Aihara, Takashi Ueta","doi":"10.1038/s41419-024-07150-2","DOIUrl":"10.1038/s41419-024-07150-2","url":null,"abstract":"<p><p>Age-related macular degeneration (AMD) is a leading cause of irreversible vision loss in the elderly population, particularly the late-stage of dry AMD known as geographic atrophy (GA), lacks effective treatment options. Genetic mouse models of AMD have revealed the significance of impaired lipid metabolism and anti-oxidative capacity in early/intermediate stage of AMD, but remains unclear in GA that severely damages visual function. Here, to investigate the potential relevance of peroxidized lipids in RPE for late-stage dry AMD, GPx4<sup>fl/fl</sup> mice underwent subretinal injections of RPE-specific AAV-Cre vector or control AAV vector. RPE-specific GPx4 deficiency led to rapid RPE degeneration resembling key features of late-stage dry AMD, including preceding loss of RPE cell polarity, accumulation of acrolein, malondialdehyde, and 4-hydroxynonenal, photoreceptor loss, lipofuscin-laden subretinal melanophage infiltration, and complement activation. Treatment with α-tocopherol and ferrostatin-1 mitigated RPE degeneration, and shrunk mitochondria were observed in GPx4 deficient mice, suggesting involvement of ferroptosis. Unexpectedly, necrostatin-1s, an inhibitor of necroptosis, also ameliorated RPE degeneration, and activation of RIP3 and MLKL along with inactivation of caspase-8 was observed, indicating crosstalk between ferroptosis and necroptosis pathways. Our findings shed light on the intricate mechanisms underlying RPE degeneration in AMD and highlight GPx4/lipid peroxidation as potential therapeutic targets. RPE-specific ablation of GPx4 in mice provides a valuable tool for further elucidating the interplay between lipid peroxidation, cell death pathways, and AMD pathogenesis, offering new insights for preclinical research and therapeutic development targeting GA.</p>","PeriodicalId":9734,"journal":{"name":"Cell Death & Disease","volume":null,"pages":null},"PeriodicalIF":8.1,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11490617/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142458989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}