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He H, He M, Wang Y, Xiong H, Xiong Y, Shan M, Liu D, Guo Z, Kou Y, Zhang Y, Yang M, Lian J, Sun L, He F. Berberine increases the killing effect of pirarubicin on HCC cells by inhibiting ATG4B-autophagy pathway. Exp Cell Res 2024; 439:114094. [PMID: 38750718 DOI: 10.1016/j.yexcr.2024.114094] [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: 10/17/2023] [Revised: 04/17/2024] [Accepted: 05/12/2024] [Indexed: 05/26/2024]
Abstract
Pirarubicin (THP) is a new generation of cell cycle non-specific anthracycline-based anticancer drug. In the clinic, THP and THP combination therapies have been shown to be effective in hepatocellular carcinoma (HCC) patients with transcatheter arterial chemoembolization (TACE) without serious side effects. However, drug resistance limits its therapeutic efficacy. Berberine (BBR), an isoquinoline alkaloid, has been shown to possess antitumour properties against various malignancies. However, the synergistic effect of BBR and THP in the treatment of HCC is unknown. In the present study, we demonstrated for the first time that BBR sensitized HCC cells to THP, including enhancing THP-induced growth inhibition and apoptosis of HCC cells. Moreover, we found that BBR sensitized THP by reducing the expression of autophagy-related 4B (ATG4B). Mechanistically, the inhibition of HIF1α-mediated ATG4B transcription by BBR ultimately led to attenuation of THP-induced cytoprotective autophagy, accompanied by enhanced growth inhibition and apoptosis in THP-treated HCC cells. Tumor-bearing experiments in nude mice showed that the combination treatment with BBR and THP significantly suppressed the growth of HCC xenografts. These results reveal that BBR is able to strengthen the killing effect of THP on HCC cells by repressing the ATG4B-autophagy pathway, which may provide novel insights into the improvement of chemotherapeutic efficacy of THP, and may be conducive to the further clinical application of THP in HCC treatment.
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Affiliation(s)
- Haiyan He
- Department of Biochemistry and Molecular Biology, Army Medical University, Chongqing, 400038, China; Department of Laboratory Medicine, Southwest Hospital, Army Medical University, Chongqing, 400038, China
| | - Meng He
- Department of Biochemistry and Molecular Biology, Army Medical University, Chongqing, 400038, China
| | - Yunxia Wang
- Department of Laboratory Medicine, Southwest Hospital, Army Medical University, Chongqing, 400038, China
| | - Haojun Xiong
- Key Laboratory of Hepatobiliary and Pancreatic Surgery, Institute of Hepatobiliary Surgery, Southwest Hospital, Army Medical University, Chongqing, 400038, China
| | - Yu Xiong
- Department of Laboratory Medicine, Southwest Hospital, Army Medical University, Chongqing, 400038, China
| | - Meihua Shan
- Department of Clinical Biochemistry, Army Medical University, Chongqing, 400038, China
| | - Dong Liu
- Department of Clinical Biochemistry, Army Medical University, Chongqing, 400038, China
| | - Ziyuan Guo
- Department of Clinical Biochemistry, Army Medical University, Chongqing, 400038, China
| | - Yuhong Kou
- Department of Clinical Biochemistry, Army Medical University, Chongqing, 400038, China
| | - Yan Zhang
- Department of Biochemistry and Molecular Biology, Army Medical University, Chongqing, 400038, China
| | - Mingzhen Yang
- Department of Clinical Biochemistry, Army Medical University, Chongqing, 400038, China
| | - Jiqin Lian
- Department of Clinical Biochemistry, Army Medical University, Chongqing, 400038, China.
| | - Liangbo Sun
- Department of Clinical Biochemistry, Army Medical University, Chongqing, 400038, China.
| | - Fengtian He
- Department of Biochemistry and Molecular Biology, Army Medical University, Chongqing, 400038, China.
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Gong Z, Zhu J, Chen J, Feng F, Zhang H, Zhang Z, Song C, Liang K, Yang S, Fan S, Fang X, Shen S. CircRREB1 mediates lipid metabolism related senescent phenotypes in chondrocytes through FASN post-translational modifications. Nat Commun 2023; 14:5242. [PMID: 37640697 PMCID: PMC10462713 DOI: 10.1038/s41467-023-40975-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 08/18/2023] [Indexed: 08/31/2023] Open
Abstract
Osteoarthritis is a prevalent age-related disease characterized by dysregulation of extracellular matrix metabolism, lipid metabolism, and upregulation of senescence-associated secretory phenotypes. Herein, we clarify that CircRREB1 is highly expressed in secondary generation chondrocytes and its deficiency can alleviate FASN related senescent phenotypes and osteoarthritis progression. CircRREB1 impedes proteasome-mediated degradation of FASN by inhibiting acetylation-mediated ubiquitination. Meanwhile, CircRREB1 induces RanBP2-mediated SUMOylation of FASN and enhances its protein stability. CircRREB1-FASN axis inhibits FGF18 and FGFR3 mediated PI3K-AKT signal transduction, then increased p21 expression. Intra-articular injection of adenovirus-CircRreb1 reverses the protective effects in CircRreb1 deficiency mice. Further therapeutic interventions could have beneficial effects in identifying CircRREB1 as a potential prognostic and therapeutic target for age-related OA.
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Affiliation(s)
- Zhe Gong
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Jinjin Zhu
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Junxin Chen
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Fan Feng
- Obstetrics and Gynecology Hospital, Kunpeng Road, Hangzhou, 310016, Zhejiang Province, China
| | - Haitao Zhang
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Zheyuan Zhang
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Chenxin Song
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Kaiyu Liang
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Shuhui Yang
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China
| | - Shunwu Fan
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China.
| | - Xiangqian Fang
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China.
| | - Shuying Shen
- Department of Orthopaedic Surgery, Sir Run Run Shaw Hospital, Medical College of Zhejiang University & Key Laboratory of Musculoskeletal System Degeneration and Regeneration Translational Research of Zhejiang Province Sir Run Run Shaw Institute of Clinical Medicine of Zhejiang University, 3 East Qingchun Road, Hangzhou, 310016, Zhejiang Province, China.
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The Impact of Oxidative Stress and AKT Pathway on Cancer Cell Functions and Its Application to Natural Products. Antioxidants (Basel) 2022; 11:antiox11091845. [PMID: 36139919 PMCID: PMC9495789 DOI: 10.3390/antiox11091845] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 09/14/2022] [Accepted: 09/16/2022] [Indexed: 01/10/2023] Open
Abstract
Oxidative stress and AKT serine-threonine kinase (AKT) are responsible for regulating several cell functions of cancer cells. Several natural products modulate both oxidative stress and AKT for anticancer effects. However, the impact of natural product-modulating oxidative stress and AKT on cell functions lacks systemic understanding. Notably, the contribution of regulating cell functions by AKT downstream effectors is not yet well integrated. This review explores the role of oxidative stress and AKT pathway (AKT/AKT effectors) on ten cell functions, including apoptosis, autophagy, endoplasmic reticulum stress, mitochondrial morphogenesis, ferroptosis, necroptosis, DNA damage response, senescence, migration, and cell-cycle progression. The impact of oxidative stress and AKT are connected to these cell functions through cell function mediators. Moreover, the AKT effectors related to cell functions are integrated. Based on this rationale, natural products with the modulating abilities for oxidative stress and AKT pathway exhibit the potential to regulate these cell functions, but some were rarely reported, particularly for AKT effectors. This review sheds light on understanding the roles of oxidative stress and AKT pathway in regulating cell functions, providing future directions for natural products in cancer treatment.
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Zhang Y, Tie Q, Bao Z, Shao Z, Zhang L. Inhibition of miR-15a-5p Promotes the Chemoresistance to Pirarubicin in Hepatocellular Carcinoma via Targeting eIF4E. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2021; 2021:6468405. [PMID: 34812269 PMCID: PMC8605919 DOI: 10.1155/2021/6468405] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 10/25/2021] [Accepted: 10/26/2021] [Indexed: 01/10/2023]
Abstract
Chemoresistance has become a primary hurdle in the therapeutic outcome of hepatocellular carcinoma. Substantial evidences have demonstrated that microRNAs (miRNAs) are closely associated with the chemoresistance of hepatocellular carcinoma (HCC). Our investigation is aimed at testifying the influence of microRNA-15a-5p (miR-15a-5p)/eukaryotic translation initiation factor 4E (eIF4E) on hepatocellular carcinoma resistance to pirarubicin (THP). In our study, miR-15a-5p expression was increased in THP-treated HepG2 cells. Downregulation of miR-15a-5p blocked cell growth and elevated cell apoptosis of HepG2 cells treated with THP. Moreover, eIF4E was verified as a direct target of miR-15a-5p by binding its 3'-UTR, which was confirmed by luciferase report experiment. Additionally, eIF4E was negatively associated with the miR-15a-5p expression in HepG2 cells. Mechanically, eIF4E was proven as a specific downstream of miR-15a-5p and mediated the effects of miR-15a-5p on cell viability and apoptosis of HepG2 cells treated with THP. These findings supported that miR-15a-5p facilitated THP resistance of hepatocellular carcinoma cells by modulating eIF4E, thus providing an experimental basis that miR-15a-5p might act as a novel diagnostic target in hepatocellular carcinoma resistance to THP.
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Affiliation(s)
- Ying Zhang
- Jianhu County People's Hospital, Yancheng, 224700 Jiangsu, China
| | - Qingsong Tie
- Jianhu County People's Hospital, Yancheng, 224700 Jiangsu, China
| | - Zhiwei Bao
- Jianhu County People's Hospital, Yancheng, 224700 Jiangsu, China
| | - Zhi Shao
- Jianhu County People's Hospital, Yancheng, 224700 Jiangsu, China
| | - Lan Zhang
- Jianhu County People's Hospital, Yancheng, 224700 Jiangsu, China
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5
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Zhang L, Guo W, Yu J, Li C, Li M, Chai D, Wang W, Deng W. Receptor-interacting protein in malignant digestive neoplasms. J Cancer 2021; 12:4362-4371. [PMID: 34093836 PMCID: PMC8176420 DOI: 10.7150/jca.57076] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 04/22/2021] [Indexed: 12/24/2022] Open
Abstract
A deep and comprehensive understanding of factors that contribute to cancer initiation, progression, and evolution is of essential importance. Among them, the serine/threonine and tyrosine kinase-like kinases, also known as receptor interacting proteins (RIPs) or receptor interacting protein kinases (RIPKs), is emerging as important tumor-related proteins due to its complex regulation of cell survival, apoptosis, and necrosis. In this review, we mainly review the relevance of RIP to various malignant digestive neoplasms, including esophageal cancer, gastric cancer, colorectal cancer, hepatocellular carcinoma, gallbladder cancer, cholangiocarcinoma, and pancreatic cancer. Consecutive research on RIPs and its relationship with malignant digestive neoplasms is required, as it ultimately conduces to the etiology and treatment of cancer.
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Affiliation(s)
- Lilong Zhang
- Department of General Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, Hubei 430060, China
| | - Wenyi Guo
- Department of General Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, Hubei 430060, China
| | - Jia Yu
- Department of General Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, Hubei 430060, China
| | - Chunlei Li
- Department of General Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, Hubei 430060, China
| | - Man Li
- Department of General Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, Hubei 430060, China
| | - Dongqi Chai
- Department of General Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, Hubei 430060, China
| | - Weixing Wang
- Department of General Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, Hubei 430060, China
| | - Wenhong Deng
- Department of General Surgery, Renmin Hospital of Wuhan University, Jiefang Road 238, Wuhan, Hubei 430060, China
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6
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Yuan R, Huang Y, Chan L, He D, Chen T. Engineering EHD1-Targeted Natural Borneol Nanoemulsion Potentiates Therapeutic Efficacy of Gefitinib against Nonsmall Lung Cancer. ACS APPLIED MATERIALS & INTERFACES 2020; 12:45714-45727. [PMID: 32927941 DOI: 10.1021/acsami.0c08069] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Despite the effective targeting of the epidermal growth factor receptor (EGFR), the use of gefitinib (GFT) for nonsmall cell lung cancer (NSCLC) treatment meets a failure because of the insufficient drug accumulation in the tumor region. Therefore, developing chemosensitizers of GFT with synergistic therapeutic effects is urgently needed for advanced cancer therapy. Herein, a natural chemosensitizer, natural borneol (NB), is reformulated as an oil-in-water nanoemulsion to enhance its solubility, distribution, and to ultimately increase the therapeutic index with GFT. The nanolization of NB (NBNPs) displays stronger targeted delivery and cytotoxicity than NB by selectively identifying eight specific protein targets in A549 NSCLC cells as revealed by the proteomic studies. Consistently, NBNPs realize stronger chemosensitization effects than NB with GFT by effectively regulating EGFR/EHD1-mediated apoptosis in A549 NSCLC cells. Owing to the satisfying synergistic effect between NBNPs and GFT, the combined therapy not only enhances the anticancer ability of GFT against NSCLC proliferation but also avoids heavy double toxicity in vivo. This finding demonstrates the effective synergism between NBNPs and GFT with clear mechanistic investigation and is expected to extend the application of NBNPs as a novel chemosensitizer for advanced cancer chemotherapy.
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MESH Headings
- Animals
- Antineoplastic Agents/chemistry
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Camphanes/chemistry
- Camphanes/pharmacology
- Carcinoma, Non-Small-Cell Lung/drug therapy
- Carcinoma, Non-Small-Cell Lung/metabolism
- Carcinoma, Non-Small-Cell Lung/pathology
- Cell Proliferation/drug effects
- Cells, Cultured
- Drug Screening Assays, Antitumor
- Emulsions/chemistry
- Female
- Gefitinib/chemistry
- Gefitinib/pharmacology
- Humans
- Lung Neoplasms/drug therapy
- Lung Neoplasms/metabolism
- Lung Neoplasms/pathology
- Mice
- Mice, Inbred BALB C
- Mice, Nude
- Molecular Structure
- Nanoparticles/chemistry
- Neoplasms, Experimental/drug therapy
- Neoplasms, Experimental/metabolism
- Neoplasms, Experimental/pathology
- Particle Size
- Surface Properties
- Vesicular Transport Proteins/antagonists & inhibitors
- Vesicular Transport Proteins/metabolism
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Affiliation(s)
- Riming Yuan
- The First Affiliated Hospital, and Department of Chemistry, Jinan University, Guangzhou 510632, China
| | - Yanyu Huang
- The First Affiliated Hospital, and Department of Chemistry, Jinan University, Guangzhou 510632, China
| | - Leung Chan
- The First Affiliated Hospital, and Department of Chemistry, Jinan University, Guangzhou 510632, China
| | - Dihao He
- The First Affiliated Hospital, and Department of Chemistry, Jinan University, Guangzhou 510632, China
| | - Tianfeng Chen
- The First Affiliated Hospital, and Department of Chemistry, Jinan University, Guangzhou 510632, China
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7
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Sun X, Wang T, Huang B, Ruan G, Xu A. RIPK1 regulates the survival of human melanocytes upon endoplasmic reticulum stress. Exp Ther Med 2020; 19:3239-3246. [PMID: 32266019 PMCID: PMC7132262 DOI: 10.3892/etm.2020.8575] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 01/22/2020] [Indexed: 02/06/2023] Open
Abstract
Vitiligo is a common congenital or acquired disfiguring skin disorder. At present, endoplasmic reticulum (ER) stress has been identified to serve a critical role in the pathogenesis of vitiligo. Receptor-interacting serine/threonine-protein kinase 1 (RIPK1) is a protein serine/threonine kinase. The specific molecular mechanism of RIPK1 in human melanocytes upon ER stress remains to be determined. In the present study, RIPK1 was significantly downregulated in tunicamycin (TM)-induced ER stressed-human melanocytes. Subsequently, to explore the role of RIPK1 in ER stress-induced human melanocytes, human melanocytes were transfected with control or RIPK1 plasmids for 24 h and then treated with 3 µM TM for 48 h. Reverse transcription-quantitative PCR and western blot analysis indicated that the expression levels of protein kinase R-like endoplasmic reticulum kinase, eukaryotic translation initiation factor 2 subunit 1 and CCAAT-enhancer-binding protein homologous protein were significantly increased in the TM-treated group compared with the controls. In addition, the effect of high RIPK1 expression on ER stress-induced human melanocyte survival was studied. The present results indicated that TM inhibited cell viability and promoted apoptosis in human primary epidermal melanocytes. Western blot analysis demonstrated that the expression of Bax and caspase-3 was upregulated and the expression of Bcl-2 was downregulated in TM-treated human melanocytes. The effects of TM on human melanocytes were reversed by RIPK1 overexpression. Therefore, RIPK1 overexpression may have an effect on the PI3K/AKT/mTOR signaling pathway in human melanocytes under ER stress. The results of the current study demonstrated that RIPK1 could protect human melanocytes from cell damage induced by ER stress by regulating the PI3K/AKT/mTOR and ER stress signaling pathways, thereby serving a protective role in the occurrence and development of vitiligo.
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Affiliation(s)
- Xuecheng Sun
- Department of Dermatology, The Third People's Hospital of Hangzhou, Hangzhou, Zhejiang 310009, P.R. China
| | - Tao Wang
- Department of Dermatology, The Third People's Hospital of Hangzhou, Hangzhou, Zhejiang 310009, P.R. China
| | - Bo Huang
- Department of Dermatology, The Third People's Hospital of Hangzhou, Hangzhou, Zhejiang 310009, P.R. China
| | - Gaobo Ruan
- Department of Dermatology, The Third People's Hospital of Hangzhou, Hangzhou, Zhejiang 310009, P.R. China
| | - Aie Xu
- Department of Dermatology, The Third People's Hospital of Hangzhou, Hangzhou, Zhejiang 310009, P.R. China
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Montalban-Bravo G, Class CA, Ganan-Gomez I, Kanagal-Shamanna R, Sasaki K, Richard-Carpentier G, Naqvi K, Wei Y, Yang H, Soltysiak KA, Chien K, Bueso-Ramos C, Do KA, Kantarjian H, Garcia-Manero G. Transcriptomic analysis implicates necroptosis in disease progression and prognosis in myelodysplastic syndromes. Leukemia 2020; 34:872-881. [PMID: 31719677 PMCID: PMC7056563 DOI: 10.1038/s41375-019-0623-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 10/17/2019] [Accepted: 11/03/2019] [Indexed: 11/17/2022]
Abstract
Myelodysplastic syndromes (MDS) are characterized by ineffective hematopoiesis and cytopenias due to uncontrolled programmed cell death. The presence of pro-inflammatory cytokines and constitutive activation of innate immunity signals in MDS cells suggest inflammatory cell death, such as necroptosis, may be responsible for disease phenotype. We evaluated 64 bone marrow samples from 55 patients with MDS or chronic myelomonocytic leukemia (CMML) obtained prior to (n = 46) or after (n = 18) therapy with hypomethylating agents (HMAs). RNA from sorted bone marrow CD34+ cells was isolated and subject to amplification and RNA-Seq. Compared with healthy controls, expression levels of MLKL (CMML: 2.09 log2FC, p = 0.0013; MDS: 1.89 log2FC, p = 0.003), but not RIPK1 or RIPK3, were significantly upregulated. Higher expression levels of MLKL were associated with lower hemoglobin levels at diagnosis (-0.19 log2FC per 1 g/dL increase of Hgb, p = 0.03). Significant reduction in MLKL levels was observed after HMA therapy (-1.06 log2FC, p = 0.05) particularly among nonresponders (-2.89 log2FC, p = 0.06). Higher RIPK1 expression was associated with shorter survival (HR 1.92, 95% CI 1.00-3.67, p = 0.049 by Cox proportional hazards). This data provides further support for a role of necroptosis in MDS, and potentially response to HMAs and prognosis. This data also indicate that RIPK1/RIPK3/MLKL are potential therapeutic targets in MDS.
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Affiliation(s)
| | - Caleb A Class
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Irene Ganan-Gomez
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Rashmi Kanagal-Shamanna
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Koji Sasaki
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | | | - Kiran Naqvi
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Yue Wei
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Hui Yang
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Kelly A Soltysiak
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Kelly Chien
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Carlos Bueso-Ramos
- Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Kim-Anh Do
- Department of Biostatistics, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Hagop Kantarjian
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Guillermo Garcia-Manero
- Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
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