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Bellon M, Nicot C. Targeting Pim kinases in hematological cancers: molecular and clinical review. Mol Cancer 2023; 22:18. [PMID: 36694243 DOI: 10.1186/s12943-023-01721-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/13/2023] [Indexed: 01/26/2023] Open
Abstract
Decades of research has recognized a solid role for Pim kinases in lymphoproliferative disorders. Often up-regulated following JAK/STAT and tyrosine kinase receptor signaling, Pim kinases regulate cell proliferation, survival, metabolism, cellular trafficking and signaling. Targeting Pim kinases represents an interesting approach since knock-down of Pim kinases leads to non-fatal phenotypes in vivo suggesting clinical inhibition of Pim may have less side effects. In addition, the ATP binding site offers unique characteristics that can be used for the development of small inhibitors targeting one or all Pim isoforms. This review takes a closer look at Pim kinase expression and involvement in hematopoietic cancers. Current and past clinical trials and in vitro characterization of Pim kinase inhibitors are examined and future directions are discussed. Current studies suggest that Pim kinase inhibition may be most valuable when accompanied by multi-drug targeting therapy.
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Shang G, Han L, Wang Z, Song M, Wang D, Tan Y, Li Y, Li Y, Zhang W, Zhong M. Pim1 knockout alleviates sarcopenia in aging mice via reducing adipogenic differentiation of PDGFRα + mesenchymal progenitors. J Cachexia Sarcopenia Muscle 2021; 12:1741-1756. [PMID: 34435457 PMCID: PMC8718082 DOI: 10.1002/jcsm.12770] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 07/01/2021] [Accepted: 07/10/2021] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Sarcopenia widely exists in elderly people and triggers numerous age-related events. The essential pathologic change lies in the increased intramuscular adipose tissue after aging with no exception to non-obese objects. Pim1 appears to be associated with adipogenic differentiation in recent studies, inspiring us to explore whether it regulates adipogenesis in aging muscles and affects sarcopenia. METHODS Wild-type and Pim1 knockout C57/BL6J mice were randomized into young and old groups. Histo-pathological and molecular biological methods were applied to assess the intramuscular adipose tissue content, the atrophy and regeneration, and the expressions of Pim1 and adipogenic transcription factors. PDGFRα+ mesenchymal progenitors were separated and their replicative aging model were established. Different time of adipogenic induction and different amounts of Pim1 inhibitor were applied, after which the adipogenic potency were evaluated. The expressions of Pim1 and adipogenic transcription factors were measured through western blotting. RESULTS The aging mice demonstrated decreased forelimb grip strength (P = 0.0003), hanging impulse (P < 0.0001), exhaustive running time (P < 0.0001), tetanic force (P = 0.0298), lean mass (P = 0.0008), and percentage of gastrocnemius weight in body weight (P < 0.0001), which were improved by Pim1 knockout (P = 0.0015, P = 0.0222, P < 0.0001, P = 0.0444, P = 0.0004, and P = 0.0003, respectively). To elucidate the mechanisms, analyses showed that Pim1 knockout decreased the fat mass (P = 0.0005) and reduced the intramuscular adipose tissue content (P = 0.0008) by inhibiting the C/EBPδ pathway (P = 0.0067) in aging mice, resulting in increased cross-sectional area of all and fast muscle fibres (P = 0.0017 and 0.0024 respectively), decreased levels of MuRF 1 and atrogin 1 (P = 0.0001 and 0.0329 respectively), and decreased content of Pax7 at the basal state (P = 0.0055). In vitro, senescent PDGFRα+ mesenchymal progenitors showed significantly increased the intracellular adipose tissue content (OD510) compared with young cells after 6 days of adipogenic induction (P < 0.0001). The Pim1 expression was elevated during adipogenic differentiation, and Pim1 inhibition significantly reduced the OD510 in senescent cells (P = 0.0040) by inhibiting the C/EBPδ pathway (P = 0.0047). CONCLUSIONS Pim1 knockout exerted protective effects in sarcopenia by inhibiting the adipogenic differentiation of PDGFRα+ mesenchymal progenitors induced by C/EBPδ activation and thus reducing the intramuscular adipose tissue content in aging mice. These results provide a potential target for the treatment of sarcopenia.
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Affiliation(s)
- Guo‐kai Shang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Lu Han
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
- Department of General Practice, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Zhi‐hao Wang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
- Department of Geriatric Medicine, Qilu Hospital, Cheeloo College of MedicineShandong University; Shandong key Laboratory of Cardiovascular ProteomicsJinanShandongChina
| | - Ming Song
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Di Wang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Yan‐min Tan
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Yi‐hui Li
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
- Department of Critical Care Medicine, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Yu‐lin Li
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Wei Zhang
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
| | - Ming Zhong
- The Key Laboratory of Cardiovascular Remodeling and Function Research, Chinese Ministry of Education, Chinese National Health Commission and Chinese Academy of Medical Sciences, The State and Shandong Province Joint Key Laboratory of Translational Cardiovascular Medicine, Department of Cardiology, Qilu Hospital, Cheeloo College of MedicineShandong UniversityJinanShandongChina
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Ebeid DE, Khalafalla FG, Broughton KM, Monsanto MM, Esquer CY, Sacchi V, Hariharan N, Korski KI, Moshref M, Emathinger J, Cottage CT, Quijada PJ, Nguyen JH, Alvarez R, Völkers M, Konstandin MH, Wang BJ, Firouzi F, Navarrete JM, Gude NA, Goumans MJ, Sussman MA. Pim1 maintains telomere length in mouse cardiomyocytes by inhibiting TGFβ signalling. Cardiovasc Res 2021; 117:201-211. [PMID: 32176281 PMCID: PMC7797214 DOI: 10.1093/cvr/cvaa066] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 03/13/2019] [Indexed: 12/26/2022] Open
Abstract
AIMS Telomere attrition in cardiomyocytes is associated with decreased contractility, cellular senescence, and up-regulation of proapoptotic transcription factors. Pim1 is a cardioprotective kinase that antagonizes the aging phenotype of cardiomyocytes and delays cellular senescence by maintaining telomere length, but the mechanism remains unknown. Another pathway responsible for regulating telomere length is the transforming growth factor beta (TGFβ) signalling pathway where inhibiting TGFβ signalling maintains telomere length. The relationship between Pim1 and TGFβ has not been explored. This study delineates the mechanism of telomere length regulation by the interplay between Pim1 and components of TGFβ signalling pathways in proliferating A549 cells and post-mitotic cardiomyocytes. METHODS AND RESULTS Telomere length was maintained by lentiviral-mediated overexpression of PIM1 and inhibition of TGFβ signalling in A549 cells. Telomere length maintenance was further demonstrated in isolated cardiomyocytes from mice with cardiac-specific overexpression of PIM1 and by pharmacological inhibition of TGFβ signalling. Mechanistically, Pim1 inhibited phosphorylation of Smad2, preventing its translocation into the nucleus and repressing expression of TGFβ pathway genes. CONCLUSION Pim1 maintains telomere lengths in cardiomyocytes by inhibiting phosphorylation of the TGFβ pathway downstream effectors Smad2 and Smad3, which prevents repression of telomerase reverse transcriptase. Findings from this study demonstrate a novel mechanism of telomere length maintenance and provide a potential target for preserving cardiac function.
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Affiliation(s)
- David E Ebeid
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Farid G Khalafalla
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Kathleen M Broughton
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Megan M Monsanto
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Carolina Y Esquer
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Veronica Sacchi
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Nirmala Hariharan
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Kelli I Korski
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Maryam Moshref
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Jacqueline Emathinger
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Christopher T Cottage
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Pearl J Quijada
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Jonathan H Nguyen
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Roberto Alvarez
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Mirko Völkers
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Mathias H Konstandin
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Bingyan J Wang
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Fareheh Firouzi
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Julian M Navarrete
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Natalie A Gude
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Marie-Jose Goumans
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | - Mark A Sussman
- Department of Biology, San Diego State University, North Life Sciences, 426, 5500 Campanile Drive, San Diego, CA 92182, USA
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Yang Y, Song S, Meng Q, Wang L, Li X, Xie S, Chen Y, Jiang X, Wang C, Lu Y, Xin X, Pu H, Gui X, Li T, Xu J, Li J, Jia S, Lu D. miR24-2 accelerates progression of liver cancer cells by activating Pim1 through tri-methylation of Histone H3 on the ninth lysine. J Cell Mol Med 2020; 24:2772-2790. [PMID: 32030886 PMCID: PMC7077597 DOI: 10.1111/jcmm.15030] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 11/07/2019] [Accepted: 12/09/2019] [Indexed: 12/16/2022] Open
Abstract
Several microRNAs are associated with carcinogenesis and tumour progression. Herein, our observations suggest both miR24‐2 and Pim1 are up‐regulated in human liver cancers, and miR24‐2 accelerates growth of liver cancer cells in vitro and in vivo. Mechanistically, miR24‐2 increases the expression of N6‐adenosine‐methyltransferase METTL3 and thereafter promotes the expression of miR6079 via RNA methylation modification. Furthermore, miR6079 targets JMJD2A and then increased the tri‐methylation of histone H3 on the ninth lysine (H3K9me3). Therefore, miR24‐2 inhibits JMJD2A by increasing miR6079 and then increases H3K9me3. Strikingly, miR24‐2 increases the expression of Pim1 dependent on H3K9me3 and METTL3. Notably, our findings suggest that miR24‐2 alters several related genes (pHistone H3, SUZ12, SUV39H1, Nanog, MEKK4, pTyr) and accelerates progression of liver cancer cells through Pim1 activation. In particular, Pim1 is required for the oncogenic action of miR24‐2 in liver cancer. This study elucidates a novel mechanism for miR24‐2 in liver cancer and suggests that miR24‐2 may be used as novel therapeutic targets of liver cancer.
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Affiliation(s)
- Yuxin Yang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China.,School of Medical Technology, Shanghai University of Medicine and Health Sciences, Shanghai, China
| | - Shuting Song
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Qiuyu Meng
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Liyan Wang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Xiaonan Li
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Sijie Xie
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Yingjie Chen
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Xiaoxue Jiang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Chen Wang
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Yanan Lu
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Xiaoru Xin
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Hu Pu
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Xin Gui
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Tianming Li
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
| | - Jie Xu
- School of Medicine, Tongji University, Shanghai, China
| | - Jiao Li
- School of Medicine, Tongji University, Shanghai, China
| | - Song Jia
- School of Medicine, Tongji University, Shanghai, China
| | - Dongdong Lu
- Shanghai Putuo District People's Hospital, School of Life Science and Technology, Tongji University, Shanghai, China
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Ding RR, Yuan JL, Jia YN, Liao XM, Wang SS, Shao ZM, Feng MY, Jie W, Shen ZH. Epstein-Barr virus-encoded LMP1 regulated Pim1 kinase expression promotes nasopharyngeal carcinoma cells proliferation. Onco Targets Ther 2019; 12:1137-1146. [PMID: 30809095 PMCID: PMC6376889 DOI: 10.2147/ott.s190274] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background Epstein–Barr virus-encoded LMP1 plays a critical role in the carcinogenesis of nasopharyngeal carcinoma (NPC), but the mechanism remains elusive. We aimed to analyze the expression and clinical pathological significance of provirus integration site for Moloney murine leukemia virus 1 (Pim1) in clinical NPC, and to elucidate the effect of LMP1 on Pim1 expression and its mechanism. Methods Immunohistochemical staining was used to detect the expression of Pim1 in clinical NPC tissues and control nasopharyngeal chronic inflammation (NPI) tissues, and the correlation between Pim1 and clinical parameters of NPC patients was analyzed. The LMP1 stable expression cell line CNE1-LMP1-OV was constructed through infecting the well-differentiated nasopharyngeal carcinoma cells CNE1 with LMP1 overexpressing lentivirus. Then the in vivo experiments were conducted. Results Among 89 NPC patients, 48 cases (53.93%) were positive for Pim1, while only one case was Pim1 positive in 15 NPI controls (6.67%). Pim1 expression was not correlated with gender, age, smoking status and clinical classification of NPC patients, but positively correlated with T, N and M classification. CNE1-LMP1-OV cell line was successfully established, which displayed a higher cell proliferation ability and Pim1 expression. NF-κB inhibitor PDTC, PKC inhibitor GF109203X and STAT3 inhibitor Stattic significantly attenuated LMP1-induced Pim1 expression, and while AP-1 inhibitor SR11302 showed no inhibitory effect. Interestingly, Pim1 inhibitor quercetagetin significantly inhibited the proliferation of CNE1-LMP1-OV cells. Conclusion LMP1 mediates Pim1 expression through NF-κB, PKC and STAT3 signaling, which promotes the proliferation of NPC cells and participate in the clinical progression of NPC.
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Affiliation(s)
- Ran-Ran Ding
- Department of Pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.,Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China,
| | - Jian-Ling Yuan
- Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China,
| | - Ya-Nan Jia
- Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China, .,Department of Pathology, Dongguan People's Hospital, Dongguan 523059, China
| | - Xiao-Min Liao
- Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China,
| | - Si-Si Wang
- Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China,
| | - Zhong-Ming Shao
- Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China,
| | - Mu-Yin Feng
- Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China,
| | - Wei Jie
- Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China,
| | - Zhi-Hua Shen
- Department of Pathology, School of Basic Medicine Sciences, Guangdong Medical University, Zhanjiang 524023, China,
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Wu Y, Deng Y, Zhu J, Duan Y, Weng W, Wu X. Pim1 promotes cell proliferation and regulates glycolysis via interaction with MYC in ovarian cancer. Onco Targets Ther 2018; 11:6647-6656. [PMID: 30349298 PMCID: PMC6186298 DOI: 10.2147/ott.s180520] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background Ovarian cancer (OC) is the leading cause of death among women with gynecologic malignancies. Recent studies have highlighted the role of Pim1, which belongs to a group of constitutively activated serine/threonine kinases, in cancer development. However, the effect of Pim1 in OC is largely unclear. Methods OC cell lines with Pim1 overexpression or knockdown were constructed with len-tivirus transduction. Cell Counting Kit-8, colony formation, glycolysis stress test and in vivo mice models were carried out to assess the effect of Pim1 on OC biological functions. Co-immunoprecipitation assay coupled with western blot were performed to explore the intrinsic mechanisms of Pim1 in OC. Bioinformatic analysis was then performed to evaluate the expression and prognostic value of Pim1. Results We present the first evidence that silencing or overexpressing Pim1 can suppress or promote, respectively, OC cell proliferation. Furthermore, we demonstrated that Pim1 can significantly enhance glycolysis in OC cells. In vivo experiments further confirmed that knockdown of Pim1 inhibits the growth of tumors derived from the SKOV3 cell line. To search for the underlying molecular mechanism, we examined the effect of Pim1 on MYC, a pivotal gene in glycolysis, and observed that Pim1-mediated phosphorylation of c-Myc activated the expression of glycolysis-associated key genes such as PGK1 and LDHA. Moreover, we found that the Pim1 inhibitor SMI4a induced chemosensitization to cisplatin. Clinically, Pim1 was also overexpressed in OC and correlated with poor overall survival by bioinformatics analysis. Conclusion Together, these results suggest that Pim1 contributes to proliferation and gly-colysis in OC via interaction with MYC and may serve as a potential target in the treatment of OC patients.
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Affiliation(s)
- Yong Wu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China, .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China,
| | - Yu Deng
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China, .,Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China
| | - Jun Zhu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China, .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China,
| | - Yachen Duan
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China, .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China,
| | - WeiWei Weng
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China, .,Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China
| | - Xiaohua Wu
- Department of Gynecologic Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China, .,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China,
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Zhu HH, Wang XT, Sun YH, He WK, Liang JB, Mo BH, Li L. Pim1 Overexpression Prevents Apoptosis in Cardiomyocytes After Exposure to Hypoxia and Oxidative Stress via Upregulating Cell Autophagy. Cell Physiol Biochem 2018; 49:2138-2150. [PMID: 30257237 DOI: 10.1159/000493817] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 09/18/2018] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND/AIMS Microvascular obstruction (MVO), an undesirable complication of percutaneous coronary intervention, is independently associated with adverse left ventricle remodeling and poor prognosis after acute myocardial infarction. Hypoxia and oxidative stress major roles in the pathophysiology of MVO. Pim1 serves an important protective role in the ischemic myocardium, but the underlying mechanisms remain poorly defined. Autophagy in early hypoxia or during moderate oxidative stress has been demonstrated to protect the myocardium. In this study, we investigated the association between the protective effect of Pim1 and autophagy after hypoxia and oxidative stress. METHODS Ventricular myocytes from neonatal rat heart (NRVMs) were isolated. NRVMs were exposed to hypoxia and H2O2. Rapamycin and 3-methyladenine (3-MA) were used as an activator and inhibitor of autophagy, respectively. pHBAd-Pim1 was transfected into NRVMs. We assessed cardiomyocyte apoptosis by Annexin V-FITC/PI flow cytometry. Autophagy was evaluated by mRFP-GFP-LC3 adenovirus infection by confocal microscopy. Western blotting was used to quantify apoptosis or autophagy protein (caspase-3, LC3, P62, AMPK, mTOR, ATG5) concentrations. RESULTS Autophagy and apoptosis in NRVMs significantly increased and peaked at 3 h and 6 h, respectively, after exposure to hypoxia and H2O2. The mTOR inhibitor rapamycin induced autophagy and decreased cardiomyocyte apoptosis, but the autophagy inhibitor 3-MA decreased autophagy and increased apoptosis at 3 h after exposure to hypoxia and H2O2. Pim1 levels in NRVMs increased at 3 h and decreased gradually after exposure to hypoxia and H2O2. Pim1 overexpression enhanced autophagy and decreased apoptosis. Pim1-induced promotion of autophagy is partly the result of activation of the AMPK/mTOR/ATG5 pathway after exposure to hypoxia and H2O2. CONCLUSION Our results revealed that Pim1 overexpression prevented NRVMs from apoptosis via upregulating autophagy after exposure to hypoxia and oxidative stress, partly through activation of the AMPK/mTOR/ATG5 autophagy pathway.
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Wu F, Li S, Zhang N, Huang W, Li X, Wang M, Bai D, Han B. Hispidulin alleviates high-glucose-induced podocyte injury by regulating protective autophagy. Biomed Pharmacother 2018; 104:307-14. [PMID: 29775899 DOI: 10.1016/j.biopha.2018.05.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Revised: 04/24/2018] [Accepted: 05/07/2018] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES Diabetic nephropathy (DN) is one of the most common complications in patients with diabetes, and the discovery of novel targeted therapeutic approaches for DN treatment still faces severe challenges. In the current study, we aimed to discover a novel natural product for potential DN treatment and determine its molecular mechanisms. MATERIALS AND METHODS Methylthiazoltetrazolium (MTT) assay was employed to evaluate cell viability. Transmission electron microscopy, GFP-LC3 fluorescence fusion plasmid, and Annexin V/PI apoptosis assay were carried out to determine cellular autophagy and apoptosis. Moreover, quantitative proteomics and bioinformatics analysis, Western blotting, and RNA interference were performed to investigate potential molecular mechanisms. RESULTS Hispidulin displayed protective capacity on the high-glucose-induced podocyte injury models by activating autophagy and inhibiting apoptosis. The mechanism for hispidulin-induced autophagy was associated to Pim1 inhibition and the regulation of Pim1-p21-mTOR signaling axis. Moreover, quantitative proteomics and bioinformatics analysis revealed that the hispidulin-regulated Pim1 inhibition was associated to RAB18, NRas, PARK7, and FIS1. CONCLUSIONS These results indicate that hispidulin induces autophagy and inhibits apoptosis induced by high glucose in murine podocytes. This study will illuminate future developments in DN-targeted therapy.
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An J, Xu J, Li J, Jia S, Li X, Lu Y, Yang Y, Lin Z, Xin X, Wu M, Zheng Q, Pu H, Gui X, Li T, Lu D. HistoneH3 demethylase JMJD2A promotes growth of liver cancer cells through up-regulating miR372. Oncotarget 2018; 8:49093-49109. [PMID: 28467776 PMCID: PMC5564752 DOI: 10.18632/oncotarget.17095] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Accepted: 04/01/2017] [Indexed: 11/25/2022] Open
Abstract
Changes in histone lysine methylation status have been observed during cancer formation. JMJD2A protein is a demethylase that is overexpressed in several tumors. Herein, our results demonstrate that JMJD2A accelerates malignant progression of liver cancer cells in vitro and in vivo. Mechanistically, JMJD2A promoted the expression and mature of pre-miR372 epigenetically. Notably, miR372 blocks the editing of 13th exon-introns-14th exon and forms a novel transcript(JMJD2AΔ) of JMJD2A. In particular, JMJD2A inhibited P21(WAF1/Cip1) expression by decreasing H3K9me3 dependent on JMJD2AΔ. Thereby, JMJD2A could enhance Pim1 transcription by suppressing P21(WAF1/Cip1). Furthermore, through increasing the expression of Pim1, JMJD2A could facilitate the interaction among pRB, CDK2 and CyclinE which prompts the transcription and translation of oncogenic C-myc. Strikingly, JMJD2A may trigger the demethylation of Pim1. On the other hand, Pim1 knockdown and P21(WAF1/Cip1) overexpression fully abrogated the oncogenic function of JMJD2A. Our observations suggest that JMJD2A promotes liver cancer cell cycle progress through JMJD2A-miR372-JMJD2AΔ-P21WAF1/Cip1-Pim1-pRB-CDK2-CyclinE-C-myc axis. This study elucidates a novel mechanism for JMJD2A in liver cancer cells and suggests that JMJD2A can be used as a novel therapeutic targets of liver cancer.
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Affiliation(s)
- Jiahui An
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Jie Xu
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Jiao Li
- School of Medicine, Tongji University, Shanghai, 200092, China
| | - Song Jia
- School of Medicine, Tongji University, Shanghai, 200092, China
| | - Xiaonan Li
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Yanan Lu
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Yuxin Yang
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Zhuojia Lin
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Xiaoru Xin
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Mengying Wu
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Qidi Zheng
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Hu Pu
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Xin Gui
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Tianming Li
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
| | - Dongdong Lu
- School of Life Science and Technology, Tongji University, Shanghai, 20092, China
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10
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Zhang M, Liu T, Sun H, Weng W, Zhang Q, Liu C, Han Y, Sheng W. Pim1 supports human colorectal cancer growth during glucose deprivation by enhancing the Warburg effect. Cancer Sci 2018. [PMID: 29516572 PMCID: PMC5980151 DOI: 10.1111/cas.13562] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cancer cells metabolize glucose mainly by glycolysis and are well adapted to metabolic stress. Pim1 is an oncogene that promotes colorectal cancer (CRC) growth and metastasis, and its expression is positively correlated with CRC progression. However, the mechanism underlying Pim1 overexpression during CRC progression and the role of Pim1 in CRC metabolism remains unclear. In the present study, we discovered that Pim1 expression was significantly upregulated in response to glucose deprivation‐induced metabolic stress by AMP‐activated protein kinase signaling. Pim1 promoted CRC cell proliferation in vitro and tumorigenicity in vivo. Clinical observations showed that Pim1 expression was higher in CRC tissues than in adjacent normal tissues. Pim1 overexpression in CRC tissues not only predicted CRC prognosis in patients but also showed a positive relationship with 18F‐fluorodeoxyglucose uptake. Further in vitro experiments showed that Pim1 promoted the Warburg effect and that Pim1 expression was positively correlated with hexokinase 2 and lactate dehydrogenase A expression. Pim1‐silenced cells were more vulnerable to glucose starvation, and Pim1‐induced tumor proliferation or tolerance to glucose starvation was attenuated by blocking the Warburg effect. In conclusion, glucose deprivation is one of the mechanisms that leads to elevated Pim1 expression in CRC, and Pim1 upregulation ensures CRC growth in response to glucose deprivation by facilitating the Warburg effect in a compensatory way.
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Affiliation(s)
- Meng Zhang
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China.,Department of Pathology, Shanghai Medical College, Fudan University, Shanghai, China.,Institute of Pathology, Fudan University, Shanghai, China
| | - Tingting Liu
- Department of Pathology, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Hui Sun
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China.,Institute of Pathology, Fudan University, Shanghai, China
| | - Weiwei Weng
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China.,Institute of Pathology, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Qiongyan Zhang
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China.,Institute of Pathology, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Chenchen Liu
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Gastric Cancer Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Yang Han
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Gastric Cancer Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Weiqi Sheng
- Department of Pathology, Fudan University Shanghai Cancer Center, Shanghai, China.,Institute of Pathology, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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11
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Aweya JJ, Wang W, Zhang Y, Yao D, Li S, Wang F. Identification and molecular characterization of the Pim1 serine/threonine kinase homolog in Litopenaeus vannamei. Fish Shellfish Immunol 2018; 74:491-500. [PMID: 29355758 DOI: 10.1016/j.fsi.2018.01.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 01/08/2018] [Accepted: 01/11/2018] [Indexed: 06/07/2023]
Abstract
The Pim1 serine/threonine kinase is associated with multiple cellular functions including proliferation, survival, differentiation, apoptosis, tumorigenesis, immune regulation and inflammation in vertebrates. However, little is known about the role of Pim1 in invertebrate immunity. In this study, we identified and characterized for the first time, a Pim1 (LvPim1) gene in Litopenaeus vannamei, with a full-length cDNA of 2352 bp and a 1119 bp open reading frame (ORF) encoding a putative protein of 372 amino acids, which contains a typical serine/threonine kinase domain. Sequence and phylogenetic analysis revealed that LvPim1 shared a close evolutionary relationship with Pim1 from vertebrates. Real-time qPCR analysis showed that LvPim1 was widely expressed in all tissues tested; with its transcript level induced in hepatopancreas and hemocytes upon challenge with Vibrio parahaemolyticus, Streptoccocus iniae, lipopolysaccharide (LPS), and white spot syndrome virus (WSSV), thus, suggesting its probable involvement in shrimp immune response. Moreover, knockdown of LvPim1 resulted in increased hemocytes apoptosis; shown by high caspase3/7 activity, coupled with increase in pro-apoptotic LvCaspase3 and LvCytochrome C, and decrease in pro-survival LvBcl2, LvIAP1, and LvIAP2 mRNA expression in hemocytes. Finally, LvPim1 knockdown renders shrimps more susceptible to V. parahaemolyticus infection. Taken together, our present data strongly suggest that LvPim1 is involved in modulating shrimp resistance to pathogen infection, promote hemocytes survival, and therefore plays a role in shrimp immune response.
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Affiliation(s)
- Jude Juventus Aweya
- Department of Biology and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China
| | - Wei Wang
- Department of Biology and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China
| | - Yueling Zhang
- Department of Biology and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China
| | - Defu Yao
- Department of Biology and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China
| | - Shengkang Li
- Department of Biology and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China
| | - Fan Wang
- Department of Biology and Guangdong Provincial Key Laboratory of Marine Biotechnology, Shantou University, Shantou 515063, China.
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12
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Chen M, Yi B, Zhu N, Wei X, Zhang GX, Huang S, Sun J. Pim1 kinase promotes angiogenesis through phosphorylation of endothelial nitric oxide synthase at Ser-633. Cardiovasc Res 2016; 109:141-50. [PMID: 26598507 PMCID: PMC4692291 DOI: 10.1093/cvr/cvv250] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 10/28/2015] [Accepted: 11/02/2015] [Indexed: 11/14/2022] Open
Abstract
AIMS Posttranslational modification, such as phosphorylation, plays an essential role in regulating activation of endothelial NO synthase (eNOS). In the present study, we aim to determine whether eNOS could be phosphorylated and regulated by a novel serine/threonine-protein kinase Pim1 in vascular endothelial cells (ECs). METHODS AND RESULTS Using immunoprecipitation and protein kinase assays, we demonstrated that Pim1 specifically interacts with eNOS, which leads to a marked phosphorylation of eNOS at Ser-633 and increased production of nitric oxide (NO). Intriguingly, in response to VEGF stimulation, eNOS phosphorylation at Ser-633 exhibits two distinct phases: transient phosphorylation occurring between 0 and 60 min and sustained phosphorylation occurring between 2 and 24 h, which are mediated by the protein kinase A (PKA) and Pim1, respectively. Inhibiting Pim1 by either pharmacological inhibitor SMI-4a or the dominant-negative form of Pim1 markedly attenuates VEGF-induced tube formation, while Pim1 overexpression significantly increases EC tube formation and migration in an NO-dependent manner. Importantly, Pim1 expression and eNOS phosphorylation at Ser-633 were substantially decreased in high glucose-treated ECs and in the aorta of db/db diabetic mice. Increased Pim1 expression ameliorates impaired vascular angiogenesis in diabetic mice, as determined by an ex vivo aortic ring assay. CONCLUSION Our findings demonstrate Pim1 as a novel kinase that is responsible for the phosphorylation of eNOS at Ser-633 and enhances EC sprouting of aortic rings from diabetic mice, suggesting that Pim1 could potentially serve as a novel therapeutic target for revascularization strategies.
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Affiliation(s)
- Ming Chen
- Center for Translational Medicine, Thomas Jefferson University, 1020 Locust Street, Room 286G, Philadelphia, PA 19107, USA
| | - Bing Yi
- Center for Translational Medicine, Thomas Jefferson University, 1020 Locust Street, Room 286G, Philadelphia, PA 19107, USA
| | - Ni Zhu
- Center for Translational Medicine, Thomas Jefferson University, 1020 Locust Street, Room 286G, Philadelphia, PA 19107, USA
| | - Xin Wei
- Center for Translational Medicine, Thomas Jefferson University, 1020 Locust Street, Room 286G, Philadelphia, PA 19107, USA
| | - Guan-Xin Zhang
- Center for Translational Medicine, Thomas Jefferson University, 1020 Locust Street, Room 286G, Philadelphia, PA 19107, USA The Institute of Cardiothoracic Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - Shengdong Huang
- The Institute of Cardiothoracic Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
| | - Jianxin Sun
- Center for Translational Medicine, Thomas Jefferson University, 1020 Locust Street, Room 286G, Philadelphia, PA 19107, USA The Institute of Cardiothoracic Surgery, Changhai Hospital, Second Military Medical University, Shanghai 200433, China
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13
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Pinti M, Gibellini L, Liu Y, Xu S, Lu B, Cossarizza A. Mitochondrial Lon protease at the crossroads of oxidative stress, ageing and cancer. Cell Mol Life Sci 2015; 72:4807-24. [PMID: 26363553 PMCID: PMC11113732 DOI: 10.1007/s00018-015-2039-3] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 09/01/2015] [Accepted: 09/07/2015] [Indexed: 11/26/2022]
Abstract
Lon protease is a nuclear DNA-encoded mitochondrial enzyme highly conserved throughout evolution, involved in the degradation of damaged and oxidized proteins of the mitochondrial matrix, in the correct folding of proteins imported in mitochondria, and in the maintenance of mitochondrial DNA. Lon expression is induced by various stimuli, including hypoxia and reactive oxygen species, and provides protection against cell stress. Lon down-regulation is associated with ageing and with cell senescence, while up-regulation is observed in tumour cells, and is correlated with a more aggressive phenotype of cancer. Lon up-regulation contributes to metabolic reprogramming observed in cancer, favours the switch from a respiratory to a glycolytic metabolism, helping cancer cell survival in the tumour microenvironment, and contributes to epithelial to mesenchymal transition. Silencing of Lon, or pharmacological inhibition of its activity, causes cell death in various cancer cells. Thus, Lon can be included in the growing class of proteins that are not responsible for oncogenic transformation, but that are essential for survival and proliferation of cancer cells, and that can be considered as a new target for development of anticancer drugs.
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Affiliation(s)
- Marcello Pinti
- Department of Life Sciences, University of Modena and Reggio Emilia, Via Campi, 287, 41125, Modena, Italy.
| | - Lara Gibellini
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Yongzhang Liu
- School of Life Sciences, Institute of Biophysics, Attardi Institute of Mitochondrial Biomedicine and Zhejiang Provincial Key Laboratory of Medical Genetics, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Shan Xu
- School of Life Sciences, Institute of Biophysics, Attardi Institute of Mitochondrial Biomedicine and Zhejiang Provincial Key Laboratory of Medical Genetics, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Bin Lu
- School of Life Sciences, Institute of Biophysics, Attardi Institute of Mitochondrial Biomedicine and Zhejiang Provincial Key Laboratory of Medical Genetics, Wenzhou Medical University, Wenzhou, 325035, Zhejiang, China
| | - Andrea Cossarizza
- Department of Surgery, Medicine, Dentistry and Morphological Sciences, University of Modena and Reggio Emilia, Modena, Italy
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14
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Abstract
During cardiac aging, DNA damage and environmental stressors contribute to telomeric shortening and human cardiac progenitor cells acquire a senescent phenotype that leads to decreased stem cell function. Reversion of this phenotype through genetic modification is essential to advance regenerative therapy. Studies in the cardiac specific overexpression and subcellular targeting of Pim1 kinase demonstrate its influence on regeneration, proliferation, survival, metabolism and senescence. The cardioprotective effects of Pim1 modification can be picked apart and enhanced by targeting the kinase to distinct subcellular compartments, allowing for selection of specific phenotypic traits after molecular modification. In this perspective, we examine the therapeutic implications of Pim1 to encourage the personalization of cardiac regenerative therapy.
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Affiliation(s)
- Kaitlen Samse
- San Diego Heart Research Institute, San Diego State University, San Diego, CA 92182, United States
| | - Nirmala Hariharan
- San Diego Heart Research Institute, San Diego State University, San Diego, CA 92182, United States
| | - Mark A Sussman
- San Diego Heart Research Institute, San Diego State University, San Diego, CA 92182, United States.
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15
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Samse K, Emathinger J, Hariharan N, Quijada P, Ilves K, Völkers M, Ormachea L, De La Torre A, Orogo AM, Alvarez R, Din S, Mohsin S, Monsanto M, Fischer KM, Dembitsky WP, Gustafsson ÅB, Sussman MA. Functional Effect of Pim1 Depends upon Intracellular Localization in Human Cardiac Progenitor Cells. J Biol Chem 2015; 290:13935-47. [PMID: 25882843 DOI: 10.1074/jbc.m114.617431] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Indexed: 01/07/2023] Open
Abstract
Human cardiac progenitor cells (hCPC) improve heart function after autologous transfer in heart failure patients. Regenerative potential of hCPCs is severely limited with age, requiring genetic modification to enhance therapeutic potential. A legacy of work from our laboratory with Pim1 kinase reveals effects on proliferation, survival, metabolism, and rejuvenation of hCPCs in vitro and in vivo. We demonstrate that subcellular targeting of Pim1 bolsters the distinct cardioprotective effects of this kinase in hCPCs to increase proliferation and survival, and antagonize cellular senescence. Adult hCPCs isolated from patients undergoing left ventricular assist device implantation were engineered to overexpress Pim1 throughout the cell (PimWT) or targeted to either mitochondrial (Mito-Pim1) or nuclear (Nuc-Pim1) compartments. Nuc-Pim1 enhances stem cell youthfulness associated with decreased senescence-associated β-galactosidase activity, preserved telomere length, reduced expression of p16 and p53, and up-regulation of nucleostemin relative to PimWT hCPCs. Alternately, Mito-Pim1 enhances survival by increasing expression of Bcl-2 and Bcl-XL and decreasing cell death after H2O2 treatment, thereby preserving mitochondrial integrity superior to PimWT. Mito-Pim1 increases the proliferation rate by up-regulation of cell cycle modulators Cyclin D, CDK4, and phospho-Rb. Optimal stem cell traits such as proliferation, survival, and increased youthful properties of aged hCPCs are enhanced after targeted Pim1 localization to mitochondrial or nuclear compartments. Targeted Pim1 overexpression in hCPCs allows for selection of the desired phenotypic properties to overcome patient variability and improve specific stem cell characteristics.
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Affiliation(s)
- Kaitlen Samse
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Jacqueline Emathinger
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Nirmala Hariharan
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Pearl Quijada
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Kelli Ilves
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Mirko Völkers
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Lucia Ormachea
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Andrea De La Torre
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Amabel M Orogo
- the Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, and
| | - Roberto Alvarez
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Shabana Din
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Sadia Mohsin
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Megan Monsanto
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Kimberlee M Fischer
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | | | - Åsa B Gustafsson
- the Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, and
| | - Mark A Sussman
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182,
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