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Lee B, Park SJ, Lee S, Lee J, Lee E, Yoo ES, Chung WS, Sohn JW, Oh BC, Kim S. Lomitapide, a cholesterol-lowering drug, is an anticancer agent that induces autophagic cell death via inhibiting mTOR. Cell Death Dis 2022; 13:603. [PMID: 35831271 PMCID: PMC9279289 DOI: 10.1038/s41419-022-05039-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 06/16/2022] [Accepted: 06/27/2022] [Indexed: 01/21/2023]
Abstract
Autophagy is a biological process that maintains cellular homeostasis and regulates the internal cellular environment. Hyperactivating autophagy to trigger cell death has been a suggested therapeutic strategy for cancer treatment. Mechanistic target of rapamycin (mTOR) is a crucial protein kinase that regulates autophagy; therefore, using a structure-based virtual screen analysis, we identified lomitapide, a cholesterol-lowering drug, as a potential mTOR complex 1 (mTORC1) inhibitor. Our results showed that lomitapide directly inhibits mTORC1 in vitro and induces autophagy-dependent cancer cell death by decreasing mTOR signaling, thereby inhibiting the downstream events associated with increased LC3 conversion in various cancer cells (e.g., HCT116 colorectal cancer cells) and tumor xenografts. Lomitapide also significantly suppresses the growth and viability along with elevated autophagy in patient-derived colorectal cancer organoids. Furthermore, a combination of lomitapide and immune checkpoint blocking antibodies synergistically inhibits tumor growth in murine MC38 or B16-F10 preclinical syngeneic tumor models. These results elucidate the direct, tumor-relevant immune-potentiating benefits of mTORC1 inhibition by lomitapide, which complement the current immune checkpoint blockade. This study highlights the potential repurposing of lomitapide as a new therapeutic option for cancer treatment.
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Affiliation(s)
- Boah Lee
- grid.37172.300000 0001 2292 0500Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 Korea ,grid.37172.300000 0001 2292 0500Department of Biological Sciences, KAIST, Daejeon, 34141 Korea ,Present Address: ERSTEQ co., Ltd, Daejeon, 34013 Korea
| | - Seung Ju Park
- grid.37172.300000 0001 2292 0500Department of Biological Sciences, KAIST, Daejeon, 34141 Korea ,Present Address: ERSTEQ co., Ltd, Daejeon, 34013 Korea
| | - Seulgi Lee
- grid.37172.300000 0001 2292 0500Department of Biological Sciences, KAIST, Daejeon, 34141 Korea ,Present Address: ERSTEQ co., Ltd, Daejeon, 34013 Korea
| | - Jinwook Lee
- grid.256155.00000 0004 0647 2973Department of Physiology, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, College of Medicine, Incheon, 21999 Korea
| | - Eunbeol Lee
- grid.37172.300000 0001 2292 0500Department of Biological Sciences, KAIST, Daejeon, 34141 Korea
| | - Eun-Seon Yoo
- grid.37172.300000 0001 2292 0500Department of Biological Sciences, KAIST, Daejeon, 34141 Korea
| | - Won-Suk Chung
- grid.37172.300000 0001 2292 0500Department of Biological Sciences, KAIST, Daejeon, 34141 Korea
| | - Jong-Woo Sohn
- grid.37172.300000 0001 2292 0500Department of Biological Sciences, KAIST, Daejeon, 34141 Korea
| | - Byung-Chul Oh
- grid.256155.00000 0004 0647 2973Department of Physiology, Lee Gil Ya Cancer and Diabetes Institute, Gachon University, College of Medicine, Incheon, 21999 Korea
| | - Seyun Kim
- grid.37172.300000 0001 2292 0500Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141 Korea ,grid.37172.300000 0001 2292 0500Department of Biological Sciences, KAIST, Daejeon, 34141 Korea ,grid.37172.300000 0001 2292 0500KAIST Institute for the BioCentury, KAIST, Daejeon, 34141 Korea ,grid.37172.300000 0001 2292 0500KAIST Stem Cell Center, KAIST, Daejeon, 34141 Korea
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102
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Beaudry AG, Law ML. Leucine Supplementation in Cancer Cachexia: Mechanisms and a Review of the Pre-Clinical Literature. Nutrients 2022; 14:nu14142824. [PMID: 35889781 PMCID: PMC9323748 DOI: 10.3390/nu14142824] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/06/2022] [Accepted: 07/06/2022] [Indexed: 12/16/2022] Open
Abstract
Cancer cachexia (CC) is a complex syndrome of bodily wasting and progressive functional decline. Unlike starvation, cachexia cannot be reversed by increased energy intake alone. Nonetheless, targeted nutritional support is a necessary component in multimodal syndrome management. Due to the highly catabolic nature of cancer cachexia, amino acid supplementation has been proposed. Interestingly, leucine has been found to increase protein synthesis and decrease protein degradation via mTORC1 pathway activation. Multiple pre-clinical studies have explored the impact of leucine supplementation in cachectic tumor-bearing hosts. Here, we provide an overview of leucine’s proposed modes of action to preserve lean mass in cachexia and review the current pre-clinical literature related to leucine supplementation during CC. Current research indicates that a leucine-rich diet may attenuate CC symptomology; however, these works are difficult to compare due to methodological differences. There is need for further pre-clinical work exploring leucine’s potential ability to modulate protein turnover and immune response during CC, as well as the impact of additive leucine on tumor growth.
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Affiliation(s)
- Anna G. Beaudry
- Department of Health, Human Performance, and Recreation, Robbins College of Health and Human Sciences, Baylor University, Waco, TX 76706, USA
- Correspondence:
| | - Michelle L. Law
- Department of Human Sciences and Design, Robbins College of Health and Human Sciences, Baylor University, Waco, TX 76706, USA;
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Li L, Zhu T, Huang L, Ren M. Target of Rapamycin Signaling Involved in the Regulation of Photosynthesis and Cellular Metabolism in Chlorella sorokiniana. Int J Mol Sci 2022; 23:ijms23137451. [PMID: 35806454 PMCID: PMC9266951 DOI: 10.3390/ijms23137451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 06/24/2022] [Accepted: 06/28/2022] [Indexed: 11/16/2022] Open
Abstract
Target of rapamycin (TOR) is a serine/threonine protein kinase that plays a central regulating role in cell proliferation, growth, and metabolism, but little is known about the TOR signaling pathway in Chlorella sorokiniana. In this study, a Chlorella sorokiniana DP-1 strain was isolated and identified, and its nutritional compositions were analyzed. Based on homologous sequence analysis, the conserved CsTOR protein was found in the genome of Chlorella sorokiniana. In addition, the key components of TOR complex 1 (TORC1) were present, but the components of TORC2 (RICTOR and SIN1) were absent in Chlorella sorokiniana. Pharmacological assays showed that Chlorella sorokiniana DP-1 was insensitive to rapamycin, Torin1 and KU0063794, whereas AZD8055 could significantly inhibit the growth of Chlorella sorokiniana. RNA-seq analysis showed that CsTOR regulated various metabolic processes and signal transduction pathways in AZD8055-treated Chlorella sorokiniana DP-1. Most genes involved in photosynthesis and carbon fixation in Chlorella sorokiniana DP-1 were significantly downregulated under CsTOR inhibition, indicating that CsTOR positively regulated the photosynthesis in Chlorella sorokiniana. Furthermore, CsTOR controlled protein synthesis and degradation by positively regulating ribosome synthesis and negatively regulating autophagy. These observations suggested that CsTOR plays an important role in photosynthesis and cellular metabolism, and provide new insights into the function of CsTOR in Chlorella sorokiniana.
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Zou D, Coudron TA, Wu H, Zhang L, Wang M, Xu W, Xu J, Song L, Xiao X. Differential Proteomics Analysis Unraveled Mechanisms of Arma chinensis Responding to Improved Artificial Diet. INSECTS 2022; 13:insects13070605. [PMID: 35886781 PMCID: PMC9319121 DOI: 10.3390/insects13070605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/25/2022] [Accepted: 06/28/2022] [Indexed: 12/03/2022]
Abstract
Simple Summary Arma chinensis Fallou is a predaceous stink bug that can effectively control many kinds of agricultural and forest pests, such as fall armyworm, cotton bollworm and Colorado potato beetle. An insect-free artificial diet comprising chicken egg, tuna fish and raw pig liver was developed for A. chinensis. Several biological characteristics were diminished for A. chinensis reared on the artificial diet compared to the pupae of Chinese oak silk moth. Changes in the formulation of the diet were made in response to the transcriptome results and tested using biological characteristics. Several parameters were improved over 6 generations, although the improved artificial diet remained inferior to the pupae of Chinese oak silk moth regarding egg viability, fecundity, body weight, and nymphal development time. The current study reported the differential proteomic analysis revealing the mechanism of A. chinensis responding to the improved artificial diet. This information will be used to optimize the formulation of the artificial diet and decrease the cost of mass rearing in A. chinensis. Abstract The development of artificial diets could considerably simplify and reduce the cost of mass rearing of natural enemies compared to conventional rearing methods. However, improvement of artificial diets can be tedious, convoluted and often uncertain. For accelerating diet development, a better method that can offer informative feedback to target deficiencies in diet improvement is required. Our previous research demonstrated several biological characteristics were diminished in the insect predator, Arma chinensis Fallou, fed on an artificial diet formulated with the aid of transcriptomic methods compared to the Chinese oak silk moth pupae. The present study reports differential proteomic analysis by iTRAQ-PRM, which unravels the molecular mechanism of A. chinensis responding to improvements in the artificial diet. Our study provides multivariate proteomic data and provides comprehensive sequence information in studying A. chinensis. Further, the physiological roles of the differentially expressed proteins and pathways enable us to explain several biological differences between natural prey-fed and improved diet-fed A. chinensis, and subsequent proposed reformulation optimizations to artificial diets.
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Affiliation(s)
- Deyu Zou
- Mass Production Base of Natural Enemy Insects of Tianjin Academy of Agricultural Sciences, Institute of Plant Protection, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China; (D.Z.); (W.X.); (J.X.)
| | - Thomas A. Coudron
- Biological Control of Insects Research Laboratory, USDA-Agricultural Research Service, Columbia, MO 65203-3535, USA;
| | - Huihui Wu
- College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 300392, China; (L.S.); (X.X.)
- Correspondence: ; Tel.: +86-22-23781319
| | - Lisheng Zhang
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (L.Z.); (M.W.)
| | - Mengqing Wang
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (L.Z.); (M.W.)
| | - Weihong Xu
- Mass Production Base of Natural Enemy Insects of Tianjin Academy of Agricultural Sciences, Institute of Plant Protection, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China; (D.Z.); (W.X.); (J.X.)
| | - Jingyang Xu
- Mass Production Base of Natural Enemy Insects of Tianjin Academy of Agricultural Sciences, Institute of Plant Protection, Tianjin Academy of Agricultural Sciences, Tianjin 300384, China; (D.Z.); (W.X.); (J.X.)
| | - Liuxiao Song
- College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 300392, China; (L.S.); (X.X.)
| | - Xuezhuang Xiao
- College of Horticulture and Landscape, Tianjin Agricultural University, Tianjin 300392, China; (L.S.); (X.X.)
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105
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Wang J, Eming SA, Ding X. Role of mTOR Signaling Cascade in Epidermal Morphogenesis and Skin Barrier Formation. BIOLOGY 2022; 11:biology11060931. [PMID: 35741452 PMCID: PMC9220260 DOI: 10.3390/biology11060931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 11/16/2022]
Abstract
Simple Summary The skin epidermis is a stratified multilayered epithelium that provides a life-sustaining protective and defensive barrier for our body. The barrier machinery is established and maintained through a tightly regulated keratinocyte differentiation program. Under normal conditions, the basal layer keratinocytes undergo active proliferation and migration upward, differentiating into the suprabasal layer cells. Perturbation of the epidermal differentiation program often results in skin barrier defects and inflammatory skin disorders. The protein kinase mechanistic target of rapamycin (mTOR) is the central hub of cell growth, metabolism and nutrient signaling. Over the past several years, we and others using transgenic mouse models have unraveled that mTOR signaling is critical for epidermal differentiation and barrier formation. On the other hand, there is increasing evidence that disturbed activation of mTOR signaling is significantly implicated in the development of various skin diseases. In this review, we focus on the formation of skin barrier and discuss the current understanding on how mTOR signaling networks, including upstream inputs, kinases and downstream effectors, regulate epidermal differentiation and skin barrier formation. We hope this review will help us better understand the metabolic signaling in the epidermis, which may open new vistas for epidermal barrier defect-associated disease therapy. Abstract The skin epidermis, with its capacity for lifelong self-renewal and rapid repairing response upon injury, must maintain an active status in metabolism. Mechanistic target of rapamycin (mTOR) signaling is a central controller of cellular growth and metabolism that coordinates diverse physiological and pathological processes in a variety of tissues and organs. Recent evidence with genetic mouse models highlights an essential role of the mTOR signaling network in epidermal morphogenesis and barrier formation. In this review, we focus on the recent advances in understanding how mTOR signaling networks, including upstream inputs, kinases and downstream effectors, regulate epidermal morphogenesis and skin barrier formation. Understanding the details of the metabolic signaling will be critical for the development of novel pharmacological approaches to promote skin barrier regeneration and to treat epidermal barrier defect-associated diseases.
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Affiliation(s)
- Juan Wang
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China;
- Shanghai Engineering Research Center of Organ Repair, School of Medicine, Shanghai University, Shanghai 200444, China
| | - Sabine A. Eming
- Department of Dermatology, University of Cologne, 50937 Cologne, Germany
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne, 50674 Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
- Institute of Zoology, Developmental Biology Unit, University of Cologne, 50674 Cologne, Germany
- Correspondence: (S.A.E.); (X.D.); Tel.: +86-137-6457-1130 (X.D.)
| | - Xiaolei Ding
- Institute of Geriatrics (Shanghai University), Affiliated Nantong Hospital of Shanghai University (The Sixth People’s Hospital of Nantong), School of Medicine, Shanghai University, Nantong 226011, China;
- Shanghai Engineering Research Center of Organ Repair, School of Medicine, Shanghai University, Shanghai 200444, China
- Department of Dermatology, University of Cologne, 50937 Cologne, Germany
- Correspondence: (S.A.E.); (X.D.); Tel.: +86-137-6457-1130 (X.D.)
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106
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Wang YJ, Li QM, Zha XQ, Luo JP. Intervention and potential mechanism of non-starch polysaccharides from natural resources on ulcerative colitis: A review. Int J Biol Macromol 2022; 210:545-564. [PMID: 35513106 DOI: 10.1016/j.ijbiomac.2022.04.208] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Revised: 04/08/2022] [Accepted: 04/27/2022] [Indexed: 12/12/2022]
Abstract
Ulcerative colitis (UC) is a chronic inflammatory bowel disease of unknown etiology that affects the colon and rectum. It has evolved into a global burden due to the high incidence in developed countries and the highly-increased incidence in developing countries. Non-starch polysaccharides (NSPs) from natural resources, as a type of functional carbohydrates, have a significant therapeutic effect on UC because of their good anti-inflammatory and immunomodulatory activities. Based on the etiology and pathogenesis of UC, this review summarizes the intervention effects and mechanisms of NSPs in the prevention and treatment of UC. The results showed that NSPs can improve UC by protecting the intestinal mucosal barrier, regulating the immune response of the intestinal mucosa, and remodeling the intestinal flora and metabolites. These contents provide theoretical basis for the application of polysaccharides in the prevention and treatment of UC.
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Affiliation(s)
- Yu-Jing Wang
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Qiang-Ming Li
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Xue-Qiang Zha
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China
| | - Jian-Ping Luo
- School of Food and Biological Engineering, Hefei University of Technology, Hefei 230009, China; Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei 230601, China.
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107
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Dakic T, Jevdjovic T, Vujovic P, Mladenovic A. The Less We Eat, the Longer We Live: Can Caloric Restriction Help Us Become Centenarians? Int J Mol Sci 2022; 23:ijms23126546. [PMID: 35742989 PMCID: PMC9223351 DOI: 10.3390/ijms23126546] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/07/2022] [Accepted: 06/08/2022] [Indexed: 02/04/2023] Open
Abstract
Striving for longevity is neither a recent human desire nor a novel scientific field. The first article on this topic was published in 1838, when the average human life expectancy was approximately 40 years. Although nowadays people on average live almost as twice as long, we still (and perhaps more than ever) look for new ways to extend our lifespan. During this seemingly endless journey of discovering efficient methods to prolong life, humans were enthusiastic regarding several approaches, one of which is caloric restriction (CR). Where does CR, initially considered universally beneficial for extending both lifespan and health span, stand today? Does a lifelong decrease in food consumption represent one of the secrets of centenarians’ long and healthy life? Do we still believe that if we eat less, we will live longer? This review aims to summarize the current literature on CR as a potential life-prolonging intervention in humans and discusses metabolic pathways that underlie this effect.
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Affiliation(s)
- Tamara Dakic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry “Ivan Djaja”, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia; (T.D.); (T.J.); (P.V.)
| | - Tanja Jevdjovic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry “Ivan Djaja”, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia; (T.D.); (T.J.); (P.V.)
| | - Predrag Vujovic
- Department for Comparative Physiology and Ecophysiology, Institute for Physiology and Biochemistry “Ivan Djaja”, Faculty of Biology, University of Belgrade, Studentski trg 16, 11000 Belgrade, Serbia; (T.D.); (T.J.); (P.V.)
| | - Aleksandra Mladenovic
- Department of Neurobiology, Institute for Biological Research “Sinisa Stankovic”—National Institute of Republic of Serbia, University of Belgrade, Bul.D. Stefana 142, 11000 Belgrade, Serbia
- Correspondence:
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108
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Gu J, Su C, Huang F, Zhao Y, Li J. Past, Present and Future: The Relationship Between Circular RNA and Immunity. Front Immunol 2022; 13:894707. [PMID: 35693804 PMCID: PMC9174805 DOI: 10.3389/fimmu.2022.894707] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 04/28/2022] [Indexed: 12/21/2022] Open
Abstract
The immune system has evolved since the birth of humans. However, immune-related diseases have not yet been overcome due to the lack of expected indicators and targeting specificity of current medical technology, subjecting patients to very uncomfortable physical and mental experiences and high medical costs. Therefore, the requirements for treatments with higher specificity and indicative ability are raised. Fortunately, the discovery of and continuous research investigating circular RNAs (circRNAs) represent a promising method among numerous methods. Although circRNAs wear regarded as metabolic wastes when discovered, as a type of noncoding RNA (ncRNA) with a ring structure and wide distribution range in the human body, circRNAs shine brilliantly in medical research by virtue of their special nature and structure-determined functions, such as high stability, wide distribution, high detection sensitivity, acceptable reproducibility and individual differences. Based on research investigating the role of circRNAs in immunity, we systematically discuss the hotspots of the roles of circRNAs in immune-related diseases, including expression profile analyses, potential biomarker research, ncRNA axis/network construction, impacts on phenotypes, therapeutic target seeking, maintenance of nucleic acid stability and protein binding research. In addition, we summarize the current situation of and problems associated with circRNAs in immune research, highlight the applications and prospects of circRNAs in the treatment of immune-related diseases, and provide new insight into future directions and new strategies for laboratory research and clinical applications.
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Affiliation(s)
- Junjie Gu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chongying Su
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Fei Huang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yuwei Zhao
- Chengdu Blood Center, Blood Research Laboratory, Chengdu, China
- *Correspondence: Jing Li, ; Yuwei Zhao,
| | - Jing Li
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Chinese Academy of Medical Sciences Research Unit of Oral Carcinogenesis and Management, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- *Correspondence: Jing Li, ; Yuwei Zhao,
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109
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Xia Y, Wang S, Song C, Luo R. Spatiotemporal feedforward between PKM2 tetramers and mTORC1 prompts mTORC1 activation. Phys Biol 2022; 19. [PMID: 35613602 DOI: 10.1088/1478-3975/ac7372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 05/25/2022] [Indexed: 11/11/2022]
Abstract
Most mammalian cells couple glucose availability to anabolic processes via the mTORC1 pathway. However, the mechanism by which fluctuations in glucose availability are rapidly translated into mTORC1 signals remains elusive. Here, we show that cells rapidly respond to changes in glucose availability through the spatial coupling of mTORC1 and tetramers of the key glycolytic enzyme pyruvate kinase M2 (PKM2) on lysosomal surfaces in the late G1/S phases. The lysosomal localization of PKM2 tetramers enables rapid increases in local ATP concentrations around lysosomes to activate mTORC1, while bypassing the need to elevate global ATP levels in the entire cell. In essence, this spatial coupling establishes a feedforward loop to enable mTORC1 to rapidly sense and respond to changes in glucose availability. We further demonstrate that this mechanism ensures robust cell proliferation upon fluctuating glucose availability. Thus, we present mechanistic insights into the rapid response of the mTORC1 pathway to changes in glucose availability. The underlying mechanism may be applicable to the control of other cellular processes.
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Affiliation(s)
- Yu Xia
- Fudan University, Rm A601# Life Science Building Fudan University, Yangpu, Shanghai, , Shanghai, 200433, CHINA
| | - ShuMing Wang
- Fudan University, Rm A608# Life Science Building, Fudan University, Yangpu, Shanghai, Shanghai, Shanghai, 200433, CHINA
| | - Chunbo Song
- Fudan University, #Rm 519# Life Science Building, Fudan University, Shanghai, Shanghai, 200433, CHINA
| | - Ruoyu Luo
- School of Life Science, Fudan University, 601# Rm, Building of School of Life Science, 2005#,Songhu Rd, Shanghai, Shanghai, 200433, CHINA
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110
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Wang G, Chen L, Qin S, Zhang T, Yao J, Yi Y, Deng L. Mechanistic Target of Rapamycin Complex 1: From a Nutrient Sensor to a Key Regulator of Metabolism and Health. Adv Nutr 2022; 13:1882-1900. [PMID: 35561748 PMCID: PMC9526850 DOI: 10.1093/advances/nmac055] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 04/26/2022] [Accepted: 05/09/2022] [Indexed: 01/28/2023] Open
Abstract
Mechanistic target of rapamycin complex 1 (mTORC1) is a multi-protein complex widely found in eukaryotes. It serves as a central signaling node to coordinate cell growth and metabolism by sensing diverse extracellular and intracellular inputs, including amino acid-, growth factor-, glucose-, and nucleotide-related signals. It is well documented that mTORC1 is recruited to the lysosomal surface, where it is activated and, accordingly, modulates downstream effectors involved in regulating protein, lipid, and glucose metabolism. mTORC1 is thus the central node for coordinating the storage and mobilization of nutrients and energy across various tissues. However, emerging evidence indicated that the overactivation of mTORC1 induced by nutritional disorders leads to the occurrence of a variety of metabolic diseases, including obesity and type 2 diabetes, as well as cancer, neurodegenerative disorders, and aging. That the mTORC1 pathway plays a crucial role in regulating the occurrence of metabolic diseases renders it a prime target for the development of effective therapeutic strategies. Here, we focus on recent advances in our understanding of the regulatory mechanisms underlying how mTORC1 integrates metabolic inputs as well as the role of mTORC1 in the regulation of nutritional and metabolic diseases.
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Affiliation(s)
- Guoyan Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Lei Chen
- Division of Laboratory Safety and Services, Northwest A&F University, Yangling Shaanxi, China
| | - Senlin Qin
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Tingting Zhang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi, China
| | - Junhu Yao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Yanglei Yi
- Address correspondence to YLY (e-mail: )
| | - Lu Deng
- Address correspondence to LD (e-mail: )
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111
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Ogawa T, Masumura K, Kohara Y, Kanai M, Soga T, Ohya Y, Blackwell TK, Mizunuma M. S-adenosyl-L-homocysteine extends lifespan through methionine restriction effects. Aging Cell 2022; 21:e13604. [PMID: 35388610 PMCID: PMC9124299 DOI: 10.1111/acel.13604] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/01/2022] [Accepted: 03/10/2022] [Indexed: 01/18/2023] Open
Abstract
Methionine restriction (MetR) can extend lifespan and delay the onset of aging-associated pathologies in most model organisms. Previously, we showed that supplementation with the metabolite S-adenosyl-L-homocysteine (SAH) extends lifespan and activates the energy sensor AMP-activated protein kinase (AMPK) in the budding yeast Saccharomyces cerevisiae. However, the mechanism involved and whether SAH can extend metazoan lifespan have remained unknown. Here, we show that SAH supplementation reduces Met levels and recapitulates many physiological and molecular effects of MetR. In yeast, SAH supplementation leads to inhibition of the target of rapamycin complex 1 (TORC1) and activation of autophagy. Furthermore, in Caenorhabditis elegans SAH treatment extends lifespan by activating AMPK and providing benefits of MetR. Therefore, we propose that SAH can be used as an intervention to lower intracellular Met and confer benefits of MetR.
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Affiliation(s)
- Takafumi Ogawa
- Unit of BiotechnologyGraduate School of Integrated Sciences for LifeHiroshima UniversityHigashi‐HiroshimaJapan,Hiroshima Research Center for Healthy Aging (HiHA)Hiroshima UniversityHigashi‐HiroshimaJapan,Joslin Diabetes CenterHarvard Stem Cell Institute, and Harvard Medical School Department of GeneticsBostonMassachusettsUSA
| | - Koji Masumura
- Unit of BiotechnologyGraduate School of Integrated Sciences for LifeHiroshima UniversityHigashi‐HiroshimaJapan
| | - Yuki Kohara
- Unit of BiotechnologyGraduate School of Integrated Sciences for LifeHiroshima UniversityHigashi‐HiroshimaJapan
| | - Muneyoshi Kanai
- National Research Institute of BrewingHigashi‐HiroshimaJapan
| | - Tomoyoshi Soga
- Institute for Advanced BiosciencesKeio UniversityTsuruokaJapan
| | - Yoshikazu Ohya
- Department of Integrated BiosciencesGraduate School of Frontier SciencesThe University of TokyoKashiwaJapan
| | - T. Keith Blackwell
- Joslin Diabetes CenterHarvard Stem Cell Institute, and Harvard Medical School Department of GeneticsBostonMassachusettsUSA
| | - Masaki Mizunuma
- Unit of BiotechnologyGraduate School of Integrated Sciences for LifeHiroshima UniversityHigashi‐HiroshimaJapan,Hiroshima Research Center for Healthy Aging (HiHA)Hiroshima UniversityHigashi‐HiroshimaJapan
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Zou H, Zou H, Li X, Qiu Q, Geng N, Zhang B, Yan G, Zhang Z, Zhang S, Yao B, Zhang G, Zou C. Metformin-induced AMPK activation suppresses larval growth and molting probably by disrupting 20E synthesis and glycometabolism in fall webworm, Hyphantria cunea Drury. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2022; 183:105083. [PMID: 35430073 DOI: 10.1016/j.pestbp.2022.105083] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 12/24/2021] [Accepted: 03/14/2022] [Indexed: 06/14/2023]
Abstract
Metformin, considered to be a potent AMPK activator, is widely used for clinical therapy of cancer and diabetes due to its distinct function in regulating cell energy balance and body metabolism. However, the effect of metformin-induced AMPK activation on the growth and development of insects remains largely unknown. In the present study, we focused on the role of metformin in regulating the growth and development of Hyphantria cunea, a notorious defoliator in the forestry. Firstly, we obtained the complete coding sequences of HcAMPKα2, HcAMPKβ1, HcAMPKγ2 from H. cunea, which encoded a protein of 512, 281, and 680 amino acids respectively. Furthermore, the phylogenetic analysis revealed that these three subunits were highly homologous with the AMPK subunits from other lepidopteran species. According to the bioassay, we found metformin remarkably restrained the growth and development of H. cunea larvae, and caused molting delayed and body weight reduced. In addition, expressions of HcAMPKα2, HcAMPKβ1, and HcAMPKγ2 were upregulated 3.30-, 5.93- and 5.92-folds at 24 h after treatment, confirming that metformin activated AMPK signaling at the transcriptional level in H. cunea larvae. Conversely, the expressions of two vital Halloween genes (HcCYP306A1 and HcCYP314A1) in the 20E synthesis pathway were remarkably suppressed by metformin. Thus, we presumed that metformin delayed larval molting probably by impeding 20E synthesis in the H. cunea larvae. Finally, we found that metformin accelerated glycogen breakdown, elevated in vivo trehalose level, promoted chitin synthesis, and upregulated transcriptions of the genes in chitin synthesis pathway. Taken together, the findings provide a new insight into the molecular mechanisms by which AMPK regulates carbohydrate metabolism and chitin synthesis in insects.
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Affiliation(s)
- Haifeng Zou
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Hang Zou
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Xingpeng Li
- School of Forestry, Beihua University, Jilin 132013, PR China
| | - Qian Qiu
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Nannan Geng
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Bihan Zhang
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Gaige Yan
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Zhidong Zhang
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Shengyu Zhang
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Bin Yao
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China
| | - Guocai Zhang
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China.
| | - Chuanshan Zou
- School of Forestry, Northeast Forestry University, Harbin 150040, PR China.
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113
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Li Q, Sun Q, Wang D, Liu Y, Zhang P, Lu H, Zhang Y, Zhang S, Wang A, Ding X, Xiao J. Quantitative phosphoproteomics reveals the role of wild soybean GsSnRK1 as a metabolic regulator under drought and alkali stresses. J Proteomics 2022; 258:104528. [PMID: 35182787 DOI: 10.1016/j.jprot.2022.104528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/04/2022] [Accepted: 02/04/2022] [Indexed: 11/25/2022]
Abstract
Drought and alkali stresses cause detrimental effects on plant growth and development. SnRK1 protein kinases act as key energy and stress sensors by phosphorylation-mediated signaling in the regulation of plant defense reactions against adverse environments. To understand SnRK1-dependent phosphorylation events in signaling pathways triggered by abiotic factors, we employed quantitative phosphoproteomics to compare the global changes in phosphopeptides and phosphoproteins in 2kinm mutant Arabidopsis (SnRK1.1 T-DNA knockout and SnRK1.2 knockdown by β-estradiol-induced RNAi) complemented with wild soybean GsSnRK1(wt) or dominant negative mutant GsSnRK1(K49M) in response to drought and alkali stresses. Among 4014 phosphopeptides (representing 2380 phosphoproteins) identified in this study, we finalized 74 phosphopeptides (representing 61 phosphoproteins), and 75 phosphopeptides (representing 57 phosphoproteins) showing significant changes in phosphorylation levels under drought and alkali treatments respectively. Function enrichment and protein-protein interaction analyses indicated that the differentially-expressed phosphoproteins (DPs) under drought and alkali stresses were mainly involved in signaling transduction, stress response, carbohydrate and energy metabolism, transport and membrane trafficking, RNA splicing and processing, DNA binding and gene expression, and protein synthesis/folding/degradation. These results provide assistance to identify bona fide and novel SnRK1 phosphorylation substrates and shed new light on the biological functions of SnRK1 kinase in responses to abiotic stresses. SIGNIFICANCE: These results provide assistance to identify novel SnRK1 phosphorylation substrates and regulatory proteins, and shed new light on investigating the potential roles of reversible phosphorylation in plant responses to abiotic stresses.
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Affiliation(s)
- Qiang Li
- Key Laboratory of Soybean Biology of Chinese Education Ministry, Harbin 150030, China; Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin 150030, China
| | - Qi Sun
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin 150030, China
| | - Di Wang
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin 150030, China
| | - Yuanming Liu
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin 150030, China
| | - Pengmin Zhang
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin 150030, China
| | - Haoran Lu
- Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin 150030, China
| | - Yao Zhang
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China
| | - Shuzhen Zhang
- Key Laboratory of Soybean Biology of Chinese Education Ministry, Harbin 150030, China
| | - Aoxue Wang
- College of Life Sciences, Northeast Agricultural University, Harbin 150030, China; College of Horticulture and Landscape Architecture, Northeast Agricultural University, Harbin 150030, China.
| | - Xiaodong Ding
- Key Laboratory of Soybean Biology of Chinese Education Ministry, Harbin 150030, China; Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin 150030, China.
| | - Jialei Xiao
- Key Laboratory of Soybean Biology of Chinese Education Ministry, Harbin 150030, China; Key Laboratory of Agricultural Biological Functional Genes, Northeast Agricultural University, Harbin 150030, China.
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114
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Yang J, Xu R, Luan Y, Fan H, Yang S, Liu J, Zeng H, Shao L. Rapamycin Ameliorates Radiation-Induced Testis Damage in Mice. Front Cell Dev Biol 2022; 10:783884. [PMID: 35547814 PMCID: PMC9081527 DOI: 10.3389/fcell.2022.783884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 04/04/2022] [Indexed: 11/13/2022] Open
Abstract
Male infertility is an important problem in human and animal reproduction. The testis is the core of male reproduction, which is very sensitive to radiation. The decline of male reproductive ability is a common trend in the world. Radiation is a physical factor leading to abnormal male reproductive function. To investigate the potential mechanisms of testicular damage induced by radiation and explore effective strategies to alleviate radiation-induced testis injury, C57BL/6 mice were irradiated with 8.0 Gy of X-ray irradiation. Testis and epididymis were collected at days 1, 3, and 7 after radiation exposure to analyze spermatogonia and sperm function. The results showed that radiation significantly destroyed testicular structure and reduced the numbers of spermatogonia. These were associated with mTORC1 signaling activation, decreased cellular proliferation and increased apoptotic cells in the irradiated testis. Rapamycin significantly blocked mTORC1 signaling pathway in the irradiated testis. Inhibition of mTORC1 signaling pathway by rapamycin treatment after radiation could significantly improve cell proliferation in testis and alleviate radiation-induced testicular injury after radiation exposure. Rapamycin treatment benefited cell survival in testis to maintain spermatogenesis cycle at 35 days after irradiation. These findings imply that rapamycin treatment can accelerate testis recovery under radiation condition through inhibiting mTORC1 signaling pathway.
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Affiliation(s)
- Juan Yang
- School of Public Health, Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, China
| | - Rui Xu
- Department of Blood Transfusion, Affiliated Hospital of Chengde Medical College, Chengde, China
- School of Basic Medicine, Nanchang University, Nanchang, China
| | - Yingying Luan
- School of Basic Medicine, Nanchang University, Nanchang, China
| | - Hancheng Fan
- School of Basic Medicine, Nanchang University, Nanchang, China
| | - Shuo Yang
- School of Public Health, Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, China
| | - Jun Liu
- The Department of Urology, Huashan Hospital, Fudan University, Shanghai, China
| | - Huihong Zeng
- School of Basic Medicine, Nanchang University, Nanchang, China
| | - Lijian Shao
- School of Public Health, Jiangxi Provincial Key Laboratory of Preventive Medicine, Nanchang University, Nanchang, China
- *Correspondence: Lijian Shao,
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115
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Kawamura T, Takehora Y, Hori N, Takakura Y, Yamaguchi N, Takano H, Yamaguchi N. VGLL3 increases the dependency of cancer cells on de novo nucleotide synthesis through GART expression. J Cell Biochem 2022; 123:1064-1076. [DOI: 10.1002/jcb.30251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 03/16/2022] [Accepted: 03/22/2022] [Indexed: 11/10/2022]
Affiliation(s)
- Tomohiro Kawamura
- Department of Molecular Cardiovascular Pharmacology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
| | - Yuki Takehora
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
| | - Naoto Hori
- Department of Molecular Cardiovascular Pharmacology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
| | - Yuki Takakura
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
| | - Naoto Yamaguchi
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
| | - Hiroyuki Takano
- Department of Molecular Cardiovascular Pharmacology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
| | - Noritaka Yamaguchi
- Department of Molecular Cardiovascular Pharmacology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
- Laboratory of Molecular Cell Biology, Graduate School of Pharmaceutical Sciences Chiba University Chiba Japan
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Quantitative phosphoproteomic analyses identify STK11IP as a lysosome-specific substrate of mTORC1 that regulates lysosomal acidification. Nat Commun 2022; 13:1760. [PMID: 35365663 PMCID: PMC8976005 DOI: 10.1038/s41467-022-29461-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 03/14/2022] [Indexed: 01/02/2023] Open
Abstract
The evolutionarily conserved serine/threonine kinase mTORC1 is a central regulator of cell growth and proliferation. mTORC1 is activated on the lysosome surface. However, once mTORC1 is activated, it is unclear whether mTORC1 phosphorylates local lysosomal proteins to regulate specific aspects of lysosomal biology. Through cross-reference analyses of the lysosome proteome with the mTORC1-regulated phosphoproteome, we identify STK11IP as a lysosome-specific substrate of mTORC1. mTORC1 phosphorylates STK11IP at Ser404. Knockout of STK11IP leads to a robust increase of autophagy flux. Dephosphorylation of STK11IP at Ser404 represses the role of STK11IP as an autophagy inhibitor. Mechanistically, STK11IP binds to V-ATPase, and regulates the activity of V-ATPase. Knockout of STK11IP protects mice from fasting or Methionine/Choline-Deficient Diet (MCD)-induced fatty liver. Thus, our study demonstrates that STK11IP phosphorylation represents a mechanism for mTORC1 to regulate lysosomal acidification and autophagy, and points to STK11IP as a promising therapeutic target for the amelioration of diseases with aberrant autophagy signaling.
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117
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Huang WQ, Zou Y, Tian Y, Ma XF, Zhou QY, Li ZY, Gong SX, Wang AP. Mammalian Target of Rapamycin as the Therapeutic Target of Vascular Proliferative Diseases: Past, Present, and Future. J Cardiovasc Pharmacol 2022; 79:444-455. [PMID: 34983907 DOI: 10.1097/fjc.0000000000001208] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 12/16/2021] [Indexed: 11/26/2022]
Abstract
ABSTRACT The abnormal proliferation of vascular smooth muscle cells (VSMCs) is a key pathological characteristic of vascular proliferative diseases. Mammalian target of rapamycin (mTOR) is an evolutionarily conserved serine/threonine kinase that plays an important role in regulating cell growth, motility, proliferation, and survival, as well as gene expression in response to hypoxia, growth factors, and nutrients. Increasing evidence shows that mTOR also regulates VSMC proliferation in vascular proliferative diseases and that mTOR inhibitors, such as rapamycin, effectively restrain VSMC proliferation. However, the molecular mechanisms linking mTOR to vascular proliferative diseases remain elusive. In our review, we summarize the key roles of the mTOR and the recent discoveries in vascular proliferative diseases, focusing on the therapeutic potential of mTOR inhibitors to target the mTOR signaling pathway for the treatment of vascular proliferative diseases. In this study, we discuss mTOR inhibitors as promising candidates to prevent VSMC-associated vascular proliferative diseases.
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Affiliation(s)
- Wen-Qian Huang
- Institute of Clinical Research, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
| | - Yan Zou
- Department of Hand and Foot Surgery, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China ; and
| | - Ying Tian
- Institute of Clinical Research, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
| | - Xiao-Feng Ma
- Institute of Clinical Research, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
| | - Qin-Yi Zhou
- Institute of Clinical Research, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
| | - Zhen-Yu Li
- Institute of Clinical Research, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
| | - Shao-Xin Gong
- Department of Pathology, First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
| | - Ai-Ping Wang
- Institute of Clinical Research, Affiliated Nanhua Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
- Department of Physiology, Institute of Neuroscience Research, Hengyang Key Laboratory of Neurodegeneration and Cognitive Impairment, Hengyang Medical School, University of South China, Hengyang, Hunan, PR China
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118
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Artins A, Caldana C. The metabolic homeostaTOR: The balance of holding on or letting grow. CURRENT OPINION IN PLANT BIOLOGY 2022; 66:102196. [PMID: 35219142 DOI: 10.1016/j.pbi.2022.102196] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Revised: 01/18/2022] [Accepted: 01/23/2022] [Indexed: 06/14/2023]
Abstract
Plants, as autotrophic organisms, capture light energy to convert carbon dioxide into ATP, NADPH, and sugars, which are essential for the biosynthesis of building blocks, cell proliferation, biomass accumulation, and reproductive fitness. The Target Of Rapamycin (TOR) signalling pathway is a master regulator in sensing energy and nutrients, adapting the metabolic network and cell behaviour in response to environmental resource availability. In the past years, exciting advances in this endeavour have pointed out this pathway's importance in controlling metabolic homeostasis in various biological processes and systems. In this review, we discuss these recent discoveries highlighting the need for a metabolic threshold for the proper function of this kinase complex at the cellular level and across distinct tissues and organs to control growth and development in plants.
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Affiliation(s)
- Anthony Artins
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany
| | - Camila Caldana
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476, Potsdam-Golm, Germany.
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Senko AN, Overall RW, Silhavy J, Mlejnek P, Malínská H, Hüttl M, Marková I, Fabel KS, Lu L, Stuchlik A, Williams RW, Pravenec M, Kempermann G. Systems genetics in the rat HXB/BXH family identifies Tti2 as a pleiotropic quantitative trait gene for adult hippocampal neurogenesis and serum glucose. PLoS Genet 2022; 18:e1009638. [PMID: 35377872 PMCID: PMC9060359 DOI: 10.1371/journal.pgen.1009638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 05/02/2022] [Accepted: 03/07/2022] [Indexed: 11/19/2022] Open
Abstract
Neurogenesis in the adult hippocampus contributes to learning and memory in the healthy brain but is dysregulated in metabolic and neurodegenerative diseases. The molecular relationships between neural stem cell activity, adult neurogenesis, and global metabolism are largely unknown. Here we applied unbiased systems genetics methods to quantify genetic covariation among adult neurogenesis and metabolic phenotypes in peripheral tissues of a genetically diverse family of rat strains, derived from a cross between the spontaneously hypertensive (SHR/OlaIpcv) strain and Brown Norway (BN-Lx/Cub). The HXB/BXH family is a very well established model to dissect genetic variants that modulate metabolic and cardiovascular diseases and we have accumulated deep phenome and transcriptome data in a FAIR-compliant resource for systematic and integrative analyses. Here we measured rates of precursor cell proliferation, survival of new neurons, and gene expression in the hippocampus of the entire HXB/BXH family, including both parents. These data were combined with published metabolic phenotypes to detect a neurometabolic quantitative trait locus (QTL) for serum glucose and neuronal survival on Chromosome 16: 62.1-66.3 Mb. We subsequently fine-mapped the key phenotype to a locus that includes the Telo2-interacting protein 2 gene (Tti2)-a chaperone that modulates the activity and stability of PIKK kinases. To verify the hypothesis that differences in neurogenesis and glucose levels are caused by a polymorphism in Tti2, we generated a targeted frameshift mutation on the SHR/OlaIpcv background. Heterozygous SHR-Tti2+/- mutants had lower rates of hippocampal neurogenesis and hallmarks of dysglycemia compared to wild-type littermates. Our findings highlight Tti2 as a causal genetic link between glucose metabolism and structural brain plasticity. In humans, more than 800 genomic variants are linked to TTI2 expression, seven of which have associations to protein and blood stem cell factor concentrations, blood pressure and frontotemporal dementia.
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Affiliation(s)
- Anna N. Senko
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Germany
- CRTD–Center for Regenerative Therapies Dresden, Technische Universität Dresden, Germany
| | - Rupert W. Overall
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Germany
- CRTD–Center for Regenerative Therapies Dresden, Technische Universität Dresden, Germany
| | - Jan Silhavy
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Petr Mlejnek
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Hana Malínská
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Martina Hüttl
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Irena Marková
- Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Klaus S. Fabel
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Germany
- CRTD–Center for Regenerative Therapies Dresden, Technische Universität Dresden, Germany
| | - Lu Lu
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Ales Stuchlik
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Robert W. Williams
- Department of Genetics, Genomics and Informatics, University of Tennessee Health Science Center, Memphis, Tennessee, United States of America
| | - Michal Pravenec
- Institute of Physiology of the Czech Academy of Sciences, Prague, Czech Republic
| | - Gerd Kempermann
- German Center for Neurodegenerative Diseases (DZNE) Dresden, Germany
- CRTD–Center for Regenerative Therapies Dresden, Technische Universität Dresden, Germany
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Shan J, Wang Z, Mo Q, Long J, Fan Y, Cheng L, Zhang T, Liu X, Wang X. Ribonucleotide reductase M2 subunit silencing suppresses tumorigenesis in pancreatic cancer via inactivation of PI3K/AKT/mTOR pathway. Pancreatology 2022; 22:401-413. [PMID: 35300916 DOI: 10.1016/j.pan.2022.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 02/26/2022] [Accepted: 03/02/2022] [Indexed: 12/11/2022]
Abstract
BACKGROUND/OBJECTIVES Ribonucleotide Reductase M2 subunit (RRM2) is elevated in pancreatic cancer and involved in DNA synthesis and cell proliferation. But its specific mechanism including genetic differences and upstream regulatory pathways remains unclear. METHODS We analyzed RRM2 expression of 178 pancreatic cancer patients in Gene Expression Profiling Interactive Analysis (GEPIA) database. Besides, more pancreatic cancer specimens were collected and detected RRM2 expression by immunohistochemistry. RRM2 knockdown by shRNA was applied for functional and mechanism analysis in vitro. Xenograft tumor growth was significantly slower by RRM2 silencing in vivo. RESULTS It showed that high RRM2 expression had a poorer overall survival and disease free survival. RRM2 expression was higher in tumor grade 2 and 3 than grade 1. Immunohistochemistry data validated that high RRM2 expression predicted worse survival. RRM2 knockdown significantly reduced cell proliferation, inhibited colony formation and suppressed cell cycle progress. Further mechanism assay showed silencing RRM2 lead to inactivation of PI3K/AKT/mTOR pathway and inhibition of mutant p53, which induce S phase arrest and/or apoptosis. In panc-1 cells, S-phase arrest mediated by mutant p53 inhibition, p21 increase and cell cycle related proteins change. While in miapaca-2 cells, induction of apoptosis and S-phase arrest mediated by CDK1 played a coordinated role. CONCLUSION Taken together, high RRM2 expression was associated with worse prognosis. Importantly, RRM2 knockdown deactivated PI3K/AKT/mTOR pathway, resulting in cell cycle arrest and/or apoptosis. This study shed light on the molecular mechanism of RRM2 in pancreatic tumor progression and is expected to provide a new theoretical basis for pancreatic cancer treatment.
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Affiliation(s)
- Jinlan Shan
- Department of Surgery, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China; Department of Cancer Institute, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zhen Wang
- Department of Breast Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Qiuping Mo
- Department of Breast Surgery, Zhejiang Provincial People's Hospital, Hangzhou, Zhejiang, China
| | - Jingpei Long
- Department of Surgery, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yangfan Fan
- Department of Surgery, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Lu Cheng
- Department of Pathology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Tao Zhang
- Department of Breast and Thyroid Surgery, Affiliated Hospital of Shaoxing University, Shaoxing, Zhejiang, China
| | - Xiyong Liu
- Sino-America Cancer Foundation, California Cancer Institute, Temple City, CA91780, USA; Tumor Biomarker Development, California Cancer Institute, Temple City, CA,91780, USA
| | - Xiaochen Wang
- Department of Breast Surgery and Oncology, Key Laboratory of Cancer Prevention and Intervention, Ministry of Education, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
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Hsu FY, Liou JY, Tang FY, Sou NL, Peng JH, Chiang EPI. Ketogenic Diet Consumption Inhibited Mitochondrial One-Carbon Metabolism. Int J Mol Sci 2022; 23:ijms23073650. [PMID: 35409009 PMCID: PMC8998878 DOI: 10.3390/ijms23073650] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/01/2022] [Accepted: 03/04/2022] [Indexed: 11/17/2022] Open
Abstract
Given the popularity of ketogenic diets, their potential long-term consequences deserve to be more carefully monitored. Mitochondrially derived formate has a critical role in mammalian one-carbon (1C) metabolism and development. The glycine cleavage system (GCS) accounts for another substantial source for mitochondrially derived 1C units. Objective: We investigated how the ketogenic state modulates mitochondrial formate generation and partitioning of 1C metabolic fluxes. Design: HepG2 cells treated with physiological doses (1 mM and 10 mM) of β-hydroxybutyrate (βHB) were utilized as the in vitro ketogenic model. Eight-week male C57BL/6JNarl mice received either a medium-chain fatty-acid-enriched ketogenic diet (MCT-KD) or a control diet AIN 93M for 8 weeks. Stable isotopic labeling experiments were conducted. Results and Conclusions: MCT-KD is effective in weight and fat loss. Deoxythymidine (dTMP) synthesis from the mitochondrial GCS-derived formate was significantly suppressed by βHB and consumption of MCT-KD. Consistently, plasma formate concentrations, as well as the metabolic fluxes from serine and glycine, were suppressed by MCT-KD. MCT-KD also decreased the fractional contribution of mitochondrially derived formate in methionine synthesis from serine. With the worldwide application, people and medical professionals should be more aware of the potential metabolic perturbations when practicing a long-term ketogenic diet.
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Affiliation(s)
- Fan-Yu Hsu
- Department of Food Science and Biotechnology, National Chung Hsing University, Taichung 402, Taiwan; (F.-Y.H.); (J.-Y.L.); (N.-L.S.); (J.-H.P.)
| | - Jia-Ying Liou
- Department of Food Science and Biotechnology, National Chung Hsing University, Taichung 402, Taiwan; (F.-Y.H.); (J.-Y.L.); (N.-L.S.); (J.-H.P.)
| | - Feng-Yao Tang
- Biomedical Science Laboratory, Department of Nutrition, China Medical University, Taichung 402, Taiwan;
| | - Nga-Lai Sou
- Department of Food Science and Biotechnology, National Chung Hsing University, Taichung 402, Taiwan; (F.-Y.H.); (J.-Y.L.); (N.-L.S.); (J.-H.P.)
- Innovation and Development Center of Sustainable Agriculture (IDCSA), National Chung Hsing University, Taichung 402, Taiwan
| | - Jian-Hau Peng
- Department of Food Science and Biotechnology, National Chung Hsing University, Taichung 402, Taiwan; (F.-Y.H.); (J.-Y.L.); (N.-L.S.); (J.-H.P.)
- Innovation and Development Center of Sustainable Agriculture (IDCSA), National Chung Hsing University, Taichung 402, Taiwan
- Ph.D. Program in Microbial Genomics, National Chung Hsing University, Taichung 402, Taiwan
| | - En-Pei Isabel Chiang
- Department of Food Science and Biotechnology, National Chung Hsing University, Taichung 402, Taiwan; (F.-Y.H.); (J.-Y.L.); (N.-L.S.); (J.-H.P.)
- Innovation and Development Center of Sustainable Agriculture (IDCSA), National Chung Hsing University, Taichung 402, Taiwan
- Ph.D. Program in Microbial Genomics, National Chung Hsing University, Taichung 402, Taiwan
- Correspondence: ; Tel.: +886-4-22853049
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Shanak S, Bassalat N, Barghash A, Kadan S, Ardah M, Zaid H. Drug Discovery of Plausible Lead Natural Compounds That Target the Insulin Signaling Pathway: Bioinformatics Approaches. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2022; 2022:2832889. [PMID: 35356248 PMCID: PMC8958086 DOI: 10.1155/2022/2832889] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 01/16/2022] [Accepted: 02/09/2022] [Indexed: 12/11/2022]
Abstract
The growing smooth talk in the field of natural compounds is due to the ancient and current interest in herbal medicine and their potentially positive effects on health. Dozens of antidiabetic natural compounds were reported and tested in vivo, in silico, and in vitro. The role of these natural compounds, their actions on the insulin signaling pathway, and the stimulation of the glucose transporter-4 (GLUT4) insulin-responsive translocation to the plasma membrane (PM) are all crucial in the treatment of diabetes and insulin resistance. In this review, we collected and summarized a group of available in vivo and in vitro studies which targeted isolated phytochemicals with possible antidiabetic activity. Moreover, the in silico docking of natural compounds with some of the insulin signaling cascade key proteins is also summarized based on the current literature. In this review, hundreds of recent studies on pure natural compounds that alleviate type II diabetes mellitus (type II DM) were revised. We focused on natural compounds that could potentially regulate blood glucose and stimulate GLUT4 translocation through the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) pathway. On attempt to point out potential new natural antidiabetic compounds, this review also focuses on natural ingredients that were shown to interact with proteins in the insulin signaling pathway in silico, regardless of their in vitro/in vivo antidiabetic activity. We invite interested researchers to test these compounds as potential novel type II DM drugs and explore their therapeutic mechanisms.
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Affiliation(s)
- Siba Shanak
- Faculty of Sciences, Arab American University, P.O Box 240, Jenin, State of Palestine
| | - Najlaa Bassalat
- Faculty of Sciences, Arab American University, P.O Box 240, Jenin, State of Palestine
- Faculty of Medicine, Arab American University, P.O Box 240, Jenin, State of Palestine
| | - Ahmad Barghash
- Computer Science Department, German Jordanian University, Madaba Street. P.O. Box 35247, Amman 11180, Jordan
| | - Sleman Kadan
- Qasemi Research Center, Al-Qasemi Academic College, P.O Box 124, Baqa El-Gharbia 30100, Israel
| | - Mahmoud Ardah
- Faculty of Sciences, Arab American University, P.O Box 240, Jenin, State of Palestine
| | - Hilal Zaid
- Faculty of Medicine, Arab American University, P.O Box 240, Jenin, State of Palestine
- Qasemi Research Center, Al-Qasemi Academic College, P.O Box 124, Baqa El-Gharbia 30100, Israel
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123
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Villa-González M, Martín-López G, Pérez-Álvarez MJ. Dysregulation of mTOR Signaling after Brain Ischemia. Int J Mol Sci 2022; 23:ijms23052814. [PMID: 35269956 PMCID: PMC8911477 DOI: 10.3390/ijms23052814] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/28/2022] [Accepted: 03/01/2022] [Indexed: 02/04/2023] Open
Abstract
In this review, we provide recent data on the role of mTOR kinase in the brain under physiological conditions and after damage, with a particular focus on cerebral ischemia. We cover the upstream and downstream pathways that regulate the activation state of mTOR complexes. Furthermore, we summarize recent advances in our understanding of mTORC1 and mTORC2 status in ischemia–hypoxia at tissue and cellular levels and analyze the existing evidence related to two types of neural cells, namely glia and neurons. Finally, we discuss the potential use of mTORC1 and mTORC2 as therapeutic targets after stroke.
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Affiliation(s)
- Mario Villa-González
- Departamento de Biología (Fisiología Animal), Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (M.V.-G.); (G.M.-L.)
- Centro de Biología Molecular “Severo Ochoa” (CBMSO), Universidad Autónoma de Madrid/CSIC, 28049 Madrid, Spain
| | - Gerardo Martín-López
- Departamento de Biología (Fisiología Animal), Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (M.V.-G.); (G.M.-L.)
| | - María José Pérez-Álvarez
- Departamento de Biología (Fisiología Animal), Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain; (M.V.-G.); (G.M.-L.)
- Centro de Biología Molecular “Severo Ochoa” (CBMSO), Universidad Autónoma de Madrid/CSIC, 28049 Madrid, Spain
- Correspondence: ; Tel.: +34-91-497-2819
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Yang S, Zhang J, Chen D, Cao J, Zheng Y, Han Y, Jin Y, Wang S, Wang T, Ma L, Luo T, Wang Y, Qin W, Dong L. CARM1 promotes gastric cancer progression by regulating TFE3 mediated autophagy enhancement through the cytoplasmic AMPK-mTOR and nuclear AMPK-CARM1-TFE3 signaling pathways. Cancer Cell Int 2022; 22:102. [PMID: 35246137 PMCID: PMC8895580 DOI: 10.1186/s12935-022-02522-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 02/10/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The role of CARM1 in tumors is inconsistent. It acts as an oncogene in most cancers but it inhibits the progression of liver and pancreatic cancers. CARM1 has recently been reported to regulate autophagy, but this function is also context-dependent. However, the effect of CARM1 on gastric cancer (GC) has not been studied. We aimed to explore whether CARM1 was involved in the progression of GC by regulating autophagy. METHODS The clinical values of CARM1 and autophagy in GC were evaluated by immunohistochemistry and qRT-PCR. Transmission electron microscopy, immunofluorescence and western blotting were employed to identify autophagy. The role of CARM1 in GC was investigated by CCK-8, colony formation and flow cytometry assays in vitro and a xenograft model in vivo. Immunoprecipitation assays were performed to determine the interaction of CARM1 and TFE3. RESULTS CARM1 was upregulated in clinical GC tissues and cell lines, and higher CARM1 expression predicted worse prognosis. CARM1 enhanced GC cell proliferation, facilitated G1-S transition and inhibited ER stress-induced apoptosis by regulating autophagy. Importantly, treatment with a CARM1 inhibitor rescued the tumor-promoting effects of CARM1 both in vitro and in vivo. Furthermore, we demonstrated that CARM1 promoted TFE3 nuclear translocation to induce autophagy through the cytoplasmic AMPK-mTOR and nuclear AMPK-CARM1-TFE3 signaling pathways. CONCLUSION CARM1 promoted GC cell proliferation, accelerated G1-S transition and reduced ER stress-induced apoptosis by regulating autophagy. Mechanistically, CARM1 triggered autophagy by facilitating TFE3 nuclear translocation through the AMPK-mTOR and AMPK-CARM1-TFE3 signaling pathways.
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Affiliation(s)
- Suzhen Yang
- Department of Digestive Disease and Gastrointestinal Motility Research Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China.,State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Clinical Research Center for Oral Diseases, Department of Orthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, People's Republic of China
| | - Jing Zhang
- Department of Kidney Transplantation, Nephropathy Hospital, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, People's Republic of China
| | - Di Chen
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Air Force Military Medical University, Xi'an, 710032, People's Republic of China
| | - Jiayi Cao
- Faculty of Life Science, Northwest University, 229 Taibai North Road, Xi'an, 710069, Shaanxi Province, People's Republic of China
| | - Ying Zheng
- Department of Digestive Disease and Gastrointestinal Motility Research Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Yuying Han
- Faculty of Life Science, Northwest University, 229 Taibai North Road, Xi'an, 710069, Shaanxi Province, People's Republic of China
| | - Yirong Jin
- State Key Laboratory of Cancer Biology, National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases, Air Force Military Medical University, Xi'an, 710032, People's Republic of China
| | - Shuhui Wang
- Department of Infectious Diseases, Shenzhen Shekou People's Hospital, Shenzhen, 518067, People's Republic of China
| | - Ting Wang
- Department of Digestive Disease and Gastrointestinal Motility Research Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Lin Ma
- Shaanxi Provincial People's Hospital, Xi'an, 710043, Shaanxi, People's Republic of China
| | - Tingting Luo
- Faculty of Life Science, Northwest University, 229 Taibai North Road, Xi'an, 710069, Shaanxi Province, People's Republic of China
| | - Yan Wang
- Department of Digestive Disease and Gastrointestinal Motility Research Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China.
| | - Wen Qin
- State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Clinical Research Center for Oral Diseases, Department of Orthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, People's Republic of China.
| | - Lei Dong
- Department of Digestive Disease and Gastrointestinal Motility Research Room, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, People's Republic of China.
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125
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Yamada C, Morooka A, Miyazaki S, Nagai M, Mase S, Iemura K, Tasnin MN, Takuma T, Nakamura S, Morshed S, Koike N, Mostofa MG, Rahman MA, Sharmin T, Katsuta H, Ohara K, Tanaka K, Ushimaru T. TORC1 inactivation promotes APC/C-dependent mitotic slippage in yeast and human cells. iScience 2022; 25:103675. [PMID: 35141499 PMCID: PMC8814761 DOI: 10.1016/j.isci.2021.103675] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 10/20/2021] [Accepted: 12/20/2021] [Indexed: 12/31/2022] Open
Abstract
Unsatisfied kinetochore-microtubule attachment activates the spindle assembly checkpoint to inhibit the metaphase-anaphase transition. However, some cells eventually override mitotic arrest by mitotic slippage. Here, we show that inactivation of TORC1 kinase elicits mitotic slippage in budding yeast and human cells. Yeast mitotic slippage was accompanied with aberrant aspects, such as degradation of the nucleolar protein Net1, release of phosphatase Cdc14, and anaphase-promoting complex/cyclosome (APC/C)-Cdh1-dependent degradation of securin and cyclin B in metaphase. This mitotic slippage caused chromosome instability. In human cells, mammalian TORC1 (mTORC1) inactivation also invoked mitotic slippage, indicating that TORC1 inactivation-induced mitotic slippage is conserved from yeast to mammalian cells. However, the invoked mitotic slippage in human cells was not dependent on APC/C-Cdh1. This study revealed an unexpected involvement of TORC1 in mitosis and provides information on undesirable side effects of the use of TORC1 inhibitors as immunosuppressants and anti-tumor drugs. Yeast TORC1 inhibition promotes Net1 degradation and Cdc14 release Yeast TORC1 inhibition invokes mitotic slippage in an APC/C-Cdh1-dependent manner Human mTORC1 inhibition also elicits mitotic slippage
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Affiliation(s)
- Chihiro Yamada
- Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka 422-8021, Japan
| | - Aya Morooka
- Department of Biological Science, Faculty of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Seira Miyazaki
- Department of Biological Science, Faculty of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Masayoshi Nagai
- Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka 422-8021, Japan.,Department of Molecular Oncology, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
| | - Satoru Mase
- Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka 422-8021, Japan
| | - Kenji Iemura
- Department of Molecular Oncology, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
| | - Most Naoshia Tasnin
- Graduate School of Science and Technology, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8021, Japan
| | - Tsuneyuki Takuma
- Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka 422-8021, Japan
| | - Shotaro Nakamura
- Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka 422-8021, Japan
| | - Shamsul Morshed
- Graduate School of Science and Technology, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8021, Japan
| | - Naoki Koike
- Graduate School of Science and Technology, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8021, Japan
| | - Md Golam Mostofa
- Graduate School of Science and Technology, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8021, Japan
| | - Muhammad Arifur Rahman
- Graduate School of Science and Technology, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8021, Japan
| | - Tasnuva Sharmin
- Graduate School of Science and Technology, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8021, Japan
| | - Haruko Katsuta
- Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka 422-8021, Japan
| | - Kotaro Ohara
- Department of Biological Science, Faculty of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan
| | - Kozo Tanaka
- Department of Molecular Oncology, Institute of Development, Aging and Cancer, Tohoku University, 4-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan
| | - Takashi Ushimaru
- Department of Science, Graduate School of Integrated Science and Technology, Shizuoka University, Shizuoka 422-8021, Japan.,Department of Biological Science, Faculty of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka 422-8529, Japan.,Graduate School of Science and Technology, Shizuoka University, Ohya 836, Suruga-ku, Shizuoka 422-8021, Japan
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126
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Song Z, Yang Y, Wu Y, Zheng M, Sun D, Li H, Chen L. Glutamic oxaloacetic transaminase 1 as a potential target in human cancer. Eur J Pharmacol 2022; 917:174754. [PMID: 35007521 DOI: 10.1016/j.ejphar.2022.174754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 12/08/2021] [Accepted: 01/06/2022] [Indexed: 12/31/2022]
Abstract
Glutamic Oxaloacetic Transaminase 1 (GOT1) is one distinct isoenzyme of glutamic oxaloacetic transaminase in eukaryotic cells, which is located in the cytoplasm. To date, several studies have shown that GOT1 plays a critical role in regulating cell proliferation by participating in amino acid metabolism, especially in glutamine metabolism. In addition, GOT1 is overexpressed in many cancer, so GOT1 has been identified as a potentially therapeutic target. Herein, this review summarizes the structure and function of GOT1 and the important roles of GOT1 in some tumor progress, as well as the characterization of GOT1 inhibitors. It may provide new insight into the discovery of small compounds as potential anti-GOT1 drugs for treatment of cancer.
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Affiliation(s)
- Zhuorui Song
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yueying Yang
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yanli Wu
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Mengzhu Zheng
- Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Dejuan Sun
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China.
| | - Hua Li
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China; Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Lixia Chen
- Wuya College of Innovation, Key Laboratory of Structure-Based Drug Design & Discovery, Ministry of Education, Shenyang Pharmaceutical University, Shenyang, 110016, China.
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127
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Cohen A, Pataki E, Kupiec M, Weisman R. TOR complex 2 contributes to regulation of gene expression via inhibiting Gcn5 recruitment to subtelomeric and DNA replication stress genes. PLoS Genet 2022; 18:e1010061. [PMID: 35157728 PMCID: PMC8880919 DOI: 10.1371/journal.pgen.1010061] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 02/25/2022] [Accepted: 01/28/2022] [Indexed: 11/18/2022] Open
Abstract
The fission yeast TOR complex 2 (TORC2) is required for gene silencing at subtelomeric regions and for the induction of gene transcription in response to DNA replication stress. Thus, TORC2 affects transcription regulation both negatively and positively. Whether these two TORC2-dependent functions share a common molecular mechanism is currently unknown. Here, we show that Gad8 physically interacts with proteins that regulate transcription, including subunits of the Spt-Ada-Gcn5-acetyltransferase (SAGA) complex and the BET bromodomain protein Bdf2. We demonstrate that in the absence of TORC2, Gcn5, the histone acetyltransferase subunit of SAGA, accumulates at subtelomeric genes and at non-induced promoters of DNA replication genes. Remarkably, the loss of Gcn5 in TORC2 mutant cells restores gene silencing as well as transcriptional induction in response to DNA replication stress. Loss of Bdf2 alleviates excess of Gcn5 binding in TORC2 mutant cells and also rescues the aberrant regulation of transcription in these cells. Furthermore, the loss of either SAGA or Bdf2 suppresses the sensitivity of TORC2 mutant cells to a variety of stresses, including DNA replication, DNA damage, temperature and nutrient stresses. We suggest a role of TORC2 in transcriptional regulation that is critical for gene silencing and gene induction in response to stress and involves the binding of Gcn5 to the chromatin.
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Affiliation(s)
- Adiel Cohen
- Department of Natural and Life Sciences, The Open University of Israel, Ra’anana, Israel
| | - Emese Pataki
- Department of Natural and Life Sciences, The Open University of Israel, Ra’anana, Israel
| | - Martin Kupiec
- The Shmunis School of Biomedicine & Cancer Research, Tel Aviv University, Tel Aviv, Israel
| | - Ronit Weisman
- Department of Natural and Life Sciences, The Open University of Israel, Ra’anana, Israel
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Hassan A, Khalaily N, Kilav-Levin R, Nechama M, Volovelsky O, Silver J, Naveh-Many T. Molecular Mechanisms of Parathyroid Disorders in Chronic Kidney Disease. Metabolites 2022; 12:metabo12020111. [PMID: 35208186 PMCID: PMC8878033 DOI: 10.3390/metabo12020111] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 01/17/2022] [Accepted: 01/20/2022] [Indexed: 01/27/2023] Open
Abstract
Secondary hyperparathyroidism (SHP) is a common complication of chronic kidney disease (CKD) that induces morbidity and mortality in patients. How CKD stimulates the parathyroid to increase parathyroid hormone (PTH) secretion, gene expression and cell proliferation remains an open question. In experimental SHP, the increased PTH gene expression is post-transcriptional and mediated by PTH mRNA–protein interactions that promote PTH mRNA stability. These interactions are orchestrated by the isomerase Pin1. Pin1 participates in conformational change-based regulation of target proteins, including mRNA-binding proteins. In SHP, Pin1 isomerase activity is decreased, and thus, the Pin1 target and PTH mRNA destabilizing protein KSRP fails to bind PTH mRNA, increasing PTH mRNA stability and levels. An additional level of post-transcriptional regulation is mediated by microRNA (miRNA). Mice with parathyroid-specific knockout of Dicer, which facilitates the final step in miRNA maturation, lack parathyroid miRNAs but have normal PTH and calcium levels. Surprisingly, these mice fail to increase serum PTH in response to hypocalcemia or uremia, indicating a role for miRNAs in parathyroid stimulation. SHP often leads to parathyroid hyperplasia. Reduced expressions of parathyroid regulating receptors, activation of transforming growth factor α-epidermal growth factor receptor, cyclooxygenase 2-prostaglandin E2 and mTOR signaling all contribute to the enhanced parathyroid cell proliferation. Inhibition of mTOR by rapamycin prevents and corrects the increased parathyroid cell proliferation of SHP. This review summarizes the current knowledge on the mechanisms that stimulate the parathyroid cell at multiple levels in SHP.
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Affiliation(s)
- Alia Hassan
- Minerva Center for Bone and Mineral Research, Nephrology Services, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel; (A.H.); (N.K.); (R.K.-L.); (J.S.)
| | - Nareman Khalaily
- Minerva Center for Bone and Mineral Research, Nephrology Services, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel; (A.H.); (N.K.); (R.K.-L.); (J.S.)
| | - Rachel Kilav-Levin
- Minerva Center for Bone and Mineral Research, Nephrology Services, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel; (A.H.); (N.K.); (R.K.-L.); (J.S.)
- Nursing, Jerusalem College of Technology, Jerusalem 91160, Israel
| | - Morris Nechama
- Pediatric Nephrology, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel; (M.N.); (O.V.)
- The Wohl Institute for Translational Medicine, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel
| | - Oded Volovelsky
- Pediatric Nephrology, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel; (M.N.); (O.V.)
- The Wohl Institute for Translational Medicine, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel
| | - Justin Silver
- Minerva Center for Bone and Mineral Research, Nephrology Services, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel; (A.H.); (N.K.); (R.K.-L.); (J.S.)
| | - Tally Naveh-Many
- Minerva Center for Bone and Mineral Research, Nephrology Services, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel; (A.H.); (N.K.); (R.K.-L.); (J.S.)
- The Wohl Institute for Translational Medicine, Hadassah—Hebrew University Medical Center, Jerusalem 91120, Israel
- Correspondence:
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129
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Miklas JW, Levy S, Hofsteen P, Mex DI, Clark E, Muster J, Robitaille AM, Sivaram G, Abell L, Goodson JM, Pranoto I, Madan A, Chin MT, Tian R, Murry CE, Moon RT, Wang Y, Ruohola-Baker H. Amino acid primed mTOR activity is essential for heart regeneration. iScience 2022; 25:103574. [PMID: 34988408 PMCID: PMC8704488 DOI: 10.1016/j.isci.2021.103574] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 06/17/2021] [Accepted: 12/03/2021] [Indexed: 01/01/2023] Open
Abstract
Heart disease is the leading cause of death with no method to repair damaged myocardium due to the limited proliferative capacity of adult cardiomyocytes. Curiously, mouse neonates and zebrafish can regenerate their hearts via cardiomyocyte de-differentiation and proliferation. However, a molecular mechanism of why these cardiomyocytes can re-enter cell cycle is poorly understood. Here, we identify a unique metabolic state that primes adult zebrafish and neonatal mouse ventricular cardiomyocytes to proliferate. Zebrafish and neonatal mouse hearts display elevated glutamine levels, predisposing them to amino-acid-driven activation of TOR, and that TOR activation is required for zebrafish cardiomyocyte regeneration in vivo. Through a multi-omics approach with cellular validation we identify metabolic and mitochondrial changes during the first week of regeneration. These data suggest that regeneration of zebrafish myocardium is driven by metabolic remodeling and reveals a unique metabolic regulator, TOR-primed state, in which zebrafish and mammalian cardiomyocytes are regeneration competent.
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Affiliation(s)
- Jason W. Miklas
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Shiri Levy
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA 98195, USA
| | - Peter Hofsteen
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Pathology, University of Washington, Seattle, WA 98109, USA
- Center for Cardiovascular Biology, University of Washington, Seattle, WA 98109, USA
| | - Diego Ic Mex
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA 98195, USA
| | - Elisa Clark
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Jeanot Muster
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- Department of Pharmacology, University of Washington, Seattle, WA 98109, USA
- Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
| | - Aaron M. Robitaille
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Pharmacology, University of Washington, Seattle, WA 98109, USA
- Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
| | - Gargi Sivaram
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA 98195, USA
| | - Lauren Abell
- Department of Pathology, University of Washington, Seattle, WA 98109, USA
- Mitochondria and Metabolism Center, University of Washington, Seattle, WA 98109, USA
- Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA 98109, USA
| | - Jamie M. Goodson
- Department of Pathology, University of Washington, Seattle, WA 98109, USA
| | - Inez Pranoto
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA 98195, USA
| | - Anup Madan
- Covance Genomics Laboratory, Redmond, WA 98052, USA
| | - Michael T. Chin
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Pathology, University of Washington, Seattle, WA 98109, USA
- Center for Cardiovascular Biology, University of Washington, Seattle, WA 98109, USA
- Department of Medicine/Cardiology, University of Washington, Seattle, WA 98109, USA
| | - Rong Tian
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA 98195, USA
- Mitochondria and Metabolism Center, University of Washington, Seattle, WA 98109, USA
- Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA 98109, USA
| | - Charles E. Murry
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- Department of Pathology, University of Washington, Seattle, WA 98109, USA
- Center for Cardiovascular Biology, University of Washington, Seattle, WA 98109, USA
- Department of Medicine/Cardiology, University of Washington, Seattle, WA 98109, USA
| | - Randall T. Moon
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Pharmacology, University of Washington, Seattle, WA 98109, USA
- Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
| | - Yuliang Wang
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Paul G. Allen School of Computer Science & Engineering, University of Washington, Seattle, WA 98195, USA
| | - Hannele Ruohola-Baker
- Institute for Stem Cell and Regenerative Medicine, University of Washington, School of Medicine, Seattle, WA 98109, USA
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- Department of Biochemistry, University of Washington, School of Medicine, Seattle, WA 98195, USA
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130
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Yang L, Zhang Z, Wang D, Jiang Y, Liu Y. Targeting mTOR Signaling in Type 2 Diabetes Mellitus and Diabetes Complications. Curr Drug Targets 2022; 23:692-710. [PMID: 35021971 DOI: 10.2174/1389450123666220111115528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 10/21/2021] [Accepted: 12/01/2021] [Indexed: 11/22/2022]
Abstract
The mechanistic target of rapamycin (mTOR) is a pivotal regulator of cell metabolism and growth. In the form of two different multi-protein complexes, mTORC1 and mTORC2, mTOR integrates cellular energy, nutrient and hormonal signals to regulate cellular metabolic homeostasis. In type 2 diabetes mellitus (T2DM) aberrant mTOR signaling underlies its pathological conditions and end-organ complications. Substantial evidence suggests that two mTOR-mediated signaling schemes, mTORC1-p70S6 kinase 1 (S6K1) and mTORC2-protein kinase B (AKT), play a critical role in insulin sensitivity and that their dysfunction contributes to development of T2DM. This review summaries our current understanding of the role of mTOR signaling in T2DM and its associated complications, as well as the potential use of mTOR inhibitors in treatment of T2DM.
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Affiliation(s)
- Lin Yang
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Zhixin Zhang
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Doudou Wang
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 102488, China
| | - Yu Jiang
- Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Ying Liu
- School of Life Sciences, Beijing University of Chinese Medicine, Beijing 102488, China
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131
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Cebey-López M, Currás-Tuala MJ, Gómez-Rial J, Rivero-Calle I, Pardo-Seco J, Mendez-Gallart R, Pischedda S, Gómez-Carballa A, Barral-Arca R, Justicia-Grande A, Viz-Lasheras S, Rodríguez-Tenreiro C, Gómez R, Salas A, Martinón-Torres F. Case Report: Everolimus reduced bone turnover markers but showed no clinical benefit in a patient with severe progressive osseous heteroplasia. Front Pediatr 2022; 10:936780. [PMID: 36483469 PMCID: PMC9723155 DOI: 10.3389/fped.2022.936780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 10/24/2022] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Progressive osseous heteroplasia (POH) is an ultrarare genetic disorder characterized by an inactivating mutation in the GNAS gene that causes heterotopic ossification. Inhibition of the mammalian target of the rapamycin (mTOR) signalling pathway has been proposed as a therapy for progressive bone fibrodysplasia and non-genetic forms of bone heteroplasia. Herein, we describe the impact of using Everolimus as a rescue therapy for an identical twin girl exhibiting an aggressive clinical phenotype of POH. METHODS Clinical evaluation of the progression of the disease during Everolimus treatment was performed periodically. Cytokine markers involved in bone metabolism and protein markers related to bone activity were analyzed to explore bone turnover activity. RESULTS The patient received Everolimus therapy for 36 weeks. During treatment, no clinical improvement of the disease was perceived. Analysis of biochemical parameters, namely, β-CTX (r 2 = -0.576, P-value = 0.016) and PNIP (r 2 = -0.598, P-value = 0.011), indicated that bone turnover activity was significantly reduced. Additionally, bone metabolism-related biomarkers showed only a significant positive correlation with PTH levels. CONCLUSIONS Everolimus treatment did not modify the clinical progression of the disease in an aggressive form of POH, although an impact on the protein markers studied was observed.
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Affiliation(s)
- M Cebey-López
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - M J Currás-Tuala
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - J Gómez-Rial
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain.,Servicio de inmunologia, Servicio de Análisis Clínicos. Hospital Clínico Universitario (SERGAS), Santiago de Compostela, Spain
| | - I Rivero-Calle
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - J Pardo-Seco
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - R Mendez-Gallart
- Pediatric Surgery, Hospital Clínico Universitario de Santiago, Santiago de Compostela, Spain
| | - S Pischedda
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - A Gómez-Carballa
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - R Barral-Arca
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - A Justicia-Grande
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - S Viz-Lasheras
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - C Rodríguez-Tenreiro
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
| | - R Gómez
- Musculoskeletal Pathology Group, Institute IDIS, Santiago University Clinical Hospital (SERGAS), Santiago de Compostela, Spain
| | - A Salas
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Unidade de Xenética, Instituto de Ciencias Forenses (INCIFOR), Facultade de Medicina, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.,GenPoB Research Group, Instituto de Investigación Sanitaria, Hospital Clínico Universitario de Santiago (SERGAS), Santiago de Compostela, Spain
| | - F Martinón-Torres
- Genetics, Vaccines, Infectious Diseases and Pediatrics Research Group (GENVIP), Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain.,Translational Pediatrics and Infectious Diseases, Department of Pediatrics, Hospital Clínico Universitario de Santiago de Compostela, Santiago de Compostela, Spain
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132
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PI3K and AKT at the Interface of Signaling and Metabolism. Curr Top Microbiol Immunol 2022; 436:311-336. [DOI: 10.1007/978-3-031-06566-8_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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133
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Effects of heroin self-administration and forced withdrawal on the expression of genes related to the mTOR network in the basolateral complex of the amygdala of male Lewis rats. Psychopharmacology (Berl) 2022; 239:2559-2571. [PMID: 35467104 PMCID: PMC9293846 DOI: 10.1007/s00213-022-06144-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 04/11/2022] [Indexed: 10/26/2022]
Abstract
RATIONALE The development of substance use disorders involves long-lasting adaptations in specific brain areas that result in an elevated risk of relapse. Some of these adaptations are regulated by the mTOR network, a signalling system that integrates extracellular and intracellular stimuli and modulates several processes related to plasticity. While the role of the mTOR network in cocaine- and alcohol-related disorders is well established, little is known about its participation in opiate use disorders. OBJECTIVES To use a heroin self-administration and a withdrawal protocol that induce incubation of heroin-seeking in male rats and study the associated effects on the expression of several genes related to the mTOR system and, in the specific case of Rictor, its respective translated protein and phosphorylation. RESULTS We found that heroin self-administration elicited an increase in the expression of the genes Igf1r, Igf2r, Akt2 and Gsk3a in the basolateral complex of the amygdala, which was not as evident at 30 days of withdrawal. We also found an increase in the expression of Rictor (a protein of the mTOR complex 2) after heroin self-administration compared to the saline group, which was occluded at the 30-day withdrawal period. The activation levels of Rictor, measured by the phosphorylation rate, were also reduced after heroin self-administration, an effect that seemed more apparent in the protracted withdrawal group. CONCLUSIONS These results suggest that heroin self-administration under extended access conditions modifies the expression profile of activators and components of the mTOR complexes and show a putative irresponsive mTOR complex 2 after withdrawal from heroin use.
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134
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Arabloei Sani M, Yaghmaei P, Hajebrahimi Z, Hayati Roodbari N. Therapeutic Effect of P-Cymene on Lipid Profile, Liver Enzyme, and Akt/Mtor Pathway in Streptozotocin-Induced Diabetes Mellitus in Wistar Rats. J Obes 2022; 2022:1015669. [PMID: 35528246 PMCID: PMC9072059 DOI: 10.1155/2022/1015669] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 09/28/2021] [Accepted: 04/12/2022] [Indexed: 11/17/2022] Open
Abstract
Diabetes is a serious public health problem in low- and middle-income countries. There is a strong link between hyperglycemia, oxidative stress, inflammation, and the development of diabetes mellitus. PI3K/Akt/mTOR is the main signaling pathway of insulin for controlling lipid and glucose metabolism. P-cymene is an aromatic monoterpene with a widespread range of therapeutic properties including antioxidant and anti-inflammatory activity. In the present study, the antidiabetic effects of p-cymene were investigated. Diabetes was induced using streptozotocin in male Wistar rats. The effects of p-cymene and metformin were studied on levels of glucose (Glu), lipid profile, liver enzymes, oxidative stress, and the expression of Akt, phospho-Akt, and mTOR (mammalian target of rapamycin) proteins, using biochemical, histological, and immunohistochemical analysis. Data have shown that p-cymene can improve serum levels of Glu, total cholesterol (TC), triglycerides (TG), high-density lipoprotein cholesterol (HDL-c), low-density lipoprotein (LDL), very-low-density lipoprotein (VLDL), alkaline phosphatase (ALP), alanine aminotransferase (ALT), aspartate aminotransferase (AST), malondialdehyde (MDA), and the expression of mTOR, Akt, and phospho-Akt protein in diabetic animals. These results suggest that p-cymene has hypoglycemia, hypolipidemia, and antioxidant properties. It can regulate Akt/mTOR pathway and reduce hepatic and pancreas injury. It can be suggested for diabetes management alone or simultaneously with metformin.
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Affiliation(s)
- Maryam Arabloei Sani
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Parichehreh Yaghmaei
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Zahra Hajebrahimi
- A & S Research Institute, Ministry of Science Research and Technology, Tehran, Iran
| | - Nasim Hayati Roodbari
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran
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135
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Aviram R, Dandavate V, Manella G, Golik M, Asher G. Ultradian rhythms of AKT phosphorylation and gene expression emerge in the absence of the circadian clock components Per1 and Per2. PLoS Biol 2021; 19:e3001492. [PMID: 34968386 PMCID: PMC8718012 DOI: 10.1371/journal.pbio.3001492] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Accepted: 11/23/2021] [Indexed: 12/26/2022] Open
Abstract
Rhythmicity of biological processes can be elicited either in response to environmental cycles or driven by endogenous oscillators. In mammals, the circadian clock drives about 24-hour rhythms of multitude metabolic and physiological processes in anticipation to environmental daily oscillations. Also at the intersection of environment and metabolism is the protein kinase—AKT. It conveys extracellular signals, primarily feeding-related signals, to regulate various key cellular functions. Previous studies in mice identified rhythmicity in AKT activation (pAKT) with elevated levels in the fed state. However, it is still unknown whether rhythmic AKT activation can be driven through intrinsic mechanisms. Here, we inspected temporal changes in pAKT levels both in cultured cells and animal models. In cultured cells, pAKT levels showed circadian oscillations similar to those observed in livers of wild-type mice under free-running conditions. Unexpectedly, in livers of Per1,2−/− but not of Bmal1−/− mice we detected ultradian (about 16 hours) oscillations of pAKT levels. Importantly, the liver transcriptome of Per1,2−/− mice also showed ultradian rhythms, corresponding to pAKT rhythmicity and consisting of AKT-related genes and regulators. Overall, our findings reveal ultradian rhythms in liver gene expression and AKT phosphorylation that emerge in the absence of environmental rhythms and Per1,2−/− genes. This study reveals ultradian (16-hour) rhythms in the activation of the protein kinase AKT in the livers of mice, accompanied by corresponding downstream changes in gene expression. Intriguingly, these oscillations emerge in the absence of rhythmic environmental cues and in mice lacking the circadian clock proteins Per1 and Per2.
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Affiliation(s)
- Rona Aviram
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Vaishnavi Dandavate
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Gal Manella
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Marina Golik
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Gad Asher
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
- * E-mail:
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136
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Huang WT, Kuo SH, Kuo YC, Lin CW. miR-155-regulated mTOR and Toll-like receptor 5 in gastric diffuse large B-cell lymphoma. Cancer Med 2021; 11:555-570. [PMID: 34913612 PMCID: PMC8817081 DOI: 10.1002/cam4.4466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/04/2021] [Accepted: 11/08/2021] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Gastric diffuse large B-cell lymphoma (DLBCL) is often associated with Helicobacter pylori (H. pylori) infection. Those in the early stage could be treated with H. pylori eradication therapy, and are classified into a sensitive group and a resistant group. METHODS Genome-wide miRNA and miRNA expression profiles were obtained from biopsy specimens of gastric DLBCL. MiRNAs and their targets as predictors of responses to H. pylori eradication therapy were identified through differential expression and pathway enrichment analysis, and further confirmed with transfection experiments in lymphoma cell lines of B-cell origin. RESULTS Genome-wide miRNA and mRNA profiles showed miR-200 was associated with the sensitive group, and that the resistant group had higher levels of miR-155 and lower levels of DEPTOR (an inhibitor of mTOR) than the sensitive group. BJAB cells transfected with miR-155 also had lower DEPTOR and higher mTOR levels. Therefore, miR-155-mediated inhibition of DEPTOR with secondary activation of mTOR was a potential marker for resistance to H. pylori eradication therapy. In contrast, pathway enrichment analysis showed that Toll-like receptor 5 (TLR5), the receptor for bacterial flagellin, was a potential marker for sensitivity to H. pylori eradication therapy. In an independent series, stronger expression of pS6K1 (a direct target of mTOR) was associated with the resistant group and morphologic evidence of active gastritis was associated with the sensitive group. CONCLUSIONS These findings showed that activation of the miR-155-DEPTOR pathway is a marker for resistance to H. pylori eradication therapy, and that histological evaluation of active gastritis might be used as a surrogate marker to predict responses to H. pylori eradication therapy in gastric DLBCL.
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Affiliation(s)
- Wei-Ting Huang
- Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan
| | - Sung-Hsin Kuo
- Department of Oncology, National Taiwan University Hospital, Taipei, Taiwan
| | - Yi-Chun Kuo
- Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chung-Wu Lin
- Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan
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137
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Dai Y, Jian C, Wang X, Dai X. Comprehensive expression profiles of mRNAs, lncRNAs and miRNAs in Kashin-Beck disease identified by RNA-sequencing. Mol Omics 2021; 18:154-166. [PMID: 34913457 DOI: 10.1039/d1mo00370d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Kashin-Beck disease (KBD) is a chronic, endemic and deforming osteochondropathy, whose basic pathological alterations include apoptosis and necrosis of chondrocytes in articular cartilage and growth plates and imbalanced extracellular matrix metabolism. Numerous studies have reported that long noncoding RNAs (lncRNAs) and microRNA (miRNAs) are aberrantly expressed in KBD. Our study was comprised of 5 KBD patients and 5 healthy individuals and we compared the expression profiles of mRNAs, lncRNAs and miRNAs through RNA-sequencing (RNA-seq). Bioinformatic analysis of GO and KEGG was employed to conduct functional annotation and pathway enriched analysis. In total, 3194 mRNAs, 4103 lncRNAs and 1550 miRNAs were detected to be differentially expressed by RNA-seq (P < 0.05; |log2FC| ≥1). The lysosome pathway, Wnt signaling pathway, TNF signaling pathway, endocytosis and mTOR signaling pathway were identified to be involved in the KBD development according to the result of the KEGG analysis. In addition, a ceRNA network based on lncRNA-miRNA-mRNA was constructed to probe the intricate regulatory mechanism and interaction between transcripts, which was visualized using the Cytoscape software. The ce-lncRNAs of four aberrantly expressed genes, FOSB, EGR3, BCAM and SOX6, were determined through the network. Among the identified DElncRNAs, we selected 8 differentially expressed lncRNAs to confirm the reliability of RNA-seq data by qRT-PCR in 11 KBD patients and 11 healthy individuals. We aimed to provide a comprehensive understanding ofmRNA, lncRNA and miRNA alterations between KBD patients and healthy individuals, and meanwhile reveal several potential causative molecular and signaling pathways involved in KBD.
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Affiliation(s)
- Yu Dai
- School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76 Yanta West Road, Xi'an, Shaanxi 710061, China
| | - Can Jian
- School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76 Yanta West Road, Xi'an, Shaanxi 710061, China
| | - Xiaofeng Wang
- School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76 Yanta West Road, Xi'an, Shaanxi 710061, China
| | - Xiaoxia Dai
- School of Public Health, Xi'an Jiaotong University Health Science Center, No. 76 Yanta West Road, Xi'an, Shaanxi 710061, China.,Key Laboratory of Trace Elements and Endemic Diseases, National Health Commission of the People's Republic of China, No. 76 Yanta West Road, Xi'an, Shaanxi 710061, China.
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138
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Tapadia M, Johnson S, Utikar R, Newsholme P, Carlessi R. Antidiabetic effects and mechanisms of action of γ-conglutin from lupin seeds. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104786] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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139
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Wang X, Zhu D, Bao W, Li M, Wang S, Shen R. Case Report: Targeted Therapy for Metastatic Solid Pseudopapillary Neoplasm of the Pancreas With CTNNB1 and PTEN Mutations. Front Oncol 2021; 11:729151. [PMID: 34733780 PMCID: PMC8558400 DOI: 10.3389/fonc.2021.729151] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 10/04/2021] [Indexed: 12/24/2022] Open
Abstract
Background Solid pseudopapillary neoplasm (SPN) of the pancreas shows an indolent clinical behavior in cases undergoing surgical resection. The efficacy of combination therapy in the metastatic extrapancreatic SPN treatment remains largely unknown and a clinical challenge. Case Presentation We report a case of a metastatic pancreatic SPN in a 45-year-old woman who presented with an aggressive peritoneal dissemination and hepatic metastases and still showed an indolent clinical course with combination therapy with repeated surgery and targeted therapy. Although the follow-up effect remains to be seen, this is the first report of practical experience of the targeted agents sunitinib and everolimus in metastatic SPN tumors based on the mutation status of PTEN (c.379G>A; p.G127R) and CTNNB1 (c.98C>G; p.S33C). To our knowledge, the PTEN variant identified in this case has not been previously reported in SPN. Conclusion Evidence on variant genetics indicates that future molecular studies may not only help to explain the mechanism of SPN occurrence and development but are also more likely to direct to future precision treatments.
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Affiliation(s)
- Xinbo Wang
- Research Institute of General Surgery, Jinling Hospital, Nanjing University Medical School, Nanjing, China
| | - Daojun Zhu
- Research Institute of General Surgery, Jinling Hospital, Nanjing University Medical School, Nanjing, China
| | - Wei Bao
- Department of Clinical Pathology, Jinling Hospital, Nanjing University Medical School, Nanjing, China
| | - Min Li
- Research Institute of General Surgery, Jinling Hospital, Nanjing University Medical School, Nanjing, China
| | - Sizhen Wang
- Research Institute of General Surgery, Jinling Hospital, Nanjing University Medical School, Nanjing, China
| | - Rongxi Shen
- Research Institute of General Surgery, Jinling Hospital, Nanjing University Medical School, Nanjing, China
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140
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Tran DT, Sundararaj K, Atkinson C, Nadig SN. T-cell Immunometabolism: Therapeutic Implications in Organ Transplantation. Transplantation 2021; 105:e191-e201. [PMID: 33795597 PMCID: PMC8464628 DOI: 10.1097/tp.0000000000003767] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Although solid-organ transplantation has evolved steadily with many breakthroughs in the past 110 y, many problems remain to be addressed, and advanced therapeutic strategies need to be considered. T-cell immunometabolism is a rapidly advancing field that has gathered much attention recently, providing ample mechanistic insight from which many novel therapeutic approaches have been developed. Applications from the field include antitumor and antimicrobial therapies, as well as for reversing graft-versus-host disease and autoimmune diseases. However, the immunometabolism of T cells remains underexplored in solid-organ transplantation. In this review, we will highlight key findings from hallmark studies centered around various metabolic modes preferred by different T-cell subtypes (categorized into naive, effector, regulatory, and memory T cells), including glycolysis, glutaminolysis, oxidative phosphorylation, fatty acid synthesis, and oxidation. This review will discuss the underlying cellular signaling components that affect these processes, including the transcription factors myelocytomatosis oncogene, hypoxia-inducible factor 1-alpha, estrogen-related receptor alpha, and sterol regulatory element-binding proteins, along with the mechanistic target of rapamycin and adenosine monophosphate-activated protein kinase signaling. We will also explore potential therapeutic strategies targeting these pathways, as applied to the potential for tolerance induction in solid-organ transplantation.
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Affiliation(s)
- Danh T. Tran
- Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, SC
- Department of Surgery, Division of Transplant Surgery, Lee Patterson Allen Transplant Immunobiology Laboratory, Medical University of South Carolina, Charleston, SC
| | - Kamala Sundararaj
- Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, SC
- Department of Surgery, Division of Transplant Surgery, Lee Patterson Allen Transplant Immunobiology Laboratory, Medical University of South Carolina, Charleston, SC
- South Carolina Investigators in Transplantation, Department of Surgery, Medical University of South Carolina, Charleston, SC
| | - Carl Atkinson
- Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, SC
- Department of Surgery, Division of Transplant Surgery, Lee Patterson Allen Transplant Immunobiology Laboratory, Medical University of South Carolina, Charleston, SC
- South Carolina Investigators in Transplantation, Department of Surgery, Medical University of South Carolina, Charleston, SC
| | - Satish N. Nadig
- Department of Microbiology & Immunology, Medical University of South Carolina, Charleston, SC
- Department of Surgery, Division of Transplant Surgery, Lee Patterson Allen Transplant Immunobiology Laboratory, Medical University of South Carolina, Charleston, SC
- South Carolina Investigators in Transplantation, Department of Surgery, Medical University of South Carolina, Charleston, SC
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Schlingmann KP, Jouret F, Shen K, Nigam A, Arjona FJ, Dafinger C, Houillier P, Jones DP, Kleinerüschkamp F, Oh J, Godefroid N, Eltan M, Güran T, Burtey S, Parotte MC, König J, Braun A, Bos C, Ibars Serra M, Rehmann H, Zwartkruis FJ, Renkema KY, Klingel K, Schulze-Bahr E, Schermer B, Bergmann C, Altmüller J, Thiele H, Beck BB, Dahan K, Sabatini D, Liebau MC, Vargas-Poussou R, Knoers NV, Konrad M, de Baaij JH. mTOR-Activating Mutations in RRAGD Are Causative for Kidney Tubulopathy and Cardiomyopathy. J Am Soc Nephrol 2021; 32:2885-2899. [PMID: 34607910 PMCID: PMC8806087 DOI: 10.1681/asn.2021030333] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 07/07/2021] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Over the last decade, advances in genetic techniques have resulted in the identification of rare hereditary disorders of renal magnesium and salt handling. Nevertheless, approximately 20% of all patients with tubulopathy lack a genetic diagnosis. METHODS We performed whole-exome and -genome sequencing of a patient cohort with a novel, inherited, salt-losing tubulopathy; hypomagnesemia; and dilated cardiomyopathy. We also conducted subsequent in vitro functional analyses of identified variants of RRAGD, a gene that encodes a small Rag guanosine triphosphatase (GTPase). RESULTS In eight children from unrelated families with a tubulopathy characterized by hypomagnesemia, hypokalemia, salt wasting, and nephrocalcinosis, we identified heterozygous missense variants in RRAGD that mostly occurred de novo. Six of these patients also had dilated cardiomyopathy and three underwent heart transplantation. We identified a heterozygous variant in RRAGD that segregated with the phenotype in eight members of a large family with similar kidney manifestations. The GTPase RagD, encoded by RRAGD, plays a role in mediating amino acid signaling to the mechanistic target of rapamycin complex 1 (mTORC1). RagD expression along the mammalian nephron included the thick ascending limb and the distal convoluted tubule. The identified RRAGD variants were shown to induce a constitutive activation of mTOR signaling in vitro. CONCLUSIONS Our findings establish a novel disease, which we call autosomal dominant kidney hypomagnesemia (ADKH-RRAGD), that combines an electrolyte-losing tubulopathy and dilated cardiomyopathy. The condition is caused by variants in the RRAGD gene, which encodes Rag GTPase D; these variants lead to an activation of mTOR signaling, suggesting a critical role of Rag GTPase D for renal electrolyte handling and cardiac function.
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Affiliation(s)
- Karl P. Schlingmann
- Department of General Pediatrics, University Children’s Hospital, Münster, Germany
| | - François Jouret
- Division of Nephrology, Department of Internal Medicine, University of Liège Hospital, Liège, Belgium,Interdisciplinary Group of Applied Genoproteomics, Cardiovascular Sciences, University of Liège, Liège, Belgium
| | - Kuang Shen
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts,Department of Biology, Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts,Koch Institute for Integrative Cancer Research, Cambridge, Massachusetts,Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, Massachusetts,Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts
| | - Anukrati Nigam
- Department of Genetics, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Francisco J. Arjona
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Claudia Dafinger
- Department of Pediatrics and Center for Molecular Medicine Cologne, Faculty of Medicine, University of Cologne and University Hospital Cologne, Cologne, Germany,Department II of Internal Medicine and Center for Molecular Medicine Cologne, Faculty of Medicine, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Pascal Houillier
- Cordeliers Research Center, Centre National de la Recherche Scientifique (CNRS), ERL8228, Institut National de la Santé et de la Recherche Médicale (INSERM), Sorbonne University, University of Paris, Paris, France,Department of Physiology, Assistance Publique-Hôpitaux de Paris (AP-HP), European Hospital Georges Pompidou, Paris, France,Reference Center for Hereditary Renal Diseases in Children and Adults (MARHEA), Paris, France
| | - Deborah P. Jones
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Felix Kleinerüschkamp
- Department of Pediatric Cardiology, University Children’s Hospital, Münster, Germany
| | - Jun Oh
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Nathalie Godefroid
- Division of Pediatric Nephrology, Saint-Luc University Clinics, Catholic University of Louvain, Brussels, Belgium
| | - Mehmet Eltan
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Marmara University, Istanbul, Turkey
| | - Tülay Güran
- Department of Pediatric Endocrinology and Diabetes, School of Medicine, Marmara University, Istanbul, Turkey
| | - Stéphane Burtey
- Center for Nephrology and Renal Transplantation, Assistance Publique-Hôpitaux de Marseille, Aix-Marseille University, Marseille, France
| | - Marie-Christine Parotte
- Division of Nephrology-Dialysis, Department of Internal Medicine, CHR Verviers East Belgium, Verviers, Belgium
| | - Jens König
- Department of General Pediatrics, University Children’s Hospital, Münster, Germany
| | - Alina Braun
- Department of Pediatrics and Center for Molecular Medicine Cologne, Faculty of Medicine, University of Cologne and University Hospital Cologne, Cologne, Germany,Department II of Internal Medicine and Center for Molecular Medicine Cologne, Faculty of Medicine, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Caro Bos
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Maria Ibars Serra
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Holger Rehmann
- Department of Molecular Cancer Research, Center for Molecular Medicine, Oncode Institute, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Fried J.T. Zwartkruis
- Department of Molecular Cancer Research, Center for Molecular Medicine, Oncode Institute, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Kirsten Y. Renkema
- Department of Genetics, Center for Molecular Medicine, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Karin Klingel
- Cardiopathology, Institute for Pathology and Neuropathology, University Hospital Tübingen, Tübingen, Germany
| | - Eric Schulze-Bahr
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany
| | - Bernhard Schermer
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, Faculty of Medicine, University of Cologne and University Hospital Cologne, Cologne, Germany,CECAD, Faculty of Medicine, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Carsten Bergmann
- Limbach Genetics, Medizinische Genetik Mainz, Mainz, Germany,Division of Nephrology, Department of Medicine, University Hospital Freiburg, Breisgau, Germany
| | - Janine Altmüller
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Holger Thiele
- Cologne Center for Genomics, University of Cologne, Cologne, Germany
| | - Bodo B. Beck
- Institute of Human Genetics, University Hospital Cologne and University of Cologne, Faculty of Medicine, Cologne, Germany,Center for Molecular Medicine Cologne, University of Cologne, Faculty of Medicine, University Hospital Cologne, Cologne, Germany,Center for Rare Diseases, Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Karin Dahan
- Center of Human Genetics, Gosselies, Belgium,Division of Nephrology, Saint-Luc University Clinics, Catholic University of Louvain, Brussels, Belgium
| | - David Sabatini
- Whitehead Institute for Biomedical Research, Cambridge, Massachusetts,Department of Biology, Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, Massachusetts,Koch Institute for Integrative Cancer Research, Cambridge, Massachusetts,Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Max C. Liebau
- Department of Pediatrics and Center for Molecular Medicine Cologne, Faculty of Medicine, University of Cologne and University Hospital Cologne, Cologne, Germany,Department II of Internal Medicine and Center for Molecular Medicine Cologne, Faculty of Medicine, University of Cologne and University Hospital Cologne, Cologne, Germany,Center for Rare Diseases, Medical Faculty, University of Cologne and University Hospital Cologne, Cologne, Germany
| | - Rosa Vargas-Poussou
- Department of Genetics, AP-HP, European Hospital Georges Pompidou, Paris, France
| | - Nine V.A.M. Knoers
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Martin Konrad
- Department of General Pediatrics, University Children’s Hospital, Münster, Germany
| | - Jeroen H.F. de Baaij
- Department of Physiology, Radboud Institute for Molecular Life Sciences, Radboud University Medical Center, Nijmegen, The Netherlands
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142
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Catar RA, Wischnewski O, Chen L, Heidecke H, Rutz C, Schülein R, Dragun D, Philippe A, Kusch A. Non-HLA antibodies targeting angiotensin II type 1 receptors and endothelin-1 type A receptors impair endothelial repair via a β2-arrestin link to the mTOR pathway. Kidney Int 2021; 101:498-509. [PMID: 34757123 DOI: 10.1016/j.kint.2021.09.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/02/2021] [Accepted: 09/10/2021] [Indexed: 01/03/2023]
Abstract
Functional non-HLA antibodies (antibodies to non-human leukocyte antigens) targeting the G protein-coupled receptors angiotensin II type 1 receptor (AT1R) and endothelin-1 type A receptor (ETAR) are implicated in the pathogenesis of transplant vasculopathy. While ERK signaling (a regulator of cell growth) may represent a general cellular response to agonist stimulation, the molecular link between receptor stimulation and development of vascular obliteration has not been fully established. Here we hypothesize involvement of the versatile adaptor proteins, β-arrestins, and the major regulator of cell growth, PI3K/mTOR signaling, in impaired endothelial repair. To test this, human microvascular endothelial cells were treated with AT1R/ETAR antibodies isolated from patients with kidney transplant vasculopathy. These antibodies activated both mTOR complexes via AT1R and ETAR in a PI3K-dependent and ERK-independent manner. The mTOR inhibitor, rapamycin, completely abolished activation of mTORC1 and mTORC2 after long-term treatment with receptor antibodies. Imaging studies revealed that β2- but not β1-arrestin was recruited to ETAR in response to ET1 and patient antibodies but not with antibodies isolated from healthy individuals. Silencing of β2-arrestin by siRNA transfection significantly reduced ERK1/2 and mTORC2 activation. Non-HLA antibodies impaired endothelial repair by AT1R- and ETAR-induced mTORC2 signaling. Thus, we provide evidence that functional AT1R/ETAR antibodies induce ERK1/2 and mTOR signaling involving β2-arrestin in human microvascular endothelium. Hence, our data may provide a translational rational for mTOR inhibitors in combination with receptor blockers in patients with non-HLA receptor recognizing antibodies.
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Affiliation(s)
- Rusan Ali Catar
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Medizinische Klinik m. S. Nephrologie und internistische Intensivmedizin, Berlin, Germany; Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center for Cardiovascular Research, Charitéplatz 1, Berlin, Germany.
| | - Oskar Wischnewski
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Medizinische Klinik m. S. Nephrologie und internistische Intensivmedizin, Berlin, Germany
| | - Lei Chen
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Medizinische Klinik m. S. Nephrologie und internistische Intensivmedizin, Berlin, Germany; Department of Nephrology, The Fifth Affiliated Hospital of Sun Yat-Sen University, Zhuhai City, Guandong Province, People's Republic of China
| | | | - Claudia Rutz
- Leibniz Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V., Berlin, Germany
| | - Ralf Schülein
- Leibniz Forschungsinstitut für Molekulare Pharmakologie im Forschungsverbund Berlin e.V., Berlin, Germany
| | - Duska Dragun
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Medizinische Klinik m. S. Nephrologie und internistische Intensivmedizin, Berlin, Germany; Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center for Cardiovascular Research, Charitéplatz 1, Berlin, Germany; Berlin Institute of Health at Charité-Universitätsmedizin Berlin, BIH Biomedical Innovation Academy, Charitéplatz 1, Berlin, Germany
| | - Aurélie Philippe
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Medizinische Klinik m. S. Nephrologie und internistische Intensivmedizin, Berlin, Germany; Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center for Cardiovascular Research, Charitéplatz 1, Berlin, Germany; Berlin Institute of Health at Charité-Universitätsmedizin Berlin, BIH Biomedical Innovation Academy, Charitéplatz 1, Berlin, Germany
| | - Angelika Kusch
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Medizinische Klinik m. S. Nephrologie und internistische Intensivmedizin, Berlin, Germany; Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Center for Cardiovascular Research, Charitéplatz 1, Berlin, Germany; Berlin Institute of Health at Charité-Universitätsmedizin Berlin, BIH Biomedical Innovation Academy, Charitéplatz 1, Berlin, Germany; DZHK (German Centre for Cardiovascular Research), partner site Berlin, Germany.
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143
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Li Y, Fu C, Liu L, Liu Y, Li F. mTOR and ERK1/2 signaling participate in the process of acetate regulating lipid metabolism and HSL expression. Anim Biosci 2021; 35:1444-1453. [PMID: 34727637 PMCID: PMC9449403 DOI: 10.5713/ab.21.0341] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Accepted: 10/01/2021] [Indexed: 11/27/2022] Open
Abstract
Objective Acetate plays an important role in host lipid metabolism. However, the network of acetate-regulated lipid metabolism remains unclear. Previous studies show that mitogen-activated protein kinases (MAPKs) and mechanistic target of rapamycin (mTOR) play a crucial role in lipid metabolism. We hypothesize that acetate could affect MAPKs and/or mTOR signaling and then regulate lipid metabolism. The present study investigated whether any cross talk occurs among MAPKs, mTOR and acetate in regulating lipid metabolism. Methods The ceramide C6 (an extracellular signaling-regulated kinases 1 and 2 [ERK1/2] activator) and MHY1485 (a mTOR activator) were used to treat rabbit adipose-derived stem cells (ADSCs) with or without acetate, respectively. Results It indicated that acetate (9 mM) treatment for 48 h decreased the lipid deposition in rabbit ADSCs. Acetate treatment decreased significantly phosphorylated protein levels of ERK1/2 and mTOR but significantly increased mRNA level of hormone-sensitive lipase (HSL). Acetate treatment did not significantly alter the phosphorylated protein level of p38 MAPK and c-Jun aminoterminal kinase (JNK). Activation of ERK1/2 and mTOR by respective addition in media with ceramide C6 and MHY1485 significantly attenuated decreased lipid deposition and increased HSL expression caused by acetate. Conclusion Our results suggest that ERK1/2 and mTOR signaling pathways are associated with acetate regulated HSL gene expression and lipid deposition.
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Affiliation(s)
- Yujuan Li
- Department of Animal Science, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Chunyan Fu
- Department of Animal Science, Shandong Agricultural University, Taian, Shandong 271018, China.,Poultry Institute, Shandong Academy of Agricultural Science, Jinan, Shandong 250023, China
| | - Lei Liu
- Department of Animal Science, Shandong Agricultural University, Taian, Shandong 271018, China
| | - Yongxu Liu
- Qingdao Kangda Food Co., LTD., Qingdao, Shandong 266555, China
| | - Fuchang Li
- Department of Animal Science, Shandong Agricultural University, Taian, Shandong 271018, China
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144
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Kim HK, Park Y, Shin M, Kim JM, Go GW. Betulinic Acid Suppresses de novo Lipogenesis by Inhibiting Insulin and IGF1 Signaling as Upstream Effectors of the Nutrient-Sensing mTOR Pathway. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:12465-12473. [PMID: 34645271 DOI: 10.1021/acs.jafc.1c04797] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Despite its beneficial properties, effects of betulinic acid on the nutrient-sensing mTOR pathway via insulin or IGF1 signaling remain unclear. Here, we investigated whether betulinic acid reduces intracellular lipid accumulation via the nutrient-sensing pathway in HepG2 cells. Results showed that betulinic acid reduced intracellular lipid accumulation in a dose-dependent manner and inhibited the expression of de novo lipogenesis-related genes and proteins. RNA sequencing analysis revealed the transcriptional modulation of plasma membrane proteins by betulinic acid, and an in silico binding assay indicated an interaction between betulinic acid and IR or IGF1R. Furthermore, betulinic acid downregulated the post-translational modification of the canonical IRS1/PI3K/AKT-pT308 and IGF1/mTORC2/AKT-pS473 pathways, thereby reducing the activity of the mTOR/S6K/S6 pathway. These findings imply that betulinic acid suppresses hepatic lipid synthesis by inhibiting insulin and IGF1 signaling as upstream effectors of the nutrient-sensing mTOR pathway and could be a potent nutraceutical agent for the treatment of metabolic syndromes.
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Affiliation(s)
- Hyun Kyung Kim
- Department of Food and Nutrition, Hanyang University, Seoul 04763, Republic of Korea
| | - Yejee Park
- Department of Animal Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Minhye Shin
- Department of Microbiology, College of Medicine, Inha University, Incheon 22212, Republic of Korea
| | - Jun-Mo Kim
- Department of Animal Science and Technology, Chung-Ang University, Anseong, Gyeonggi-do 17546, Republic of Korea
| | - Gwang-Woong Go
- Department of Food and Nutrition, Hanyang University, Seoul 04763, Republic of Korea
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145
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Abstract
Immunosuppression is complex, fraught with on-target and off-target adverse effects, and hard to get right but is the key to successful allotransplantation. Herein, we review the key immunosuppressive agent classes used for kidney transplant, highlighting mechanisms of action and typical clinical use.
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Affiliation(s)
- Jeanne Kamal
- Division of Nephrology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Alden Doyle
- Division of Nephrology, University of Virginia School of Medicine, Charlottesville, VA, USA.
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146
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Hatakeyama R. Pib2 as an Emerging Master Regulator of Yeast TORC1. Biomolecules 2021; 11:biom11101489. [PMID: 34680122 PMCID: PMC8533233 DOI: 10.3390/biom11101489] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/05/2021] [Accepted: 10/07/2021] [Indexed: 12/18/2022] Open
Abstract
Cell growth is dynamically regulated in response to external cues such as nutrient availability, growth factor signals, and stresses. Central to this adaptation process is the Target of Rapamycin Complex 1 (TORC1), an evolutionarily conserved kinase complex that fine-tunes an enormous number of cellular events. How upstream signals are sensed and transmitted to TORC1 has been intensively studied in major model organisms including the budding yeast Saccharomyces cerevisiae. This field recently saw a breakthrough: the identification of yeast phosphatidylInositol(3)-phosphate binding protein 2 (Pib2) protein as a critical regulator of TORC1. Although the study of Pib2 is still in its early days, multiple groups have provided important mechanistic insights on how Pib2 relays nutrient signals to TORC1. There remain, on the other hand, significant gaps in our knowledge and mysteries that warrant further investigations. This is the first dedicated review on Pib2 that summarizes major findings and outstanding questions around this emerging key player in cell growth regulation.
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Affiliation(s)
- Riko Hatakeyama
- Institute of Medical Sciences, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK
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147
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Fu Y, Wei Y, Zhou Y, Wu H, Hong Y, Long C, Wang J, Wu Y, Wu S, Shen L, Wei G. Wnt5a Regulates Junctional Function of Sertoli cells Through PCP-mediated Effects on mTORC1 and mTORC2. Endocrinology 2021; 162:6334711. [PMID: 34338758 DOI: 10.1210/endocr/bqab149] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Indexed: 12/14/2022]
Abstract
The blood-testis barrier (BTB) and apical ectoplasmic specialization (ES), which are synchronized through the crosstalk of Sertoli cells and Sertoli germ cells, are required for spermatogenesis and sperm release. Here, we show that Wnt5a, a noncanonical Wnt signaling pathway ligand, is predominately expressed in both the BTB and apical ES and has a specific expression pattern during the seminiferous epithelium cycle. We employed siRNA to knockdown Wnt5a expression in testis and Sertoli cells, and then identified elongated spermatids that lost their polarity and were embedded in the seminiferous epithelium. Moreover, phagosomes were found near the tubule lumen. These defects were due to BTB and apical ES disruption. We also verified that the expression level and/or location of BTB-associated proteins, actin binding proteins (ABPs), and F-actin was changed after Wnt5a knockdown in vivo and in vitro. Additionally, we demonstrated that Wnt5a regulated actin dynamics through Ror2-mediated mTORC1 and mTORC2. This study clarified the molecular mechanism of Wnt5a in Sertoli cell junctions through the planar cell polarity (PCP) signaling pathway. Our findings could provide an experimental basis for the clinical diagnosis and treatment of male infertility caused by Sertoli cell junction impairment.
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Affiliation(s)
- Yan Fu
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Yuexin Wei
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Yu Zhou
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Huan Wu
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Yifan Hong
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Chunlan Long
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Junke Wang
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Yuhao Wu
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Shengde Wu
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Lianju Shen
- Pediatric Research Institute, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
| | - Guanghui Wei
- Department of Urology, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
- Chongqing Key Laboratory of Children Urogenital Development and Tissue Engineering; Chongqing Key Laboratory of Pediatrics; Ministry of Education Key Laboratory of Child Development and Disorders; National Clinical Research Center for Child Health and Disorders; China International Science and Technology Cooperation base of Child development and Critical Disorders, Children's Hospital of Chongqing Medical University, Chongqing, 400014, PR China
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148
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Sanjeev RK, Nuggehalli Srinivas P, Krishnan B, Basappa YC, Dinesh AS, Ulahannan SK. Eco-geographic patterns of child malnutrition in India and its association with cereal cultivation: An analysis using demographic health survey and agriculture datasets. Wellcome Open Res 2021; 5:118. [PMID: 35720193 PMCID: PMC9194519 DOI: 10.12688/wellcomeopenres.15934.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/22/2021] [Indexed: 08/30/2024] Open
Abstract
Background: High prevalence of maternal malnutrition, low birth-weight and child malnutrition in India contribute substantially to the global malnutrition burden. Rural India has disproportionately higher levels of child malnutrition. Stunting and wasting are the primary determinants of child malnutrition and their district-level distribution shows clustering in different geographies and regions. Cereals, particularly millets, constitute the bulk of protein intake among the poor, especially in rural areas in India where high prevalence of wasting persists. Methods: The last round of National Family Health Survey (NFHS4) has disaggregated data by district, enabling a more fine-scale characterisation of the prevalence of markers of malnutrition. We used data from NFHS4 and agricultural statistics datasets to analyse relationship of prevalence of malnutrition at the district level and area under cereal cultivation. We analysed malnutrition through data on under-5 stunting and wasting by district. Results: Stunting and wasting patterns across districts show a distinct geographical and age distribution; districts with higher wasting showed relatively higher prevalence before six months of age. Wasting prevalence at district level was associated with higher cultivation of millets, with a stronger association seen for jowar and other millets (Kodo millet, little millet, proso millet, barnyard millet and foxtail millet). District level stunting was associated with higher district level cultivation of all crops (except other millets). The analysis was limited by lack of fine-scale data on prevalence of low birth-weight and type of cereal consumed. Conclusions: Better cereal cultivation and consumption data will be needed to confirm causal pathways contributing to potential ecogeographic patterns. The cultivation of other millets has a strong association with prevalence of wasting. State-of-the-art studies that improve our understanding of bio-availability of amino acids and other nutrients from the prevalent dietary matrices of rural poor communities will be needed to confirm causal pathways contributing to potential eco-geographic patterns.
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Affiliation(s)
- Rama Krishna Sanjeev
- Pediatrics, Rural Medical College, Pravara Institute of Medical Sciences, Loni (BK), Ahmednagar district, Maharashtra, 413736, India
| | | | - Bindu Krishnan
- Physiology, Rural Medical College, Pravara Institute of Medical Sciences, Loni (BK), Ahmednagar district, Maharashtra, 413736, India
| | - Yogish Channa Basappa
- Health equity cluster, Institute of Public Health Bengaluru, Bengaluru, Karnataka, 560070, India
| | | | - Sabu K. Ulahannan
- Health equity cluster, Institute of Public Health Bengaluru, Bengaluru, Karnataka, 560070, India
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149
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Wang X, Wei Z, Jiang Y, Meng Z, Lu M. mTOR Signaling: The Interface Linking Cellular Metabolism and Hepatitis B Virus Replication. Virol Sin 2021; 36:1303-1314. [PMID: 34580816 PMCID: PMC8692646 DOI: 10.1007/s12250-021-00450-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Accepted: 08/24/2021] [Indexed: 01/05/2023] Open
Abstract
Mammalian target of rapamycin (mTOR) is a conserved Ser/Thr kinase that includes mTOR complex (mTORC) 1 and mTORC2. The mTOR pathway is activated in viral hepatitis, including hepatitis B virus (HBV) infection-induced hepatitis. Currently, chronic HBV infection remains one of the most serious public health issues worldwide. The unavailability of effective therapeutic strategies for HBV suggests that clarification of the pathogenesis of HBV infection is urgently required. Increasing evidence has shown that HBV infection can activate the mTOR pathway, indicating that HBV utilizes or hijacks the mTOR pathway to benefit its own replication. Therefore, the mTOR signaling pathway might be a crucial target for controlling HBV infection. Here, we summarize and discuss the latest findings from model biology research regarding the interaction between the mTOR signaling pathway and HBV replication.
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Affiliation(s)
- Xueyu Wang
- Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, 410011, China.,Institute of Virology, University Hospital Essen, University of Duisburg-Essen, 45122, Essen, Germany
| | - Zhiqiang Wei
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China
| | - Yongfang Jiang
- Department of Infectious Diseases, The Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Zhongji Meng
- Institute of Biomedical Research, Hubei Clinical Research Center for Precise Diagnosis and Treatment of Liver Cancer, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China. .,Department of Infectious Diseases, Taihe Hospital, Hubei University of Medicine, Shiyan, 442000, China.
| | - Mengji Lu
- Institute of Virology, University Hospital Essen, University of Duisburg-Essen, 45122, Essen, Germany.
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150
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Keane L, Antignano I, Riechers SP, Zollinger R, Dumas AA, Offermann N, Bernis ME, Russ J, Graelmann F, McCormick PN, Esser J, Tejera D, Nagano A, Wang J, Chelala C, Biederbick Y, Halle A, Salomoni P, Heneka MT, Capasso M. mTOR-dependent translation amplifies microglia priming in aging mice. J Clin Invest 2021; 131:132727. [PMID: 33108356 DOI: 10.1172/jci132727] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 10/14/2020] [Indexed: 12/20/2022] Open
Abstract
Microglia maintain homeostasis in the brain. However, with age, they become primed and respond more strongly to inflammatory stimuli. We show here that microglia from aged mice had upregulated mTOR complex 1 signaling controlling translation, as well as protein levels of inflammatory mediators. Genetic ablation of mTOR signaling showed a dual yet contrasting effect on microglia priming: it caused an NF-κB-dependent upregulation of priming genes at the mRNA level; however, mice displayed reduced cytokine protein levels, diminished microglia activation, and milder sickness behavior. The effect on translation was dependent on reduced phosphorylation of 4EBP1, resulting in decreased binding of eIF4E to eIF4G. Similar changes were present in aged human microglia and in damage-associated microglia, indicating that upregulation of mTOR-dependent translation is an essential aspect of microglia priming in aging and neurodegeneration.
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Affiliation(s)
- Lily Keane
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.,Centre for Tumour Microenvironment and
| | | | | | | | | | - Nina Offermann
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Maria E Bernis
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Jenny Russ
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | | | | | - Julia Esser
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Dario Tejera
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Ai Nagano
- Centre for Cancer Genomics and Computational Biology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Jun Wang
- Centre for Cancer Genomics and Computational Biology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Claude Chelala
- Centre for Cancer Genomics and Computational Biology, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | | | - Annett Halle
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Paolo Salomoni
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Michael T Heneka
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Melania Capasso
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany.,Centre for Tumour Microenvironment and
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