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González-Pereira P, Trinh R, Vasuthasawat A, Bartsch-Jiménez A, Nuñez-Soto C, Altamirano C. Enhancing Antibody-Specific Productivity: Unraveling the Impact of XBP1s Overexpression and Glutamine Availability in SP2/0 Cells. Bioengineering (Basel) 2024; 11:201. [PMID: 38534475 DOI: 10.3390/bioengineering11030201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 02/10/2024] [Accepted: 02/17/2024] [Indexed: 03/28/2024] Open
Abstract
Augmentation of glycoprotein synthesis requirements induces endoplasmic reticulum (ER) stress, activating the unfolded protein response (UPR) and triggering unconventional XBP1 splicing. As a result, XBP1s orchestrates the expression of essential genes to reduce stress and restore homeostasis. When this mechanism fails, chronic stress may lead to apoptosis, which is thought to be associated with exceeding a threshold in XBP1s levels. Glycoprotein assembly is also affected by glutamine (Gln) availability, limiting nucleotide sugars (NS), and preventing compliance with the increased demands. In contrast, increased Gln intake synthesizes ammonia as a by-product, potentially reaching toxic levels. IgA2m(1)-producer mouse myeloma cells (SP2/0) were used as the cellular mammalian model. We explored how IgA2m(1)-specific productivity (qIgA2m(1)) is affected by (i) overexpression of human XBP1s (h-XBP1s) levels and (ii) Gln availability, evaluating the kinetic behavior in batch cultures. The study revealed a two and a five-fold increase in qIgA2m(1) when lower and higher levels of XBP1s were expressed, respectively. High h-XBP1s overexpression mitigated not only ammonia but also lactate accumulation. Moreover, XBP1s overexpressor showed resilience to hydrodynamic stress in serum-free environments. These findings suggest a potential application of h-XBP1s overexpression as a feasible and cost-effective strategy for bioprocess scalability.
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Affiliation(s)
- Priscilla González-Pereira
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso 2340000, Chile
| | - Ryan Trinh
- Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Alex Vasuthasawat
- Department of Microbiology, Immunology, and Molecular Genetics, University of California Los Angeles, Los Angeles, CA 90095, USA
| | - Angelo Bartsch-Jiménez
- Escuela Kinesiología, Facultad de Medicina, Universidad de Valparaíso, Valparaíso 2362735, Chile
| | - Constanza Nuñez-Soto
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso 2340000, Chile
| | - Claudia Altamirano
- Escuela de Ingeniería Bioquímica, Pontificia Universidad Católica de Valparaíso, Avenida Brasil 2085, Valparaíso 2340000, Chile
- IMPACT, Center of Interventional Medicine for Precision and Advanced Cellular Therapy, Av. Monseñor Álvaro del Portillo 12455, Las Condes, Santiago 7550000, Chile
- Centro Regional de Estudios en Alimentos Saludables, Av. Universidad 330, Curauma-Placilla, Valparaíso 2340000, Chile
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Feng N, Ye Y, Pan Y, Kuang B, Du Y, Geng N, Chen C, Liu K, Liang L, Xian M, Yang Y, Li X, Deng L, Zhang F, Kuang L, Fan M, Xie Y, Guo F. The circUbqln1, regulated by XBP1s, interplays with 14-3-3ζ to inhibit collagen synthesis and promote osteoarthritis by controlling PRODH activity and proline metabolism. J Adv Res 2024:S2090-1232(24)00007-9. [PMID: 38219870 DOI: 10.1016/j.jare.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 11/28/2023] [Accepted: 01/06/2024] [Indexed: 01/16/2024] Open
Abstract
INTRODUCTION Osteoarthritis (OA) is a degenerative bone disease associated with ageing, characterized by joint pain, stiffness, swelling and deformation. Currently, pharmaceutical options for the clinical treatment of OA are very limited. Circular RNAs(cirRNAs) have garnered significant attention in OA and related drug development due to their unique RNA sequence characteristics.Therefore,exploring the role of cirRNAs in the occurrence and development of OA is of paramount importance for the development of effective medications for OA. OBJECTIVES To identify a novel circRNA, circUbqln1, for treating osteoarthritis and elucidate its pathophysiological role and mechanisms in the treatment of OA. METHODS The circUbqln1 expression and distribution were determined by qRT-PCR and FISH. XBP1 gene knockout(XBP1 cKO) spontaneous OA and DMM model and WT mouse CIOA model were used to explore the role of XBP1 and circUbqln1 in OA.Overexpression or knockdown of circUbqln1 lentivirus was used to observe the impacts of circUbqln1 on primary chondrocytes,C28/I2 and mice in vitro and in vivo.Chromatin immunoprecipitation,luciferase reporter assay,RNA pulldown,mass spectrometry,RNA immunoprecipitation,fluorescence in situ hybridization,and flow cytometry to explore the molecular mechanisms of circUbqln1. RESULTS It was found that cartilage-specific XBP1 cKO mice exhibited a faster OA progression compared to normal's.Importantly,transcript factor XBP1s has the capacity to impede the biogenesis of circUbqln1,derived from Ubqln1. The circUbqln1 promotes cartilage catabolism and inhibits anabolism, therefore accelerates the occurrence of OA.Mechanismly,circUbqln1 can translocate to the chondrocyte nucleus with the assistance of phosphorylated 14-3-3ζ, upregulate the transcriptional activity of the proline dehydrogenase(Prodh) promoter and PRODH enzyme activity. Consequently, this leads to the promotion of proline degradation and the inhibition of collagen synthesis,ultimately culminating in the impairment of cartilage and its structural integrity. CONCLUSION CircUbqln1 plays a crucial role in the occurrence and development of OA, indicating that the inhibition of circUbqln1 holds promise as a significant approach for treating OA in the future.
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Affiliation(s)
- Naibo Feng
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Yuanlan Ye
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Yiming Pan
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Biao Kuang
- Department of Orthopedics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Yu Du
- Department of Orthopedics, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Nana Geng
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Cheng Chen
- Department of Orthopedics, The First Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Kaiwen Liu
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Li Liang
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Menglin Xian
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Yuyou Yang
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Xingyue Li
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Lin Deng
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Fengmei Zhang
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Liang Kuang
- Department of Wound Repair and Rehabilitation Medicine, Center of Bone Metabolism and Repair (CBMR), State Key Laboratory of Trauma and Chemical Poisoning, Daping Hospital, Army Medical University, Chongqing, China
| | - Mengtian Fan
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Yangli Xie
- Department of Wound Repair and Rehabilitation Medicine, Center of Bone Metabolism and Repair (CBMR), State Key Laboratory of Trauma and Chemical Poisoning, Daping Hospital, Army Medical University, Chongqing, China
| | - Fengjin Guo
- State Key Laboratory of Ultrasound in Medicine and Engineering, School of Basic Medical Sciences, The Second Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China.
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Huang PY, Shih IA, Liao YC, You HL, Lee MJ. FT895 Impairs Mitochondrial Function in Malignant Peripheral Nerve Sheath Tumor Cells. Int J Mol Sci 2023; 25:277. [PMID: 38203448 PMCID: PMC10779378 DOI: 10.3390/ijms25010277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/19/2023] [Accepted: 12/21/2023] [Indexed: 01/12/2024] Open
Abstract
Neurofibromatosis type 1 (NF1) stands as a prevalent neurocutaneous disorder. Approximately a quarter of NF1 patients experience the development of plexiform neurofibromas, potentially progressing into malignant peripheral nerve sheath tumors (MPNST). FT895, an HDAC11 inhibitor, exhibits potent anti-tumor effects on MPNST cells and enhances the cytotoxicity of cordycepin against MPNST. The study aims to investigate the molecular mechanism underlying FT895's efficacy against MPNST cells. Initially, our study unveiled that FT895 disrupts mitochondrial biogenesis and function. Post-FT895 treatment, reactive oxygen species (ROS) in MPNST notably increased, while mitochondrial DNA copy numbers decreased significantly. Seahorse analysis indicated a considerable decrease in basal, maximal, and ATP-production-coupled respiration following FT895 treatment. Immunostaining highlighted FT895's role in promoting mitochondrial aggregation without triggering mitophagy, possibly due to reduced levels of XBP1, Parkin, and PINK1 proteins. Moreover, the study using CHIP-qPCR analysis revealed a significant reduction in the copy numbers of promoters of the MPV17L2, POLG, TFAM, PINK1, and Parkin genes. The RNA-seq analysis underscored the prominent role of the HIF-1α signaling pathway post-FT895 treatment, aligning with the observed impairment in mitochondrial respiration. In summary, the study pioneers the revelation that FT895 induces mitochondrial respiratory damage in MPNST cells.
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Affiliation(s)
- Po-Yuan Huang
- Department of Neurology, National Taiwan University Hospital, No. 7, Chung-Shan South Road, Taipei 10012, Taiwan; (P.-Y.H.); (I.-A.S.); (Y.-C.L.); (H.-L.Y.)
| | - I-An Shih
- Department of Neurology, National Taiwan University Hospital, No. 7, Chung-Shan South Road, Taipei 10012, Taiwan; (P.-Y.H.); (I.-A.S.); (Y.-C.L.); (H.-L.Y.)
| | - Ying-Chih Liao
- Department of Neurology, National Taiwan University Hospital, No. 7, Chung-Shan South Road, Taipei 10012, Taiwan; (P.-Y.H.); (I.-A.S.); (Y.-C.L.); (H.-L.Y.)
| | - Huey-Ling You
- Department of Neurology, National Taiwan University Hospital, No. 7, Chung-Shan South Road, Taipei 10012, Taiwan; (P.-Y.H.); (I.-A.S.); (Y.-C.L.); (H.-L.Y.)
| | - Ming-Jen Lee
- Department of Neurology, National Taiwan University Hospital, No. 7, Chung-Shan South Road, Taipei 10012, Taiwan; (P.-Y.H.); (I.-A.S.); (Y.-C.L.); (H.-L.Y.)
- Department of Medical Genetics, National Taiwan University Hospital, Taipei 10012, Taiwan
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Gao K, Yi Y, Xue Z, Wang Z, Huang S, Zhang B, Lin P, Wang A, Chen H, Jin Y. Downregulation of XBP1s aggravates lipopolysaccharide-induced inflammation by promoting NF-κB and NLRP3 pathways' activation in goat endometrial epithelial cells. Theriogenology 2023; 210:119-132. [PMID: 37494784 DOI: 10.1016/j.theriogenology.2023.07.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 12/16/2022] [Accepted: 07/13/2023] [Indexed: 07/28/2023]
Abstract
After delivery, bacterial contamination and uterine tissue degeneration in animals can lead to the development of uterine diseases, such as endometritis, accompanied by endoplasmic reticulum stress (ERS). Increasing evidence suggests that spliced X-box binding protein 1 (XBP1s), a critical component of ERS, is involved in several pathological processes in various organisms. However, the specific molecular mechanisms by which XBP1s mediates the inflammatory response in goat endometrial epithelial cells (gEECs) remain largely unknown. In the present study, XBP1s protein was induced into the nucleus in the lipopolysaccharide (LPS, 5 μg/mL)-induced inflammatory response of gEECs. Lipopolysaccharide-induced expression and nucleation of XBP1s were reduced by the inhibition of Toll-like receptor 4 (TLR4) using TAK-242 (1 μM; a TLR4 inhibitor). Expression and nucleation of XBP1s were similarly reduced when the activity of inositol-requiring enzyme 1α (IRE1α) was inhibited using 4μ8C (10 μM; an IRE1α inhibitor). In addition, inhibition of IRE1a increased IL-1β, TNF-α, and IL-8 levels and secretion of IL-6 induced by LPS. Notably, phosphorylation of nuclear factor kappa-B (NF-κB) P65 protein and expression of NOD-like receptor thermal protein domain associated protein 3 (NLRP3) were similarly increased. Furthermore, knockdown of XBP1s in gEECs consistently promoted NF-κB P65 protein phosphorylation, NLRP3 protein expression, and inflammatory cytokine secretion. In summary, the current results suggest that in the LPS-induced inflammatory response in gEECs, LPS generates intracellular signaling cascades in gEECs via TLR4, which may promote XBP1s protein expression and nucleation by activating IRE1a. However, downregulation of XBP1s expression exacerbates inflammation by promoting activation of the NF-κB and NLRP3 inflammatory vesicle pathways. These results will potentially contribute to the treatment and prevention of endometritis in ruminants.
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Affiliation(s)
- Kangkang Gao
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Yanyan Yi
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Zhongqiang Xue
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Zongjie Wang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Shan Huang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Beibei Zhang
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Pengfei Lin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Aihua Wang
- Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Huatao Chen
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China.
| | - Yaping Jin
- Department of Clinical Veterinary Medicine, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China; Key Laboratory of Animal Biotechnology of the Ministry of Agriculture and Rural Affairs, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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Abbasi S, Rivand H, Eshaghi F, Moosavi MA, Amanpour S, McDermott MF, Rahmati M. Inhibition of IRE1 RNase activity modulates tumor cell progression and enhances the response to chemotherapy in colorectal cancer. Med Oncol 2023; 40:247. [PMID: 37480455 DOI: 10.1007/s12032-023-02105-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 06/23/2023] [Indexed: 07/24/2023]
Abstract
Drug resistance is one of the clinical challenges that limits the effectiveness of chemotherapy. Recent reports suggest that the unfolded protein response (UPR) and endoplasmic reticulum stress-adaptation signalling pathway, along with increased activation of its inositol-requiring enzyme 1α (IRE1α) arm, may be contributors to the pathogenesis of colorectal cancer (CRC). Here, we aimed to target the IRE1α/XBP1 pathway in order to sensitise CRC cells to the effects of chemotherapy. The CT26 colorectal cell line was treated with tunicamycin, and then was exposed to different concentrations of 5-fluorouracil (5-FU), either alone and/or in combination with the IRE1α inhibitor, 4µ8C. An MTT assay, flow cytometry and RT-PCR were performed to determine cell growth, apoptosis and IRE1α activity, respectively. In vivo BALB/c syngeneic colorectal mice received chemotherapeutic drugs. Treatment responses, tumour sizes and cytotoxicity were assessed via a range of pathological tests. 4µ8C was found to inhibit the growth of CRC, at a concentration of 10 µg/ml, without detectable cytotoxic effects and also significantly enhanced the cytotoxic potential of 5-FU, in CRC cells. In vivo experiments revealed that 4µ8C, at a concentration of 50 µM/kg prevented tumour growth without any cytotoxic or metastatic effects. Interestingly, the combination of 4µ8C with 5-FU remarkably enhanced drug responses, up to 40-60% and also lead to significantly greater inhibition of tumour growth, in comparison to monotherapy, in CRC mice. Targeting the IRE1α/XBP1 axis of the UPR could enhance the effectiveness of chemotherapy in both in vitro and in vivo models of CRC.
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Affiliation(s)
- Sana Abbasi
- Cancer Biology Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Helia Rivand
- Cancer Biology Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Biochemistry, Faculty of Biological Science, Tarbiat Modares University, Tehran, Iran
| | - Fatemeh Eshaghi
- Cancer Biology Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Amin Moosavi
- Department of Molecular Medicine, Institute of Medical Biotechnology (IMB), National Institute of Genetic Engineering and Biotechnology (NIGEB), P.O Box 14965/161, Tehran, Iran
| | - Saeid Amanpour
- Cancer Biology Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Michael F McDermott
- Leeds Institute of Rheumatic and Musculoskeletal Medicine (LIRMM), University of Leeds, Leeds, UK.
| | - Marveh Rahmati
- Cancer Biology Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran.
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Guo M, Zhuang H, Su Y, Meng Q, Liu W, Liu N, Wei M, Dai SM, Deng H. SIRT3 alleviates imiquimod-induced psoriatic dermatitis through deacetylation of XBP1s and modulation of TLR7/8 inducing IL-23 production in macrophages. Front Immunol 2023; 14:1128543. [PMID: 37275851 PMCID: PMC10235469 DOI: 10.3389/fimmu.2023.1128543] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 05/09/2023] [Indexed: 06/07/2023] Open
Abstract
Current evidence suggests that IL-23, IL-6, and TNF-α play pivotal roles in the pathogenesis of psoriasis. Although it has been established that Sirtuin 3 (SIRT3) mediates the inflammatory process, the underlying mechanisms remain largely unclear. Herein, we substantiated that the inhibition or deletion of SIRT3 increased the acetylation level of spliced form of X-box binding protein 1 (XPB1s), enhancing its transcriptional activity and IL-23a production. Pharmacologically inhibition of XBP1s with MKC8866 downregulated the expression of inflammatory cytokines in SIRT3-inhibited or Sirt3-KO BMDMs stimulated by IMQ. Inhibition or knockdown of SIRT3 could exacerbate psoriasis-like skin inflammation in an imiquimod-induced psoriasis-like mouse model. Besides, a decrease in SIRT3 expression was observed in the macrophages of psoriasis patients, which increased the expression and acetylation level of XBP1s. Overall, we provide compelling evidence of the crucial role of SIRT3 in the IL-23 axis in psoriatic inflammation and novel molecular insights into the anti-inflammatory effects of SIRT3.
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Affiliation(s)
- Meiliang Guo
- Department of Dermatology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Haojun Zhuang
- Department of Dermatology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yimin Su
- Department of Dermatology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Qinqin Meng
- Department of Dermatology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wanwen Liu
- Department of Dermatology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Na Liu
- Department of Dermatology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Min Wei
- Department of Dermatology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Sheng-Ming Dai
- Department of Rheumatology & Immunology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hui Deng
- Department of Dermatology, Shanghai Sixth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Liu S, Gao Q, Li Y, Lun J, Yu M, Zhang H, Fang J. XBP1s acts as a transcription factor of IRE1α and promotes proliferation of colon cancer cells. Arch Biochem Biophys 2023; 737:109552. [PMID: 36828260 DOI: 10.1016/j.abb.2023.109552] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 02/14/2023] [Accepted: 02/21/2023] [Indexed: 02/24/2023]
Abstract
Upon ER stress, IRE1α is activated to splice XBP1 mRNA to generate XBP1s, a transcription factor that induces the expression of genes to cope with the stress. Expression of IRE1α is elevated in cancers and the IRE1α-XBP1s axis plays an important role in proliferation of cancer cells. However, the underlying mechanism is not well known. We found that ER stressors induced the expression of IRE1α, which was inhibited by depletion of XBP1s. XBP1s bound IRE1α promoter and initiated the transcription of IRE1α. These data indicate that XBP1s acts as a transcription factor of IRE1α. Overexpression of XBP1s increased the phosphorylation of JNK, a substrate of IRE1α kinase, which was inhibited by IRE1α kinase inhibitor Kira8. Overexpression of XBP1s also activated the regulated IRE1-dependent decay of mRNAs, which was suppressed by IRE1α RNase inhibitor STF083010. Moreover, we found that expression of XBP1s promoted proliferation of colon cancer cells, which was abrogated by Kira8 and STF083010. The results suggest that XBP1s functions to induce IRE1α expression and promote cancer cell proliferation. Our findings reveal a previously unknown mechanism of IRE1α expression by XBP1s and highlight the role of this regulation in proliferation of colon cancer cells, suggesting that IRE1α-targeting is a potential therapeutic strategy for colon cancer.
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Affiliation(s)
- Shuting Liu
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, School of Basic Medicine, Qingdao University, Qingdao 266061, China
| | - Qiang Gao
- Shanghai Institute of Nutrition and Health, CAS, Shanghai, 200031, China
| | - Yuyao Li
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, School of Basic Medicine, Qingdao University, Qingdao 266061, China
| | - Jie Lun
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, School of Basic Medicine, Qingdao University, Qingdao 266061, China
| | - Mengchao Yu
- Department of Gastroenterology, Qingdao Municipal Hospital, Qingdao, 266071, China
| | - Hongwei Zhang
- Shandong Provincial Maternal and Child Health Care Hospital Affiliated to Qingdao University, Jinan, 250014, China.
| | - Jing Fang
- Department of Oncology, The Affiliated Hospital of Qingdao University, Qingdao Cancer Institute, School of Basic Medicine, Qingdao University, Qingdao 266061, China.
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Minchenko DO, Khita OO, Viletska YM, Sliusar MY, Rudnytska OV, Kozynkevych HE, Bezrodnyi BH, Khikhlo YP, Minchenko OH. Cortisol controls endoplasmic reticulum stress and hypoxia dependent regulation of insulin receptor and related genes expression in HEK293 cells. Endocr Regul 2023; 58:1-10. [PMID: 38345493 DOI: 10.2478/enr-2024-0001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/15/2024] Open
Abstract
Objective. Glucocorticoids are important stress-responsive regulators of insulin-dependent metabolic processes realized through specific changes in genome function. The aim of this study was to investigate the impact of cortisol on insulin receptor and related genes expression in HEK293 cells upon induction the endoplasmic reticulum (ER) stress by tunicamycin and hypoxia. Methods. The human embryonic kidney cell line HEK293 was used. Cells were exposed to cortisol (10 µM) as well as inducers of hypoxia (dimethyloxalylglycine, DMOG; 0.5 mM) and ER stress (tunicamycin; 0.2 µg/ml) for 4 h. The RNA from these cells was extracted and reverse transcribed. The expression level of INSR, IRS2, and INSIG2 and some ER stress responsive genes encoding XBP1n, non-spliced variant, XBP1s, alternatively spliced variant of XBP1, and DNAJB9 proteins, was measured by quantitative polymerase chain reaction and normalized to ACTB. Results. We showed that exposure of HEK293 cells to cortisol elicited up-regulation in the expression of INSR and DNAJB9 genes and down-regulation of XBP1s, XBP1n, IRS2, and INSIG2 mRNA levels. At the same time, induction of hypoxia by DMOG led to an up-regulation of the expression level of most studied mRNAs: XBP1s and XBP1n, IRS2 and INSIG2, but did not change significantly INSR and DNAJB9 gene expression. We also showed that combined impact of cortisol and hypoxia introduced the up-regulation of INSR and suppressed XBP1n mRNA expression levels. Furthermore, the exposure of HEK293 cells to tunicamycin affected the expression of IRS2 gene and increased the level of XBP1n mRNA. At the same time, the combined treatment of these cells with cortisol and inductor of ER stress had much stronger impact on the expression of all the tested genes: strongly increased the mRNA level of ER stress dependent factors XBP1s and DNAJB9 as well as INSR and INSIG2, but down-regulated IRS2 and XBP1n. Conclusion. Taken together, the present study indicates that cortisol may interact with ER stress and hypoxia in the regulation of ER stress dependent XBP1 and DNAJB9 mRNA expression as well as INSR and its signaling and that this corticosteroid hormone modified the impact of hypoxia and especially tunicamycin on the expression of most studied genes in HEK293 cells. These data demonstrate molecular mechanisms of glucocorticoids interaction with ER stress and insulin signaling at the cellular level.
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Affiliation(s)
- Dmytro O Minchenko
- 1Department of Molecular Biology, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kiev 01030, Ukraine
- 2Departments of Pediatrics No.1 and Surgery, National Bohomolets Medical University, Kyiv, Ukraine
| | - Olena O Khita
- 1Department of Molecular Biology, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kiev 01030, Ukraine
| | - Yuliia M Viletska
- 1Department of Molecular Biology, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kiev 01030, Ukraine
| | - Myroslava Y Sliusar
- 1Department of Molecular Biology, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kiev 01030, Ukraine
| | - Olha V Rudnytska
- 1Department of Molecular Biology, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kiev 01030, Ukraine
| | - Halyna E Kozynkevych
- 2Departments of Pediatrics No.1 and Surgery, National Bohomolets Medical University, Kyiv, Ukraine
| | - Borys H Bezrodnyi
- 2Departments of Pediatrics No.1 and Surgery, National Bohomolets Medical University, Kyiv, Ukraine
| | - Yevgen P Khikhlo
- 1Department of Molecular Biology, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kiev 01030, Ukraine
| | - Oleksandr H Minchenko
- 1Department of Molecular Biology, Palladin Institute of Biochemistry, National Academy of Sciences of Ukraine, Kiev 01030, Ukraine
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9
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Cabral‐Miranda F, Tamburini G, Martinez G, Ardiles AO, Medinas DB, Gerakis Y, Hung MD, Vidal R, Fuentealba M, Miedema T, Duran‐Aniotz C, Diaz J, Ibaceta‐Gonzalez C, Sabusap CM, Bermedo‐Garcia F, Mujica P, Adamson S, Vitangcol K, Huerta H, Zhang X, Nakamura T, Sardi SP, Lipton SA, Kennedy BK, Henriquez JP, Cárdenas JC, Plate L, Palacios AG, Hetz C. Unfolded protein response IRE1/XBP1 signaling is required for healthy mammalian brain aging. EMBO J 2022; 41:e111952. [PMID: 36314651 PMCID: PMC9670206 DOI: 10.15252/embj.2022111952] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 09/09/2022] [Accepted: 09/16/2022] [Indexed: 11/18/2022] Open
Abstract
Aging is a major risk factor to develop neurodegenerative diseases and is associated with decreased buffering capacity of the proteostasis network. We investigated the significance of the unfolded protein response (UPR), a major signaling pathway activated to cope with endoplasmic reticulum (ER) stress, in the functional deterioration of the mammalian brain during aging. We report that genetic disruption of the ER stress sensor IRE1 accelerated age-related cognitive decline. In mouse models, overexpressing an active form of the UPR transcription factor XBP1 restored synaptic and cognitive function, in addition to reducing cell senescence. Proteomic profiling of hippocampal tissue showed that XBP1 expression significantly restore changes associated with aging, including factors involved in synaptic function and pathways linked to neurodegenerative diseases. The genes modified by XBP1 in the aged hippocampus where also altered. Collectively, our results demonstrate that strategies to manipulate the UPR in mammals may help sustain healthy brain aging.
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Affiliation(s)
- Felipe Cabral‐Miranda
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
- Instituto de Ciências BiomédicasUniversidade Federal do Rio de JaneiroRio de JaneiroBrazil
| | - Giovanni Tamburini
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | - Gabriela Martinez
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | - Alvaro O Ardiles
- Centro Interdisciplinario de Neurociencia de ValparaísoUniversidad de ValparaisoValparaisoChile
- Centro de Neurología Traslacional, Escuela de MedicinaUniversidad de ValparaísoValparaisoChile
| | - Danilo B Medinas
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | - Yannis Gerakis
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | - Mei‐Li Diaz Hung
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | - René Vidal
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Center for Integrative BiologyUniversidad MayorSantiagoChile
| | - Matias Fuentealba
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | - Tim Miedema
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | - Claudia Duran‐Aniotz
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | - Javier Diaz
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
| | | | - Carleen M Sabusap
- Departments of Chemistry and Biological SciencesVanderbilt UniversityNashvilleTNUSA
| | - Francisca Bermedo‐Garcia
- Department of Cell Biology, Center for Advanced Microscopy (CMA BioBio)Universidad de ConcepciónConcepciónChile
| | - Paula Mujica
- Centro de Neurología Traslacional, Escuela de MedicinaUniversidad de ValparaísoValparaisoChile
| | | | | | - Hernan Huerta
- Center for Integrative BiologyUniversidad MayorSantiagoChile
| | - Xu Zhang
- Department of Molecular Medicine and Neurodegeneration New Medicines CenterThe Scripps Research InstituteLa JollaCAUSA
| | - Tomohiro Nakamura
- Department of Molecular Medicine and Neurodegeneration New Medicines CenterThe Scripps Research InstituteLa JollaCAUSA
| | | | - Stuart A Lipton
- Department of Molecular Medicine and Neurodegeneration New Medicines CenterThe Scripps Research InstituteLa JollaCAUSA
- Department of Neurosciences, School of MedicineUniversity of California, San DiegoLa JollaCAUSA
| | - Brian K Kennedy
- Buck Institute for Research on AgingNovatoCAUSA
- Healthy Longevity Translational Research Programme, Yong Loo Lin School of Medicine, National University of Singapore; Centre for Healthy Longevity, National University Health System; Departments of Biochemistry and Physiology, Yong Loo Lin School of Medicine, National University of SingaporeSingaporeSingapore
| | - Juan Pablo Henriquez
- Department of Cell Biology, Center for Advanced Microscopy (CMA BioBio)Universidad de ConcepciónConcepciónChile
| | - J Cesar Cárdenas
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Center for Integrative BiologyUniversidad MayorSantiagoChile
- Buck Institute for Research on AgingNovatoCAUSA
| | - Lars Plate
- Departments of Chemistry and Biological SciencesVanderbilt UniversityNashvilleTNUSA
| | - Adrian G Palacios
- Centro Interdisciplinario de Neurociencia de ValparaísoUniversidad de ValparaisoValparaisoChile
| | - Claudio Hetz
- Center for GeroscienceBrain Health and MetabolismSantiagoChile
- Biomedical Neuroscience Institute, Faculty of MedicineUniversity of ChileSantiagoChile
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, Faculty of MedicineUniversity of ChileSantiagoChile
- Buck Institute for Research on AgingNovatoCAUSA
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10
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Wiseman RL, Mesgarzadeh JS, Hendershot LM. Reshaping endoplasmic reticulum quality control through the unfolded protein response. Mol Cell 2022; 82:1477-1491. [PMID: 35452616 PMCID: PMC9038009 DOI: 10.1016/j.molcel.2022.03.025] [Citation(s) in RCA: 93] [Impact Index Per Article: 46.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/28/2022] [Accepted: 03/18/2022] [Indexed: 01/09/2023]
Abstract
Endoplasmic reticulum quality control (ERQC) pathways comprising chaperones, folding enzymes, and degradation factors ensure the fidelity of ER protein folding and trafficking to downstream secretory environments. However, multiple factors, including tissue-specific secretory proteomes, environmental and genetic insults, and organismal aging, challenge ERQC. Thus, a key question is: how do cells adapt ERQC to match the diverse, ever-changing demands encountered during normal physiology and in disease? The answer lies in the unfolded protein response (UPR), a signaling mechanism activated by ER stress. In mammals, the UPR comprises three signaling pathways regulated downstream of the ER membrane proteins IRE1, ATF6, and PERK. Upon activation, these UPR pathways remodel ERQC to alleviate cellular stress and restore ER function. Here, we describe how UPR signaling pathways adapt ERQC, highlighting their importance for maintaining ER function across tissues and the potential for targeting the UPR to mitigate pathologies associated with protein misfolding diseases.
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Affiliation(s)
- R. Luke Wiseman
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037,To whom correspondences should be addressed: Linda Hendershot, ; R. Luke Wiseman,
| | - Jaleh S. Mesgarzadeh
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037
| | - Linda M. Hendershot
- Department of Tumor Biology, St Jude Children’s Research Hospital, Memphis, TN 38105,To whom correspondences should be addressed: Linda Hendershot, ; R. Luke Wiseman,
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11
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García-González P, Fernández D, Gutiérrez D, Parra-Cordero M, Osorio F. Human cDC1 display constitutive activation of the UPR Sensor IRE1. Eur J Immunol 2022; 52:1069-1076. [PMID: 35419836 PMCID: PMC9541385 DOI: 10.1002/eji.202149774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 04/08/2022] [Accepted: 04/08/2022] [Indexed: 12/04/2022]
Abstract
The intracellular mechanisms safeguarding DC function are of biomedical interest in several immune‐related diseases. Type 1 conventional DCs (cDC1s) are prominent targets of immunotherapy typified by constitutive activation of the unfolded protein response (UPR) sensor IRE1. Through its RNase domain, IRE1 regulates key processes in cDC1s including survival, ER architecture and function. However, most evidence linking IRE1 RNase with cDC1 biology emerges from mouse studies and it is currently unknown whether human cDC1s also activate the enzyme to preserve cellular homeostasis. In this work, we report that human cDC1s constitutively activate IRE1 RNase in steady state, which is evidenced by marked expression of IRE1, XBP1s, and target genes, and low levels of mRNA substrates of the IRE1 RNase domain. On a functional level, pharmacological inhibition of the IRE1 RNase domain curtailed IL‐12 and TNF production by cDC1s upon stimulation with TLR agonists. Altogether, this work demonstrates that activation of the IRE1/XBP1s axis is a conserved feature of cDC1s across species and suggests that the UPR sensor may also play a relevant role in the biology of the human lineage.
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Affiliation(s)
- Paulina García-González
- Laboratory of Immunology and Cellular Stress, Immunology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Dominique Fernández
- Laboratory of Immunology and Cellular Stress, Immunology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Diane Gutiérrez
- Fetal Medicine Unit, Clinical Hospital of University of Chile, Santiago, Chile
| | - Mauro Parra-Cordero
- Fetal Medicine Unit, Clinical Hospital of University of Chile, Santiago, Chile
| | - Fabiola Osorio
- Laboratory of Immunology and Cellular Stress, Immunology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
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12
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Meng H, Gonzales NM, Jung SY, Lu Y, Putluri N, Zhu B, Dacso CC, Lonard DM, O'Malley BW. Defining the mammalian coactivation of hepatic 12-h clock and lipid metabolism. Cell Rep 2022; 38:110491. [PMID: 35263593 PMCID: PMC8958721 DOI: 10.1016/j.celrep.2022.110491] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 11/05/2021] [Accepted: 02/14/2022] [Indexed: 12/18/2022] Open
Abstract
The 12-h clock coordinates lipid homeostasis, energy metabolism, and stress rhythms via the transcriptional regulator XBP1. However, the biochemical and physiological bases for integrated control of the 12-h clock and diverse metabolic pathways remain unclear. Here, we show that steroid receptor coactivator SRC-3 coactivates XBP1 transcription and regulates hepatic 12-h cistrome and gene rhythmicity. Mice lacking SRC-3 show abnormal 12-h rhythms in hepatic transcription, metabolic functions, systemic energetics, and rate-limiting lipid metabolic processes, including triglyceride, phospholipid, and cardiolipin pathways. Notably, 12-h clock coactivation is not only preserved, with its cistromic activation priming ahead of the zeitgeber cue of light, but concomitant with rhythmic remodeling in the absence of food. These findings reveal that SRC-3 integrates the mammalian 12-h clock, energy metabolism, and membrane and lipid homeostasis and demonstrates a role for the 12-h clock machinery as an active transcriptional mechanism in anticipating physiological and metabolic energy needs and stresses.
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Affiliation(s)
- Huan Meng
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA.
| | - Naomi M Gonzales
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Sung Yun Jung
- Department of Biochemistry, Baylor College of Medicine, Houston, TX 77030, USA
| | - Yue Lu
- Department of Epigenetics and Molecular Carcinogenesis, The University of Texas MD Anderson Cancer Center, Science Park, Smithville, TX 78957, USA
| | - Nagireddy Putluri
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Bokai Zhu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Clifford C Dacso
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - David M Lonard
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Bert W O'Malley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA.
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13
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Jiang H, Jiang Q, He Y, Li X, Xu Y, Liu X. XBP1s promotes the development of lung adenocarcinoma via the p‑JNK MAPK pathway. Int J Mol Med 2022; 49:34. [PMID: 35059734 PMCID: PMC8815418 DOI: 10.3892/ijmm.2022.5089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 12/16/2021] [Indexed: 11/12/2022] Open
Abstract
Spliced X-box binding protein 1 (XBP1s) has been reported to participate in the pathogenesis of numerous types of cancer; however, whether XBP1s plays a role in lung cancer remains to be elucidated. In the present study, bioinformatics analysis was performed to determine the mRNA expression level of XBP1 in lung cancer and adjacent normal tissues. Gene Ontology terms, pathway enrichment and Pearson's correlation analysis were performed to investigate the possible mechanism involved. Western blot and reverse transcription-quantitative PCR were performed to quantify the protein and mRNA expression level of target proteins, respectively. Small interfering RNA or overexpression plasmid were used to knockdown or overexpress the expression level of XBP1s. EdU staining, colony formation, Cell Counting Kit-8, Transwell and wound healing assays, and flow cytometry were performed to detect the proliferation, colony forming ability, cell viability, migration and invasion ability, and the apoptosis rate. The results showed that the mRNA and protein expression level of XBP1 was higher in tumor tissues compared with that in adjacent normal tissues using data from the TIMER2.0, ONCOMINE and UALCAN online databases. In addition, the mRNA expression level of XBP1 was also associated with clinical features, including age, smoking habit, individual cancer stage and nodal metastasis status. In the in vitro experiments, the mRNA and protein expression level of XBP1s was increased in the A549 cell line compared with that in the human bronchial epithelial (HBE), H1299, PC9 and H460 cell lines. Hypoxia further increased the protein expression level of XBP1s in the A549 cell line. Knockdown of XBP1s expression in the A549 cell line resulted in decreased proliferation, colony formation, cell viability, migration and invasion, and increased apoptosis. By contrast, overexpressing XBP1s in the HBE cell line led to the opposite results. To investigate the mechanism involved, proteins associated with XBP1 were analyzed using the LinkedOmics database. Pathway enrichment revealed the MAPK pathway to be the possible XBP1 downstream target. Furthermore, Pearson's correlation and western blot analyses verified that phosphorylated (p)-JNK rather than p-ERK or p-p38 was the downstream effector of XBP1s. Phosphorylation of JNK was decreased when XBP1s expression was knocked down in the A549 cell line under normoxic and hypoxic conditions. Inhibiting p-JNK with SP600125 reversed the increased prosurvival effects caused by XBP1s overexpression. The results from the present study suggest that XBP1s/p-JNK function as a prosurvival factors in the A549 cell line and could be a potential target for the treatment of lung adenocarcinoma.
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Affiliation(s)
- Hongxia Jiang
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Qianqian Jiang
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Yuanzhou He
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Xiaochen Li
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Yongjian Xu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
| | - Xiansheng Liu
- Department of Pulmonary and Critical Care Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, P.R. China
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14
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Torres M, Dickson AJ. Reprogramming of Chinese hamster ovary cells towards enhanced protein secretion. Metab Eng 2021; 69:249-261. [PMID: 34929420 DOI: 10.1016/j.ymben.2021.12.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/25/2021] [Accepted: 12/14/2021] [Indexed: 12/20/2022]
Abstract
The deficient secretory phenotype of Chinese hamster ovary (CHO) cells is a major limitation for high-level production of biopharmaceuticals, particularly for those with complex molecular architectures and post-translational modifications. To improve CHO cell secretory capacity, we recently engineered CHO cell hosts to overexpress BLIMP1 (CHOB), in a cell engineering strategy that transformed the cellular machinery and led to significantly higher product yields and cell-specific productivities for different rproteins. Here, as a follow-up to our previous study, we developed new CHO cell hosts that co-overexpress BLIMP1 and XBP1s ( CHOBX ), two transcription factors that together drive the professional secretory function of antibody-producing plasma cells. We found that the CHOBX cells presented an improved performance over that of CHOB cells, with better product yields and cell-specific productivities for a recombinant IgG1 and a 'difficult-to-express' EPO-Fc fusion protein. These improvements in the CHOBX-derived cell lines resulted from a series of physiological and metabolic changes due to the synergetic co-expression of BLIMP1 and XBP1s. Firstly, cells presented an inhibited cell growth and arrested cell cycle in G1/G0 phase, features that were directly linked to BLIMP1 expression levels. Secondly, cells increased protein translation (both overall and recombinant protein), expanded the endoplasmic reticulum and improved their capacity to secrete protein more effectively. Lastly, cells showed a metabolic profile favouring energy production, with a pronounced lactate switch and increased consumption of amino acids. This study highlights the value of transcription factors for reprogramming CHO cells towards a desired phenotype, offering the potential to engineer cells with new functionalities for enhanced manufacturing of recombinant therapeutic proteins.
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Affiliation(s)
- Mauro Torres
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, Manchester, UK; Department of Chemical Engineering and Analytical Science, Biochemical and Bioprocess Engineering Group, University of Manchester, Manchester, UK
| | - Alan J Dickson
- Manchester Institute of Biotechnology, Faculty of Science and Engineering, University of Manchester, Manchester, UK; Department of Chemical Engineering and Analytical Science, Biochemical and Bioprocess Engineering Group, University of Manchester, Manchester, UK.
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15
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Zhang X, Huo Z, Luan H, Huang Y, Shen Y, Sheng L, Liang J, Wu F. Scutellarin ameliorates hepatic lipid accumulation by enhancing autophagy and suppressing IRE1α/XBP1 pathway. Phytother Res 2021; 36:433-447. [PMID: 34859513 DOI: 10.1002/ptr.7344] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 09/29/2021] [Accepted: 11/01/2021] [Indexed: 12/29/2022]
Abstract
Nonalcoholic fatty liver disease is the most prevalent liver disease characterized by excessive lipid accumulation in hepatocytes. Endoplasmic reticulum (ER) stress and autophagy play an important role in lipid accumulation. In this study, scutellarin (Scu) was examined in palmitic acid-treated HepG2 cells and C57/BL6 mice fed a high-fat diet (HFD). Scu reduced intracellular lipid content and inhibited sterol regulatory element binding protein-1c (SREBP-1c)-mediated lipid synthesis and fatty acid translocase-mediated lipid uptake in HepG2 cells. Additionally, Scu restored impaired autophagy and inhibited excessive activation of ER stress in vivo and in vitro. Moreover, Scu upregulated forkhead box O transcription factor 1-mediated autophagy by inhibiting inositol-requiring enzyme 1α (IRE1α)/X-box-binding protein 1 (XBP1) branch activation, while XBP1s overexpression exacerbated the lipid accumulation and impaired autophagy in HepG2 cells and also weakened the positive effects of Scu. Furthermore, Scu attenuated ER stress by activating autophagy, ultimately downregulating SREBP-1c-mediated lipid synthesis, and autophagy inhibitors offset these beneficial effects. Scu inhibited the crosstalk between autophagy and ER stress and downregulated saturated fatty acid-induced lipid accumulation in hepatocytes. These findings demonstrate that Scu ameliorates hepatic lipid accumulation by enhancing autophagy and suppressing ER stress via the IRE1α/XBP1 pathway.
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Affiliation(s)
- Xueying Zhang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Zhaojiong Huo
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Huiling Luan
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yihai Huang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yanhui Shen
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Liang Sheng
- School of Basic Medical Science, Nanjing Medical University, Nanjing, China
| | - Jiangyu Liang
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Feihua Wu
- School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
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16
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Gebert M, Sobolewska A, Bartoszewska S, Cabaj A, Crossman DK, Króliczewski J, Madanecki P, Dąbrowski M, Collawn JF, Bartoszewski R. Genome-wide mRNA profiling identifies X-box-binding protein 1 (XBP1) as an IRE1 and PUMA repressor. Cell Mol Life Sci 2021; 78:7061-7080. [PMID: 34636989 PMCID: PMC8558229 DOI: 10.1007/s00018-021-03952-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 09/17/2021] [Accepted: 09/28/2021] [Indexed: 02/06/2023]
Abstract
Accumulation of misfolded proteins in ER activates the unfolded protein response (UPR), a multifunctional signaling pathway that is important for cell survival. The UPR is regulated by three ER transmembrane sensors, one of which is inositol-requiring protein 1 (IRE1). IRE1 activates a transcription factor, X-box-binding protein 1 (XBP1), by removing a 26-base intron from XBP1 mRNA that generates spliced XBP1 mRNA (XBP1s). To search for XBP1 transcriptional targets, we utilized an XBP1s-inducible human cell line to limit XBP1 expression in a controlled manner. We also verified the identified XBP1-dependent genes with specific silencing of this transcription factor during pharmacological ER stress induction with both an N-linked glycosylation inhibitor (tunicamycin) and a non-competitive inhibitor of the sarco/endoplasmic reticulum Ca2+ ATPase (SERCA) (thapsigargin). We then compared those results to the XBP1s-induced cell line without pharmacological ER stress induction. Using next‐generation sequencing followed by bioinformatic analysis of XBP1-binding motifs, we defined an XBP1 regulatory network and identified XBP1 as a repressor of PUMA (a proapoptotic gene) and IRE1 mRNA expression during the UPR. Our results indicate impairing IRE1 activity during ER stress conditions accelerates cell death in ER-stressed cells, whereas elevating XBP1 expression during ER stress using an inducible cell line correlated with a clear prosurvival effect and reduced PUMA protein expression. Although further studies will be required to test the underlying molecular mechanisms involved in the relationship between these genes with XBP1, these studies identify a novel repressive role of XBP1 during the UPR.
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Affiliation(s)
- Magdalena Gebert
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdansk, Poland
| | - Aleksandra Sobolewska
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdansk, Poland
| | - Sylwia Bartoszewska
- Department of Inorganic Chemistry, Medical University of Gdansk, Gdansk, Poland
| | - Aleksandra Cabaj
- Laboratory of Bioinformatics, Nencki Institute of Experimental Biology of the Polish Academy of Sciences, Warsaw, Poland
| | - David K Crossman
- Department of Genetics, Heflin Center for Genomic Science, University of Alabama at Birmingham, Birmingham, AL, 35233, USA
| | - Jarosław Króliczewski
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdansk, Poland
| | - Piotr Madanecki
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdansk, Poland
| | - Michał Dąbrowski
- Laboratory of Bioinformatics, Nencki Institute of Experimental Biology of the Polish Academy of Sciences, Warsaw, Poland
| | - James F Collawn
- Department of Cell, Developmental and Integrative Biology, University of Alabama at Birmingham, Birmingham, AL, 35233, USA
| | - Rafal Bartoszewski
- Department of Biology and Pharmaceutical Botany, Medical University of Gdansk, Hallera 107, 80-416, Gdansk, Poland.
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Wang T, Wu J, Dong W, Wang M, Zhong X, Zhang W, Dai L, Xie Y, Liu Y, He X, Liu W, Madhusudhan T, Zeng H, Wang H. The MEK inhibitor U0126 ameliorates diabetic cardiomyopathy by restricting XBP1's phosphorylation dependent SUMOylation. Int J Biol Sci 2021; 17:2984-2999. [PMID: 34421344 PMCID: PMC8375222 DOI: 10.7150/ijbs.60459] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 06/19/2021] [Indexed: 12/14/2022] Open
Abstract
Background: Chronic diabetes accelerates vascular dysfunction often resulting in cardiomyopathy but underlying mechanisms remain unclear. Recent studies have shown that the deregulated unfolded protein response (UPR) dependent on highly conserved IRE1α-spliced X-box- binding protein (XBP1s) and the resulting endoplasmic reticulum stress (ER-Stress) plays a crucial role in the occurrence and development of diabetic cardiomyopathy (DCM). In the present study, we determined whether targeting MAPK/ERK pathway using MEK inhibitor U0126 could ameliorate DCM by regulating IRE1α-XBP1s pathway. Method: Three groups of 8-week-old C57/BL6J mice were studied: one group received saline injection as control (n=8) and two groups were made diabetic by streptozotocin (STZ) (n=10 each). 18 weeks after STZ injection and stable hyperglycemia, one group had saline treatment while the second group was treated with U0126 (1mg/kg/day), 8 weeks later, all groups were sacrificed. Cardiac function/histopathological changes were determined by echocardiogram examination, Millar catheter system, hematoxylin-eosin staining and western blot analysis. H9C2 cardiomyocytes were employed for in vitro studies. Results: Echocardiographic, hemodynamic and histological data showed overt myocardial hypertrophy and worsened cardiac function in diabetic mice. Chronic diabetic milieu enhanced SUMOylation and impaired nuclear translocation of XBP1s. Intriguingly, U0126 treatment significantly ameliorated progression of DCM, and this protective effect was achieved through enriching XBP1s' nuclear accumulation. Mechanistically, U0126 inhibited XBP1s' phosphorylation on S348 and SUMOylation on K276 promoting XBP1s' nuclear translocation. Collectively, these results identify that MEK inhibition restores XBP1s-dependent UPR and protects against diabetes-induced cardiac remodeling. Conclusion: The current study identifies previously unknown function of MEK/ERK pathway in regulation of ER-stress in DCM. U0126 could be a therapeutic target for the treatment of DCM.
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Affiliation(s)
- Tao Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China.,Department of Cardiology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong, 261000, PR China
| | - Jinhua Wu
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China.,Departments of Respiratory and Critical Care Medicine, Guangdong Provincial People's Hospital, Guangzhou, 510000, PR China
| | - Wei Dong
- Hepatic Surgery Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China.,Hubei Key Laboratory of Hepato-Pancreato-Biliary Diseases, Wuhan, Hubei, 430030, PR China.,Hubei Clinical Medicine Research Center of Hepatic Surgery, Wuhan, Hubei, 430030, PR China.,Key Laboratory of Organ Transplantation, Ministry of Education; NHC Key Laboratory of Organ Transplantation; Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan, Hubei, 430030, PR China
| | - Mengwen Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Xiaodan Zhong
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Wenjun Zhang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Lei Dai
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Yang Xie
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Yujian Liu
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Xingwei He
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Wanjun Liu
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Thati Madhusudhan
- Center for Thrombosis and Hemostasis, University Medical Center Mainz, Langenbeckstr. 1, 55131 Mainz, Germany
| | - Hesong Zeng
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
| | - Hongjie Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, PR China; Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, PR China
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Park SM, Kang TI, So JS. Roles of XBP1s in Transcriptional Regulation of Target Genes. Biomedicines 2021; 9:biomedicines9070791. [PMID: 34356855 PMCID: PMC8301375 DOI: 10.3390/biomedicines9070791] [Citation(s) in RCA: 75] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/03/2021] [Accepted: 07/05/2021] [Indexed: 12/17/2022] Open
Abstract
The spliced form of X-box binding protein 1 (XBP1s) is an active transcription factor that plays a vital role in the unfolded protein response (UPR). Under endoplasmic reticulum (ER) stress, unspliced Xbp1 mRNA is cleaved by the activated stress sensor IRE1α and converted to the mature form encoding spliced XBP1 (XBP1s). Translated XBP1s migrates to the nucleus and regulates the transcriptional programs of UPR target genes encoding ER molecular chaperones, folding enzymes, and ER-associated protein degradation (ERAD) components to decrease ER stress. Moreover, studies have shown that XBP1s regulates the transcription of diverse genes that are involved in lipid and glucose metabolism and immune responses. Therefore, XBP1s has been considered an important therapeutic target in studying various diseases, including cancer, diabetes, and autoimmune and inflammatory diseases. XBP1s is involved in several unique mechanisms to regulate the transcription of different target genes by interacting with other proteins to modulate their activity. Although recent studies discovered numerous target genes of XBP1s via genome-wide analyses, how XBP1s regulates their transcription remains unclear. This review discusses the roles of XBP1s in target genes transcriptional regulation. More in-depth knowledge of XBP1s target genes and transcriptional regulatory mechanisms in the future will help develop new therapeutic targets for each disease.
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Wang N, Ma J, Ma Y, Lu L, Ma C, Qin P, Gao E, Zuo M, Yang J, Yang L. Electroacupuncture Pretreatment Mitigates Myocardial Ischemia/Reperfusion Injury via XBP1/GRP78/Akt Pathway. Front Cardiovasc Med 2021; 8:629547. [PMID: 34195232 PMCID: PMC8236521 DOI: 10.3389/fcvm.2021.629547] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 04/09/2021] [Indexed: 11/29/2022] Open
Abstract
Myocardial ischemia/reperfusion injury is a common clinical problem and can result in severe cardiac dysfunction. Previous studies have demonstrated the protection of electroacupuncture against myocardial ischemia/reperfusion injury. However, the role of X-box binding protein I (XBP1) signaling pathway in the protection of electroacupuncture was still elusive. Thus, we designed this study and demonstrated that electroacupuncture significantly improved cardiac function during myocardial ischemia/reperfusion injury and reduced cardiac infarct size. Electroacupuncture treatment further inhibited cardiac injury manifested by the decrease of the activities of serum lactate dehydrogenase and creatine kinase-MB. The results also revealed that electroacupuncture elevated the expressions of XBP1, glucose-regulated protein 78 (GRP78), Akt, and Bcl-2 and decreased the Bax and cleaved Caspase 3 expressions. By using the inhibitor of XBP1 in vitro, the results revealed that suppression of XBP1 expression could markedly increase the activities of lactate dehydrogenase and creatine kinase-MB and cell apoptosis, thus exacerbating stimulated ischemia/reperfusion-induced H9c2 cell injury. Compared with stimulated ischemia/reperfusion group, inhibition of XBP1 inhibited the downstream GRP78 and Akt expressions during stimulated ischemia/reperfusion injury. Collectively, our data demonstrated that electroacupuncture treatment activated XBP1/GRP78/Akt signaling to protect hearts from myocardial ischemia/reperfusion injury. These findings revealed the underlying mechanisms of electroacupuncture protection against myocardial ischemia/reperfusion injury and may provide novel therapeutic targets for the clinical treatment of myocardial ischemia/reperfusion injury.
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Affiliation(s)
- Nisha Wang
- Department of Anesthesiology, Xi'an Children's Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Jipeng Ma
- Department of Cardiovascular Surgery, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Yan Ma
- Department of Anaesthesiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing, China
| | - Linhe Lu
- Department of Cardiovascular Surgery, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Chao Ma
- Department of Anesthesiology, Xi'an Children's Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Pei Qin
- Department of Anesthesiology, Xi'an Children's Hospital, Xi'an Jiaotong University, Xi'an, China
| | - Erhe Gao
- Center for Translational Medicine, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Mingzhang Zuo
- Department of Anaesthesiology, Beijing Hospital, National Center of Gerontology, Institute of Geriatric Medicine, Chinese Academy of Medical Science, Beijing, China
| | - Jian Yang
- Department of Cardiovascular Surgery, Xijing Hospital, Air Force Medical University, Xi'an, China
| | - Lifang Yang
- Department of Anesthesiology, Xi'an Children's Hospital, Xi'an Jiaotong University, Xi'an, China
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20
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Li W, Wang Y, Zhu L, Du S, Mao J, Wang Y, Wang S, Bo Q, Tu Y, Yi Q. The P300/ XBP1s/Herpud1 axis promotes macrophage M2 polarization and the development of choroidal neovascularization. J Cell Mol Med 2021; 25:6709-6720. [PMID: 34057287 PMCID: PMC8278076 DOI: 10.1111/jcmm.16673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 04/20/2021] [Accepted: 05/10/2021] [Indexed: 12/14/2022] Open
Abstract
Neovascular age‐related macular degeneration (AMD), which is characterized by choroidal neovascularization (CNV), leads to vision loss. M2 macrophages produce vascular endothelial growth factor (VEGF), which aggravates CNV formation. The histone acetyltransferase p300 enhances the stability of spliced X‐box binding protein 1 (XBP1s) and promotes the transcriptional activity of the XBP1s target gene homocysteine inducible endoplasmic reticulum protein with ubiquitin‐like domain 1 (Herpud1). Herpud1 promotes the M2 polarization of macrophages. This study aimed to explore the roles of the p300/XBP1s/Herpud1 axis in the polarization of macrophages and the pathogenesis of CNV. Hypoxia‐induced p300 interacted with XBP1s to acetylate XBP1s in RAW264.7 cells. Additionally, hypoxia‐induced p300 enhanced the XBP‐1s‐mediated unfolded protein response (UPR), alleviated the proteasome‐dependent degradation of XBP1s and enhanced the transcriptional activity of XBP1s for Herpud1. The hypoxia‐induced p300/XBP1s/Herpud1 axis facilitated RAW264.7 cell M2 polarization. Knockdown of the p300/XBP1s/Herpud1 axis in RAW264.7 cells inhibited the proliferation, migration and tube formation of mouse choroidal endothelial cells (MCECs). The p300/XBP1s/Herpud1 axis increased in infiltrating M2‐type macrophages in mouse laser‐induced CNV lesions. Blockade of the p300/XBP1s/Herpud1 axis inhibited macrophage M2 polarization and alleviated CNV lesions. Our study demonstrated that the p300/XBP1s/Herpud1 axis in infiltrating macrophages increased the M2 polarization of macrophages and the development of CNV.
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Affiliation(s)
- Wendie Li
- Department of Ophthalmology, Ningbo Eye Hospital, Ningbo, China
| | - Ying Wang
- Department of Ophthalmology, Suzhou Municipal Hospital, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, China
| | - Linling Zhu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, China
| | - Shu Du
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, China
| | - Jinghai Mao
- Department of Ophthalmology, Ningbo Eye Hospital, Ningbo, China
| | - Yanyan Wang
- Department of Ophthalmology, Ningbo Eye Hospital, Ningbo, China
| | - Sangsang Wang
- Department of Ophthalmology, Ningbo Eye Hospital, Ningbo, China
| | - Qingyun Bo
- Department of Ophthalmology, Ningbo Eye Hospital, Ningbo, China
| | - Yuanyuan Tu
- Department of Ophthalmology, Lixiang Eye Hospital of Soochow University, Suzhou, China
| | - QuanYong Yi
- Department of Ophthalmology, Ningbo Eye Hospital, Ningbo, China
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21
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Yang W, Xu X, Xu M, Zhou J, Xi Z, Guo H, Ming J, Huang T. XBP1s Acts as a Tumor Suppressor to Inhibit the EMT Process and Metastasis of Papillary Thyroid Cancer. Onco Targets Ther 2021; 14:2339-2348. [PMID: 33854332 PMCID: PMC8039847 DOI: 10.2147/ott.s297046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 03/19/2021] [Indexed: 01/21/2023] Open
Abstract
Purpose Papillary thyroid cancer (PTC) patients could obtain poor prognosis if they have lymph node metastasis, identification of informative and robust biomarkers for predicting cervical lymph node metastasis is critical for improving clinical decision-making and patient prognosis. Materials and Methods In this study, we analyzed the expression of X box binding protein 1 spliced-form (XBP1s) in 41 PTC tissue samples and extended our findings using public databases, then we investigated how XBP1s’ contributed to PTC progression in vitro. Results We found that XBP1s’ expression was lower in PTC patients with cervical lymph node metastasis than non-metastasis patients by immunohistochemical analysis. With publicly accessible dataset, we showed that the XBP1 transcription was significantly decreased in thyroid cancer (TC) tissues with lymph node metastasis as compared to that without lymph node metastasis. Moreover, we also found that XBP1 expression was significantly correlated with patients’ gender, T classification, lymph node metastasis and PTC stages, and low XBP1 expression was associated with poor diseases free survival (DFS). In vitro, XBP1s overexpression could inhibit the invasion, migration, and wound healing capacity of PTC cells. Mechanistically, overexpression of XBP1s could enhance the expression of classical epithelial–mesenchymal transition (EMT) markers such as ZO-1 and E-cadherins, and downregulated N-cadherin in BCPAP cells. Conclusion These findings suggest that XBP1s is a prognostic maker for thyroid carcinoma patients, and sustaining XBP1s expression might be a new strategy to control PTC progression.
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Affiliation(s)
- Wen Yang
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Xia Xu
- Department of Pathology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Ming Xu
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Jun Zhou
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Zihan Xi
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Hui Guo
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Jie Ming
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Tao Huang
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, People's Republic of China
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Bartoszewska S, Króliczewski J, Crossman DK, Pogorzelska A, Bagiński M, Collawn JF, Bartoszewski R. Triazoloacridone C-1305 impairs XBP1 splicing by acting as a potential IRE1α endoribonuclease inhibitor. Cell Mol Biol Lett 2021; 26:11. [PMID: 33730996 DOI: 10.1186/s11658-021-00255-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 03/09/2021] [Indexed: 02/06/2023] Open
Abstract
Inositol requiring enzyme 1 alpha (IRE1α) is one of three signaling sensors in the unfolding protein response (UPR) that alleviates endoplasmic reticulum (ER) stress in cells and functions to promote cell survival. During conditions of irrevocable stress, proapoptotic gene expression is induced to promote cell death. One of the three signaling stressors, IRE1α is an serine/threonine-protein kinase/endoribonuclease (RNase) that promotes nonconventional splicing of XBP1 mRNA that is translated to spliced XBP1 (XBP1s), an active prosurvival transcription factor. Interestingly, elevated IRE1α and XBP1s are both associated with poor cancer survival and drug resistance. In this study, we used next-generation sequencing analyses to demonstrate that triazoloacridone C-1305, a microtubule stabilizing agent that also has topoisomerase II inhibitory activity, dramatically decreases XBP1s mRNA levels and protein production during ER stress conditions, suggesting that C-1305 does this by decreasing IRE1α’s endonuclease activity.
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23
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Zhang W, Cao D, Wang M, Wu Y, Gong J, Li J, Liu Y. XBP1s repression regulates Kupffer cell polarization leading to immune suppressive effects protecting liver allograft in rats. Int Immunopharmacol 2021; 91:107294. [PMID: 33395585 DOI: 10.1016/j.intimp.2020.107294] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/30/2020] [Accepted: 12/08/2020] [Indexed: 12/27/2022]
Abstract
BACKGROUND Polarized kupffer cells (KCs) influence the immune response after liver transplantation. We report an undiscovered immune regulatory role of X-box binding protein 1 (XBP1) on immune function of kupffer cells (KCs). METHODS Acute rejection model using rats. RESULTS We found that suppression of XBP1s in lipopolysaccharide (LPS) -activated KCs could increase the expression of arginase-1 (Arg-1) and CD204 but also decrease the expression levels of MHC-II and CD40 and shift the phenotype markers of KCs toward M2 via the janus kinase (JAK) 3- Signal Transducer And Activator Of Transcription (STAT) 6 pathway, presenting an immunosuppressive function by enhancing anti-inflammatory cytokine secretion and accelerating apoptosis of activated T cells. XBP1s over-expression in KCs shift the phenotype markers on KCs towards M1 via the JAK1-STAT1 pathway and have shown a strong pro-inflammatory property. Down-regulation of XBP1s in KCs changed the phenotype and cytokine secretion profile towards M2 and markedly protected the function and structure of allograft liver, prolonging the recipient's survival compared with control and normal saline groups in rats. CONCLUSIONS Our findings reveal a novel regulatory mechanism of XBP1 in an induced immuno-suppressive state to protect rat's liver allograft via JAK-STAT mediated KCs polarization.
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Affiliation(s)
- Weikang Zhang
- Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430022, China
| | - Ding Cao
- Chongqing Key Laboratory of Hepatobiliary Surgery and Department of Hepatobiliary Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, China.
| | - Menghao Wang
- Chongqing Key Laboratory of Hepatobiliary Surgery and Department of Hepatobiliary Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, China
| | - Yakun Wu
- Chongqing Key Laboratory of Hepatobiliary Surgery and Department of Hepatobiliary Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, China
| | - Jianping Gong
- Chongqing Key Laboratory of Hepatobiliary Surgery and Department of Hepatobiliary Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, China
| | - Jingzheng Li
- Chongqing Key Laboratory of Hepatobiliary Surgery and Department of Hepatobiliary Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, China
| | - Yiming Liu
- Chongqing Key Laboratory of Hepatobiliary Surgery and Department of Hepatobiliary Surgery, Second Affiliated Hospital, Chongqing Medical University, Chongqing 400010, China.
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Ballance H, Zhu B. Revealing the hidden reality of the mammalian 12-h ultradian rhythms. Cell Mol Life Sci 2021; 78:3127-40. [PMID: 33449146 DOI: 10.1007/s00018-020-03730-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Revised: 11/18/2020] [Accepted: 12/04/2020] [Indexed: 12/29/2022]
Abstract
Biological oscillations often cycle at different harmonics of the 24-h circadian rhythms, a phenomenon we coined "Musica Universalis" in 2017. Like the circadian rhythm, the 12-h oscillation is also evolutionarily conserved, robust, and has recently gained new traction in the field of chronobiology. Originally thought to be regulated by the circadian clock and/or environmental cues, recent new evidences support the notion that the majority of 12-h rhythms are regulated by a distinct and cell-autonomous pacemaker that includes the unfolded protein response (UPR) transcription factor spliced form of XBP1 (XBP1s). 12-h cycle of XBP1s level in turn transcriptionally generates robust 12-h rhythms of gene expression enriched in the central dogma information flow (CEDIF) pathway. Given the regulatory and functional separation of the 12-h and circadian clocks, in this review, we will focus our attention on the mammalian 12-h pacemaker, and discuss our current understanding of its prevalence, evolutionary origin, regulation, and functional roles in both physiological and pathological processes.
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Abstract
Bromodomain is a conserved structural module found in many chromatin-associated proteins. Bromodomain-containing protein 7 (BRD7) is a member of the bromodomain-containing protein family, and was discovered two decades ago as a protein that is downregulated in nasopharyngeal carcinoma. Since then, BRD7 has been implicated in a variety of cellular processes, including chromatin remodeling, transcriptional regulation, and cell cycle progression. Decreased BRD7 activity underlies the pathophysiological properties of various diseases in different organs. BRD7 plays an important role in the pathogenesis of many cancers and, more recently, its roles in the regulation of metabolism and obesity have also been highlighted. Here, we review the involvement of BRD7 in a variety of pathophysiological conditions, with a focus on glucose homeostasis, obesity, and cancer.
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Affiliation(s)
- Sang Won Park
- Division of Endocrinology, Boston Children’s Hospital, Boston, MA 02115, USA;
- Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA
- Correspondence:
| | - Junsik M. Lee
- Division of Endocrinology, Boston Children’s Hospital, Boston, MA 02115, USA;
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26
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Zhang J, Liu Q, Pang Y, Xu X, Cui K, Zhang Y, Mai K, Ai Q. Molecular cloning and the involvement of IRE1α- XBP1s signaling pathway in palmitic acid induced - Inflammation in primary hepatocytes from large yellow croaker (Larimichthys crocea). Fish Shellfish Immunol 2020; 98:112-121. [PMID: 31904542 DOI: 10.1016/j.fsi.2019.12.089] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 12/23/2019] [Accepted: 12/28/2019] [Indexed: 06/10/2023]
Abstract
Apart from mitigating endoplasmic reticulum (ER) stress, vast studies have demonstrated the crucial role of inositol-requiring transmembrane kinase and endonuclease 1α (IRE1α) - spliced X-box binding protein 1 (XBP1s) signaling pathway in inflammatory response in mammals. In addition, palmitic acid (PA)-induced inflammation has been verified in large yellow croaker (Larimichthys crocea). However, whether the IRE1α-XBP1s signaling pathway is involved in inflammatory response caused by PA remains poorly studied in fish. The present study was aimed at elucidating the role of the IRE1α-XBP1s signaling pathway in inflammatory response induced by PA in primary hepatocytes from large yellow croaker. In the present study, the full-length cDNA of ire1α and xbp1s were cloned and comprised 3793 bp and 1789 bp with an open reading frame of 3279 bp and 1170 bp, encoding 1093 and 390 amino acids, respectively. IRE1α protein possessed a protein kinase and endoribonuclease domain and XBP1s protein possessed a basic-leucine zipper domain. The IRE1α protein and XBP1s protein located to the ER membrane and nucleus respectively. The ire1α and xbp1s were widely transcribed in various tissues with the higher level in intestine, liver, adipose and head kidney. The ER stress-inducing agent tunicamycin (Tm) and PA treatment significantly activated the IRE1α-XBP1s signaling pathway and increased the pro-inflammatory genes expression including tumor necrosis factor α (tnfα), interleukin 6 (il-6) and interleukin 1β (il-1β) (P < 0.05). When KIRA6, the IRE1α kinase inhibitor, was used to block the IRE1α-XBP1s signaling pathway, the Tm and PA-induced pro-inflammatory genes expression was significantly suppressed (P < 0.05). These data indicated that the IRE1α-XBP1s signaling pathway was involved in the PA-induced inflammatory response in large yellow croaker.
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Affiliation(s)
- Junzhi Zhang
- Key Laboratory of Aquaculture Nutritional and Feed (Ministry of Agriculture), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, PR China
| | - Qiangde Liu
- Key Laboratory of Aquaculture Nutritional and Feed (Ministry of Agriculture), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, PR China
| | - Yuning Pang
- Key Laboratory of Aquaculture Nutritional and Feed (Ministry of Agriculture), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, PR China
| | - Xiang Xu
- Key Laboratory of Aquaculture Nutritional and Feed (Ministry of Agriculture), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, PR China
| | - Kun Cui
- Key Laboratory of Aquaculture Nutritional and Feed (Ministry of Agriculture), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, PR China
| | - Yanjiao Zhang
- Key Laboratory of Aquaculture Nutritional and Feed (Ministry of Agriculture), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, PR China
| | - Kangsen Mai
- Key Laboratory of Aquaculture Nutritional and Feed (Ministry of Agriculture), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, PR China
| | - Qinghui Ai
- Key Laboratory of Aquaculture Nutritional and Feed (Ministry of Agriculture), Key Laboratory of Mariculture (Ministry of Education), Ocean University of China, 5 Yushan Road, Qingdao, Shandong, 266003, PR China.
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27
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Lindner P, Christensen SB, Nissen P, Møller JV, Engedal N. Cell death induced by the ER stressor thapsigargin involves death receptor 5, a non-autophagic function of MAP1LC3B, and distinct contributions from unfolded protein response components. Cell Commun Signal 2020; 18:12. [PMID: 31987044 PMCID: PMC6986015 DOI: 10.1186/s12964-019-0499-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 12/16/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Cell death triggered by unmitigated endoplasmic reticulum (ER) stress plays an important role in physiology and disease, but the death-inducing signaling mechanisms are incompletely understood. To gain more insight into these mechanisms, the ER stressor thapsigargin (Tg) is an instrumental experimental tool. Additionally, Tg forms the basis for analog prodrugs designed for cell killing in targeted cancer therapy. Tg induces apoptosis via the unfolded protein response (UPR), but how apoptosis is initiated, and how individual effects of the various UPR components are integrated, is unclear. Furthermore, the role of autophagy and autophagy-related (ATG) proteins remains elusive. METHODS To systematically address these key questions, we analyzed the effects of Tg and therapeutically relevant Tg analogs in two human cancer cell lines of different origin (LNCaP prostate- and HCT116 colon cancer cells), using RNAi and inhibitory drugs to target death receptors, UPR components and ATG proteins, in combination with measurements of cell death by fluorescence imaging and propidium iodide staining, as well as real-time RT-PCR and western blotting to monitor caspase activity, expression of ATG proteins, UPR components, and downstream ER stress signaling. RESULTS In both cell lines, Tg-induced cell death depended on death receptor 5 and caspase-8. Optimal cytotoxicity involved a non-autophagic function of MAP1LC3B upstream of procaspase-8 cleavage. PERK, ATF4 and CHOP were required for Tg-induced cell death, but surprisingly acted in parallel rather than as a linear pathway; ATF4 and CHOP were independently required for Tg-mediated upregulation of death receptor 5 and MAP1LC3B proteins, whereas PERK acted via other pathways. Interestingly, IRE1 contributed to Tg-induced cell death in a cell type-specific manner. This was linked to an XBP1-dependent activation of c-Jun N-terminal kinase, which was pro-apoptotic in LNCaP but not HCT116 cells. Molecular requirements for cell death induction by therapy-relevant Tg analogs were identical to those observed with Tg. CONCLUSIONS Together, our results provide a new, integrated understanding of UPR signaling mechanisms and downstream mediators that induce cell death upon Tg-triggered, unmitigated ER stress. Video Abstract.
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Affiliation(s)
- Paula Lindner
- Centre for Molecular Medicine Norway (NCMM), Nordic EMBL Partnership for Molecular Medicine, University of Oslo, P.O. Box 1137, Blindern, N-0318 Oslo, Norway
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic EMBL Partnership for Molecular Medicine, Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | | | - Poul Nissen
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic EMBL Partnership for Molecular Medicine, Department of Molecular Biology and Genetics, Aarhus University, Aarhus, Denmark
| | | | - Nikolai Engedal
- Centre for Molecular Medicine Norway (NCMM), Nordic EMBL Partnership for Molecular Medicine, University of Oslo, P.O. Box 1137, Blindern, N-0318 Oslo, Norway
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Rodrigo S, Panadero MI, Fauste E, Rodríguez L, Roglans N, Álvarez-Millán JJ, Otero P, Laguna JC, Bocos C. Effects of Maternal Fructose Intake on Perinatal ER-Stress: A Defective XBP1s Nuclear Translocation Affects the ER-stress Resolution. Nutrients 2019; 11:nu11081935. [PMID: 31426466 PMCID: PMC6723662 DOI: 10.3390/nu11081935] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2019] [Revised: 08/13/2019] [Accepted: 08/15/2019] [Indexed: 12/31/2022] Open
Abstract
Endoplasmic reticulum (ER) homeostasis is crucial to appropriate cell functioning, and when disturbed, a safeguard system called unfolded protein response (UPR) is activated. Fructose consumption modifies ER homeostasis and has been related to metabolic syndrome. However, fructose sweetened beverages intake is allowed during gestation. Therefore, we investigate whether maternal fructose intake affects the ER status and induces UPR. Thus, administrating liquid fructose (10% w/v) to pregnant rats partially activated the ER-stress in maternal and fetal liver and placenta. In fact, a fructose-induced increase in the levels of pIRE1 (phosphorylated inositol requiring enzyme-1) and its downstream effector, X-box binding protein-1 spliced form (XBP1s), was observed. XBP1s is a key transcription factor, however, XBP1s nuclear translocation and the expression of its target genes were reduced in the liver of the carbohydrate-fed mothers, and specifically diminished in the fetal liver and placenta in the fructose-fed mothers. These XBP1s target genes belong to the ER-associated protein degradation (ERAD) system, used to buffer ER-stress and to restore ER-homeostasis. It is known that XBP1s needs to form a complex with diverse proteins to migrate into the nucleus. Since methylglyoxal (MGO) content, a precursor of advanced glycation endproducts (AGE), was augmented in the three tissues in the fructose-fed mothers and has been related to interfere with the functioning of many proteins, the role of MGO in XBP1s migration should not be discarded. In conclusion, maternal fructose intake produces ER-stress, but without XBP1s nuclear migration. Therefore, a complete activation of UPR that would resolve ER-stress is lacking. A state of fructose-induced oxidative stress is probably involved.
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Affiliation(s)
- Silvia Rodrigo
- Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
| | - María I Panadero
- Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
| | - Elena Fauste
- Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
| | - Lourdes Rodríguez
- Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
| | - Núria Roglans
- Facultad de Farmacia, Universidad de Barcelona, CIBERobn, IBUB, Avda. Joan XXIII 27-31, 08028 Barcelona, Spain
| | | | - Paola Otero
- Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain
| | - Juan C Laguna
- Facultad de Farmacia, Universidad de Barcelona, CIBERobn, IBUB, Avda. Joan XXIII 27-31, 08028 Barcelona, Spain
| | - Carlos Bocos
- Facultad de Farmacia, Universidad San Pablo-CEU, CEU Universities, Montepríncipe, Boadilla del Monte, 28668 Madrid, Spain.
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Sun S, Kelekar S, Kliewer SA, Mangelsdorf DJ. The orphan nuclear receptor SHP regulates ER stress response by inhibiting XBP1s degradation. Genes Dev 2019; 33:1083-1094. [PMID: 31296559 PMCID: PMC6672048 DOI: 10.1101/gad.326868.119] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 06/07/2019] [Indexed: 02/06/2023]
Abstract
In this study, Sun et al. investigated the role of the orphan nuclear receptor SHP, a well-known transcriptional corepressor of bile acid and lipid metabolism in the liver, in other tissues. They report that SHP functions as a regulator of ER stress in the exocrine pancreas, specifically via the regulation of XBP1s stability. The orphan nuclear receptor SHP (small heterodimer partner) is a well-known transcriptional corepressor of bile acid and lipid metabolism in the liver; however, its function in other tissues is poorly understood. Here, we report an unexpected role for SHP in the exocrine pancreas as a modulator of the endoplasmic reticulum (ER) stress response. SHP expression is induced in acinar cells in response to ER stress and regulates the protein stability of the spliced form of X-box-binding protein 1 (XBP1s), a key mediator of ER stress response. Loss of SHP reduces XBP1s protein level and transcriptional activity, which in turn attenuates the ER stress response during the fasting–feeding cycle. Consequently, SHP-deficient mice also are more susceptible to cerulein-induced pancreatitis. Mechanistically, we show that SHP physically interacts with the transactivation domain of XBP1s, thereby inhibiting the polyubiquitination and degradation of XBP1s by the Cullin3–SPOP (speckle-type POZ protein) E3 ligase complex. Together, our data implicate SHP in governing ER homeostasis and identify a novel posttranslational regulatory mechanism for the key ER stress response effector XBP1.
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Affiliation(s)
- Shengyi Sun
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Sherwin Kelekar
- Children's Medical Center Research Institute, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - Steven A Kliewer
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
| | - David J Mangelsdorf
- Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA.,Howard Hughes Medical Institute, University of Texas Southwestern Medical Center, Dallas, Texas 75390, USA
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30
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Zhang X, Hu P, Ding SY, Sun T, Liu L, Han S, DeLeo AB, Sadagopan A, Guo W, Wang X. Induction of autophagy-dependent apoptosis in cancer cells through activation of ER stress: an uncovered anti-cancer mechanism by anti-alcoholism drug disulfiram. Am J Cancer Res 2019; 9:1266-1281. [PMID: 31285958 PMCID: PMC6610050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Accepted: 05/25/2019] [Indexed: 06/09/2023] Open
Abstract
UNLABELLED Due to its potent anticancer activity, there is interest in repurposing of the FDA-approved anti-alcoholism drug, disulfiram (DSF). DSF forms potent complexes with copper (DSF/Cu) that induce apoptosis of many types of cancer cells. Here, we investigated the role of DSF/Cu in autophagy, a mechanism of cell death or survival, and its interplay with DSF/Cu induced apoptosis of human pancreatic and breast cancer cells. METHODS Levels of autophagy and apoptosis were assessed by Western blot, flow cytometry and immunofluorescence analysis. Cell viability was measured by MTT assays. Activation of inositol-requiring enzyme 1α (IRE1α)-mRNA X-box binding protein 1 (XBP1) pathway and spliced XBP1 (XBP1s) expression were analyzed by Western blot, Phos-tag gel assay, RT-PCR, qRT-PCR and flow cytometry. RESULTS The apoptosis induced by DSF/Cu in pancreatic and breast cancer cells is autophagy dependent. This is accomplished by activating IRE1α, the sensor of unfolded protein response (UPR) via promotion of phosphorylation of IRE1α and its downstream XBP1 splicing into active XBP1s. CONCLUSIONS DSF/Cu induces ER-stress through activation of IRE1α-XBP1 pathway which is responsible, at least in part, for induction of autophagy-dependent apoptosis of cancer cells. Insight into the ER-stress inducing ability by DSF/Cu may open a new research area for rational design of innovative therapeutic strategies for pancreatic and breast cancers.
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Affiliation(s)
- Xiao Zhang
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
- Key Laboratory of Antibody Technology, National Health Commission, Nanjing Medical UniversityNanjing, Jiangsu, China
| | - Pan Hu
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Shi-Ying Ding
- Department of Orthopaedic Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Ting Sun
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Ling Liu
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Shiwei Han
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Albert B DeLeo
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Ananthan Sadagopan
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Wei Guo
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
| | - Xinhui Wang
- Division of Surgical Oncology, Department of Surgery, Massachusetts General Hospital, Harvard Medical SchoolBoston, MA, USA
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31
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Liu L, Cai J, Wang H, Liang X, Zhou Q, Ding C, Zhu Y, Fu T, Guo Q, Xu Z, Xiao L, Liu J, Yin Y, Fang L, Xue B, Wang Y, Meng ZX, He A, Li JL, Liu Y, Chen XW, Gan Z. Coupling of COPII vesicle trafficking to nutrient availability by the IRE1α- XBP1s axis. Proc Natl Acad Sci U S A 2019; 116:11776-85. [PMID: 31123148 DOI: 10.1073/pnas.1814480116] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The cytoplasmic coat protein complex-II (COPII) is evolutionarily conserved machinery that is essential for efficient trafficking of protein and lipid cargos. How the COPII machinery is regulated to meet the metabolic demand in response to alterations of the nutritional state remains largely unexplored, however. Here, we show that dynamic changes of COPII vesicle trafficking parallel the activation of transcription factor X-box binding protein 1 (XBP1s), a critical transcription factor in handling cellular endoplasmic reticulum (ER) stress in both live cells and mouse livers upon physiological fluctuations of nutrient availability. Using live-cell imaging approaches, we demonstrate that XBP1s is sufficient to promote COPII-dependent trafficking, mediating the nutrient stimulatory effects. Chromatin immunoprecipitation (ChIP) coupled with high-throughput DNA sequencing (ChIP-seq) and RNA-sequencing analyses reveal that nutritional signals induce dynamic XBP1s occupancy of promoters of COPII traffic-related genes, thereby driving the COPII-mediated trafficking process. Liver-specific disruption of the inositol-requiring enzyme 1α (IRE1α)-XBP1s signaling branch results in diminished COPII vesicle trafficking. Reactivation of XBP1s in mice lacking hepatic IRE1α restores COPII-mediated lipoprotein secretion and reverses the fatty liver and hypolipidemia phenotypes. Thus, our results demonstrate a previously unappreciated mechanism in the metabolic control of liver protein and lipid trafficking: The IRE1α-XBP1s axis functions as a nutrient-sensing regulatory nexus that integrates nutritional states and the COPII vesicle trafficking.
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Plate L, Rius B, Nguyen B, Genereux JC, Kelly JW, Wiseman RL. Quantitative Interactome Proteomics Reveals a Molecular Basis for ATF6-Dependent Regulation of a Destabilized Amyloidogenic Protein. Cell Chem Biol 2019; 26:913-925.e4. [PMID: 31105062 DOI: 10.1016/j.chembiol.2019.04.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/14/2019] [Accepted: 03/31/2019] [Indexed: 12/24/2022]
Abstract
Activation of the unfolded protein response (UPR)-associated transcription factor ATF6 has emerged as a promising strategy to reduce the secretion and subsequent toxic aggregation of destabilized, amyloidogenic proteins implicated in systemic amyloid diseases. However, the molecular mechanism by which ATF6 activation reduces the secretion of amyloidogenic proteins remains poorly defined. We employ a quantitative interactomics platform to define how ATF6 activation reduces secretion of a destabilized, amyloidogenic immunoglobulin light chain (LC) associated with light-chain amyloidosis (AL). Using this platform, we show that ATF6 activation increases the targeting of this destabilized LC to a subset of pro-folding ER proteostasis factors that retains the amyloidogenic LC within the ER, preventing its secretion. Our results define a molecular basis for the ATF6-dependent reduction in destabilized LC secretion and highlight the advantage for targeting this UPR-associated transcription factor to reduce secretion of destabilized, amyloidogenic proteins implicated in AL and related systemic amyloid diseases.
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Affiliation(s)
- Lars Plate
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MB110, La Jolla, CA 92037, USA; Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Bibiana Rius
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MB110, La Jolla, CA 92037, USA
| | - Bianca Nguyen
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MB110, La Jolla, CA 92037, USA
| | - Joseph C Genereux
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MB110, La Jolla, CA 92037, USA; Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Jeffery W Kelly
- Department of Chemistry, The Scripps Research Institute, La Jolla, CA 92037, USA; The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - R Luke Wiseman
- Department of Molecular Medicine, The Scripps Research Institute, 10550 North Torrey Pines Road, MB110, La Jolla, CA 92037, USA.
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Medel B, Costoya C, Fernandez D, Pereda C, Lladser A, Sauma D, Pacheco R, Iwawaki T, Salazar-Onfray F, Osorio F. IRE1α Activation in Bone Marrow-Derived Dendritic Cells Modulates Innate Recognition of Melanoma Cells and Favors CD8 + T Cell Priming. Front Immunol 2019; 9:3050. [PMID: 30687308 PMCID: PMC6338037 DOI: 10.3389/fimmu.2018.03050] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2018] [Accepted: 12/10/2018] [Indexed: 12/12/2022] Open
Abstract
The IRE1α/XBP1s signaling pathway is an arm of the unfolded protein response (UPR) that safeguards the fidelity of the cellular proteome during endoplasmic reticulum (ER) stress, and that has also emerged as a key regulator of dendritic cell (DC) homeostasis. However, in the context of DC activation, the regulation of the IRE1α/XBP1s axis is not fully understood. In this work, we report that cell lysates generated from melanoma cell lines markedly induce XBP1s and certain members of the UPR such as the chaperone BiP in bone marrow derived DCs (BMDCs). Activation of IRE1α endonuclease upon innate recognition of melanoma cell lysates was required for amplification of proinflammatory cytokine production and was necessary for efficient cross-presentation of melanoma-associated antigens without modulating the MHC-II antigen presentation machinery. Altogether, this work provides evidence indicating that ex-vivo activation of the IRE1α/XBP1 pathway in BMDCs enhances CD8+ T cell specific responses against tumor antigens.
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Affiliation(s)
- Bernardita Medel
- Program of Immunology, Laboratory of Immunology and Cellular Stress, Faculty of Medicine, Institute of Biomedical Sciences, Universidad de Chile, Santiago, Chile.,Programa de Doctorado en Biotecnología, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Cristobal Costoya
- Program of Immunology, Laboratory of Immunology and Cellular Stress, Faculty of Medicine, Institute of Biomedical Sciences, Universidad de Chile, Santiago, Chile.,Millennium Institute on Immunology and Immunotherapy, Universidad de Chile, Santiago, Chile
| | - Dominique Fernandez
- Program of Immunology, Laboratory of Immunology and Cellular Stress, Faculty of Medicine, Institute of Biomedical Sciences, Universidad de Chile, Santiago, Chile
| | - Cristian Pereda
- Millennium Institute on Immunology and Immunotherapy, Universidad de Chile, Santiago, Chile.,Program of Immunology, Laboratory of Antitumor Immunity, Faculty of Medicine, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Alvaro Lladser
- Laboratory of Immunoncology, Fundacion Ciencia & Vida, Santiago, Chile
| | - Daniela Sauma
- Departamento de Biologia, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Rodrigo Pacheco
- Departamento de Ciencias Biológicas, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile.,Laboratorio de Neuroinmunología, Fundación Ciencia & Vida, Santiago, Chile
| | - Takao Iwawaki
- Division of Cell Medicine, Department of Life Science, Medical Research Institute, Kanazawa Medical University, Ishikawa, Japan
| | - Flavio Salazar-Onfray
- Millennium Institute on Immunology and Immunotherapy, Universidad de Chile, Santiago, Chile.,Program of Immunology, Laboratory of Antitumor Immunity, Faculty of Medicine, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Fabiola Osorio
- Program of Immunology, Laboratory of Immunology and Cellular Stress, Faculty of Medicine, Institute of Biomedical Sciences, Universidad de Chile, Santiago, Chile.,Millennium Institute on Immunology and Immunotherapy, Universidad de Chile, Santiago, Chile
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Zhang G, Wang X, Gillette TG, Deng Y, Wang ZV. Unfolded Protein Response as a Therapeutic Target in Cardiovascular Disease. Curr Top Med Chem 2019; 19:1902-1917. [PMID: 31109279 PMCID: PMC7024549 DOI: 10.2174/1568026619666190521093049] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 04/09/2019] [Accepted: 05/02/2019] [Indexed: 12/15/2022]
Abstract
Cardiovascular disease is the leading cause of death worldwide. Despite overwhelming socioeconomic impact and mounting clinical needs, our understanding of the underlying pathophysiology remains incomplete. Multiple forms of cardiovascular disease involve an acute or chronic disturbance in cardiac myocytes, which may lead to potent activation of the Unfolded Protein Response (UPR), a cellular adaptive reaction to accommodate protein-folding stress. Accumulation of unfolded or misfolded proteins in the Endoplasmic Reticulum (ER) elicits three signaling branches of the UPR, which otherwise remain quiescent. This ER stress response then transiently suppresses global protein translation, augments production of protein-folding chaperones, and enhances ER-associated protein degradation, with an aim to restore cellular homeostasis. Ample evidence has established that the UPR is strongly induced in heart disease. Recently, the mechanisms of action and multiple pharmacological means to favorably modulate the UPR are emerging to curb the initiation and progression of cardiovascular disease. Here, we review the current understanding of the UPR in cardiovascular disease and discuss existing therapeutic explorations and future directions.
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Affiliation(s)
- Guangyu Zhang
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Xiaoding Wang
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Thomas G. Gillette
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Yingfeng Deng
- Touchstone Diabetes Center, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
| | - Zhao V. Wang
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, Texas, United States
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Fink EE, Moparthy S, Bagati A, Bianchi-Smiraglia A, Lipchick BC, Wolff DW, Roll MV, Wang J, Liu S, Bakin AV, Kandel ES, Lee AH, Nikiforov MA. XBP1-KLF9 Axis Acts as a Molecular Rheostat to Control the Transition from Adaptive to Cytotoxic Unfolded Protein Response. Cell Rep 2018; 25:212-223.e4. [PMID: 30282030 PMCID: PMC6251307 DOI: 10.1016/j.celrep.2018.09.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/13/2018] [Accepted: 09/07/2018] [Indexed: 02/06/2023] Open
Abstract
Transcription factor XBP1s, activated by endoplasmic reticulum (ER) stress in a dose-dependent manner, plays a central role in adaptive unfolded protein response (UPR) via direct activation of multiple genes controlling protein refolding. Here, we report that elevation of ER stress above a critical threshold causes accumulation of XBP1s protein sufficient for binding to the promoter and activation of a gene encoding a transcription factor KLF9. In comparison to other XBP1s targets, KLF9 promoter contains an evolutionary conserved lower-affinity binding site that requires higher amounts of XBP1s for activation. In turn, KLF9 induces expression of two regulators of ER calcium storage, TMEM38B and ITPR1, facilitating additional calcium release from ER, exacerbation of ER stress, and cell death. Accordingly, Klf9 deficiency attenuates tunicamycin-induced ER stress in mouse liver. These data reveal a role for XBP1s in cytotoxic UPR and provide insights into mechanisms of life-or-death decisions in cells under ER stress.
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Affiliation(s)
- Emily E Fink
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Sudha Moparthy
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA; Department of Cancer Biology, Comprehensive Cancer Center of Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA
| | - Archis Bagati
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Anna Bianchi-Smiraglia
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Brittany C Lipchick
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA; Department of Cancer Biology, Comprehensive Cancer Center of Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA
| | - David W Wolff
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA; Department of Cancer Biology, Comprehensive Cancer Center of Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA
| | - Matthew V Roll
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA; Department of Cancer Biology, Comprehensive Cancer Center of Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA
| | - Jianmin Wang
- Department of Biostatistics and Bioinformatics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Song Liu
- Department of Biostatistics and Bioinformatics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Andrei V Bakin
- Department of Cancer Genetics and Genomics, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Eugene S Kandel
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
| | - Ann-Hwee Lee
- Department of Pathology and Laboratory Medicine, Weill Cornell Medical College, New York, NY 10065, USA
| | - Mikhail A Nikiforov
- Department of Cell Stress Biology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA; Department of Cancer Biology, Comprehensive Cancer Center of Wake Forest Baptist Medical Center, Winston-Salem, NC 27157, USA.
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Wu S, Du R, Gao C, Kang J, Wen J, Sun T. The role of XBP1s in the metastasis and prognosis of hepatocellular carcinoma. Biochem Biophys Res Commun 2018; 500:530-537. [PMID: 29627568 DOI: 10.1016/j.bbrc.2018.04.033] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 04/02/2018] [Accepted: 04/03/2018] [Indexed: 02/07/2023]
Abstract
Tumor metastasis and recurrence are the primary contributors to poor prognosis in patients with hepatocellular carcinoma (HCC). The epithelial-mesenchymal transition (EMT) of tumor cells is the predominant mechanism of HCC progression. XBP1s is a newly discovered molecule involved in the endoplasmic reticulum (ER) stressresponse, which is an adaptive response and defense mechanism in cells that enablessurvival under adverse conditions. Abnormally high XBP1sexpression has been found in tumor cells, but the role of XBP1sin HCC progression remains unclear. We found that the expression of XBP1s in HCC cell lines and tissuesamples was higher than that in control cells and tissuesamples. Clinicopathological analysis showed that the expression of XBP1s was closely correlated with distant metastasis and poor prognosis in HCC. In vivo and invitro experiments confirmed that the overexpression of XBP1s promoted EMT and metastasis in HCC cells. XBP1ssilencing attenuated cellular migration and development of the EMT phenotypein vitro. Through further study to elucidate the molecular mechanism underlying the promotion ofEMT by XBP1s in HCC cells, we confirmed that XBP1s could mediate the expression of Twist. In HCC cells, XBP1s enhanced the expression of Twist and Snail, resulting in a subsequent reduction in the expression of E-cadherin, a contributor to cell-cell adhesion. Overall, this study reveals a novel XBP1s/Twist/Snail axis that mediates EMT in HCC cells and the invasion and metastasis of HCC.
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Affiliation(s)
- Sudong Wu
- Second Military Medical University, Shanghai, China; Department of Radiation Oncology and Integrative Oncology, Navy General Hospital, Beijing, PR China
| | - Rui Du
- Department of Radiation Oncology and Integrative Oncology, Navy General Hospital, Beijing, PR China
| | - Chen Gao
- Chinese Center For Disease Control and Prevention, Beijing, China
| | - Jingbo Kang
- Department of Radiation Oncology and Integrative Oncology, Navy General Hospital, Beijing, PR China
| | - Juyi Wen
- Department of Radiation Oncology and Integrative Oncology, Navy General Hospital, Beijing, PR China
| | - Tao Sun
- NavyGeneralHospital, Beijing, PR China.
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Wang X, Xu L, Gillette TG, Jiang X, Wang ZV. The unfolded protein response in ischemic heart disease. J Mol Cell Cardiol 2018; 117:19-25. [PMID: 29470977 DOI: 10.1016/j.yjmcc.2018.02.013] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 02/10/2018] [Accepted: 02/17/2018] [Indexed: 12/28/2022]
Abstract
Ischemic heart disease is a severe stress condition that causes extensive pathological alterations and triggers cardiac cell death. Accumulating evidence suggests that the unfolded protein response (UPR) is strongly induced by myocardial ischemia. The UPR is an evolutionarily conserved cellular response to cope with protein-folding stress, from yeast to mammals. Endoplasmic reticulum (ER) transmembrane sensors detect the accumulation of unfolded proteins and stimulate a signaling network to accommodate unfolded and misfolded proteins. Distinct mechanisms participate in the activation of three major signal pathways, viz. protein kinase RNA-like ER kinase, inositol-requiring protein 1, and activating transcription factor 6, to transiently suppress protein translation, enhance protein folding capacity of the ER, and augment ER-associated degradation to refold denatured proteins and restore cellular homeostasis. However, if the stress is severe and persistent, the UPR elicits inflammatory and apoptotic pathways to eliminate terminally affected cells. The ER is therefore recognized as a vitally important organelle that determines cell survival or death. Recent studies indicate the UPR plays critical roles in the pathophysiology of ischemic heart disease. The three signaling branches may elicit distinct but overlapping effects in cardiac response to ischemia. Here, we outline the findings and discuss the mechanisms of action and therapeutic potentials of the UPR in the treatment of ischemic heart disease.
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Affiliation(s)
- Xiaoding Wang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China; Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Lin Xu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Thomas G Gillette
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Xuejun Jiang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei, China.
| | - Zhao V Wang
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.
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Wang M, Ruan S, Ming J, Dong F. Nuclear expression of XBP1s is correlated with breast cancer survival: a retrospective analysis based on tissue microarray. Onco Targets Ther 2017; 10:5927-5934. [PMID: 29276395 PMCID: PMC5732546 DOI: 10.2147/ott.s147102] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
An alternatively spliced transcription factor that participates in the unfolded protein response, XBP1 is a novel protein involved in cancer progression and outcome. This study aimed to investigate the relationship of spliced XBP1 (XBP1s) with the clinicopathological characteristics and prognosis of breast cancer by using tissue-microarray analysis. A consecutive series of 170 patients with breast cancer diagnosed between 2001 and 2004 in hospitals in eastern and southern China were included. Immunohistochemical staining for XBP1s was performed, and the expression of XBP1s was separately examined in nuclei and cytoplasm. We found that a higher expression of XBP1s in nuclei strongly correlated with poorer survival (46.7% versus 75%, P=0.018); however, the expression of XBP1s in the cytoplasm had no relationship with survival. Multivariate Cox regression analysis indicated that the expression of XBP1s was not an independent prognostic factor (RR 2.074, 95% CI 0.909–4.736; P=0.083). None of the other clinicopathological characteristics – age, pathology grade, T stage, N stage, TNM stage, estrogen receptor, progesterone receptor, or HER2 status – was found to be correlated with XBP1s expression in the nuclei. In conclusion, independently of other clinicopathological factors, the nuclear expression of XBP1s is correlated with shorter breast cancer survival; however, whether nuclear XBP1s is an independent prognostic biomarker needs to be confirmed by further studies with larger samples and detailed sample stratification.
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Affiliation(s)
- Mengyi Wang
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shengnan Ruan
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jie Ming
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Fang Dong
- Department of Breast and Thyroid Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Lee J, Salazar Hernández MA, Auen T, Mucka P, Lee J, Ozcan U. PGC-1α functions as a co-suppressor of XBP1s to regulate glucose metabolism. Mol Metab 2017; 7:119-131. [PMID: 29129613 PMCID: PMC5784318 DOI: 10.1016/j.molmet.2017.10.010] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2017] [Revised: 10/15/2017] [Accepted: 10/24/2017] [Indexed: 12/12/2022] Open
Abstract
Objective Peroxisome proliferator-activated receptor γ (PPARγ) coactivator-1α (PGC-1α) promotes hepatic gluconeogenesis by activating HNF4α and FoxO1. PGC-1α expression in the liver is highly elevated in obese and diabetic conditions, leading to increased hepatic glucose production. We previously showed that the spliced form of X-box binding protein 1 (XBP1s) suppresses FoxO1 activity and hepatic gluconeogenesis. The shared role of PGC-1α and XBP1s in regulating FoxO1 activity and gluconeogenesis led us to investigate the probable interaction between PGC-1α and XBP1s and its role in glucose metabolism. Methods We investigated the biochemical interaction between PGC-1α and XBP1s and examined the role of their interaction in glucose homeostasis using animal models. Results We show that PGC-1α interacts with XBP1s, which plays an anti-gluconeogenic role in the liver by suppressing FoxO1 activity. The physical interaction between PGC-1α and XBP1s leads to suppression of XBP1s activity rather than its activation. Upregulating PGC-1α expression in the liver of lean mice lessens XBP1s protein levels, and reducing PGC-1α levels in obese and diabetic mouse liver restores XBP1s protein induction. Conclusions Our findings reveal a novel function of PGC-1α as a suppressor of XBP1s function, suggesting that hepatic PGC-1α promotes gluconeogenesis through multiple pathways as a co-activator for HNF4α and FoxO1 and also as a suppressor for anti-gluconeogenic transcription factor XBP1s. XBP1s suppresses FoxO1 activity and hepatic gluconeogenesis. PGC-1α physically interacts with XBP1s and functions as a co-suppressor of XBP1s in the liver. The suppression of XBP1s activity by PGC-1α leads to impaired glucose homeostasis in obese mice. Hepatic PGC-1α promotes gluconeogenesis as a co-activator and also as a co-suppressor.
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Affiliation(s)
- Jaemin Lee
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA; Current address: Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, 42988, Republic of Korea.
| | | | - Thomas Auen
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Patrick Mucka
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Justin Lee
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Umut Ozcan
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.
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40
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Nandy A, Saenz-Méndez P, Gorman AM, Samali A, Eriksson LA. Homology model of the human tRNA splicing ligase RtcB. Proteins 2017; 85:1983-1993. [PMID: 28707320 DOI: 10.1002/prot.25352] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/28/2017] [Accepted: 07/11/2017] [Indexed: 12/25/2022]
Abstract
RtcB is an essential human tRNA ligase required for ligating the 2',3'-cyclic phosphate and 5'-hydroxyl termini of cleaved tRNA halves during tRNA splicing and XBP1 fragments during endoplasmic reticulum stress. Activation of XBP1 has been implicated in various human tumors including breast cancer. Here we present, for the first time, a homology model of human RtcB (hRtcB) in complex with manganese and covalently bound GMP built from the Pyrococcus horikoshii RtcB (bRtcB) crystal structure, PDB ID 4DWQA. The structure is analyzed in terms of stereochemical quality, folding reliability, secondary structure similarity with bRtcB, druggability of the active site binding pocket and its metal-binding microenvironment. In comparison with bRtcB, loss of a manganese-coordinating water and movement of Asn226 (Asn202 in 4DWQA) to form metal-ligand coordination, demonstrates the uniqueness of the hRtcB model. Rotation of GMP leads to the formation of an additional metal-ligand coordination (Mn-O). Umbrella sampling simulations of Mn binding in wild type and the catalytically inactive C122A mutant reveal a clear reduction of Mn binding ability in the mutant, thus explaining the loss of activity therein. Our results furthermore clearly show that the GTP binding site of the enzyme is a well-defined pocket that can be utilized as target site for in silico drug discovery.
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Affiliation(s)
- Argha Nandy
- Apoptosis Research Center, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Patricia Saenz-Méndez
- Department of Chemistry and Molecular Biology, University of Gothenburg, 405 30 Göteborg, Sweden.,Computational Chemistry and Biology Group, Facultad de Química, Universidad de la República, Montevideo, 11800, Uruguay
| | - Adrienne M Gorman
- Apoptosis Research Center, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Afshin Samali
- Apoptosis Research Center, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Leif A Eriksson
- Department of Chemistry and Molecular Biology, University of Gothenburg, 405 30 Göteborg, Sweden
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Zhu B, Zhang Q, Pan Y, Mace EM, York B, Antoulas AC, Dacso CC, O'Malley BW. A Cell-Autonomous Mammalian 12 hr Clock Coordinates Metabolic and Stress Rhythms. Cell Metab 2017; 25:1305-1319.e9. [PMID: 28591634 PMCID: PMC5526350 DOI: 10.1016/j.cmet.2017.05.004] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Revised: 12/11/2016] [Accepted: 05/18/2017] [Indexed: 02/08/2023]
Abstract
Besides circadian rhythms, oscillations cycling with a 12 hr period exist. However, the prevalence, origin, regulation, and function of mammalian 12 hr rhythms remain elusive. Utilizing an unbiased mathematical approach identifying all superimposed oscillations, we uncovered prevalent 12 hr gene expression and metabolic rhythms in mouse liver, coupled with a physiological 12 hr unfolded protein response oscillation. The mammalian 12 hr rhythm is cell autonomous, driven by a dedicated 12 hr pacemaker distinct from the circadian clock, and can be entrained in vitro by metabolic and ER stress cues. Mechanistically, we identified XBP1s as a transcriptional regulator of the mammalian 12 hr clock. Downregulation of the 12 hr gene expression strongly correlates with human hepatic steatosis and steatohepatitis, implying its importance in maintaining metabolic homeostasis. The mammalian 12 hr rhythm of gene expression also is conserved in nematodes and crustaceans, indicating an ancient origin of the 12 hr clock. Our work sheds new light on how perturbed biological rhythms contribute to human disease.
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Affiliation(s)
- Bokai Zhu
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Qiang Zhang
- Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA
| | - Yinghong Pan
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77004, USA
| | - Emily M Mace
- Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Brian York
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Athanasios C Antoulas
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA; Max Planck Fellow Group for Data-Driven System Reduction and Identification, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg 39106, Germany
| | - Clifford C Dacso
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Department of Medicine, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA; Department of Electrical and Computer Engineering, Rice University, Houston, TX 77005, USA
| | - Bert W O'Malley
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX 77030, USA; Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX 77030, USA.
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42
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Wang Z, Liu N, Zhou G, Shi T, Wang Z, Gan J, Wang R, Qian H, Bao N, Guo T, Zhao J. Expression of XBP1s in fibroblasts is critical for TiAl 6 V 4 particle-induced RANKL expression and osteolysis. J Orthop Res 2017; 35:752-759. [PMID: 26403762 DOI: 10.1002/jor.23056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 09/21/2015] [Indexed: 02/04/2023]
Abstract
Wear particle-induced osteolysis is a major cause of aseptic loosening, which is one of the most common reasons for total hip arthroplasty (THA) failure. Previous studies have shown that the expression of Receptor activation of nuclear factor (NF)-kB (RANKL) by fibroblasts in periprosthetic membrane played a crucial role in wear particle-induced osteolysis. However, the underlying mechanism of RANKL expression remains largely unknown. In the present study, we investigated the effect of TiAl6 V4 particle (TiPs)-induced XBP1s (spliced form of X-box binding protein 1) on RANKL expression and osteoclastogenesis both in vitro and in vivo. The levels of XBP1s in peri-implant membrane, animal models, and TiPs-stimulated fibroblasts were determined by western blots. To assess the effect of XBP1s on RANKL expression, fibroblasts were treated with both a small interfering RNA (siRNA) and an inhibitor of XBP1 prior to exposure to TiPs. The effect of XBP1s on osteoclasts formation was determined by tartrate-resistant acid phosphatase (TRAP) staining in vitro osteoclastogenesis assay and in animal models. The resorption of bone was assessed by micro-computed tomography (micro-CT) with three-dimensional reconstruction. Our results demonstrated that XBP1s was activated in periprosthetic membrane, mouse calvaria models, and TiPs-stimulated human synovial fibroblasts. Further, inhibition of XBP1s decreased the expression of RANKL and osteoclasts formation in vitro. In mouse calvaria models, both of the osteoclastogenesis and osteolysis were inhibited XBP1s inhibitor. Our results suggested that XBP1s mediated TiPs-induced of RANKL expression in fibroblasts, and down regulating XBP1s may represent a potential therapy for wear particle-induced osteolysis. © 2016 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 35:752-759, 2017.
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Affiliation(s)
- Zhenheng Wang
- Department of Orthopaedics, Jinling Hospital, School of Medicine, Nanjing University, China
| | - Naicheng Liu
- Department of Orthopaedics, Jinling Hospital, School of Medicine, Nanjing University, China
| | - Gang Zhou
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, China
| | - Tongguo Shi
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, China
| | - Zhenzhen Wang
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, China
| | - Jingjing Gan
- State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, China
| | - Rui Wang
- Department of Orthopaedics, Jinling Hospital, School of Medicine, Nanjing University, China
| | - Hongbo Qian
- Department of Orthopaedics, Jinling Hospital, School of Medicine, Nanjing University, China
| | - Nirong Bao
- Department of Orthopaedics, Jinling Hospital, School of Medicine, Nanjing University, China
| | - Ting Guo
- Department of Orthopaedics, Jinling Hospital, School of Medicine, Nanjing University, China
| | - Jianning Zhao
- Department of Orthopaedics, Jinling Hospital, School of Medicine, Nanjing University, China
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Liu J, Ibi D, Taniguchi K, Lee J, Herrema H, Akosman B, Mucka P, Salazar Hernandez MA, Uyar MF, Park SW, Karin M, Ozcan U. Inflammation Improves Glucose Homeostasis through IKKβ- XBP1s Interaction. Cell 2016; 167:1052-1066.e18. [PMID: 27814504 PMCID: PMC5908236 DOI: 10.1016/j.cell.2016.10.015] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Revised: 01/28/2016] [Accepted: 10/07/2016] [Indexed: 02/06/2023]
Abstract
It is widely believed that inflammation associated with obesity has an important role in the development of type 2 diabetes. IκB kinase beta (IKKβ) is a crucial kinase that responds to inflammatory stimuli such as tumor necrosis factor α (TNF-α) by initiating a variety of intracellular signaling cascades and is considered to be a key element in the inflammation-mediated development of insulin resistance. We show here, contrary to expectation, that IKKβ-mediated inflammation is a positive regulator of hepatic glucose homeostasis. IKKβ phosphorylates the spliced form of X-Box Binding Protein 1 (XBP1s) and increases the activity of XBP1s. We have used three experimental approaches to enhance the IKKβ activity in the liver of obese mice and observed increased XBP1s activity, reduced ER stress, and a significant improvement in insulin sensitivity and consequently in glucose homeostasis. Our results reveal a beneficial role of IKKβ-mediated hepatic inflammation in glucose homeostasis.
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Affiliation(s)
- Junli Liu
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA
| | - Dorina Ibi
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA
| | - Koji Taniguchi
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California, San Diego, 9500 Gilman Drive, San Diego, CA 92093, USA; Department of Pathology, School of Medicine, University of California, San Diego, 9500 Gilman Drive, San Diego, CA 92093, USA
| | - Jaemin Lee
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA
| | - Hilde Herrema
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA
| | - Bedia Akosman
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA
| | - Patrick Mucka
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA
| | | | - Muhemmet Fatih Uyar
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA
| | - Sang Won Park
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA
| | - Michael Karin
- Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology, School of Medicine, University of California, San Diego, 9500 Gilman Drive, San Diego, CA 92093, USA; Department of Pathology, School of Medicine, University of California, San Diego, 9500 Gilman Drive, San Diego, CA 92093, USA
| | - Umut Ozcan
- Division of Endocrinology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02130, USA.
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Chen L, Li Q, She T, Li H, Yue Y, Gao S, Yan T, Liu S, Ma J, Wang Y. IRE1α-XBP1 signaling pathway, a potential therapeutic target in multiple myeloma. Leuk Res 2016; 49:7-12. [PMID: 27518808 DOI: 10.1016/j.leukres.2016.07.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 07/15/2016] [Accepted: 07/21/2016] [Indexed: 10/21/2022]
Abstract
Multiple myeloma (MM), which arises from the uncontrolled proliferation of malignant plasma cells, is the second most commonly diagnosed hematologic malignancy in the United States. Despite the development and application of novel drugs and autologous stem cell transplantation (ASCT), MM remains an incurable disease and patients become more prone to MM relapse and drug resistance. It is extremely urgent to find novel targeted therapy for MM. To date, the classic signaling pathways underlying MM have included the RAS/RAF/MEK/ERK pathway, the JAK-STAT3 pathway, the PI3K/Akt pathway and the NF-KB pathway. The IRE1α-XBP1 signaling pathway is currently emerging as an important pathway involved in the development of MM. Moreover, it is closely associated with the effect of MM treatment and its prognosis. All these findings indicate that the IRE1α-XBP1 pathway can be a potential treatment target. Herein, we investigate the relationship between the IRE1α-XBP1 pathway and MM and discuss the functions of IRE1α-XBP1-targeted drugs in the treatment of MM.
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Affiliation(s)
- Lin Chen
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Qian Li
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Tiantian She
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Han Li
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Yuanfang Yue
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Shuang Gao
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Tinghui Yan
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Su Liu
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Jing Ma
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China
| | - Yafei Wang
- Department of Hematology and Blood and Marrow Transplantation, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin Key Laboratory of Cancer Prevention and Therapy, Huan-Hu-Xi Road, Ti-Yuan-Bei, He Xi District, Tianjin 300060, People's Republic of China.
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Wang Z, Huang Z, Gan J, Liu N, Zhou G, Shi T, Wang Z, Wang R, Bao N, Guo T, Chen J, Zhang J, Dong L, Zhao J. The fibroblast expression of RANKL in CoCrMo-particle-induced osteolysis is mediated by ER stress and XBP1s. Acta Biomater 2015; 24:352-60. [PMID: 26112372 DOI: 10.1016/j.actbio.2015.06.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 06/05/2015] [Accepted: 06/17/2015] [Indexed: 11/30/2022]
Abstract
Particle-induced osteolysis is a major cause of aseptic loosening, which is the most common reason for total hip arthroplasty (THA) failure and revision surgery. Although existing studies suggest that synovial fibroblasts present in the interfacial membrane are important targets of wear particles during bone resorption, the interaction mechanisms between the particles and fibroblasts remains elusive. In the present study, we investigated the effect of ER stress induced by CoCrMo particles (CoPs) in fibroblasts, calvarial resorption animal models and aseptic loosening clinical samples and its role in the stimulation of the RANKL expression. Our study further demonstrated that CoPs could induce significant ER stress in fibroblasts. Blocking ER stress with a specific inhibitor dramatically reduced the particle-induced expression of RANKL in vitro and in vivo. Furthermore, in fibroblasts, downregulation of the expression of XBP1s, a signaling molecule of ER stress, significantly reduced the expression of RANKL induced by wear particles. Moreover, inhibition of ER stress or XBP1s both ameliorated the CoPs-induced osteolysis in animal models. Collectively, these results suggested that in particle-induced osteolysis, CoPs could stimulate fibroblasts to secret RANKL through ER stress and the signaling molecule XBP1s. Therefore, downregulating ER stress or the signaling molecule XBP1s of fibroblasts represents a potential therapeutic approach for treating particle-induced peri-implant osteolysis. STATEMENT OF SIGNIFICANCE For the first time, our study demonstrated that ER stress mediated the induction of RANKL expression by CoPs in fibroblasts and promoted particle-induced osteolysis. Furthermore, the upregulation of RANKL by CoPs in fibroblasts was mediated by the ER stress signaling molecule XBP1s. Both blocking ER stress and inhibiting the protein XBP1s by specific inhibitors resulted in downregulation of the expression of RANKL and amelioration of osteolysis induced by the implanted particles. Collectively, these findings suggest a possible mechanism underlying the RANKL expression induced by wear particles in fibroblasts, and downregulating ER stress and the XBP1s expression of fibroblasts represents a potential therapeutic approach for treating aseptic loosening.
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Affiliation(s)
- Zhenheng Wang
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Zhen Huang
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Jingjing Gan
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Naicheng Liu
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Gang Zhou
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Tongguo Shi
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Zhenzhen Wang
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Rui Wang
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Nirong Bao
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Ting Guo
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Jiangning Chen
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China
| | - Junfeng Zhang
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China; Jiangsu Provincial Laboratory for Nano-Technology, Nanjing University, Nanjing 210093, China.
| | - Lei Dong
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China.
| | - Jianning Zhao
- Jinling Hospital, Department of Orthopaedics, School of Medicine and State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, 210093, China.
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Zhang Y, Liu CM, Cao XC, Zang Y, Zhou YB, Li J. Involvement of transcription factor XBP1s in the resistance of HDAC6 inhibitor Tubastatin A to superoxidation via acetylation-mediated proteasomal degradation. Biochem Biophys Res Commun 2014; 450:433-9. [PMID: 24909686 DOI: 10.1016/j.bbrc.2014.05.134] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Accepted: 05/28/2014] [Indexed: 10/25/2022]
Abstract
HDAC6 is a major cytoplasmic deacetylase. XBP1s is a basic-region leucine zipper (bZIP) transcriptional factor. Despite their mutual involvement in the anti-oxidative process, there are no reports about their inter-protein interactions so far. Here we identified a direct link between HDAC6 inhibition and XBP1s transcription activity in anti-oxidative damage. We showed that the specific HDAC6 inhibitor Tubastatin A could up-regulate XBP1s transcriptional activity, thereby increasing anti-oxidative genes expression. Moreover, knock down of XBP1s could significantly abolish the cell growth protection afforded by Tubastatin A. We hypothesize that Tubastatin A acts to increase XBP1s protein levels that are dependent on its HDAC6 deacetylase inhibition via a mechanism involving acetylation-mediated proteasomal degradation, providing novel mechanistic insight into the anti-oxidative effects of HDAC6 inhibition.
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Affiliation(s)
- Yue Zhang
- School of Life Sciences, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China; National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Chang-mei Liu
- School of Life Sciences, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China; National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xian-cao Cao
- School of Life Sciences, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China; National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yi Zang
- National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yu-bo Zhou
- National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Jia Li
- School of Life Sciences, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China; National Center for Drug Screening, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
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