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Liu Y, Xia H, Wang Y, Han S, Liu Y, Zhu S, Wu Y, Luo J, Dai J, Jia Y. Prognosis and immunotherapy in melanoma based on selenoprotein k-related signature. Int Immunopharmacol 2024; 137:112436. [PMID: 38857552 DOI: 10.1016/j.intimp.2024.112436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Revised: 05/26/2024] [Accepted: 06/05/2024] [Indexed: 06/12/2024]
Abstract
Selenium and selenoproteins are closely related to melanoma progression. However, it is unclear how SELENOK affects lipid metabolism, endoplasmic reticulum stress (ERS), immune cell infiltration, survival, and prognosis in melanoma patients. Transcriptome data from melanoma patients was used to investigate SELENOK levels and their effect on prognosis, followed by an investigation of SELENOK's effects on immune cell infiltration. Furthermore, a risk model based on ERS, lipid metabolism, and immune-related genes was constructed, and its utility in melanoma prognosis was evaluated. Finally, the drug sensitivity of the risk model was analyzed to provide a reference for melanoma therapy. The results showed that melanoma with a high SELENOK level had a greater degree of immune cell infiltration and a better prognosis. Additionally, SELENOK was found to regulate ERS, lipid metabolism, and immune cell infiltration in melanoma. The risk model based on SELENOK signature genes successfully predicted the prognosis of melanoma, and the low-risk group exhibited a favorable immunological microenvironment. Furthermore, high-risk patients with melanoma were candidates for chemotherapy with RAS pathway inhibitors, whereas low-risk patients were more susceptible to routinely used chemotherapy medicines. In summary, SELENOK was shown to regulate ERS, lipid metabolism, and immune cell infiltration in melanoma, and SELENOK was positively associated with the prognosis of melanoma. The risk model based on SELENOK signature genes was valuable for melanoma prognosis and therapy.
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Affiliation(s)
- Yang Liu
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering (School of Modern Industry for Health and Medicine)/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
| | - Huan Xia
- Department of Pathology, GuiZhou QianNan People's Hospital, Qiannan Pathology Research Center of Guizhou Province, QianNan 558000, China
| | - Yongmei Wang
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering (School of Modern Industry for Health and Medicine)/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
| | - Shuang Han
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering (School of Modern Industry for Health and Medicine)/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
| | - Yongfen Liu
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering (School of Modern Industry for Health and Medicine)/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
| | - Shengzhang Zhu
- Department of Pathology, GuiZhou QianNan People's Hospital, Qiannan Pathology Research Center of Guizhou Province, QianNan 558000, China
| | - Yongjin Wu
- Department of Clinical Laboratory, GuiZhou QianNan People's Hospital, QianNan 558000, China
| | - Jimin Luo
- Department of Pathology, GuiZhou QianNan People's Hospital, Qiannan Pathology Research Center of Guizhou Province, QianNan 558000, China
| | - Jie Dai
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering (School of Modern Industry for Health and Medicine)/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China.
| | - Yi Jia
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering (School of Modern Industry for Health and Medicine)/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China.
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Lv L, Chai L, Wang J, Wang M, Qin D, Song H, Fu Y, Zhao C, Jia J, Zhao W, Jia M. Selenoprotein K enhances STING oligomerization to facilitate antiviral response. PLoS Pathog 2023; 19:e1011314. [PMID: 37023217 PMCID: PMC10112805 DOI: 10.1371/journal.ppat.1011314] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 04/18/2023] [Accepted: 03/22/2023] [Indexed: 04/08/2023] Open
Abstract
Stimulator-of-interferon gene (STING) is a vital element of the innate immune system against DNA viruses. Optimal activation of STING is crucial for maintaining immune homeostasis and eliminating invading viruses, and the oligomerization of STING is an essential prerequisite for STING activation. However, the mechanism of cGAMP-induced STING oligomerization in ER remains unclear. Selenoproteins are crucial for various physiological processes. Here, we identified that the endoplasmic reticulum (ER)-located transmembrane selenoprotein K (SELENOK) was induced during virus infection and facilitated innate immune responses against herpes simplex virus-1 (HSV-1). Mechanistically, SELENOK interacts with STING in the ER and promotes STING oligomerization, which in turn promotes its translocation from the ER to the Golgi. Consequently, Selenok deficiency suppresses STING-dependent innate responses and facilitates viral replication in vivo. Thus, the control of STING activation by selenium-mediated SELENOK expression will be a priming therapeutic strategy for the treatment of STING-associated diseases.
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Affiliation(s)
- Lin Lv
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Li Chai
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Jie Wang
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Mengge Wang
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Danhui Qin
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Hui Song
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Yue Fu
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Department of Physiology & Pathophysiology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Chunyuan Zhao
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
- Department of Cell Biology, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Jihui Jia
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Wei Zhao
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
| | - Mutian Jia
- Key Laboratory for Experimental Teratology of the Chinese Ministry of Education, and Key Laboratory of Infection and Immunity of Shandong Province, School of Basic Medical Science, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
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Chen CL, Wang HL, Qian F, Liu MH, Guo XX, Lv J, Huang JH, Zhang NZ, Xiang Z. Prominent Effects of Berbamine Hydrochloride on Alzheimer’s Disease Model Mice. Front Pharmacol 2022; 13:939039. [PMID: 35846991 PMCID: PMC9280290 DOI: 10.3389/fphar.2022.939039] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 05/23/2022] [Indexed: 12/30/2022] Open
Abstract
Very few anti-Alzheimer’s disease (AD) drugs are clinically available at present due to the complex mechanism of Alzheimer’s disease. For the purpose of discovering potential anti-AD drugs in bisbenzylisoquinoline alkaloids, the anti-AD function and the mechanism of the function of berbamine hydrochloride (BBMH) were studied. Three kinds of AD model mice, double transgenic APP/PS1 AD mice, Gal-Alu AD mice induced by the intraperitoneal injection of d-galactose combined with the intragastric administration of aluminum trichloride, and Alu AD-like mice induced by stereotactic brain injection of aluminum trichloride, were administered with BBMH for 40 days at a dosage of 280 mg/kg/d. The effects of BBMH on the learning and memory behavior of the AD mice were studied through the Morris water maze experiment, and the influences of BBMH on the pathological features of AD, including the deposition of Aβ, the lesions of pyramidal cells (neurons), and the formation of neurofibrillary tangles, were studied by the immunohistochemical staining, hematoxylin-eosin staining, and silver staining of the brain tissues of the mice. The water maze experiment showed that BBMH could significantly improve the learning and memory abilities of three kinds of treated mice. Immunohistochemical staining showed that BBMH could significantly reduce the deposition of Aβ in the brain tissues of treated mice. Hematoxylin-eosin staining showed that BBMH could significantly alleviate the lesions of pyramidal cells in the hippocampal tissue of the mice. Silver staining showed that BBMH could significantly reduce the formation of neurofibrillary tangles in the hippocampal tissue of the mice. These results indicated that BBMH has significant anti-AD effects and the potential as an anti-AD drug. Western blot analysis of the brain tissue of the mice showed that the expression level of calpain, a Ca2+-dependent proteolytic enzyme, was significantly inhibited and the expression level of SelK, a selenoprotein mainly expressed in immune cells, was significantly increased. It is speculated that the anti-AD effect of BBMH is related to the improvement of the phagocytosis of microglial cells in brain tissues and macrophages migrated into the brain as well as the regulation of calcium homeostasis and calcium-dependent proteases in the brain tissues of the mice.
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Affiliation(s)
- Chang-lan Chen
- School of Light Industry, Liaoning University, Shenyang, China
| | - Hai-li Wang
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Feng Qian
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Mei-hua Liu
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Xiao-xuan Guo
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Jing Lv
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Jia-hui Huang
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Nai-zhi Zhang
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Zheng Xiang
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
- *Correspondence: Zheng Xiang,
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Xia H, Wang Y, Dai J, Zhang X, Zhou J, Zeng Z, Jia Y. Selenoprotein K Is Essential for the Migration and Phagocytosis of Immature Dendritic Cells. Antioxidants (Basel) 2022; 11:antiox11071264. [PMID: 35883755 PMCID: PMC9311522 DOI: 10.3390/antiox11071264] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 06/20/2022] [Accepted: 06/23/2022] [Indexed: 12/25/2022] Open
Abstract
Selenoprotein K (SELENOK) is an endoplasmic reticulum stress (ERS)-regulated protein required for the calcium (Ca2+) flux-mediated migration of T cells and neutrophils, and the migration and phagocytosis of macrophages and microglia. However, the effect of SELENOK on the regulation of the immune function of dendritic cells (DCs), including immature DCs (imDCs) and mature DCs (mDCs), is still unclear. In this study, imDCs prepared from SELENOK knockout mice were used to evaluate the effect of SELENOK on the migration and phagocytosis of imDCs. The results showed that ERS-induced downregulation of imDCs phenotypic markers led to a reduction in Ras homolog gene family member A (RhoA)-dependent migration and enhanced Ca2+/CD205-mediated phagocytosis. SELENOK deficiency-induced upregulation of selenoprotein S (SELENOS) attenuated ERS levels in imDCs. An increase in Ca2+ levels resulted in increased migration and decreased phagocytosis with or without ERS conditions. The migration was RhoA-dependent, and Ca2+ or CD205 was associated with regulating phagocytosis in imDCs. Our study found that SELENOK is required for imDC migration and phagocytosis.
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Affiliation(s)
- Huan Xia
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; (H.X.); (Y.W.); (J.D.); (X.Z.)
- Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
- Department of Pathology, Guizhou Qiannan People’s Hospital, Qiannan 558000, China
| | - Yongmei Wang
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; (H.X.); (Y.W.); (J.D.); (X.Z.)
- Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
| | - Jie Dai
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; (H.X.); (Y.W.); (J.D.); (X.Z.)
- Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
| | - Xin Zhang
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; (H.X.); (Y.W.); (J.D.); (X.Z.)
- Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
| | - Jun Zhou
- Hubei Key Laboratory of Bioinorganic Chemistry & Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China
- Shenzhen Huazhong University of Science and Technology Research Institute, 9 Yuexing Third Road, Shenzhen 518057, China
- Correspondence: (J.Z.); (Z.Z.); (Y.J.)
| | - Zhu Zeng
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; (H.X.); (Y.W.); (J.D.); (X.Z.)
- Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
- Correspondence: (J.Z.); (Z.Z.); (Y.J.)
| | - Yi Jia
- Key Laboratory of Infectious Immune and Antibody Engineering of Guizhou Province, Cellular Immunotherapy Engineering Research Center of Guizhou Province, School of Biology and Engineering/School of Basic Medical Sciences, Guizhou Medical University, Guiyang 550025, China; (H.X.); (Y.W.); (J.D.); (X.Z.)
- Immune Cells and Antibody Engineering Research Center of Guizhou Province, Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang 550025, China
- Correspondence: (J.Z.); (Z.Z.); (Y.J.)
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Ruan Z, Takamatsu-Yukawa K, Wang Y, Ushman ML, Labadorf AT, Ericsson M, Ikezu S, Ikezu T. Functional genome-wide short hairpin RNA library screening identifies key molecules for extracellular vesicle secretion from microglia. Cell Rep 2022; 39:110791. [PMID: 35545052 PMCID: PMC9133589 DOI: 10.1016/j.celrep.2022.110791] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 02/14/2022] [Accepted: 04/15/2022] [Indexed: 12/18/2022] Open
Abstract
Activated microglia release extracellular vesicles (EVs) as modulators of brain homeostasis and innate immunity. However, the molecules critical for regulating EV production from microglia are poorly understood. Here we establish a murine microglial cell model to monitor EV secretion by measuring the fluorescence signal of tdTomato, which is linked to tetraspanin CD63. Stimulation of tdTomato+ cells with ATP induces rapid secretion of EVs and a reduction in cellular tdTomato intensity, reflecting EV secretion. We generate a GFP+ tdTomato+ cell library expressing TurboGFP and barcoded short hairpin RNAs for genome-wide screening using next-generation sequencing. We identify Mcfd2, Sepp1, and Sdc1 as critical regulators of ATP-induced EV secretion from murine microglia. Small interfering RNA (siRNA-based) silencing of each of these genes suppresses lipopolysaccharide- and ATP-induced inflammasome activation, as determined by interleukin-1β release from primary cultured murine microglia. These molecules are critical for microglial EV secretion and are potential therapeutic targets for neuroinflammatory disorders. Ruan et al. report genome-wide shRNA library screening on a tdTomato-CD63+ microglia cell model to identify factors implicated in the process of extracellular vesicle (EV) release. The molecules Sepp1, Mcfd2, and Sdc1 are critical for ATP-induced secretion of EV and EV-associated interleukin-1β from murine microglia.
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Affiliation(s)
- Zhi Ruan
- Department of Neuroscience, Mayo Clinic Florida, 4500 San Pablo Road, Jacksonville, FL 32224, USA; Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, Boston, MA 02118, USA
| | - Kayo Takamatsu-Yukawa
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, Boston, MA 02118, USA
| | - Yuzhi Wang
- Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, Boston, MA 02118, USA
| | - Margaret L Ushman
- Department of Neuroscience, Mayo Clinic Florida, 4500 San Pablo Road, Jacksonville, FL 32224, USA
| | - Adam Thomas Labadorf
- Department of Neurology, Boston University School of Medicine, Boston, MA 02118, USA; Bioinformatics Program, Boston University, Boston, MA 02118, USA
| | - Maria Ericsson
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115, USA
| | - Seiko Ikezu
- Department of Neuroscience, Mayo Clinic Florida, 4500 San Pablo Road, Jacksonville, FL 32224, USA
| | - Tsuneya Ikezu
- Department of Neuroscience, Mayo Clinic Florida, 4500 San Pablo Road, Jacksonville, FL 32224, USA; Department of Pharmacology & Experimental Therapeutics, Boston University School of Medicine, Boston, MA 02118, USA.
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Jia Y, Zhang L, Liu X, Zhang S, Dai J, Huang J, Chen J, Wang Y, Zhou J, Zeng Z. Selenium can regulate the differentiation and immune function of human dendritic cells. Biometals 2021; 34:1365-1379. [PMID: 34599706 DOI: 10.1007/s10534-021-00347-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 09/26/2021] [Indexed: 01/30/2023]
Abstract
Selenium is an essential trace element that can regulate the function of immnue cells via selenoproteins. However, the effects of selenium on human dendritic cell (DCs) remain unclear. Thus, selenoprotein levels in monocytes, immature DCs (imDCs) and mature DCs (mDCs) treated with or without Na2SeO3 were evaluated using RT-PCR, and then the immune function of imDCs and mDCs was detected by flow cytometry, cell counting and the CCK8 assay. In addition, the effects of Se on cytokine and surface marker expression were investigated by RT-PCR. The results revealed different expression levels of selenoprotein in monocytes, imDCs and mDCs, and selenoproeins could be regulated by Se. Moreover, it was indicated that anti-phagocytic activity was improved by 0.1 µM Se, whereas it was suppressed by 0.2 µM Se in imDCs; The migration of imDCs and mDCs was improved by 0.1 µM Se, whereas their migration was inhibited by treatment with 0.05 or 0.2 µM Se; The mixed lymphocyte reaction of mDCs was improved by 0.1 µM Se, and it was inhibited by 0.05 and 0.2 µM Se. In addition, 0.1 µM Se improved the immune function of DCs through the regulation of CD80, CD86, IL12-p35 and IL12-p40. Wheres 0.05 and 0.2 µM Se impaired immune function of DCs by up-regulation of interleukin (IL-10) in imDCs and down-regulation of CD80, CD86, IL12-p35 and IL12-p40 in mDCs. In conclusion, 0.1 µM Se might improve the immune function of human DCs through selenoproteins.
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Affiliation(s)
- Yi Jia
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China.
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China.
| | - Liangliang Zhang
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- Prenatal Diagnosis Center, Guizhou Provincial People's Hospital, Guiyang, 550002, Guizhou, China
| | - Xianmei Liu
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Shichao Zhang
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Jie Dai
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Jiangtao Huang
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Jin Chen
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Yun Wang
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- School of Basic Medical Science, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Jing Zhou
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Zhu Zeng
- School of Biology and Engineering, Guizhou Medical University, Guiyang, 550025, Guizhou, China.
- School of Basic Medical Science, Guizhou Medical University, Guiyang, 550025, Guizhou, China.
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Xia H, Zhang L, Dai J, Liu X, Zhang X, Zeng Z, Jia Y. Effect of Selenium and Peroxynitrite on Immune Function of Immature Dendritic Cells in Humans. Med Sci Monit 2021; 27:e929004. [PMID: 33684094 PMCID: PMC7953518 DOI: 10.12659/msm.929004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Background Selenium and peroxynitrite are known to support the growth and activity of immune cells, including T cells, B cells and macrophages. However, the role of these factors in the immune function of human immature dendritic cells (imDCs) is not clear. Material/Methods Monocytes from a mixture of blood samples were isolated using Ficoll density gradient centrifugation and purified with immunomagnetic beads before being induced into imDCs. Cells then either received no treatment (control group), or treatment with sodium selenite (Na2SeO3, Se), 3-morpholinosydnonimine (SIN1, which decomposes into peroxynitrite), or Se+SIN1. Cell viability, migration, and antiphagocytic abilities, oxidative stress, and protein expression of extracellular signal-regulated kinases (ERK) and MMP2 were assessed using a CCK8 assay, cell counter and flow cytometry, microplate spectrophotometer, and Western blot analysis, respectively. Results Viability of imDCs was unaffected by 0.1 μmol/L of Na2SeO3, although 1 mmol/L of SIN1 decreased it significantly (P<0.05). Chemotactic migration and antiphagocytic abilities were inhibited and enhanced, respectively, by treatment with Na2SeO3 and SIN1 (P<0.05). Activities of superoxide dismutase and glutathione peroxidase were increased by Na2SeO3 and Se+SIN1 (P<0.001). Glutathione content decreased with exposure to Na2SeO3 and SIN1 (P<0.05), but increased after treatment with Se+SIN1 (P<0.05). Levels of reactive oxygen species only increased with SIN1 treatment (P<0.05). Treatment with Na2SeO3, SIN1 and Se+SIN1 increased ERK phosphorylation and decreased MMP2 protein expression (P<0.05). Conclusions Selenium and peroxynitrite can influence immune function in imDCs by regulating levels of reactive oxygen species or glutathione to activate ERK and promote antigen phagocytosis, as well as by decreasing MMP2 expression to inhibit chemotactic migration.
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Affiliation(s)
- Huan Xia
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland).,School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland)
| | - Liangliang Zhang
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland).,School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland)
| | - Jie Dai
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland).,School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland)
| | - Xianmei Liu
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland).,School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland)
| | - Xin Zhang
- School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland).,Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland)
| | - Zhu Zeng
- School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland).,School of Basic Medical Science, Guizhou Medical University, Guiyang, Guizhou, China (mainland)
| | - Yi Jia
- Immune Cells and Antibody Engineering Research Center of Guizhou Province/Key Laboratory of Biology and Medical Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland).,School of Biology and Engineering, Guizhou Medical University, Guiyang, Guizhou, China (mainland)
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8
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Kavolus JJ, Lazarides AL, Moore C, Seyler TM, Wellman SS, Attarian DE, Bolognesi MP, Alman BA. The Calpain Gene is Correlated With Metal-on-Metal Hip Replacement Failures. J Arthroplasty 2021; 36:236-241.e3. [PMID: 32811707 DOI: 10.1016/j.arth.2020.07.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 07/18/2020] [Accepted: 07/22/2020] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Metal-on-metal (MOM) total hip arthroplasty is associated with unacceptable failure rates secondary to metal ion reactions. Efforts to identify which patients will go on to failure have been limited; recently, there has been a suggestion for a potential genetic basis for the increased risk of revision in MOM hip replacements (MOMHRs). The purpose of this study is to determine whether certain immunologic genotypes are predictive of the need for revision in patients with MOM total hip implants. METHODS This is a case-control study of all patients undergoing primary MOMHR between September 2002 and January 2012 with a minimum of 5-year follow-up. Our investigational "case" cohort was comprised of patients who underwent revision for MOMHR for a reason other than infection. A single-nucleotide polymorphism (SNP) array analysis was performed to identify a potential genetic basis for failure. RESULTS Thirty-two patients (15 case and 17 control) were included in our analysis. All patients in the revision group had a chief complain of pain; revision patients were more likely to have a posterior approach (P = .01) and larger head size (P = .04) than nonrevision patients. No patient or implant characteristics were independently associated with revision in a multivariate analysis. Patients with SNP kgp9316441 were identified as having an increased odds of revision for MOM failure (P < .001). CONCLUSION This study identified an SNP, kgp9316441, encoding proteins associated with inflammation and macrophage activation. This SNP was associated with significantly increased odds of revision for MOMHR. Future studies are warranted to validate this gene target both in vitro and in vivo. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Joseph J Kavolus
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC
| | | | - Christina Moore
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC
| | - Thorsten M Seyler
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC
| | - Samuel S Wellman
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC
| | - David E Attarian
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC
| | - Michael P Bolognesi
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC
| | - Benjamin A Alman
- Department of Orthopaedic Surgery, Duke University Medical Center, Durham, NC
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9
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Protein-protein interactions of ER-resident selenoproteins with their physiological partners. Biochimie 2020; 171-172:197-204. [PMID: 32188576 DOI: 10.1016/j.biochi.2020.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Accepted: 03/13/2020] [Indexed: 12/22/2022]
Abstract
ER is a highly specialized complex of branched microtubules enclosed in a membrane and communicating with each other, its functions in the cell are important and very diverse: lipid and phospholipid synthesis, calcium storage, hormone synthesis, protein synthesis and maturation, membrane production, toxin neutralization, etc. The high concentration of calcium ions and the oxidizing properties of the contents of the ER cavities contribute to the proper synthesis and folding of proteins designed for secretion or exposure on the surface of the cell membrane. However, disturbance of redox regulation can lead to the accumulation of improperly folded proteins in the ER, disruption of calcium regulation, which can cause ER-stress. This review is devoted to the role of ER-resident selenoproteins in the processes occurring in this organelle of a cell. The main emphasis is placed on the study of protein-protein interactions of selenoproteins with their physiological partners; this will facilitate understanding of their functional purpose in this organelle. Currently, 7 selenoproteins are known that are localized in the ER, but the functions of most of them are not at all clear, for some, physiological partners have been identified. It is known that selenoproteins are oxidoreductases with antioxidant properties, this is extremely important for the normal functioning of ER. Therefore, this review can be very useful for understanding the full picture of the functions of ER-resident selenoproteins obtained on the basis of recent data.
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10
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Marciel MP, Hoffmann PR. Molecular Mechanisms by Which Selenoprotein K Regulates Immunity and Cancer. Biol Trace Elem Res 2019; 192:60-68. [PMID: 31187393 PMCID: PMC6801056 DOI: 10.1007/s12011-019-01774-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 06/05/2019] [Indexed: 02/07/2023]
Abstract
Many of the 25 members of the selenoprotein family function as enzymes that utilize their selenocysteine (Sec) residues to catalyze redox-based reactions. However, some selenoproteins likely do not exert enzymatic activity by themselves and selenoprotein K (SELENOK) is one such selenoprotein family member that uses its Sec residue in an alternative manner. SELENOK is an endoplasmic reticulum (ER) transmembrane protein that has been shown to be important for ER stress and for calcium-dependent signaling. Molecular mechanisms for the latter have recently been elucidated using knockout mice and genetically manipulated cell lines. These studies have shown that SELENOK interacts with an enzyme in the ER membrane, DHHC6 (letters represent the amino acids aspartic acid, histidine, histidine, and cysteine in the catalytic domain), and the SELENOK/DHHC6 complex catalyzes the transfer of acyl groups such as palmitate to cysteine residues in target proteins, i.e., palmitoylation. One protein palmitoylated by SELENOK/DHHC6 is the calcium channel protein, the inositol 1,4,5-trisphosphate receptor (IP3R), which is acylated as a means for stabilizing the tetrameric calcium channel in the ER membrane. Factors that lower SELENOK levels or function impair IP3R-driven calcium flux. This role for SELENOK is important for the activation and proliferation of immune cells, and recently, a critical role for SELENOK in promoting calcium flux for the progression of melanoma has been demonstrated. This review provides a summary of these findings and their implications in terms of designing new therapeutic interventions that target SELENOK for treating cancers like melanoma.
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Affiliation(s)
- Michael P Marciel
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - Peter R Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA.
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11
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Cai Z, Zhang Y, Zhang Y, Miao X, Li S, Yang H, Ling Q, Hoffmann PR, Huang Z. Use of a Mouse Model and Human Umbilical Vein Endothelial Cells to Investigate the Effect of Arsenic Exposure on Vascular Endothelial Function and the Associated Role of Calpains. ENVIRONMENTAL HEALTH PERSPECTIVES 2019; 127:77003. [PMID: 31274337 PMCID: PMC6792366 DOI: 10.1289/ehp4538] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
BACKGROUND Arsenic (As) is a well-known environmental contaminant. Chronic exposure to As is known to increase the risk of cardiovascular diseases, including atherosclerosis, hypertension, diabetes, and stroke. However, the detailed mechanisms by which As causes vascular dysfunction involving endothelial integrity and permeability is unclear. OBJECTIVES Our goal was to investigate how exposure to As leads to endothelial dysfunction. METHODS Arsenic trioxide (ATO) was used to investigate the effects and mechanisms by which exposure to As leads to endothelial dysfunction using a mouse model and cultured endothelial cell monolayers. RESULTS Compared with the controls, mice exposed chronically to As (10 ppb in drinking water supplied by ATO) exhibited greater vascular permeability to Evans blue dye and fluorescein isothiocyanate-labeled bovine serum albumin (FITC-BSA). In addition, endothelial monolayers treated with ATO ([Formula: see text] As) exhibited greater intracellular gaps and permeability to low-density lipoprotein or transmigrating THP-1 cells. Furthermore, activity and protein levels of calpain-1 (CAPN-1) were significantly higher in aortas and human umbilical vein endothelial cells (HUVECs) treated with ATO. These results were consistent with effects of ATO treatment and included a rapid increase of intracellular calcium ([Formula: see text]) and higher levels of CAPN-1 in the plasma membrane. Endothelial cell dysfunction and the proteolytic disorganization of vascular endothelial cadherin (VE-cadherin) in HUVECs in response to ATO were partially mitigated by treatment with a CAPN-1 inhibitor (ALLM) but not a CAPN-2 inhibitor (Z-LLY-FMK). CONCLUSIONS This study found that in mice and HUVEC models, exposure to ATO led to CAPN-1 activation by increasing [Formula: see text] and CAPN-1 translocation to the plasma membrane. The study also suggested that inhibitor treatment may have a role in preventing the vascular endothelial dysfunction associated with As exposure. The findings presented herein suggest that As-induced endothelial dysfunction involves the hyperactivation of the CAPN proteolytic system. https://doi.org/10.1289/EHP4538.
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Affiliation(s)
- Zhihui Cai
- Department of Biotechnology, Jinan University, Guangzhou, Guangdong Province, China
| | - Yanqing Zhang
- Department of Biotechnology, Jinan University, Guangzhou, Guangdong Province, China
| | - Yutian Zhang
- Department of Biotechnology, Jinan University, Guangzhou, Guangdong Province, China
| | - Xiaofeng Miao
- Department of Biotechnology, Jinan University, Guangzhou, Guangdong Province, China
| | - Shu Li
- Department of Biotechnology, Jinan University, Guangzhou, Guangdong Province, China
| | - Hui Yang
- Department of Biotechnology, Jinan University, Guangzhou, Guangdong Province, China
| | - Qinjie Ling
- Department of Biotechnology, Jinan University, Guangzhou, Guangdong Province, China
| | - Peter R. Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA
| | - Zhi Huang
- Department of Biotechnology, Jinan University, Guangzhou, Guangdong Province, China
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12
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Meng XL, Chen CL, Liu YY, Su SJ, Gou JM, Huan FN, Wang D, Liu HS, Ben SB, Lu J. Selenoprotein SELENOK Enhances the Migration and Phagocytosis of Microglial Cells by Increasing the Cytosolic Free Ca 2+ Level Resulted from the Up-Regulation of IP 3R. Neuroscience 2019; 406:38-49. [PMID: 30849448 DOI: 10.1016/j.neuroscience.2019.02.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 02/23/2019] [Accepted: 02/25/2019] [Indexed: 01/14/2023]
Abstract
Enhancing the migration and phagocytosis of microglial cells is of great significance for the reducing of the risk of the neurodegenerative diseases, such as Alzheimer's disease (AD) and Parkinson's disease (PD). The effect of mouse selenoprotein K (mSELENOK) on the migration and phagocytosis of BV2 microglial cells and its mechanism were studied. The results showed that the over-expression of mSELENOK can increase the migratory and phagocytic abilities of the microglial cells, while the knockdown of mSELENOK can decrease the migratory and phagocytic abilities of the cells. The cytosolic free Ca2+ level and inositol trisphosphate receptor (IP3R) mRNA transcript and protein expression were also increased significantly as the consequence of the over-expression of mSELENOK in the microglial cells. On the contrary, the level of cytosolic free Ca2+ and the mRNA transcript and protein expression of IP3R in mSELENOK knockdown cells were decreased significantly. 2-aminoethoxydiphenyl borate (2-APB), an antagonist of IP3R, could prevent the increased migration, phagocytosis, and cytosolic free Ca2+ level of mSELENOK over-expressed microglial cells, and knockdown of IP3R3 could reduce the increased cytosolic Ca2+ level in mSELENOK over-expressed microglial cells. Further studies revealed that selenium supplement (Na2SeO3) can increase the expression of mSELENOK in microglial cells significantly. In summary, these data suggest that mSELENOK can increase cytosolic free Ca2+ level of microglial cells by up-regulating the expression of IP3R, thus enhancing the migration and phagocytosis of microglial cells. Our results indicated that mSELENOK is an important selenoprotein, which plays a role in trace element selenium's functions and can enhance the migration and phagocytosis of microglial cells.
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Affiliation(s)
- Xue-Lian Meng
- School of Pharmaceutical Science, Liaoning University, Shenyang, China; Research Center for Natural product pharmacy of Liaoning Province, Shenyang, China
| | - Chang-Lan Chen
- School of Pharmaceutical Science, Liaoning University, Shenyang, China; Research Center for Natural product pharmacy of Liaoning Province, Shenyang, China.
| | - Ying-Ying Liu
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Shu-Jie Su
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Jiang-Min Gou
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Feng-Ning Huan
- School of Pharmaceutical Science, Liaoning University, Shenyang, China
| | - Dan Wang
- School of Pharmaceutical Science, Liaoning University, Shenyang, China; Research Center for Natural product pharmacy of Liaoning Province, Shenyang, China
| | - Hong-Sheng Liu
- Research Center for Computer Simulating and Information Processing of Bio-macromolecules of Liaoning Province, Shenyang, China
| | - Song-Bin Ben
- School of Life Science, Liaoning University, Shenyang, China
| | - Jing Lu
- School of Pharmaceutical Science, Liaoning University, Shenyang, China; Research Center for Natural product pharmacy of Liaoning Province, Shenyang, China.
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13
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Falk M, Bernhoft A, Framstad T, Salbu B, Wisløff H, Kortner TM, Kristoffersen AB, Oropeza-Moe M. Effects of dietary sodium selenite and organic selenium sources on immune and inflammatory responses and selenium deposition in growing pigs. J Trace Elem Med Biol 2018; 50:527-536. [PMID: 29673733 DOI: 10.1016/j.jtemb.2018.03.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 02/21/2018] [Accepted: 03/05/2018] [Indexed: 01/31/2023]
Abstract
The study was conducted to compare effects of different dietary Se sources (sodium selenite [NaSe], Se-enriched yeast [Se yeast] or L-selenomethionine [SeMet]) and one Se-deficient control diet on the expression of selected genes, hematological and clinical biochemical parameters, and muscle morphology in two parallel trials with finisher pigs. Se concentrations in blood plasma and tissues were also monitored. From the pigs in one of the parallel groups, muscle samples obtained from Musculus longissimus dorsi (LD) before and during the trial were examined. The pigs in the other parallel group were challenged once with lipopolysaccharide (LPS) intravenously. Transcriptional analyses of LD showed that selenogenes SelenoW and H were higher expressed in pigs fed Se-supplemented diets compared with control. Furthermore, the expression of interferon gamma and cyclooxygenase 2 was lower in the Se-supplemented pigs versus control. In whole blood samples prior to LPS, SelenoN, SelenoS and thioredoxin reductase 1 were higher expressed in pigs fed NaSe supplemented feed compared with the other groups, possibly indicating a higher level of oxidative stress. After LPS exposure glutathione peroxidase 1 and SelenoN were more reduced in pigs fed NaSe compared with pigs fed organic Se. Products of most above-mentioned genes are intertwined with the oxidant-antioxidant system. No significant effects of Se-source were found on hematologic parameters or microscopic anatomy. The Se-concentrations in various skeletal muscles and heart muscle were significantly different between the groups, with highest concentrations in pigs fed SeMet, followed by those fed Se yeast, NaSe, and control diet. Consistent with previous reports our results indicate that dietary Se at adequate levels can support the body's antioxidant system. Our results indicate that muscle fibers of pigs fed organic Se are less vulnerable to oxidative stress compared with the other groups.
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Affiliation(s)
- Michaela Falk
- Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences (NMBU), Kyrkjevegen 332/334, 4325, Sandnes, Norway.
| | - Aksel Bernhoft
- Norwegian Veterinary Institute, P.O. Box 750, Sentrum, NO-0106, Oslo, Norway.
| | - Tore Framstad
- Faculty of Veterinary Medicine, Department of Production Animal Clinical Sciences, Campus Adamstuen, NMBU, P.O. Box 8146 Dep, NO-0033, Oslo, Norway.
| | - Brit Salbu
- Department of Environmental Sciences/CERAD CoE, Campus Ås, NMBU, P.O. Box 5003, NO-1432 Ås, Norway.
| | - Helene Wisløff
- Norwegian Veterinary Institute, P.O. Box 750, Sentrum, NO-0106, Oslo, Norway.
| | - Trond M Kortner
- Department of Basic Science and Aquatic Medicine, NMBU, P.O. Box 8146 Dep, NO-0033, Oslo, Norway.
| | | | - Marianne Oropeza-Moe
- Department of Production Animal Clinical Sciences, Faculty of Veterinary Medicine, Norwegian University of Life Sciences (NMBU), Kyrkjevegen 332/334, 4325, Sandnes, Norway.
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14
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Yuan W, Chen J, Huang H, Cai Z, Ling Q, Huang F, Huang Z. Low-Dose Arsenic Trioxide Modulates the Differentiation of Mouse Embryonic Stem Cells. Chem Res Toxicol 2018; 31:472-481. [PMID: 29767511 DOI: 10.1021/acs.chemrestox.8b00027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Arsenic (As) is a well-known environmental pollutant, while arsenic trioxide (ATO) has been proven to be an effective treatment for acute promyelocytic leukemia, however, the mechanism underlying its dual effects is not fully understood. Embryonic stem cells (ESCs) exhibit properties of stemness and serve as a popular model to investigate epigenetic modifiers including environmental pollutants. Herein, the effects of low-dose ATO on differentiation were evaluated in vitro using a mouse ESCs (mESCs) cell line, CGR8. Cells treated with 0.2-0.5 μM ATO for 3-4 days had slight inhibition of proliferation with elevation of apoptosis, but obvious alterations of differentiation by morphological checking and alkaline phosphatase (AP) staining. Moreover, ATO exposure significantly decreased the mRNA expression of the stemness maintenance genes including Oct4, Nanog, and Rex-1 ( P < 0.01), whereas obviously increased some tissue-specific differentiation marker genes such as Gata4, Gata-6, AFP, and IHH. These alterations were consistent with the differentiation phenotype induced by retinoic acid (RA) and the expression patterns of distinct pluripotency markers such as SSEA-1 and Oct4. Furthermore, low-dose ATO led to a quantitative increase in Caspase 3 (CASP3) activation and subsequent cleavage of Nanog around 27 kDa, which corresponded with the mouse Nanog cleaved by CASP3 in a tube cleavage assay. Taken together, we suggest that low-dose ATO exposure will induce differentiation, other than apoptosis, of ESCs, such effects might be tuned partially by ATO-induced CASP3 activation and Nanog cleavage coupling with other differentiation related genes involved. The present findings provide a preliminary action mechanism of arsenic on the cell fate determination.
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Affiliation(s)
- Wenlin Yuan
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Jun Chen
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Hongren Huang
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Zhihui Cai
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Qinjie Ling
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
| | - Feng Huang
- Department of Rehabilitation Medicine, School of Medical Engineering , Foshan University , Foshan 528000 , Guangdong Province , China
| | - Zhi Huang
- Department of Biotechnology, School of Life Science and Technology , Jinan University , Guangzhou 510632 , Guangdong Province , China
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15
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Marciel MP, Khadka VS, Deng Y, Kilicaslan P, Pham A, Bertino P, Lee K, Chen S, Glibetic N, Hoffmann FW, Matter ML, Hoffmann PR. Selenoprotein K deficiency inhibits melanoma by reducing calcium flux required for tumor growth and metastasis. Oncotarget 2018; 9:13407-13422. [PMID: 29568366 PMCID: PMC5862587 DOI: 10.18632/oncotarget.24388] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Accepted: 01/23/2018] [Indexed: 11/30/2022] Open
Abstract
Interest has emerged in the therapeutic potential of inhibiting store operated calcium (Ca2+) entry (SOCE) for melanoma and other cancers because malignant cells exhibit a strong dependence on Ca2+ flux for disease progression. We investigated the effects of deleting Selenoprotein K (SELENOK) in melanoma since previous work in immune cells showed SELENOK was required for efficient Ca2+ flux through the endoplasmic reticulum Ca2+ channel protein, inositol 1,4,5-trisphosphate receptor (IP3R), which is due to the role SELENOK plays in palmitoylating and stabilizing the expression of IP3R. CRISPR/Cas9 was used to generate SELENOK-deficiency in human melanoma cells and this led to reduced Ca2+ flux and impaired IP3R function, which inhibited cell proliferation, invasion, and migration. Ca2+-dependent signaling through calcineurin was inhibited with SELENOK-deficiency, and gene array analyses together with evaluation of transcript and protein levels showed altered transcriptional programs that ultimately disrupted stemness and pro-growth properties. In vivo investigations were conducted using the Grm1-Tg transgenic mouse strain that develops spontaneous metastatic melanoma, which was crossed with SELENOK−/− mice to generate the following littermates: Grm1-Tg/SELENOK−/−, Grm1-Tg/SELENOK−/+, Grm1-Tg/SELENOK+/+. SELENOK-deficiency in Grm1-Tg/SELENOK−/− male and female mice inhibited primary tumor growth on tails and ears and reduced metastasis to draining lymph nodes down to levels equivalent to non-tumor control mice. Cancer stem cell pools were also decreased in Grm1-Tg/SELENOK−/− mice compared to littermates. These results suggest that melanoma requires SELENOK expression for IP3R dependent maintenance of stemness, tumor growth and metastasic potential, thus revealing a new potential therapeutic target for treating melanoma and possibly other cancers.
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Affiliation(s)
- Michael P Marciel
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, U.S.A
| | - Vedbar S Khadka
- Bioinformatics Core in the Department of Complementary and Integrative Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, U.S.A
| | - Youping Deng
- Bioinformatics Core in the Department of Complementary and Integrative Medicine, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, U.S.A
| | - Pascal Kilicaslan
- Biotechnology Department, University of Applied Sciences Mannheim, Mannheim, Germany
| | - Andrew Pham
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, U.S.A
| | - Pietro Bertino
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, U.S.A
| | - Katie Lee
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, U.S.A
| | - Suzie Chen
- Ernest Mario School of Pharmacy, Rutgers University, Piscataway, New Jersey, U.S.A
| | | | - FuKun W Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, U.S.A
| | | | - Peter R Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, U.S.A
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16
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Marciel MP, Rose AH, Martinez V, Horio DT, Hashimoto AS, Hoffmann FW, Bertino P, Hoffmann PR. Calpain-2 inhibitor treatment preferentially reduces tumor progression for human colon cancer cells expressing highest levels of this enzyme. Cancer Med 2017; 7:175-183. [PMID: 29210197 PMCID: PMC5773958 DOI: 10.1002/cam4.1260] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 10/05/2017] [Accepted: 10/15/2017] [Indexed: 12/18/2022] Open
Abstract
Calpain-2 levels are higher in colorectal tumors resistant to chemotherapy and previous work showed calpain-2 inhibitor therapy reduced inflammation-driven colorectal cancer, but direct effects of the inhibitor on colon cancer cells themselves were not demonstrated. In the present study, five human colon cancer cell lines were directly treated with a calpain-2 inhibitor and results showed increased cell death in 4 of 5 cell lines and decreased anchorage-independent growth for all cell five lines. When tested for levels of calpain-2, three cell lines exhibited increasing levels of this enzyme: HCT15 (low), HCC2998 (medium), and HCT116 (significantly higher). This was consistent with gel shift assays showing that calpain-2 inhibitor reduced of NF-κB nuclear translocation most effectively in HCT116 cells. Ability of calpain-2 inhibitor to impede tumor progression in vivo was evaluated using intrarectal transplant of luciferase-expressing cells for these three cell lines. Results showed that calpain-2 inhibitor therapy reduced tumor growth and increased survival only in mice injected with HCT116 cells. These data suggest calpain-2 inhibitor treatment may be most effective on colorectal tumors expressing highest levels of calpain-2.
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Affiliation(s)
- Michael P Marciel
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Aaron H Rose
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Verena Martinez
- Biotechnology Department, University of Applied Sciences Mannheim, Mannheim, Germany
| | - David T Horio
- Department of Pathology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Ann S Hashimoto
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - FuKun W Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Pietro Bertino
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Peter R Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
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17
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Muniappan L, Javidan A, Jiang W, Mohammadmoradi S, Moorleghen JJ, Katz WS, Balakrishnan A, Howatt DA, Subramanian V. Calpain Inhibition Attenuates Adipose Tissue Inflammation and Fibrosis in Diet-induced Obese Mice. Sci Rep 2017; 7:14398. [PMID: 29089532 PMCID: PMC5663911 DOI: 10.1038/s41598-017-14719-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 10/17/2017] [Indexed: 11/09/2022] Open
Abstract
Adipose tissue macrophages have been proposed as a link between obesity and insulin resistance. However, the mechanisms underlying these processes are not completely defined. Calpains are calcium-dependent neutral cysteine proteases that modulate cellular function and have been implicated in various inflammatory diseases. To define whether activated calpains influence diet-induced obesity and adipose tissue macrophage accumulation, mice that were either wild type (WT) or overexpressing calpastatin (CAST Tg), the endogenous inhibitor of calpains were fed with high (60% kcal) fat diet for 16 weeks. CAST overexpression did not influence high fat diet-induced body weight and fat mass gain throughout the study. Calpain inhibition showed a transient improvement in glucose tolerance at 5 weeks of HFD whereas it lost this effect on glucose and insulin tolerance at 16 weeks HFD in obese mice. However, CAST overexpression significantly reduced adipocyte apoptosis, adipose tissue collagen and macrophage accumulation as detected by TUNEL, Picro Sirius and F4/80 immunostaining, respectively. CAST overexpression significantly attenuated obesity-induced inflammatory responses in adipose tissue. Furthermore, calpain inhibition suppressed macrophage migration to adipose tissue in vitro. The present study demonstrates a pivotal role for calpains in mediating HFD-induced adipose tissue remodeling by influencing multiple functions including apoptosis, fibrosis and inflammation.
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Affiliation(s)
- Latha Muniappan
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | - Aida Javidan
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | - Weihua Jiang
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | | | | | - Wendy S Katz
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | - Anju Balakrishnan
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | - Deborah A Howatt
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA
| | - Venkateswaran Subramanian
- Saha Cardiovascular Research Center, University of Kentucky, Lexington, KY, USA.
- Department of Physiology, University of Kentucky, Lexington, KY, USA.
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18
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Kumar V, Ahmad A. Targeting calpains: A novel immunomodulatory approach for microbial infections. Eur J Pharmacol 2017; 814:28-44. [PMID: 28789934 DOI: 10.1016/j.ejphar.2017.08.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 08/01/2017] [Accepted: 08/03/2017] [Indexed: 02/09/2023]
Abstract
Calpains are a family of Ca2+ dependent cytosolic non-lysosomal proteases with well conserved cysteine-rich domains for enzymatic activity. Due to their functional dependency on Ca2+ concentrations, they are involved in various cellular processes that are regulated by intracellular ca2+ concentration (i.e. embryo development, cell development and migration, maintenance of cellular architecture and structure etc.). Calpains are widely studied proteases in mammalian (i.e. mouse and human) physiology and pathophysiology due to their ubiquitous presence. For example, these proteases have been found to be involved in various inflammatory disorders such as neurodegeneration, cancer, brain and myocardial ischemia and infarction, cataract and muscular dystrophies etc. Besides their role in these sterile inflammatory conditions, calpains have also been shown to regulate a wide range of infectious diseases (i.e. sepsis, tuberculosis, gonorrhoea and bacillary dysentery etc.). One of these regulatory mechanisms mediated by calpains (i.e. calpain 1 and 2) during microbial infections involves the regulation of innate immune response, inflammation and cell death. Thus, the major emphasis of this review is to highlight the importance of calpains in the pathogenesis of various microbial (i.e. bacterial, fungal and viral) diseases and the use of calpain modulators as potential immunomodulators in microbial infections.
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Affiliation(s)
- Vijay Kumar
- Department of Paediatrics and Child Health, Children's Health Queensland Clinical Unit, School of Medicine, University of Queensland, Brisbane, Queensland, Australia.
| | - Ali Ahmad
- Laboratory of innate immunity, CHU Ste-Justine Research Center/Department of Microbiology, Infectious Diseases and Immunology, University of Montreal, 3175 Cote Ste Catherine, Montreal, Quebec, Canada H3T 1C5.
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19
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Liu B, Zhou Y, Lu D, Liu Y, Zhang SQ, Xu Y, Li W, Gu X. Comparison of the protein expression of calpain-1, calpain-2, calpastatin and calmodulin between gastric cancer and normal gastric mucosa. Oncol Lett 2017; 14:3705-3710. [PMID: 28927135 DOI: 10.3892/ol.2017.6617] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 04/13/2017] [Indexed: 11/05/2022] Open
Abstract
The understanding of molecular mechanisms that are involved in the development and the progression of gastric cancer (GC) are of importance for the diagnosis and treatment. The calpain system, which contains the calpains and the endogenous inhibitor, has been suggested as an important factor in the tumorigenesis and migration of colorectal adenocarcinoma, breast and ovarian cancer, and as a prognostic marker for GC. However, the expression level of calpain system proteins in GC and normal-appearing peritumoral gastric mucosa remain unknown. The present study investigated the expression of calpain-1 (CAPN1), calpain-2 (CAPN2), calpastatin and calmodulin (CaM) in GC and uninvolved gastric mucosa tissues with immunohistochemistry. Results demonstrated that CAPN2 protein level increased in GCs compared with normal tissues, while calpastatin and CaM protein level decreased. No evident alterations were observed for CAPN1. Although the protein expression of all these four proteins was not in association with the clinical variables of GC in the present study, higher calpain enzyme activity could be a negative prognostic marker, since calpains are responsible for the generation of active forms of certain proteins that facilitate the progression of cancer. The ratio of (CAPN1 × CAPN2)/(calpastatin × CaM) may serve as a potential index for diagnosis of GC.
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Affiliation(s)
- Bide Liu
- College of Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Yu Zhou
- College of Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Dan Lu
- College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China.,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu 225001, P.R. China
| | - Yong Liu
- School of Life Science and Medicine, Dalian University of Technology, Panjin, Liaoning 124221, P.R. China
| | - Si-Quan Zhang
- College of Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Yan Xu
- College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China
| | - Wei Li
- College of Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China.,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu 225001, P.R. China
| | - Xiao Gu
- College of Clinical Medicine, Yangzhou University, Yangzhou, Jiangsu 225001, P.R. China.,Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases, Yangzhou, Jiangsu 225001, P.R. China
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20
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Sun LH, Pi DA, Zhao L, Wang XY, Zhu LY, Qi DS, Liu YL. Response of Selenium and Selenogenome in Immune Tissues to LPS-Induced Inflammatory Reactions in Pigs. Biol Trace Elem Res 2017; 177:90-96. [PMID: 27726062 DOI: 10.1007/s12011-016-0863-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Accepted: 10/04/2016] [Indexed: 12/20/2022]
Abstract
Circulating concentration of the essential trace element selenium (Se) was significantly lower in inflammatory disorders. Although Se plays physiological roles mainly through the function of 25 selenoproteins, the response of the selenogenome in immune tissues during inflammatory reactions remains unclear. The objective of this study was to determine the Se retention and selenogenome expression in immune tissues during the lipopolysaccharide (LPS)-induced inflammatory response in porcine. A total of 12 male pigs were randomly divided into two groups and injected with LPS or saline. After 4 h postinjection, blood samples were collected and pigs were euthanized. Pigs challenged with LPS had 36.8 and 16.6 % lower (P < 0.05) Se concentrations in the serum and spleen, respectively, than those injected with saline. Moreover, the activities of GPX decreased (P < 0.05) by 23.4, 26.6, and 30.4 % in the serum, thymus, and lymph node, respectively, in the pigs injected with LPS. Furthermore, the LPS challenge altered (P < 0.05) the mRNA expression of 14, 16, 10, and 6 selenoprotein genes in the liver, spleen, thymus, and lymph node, respectively. Along with 10 previously reported selenoprotein genes, the response of Txnrd2, Txnrd3, Sep15, Selh, Seli, Seln, Selo, Selt, Selx, and Sephs2 to inflammatory reaction in immune tissues were newly illustrated in this study. In conclusion, the LPS-induced inflammatory response impaired Se metabolism and was associated with dysregulation of the selenogenome expression in immune tissues.
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Affiliation(s)
- Lv-Hui Sun
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Ding-An Pi
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Ling Zhao
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Xiu-Ying Wang
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China
| | - Luo-Yi Zhu
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - De-Sheng Qi
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, Hubei, 430070, China
| | - Yu-Lan Liu
- Hubei Key Laboratory of Animal Nutrition and Feed Science, Wuhan Polytechnic University, Wuhan, China.
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21
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Zhu C, Zhang S, Song C, Zhang Y, Ling Q, Hoffmann PR, Li J, Chen T, Zheng W, Huang Z. Selenium nanoparticles decorated with Ulva lactuca polysaccharide potentially attenuate colitis by inhibiting NF-κB mediated hyper inflammation. J Nanobiotechnology 2017; 15:20. [PMID: 28270147 PMCID: PMC5341357 DOI: 10.1186/s12951-017-0252-y] [Citation(s) in RCA: 123] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 02/22/2017] [Indexed: 12/20/2022] Open
Abstract
Background Selenium (Se) is an essential micronutrient trace element and an established nutritional antioxidant. Low Se status exacerbates inflammatory bowel diseases progression, which involves hyper inflammation in the digestive tract. Se nanoparticles (SeNPs) exhibit anti-inflammatory activity accompanied by low toxicity, especially when decorated with natural biological compounds. Herein, we explored the beneficial effects of SeNPs decorated with Ulva lactuca polysaccharide (ULP) in mice subjected to the acute colitis model. Results We constructed SeNPs coated with ULP (ULP-SeNPs) in average diameter ~130 nm and demonstrated their stability and homogeneity. Supplementation with ULP-SeNPs (0.8 ppm Se) resulted in a significant protective effect on DSS-induced acute colitis in mice including mitigation of body weight loss, and colonic inflammatory damage. ULP-SeNPs ameliorated macrophage infiltration as evidenced by decreased CD68 levels in colon tissue sections. The anti-inflammatory effects of ULP-SeNPs were found to involve modulation of cytokines including IL-6 and TNF-α. Mechanistically, ULP-SeNPs inhibited the activation of macrophages by suppressing the nuclear translocation of NF-κB, which drives the transcription of these pro-inflammatory cytokines. Conclusions ULP-SeNPs supplementation may offer therapeutic potential for reducing the symptoms of acute colitis through its anti-inflammatory actions. Electronic supplementary material The online version of this article (doi:10.1186/s12951-017-0252-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Chenghui Zhu
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China.,College of Pharmacy, Jinan University, Guangzhou, 510632, Guangdong Province, China
| | - Shuimei Zhang
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China
| | - Chengwei Song
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China
| | - Yibo Zhang
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China
| | - Qinjie Ling
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China
| | - Peter R Hoffmann
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China.,Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - Jun Li
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China
| | - Tianfeng Chen
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China.,College of Chemistry and Material Science, Jinan University, Guangzhou, 510632, Guangdong Province, China
| | - Wenjie Zheng
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China. .,College of Chemistry and Material Science, Jinan University, Guangzhou, 510632, Guangdong Province, China.
| | - Zhi Huang
- School of Life Science and Technology, Jinan University, Guangzhou, 510632, Guangdong Province, China.
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22
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Wang C, Li R, Huang Y, Wang M, Yang F, Huang D, Wu C, Li Y, Tang Y, Zhang R, Cheng J. Selenoprotein K modulate intracellular free Ca 2+ by regulating expression of calcium homoeostasis endoplasmic reticulum protein. Biochem Biophys Res Commun 2017; 484:734-739. [DOI: 10.1016/j.bbrc.2017.01.117] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Accepted: 01/22/2017] [Indexed: 01/24/2023]
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23
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Meng XL, Zhang HL, Feng LL, Chen ML, Liu YY, Yu X, Huan FN, Lu J, Wang D, Liu HS, Chen CL. Selenoprotein SelK increases the secretion of insulin from MIN6 β cells. RSC Adv 2017. [DOI: 10.1039/c7ra05379g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The expression of selenoprotein SelK triggers the secretion of insulin from MIN6 β cells by increasing the cytosolic free Ca2+ level, resulting from the up-regulated IP3R3 expression.
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Affiliation(s)
- Xue-Lian Meng
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Hui-Ling Zhang
- School of Life Science
- Liaoning University
- Shenyang 110036
- China
| | - Lin-Lin Feng
- School of Life Science
- Liaoning University
- Shenyang 110036
- China
| | - Man-Ling Chen
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Ying-Ying Liu
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Xia Yu
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Feng-Ning Huan
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Jing Lu
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
| | - Dan Wang
- Research Center for Natural Product Pharmacy of Liaoning Province
- Shenyang 110036
- China
| | - Hong-Sheng Liu
- Research Center for Computer Simulating and Information Processing of Bio-macromolecules of Liaoning Province
- Shenyang 110036
- China
| | - Chang-Lan Chen
- School of Pharmaceutical Science
- Liaoning University
- Shenyang 110036
- China
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24
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Ji J, Su L, Liu Z. Critical role of calpain in inflammation. Biomed Rep 2016; 5:647-652. [PMID: 28101338 DOI: 10.3892/br.2016.785] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Accepted: 09/14/2016] [Indexed: 02/07/2023] Open
Abstract
Calpains are a family of cysteine proteases, implicated in a wide range of cellular calcium-regulated functions. Evidence from previous studies using an inhibitor of calpain indicates that calpain activation is involved in the process of numerous inflammation-associated diseases. As a result of in-depth studies, calpains have been proposed to influence the process of inflammation via a variety of mechanisms. The aim of the present study is to provide an overview of recent reports regarding the role of calpain in the process of inflammation, including regulation of immune cell migration, modulation of the activation of inflammatory mediators, degradation of certain associated proteins and induction of cell apoptosis. Understanding these mechanisms may contribute to the investigation of novel therapeutic targets for inflammation-associated diseases.
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Affiliation(s)
- Jingjing Ji
- Department of Critical Care Medicine, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China; Graduate School, Guangzhou Medical University, Guangzhou, Guangdong 510010, P.R. China
| | - Lei Su
- Department of Critical Care Medicine, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China; Key Laboratory of Hot Zone Trauma Care and Tissue Repair of PLA, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China
| | - Zhifeng Liu
- Department of Critical Care Medicine, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China; Key Laboratory of Hot Zone Trauma Care and Tissue Repair of PLA, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China
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25
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Norton RL, Fredericks GJ, Huang Z, Fay JD, Hoffmann FW, Hoffmann PR. Selenoprotein K regulation of palmitoylation and calpain cleavage of ASAP2 is required for efficient FcγR-mediated phagocytosis. J Leukoc Biol 2016; 101:439-448. [PMID: 27601625 DOI: 10.1189/jlb.2a0316-156rr] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 08/07/2016] [Accepted: 08/10/2016] [Indexed: 12/17/2022] Open
Abstract
Effective activation of macrophages through phagocytic Fcγ receptors (FcγR) has been shown to require selenoprotein K (Selk). We set out to determine whether the FcγR-mediated uptake process itself also requires Selk and potential underlying mechanisms. Macrophages from Selk knockout (KO) mice were less efficient compared with wild-type (WT) controls in engulfing IgG-coated fluorescent beads. Using LC-MS/MS to screen for Selk-binding partners involved in FcγR-mediated phagocytosis, we identified Arf-GAP with SH3 domain, ANK repeat, and PH domain-containing protein 2 (ASAP2). Coimmunoprecipitation assays confirmed interactions between Selk and ASAP2. Selk was required for ASAP2 to be cleaved by calpain-2 within the Bin/Amphiphysin/Rvs (BAR) domain of ASAP2. BAR domains promote membrane association, which was consistent with our data showing that Selk deficiency led to retention of ASAP2 within the phagocytic cup. Because Selk was recently identified as a cofactor for the palmitoylation of certain proteins, we investigated whether ASAP2 was palmitoylated and whether this was related to its cleavage by calpain-2. Acyl/biotin exchange assays and MALDI-TOF analysis showed that cysteine-86 in ASAP2 was palmitoylated in WT, but to a much lesser extent in KO, mouse macrophages. Inhibitors of either palmitoylation or calpain-2 cleavage and rescue experiments with different versions of Selk demonstrated that Selk-dependent palmitoylation of ASAP2 leads to cleavage by calpain-2 within the BAR domain, which releases this protein from the maturing phagocytic cup. Overall, these findings identify ASAP2 as a new target of Selk-dependent palmitoylation and reveal a new mechanism regulating the efficiency of FcγR-mediated phagocytosis.
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Affiliation(s)
- Robert L Norton
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA; and
| | - Gregory J Fredericks
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA; and
| | - Zhi Huang
- Department of Biotechnology, College of Life Science and Technology, Jinan University, Guangzhou, P. R. China
| | - Jeffrey D Fay
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA; and
| | - FuKun W Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA; and
| | - Peter R Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA; and
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26
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Glastonbury C, Viñuela A, Buil A, Halldorsson G, Thorleifsson G, Helgason H, Thorsteinsdottir U, Stefansson K, Dermitzakis E, Spector T, Small K. Adiposity-Dependent Regulatory Effects on Multi-tissue Transcriptomes. Am J Hum Genet 2016; 99:567-579. [PMID: 27588447 PMCID: PMC5011064 DOI: 10.1016/j.ajhg.2016.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 07/01/2016] [Indexed: 10/25/2022] Open
Abstract
Obesity is a global epidemic that is causally associated with a range of diseases, including type 2 diabetes and cardiovascular disease, at the population-level. However, there is marked heterogeneity in obesity-related outcomes among individuals. This might reflect genotype-dependent responses to adiposity. Given that adiposity, measured by BMI, is associated with widespread changes in gene expression and regulatory variants mediate the majority of known complex trait loci, we sought to identify gene-by-BMI (G × BMI) interactions on the regulation of gene expression in a multi-tissue RNA-sequencing (RNA-seq) dataset from the TwinsUK cohort (n = 856). At a false discovery rate of 5%, we identified 16 cis G × BMI interactions (top cis interaction: CHURC1, rs7143432, p = 2.0 × 10(-12)) and one variant regulating 53 genes in trans (top trans interaction: ZNF423, rs3851570, p = 8.2 × 10(-13)), all in adipose tissue. The interactions were adipose-specific and enriched for variants overlapping adipocyte enhancers, and regulated genes were enriched for metabolic and inflammatory processes. We replicated a subset of the interactions in an independent adipose RNA-seq dataset (deCODE genetics, n = 754). We also confirmed the interactions with an alternate measure of obesity, dual-energy X-ray absorptiometry (DXA)-derived visceral-fat-volume measurements, in a subset of TwinsUK individuals (n = 682). The identified G × BMI regulatory effects demonstrate the dynamic nature of gene regulation and reveal a functional mechanism underlying the heterogeneous response to obesity. Additionally, we have provided a web browser allowing interactive exploration of the dataset, including of association between expression, BMI, and G × BMI regulatory effects in four tissues.
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27
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Tang J, Huang X, Wang L, Li Q, Xu J, Jia G, Liu G, Chen X, Shang H, Zhao H. Supranutritional dietary selenium depressed expression of selenoprotein genes in three immune organs of broilers. Anim Sci J 2016; 88:331-338. [DOI: 10.1111/asj.12645] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Revised: 03/26/2016] [Accepted: 04/07/2016] [Indexed: 12/28/2022]
Affiliation(s)
- Jiayong Tang
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
| | - Xiaofeng Huang
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
| | - Longqiong Wang
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
| | - Qiang Li
- Sichuan Provincial General Station for Animal Husbandry; Chengdu China
| | - Jinyang Xu
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
| | - Gang Jia
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
| | - Guangmang Liu
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
| | - Xiaoling Chen
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
| | - Haiying Shang
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
| | - Hua Zhao
- Animal Nutrition Institute; Sichuan Agricultural University; Chengdu Sichuan China
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28
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Howatt DA, Balakrishnan A, Moorleghen JJ, Muniappan L, Rateri DL, Uchida HA, Takano J, Saido TC, Chishti AH, Baud L, Subramanian V. Leukocyte Calpain Deficiency Reduces Angiotensin II-Induced Inflammation and Atherosclerosis But Not Abdominal Aortic Aneurysms in Mice. Arterioscler Thromb Vasc Biol 2016; 36:835-45. [PMID: 26966280 DOI: 10.1161/atvbaha.116.307285] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 02/27/2016] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Angiotensin II (AngII) infusion profoundly increases activity of calpains, calcium-dependent neutral cysteine proteases, in mice. Pharmacological inhibition of calpains attenuates AngII-induced aortic medial macrophage accumulation, atherosclerosis, and abdominal aortic aneurysm in mice. However, the precise functional contribution of leukocyte-derived calpains in AngII-induced vascular pathologies has not been determined. The purpose of this study was to determine whether calpains expressed in bone marrow (BM)-derived cells contribute to AngII-induced atherosclerosis and aortic aneurysms in hypercholesterolemic mice. APPROACH AND RESULTS To study whether leukocyte calpains contributed to AngII-induced aortic pathologies, irradiated male low-density lipoprotein receptor(-/-) mice were repopulated with BM-derived cells that were either wild-type or overexpressed calpastatin, the endogenous inhibitor of calpains. Mice were fed a fat-enriched diet and infused with AngII (1000 ng/kg per minute) for 4 weeks. Overexpression of calpastatin in BM-derived cells significantly attenuated AngII-induced atherosclerotic lesion formation in aortic arches, but had no effect on aneurysm formation. Using either BM-derived cells from calpain-1-deficient mice or mice with leukocyte-specific calpain-2 deficiency generated using cre-loxP recombination technology, further studies demonstrated that independent deficiency of either calpain-1 or -2 in leukocytes modestly attenuated AngII-induced atherosclerosis. Calpastatin overexpression significantly attenuated AngII-induced inflammatory responses in macrophages and spleen. Furthermore, calpain inhibition suppressed migration and adhesion of macrophages to endothelial cells in vitro. Calpain inhibition also significantly decreased hypercholesterolemia-induced atherosclerosis in the absence of AngII. CONCLUSIONS The present study demonstrates a pivotal role for BM-derived calpains in mediating AngII-induced atherosclerosis by influencing macrophage function.
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Affiliation(s)
- Deborah A Howatt
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Anju Balakrishnan
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Jessica J Moorleghen
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Latha Muniappan
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Debra L Rateri
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Haruhito A Uchida
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Jiro Takano
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Takaomi C Saido
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Athar H Chishti
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Laurent Baud
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.)
| | - Venkateswaran Subramanian
- From the Saha Cardiovascular Research Center (D.A.H., A.B., J.J.M., L.M., D.L.R.), and Department of Physiology (V.S.), University of Kentucky, Lexington; Department of Chronic Kidney Disease and Cardiovascular Disease, Okayama University School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan (H.A.U.); Laboratory for Proteolytic Neuroscience, RIKEN Brain Science Institute, Saitama, Japan (J.T., T.C.S.); Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA (A.H.C.); and INSERM, Université Pierre et Marie Curie-Paris, Paris, France (L.B.).
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29
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Abstract
SIGNIFICANCE Selenoproteins employ selenium to supplement the chemistry available through the common 20 amino acids. These powerful enzymes are affiliated with redox biology, often in connection with the detection, management, and signaling of oxidative stress. Among them, membrane-bound selenoproteins play prominent roles in signaling pathways, Ca(2+) regulation, membrane complexes integrity, and biosynthesis of lipophilic molecules. RECENT ADVANCES The number of selenoproteins whose physiological roles, protein partners, expression, evolution, and biosynthesis are characterized is steadily increasing, thus offering a more nuanced view of this specialized family. This review focuses on human membrane selenoproteins, particularly the five least characterized ones: selenoproteins I, K, N, S, and T. CRITICAL ISSUES Membrane-bound selenoproteins are the least understood, as it is challenging to provide the membrane-like environment required for their biochemical and biophysical characterization. Hence, their studies rely mostly on biological rather than structural and biochemical assays. Another aspect that has not received much attention is the particular role that their membrane association plays in their physiological function. FUTURE DIRECTIONS Findings cited in this review show that it is possible to infer the structure and the membrane-binding mode of these lesser-studied selenoproteins and design experiments to examine the role of the rare amino acid selenocysteine.
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Affiliation(s)
- Jun Liu
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware
| | - Sharon Rozovsky
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware
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Abstract
SIGNIFICANCE Selenoprotein K (SelK) is an endoplasmic reticulum (ER) membrane protein, and its expression is sensitive to dietary selenium levels. A recently described role for SelK as a cofactor in catalyzing protein palmitoylation reactions provides an important link between low dietary selenium intake and suboptimal cellular functions that depend on this selenoprotein for palmitoylation. RECENT ADVANCES A recent breakthrough provided insight into the contribution of SelK to calcium (Ca(2+)) flux in immune cells. In particular, SelK is required for palmitoylation of the Ca(2+) channel protein, inositol-1,4,5-triphosphate receptor (IP3R) in the ER membrane. Without this post-translational modification, expression and function of the IP3R is impaired. SelK is required for palmitoylation of another transmembrane protein, CD36, and very likely other proteins. SelK serves as a cofactor during protein palmitoylation by binding to the protein acyltransferase, DHHC6, thereby facilitating addition of the palmitate via a thioester bond to the sulfhydryl group of cysteine residues of target proteins. CRITICAL ISSUES The association of DHHC6 and SelK is clearly important for immune cell functions and possibly other cell types. The step in the DHHC6 catalyzed S-acylation reaction on which SelK acts remains unclear and possible mechanisms of how the kinetics of the reaction are impacted by SelK binding to DHHC6 are presented here. FUTURE DIRECTIONS Uncovering the specific role of SelK in promoting DHHC6 catalyzed protein palmitoylation may open a new line of inquiry into other selenoproteins playing similar roles as cofactors for different enzymatic processes.
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Affiliation(s)
- Gregory J Fredericks
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
| | - Peter R Hoffmann
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii , Honolulu, Hawaii
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31
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Abstract
BACKGROUND An important role has emerged for calpain enzymes in regulating inflammation with one isoform, calpain-2, particularly important for macrophage activation. The goal of this study was to determine the therapeutic potential of a synthetic calpain-2 inhibitor, zLLY-CH2F, for colitis and inflammation-associated colorectal cancer. METHODS Mice were then subjected to the azoxymethane/dextran sulfate sodium model of colitis and colitis-associated cancer incorporating intervention with daily injections of 0.75 mg/kg calpain-2 inhibitor beginning after the first signs of colitis. RESULTS Calpain-2 inhibitor treatment alleviated weight loss and bloody diarrhea, and reduced inflammatory infiltration into colon tissues and inflammatory cytokine mRNA. Calpain-2 inhibitor intervention also reduced total colitis-associated cancer tumor volume by up to 70% in vehicle control mice and decreased cancer pathology scores of blinded histological colon tissue analyses. Mechanistic investigations showed that calpain-2 inhibition during macrophage activation reduced inhibitor of kappa beta (IκB) degradation and nuclear factor kappa beta (NFκB) nuclear localization as well as secretion of specific inflammatory cytokines. In addition, calpain-2 inhibitor treatment of CT26.WT mouse and HT-29 human colorectal cancer cells decreased proliferation and reduced IκB degradation and NFκB translocation. CONCLUSIONS Overall, these findings suggest that intervention with a calpain-2 inhibitor may reduce colitis and colitis-associated cancer through a two-hit process of limiting macrophage activation and inhibiting growth of the colorectal cancer cells themselves.
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32
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Ba HV, Reddy BV, Hwang I. Role of calpastatin in the regulation of mRNA expression of calpain, caspase, and heat shock protein systems in bovine muscle satellite cells. In Vitro Cell Dev Biol Anim 2014; 51:447-54. [PMID: 25487673 DOI: 10.1007/s11626-014-9849-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 11/12/2014] [Indexed: 12/24/2022]
Abstract
Calpastatin participates in apoptotic cell death and cell signaling, but its role in skeletal myoblast development and molecular involvements in cell growth still remains unknown. The current study aimed to investigate the role of calpastatin on the expression patterns of calpains, caspases, and heat shock proteins (HSPs). In addition, the cell viability during myoblast growth under calpastatin silence condition was also investigated. Three small interference RNA sequences (siRNAs) were used to silence calpastatin gene and ligated into pSilencer plasmid vector to construct short hairpin RNA (shRNA) expression. The all three siRNAs significantly silence the calpastatin gene. Moreover, suppression of calpastatin significantly reduced the viability of myoblasts during growth phase when compared to control cells. Additionally, knockdown of calpastatin significantly increased the mRNA expression of μ-calpain, caspase-3, caspase-7, and caspase-9, as well as HSP-27, -70, and -90. The present study results suggested that the suppression of calpastatin resulted in the increased expression of μ-calpain, caspases, and HSPs which in turn regulate the apoptotic cell death. The present study throws light on the central role of calpastatin in the control of calpain activity, cell proliferation, cell survival, and apoptotic pathways.
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Affiliation(s)
- Hoa Van Ba
- Department of Animal Science and BK21 PLUS program, Chonbuk National University, Jeonju, 561-756, South Korea
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33
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Pitts MW, Byrns CN, Ogawa-Wong AN, Kremer P, Berry MJ. Selenoproteins in nervous system development and function. Biol Trace Elem Res 2014; 161:231-45. [PMID: 24974905 PMCID: PMC4222985 DOI: 10.1007/s12011-014-0060-2] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2014] [Accepted: 06/23/2014] [Indexed: 01/03/2023]
Abstract
Selenoproteins are a distinct class of proteins that are characterized by the co-translational incorporation of selenium (Se) in the form of the 21st amino acid selenocysteine. Selenoproteins provide a key defense against oxidative stress, as many of these proteins participate in oxidation-reduction reactions neutralizing reactive oxygen species, where selenocysteine residues act as catalytic sites. Many selenoproteins are highly expressed in the brain, and mouse knockout studies have determined that several are required for normal brain development. In parallel with these laboratory studies, recent reports of rare human cases with mutations in genes involved in selenoprotein biosynthesis have described individuals with an assortment of neurological problems that mirror those detailed in knockout mice. These deficits include impairments in cognition and motor function, seizures, hearing loss, and altered thyroid metabolism. Additionally, due to the fact that oxidative stress is a key feature of neurodegenerative disease, there is considerable interest in the therapeutic potential of selenium supplementation for human neurological disorders. Studies performed in cell culture and rodent models have demonstrated that selenium administration attenuates oxidative stress, prevents neurodegeneration, and counters cell signaling mechanisms known to be dysregulated in certain disease states. However, there is currently no definitive evidence in support of selenium supplementation to prevent and/or treat common neurological conditions in the general population. It appears likely that, in humans, supplementation with selenium may only benefit certain subpopulations, such as those that are either selenium-deficient or possess genetic variants that affect selenium metabolism.
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Affiliation(s)
- Matthew W Pitts
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, 651 Ilalo St, Honolulu, HI, 96813, USA,
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Liu J, Zhang Z, Rozovsky S. Selenoprotein K form an intermolecular diselenide bond with unusually high redox potential. FEBS Lett 2014; 588:3311-21. [PMID: 25117454 DOI: 10.1016/j.febslet.2014.07.037] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 07/17/2014] [Accepted: 07/22/2014] [Indexed: 11/16/2022]
Abstract
Selenoprotein K (SelK) is a membrane protein involved in antioxidant defense, calcium regulation and the ER-associated protein degradation pathway. We found that SelK exhibits a peroxidase activity with a rate that is low but within the range of other peroxidases. Notably, SelK reduced hydrophobic substrates, such as phospholipid hydroperoxides, which damage membranes. Thus, SelK might be involved in membrane repair or related pathways. SelK was also found to contain a diselenide bond-the first intramolecular bond of that kind reported for a selenoprotein. The redox potential of SelK was -257 mV, significantly higher than that of diselenide bonds in small molecules or proteins. Consequently, SelK can be reduced by thioredoxin reductase. These finding are essential for understanding SelK activity and function.
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Affiliation(s)
- Jun Liu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Zhengqi Zhang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Sharon Rozovsky
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States.
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35
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Adamson S, Browning R, Singh P, Nobles S, Villarreal A, Karim S. Transcriptional activation of antioxidants may compensate for selenoprotein deficiencies in Amblyomma maculatum (Acari: Ixodidae) injected with selK- or selM-dsRNA. INSECT MOLECULAR BIOLOGY 2014; 23:497-510. [PMID: 24698418 PMCID: PMC4107163 DOI: 10.1111/imb.12098] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The Gulf-Coast tick, Amblyomma maculatum, possesses an elaborate set of selenoproteins, which prevent the deleterious effects from oxidative stress that would otherwise occur during feeding. In the current work, we examined the role of selenoprotein K (SelK) and selenoprotein M (SelM) in feeding A. maculatum by bioinformatics, transcriptional gene expression, RNA interference and antioxidant assays. The transcriptional expression of SelK did not vary significantly in salivary glands or midguts throughout the bloodmeal. However, there was a 58-fold increase in transcript levels of SelM in tick midguts. Ticks injected with selK-dsRNA or selM-dsRNA did not reveal any observable differences in egg viability but oviposition was reduced. Surprisingly, salivary antioxidant activity was higher in selenoprotein knockouts compared with controls, which is probably the result of compensatory transcriptional expression of genes involved in combating reactive oxygen species. In fact, quantitative real-time PCR data suggest that the transcriptional expression of catalase increased in ticks injected with selM-double-stranded RNA. Additionally, the transcriptional expression of selN decreased ∼90% in both SelK/SelM knockdowns. These data indicate that SelK and SelM are salivary antioxidants but are not essential for tick survival or reproduction and are compensated by other antioxidant systems.
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Affiliation(s)
- S Adamson
- Department of Biological Sciences, The University of Southern Mississippi, Hattiesburg, MS, USA
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36
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Roman M, Jitaru P, Barbante C. Selenium biochemistry and its role for human health. Metallomics 2014; 6:25-54. [DOI: 10.1039/c3mt00185g] [Citation(s) in RCA: 421] [Impact Index Per Article: 42.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Kumar V, Everingham S, Hall C, Greer PA, Craig AWB. Calpains promote neutrophil recruitment and bacterial clearance in an acute bacterial peritonitis model. Eur J Immunol 2013; 44:831-41. [PMID: 24375267 DOI: 10.1002/eji.201343757] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Revised: 10/15/2013] [Accepted: 11/29/2013] [Indexed: 12/20/2022]
Abstract
Activation of the innate immune system is critical for clearance of bacterial pathogens to limit systemic infections and host tissue damage. Here, we report a key role for calpain proteases in bacterial clearance in mice with acute peritonitis. Using transgenic mice expressing Cre recombinase primarily in innate immune cells (fes-Cre), we generated conditional capns1 knockout mice. Consistent with capns1 being essential for stability and function of the ubiquitous calpains (calpain-1, calpain-2), peritoneal cells from these mice had reduced levels of calpain-2/capns1, and reduced proteolysis of their substrate selenoprotein K. Using an acute bacterial peritonitis model, we observed impaired bacterial killing within the peritoneum and development of bacteremia in calpain knockout mice. These defects correlated with significant reductions in IL-1α release, neutrophil recruitment, and generation of reactive oxygen species in calpain knockout mice with acute bacterial peritonitis. Peritoneal macrophages from calpain knockout mice infected with enterobacteria ex vivo, were competent in phagocytosis of bacteria, but showed impaired clearance of intracellular bacteria compared with control macrophages. Together, these results implicate calpains as key mediators of effective innate immune responses to acute bacterial infections, to prevent systemic dissemination of bacteria that can lead to sepsis.
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Affiliation(s)
- Vijay Kumar
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
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38
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Vaisid T, Kosower NS. Calpastatin is upregulated in non-immune neuronal cells via toll-like receptor 2 (TLR2) pathways by lipid-containing agonists. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2013; 1833:2369-77. [DOI: 10.1016/j.bbamcr.2013.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 05/15/2013] [Accepted: 06/05/2013] [Indexed: 01/15/2023]
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Huang Z, Rose AH, Hoffmann FW, Hashimoto AS, Bertino P, Denk T, Takano J, Iwata N, Saido TC, Hoffmann PR. Calpastatin prevents NF-κB-mediated hyperactivation of macrophages and attenuates colitis. THE JOURNAL OF IMMUNOLOGY 2013; 191:3778-88. [PMID: 23986533 DOI: 10.4049/jimmunol.1300972] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Calpain enzymes proteolytically modulate cellular function and have been implicated in inflammatory diseases. In this study, we found that calpain levels did not differ between intestinal tissues from inflammatory bowel disease (IBD) patients and healthy controls, but IBD tissues showed increased levels of the endogenous calpain inhibitor, calpastatin (CAST). To investigate the role of CAST in the immune system during IBD, mice were x-ray irradiated, reconstituted with either CAST-knockout (KO) or wild-type (WT) bone marrow, and subjected to dextran sulfate sodium-induced colitis. CAST-KO recipients with induced colitis exhibited more severe weight loss, bloody diarrhea, and anemia compared with WT controls. Histological evaluation of colons from KO recipients with colitis revealed increased inflammatory pathology. Macrophages purified from the colons of KO recipients had higher IL-6, TNF-α, and IFN-γ mRNA levels compared with WT controls. Mechanistic investigations using small interfering RNA and KO bone marrow to generate CAST-deficient macrophages showed that CAST deficiency during activation with bacterial pathogen associated molecular patterns, including heat-killed Enterococcus faecalis or CpG DNA, led to increased IκB cleavage, NF-κB nuclear localization, and IL-6 and TNF-α secretion. Thus, CAST plays a central role in regulating macrophage activation and limiting pathology during inflammatory disorders like IBD.
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Affiliation(s)
- Zhi Huang
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI 96813
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40
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Meiler S, Baumer Y, Huang Z, Hoffmann FW, Fredericks GJ, Rose AH, Norton RL, Hoffmann PR, Boisvert WA. Selenoprotein K is required for palmitoylation of CD36 in macrophages: implications in foam cell formation and atherogenesis. J Leukoc Biol 2013; 93:771-80. [PMID: 23444136 DOI: 10.1189/jlb.1212647] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Selk is an ER transmembrane protein important for calcium flux and macrophage activation, but its role in foam cell formation and atherosclerosis has not been evaluated. BMDMs from Selk(-/-) mice exhibited decreased uptake of modLDL and foam cell formation compared with WT controls, and the differences were eliminated with anti-CD36 blocking antibody. CD36 expression was decreased in TNF-α-stimulated Selk(-/-) BMDMs compared with WT controls. Fluorescence microscopy revealed TNF-α-induced clustering of CD36 in WT BMDMs indicative of lipid raft localization, which was absent in Selk(-/-) BMDMs. Fractionation revealed lower levels of CD36 reaching lipid rafts in TNF-α-stimulated Selk(-/-) BMDMs. Immunoprecipitation showed that Selk(-/-) BMDMs have decreased CD36 palmitoylation, which occurs at the ER membrane and is crucial for stabilizing CD36 expression and directing its localization to lipid rafts. To assess if this phenomenon had a role in atherogenesis, a HFD was fed to irradiated Ldlr(-/-) mice reconstituted with BM from Selk(-/-) or WT mice. Selk was detected in aortic plaques of controls, particularly in macrophages. Selk(-/-) in immune cells led to reduction in atherosclerotic lesion formation without affecting leukocyte migration into the arterial wall. These findings suggest that Selk is important for stable, localized expression of CD36 in macrophages during inflammation, thereby contributing to foam cell formation and atherogenesis.
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Affiliation(s)
- Svenja Meiler
- Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96813, USA
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41
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Banerjee HN, Hyman G, Evans S, Manglik V, Gwebu E, Banerjee A, Vaughan D, Medley J, Krauss C, Wilkins J, Smith V, Banerji A, Rousch J. Identification of the Transmembrane Glucose Regulated Protein 78 as a Biomarker for the Brain Cancer Glioblastoma Multiforme by Gene Expression and Proteomic Studies. ACTA ACUST UNITED AC 2013. [PMID: 26207187 PMCID: PMC4508859 DOI: 10.4172/2155-9589.1000126] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The prognosis of patients with Glioblastoma Multiforme (GBM), the most malignant adult glial brain tumor, remains poor in spite of advances in treatment procedures, including surgical resection, irradiation and chemotherapy. Genetic heterogeneity of GBM warrants extensive studies to gain a thorough understanding of the biology of this tumor. While there have been several studies of global transcript profiling of glioma with the identification of gene signatures for diagnosis and disease management, translation into clinics is yet to happen. In the present study, we report a novel proteomic approach by using two-dimensional difference gel electrophoresis (2D-DIGE) followed by spot picking and analysis of proteins/peptides by Mass Spectrometry. We report Glucose Regulated Protein 78 (GRP78) as a differentially expressed protein in the GBM cell line compared to human normal Astrocyte cells. In addition to proteomic studies, we performed microarray analysis which further confirmed up regulation of GRP78 in GBM cells compared to human normal Astrocyte cells. GRP78 has long been recognized as a molecular chaperone in the endoplasmic reticulum (ER) and can be induced by the ER stress response. Besides its location in the ER, GRP78 has been found in cell plasma membrane, cytoplasm, mitochondria, nucleus and other cellular secretions. GRP78 is implicated in tumor cell proliferation, apoptosis resistance, immune escape, metastasis and angiogenesis, and its elevated expression usually correlates with a variety of tumor micro environmental stresses, including hypoxia, glucose deprivation, lactic acidosis and inflammatory response. GRP78 protein acts as a centrally located sensor of stress, which senses and facilitates the adaptation to the tumor microenvironment. Our findings showed differential expression of this gene in brain cancer GBM and thus confirm similarities in findings in existing transcriptional and translational studies. Thus, these findings could be of further importance for diagnostic, therapeutic and prognostic approaches for dealing with this highly malignant cancer.
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Affiliation(s)
- H N Banerjee
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA ; Department of Pharmaceutical Sciences, Elizabeth City State University, Elizabeth City, NC, USA
| | - G Hyman
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - S Evans
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - V Manglik
- Department of Mathematics and Computer Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - E Gwebu
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - A Banerjee
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - D Vaughan
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - J Medley
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - C Krauss
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - J Wilkins
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - V Smith
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
| | - A Banerji
- Department of Pharmaceutical Sciences, Elizabeth City State University, Elizabeth City, NC, USA
| | - J Rousch
- Department of Natural Science, Elizabeth City State University, Elizabeth City, NC, USA
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42
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Abstract
Selenium is an essential micronutrient in mammals, but is also recognized as toxic in excess. It is a non-metal with properties that are intermediate between the chalcogen elements sulfur and tellurium. Selenium exerts its biological functions through selenoproteins. Selenoproteins contain selenium in the form of the 21st amino acid, selenocysteine (Sec), which is an analog of cysteine with the sulfur-containing side chain replaced by a Se-containing side chain. Sec is encoded by the codon UGA, which is one of three termination codons for mRNA translation in non-selenoprotein genes. Recognition of the UGA codon as a Sec insertion site instead of stop requires a Sec insertion sequence (SECIS) element in selenoprotein mRNAs and a unique selenocysteyl-tRNA, both of which are recognized by specialized protein factors. Unlike the 20 standard amino acids, Sec is biosynthesized from serine on its tRNA. Twenty-five selenoproteins are encoded in the human genome. Most of the selenoprotein genes were discovered by bioinformatics approaches, searching for SECIS elements downstream of in-frame UGA codons. Sec has been described as having stronger nucleophilic and electrophilic properties than cysteine, and Sec is present in the catalytic site of all selenoenzymes. Most selenoproteins, whose functions are known, are involved in redox systems and signaling pathways. However, several selenoproteins are not well characterized in terms of their function. The selenium field has grown dramatically in the last few decades, and research on selenium biology is providing extensive new information regarding its importance for human health.
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Affiliation(s)
- Suguru Kurokawa
- Department of Cell & Molecular Biology, John A. Burns School of Medicine, University of Hawaii at Manoa, Honolulu, HI, 96813, USA,
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Liu J, Srinivasan P, Pham DN, Rozovsky S. Expression and purification of the membrane enzyme selenoprotein K. Protein Expr Purif 2012; 86:27-34. [PMID: 22963794 DOI: 10.1016/j.pep.2012.08.014] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 08/18/2012] [Accepted: 08/20/2012] [Indexed: 12/18/2022]
Abstract
Selenoprotein K (SelK) is a membrane protein residing in the endoplasmic reticulum. The function of SelK is mostly unknown; however, it has been shown to participate in anti-oxidant defense, calcium regulation and in the endoplasmic reticulum associated protein degradation (ERAD) pathway. In order to study the function of SelK and the role of selenocysteine in catalysis, we have tested heterologous expression of human SelK in E. coli. Consequently, we have developed an over-expression strategy that exploits the maltose binding protein as a fusion partner to stabilize and solubilize SelK. The fusion partner can be cleaved from SelK in the presence of a variety of detergents compatible with structural characterization and the protein purified to homogeneity. SelK acquires a helical secondary structure in detergent micelles, even though it was predicted to be an intrinsically disordered protein due to its high percentage of polar residues. The same strategy was successfully applied to preparation of SelK binding partner - selenoprotein S (SelS). Hence, this heterologous expression and purification strategy can be applied to other members of the membrane enzyme family to which SelK belongs.
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Affiliation(s)
- Jun Liu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
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Banerjee HN, Mahaffey K, Riddick E, Banerjee A, Bhowmik N, Patra M. Search for a diagnostic/prognostic biomarker for the brain cancer glioblastoma multiforme by 2D-DIGE-MS technique. Mol Cell Biochem 2012; 367:59-63. [PMID: 22547198 DOI: 10.1007/s11010-012-1319-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2012] [Accepted: 04/18/2012] [Indexed: 12/22/2022]
Abstract
The prognosis of patients with glioblastoma multiforme, the most malignant adult glial brain tumor, remains poor in spite of advances in treatment procedures, including surgical resection, irradiation, and chemotherapy. Genetic heterogeneity of glioblastoma warrants extensive studies to gain a thorough understanding of the biology of this tumor. While there have been several studies of global transcript profiling of glioma with the identification of gene signatures for diagnosis and disease management, translation into clinics is yet to happen. In the present study, we report a novel proteomic approach by using two-dimensional difference gel electrophoresis followed by spot picking and analysis of proteins/peptides by Mass spectrometry. We report at least ten different novel proteins/peptides as identified by this technique which are differentially expressed in this cancer and could be of further importance for diagnostic, therapeutic, and prognostic approaches.
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Affiliation(s)
- Hirendra Nath Banerjee
- Department of Biological and Pharmaceutical Sciences, Elizabeth City State University, University of North Carolina, Elizabeth City, NC 27909, USA.
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Huang Z, Rose AH, Hoffmann PR. The role of selenium in inflammation and immunity: from molecular mechanisms to therapeutic opportunities. Antioxid Redox Signal 2012; 16:705-43. [PMID: 21955027 PMCID: PMC3277928 DOI: 10.1089/ars.2011.4145] [Citation(s) in RCA: 529] [Impact Index Per Article: 44.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Dietary selenium (]Se), mainly through its incorporation into selenoproteins, plays an important role in inflammation and immunity. Adequate levels of Se are important for initiating immunity, but they are also involved in regulating excessive immune responses and chronic inflammation. Evidence has emerged regarding roles for individual selenoproteins in regulating inflammation and immunity, and this has provided important insight into mechanisms by which Se influences these processes. Se deficiency has long been recognized to negatively impact immune cells during activation, differentiation, and proliferation. This is related to increased oxidative stress, but additional functions such as protein folding and calcium flux may also be impaired in immune cells under Se deficient conditions. Supplementing diets with above-adequate levels of Se can also impinge on immune cell function, with some types of inflammation and immunity particularly affected and sexually dimorphic effects of Se levels in some cases. In this comprehensive article, the roles of Se and individual selenoproteins in regulating immune cell signaling and function are discussed. Particular emphasis is given to how Se and selenoproteins are linked to redox signaling, oxidative burst, calcium flux, and the subsequent effector functions of immune cells. Data obtained from cell culture and animal models are reviewed and compared with those involving human physiology and pathophysiology, including the effects of Se levels on inflammatory or immune-related diseases including anti-viral immunity, autoimmunity, sepsis, allergic asthma, and chronic inflammatory disorders. Finally, the benefits and potential adverse effects of intervention with Se supplementation for various inflammatory or immune disorders are discussed.
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Affiliation(s)
- Zhi Huang
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii, USA
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Elkind E, Vaisid T, Kornspan JD, Barnoy S, Rottem S, Kosower NS. Calpastatin upregulation in Mycoplasma hyorhinis-infected cells is promoted by the mycoplasma lipoproteins via the NF-κB pathway. Cell Microbiol 2012; 14:840-51. [PMID: 22288381 DOI: 10.1111/j.1462-5822.2012.01760.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Mycoplasma hyorhinis frequently contaminates cultured cells, with effects on synthetic and metabolic pathways. We demonstrated for the first time that contamination of cells by a strain of M. hyorhinis (NDMh) results in increased levels of calpastatin (the endogenous inhibitor of the ubiquitous Ca(2+) -dependent protease calpain). We now show that the calpastatin upregulation by NDMh in neuroblastoma SH-SY5Y cells resides in the NDMh lipoprotein fraction (LPP), via the NF-κB transcription pathway. NF-κB activation requires dissociation of the cytoplasmic NF-κB/IκB complex followed by NF-κB translocation to the nucleus. NDMh-LPP induced translocation of the NF-κB RelA subunit to the nucleus and upregulated calpastatin. RelA translocation and calpastatin elevation were prevented when dissociation of the NF-κB/IκB complex was inhibited either by transfection with the non-phosphorylatable IκB mutant ΔNIκBα, or by using PS1145, an inhibitor of the IκB kinase (IKK complex). Increased calpastatin levels attenuate calpain-related amyloid-β-peptide and Ca(2+) -toxicity (these are central to the pathogenesis of Alzheimer's Disease). LPP-induced elevation of calpastatin provides an example of effects on non-inflammatory intracellular proteins, the outcome being significant alterations in host cell functions. Since calpastatin level is important in the control of calpain activity, mycoplasmal LPP may be of interest in treating some pathological processes involving excessive calpain activation.
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Affiliation(s)
- Esther Elkind
- Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel-Aviv University, Ramat-Aviv, Tel-Aviv 69978, Israel
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Huang Z, Hoffmann FW, Fay JD, Hashimoto AC, Chapagain ML, Kaufusi PH, Hoffmann PR. Stimulation of unprimed macrophages with immune complexes triggers a low output of nitric oxide by calcium-dependent neuronal nitric-oxide synthase. J Biol Chem 2011; 287:4492-502. [PMID: 22205701 DOI: 10.1074/jbc.m111.315598] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Immune complexes composed of IgG-opsonized pathogens, particles, or proteins are phagocytosed by macrophages through Fcγ receptors (FcγRs). Macrophages primed with IFNγ or other pro-inflammatory mediators respond to FcγR engagement by secreting high levels of cytokines and nitric oxide (NO). We found that unprimed macrophages produced lower levels of NO, which required efficient calcium (Ca(2+)) flux as demonstrated by using macrophages lacking selenoprotein K, which is required for FcγR-induced Ca(2+) flux. Thus, we further investigated the signaling pathways involved in low output NO and its functional significance. Evaluation of inducible, endothelial, and neuronal nitric-oxide synthases (iNOS, eNOS, and nNOS) revealed that FcγR stimulation in unprimed macrophages caused a marked Ca(2+)-dependent increase in both total and phosphorylated nNOS and slightly elevated levels of phosphorylated eNOS. Also activated were three MAP kinases, ERK, JNK, and p38, of which ERK activation was highly dependent on Ca(2+) flux. Inhibition of ERK reduced both nNOS activation and NO secretion. Finally, Transwell experiments showed that FcγR-induced NO functioned to increase the phagocytic capacity of other macrophages and required both NOS and ERK activity. The production of NO by macrophages is conventionally attributed to iNOS, but we have revealed an iNOS-independent receptor/enzyme system in unprimed macrophages that produces low output NO. Under these conditions, FcγR engagement relies on Ca(2+)-dependent ERK phosphorylation, which in turn increases nNOS and, to a lesser extent, eNOS, both of which produce low levels of NO that function to promote phagocytosis.
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Affiliation(s)
- Zhi Huang
- Department of Cell and Molecular Biology, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii 96813, USA
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Shchedrina VA, Everley RA, Zhang Y, Gygi SP, Hatfield DL, Gladyshev VN. Selenoprotein K binds multiprotein complexes and is involved in the regulation of endoplasmic reticulum homeostasis. J Biol Chem 2011; 286:42937-48. [PMID: 22016385 DOI: 10.1074/jbc.m111.310920] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Selenoprotein K (SelK) is an 11-kDa endoplasmic reticulum (ER) protein of unknown function. Herein, we defined a new eukaryotic protein family that includes SelK, selenoprotein S (SelS), and distantly related proteins. Comparative genomics analyses indicate that this family is the most widespread eukaryotic selenoprotein family. A biochemical search for proteins that interact with SelK revealed ER-associated degradation (ERAD) components (p97 ATPase, Derlins, and SelS). In this complex, SelK showed higher affinity for Derlin-1, whereas SelS had higher affinity for Derlin-2, suggesting that these selenoproteins could determine the nature of the substrate translocated through the Derlin channel. SelK co-precipitated with soluble glycosylated ERAD substrates and was involved in their degradation. Its gene contained a functional ER stress response element, and its expression was up-regulated by conditions that induce the accumulation of misfolded proteins in the ER. Components of the oligosaccharyltransferase complex (ribophorins, OST48, and STT3A) and an ER chaperone, calnexin, were found to bind SelK. A glycosylated form of SelK was also detected, reflecting its association with the oligosaccharyltransferase complex. These data suggest that SelK is involved in the Derlin-dependent ERAD of glycosylated misfolded proteins and that the function defined by the prototypic SelK is the widespread function of selenium in eukaryotes.
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Affiliation(s)
- Valentina A Shchedrina
- Division of Genetics, Department of Medicine, Brigham & Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
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