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Ding Z, Liu C, Zhang Z, Zhang C, Huang F. Effect of mitochondrial calcium homeostasis-mediated endogenous enzyme activation on tenderness of beef muscle based on MCU modulators. Food Chem X 2024; 22:101366. [PMID: 38623508 PMCID: PMC11016958 DOI: 10.1016/j.fochx.2024.101366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/24/2024] [Accepted: 04/05/2024] [Indexed: 04/17/2024] Open
Abstract
The mitochondrial calcium uniporter (MCU) occupies a noteworthy position in the regulation of mitochondrial calcium uptake. This study investigated the effects of MCU modulator-mediated mitochondrial calcium on mitochondrial dysfunction, oxidative stress, endogenous enzyme activities, and tenderness during postmortem aging. Spermine, as an activator of MCU, resulted in an increase in mitochondrial calcium levels, not only disrupting mitochondrial morphology but also triggering mitochondrial oxidative stress and downregulation of antioxidant factors. Additionally, the spermine group underwent later activation of calpain and earlier activation of caspases, as well as the myofibril fragmentation index was initially lower and then higher compared with control group, indicating that endogenous enzymes played an indispensable role in different aging periods. Interestingly, the results of the Ru360 (an inhibitor of MCU) group were opposite to those aforementioned findings. Our data provide a novel perspective on the regulatory mechanism of mitochondrial calcium homeostasis mediated by MCU on tenderness.
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Affiliation(s)
- Zhenjiang Ding
- Beijing Key Laboratory of the Innovative Development of Functional Staple and Nutritional Intervention for Chronic Diseases, China National Research Institute of Food and Fermentation Industries, Beijing 100015, China
| | - Chunmei Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Zihan Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Chunhui Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
| | - Feng Huang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Products Processing, Ministry of Agriculture and Rural Affairs, Beijing 100193, China
- Western Agricultural Research Center, Chinese Academy of Agricultural Sciences, Changji 831100, China
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Wang J, Zou J, Shi Y, Zeng N, Guo D, Wang H, Zhao C, Luan F, Zhang X, Sun J. Traditional Chinese medicine and mitophagy: A novel approach for cardiovascular disease management. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 128:155472. [PMID: 38461630 DOI: 10.1016/j.phymed.2024.155472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Revised: 02/06/2024] [Accepted: 02/20/2024] [Indexed: 03/12/2024]
Abstract
BACKGROUND Cardiovascular disease (CVD) remains the leading cause of morbidity and mortality worldwide, imposing an enormous economic burden on individuals and human society. Laboratory studies have identified several drugs that target mitophagy for the prevention and treatment of CVD. Only a few of these drugs have been successful in clinical trials, and most studies have been limited to animal and cellular models. Furthermore, conventional drugs used to treat CVD, such as antiplatelet agents, statins, and diuretics, often result in adverse effects on patients' cardiovascular, metabolic, and respiratory systems. In contrast, traditional Chinese medicine (TCM) has gained significant attention for its unique theoretical basis and clinical efficacy in treating CVD. PURPOSE This paper systematically summarizes all the herbal compounds, extracts, and active monomers used to target mitophagy for the treatment of CVD in the last five years. It provides valuable information for researchers in the field of basic cardiovascular research, pharmacologists, and clinicians developing herbal medicines with fewer side effects, as well as a useful reference for future mitophagy research. METHODS The search terms "cardiovascular disease," "mitophagy," "herbal preparations," "active monomers," and "cardiac disease pathogenesis" in combination with "natural products" and "diseases" were used to search for studies published in the past five years until January 2024. RESULTS Studies have shown that mitophagy plays a significant role in the progression and development of CVD, such as atherosclerosis (AS), heart failure (HF), myocardial infarction (MI), myocardial ischemia/reperfusion injury (MI/RI), cardiac hypertrophy, cardiomyopathy, and arrhythmia. Herbal compound preparations, crude extracts, and active monomers have shown potential as effective treatments for these conditions. These substances protect cardiomyocytes by inducing mitophagy, scavenging damaged mitochondria, and maintaining mitochondrial homeostasis. They display notable efficacy in combating CVD. CONCLUSION TCM (including herbal compound preparations, extracts, and active monomers) can treat CVD through various pharmacological mechanisms and signaling pathways by inducing mitophagy. They represent a hotspot for future cardiovascular basic research and a promising candidate for the development of future cardiovascular drugs with fewer side effects and better therapeutic efficacy.
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Affiliation(s)
- Jinhui Wang
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Junbo Zou
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Yajun Shi
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Nan Zeng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, Sichuan, PR China
| | - Dongyan Guo
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - He Wang
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Chongbo Zhao
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China
| | - Fei Luan
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China.
| | - Xiaofei Zhang
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China.
| | - Jing Sun
- Shaanxi Key Laboratory of Chinese Medicine Fundamentals and New Drugs Research, School of Pharmacy, Shaanxi University of Chinese Medicine, Xi'an 712046, Shaanxi, PR China.
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Šafranek M, Shumbusho A, Johansen W, Šarkanová J, Voško S, Bokor B, Jásik J, Demko V. Membrane-anchored calpains - hidden regulators of growth and development beyond plants? FRONTIERS IN PLANT SCIENCE 2023; 14:1289785. [PMID: 38173928 PMCID: PMC10762896 DOI: 10.3389/fpls.2023.1289785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 12/04/2023] [Indexed: 01/05/2024]
Abstract
Calpains are modulatory proteases that modify diverse cellular substrates and play essential roles in eukaryots. The best studied are animal cytosolic calpains. Here, we focus on enigmatic membrane-anchored calpains, their structural and functional features as well as phylogenetic distribution. Based on domain composition, we identified four types of membrane-anchored calpains. Type 1 and 2 show broad phylogenetic distribution among unicellular protists and streptophytes suggesting their ancient evolutionary origin. Type 3 and 4 diversified early and are present in brown algae and oomycetes. The plant DEK1 protein is the only representative of membrane-anchored calpains that has been functionally studied. Here, we present up to date knowledge about its structural features, putative regulation, posttranslational modifications, and biological role. Finally, we discuss potential model organisms and available tools for functional studies of membrane-anchored calpains with yet unknown biological role. Mechanistic understanding of membrane-anchored calpains may provide important insights into fundamental principles of cell polarization, cell fate control, and morphogenesis beyond plants.
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Affiliation(s)
- Martin Šafranek
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Alain Shumbusho
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia
| | - Wenche Johansen
- Faculty of Applied Ecology, Agricultural Sciences and Biotechnology, Inland Norway University of Applied Sciences, Hamar, Norway
| | - Júlia Šarkanová
- Comenius University Science Park, Comenius University in Bratislava, Bratislava, Slovakia
| | - Stanislav Voško
- Comenius University Science Park, Comenius University in Bratislava, Bratislava, Slovakia
| | - Boris Bokor
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia
- Comenius University Science Park, Comenius University in Bratislava, Bratislava, Slovakia
| | - Ján Jásik
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Viktor Demko
- Institute of Botany, Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia
- Department of Plant Physiology, Faculty of Natural Sciences, Comenius University in Bratislava, Bratislava, Slovakia
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Zou B, Jia F, Ji L, Li X, Dai R. Effects of mitochondria on postmortem meat quality: characteristic, isolation, energy metabolism, apoptosis and oxygen consumption. Crit Rev Food Sci Nutr 2023:1-24. [PMID: 37452658 DOI: 10.1080/10408398.2023.2235435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
Meat quality holds significant importance for both consumers and meat producers. Various factors influence meat quality, and among them, mitochondria play a crucial role. Recent studies have indicated that mitochondria can sustain their functions and viability for a certain duration in postmortem muscles. Consequently, mitochondria have an impact on oxygen consumption, energy metabolism, and apoptotic processes, which in turn affect myoglobin levels, oxidative stress, meat tenderness, fat oxidation, and protein oxidation. Ultimately, these factors influence the color, tenderness, and flavor of meat. However, there is a dearth of comprehensive summaries addressing the effects of mitochondria on postmortem muscle physiology and meat quality. Therefore, this review aims to describe the characteristics of muscle mitochondria and their potential influence on muscle. Additionally, a suitable method for isolating mitochondria is presented. Lastly, the review emphasizes the regulation of oxygen consumption, energy metabolism, and apoptosis by postmortem muscle mitochondria, and provides an overview of relevant research and recent advancements. The ultimate objective of this review is to elucidate the underlying mechanisms through which mitochondria impact meat quality.
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Affiliation(s)
- Bo Zou
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China
| | - Fei Jia
- Department of Biological and Agricultural Engineering, University of Arkansas, Fayetteville, AR, USA
| | - Lin Ji
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China
| | - Xingmin Li
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China
| | - Ruitong Dai
- College of Food Science and Nutritional Engineering, China Agricultural University, Beijing, PR China
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Liu C, Gao X, Lou J, Li H, Chen Y, Chen M, Zhang Y, Hu Z, Chang X, Luo M, Zhai Y, Li C. Aberrant mechanical loading induces annulus fibrosus cells apoptosis in intervertebral disc degeneration via mechanosensitive ion channel Piezo1. Arthritis Res Ther 2023; 25:117. [PMID: 37420255 PMCID: PMC10327399 DOI: 10.1186/s13075-023-03093-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 06/16/2023] [Indexed: 07/09/2023] Open
Abstract
BACKGROUND Intervertebral disc degeneration (IVDD) is closely associated with the structural damage in the annulus fibrosus (AF). Aberrant mechanical loading is an important inducement of annulus fibrosus cells (AFCs) apoptosis, which contributes to the AF structural damage and aggravates IVDD, but the underlying mechanism is still unclear. This study aims to investigate the mechanism of a mechanosensitive ion channel protein Piezo1 in aberrant mechanical loading-induced AFCs apoptosis and IVDD. METHODS Rats were subjected to lumbar instability surgery to induce the unbalanced dynamic and static forces to establish the lumbar instability model. MRI and histological staining were used to evaluate the IVDD degree. A cyclic mechanical stretch (CMS)-stimulated AFCs apoptosis model was established by a Flexcell system in vitro. Tunel staining, mitochondrial membrane potential (MMP) detection, and flow cytometry were used to evaluate the apoptosis level. The activation of Piezo1 was detected using western blot and calcium fluorescent probes. Chemical activator Yoda1, chemical inhibitor GSMTx4, and a lentiviral shRNA-Piezo1 system (Lv-Piezo1) were utilized to regulate the function of Piezo1. High-throughput RNA sequencing (RNA-seq) was used to explore the mechanism of Piezo1-induced AFCs apoptosis. The Calpain activity and the activation of Calpain2/Bax/Caspase3 axis were evaluated by the Calpain activity kit and western blot with the siRNA-mediated Calapin1 or Calpain2 knockdown. Intradiscal administration of Lv-Piezo1 was utilized to evaluate the therapeutic effect of Piezo1 silencing in IVDD rats. RESULTS Lumbar instability surgery promoted the expression of Piezo1 in AFCs and stimulated IVDD in rats 4 weeks after surgery. CMS elicited distinct apoptosis of AFCs, with enhanced Piezo1 activation. Yoda1 further promoted CMS-induced apoptosis of AFCs, while GSMTx4 and Lv-Piezo1 exhibited opposite effects. RNA-seq showed that knocking down Piezo1 inhibited the calcium signaling pathway. CMS enhanced Calpain activity and elevated the expression of BAX and cleaved-Caspase3. Calpain2, but not Calpain1 knockdown, inhibited the expression of BAX and cleaved-Caspase3 and alleviated AFCs apoptosis. Lv-Piezo1 significantly alleviated the progress of IVDD in rats after lumbar instability surgery. CONCLUSIONS Aberrant mechanical loading induces AFCs apoptosis to promote IVDD by activating Piezo1 and downstream Calpain2/BAX/Caspase3 pathway. Piezo1 is expected to be a potential therapeutic target in treating IVDD.
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Affiliation(s)
- Chenhao Liu
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China
- Department of Orthopedics, Qinghai Provincial People's Hospital, Xining, 810007, Qinghai, China
| | - Xiaoxin Gao
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China
| | - Jinhui Lou
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China
| | - Haiyin Li
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China
| | - Yuxuan Chen
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China
- Center of Traumatic Orthopedics, People's Liberation Army 990 Hospital, Xinyang, 464000, Henan, China
| | - Molong Chen
- Department of Orthopedics/Sports Medicine Center, The First Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
| | - Yuyao Zhang
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China
| | - Zhilei Hu
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China
| | - Xian Chang
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China
| | - Menglin Luo
- Clinical Laboratory, Qinghai Provincial People's Hospital, Xining, 810007, Qinghai, China
| | - Yu Zhai
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China.
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China.
| | - Changqing Li
- Department of Orthopedics, The Second Affiliated Hospital of Army Medical University (The Third Military Medical University), Chongqing, 400038, China.
- State Key Laboratory of Trauma, Burns and Combined Injury, Chongqing, 400038, China.
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Hody S, Warren BE, Votion DM, Rogister B, Lemieux H. Eccentric Exercise Causes Specific Adjustment in Pyruvate Oxidation by Mitochondria. Med Sci Sports Exerc 2022; 54:1300-1308. [PMID: 35320143 DOI: 10.1249/mss.0000000000002920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
INTRODUCTION The impact of eccentric exercise on mitochondrial function has only been poorly investigated and remains unclear. This study aimed to identify the changes in skeletal muscle mitochondrial respiration, specifically triggered by a single bout of eccentric treadmill exercise. METHODS Male adult mice were randomly divided into eccentric (ECC; downhill running), concentric (CON; uphill running), and unexercised control groups ( n = 5/group). Running groups performed 18 bouts of 5 min at 20 cm·s -1 on an inclined treadmill (±15° to 20°). Mice were sacrificed 48 h after exercise for blood and quadriceps muscles collection. Deep proximal (red) and superficial distal (white) muscle portions were used for high-resolution respirometric measurements. RESULTS Plasma creatine kinase activity was significantly higher in the ECC compared with CON group, reflecting exercise-induced muscle damage ( P < 0.01). The ECC exercise induced a significant decrease in oxidative phosphorylation capacity in both quadriceps femoris parts ( P = 0.032 in proximal portion, P = 0.010 in distal portion) in comparison with the CON group. This observation was only made for the nicotinamide adenine dinucleotide (NADH) pathway using pyruvate + malate as substrates. When expressed as a flux control ratio, indicating a change related to mitochondrial quality rather than quantity, this change seemed more prominent in distal compared with proximal portion of quadriceps muscle. No significant difference between groups was found for the NADH pathway with glutamate or glutamate + malate as substrates, for the succinate pathway or for fatty acid oxidation. CONCLUSIONS Our data suggest that ECC exercise specifically affects pyruvate mitochondrial transport and/or oxidation 48 h after exercise, and this alteration mainly concerns the distal white muscle portion. This study provides new perspectives to improve our understanding of the mitochondrial adaptation associated with ECC exercise.
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Affiliation(s)
- Stéphanie Hody
- Department of Motricity Sciences, University of Liège, Liège, BELGIUM
| | - Blair E Warren
- Faculty Saint-Jean, University of Alberta, Edmonton, Alberta, CANADA
| | - Dominique-Marie Votion
- Equine Pole, Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, Liège, BELGIUM
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Kong L, Chen S, Zeng X, Zhao L, Chen Z. Calpain inhibitors inhibit mitochondrial calpain activity to ameliorate apoptosis of cocultured myoblast. CHINESE J PHYSIOL 2022; 65:226-232. [DOI: 10.4103/0304-4920.359797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Saadane A, Du Y, Thoreson WB, Miyagi M, Lessieur EM, Kiser J, Wen X, Berkowitz BA, Kern TS. Photoreceptor Cell Calcium Dysregulation and Calpain Activation Promote Pathogenic Photoreceptor Oxidative Stress and Inflammation in Prodromal Diabetic Retinopathy. THE AMERICAN JOURNAL OF PATHOLOGY 2021; 191:1805-1821. [PMID: 34214506 PMCID: PMC8579242 DOI: 10.1016/j.ajpath.2021.06.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 05/20/2021] [Accepted: 06/15/2021] [Indexed: 12/13/2022]
Abstract
This study tested the hypothesis that diabetes promotes a greater than normal cytosolic calcium level in rod cells that activates a Ca2+-sensitive protease, calpain, resulting in oxidative stress and inflammation, two pathogenic factors of early diabetic retinopathy. Nondiabetic and 2-month diabetic C57Bl/6J and calpain1 knockout (Capn1-/-) mice were studied; subgroups were treated with a calpain inhibitor (CI). Ca2+ content was measured in photoreceptors using Fura-2. Retinal calpain expression was studied by quantitative RT-PCR and immunohistochemistry. Superoxide and expression of inflammatory proteins were measured using published methods. Proteomic analysis was conducted on photoreceptors isolated from untreated diabetic mice or treated daily with CI for 2 months. Cytosolic Ca2+ content was increased twofold in photoreceptors of diabetic mice as compared with nondiabetic mice. Capn1 expression increased fivefold in photoreceptor outer segments of diabetic mice. Pharmacologic inhibition or genetic deletion of Capn1 significantly suppressed diabetes-induced oxidative stress and expression of proinflammatory proteins in retina. Proteomics identified a protein (WW domain-containing oxidoreductase [WWOX]) whose expression was significantly increased in photoreceptors from mice diabetic for 2 months and was inhibited with CI. Knockdown of Wwox using specific siRNA in vitro inhibited increase in superoxide caused by the high glucose. These results suggest that reducing Ca2+ accumulation, suppressing calpain activation, and/or reducing Wwox up-regulation are novel targets for treating early diabetic retinopathy.
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Affiliation(s)
- Aicha Saadane
- Department of Ophthalmology, University of California, Irvine, Irvine, California.
| | - Yunpeng Du
- Department of Ophthalmology, University of California, Irvine, Irvine, California
| | - Wallace B Thoreson
- Department of Ophthalmology and Visual Sciences, University of Nebraska Medical Center, Omaha, Nebraska; Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, Nebraska
| | - Masaru Miyagi
- Department of Pharmacology, Case Western Reserve University, Cleveland, Ohio
| | - Emma M Lessieur
- Department of Ophthalmology, University of California, Irvine, Irvine, California
| | - Jianying Kiser
- Department of Ophthalmology, University of California, Irvine, Irvine, California
| | - Xiangyi Wen
- Department of Ophthalmology and Visual Sciences, University of Nebraska Medical Center, Omaha, Nebraska
| | - Bruce A Berkowitz
- Department of Ophthalmology, Visual and Anatomical Sciences, Wayne State University School of Medicine, Detroit, Michigan
| | - Timothy S Kern
- Department of Ophthalmology, University of California, Irvine, Irvine, California; Veterans Administration Medical Center Research Service, Long Beach, California
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Samantaray S, Knaryan VH, M Del Re A, Woodward JJ, Shields DC, Azuma M, Inoue J, Ray SK, Banik NL. Cell-Permeable Calpain Inhibitor SJA6017 Provides Functional Protection to Spinal Motoneurons Exposed to MPP . Neurotox Res 2020; 38:640-649. [PMID: 32761446 DOI: 10.1007/s12640-020-00264-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 07/17/2020] [Accepted: 07/27/2020] [Indexed: 12/30/2022]
Abstract
Extra-nigral central nervous system sites have been found to be affected in Parkinson's disease (PD). In addition to substantia nigra, degeneration of spinal cord motor neurons may play a role in the motor symptoms of PD. To this end, hybrid rodent VSC 4.1 cells differentiated into motoneurons were used as a cell culture model following exposure to Parkinsonian neurotoxicant MPP+. SJA6017, a cell-permeable calpain inhibitor, was tested for its neuroprotective efficacy against the neurotoxicant. SJA6017 attenuated MPP+-induced rise in intracellular free Ca2+ and concomitant increases in the active form of calpain. It also significantly prevented increased levels of proteases and their activities, as shown by reduced levels of 145 kDa calpain-specific and 120 kDa caspase-3-specific spectrin breakdown products. Exposure to MPP+ elevated the levels of reactive oxygen species in VSC 4.1 motoneurons; this was significantly diminished with SJA6017. The motor proteins in spinal motoneurons, i.e., dynein and kinesin, were also impaired following exposure to MPP+ through calpain-mediated mechanisms; this process was partially ameliorated by SJA6017 pretreatment. Cytoprotection provided by SJA6017 against MPP+-induced damage to VSC 4.1 motoneurons was confirmed by restoration of membrane potential via whole-cell patch-clamp assay. This study demonstrates that calpain inhibition is a prospective route for neuroprotection in experimental PD; moreover, calpain inhibitor SJA6017 appears to be an effective neuroprotective agent against MPP+-induced damage in spinal motoneurons.
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Affiliation(s)
- Supriti Samantaray
- Department of Neurosurgery, Medical University of South Carolina, 96 Jonathan Lucas St., MSC606 Suite 301, Charleston, SC, 29425, USA
| | - Varduhi H Knaryan
- Department of Neurosurgery, Medical University of South Carolina, 96 Jonathan Lucas St., MSC606 Suite 301, Charleston, SC, 29425, USA
| | - Angelo M Del Re
- Division of Neuroscience Research and Center for Drug & Alcohol Programs, Medical University of South Carolina, Charleston, SC, USA
| | - John J Woodward
- Division of Neuroscience Research and Center for Drug & Alcohol Programs, Medical University of South Carolina, Charleston, SC, USA
| | - Donald C Shields
- Department of Neurosurgery, Medical University of South Carolina, 96 Jonathan Lucas St., MSC606 Suite 301, Charleston, SC, 29425, USA
| | - Mitsuyoshi Azuma
- Kobe Creative Center, Senju Pharmaceutical Corporation Limited, Kobe, 651-2241, Japan.,Department of Integrative Biosciences, Oregon Health & Science University, Portland, OR, USA
| | - Jun Inoue
- Kobe Creative Center, Senju Pharmaceutical Corporation Limited, Kobe, 651-2241, Japan
| | - Swapan K Ray
- Department of Pathology, Microbiology & Immunology, University of South Carolina School of Medicine, Columbia, SC, USA
| | - Naren L Banik
- Department of Neurosurgery, Medical University of South Carolina, 96 Jonathan Lucas St., MSC606 Suite 301, Charleston, SC, 29425, USA.
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Morales PE, Arias-Durán C, Ávalos-Guajardo Y, Aedo G, Verdejo HE, Parra V, Lavandero S. Emerging role of mitophagy in cardiovascular physiology and pathology. Mol Aspects Med 2019; 71:100822. [PMID: 31587811 DOI: 10.1016/j.mam.2019.09.006] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 09/23/2019] [Indexed: 01/02/2023]
Abstract
Healthy mitochondrial function is imperative for most tissues, but especially those with a high energy demand. Robust evidence linking mitochondrial dysfunction with cardiovascular disease has demonstrated that mitochondrial activity is highly relevant to cardiac muscle performance. Mitochondrial homeostasis is maintained through coordination among the processes that comprise the so-called mitochondrial dynamics machinery. The most-studied elements of cardiac mitochondrial dynamics are mitochondrial fission and fusion, biogenesis and degradation. Selective autophagic removal of mitochondria (mitophagy) is essential for clearing away defective mitochondria but can lead to cell damage and death if not tightly controlled. In cardiovascular cells such as cardiomyocytes and cardiac fibroblasts, mitophagy is involved in metabolic activity, cell differentiation, apoptosis and other physiological processes related to major phenotypic changes. Modulation of mitophagy has detrimental and/or beneficial outcomes in various cardiovascular diseases, suggesting that a deeper understanding of the mechanisms underlying mitochondrial degradation in the heart could provide valuable clinical insights. Here, we discuss current evidence supporting the role of mitophagy in cardiac pathophysiology, with an emphasis on different research models and their interpretations; basic concepts related to this selective autophagy; and the most commonly used experimental approaches for studying this mechanism. Finally, we provide a comprehensive literature analysis on the role of mitophagy in heart failure, ischemia/reperfusion, diabetic cardiomyopathy and other cardiovascular diseases, as well as its potential biomedical applications.
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Affiliation(s)
- Pablo E Morales
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical and Pharmaceutical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Carla Arias-Durán
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical and Pharmaceutical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile; Autophagy Research Center, Universidad de Chile, Santiago, Chile
| | - Yáreni Ávalos-Guajardo
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical and Pharmaceutical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Geraldine Aedo
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical and Pharmaceutical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile
| | - Hugo E Verdejo
- Advanced Center for Chronic Diseases (ACCDiS), División de Enfermedades Cardiovasculares, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Valentina Parra
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical and Pharmaceutical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile; Autophagy Research Center, Universidad de Chile, Santiago, Chile; Network for the Study of High-lethality Cardiopulmonary Diseases (REECPAL), Universidad de Chile, Santiago, Chile.
| | - Sergio Lavandero
- Advanced Center for Chronic Diseases (ACCDiS), Faculty of Chemical and Pharmaceutical Sciences and Faculty of Medicine, Universidad de Chile, Santiago, Chile; Corporación Centro de Estudios Científicos de las Enfermedades Crónicas (CECEC), Santiago, Chile; Department of Internal Medicine (Cardiology), University of Texas Southwestern Medical Center, Dallas, TX, USA.
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11
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Nevzorova TA, Mordakhanova ER, Daminova AG, Ponomareva AA, Andrianova IA, Le Minh G, Rauova L, Litvinov RI, Weisel JW. Platelet factor 4-containing immune complexes induce platelet activation followed by calpain-dependent platelet death. Cell Death Discov 2019; 5:106. [PMID: 31263574 PMCID: PMC6591288 DOI: 10.1038/s41420-019-0188-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 05/29/2019] [Accepted: 06/05/2019] [Indexed: 01/23/2023] Open
Abstract
Heparin-induced thrombocytopenia (HIT) is a complication of heparin therapy sometimes associated with thrombosis. The hallmark of HIT is antibodies to the heparin/platelet factor 4 (PF4) complex that cause thrombocytopenia and thrombosis through platelet activation. Despite the clinical importance, the molecular mechanisms and late consequences of immune platelet activation are not fully understood. Here, we studied immediate and delayed effects of the complexes formed by human PF4 and HIT-like monoclonal mouse anti-human-PF4/heparin IgG antibodies (named KKO) on isolated human platelets in vitro. Direct platelet-activating effect of the KKO/PF4 complexes was corroborated by the overexpression of phosphatidylserine (PS) and P-selectin on the platelet surface. The immune platelet activation was accompanied by a decrease of the mitochondrial transmembrane potential (ΔΨm), concurrent with a significant gradual reduction of the ATP content in platelets, indicating disruption of energy metabolism. A combination of PS expression and mitochondrial depolarization induced by the PF4-containing immune complexes observed in a substantial fraction of platelets was considered as a sign of ongoing platelet death, as opposed to a subpopulation of activated live platelets with PS on the plasma membrane but normal ΔΨm. Both activated and dying platelets treated with KKO/PF4 formed procoagulant extracellular microvesicles bearing PS on their surface. Scanning and transmission electron microscopy revealed dramatic morphological changes of KKO/PF4-treated platelets, including their fragmentation, another indicator of cell death. Most of the effects of KKO/PF4 were prevented by an anti-FcγRII monoclonal antibody IV.3. The adverse functional and structural changes in platelets induced by the KKO/PF4 complexes were associated with strong time-dependent activation of calpain, but only trace cleavage of caspase 3. The results indicate that the pathogenic PF4-containing HIT-like immune complexes induce direct prothrombotic platelet activation via FcγRIIA receptors followed by non-apoptotic calpain-dependent death of platelets, which can be an important mechanism of thrombocytopenia during HIT development.
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Affiliation(s)
- Tatiana A. Nevzorova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Russian Federation 420008 Russia
| | - Elmira R. Mordakhanova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Russian Federation 420008 Russia
| | - Amina G. Daminova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Russian Federation 420008 Russia
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky str., Kazan, Russian Federation 420111 Russia
| | - Anastasia A. Ponomareva
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Russian Federation 420008 Russia
- Kazan Institute of Biochemistry and Biophysics, FRC Kazan Scientific Center of RAS, 2/31 Lobachevsky str., Kazan, Russian Federation 420111 Russia
| | - Izabella A. Andrianova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Russian Federation 420008 Russia
| | - Giang Le Minh
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Russian Federation 420008 Russia
| | - Lubica Rauova
- Children’s Hospital of Philadelphia, 3401 Civic Center Blvd, Philadelphia, PA 19104 USA
- Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, 3401 Civic Center Blvd, Philadelphia, PA 19104 USA
| | - Rustem I. Litvinov
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Russian Federation 420008 Russia
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, 421 Curie Boulevard, Philadelphia, PA 19104 USA
| | - John W. Weisel
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 18 Kremlyovskaya St., Kazan, Russian Federation 420008 Russia
- Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, 421 Curie Boulevard, Philadelphia, PA 19104 USA
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12
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Cao T, Fan S, Zheng D, Wang G, Yu Y, Chen R, Song LS, Fan GC, Zhang Z, Peng T. Increased calpain-1 in mitochondria induces dilated heart failure in mice: role of mitochondrial superoxide anion. Basic Res Cardiol 2019; 114:17. [PMID: 30874894 DOI: 10.1007/s00395-019-0726-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 03/11/2019] [Indexed: 12/17/2022]
Abstract
We and others have reported that calpain-1 was increased in myocardial mitochondria from various animal models of heart disease. This study investigated whether constitutive up-regulation of calpain-1 restricted to mitochondria induced myocardial injury and heart failure and, if so, whether these phenotypes could be rescued by selective inhibition of mitochondrial superoxide production. Transgenic mice with human CAPN1 up-regulation restricted to mitochondria in cardiomyocytes (Tg-mtCapn1/tTA) were generated and characterized with low and high over-expression of transgenic human CAPN1 restricted to mitochondria, respectively. Transgenic up-regulation of mitochondria-targeted CAPN1 dose-dependently induced cardiac cell death, adverse myocardial remodeling, heart failure, and early death in mice, the changes of which were associated with mitochondrial dysfunction and mitochondrial superoxide generation. Importantly, a daily injection of mitochondria-targeted superoxide dismutase mimetics mito-TEMPO for 1 month starting from age 2 months attenuated cardiac cell death, adverse myocardial remodeling and heart failure, and reduced mortality in Tg-mtCapn1/tTA mice. In contrast, administration of TEMPO did not achieve similar cardiac protection in transgenic mice. Furthermore, transgenic up-regulation of mitochondria-targeted CAPN1 induced a reduction of ATP5A1 protein and ATP synthase activity in hearts. In cultured cardiomyocytes, increased calpain-1 in mitochondria promoted mitochondrial permeability transition pore (mPTP) opening and induced cell death, which were prevented by over-expression of ATP5A1, mito-TEMPO or cyclosporin A, an inhibitor of mPTP opening. In conclusion, this study has provided direct evidence demonstrating that increased mitochondrial calpain-1 is an important mechanism contributing to myocardial injury and heart failure by disrupting ATP synthase, and promoting mitochondrial superoxide generation and mPTP opening.
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Affiliation(s)
- Ting Cao
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Shuai Fan
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
| | - Dong Zheng
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China
- Critical Illness Research, Lawson Health Research Institute, London Health Sciences Centre, VRL 6th Floor, A6-140, 800 Commissioners Road, London, ON, N6A 4S2, Canada
- Department of Medicine, University of Western Ontario, London, ON, N6A 4S2, Canada
- Department of Pathology and Laboratory Medicine, University of Western Ontario, London, ON, N6A 4S2, Canada
| | - Grace Wang
- Faculty of Medicine, University of Toronto, Toronto, ON, M5S 1A8, Canada
| | - Yong Yu
- Shanghai Institute of Cardiovascular Diseases, Shanghai Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Ruizhen Chen
- Shanghai Institute of Cardiovascular Diseases, Shanghai Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Long-Sheng Song
- Division of Cardiovascular Medicine, Department of Internal Medicine, François M. Abboud Cardiovascular Research Center, University of Iowa Carver College of Medicine, Iowa City, IA, 52242, USA
| | - Guo-Chang Fan
- Department of Pharmacology and Systems Physiology, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA
| | - Zhuxu Zhang
- Department of Medicine, University of Western Ontario, London, ON, N6A 4S2, Canada
- Department of Pathology and Laboratory Medicine, University of Western Ontario, London, ON, N6A 4S2, Canada
| | - Tianqing Peng
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, 215123, China.
- Critical Illness Research, Lawson Health Research Institute, London Health Sciences Centre, VRL 6th Floor, A6-140, 800 Commissioners Road, London, ON, N6A 4S2, Canada.
- Department of Medicine, University of Western Ontario, London, ON, N6A 4S2, Canada.
- Department of Pathology and Laboratory Medicine, University of Western Ontario, London, ON, N6A 4S2, Canada.
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13
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Randriamboavonjy V, Kyselova A, Fleming I. Redox Regulation of Calpains: Consequences on Vascular Function. Antioxid Redox Signal 2019; 30:1011-1026. [PMID: 30266074 DOI: 10.1089/ars.2018.7607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
SIGNIFICANCE Calpains (CAPNs) are a family of calcium-activated cysteine proteases. The ubiquitous isoforms CAPN1 and CAPN2 have been involved in the maintenance of vascular integrity, but uncontrolled CAPN activation plays a role in the pathogenesis of vascular diseases. Recent Advances: It is well accepted that chronic and acute overproduction of reactive oxygen species (ROS) is associated with the development of vascular diseases. There is increasing evidence that ROS can also affect the CAPN activity, suggesting CAPN as a potential link between oxidative stress and vascular disease. CRITICAL ISSUES The physiopathological relevance of ROS in regulating the CAPN activity is not fully understood but seems to involve direct effects on CAPNs, redox modifications of CAPN substrates, as well as indirect effect on CAPNs via changes in Ca2+ levels. Finally, CAPNs can also stimulate ROS production; however, data showing in which context ROS are the causes or the consequences of CAPN activation are missing. FUTURE DIRECTIONS Detailed characterization of the molecular mechanisms underlying the regulation of the different members of the CAPN system by specific ROS would help understanding the pathophysiological role of CAPN in the modulation of the vascular function. Moreover, given that CAPNs have been found in different cellular compartments such as mitochondria and nucleus as well as in the extracellular space, identification of new CAPN targets as well as their functional consequences would add new insights in the function of these enigmatic proteases.
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Affiliation(s)
- Voahanginirina Randriamboavonjy
- 1 Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University, Frankfurt am Main, Germany.,2 German Center of Cardiovascular Research (DZHK), Partner Site Rhein-Main, Frankfurt am Main, Germany
| | - Anastasia Kyselova
- 1 Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University, Frankfurt am Main, Germany.,2 German Center of Cardiovascular Research (DZHK), Partner Site Rhein-Main, Frankfurt am Main, Germany
| | - Ingrid Fleming
- 1 Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University, Frankfurt am Main, Germany.,2 German Center of Cardiovascular Research (DZHK), Partner Site Rhein-Main, Frankfurt am Main, Germany
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14
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Wang H, Cheung F, Stoll AC, Rockwell P, Figueiredo-Pereira ME. Mitochondrial and calcium perturbations in rat CNS neurons induce calpain-cleavage of Parkin: Phosphatase inhibition stabilizes pSer 65Parkin reducing its calpain-cleavage. Biochim Biophys Acta Mol Basis Dis 2019; 1865:1436-1450. [PMID: 30796971 DOI: 10.1016/j.bbadis.2019.02.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 02/04/2019] [Accepted: 02/18/2019] [Indexed: 02/07/2023]
Abstract
Mitochondrial impairment and calcium (Ca++) dyshomeostasis are associated with Parkinson's disease (PD). When intracellular ATP levels are lowered, Ca++-ATPase pumps are impaired causing cytoplasmic Ca++ to be elevated and calpain activation. Little is known about the effect of calpain activation on Parkin integrity. To address this gap, we examined the effects of mitochondrial inhibitors [oligomycin (Oligo), antimycin and rotenone] on endogenous Parkin integrity in rat midbrain and cerebral cortical cultures. All drugs induced calpain-cleavage of Parkin to ~36.9/43.6 kDa fragments. In contrast, treatment with the proinflammatory prostaglandin J2 (PGJ2) and the proteasome inhibitor epoxomicin induced caspase-cleavage of Parkin to fragments of a different size, previously shown by others to be triggered by apoptosis. Calpain-cleaved Parkin was enriched in neuronal mitochondrial fractions. Pre-treatment with the phosphatase inhibitor okadaic acid prior to Oligo-treatment, stabilized full-length Parkin phosphorylated at Ser65, and reduced calpain-cleavage of Parkin. Treatment with the Ca++ ionophore A23187, which facilitates Ca++ transport across the plasma membrane, mimicked the effect of Oligo by inducing calpain-cleavage of Parkin. Removing extracellular Ca++ from the media prevented oligomycin- and ionophore-induced calpain-cleavage of Parkin. Computational analysis predicted that calpain-cleavage of Parkin liberates its UbL domain. The phosphagen cyclocreatine moderately mitigated Parkin cleavage by calpain. Moreover, the pituitary adenylate cyclase activating peptide (PACAP27), which stimulates cAMP production, prevented caspase but not calpain-cleavage of Parkin. Overall, our data support a link between Parkin phosphorylation and its cleavage by calpain. This mechanism reflects the impact of mitochondrial impairment and Ca++-dyshomeostasis on Parkin integrity and could influence PD pathogenesis.
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Affiliation(s)
- Hu Wang
- Department of Biological Sciences, Hunter College and Graduate Center, City University of New York, NY 10065, USA
| | - Fanny Cheung
- Department of Biological Sciences, Hunter College and Graduate Center, City University of New York, NY 10065, USA
| | - Anna C Stoll
- Department of Biological Sciences, Hunter College and Graduate Center, City University of New York, NY 10065, USA
| | - Patricia Rockwell
- Department of Biological Sciences, Hunter College and Graduate Center, City University of New York, NY 10065, USA
| | - Maria E Figueiredo-Pereira
- Department of Biological Sciences, Hunter College and Graduate Center, City University of New York, NY 10065, USA.
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15
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Pahima H, Reina S, Tadmor N, Dadon-Klein D, Shteinfer-Kuzmine A, Mazure NM, De Pinto V, Shoshan-Barmatz V. Hypoxic-induced truncation of voltage-dependent anion channel 1 is mediated by both asparagine endopeptidase and calpain 1 activities. Oncotarget 2018; 9:12825-12841. [PMID: 29560113 PMCID: PMC5849177 DOI: 10.18632/oncotarget.24377] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 01/25/2018] [Indexed: 01/04/2023] Open
Abstract
The voltage-dependent anion channel 1 (VDAC1), an outer mitochondria membrane (OMM)
protein, serves as a mitochondrial gatekeeper, mediating the transport of
nucleotides, Ca2+ and other metabolites across the OMM. VDAC1 also
plays a central role in mitochondria-mediated apoptosis by facilitating the release
of apoptotic proteins and by association with both pro- and anti-apoptotic proteins.
Tumor cells, which are constantly exposed to hypoxic conditions, affect the cell via
the transcription factor hypoxia-inducible factor (HIF) that induces transcriptional
activity. In cultured cells and in lung cancer patients, hypoxia induces VDAC1
truncation at the C-terminus (VDAC1-ΔC). However, the molecular mechanisms
involved in VDAC1-ΔC formation are unknown. Here, we show that hypoxia-induced
VDAC1-ΔC formation is inhibited by the Ca2+ chelator
BAPTA-AM, by calpain inhibitor-1, by inhibitor of the asparagine endopeptidase (AEP)
and by si-RNA targeting HIF1-α or Ca2+-activated protease
calpain-1 expression but not that of calpain-2. Finally, VDAC1-ΔC expressed in
bacteria and reconstituted into a planar lipid bilayer exhibited decreased channel
conductance relative to the full-length protein, yet retained voltage-dependent
conductance. These findings suggest that hypoxia, acting via HIF-1α
expression, leads to VDAC1 cleavage involving the activation of calpain 1 and
AEP.
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Affiliation(s)
- Hadas Pahima
- Department of Life Sciences and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Simona Reina
- Department of Biomedicine and Biotechnology, University of Catania and National Institute for Biomembranes and Biosystems, Section of Catania, Catania 95125, Italy.,Department of Biological, Geological and Environmental Sciences, University of Catania, Catania 95125, Italy
| | - Noa Tadmor
- Department of Life Sciences and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Daniella Dadon-Klein
- Department of Life Sciences and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Anna Shteinfer-Kuzmine
- Department of Life Sciences and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
| | - Nathalie M Mazure
- Institute for Research on Cancer and Aging of Nice, University of Nice Sophia-Antipolis, Centre Antoine Lacassagne, Nice 06189, France.,Present address: INSERM U1065, C3M, Nice 06204, France
| | - Vito De Pinto
- Department of Biomedicine and Biotechnology, University of Catania and National Institute for Biomembranes and Biosystems, Section of Catania, Catania 95125, Italy
| | - Varda Shoshan-Barmatz
- Department of Life Sciences and the National Institute for Biotechnology in the Negev, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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16
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Cheung LTY, Manthey AL, Lai JSM, Chiu K. Targeted Delivery of Mitochondrial Calcium Channel Regulators: The Future of Glaucoma Treatment? Front Neurosci 2017; 11:648. [PMID: 29213227 PMCID: PMC5702640 DOI: 10.3389/fnins.2017.00648] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 11/07/2017] [Indexed: 11/18/2022] Open
Affiliation(s)
- Leanne T Y Cheung
- Department of Ophthalmology, University of Hong Kong, Hong Kong, China
| | - Abby L Manthey
- Department of Ophthalmology, University of Hong Kong, Hong Kong, China
| | - Jimmy S M Lai
- Department of Ophthalmology, University of Hong Kong, Hong Kong, China
| | - Kin Chiu
- Department of Ophthalmology, University of Hong Kong, Hong Kong, China
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17
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Zhao H, Xu M, Chu G. Association between myocardial cell apoptosis and calpain-1/caspase-3 expression in rats with hypoxic-ischemic brain damage. Mol Med Rep 2017; 15:2727-2731. [PMID: 28447745 DOI: 10.3892/mmr.2017.6341] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 12/29/2016] [Indexed: 11/06/2022] Open
Abstract
The present study aimed to investigate the association between myocardial cell apoptosis and calpain-1/caspase-3 expression in a rat model of hypoxic-ischemic brain damage (HIBD). A total of 64 newborn rats were divided into control (n=8; sacrificed on day 7) and HIBD groups (n=56). HIBD group rats were sacrificed 2, 12 or 24 h, or 2, 3, 5 or 7 days following HIBD (n=8/group). A terminal deoxynucleotidyl transferase dUTP nick-end labeling assay was performed to detect myocardial apoptotic cells and calculate the apoptosis index (AI), reverse transcription-polymerase chain reaction was performed to detect myocardial calpain-1/caspase-3 mRNA expression levels and a western blot analysis was conducted to detect calpain‑1 protein expression levels. The correlations between calpain‑1 and caspase‑3 expression levels and AI were analyzed. The results demonstrated that apoptotic myocardial cells in the HIBD groups were markedly increased compared with the control group, with AI peaking in the day 3 group. Caspase‑3 and calpain‑1 mRNA expression levels were increased from 2 and 12 h following HIBD, respectively, with the most elevated levels in the day 2 group. Compared with the control group, calpain‑1 protein expression levels were increased from 2 h, with the greatest expression levels in the day 3 group (P<0.05). Calpain‑1 mRNA and protein (76/80 kDa) expression levels demonstrated positive linear correlations with AI (r=0.786, P=0.001; and r=0.853, P=0.001, respectively) Caspase-3 mRNA expression levels were positively correlated with AI (r=0.894; P=0.001). In conclusion, the present study demonstrated that in rats with HIBD, there is a positive correlation between increased apoptosis of myocardial cells and expression levels of calpain-1 and caspase-3.
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Affiliation(s)
- Hong Zhao
- Department of Pediatrics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Mei Xu
- Department of Pediatrics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Guilan Chu
- Department of Pediatrics, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
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18
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Sogut I, Uysal O, Oglakci A, Yucel F, Kartkaya K, Kanbak G. Prenatal alcohol-induced neuroapoptosis in rat brain cerebral cortex: protective effect of folic acid and betaine. Childs Nerv Syst 2017; 33:407-417. [PMID: 28062893 DOI: 10.1007/s00381-016-3309-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 11/29/2016] [Indexed: 10/20/2022]
Abstract
PURPOSE Alcohol consumption in pregnancy may cause fetal alcohol syndrome (FAS) in the infant. This study aims to investigate prenatal alcohol exposure related neuroapoptosis on the cerebral cortex tissues of newborn rats and possible neuroprotective effects of betaine, folic acid, and combined therapy. METHODS Pregnant rats were divided into five experimental groups: control, ethanol, ethanol + betaine, ethanol + folic acid, and ethanol + betaine + folic acid combined therapy groups. We measured cytochrome c release, caspase-3, calpain and cathepsin B and L. enzyme activities. In order to observe apoptotic cells in the early stages, TUNEL method was chosen together with histologic methods such as assessing the diameters of the apoptotic cells, their distribution in unit volume and volume proportion of cortical intact neuron nuclei. RESULTS Calpain, caspase-3 activities, and cytochrome c levels were significantly increased in alcohol group while cathepsin B and L. activities were also found to be elevated albeit not statistically significant. These increases were significantly reversed by folic acid and betaine + folic acid treatments. While ethanol increased the number of apoptotic cells, this increase was prevented in ethanol + betaine and ethanol + betaine + folic acid groups. Morphometric examination showed that the mean diameter of apoptotic cells was increased with ethanol administration while this increase was reduced by betaine and betaine + folic acid treatments. CONCLUSION We observed that ethanol is capable of triggering apoptotic cell death in the newborn rat brains. Furthermore, folic acid, betaine, and combined therapy of these supplements may reduce neuroapoptosis related to prenatal alcohol consumption, and might be effective on preventing fetal alcohol syndrome in infants.
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Affiliation(s)
- Ibrahim Sogut
- Vocational School of Health Services, Istanbul Bilim University, Yazarlar Sok. No:17, 34394, Istanbul, Turkey.
| | - Onur Uysal
- Vocational School of Health Services, Eskisehir Osmangazi University, 26480, Eskisehir, Turkey
| | - Aysegul Oglakci
- Medical School, Department of Biochemistry, Eskisehir Osmangazi University, 26480, Eskisehir, Turkey
| | - Ferruh Yucel
- Medical School, Department of Anatomy, Eskisehir Osmangazi University, 26480, Eskisehir, Turkey
| | - Kazim Kartkaya
- Medical School, Department of Biochemistry, Eskisehir Osmangazi University, 26480, Eskisehir, Turkey
| | - Gungor Kanbak
- Medical School, Department of Biochemistry, Eskisehir Osmangazi University, 26480, Eskisehir, Turkey
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19
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Hurst S, Hoek J, Sheu SS. Mitochondrial Ca 2+ and regulation of the permeability transition pore. J Bioenerg Biomembr 2017; 49:27-47. [PMID: 27497945 PMCID: PMC5393273 DOI: 10.1007/s10863-016-9672-x] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 07/31/2016] [Indexed: 02/06/2023]
Abstract
The mitochondrial permeability transition pore was originally described in the 1970's as a Ca2+ activated pore and has since been attributed to the pathogenesis of many diseases. Here we evaluate how each of the current models of the pore complex fit to what is known about how Ca2+ regulates the pore, and any insight that provides into the molecular identity of the pore complex. We also discuss the central role of Ca2+ in modulating the pore's open probability by directly regulating processes, such as ATP/ADP balance through the tricarboxylic acid cycle, electron transport chain, and mitochondrial membrane potential. We review how Ca2+ influences second messengers such as reactive oxygen/nitrogen species production and polyphosphate formation. We discuss the evidence for how Ca2+ regulates post-translational modification of cyclophilin D including phosphorylation by glycogen synthase kinase 3 beta, deacetylation by sirtuins, and oxidation/ nitrosylation of key residues. Lastly we introduce a novel view into how Ca2+ activated proteolysis through calpains in the mitochondria may be a driver of sustained pore opening during pathologies such as ischemia reperfusion injury.
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Affiliation(s)
- Stephen Hurst
- Center for Translational Medicine, Department of Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, 1020 Locust Street, Suite 543D, Philadelphia, PA, 19107, USA
| | - Jan Hoek
- Mitocare Center for Mitochondria Research, Department of Pathology Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, PA, 19107, USA
| | - Shey-Shing Sheu
- Center for Translational Medicine, Department of Medicine, Sidney Kimmel Medical College, Thomas Jefferson University, 1020 Locust Street, Suite 543D, Philadelphia, PA, 19107, USA.
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20
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Mitochondria in Structural and Functional Cardiac Remodeling. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 982:277-306. [PMID: 28551793 DOI: 10.1007/978-3-319-55330-6_15] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The heart must function continuously as it is responsible for both supplying oxygen and nutrients throughout the entire body, as well as for the transport of waste products to excretory organs. When facing either a physiological or pathological increase in cardiac demand, the heart undergoes structural and functional remodeling as a means of adapting to increased workload. These adaptive responses can include changes in gene expression, protein composition, and structure of sub-cellular organelles involved in energy production and metabolism. Mitochondria are essential for cardiac function, as they supply the ATP necessary to support continuous cycles of contraction and relaxation. In addition, mitochondria carry out other important processes, including synthesis of essential cellular components, calcium buffering, and initiation of cell death signals. Not surprisingly, mitochondrial dysfunction has been linked to several cardiovascular disorders, including hypertension, cardiac hypertrophy, ischemia/reperfusion and heart failure. The present chapter will discuss how changes in mitochondrial cristae structure, fusion/fission dynamics, fatty acid oxidation, ATP production, and the generation of reactive oxygen species might impact cardiac structure and function, particularly in the context of pathological hypertrophy and fibrotic response. In addition, the mechanistic role of mitochondria in autophagy and programmed cell death of cardiomyocytes will be addressed. Here we will also review strategies to improve mitochondrial function and discuss their cardioprotective potential.
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21
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Gurlo T, Costes S, Hoang JD, Rivera JF, Butler AE, Butler PC. β Cell-specific increased expression of calpastatin prevents diabetes induced by islet amyloid polypeptide toxicity. JCI Insight 2016; 1:e89590. [PMID: 27812546 DOI: 10.1172/jci.insight.89590] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The islet in type 2 diabetes (T2D) shares many features of the brain in protein misfolding diseases. There is a deficit of β cells with islet amyloid derived from islet amyloid polypeptide (IAPP), a protein coexpressed with insulin. Small intracellular membrane-permeant oligomers, the most toxic form of IAPP, are more frequent in β cells of patients with T2D and rodents expressing human IAPP. β Cells in T2D, and affected cells in neurodegenerative diseases, share a comparable pattern of molecular pathology, including endoplasmic reticulum stress, mitochondrial dysfunction, attenuation of autophagy, and calpain hyperactivation. While this adverse functional cascade in response to toxic oligomers is well described, the sequence of events and how best to intervene is unknown. We hypothesized that calpain hyperactivation is a proximal event and tested this in vivo by β cell-specific suppression of calpain hyperactivation with calpastatin overexpression in human IAPP transgenic mice. β Cell-specific calpastatin overexpression was remarkably protective against β cell dysfunction and loss and diabetes onset. The critical autophagy/lysosomal pathway for β cell viability was protected with calpain suppression, consistent with findings in models of neurodegenerative diseases. We conclude that suppression of calpain hyperactivation is a potentially beneficial disease-modifying strategy for protein misfolding diseases, including T2D.
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Yin G, Zeng Q, Zhao H, Wu P, Cai S, Deng L, Jiang W. Effect and mechanism of calpains on pediatric lobar pneumonia. Bioengineered 2016; 8:374-382. [PMID: 27786573 PMCID: PMC5553339 DOI: 10.1080/21655979.2016.1234544] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Lobar pneumonia, one of the community-acquired pneumonia (CAP), is a common pediatric low respiratory tract infection. Calpains are Ca2+-activated cysteine proteases whose activation mechanism is elusive. The present study was undertaken to detect the role and mechanism of calpains in pediatric lobar pneumonia. The human acute lung infection model (ALIM) was constructed and infected by Streptococcus. Enzyme-linked immunosorbent assay (ELISA) was used to measure interleukin (IL)-6, IL-8 and tumor necrosis factor (TNF)-α. We observed the lactate dehydrogenase (LDH) release, calpains activity and calpain inhibitor effects in ALIM. The expression of proliferating cell nuclear antigen (PCNA) protein was quantified by western blotting. Then the effects of calpain 1 and 2 knockdown on expressions of inflammation factors and PCNA protein, LDH release and apoptosis were evaluated in lung MRC-5 cells. In constructed ALIM, expressions of IL-6 (P < 0.01), IL-8 (P < 0.01), TNF-α (P < 0.05) and PCNA protein (P < 0.05) were significantly reduced by the calpain inhibitor. Expressions of IL-6, IL-8, TNF-α, PCNA protein and relative LDH release were statistically reduced by the small interfering (si) RNA-calpain 1 and 2 in MRC-5 cells (P < 0.05). Calpains silence increased apoptotic cells from 5% (negative control) to more than 20% in MRC-5 cells. The present study suggests that calpains possess a significant effect on inflammations, cell proliferation and apoptosis. Suppression of calpains may provide a potential therapeutic target of lobar pneumonia.
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Affiliation(s)
- Genquan Yin
- a Chronic Airways Disease Laboratory, Department of Respiratory and Critical Care Medicine , Nanfang Hospital, Southern Medical University , Guangzhou , Guangdong Province , China.,b Guangzhou Women and Children's Medical Center , Guangzhou Medical University , Guangzhou , Guangdong Province , China
| | - Qiang Zeng
- b Guangzhou Women and Children's Medical Center , Guangzhou Medical University , Guangzhou , Guangdong Province , China
| | - Haijin Zhao
- a Chronic Airways Disease Laboratory, Department of Respiratory and Critical Care Medicine , Nanfang Hospital, Southern Medical University , Guangzhou , Guangdong Province , China
| | - Peiqiong Wu
- b Guangzhou Women and Children's Medical Center , Guangzhou Medical University , Guangzhou , Guangdong Province , China
| | - Shaoxi Cai
- a Chronic Airways Disease Laboratory, Department of Respiratory and Critical Care Medicine , Nanfang Hospital, Southern Medical University , Guangzhou , Guangdong Province , China
| | - Li Deng
- b Guangzhou Women and Children's Medical Center , Guangzhou Medical University , Guangzhou , Guangdong Province , China
| | - Wenhui Jiang
- b Guangzhou Women and Children's Medical Center , Guangzhou Medical University , Guangzhou , Guangdong Province , China
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Ni R, Zheng D, Xiong S, Hill DJ, Sun T, Gardiner RB, Fan GC, Lu Y, Abel ED, Greer PA, Peng T. Mitochondrial Calpain-1 Disrupts ATP Synthase and Induces Superoxide Generation in Type 1 Diabetic Hearts: A Novel Mechanism Contributing to Diabetic Cardiomyopathy. Diabetes 2016; 65:255-68. [PMID: 26470784 PMCID: PMC4686953 DOI: 10.2337/db15-0963] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Accepted: 10/07/2015] [Indexed: 02/05/2023]
Abstract
Calpain plays a critical role in cardiomyopathic changes in type 1 diabetes (T1D). This study investigated how calpain regulates mitochondrial reactive oxygen species (ROS) generation in the development of diabetic cardiomyopathy. T1D was induced in transgenic mice overexpressing calpastatin, in mice with cardiomyocyte-specific capn4 deletion, or in their wild-type littermates by injection of streptozotocin. Calpain-1 protein and activity in mitochondria were elevated in diabetic mouse hearts. The increased mitochondrial calpain-1 was associated with an increase in mitochondrial ROS generation and oxidative damage and a reduction in ATP synthase-α (ATP5A1) protein and ATP synthase activity. Genetic inhibition of calpain or upregulation of ATP5A1 increased ATP5A1 and ATP synthase activity, prevented mitochondrial ROS generation and oxidative damage, and reduced cardiomyopathic changes in diabetic mice. High glucose concentration induced ATP synthase disruption, mitochondrial superoxide generation, and cell death in cardiomyocytes, all of which were prevented by overexpression of mitochondria-targeted calpastatin or ATP5A1. Moreover, upregulation of calpain-1 specifically in mitochondria induced the cleavage of ATP5A1, superoxide generation, and apoptosis in cardiomyocytes. In summary, calpain-1 accumulation in mitochondria disrupts ATP synthase and induces ROS generation, which promotes diabetic cardiomyopathy. These findings suggest a novel mechanism for and may have significant implications in diabetic cardiac complications.
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Affiliation(s)
- Rui Ni
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China Department of Medicine, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada Department of Pathology, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada
| | - Dong Zheng
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China Department of Medicine, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada Department of Pathology, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada
| | - Sidong Xiong
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China
| | - David J Hill
- Department of Medicine, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada
| | - Tao Sun
- Department of Medicine, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada
| | - Richard B Gardiner
- Department of Biology, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada
| | - Guo-Chang Fan
- Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, Cincinnati, OH
| | - Yanrong Lu
- Key Laboratory of Transplant Engineering and Immunology, Ministry of Health, Regenerative Medicine Research Center, West China Hospital, Sichuan University, Chengdu, China
| | - E Dale Abel
- Division of Endocrinology and Metabolism, Fraternal Order of Eagles Diabetes Research Center, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA
| | - Peter A Greer
- Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, and Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada
| | - Tianqing Peng
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu Province, China Department of Medicine, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada Department of Pathology, Lawson Health Research Institute, University of Western Ontario, London, Ontario, Canada
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Chen Q, Lesnefsky EJ. Heart mitochondria and calpain 1: Location, function, and targets. Biochim Biophys Acta Mol Basis Dis 2015; 1852:2372-8. [PMID: 26259540 DOI: 10.1016/j.bbadis.2015.08.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/17/2015] [Accepted: 08/06/2015] [Indexed: 12/22/2022]
Abstract
Calpain 1 is an ubiquitous Ca(2+)-dependent cysteine protease. Although calpain 1 has been found in cardiac mitochondria, the exact location within mitochondrial compartments and its function remain unclear. The aim of the current review is to discuss the localization of calpain 1 in different mitochondrial compartments in relationship to its function, especially in pathophysiological conditions. Briefly, mitochondrial calpain 1 (mit-CPN1) is located within the intermembrane space and mitochondrial matrix. Activation of the mit-CPN1 within intermembrane space cleaves apoptosis inducing factor (AIF), whereas the activated mit-CPN1 within matrix cleaves complex I subunits and metabolic enzymes. Inhibition of the mit-CPN1 could be a potential strategy to decrease cardiac injury during ischemia-reperfusion.
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Affiliation(s)
- Qun Chen
- Department of Medicine (Division of Cardiology, Pauley Heart Center), Virginia Commonwealth University, Richmond, VA 23298, United States.
| | - Edward J Lesnefsky
- Department of Medicine (Division of Cardiology, Pauley Heart Center), Virginia Commonwealth University, Richmond, VA 23298, United States; Department of Biochemistry, Virginia Commonwealth University, Richmond, VA 23298, United States; Department of Physiology, Virginia Commonwealth University, Richmond, VA 23298, United States; McGuire VA Medical Center, Richmond, VA 23249, United States
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25
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Ni R, Zheng D, Wang Q, Yu Y, Chen R, Sun T, Wang W, Fan GC, Greer PA, Gardiner RB, Peng T. Deletion of capn4 Protects the Heart Against Endotoxemic Injury by Preventing ATP Synthase Disruption and Inhibiting Mitochondrial Superoxide Generation. Circ Heart Fail 2015; 8:988-96. [PMID: 26246018 DOI: 10.1161/circheartfailure.115.002383] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2015] [Accepted: 08/05/2015] [Indexed: 12/16/2022]
Abstract
BACKGROUND Our recent study has demonstrated that inhibition of calpain by transgenic overexpression of calpastatin reduces myocardial proinflammatory response and dysfunction in endotoxemia. However, the underlying mechanisms remain to be determined. In this study, we used cardiomyocyte-specific capn4 knockout mice to investigate whether and how calpain disrupts ATP synthase and induces mitochondrial superoxide generation during endotoxemia. METHODS AND RESULTS Cardiomyocyte-specific capn4 knockout mice and their wild-type littermates were injected with lipopolysaccharides. Four hours later, calpain-1 protein and activity were increased in mitochondria of endotoxemic mouse hearts. Mitochondrial calpain-1 colocalized with and cleaved ATP synthase-α (ATP5A1), leading to ATP synthase disruption and a concomitant increase in mitochondrial reactive oxygen species generation during lipopolysaccharide stimulation. Deletion of capn4 or upregulation of ATP5A1 increased ATP synthase activity, prevented mitochondrial reactive oxygen species generation, and reduced proinflammatory response and myocardial dysfunction in endotoxemic mice. In cultured cardiomyocytes, lipopolysaccharide induced mitochondrial superoxide generation that was prevented by overexpression of mitochondria-targeted calpastatin or ATP5A1. Upregulation of calpain-1 specifically in mitochondria sufficiently induced superoxide generation and proinflammatory response, both of which were attenuated by ATP5A1 overexpression or mitochondria-targeted superoxide dismutase mimetics. CONCLUSIONS Cardiomyocyte-specific capn4 knockout protects the heart against lipopolysaccharide-induced injury in endotoxemic mice. Lipopolysaccharides induce calpain-1 accumulation in mitochondria. Mitochondrial calpain-1 disrupts ATP synthase, leading to mitochondrial reactive oxygen species generation, which promotes proinflammatory response and myocardial dysfunction during endotoxemia. These findings uncover a novel mechanism by which calpain mediates myocardial dysfunction in sepsis.
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Affiliation(s)
- Rui Ni
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Dong Zheng
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Qiang Wang
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Yong Yu
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Ruizhen Chen
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Tao Sun
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Wang Wang
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Guo-Chang Fan
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Peter A Greer
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Richard B Gardiner
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.)
| | - Tianqing Peng
- From the Jiangsu Key Laboratory of Infection and Immunity, Institutes of Biology and Medical Sciences, Soochow University, Suzhou, Jiangsu, China (R.N., D.Z., T.P.); Lawson Health Research Institute, Departments of Medicine (R.N., D.Z., T.S., T.P.), Pathology (R.N., D.Z., T.P.) and Biology (R.B.G.), University of Western Ontario, London, Ontario, Canada; Department of Dermatology (Q.W.) and Institute of Cardiovascular Diseases (Y.Y., R.C.), Zhongshan Hospital, Fudan University, Shanghai, China; Mitochondria and Metabolism Center, Departments of Anesthesiology and Pain Medicine, University of Washington, Seattle (W.W.); Department of Pharmacology and Cell Biophysics, University of Cincinnati College of Medicine, OH (G.-C.F.); and Division of Cancer Biology and Genetics, Queen's University Cancer Research Institute, Department of Pathology and Molecular Medicine, Queen's University, Kingston, Ontario, Canada (P.A.G.).
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Jurič DM, Finderle Ž, Šuput D, Brvar M. The effectiveness of oxygen therapy in carbon monoxide poisoning is pressure- and time-dependent: a study on cultured astrocytes. Toxicol Lett 2015; 233:16-23. [PMID: 25562542 DOI: 10.1016/j.toxlet.2015.01.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 12/22/2014] [Accepted: 01/02/2015] [Indexed: 12/30/2022]
Abstract
Carbon monoxide (CO) poisoning causes neuronal and glial apoptosis that can result in delayed neurological symptoms. The damage of brain cells can be prevented by oxygen therapy. Based on the central role of astrocytes in maintaining neuronal function and viability we investigated the toxic effects of 3000ppm CO in air followed by 24h of normoxia and evaluated the possible protective influence of 100% normobaric oxygen or 100% oxygen at a pressure of 3bar (hyperbaric) against CO poisoning in these cells. CO/normoxia caused a progressive decline of viability, increase in reactive oxygen species and decline of mitochondrial membrane potential and intracellular ATP levels in cultured rat astrocytes. Increased caspase-9, caspase-8 and calpain activity converged in activation of caspase-3/7. 1h treatment with oxygen disclosed pressure- and time-dependent efficacy in restoring astrocytic mitochondrial function and the prevention of apoptosis. The protective effect was most evident when the astrocytes were exposed to hyperbaric oxygen, but not normobaric oxygen, 1-5h after exposure to CO.
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Affiliation(s)
- Damijana M Jurič
- Institute of Pharmacology and Experimental Toxicology, Faculty of Medicine, University of Ljubljana, Korytkova 2, Ljubljana, Slovenia.
| | - Žarko Finderle
- Institute of Physiology, Faculty of Medicine, University of Ljubljana, Zaloška cesta 4, Ljubljana, Slovenia.
| | - Dušan Šuput
- Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Zaloška cesta 4, Ljubljana, Slovenia.
| | - Miran Brvar
- Institute of Pathophysiology, Faculty of Medicine, University of Ljubljana, Zaloška cesta 4, Ljubljana, Slovenia; Poison Control Centre, Division of Internal Medicine, University Medical Centre Ljubljana, Zaloška cesta 7, Ljubljana, Slovenia.
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27
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Moretti D, Del Bello B, Allavena G, Maellaro E. Calpains and cancer: Friends or enemies? Arch Biochem Biophys 2014; 564:26-36. [DOI: 10.1016/j.abb.2014.09.018] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 09/23/2014] [Accepted: 09/30/2014] [Indexed: 02/07/2023]
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Garwood C, Faizullabhoy A, Wharton SB, Ince PG, Heath PR, Shaw PJ, Baxter L, Gelsthorpe C, Forster G, Matthews FE, Brayne C, Simpson JE. Calcium dysregulation in relation to Alzheimer-type pathology in the ageing brain. Neuropathol Appl Neurobiol 2014; 39:788-99. [PMID: 23421725 DOI: 10.1111/nan.12033] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2012] [Accepted: 01/23/2013] [Indexed: 01/14/2023]
Abstract
AIMS Calcium dyshomeostasis is implicated in the pathogenesis of several neurodegenerative disorders including Alzheimer's disease. However, much of the previous research has focused on changes in neuronal calcium signalling. In a recent microarray study we identified dysregulation of several key signalling pathways including the Ca(2+) signalling pathway in astrocytes as Alzheimer-type pathology developed. In this study we sought to determine the expression of calpain-10 and calcium/calmodulin-dependent kinase alpha (CamKIIα) in relation to Alzheimer-type pathology in a population-based study. METHODS Using post mortem temporal cortex samples derived from the Medical Research Council Cognitive Function and Ageing Study (MRC-CFAS) ageing brain cohort we examined calpain-10 and CamKIIα gene and protein expression using quantitative polymerase chain reaction and immunohistochemistry. RESULTS We demonstrate that astrocytic expression of calpain-10 is up-regulated, and CamKIIα down-regulated with increasing Braak stage. Using immunohistochemistry we confirm protein expression of calpain-10 in astrocytes throughout the temporal cortex and demonstrate that calpain-10 immunoreactivity is correlated with both local and global measures of Alzheimer-type pathology. In addition, we identify a subpopulation of calpain-10 immunoreactive interlaminar astrocytes that extend processes deep into the cortex. CamKIIα is predominantly neuronal in localization and is associated with the presence of diffuse plaques in the ageing brain. DISCUSSION Dysregulated expression of key calcium signalling molecules occurs with progression of Alzheimer-type pathology in the ageing brain, highlighting the need for further functional studies of astrocytic calcium signalling with respect to disease progression.
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Affiliation(s)
- C Garwood
- Sheffield Institute for Translational Neuroscience, Department of Neuroscience, University of Sheffield, Sheffield, UK
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Wu H, Che X, Zheng Q, Wu A, Pan K, Shao A, Wu Q, Zhang J, Hong Y. Caspases: a molecular switch node in the crosstalk between autophagy and apoptosis. Int J Biol Sci 2014; 10:1072-83. [PMID: 25285039 PMCID: PMC4183927 DOI: 10.7150/ijbs.9719] [Citation(s) in RCA: 192] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Accepted: 08/20/2014] [Indexed: 12/16/2022] Open
Abstract
Autophagy and apoptosis are two important catabolic processes contributing to the maintenance of cellular and tissue homeostasis. Autophagy controls the turnover of protein aggregates and damaged organelles within cells, while apoptosis is the principal mechanism by which unwanted cells are dismantled and eliminated from organisms. Despite marked differences between these two pathways, they are highly interconnected in determining the fate of cells. Intriguingly, caspases, the primary drivers of apoptotic cell death, play a critical role in mediating the complex crosstalk between autophagy and apoptosis. Pro-apoptotic signals can converge to activate caspases to execute apoptotic cell death. In addition, activated caspases can degrade autophagy proteins (i.e., Beclin-1, Atg5, and Atg7) to shut down the autophagic response. Moreover, caspases can convert pro-autophagic proteins into pro-apoptotic proteints to trigger apoptotic cell death instead. It is clear that caspases are important in both apoptosis and autophagy, thus a detailed deciphering of the role of caspases in these two processes is still required to clarify the functional relationship between them. In this article, we provide a current overview of caspases in its interplay between autophagy and apoptosis. We emphasized that defining the role of caspases in autophagy-apoptosis crosstalk will provide a framework for more precise manipulation of these two processes during cell death.
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Affiliation(s)
- Haijian Wu
- 1. Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Xiaoru Che
- 2. Department of Cardiology, Zhejiang Provincial People's Hospital, Hangzhou, China
| | - Qiaoli Zheng
- 3. Clinical Research Center, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - An Wu
- 1. Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Kun Pan
- 4. Department of Neurological Surgery, Weill Cornell Medical College, New York, New York, USA
| | - Anwen Shao
- 1. Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Qun Wu
- 1. Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jianmin Zhang
- 1. Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Yuan Hong
- 1. Department of Neurosurgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Neuhof C, Neuhof H. Calpain system and its involvement in myocardial ischemia and reperfusion injury. World J Cardiol 2014; 6:638-652. [PMID: 25068024 PMCID: PMC4110612 DOI: 10.4330/wjc.v6.i7.638] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 01/26/2014] [Accepted: 05/29/2014] [Indexed: 02/06/2023] Open
Abstract
Calpains are ubiquitous non-lysosomal Ca2+-dependent cysteine proteases also present in myocardial cytosol and mitochondria. Numerous experimental studies reveal an essential role of the calpain system in myocardial injury during ischemia, reperfusion and postischemic structural remodelling. The increasing Ca2+-content and Ca2+-overload in myocardial cytosol and mitochondria during ischemia and reperfusion causes an activation of calpains. Upon activation they are able to injure the contractile apparatus and impair the energy production by cleaving structural and functional proteins of myocytes and mitochondria. Besides their causal involvement in acute myocardial dysfunction they are also involved in structural remodelling after myocardial infarction by the generation and release of proapoptotic factors from mitochondria. Calpain inhibition can prevent or attenuate myocardial injury during ischemia, reperfusion, and in later stages of myocardial infarction.
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Protective effect of calpain inhibitor N-acetyl-l-leucyl-l-leucyl-l-norleucinal on acute alcohol consumption related cardiomyopathy. Mol Biol Rep 2014; 41:6743-53. [DOI: 10.1007/s11033-014-3560-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Accepted: 06/20/2014] [Indexed: 10/25/2022]
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Differential functions of calpain 1 during epithelial cell death and adipocyte differentiation in mammary gland involution. Biochem J 2014; 459:355-68. [PMID: 24467364 DOI: 10.1042/bj20130847] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Calpains become activated in the mammary gland early during weaning, cleaving several proteins located mainly in the cell membrane, but also in other organelles such as lysosomes, mitochondria and nuclei. By immunofluorescence and Western blot analysis, we have demonstrated the nuclear translocation of calpain-1 and calpain-2, together with the cleavage of several cytoplasmic nucleoporins in epithelial cells of the lobulo-alveolar compartment. In vivo and in vitro calpain inhibition prevented this nucleoporin degradation. In addition, calpain-1 was also present in the nucleus of non-epithelial mammary tissue cells, concomitant with adipocyte re-differentiation. Calpain-1 was internalized within nuclei and found to be present in the nuclear chromatin-enriched fraction, associated with histone H3. Furthermore, we have demonstrated, both in vivo and in vitro, the cleavage of the N-terminal residue of histone H3 by calpain-1. Calpain-1 co-localized with both H3K4me3 (histone H3 trimethylated at Lys4) and H3K27me3 (histone H3 trimethylated at Lys27) at the nuclear periphery, a bivalent epigenetic signal essential for cell differentiation. Using ChIP assays we could confirm the presence of calpain-1 in the promoters of key genes expressed in adipose tissue, such as Cebpa (CCAAT/enhancer-binding protein α) and Lep (leptin). The results of the present study highlight a dual role for calpain-1 in the weaned gland after the pregnancy/lactation cycle, controlling programmed cell death and participating in the epigenetic programme during adipocyte differentiation.
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Bukowska A, Lendeckel U, Goette A. Atrial Calpains: Mediators of Atrialmyopathies in Atrial Fibrillation. J Atr Fibrillation 2014; 6:1021. [PMID: 27957058 DOI: 10.4022/jafib.1021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 02/21/2014] [Accepted: 03/04/2014] [Indexed: 01/24/2023]
Abstract
Atrial fibrillation (AF) is associated with substantial structural changes at cell and tissue level. Cellular hypertrophy, disintegration of sarcomeres, mitochondrial swelling and apoptosis have been described as typical histo-morphologic alterations in AF. Main initiators for cellular alterations in fibrillating atrial myocytes are cytosolic calcium overload and oxidative stress. Calpains are intracellular Ca2+- activated proteases and important mediators of calcium overload. Activation of calpains and down-regulation of the calpain inhibitor, calpastatin, contribute to myocardial damage in fibrillating atria. Thus, deregulations of the expression, activity, or subcellular localization of calpain within atrial myocytes have been established as important mediators of atrial myopathy during AF.
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Affiliation(s)
- Alicja Bukowska
- EUTRAF Working Group: Molecular Electrophysiology, University Hospital Magdeburg, Germany
| | - Uwe Lendeckel
- Institute of Medical Biochemistry and Molecular Biology, Ernst-Moritz-Arndt University,Greifswald, Germany
| | - Andreas Goette
- EUTRAF Working Group: Molecular Electrophysiology, University Hospital Magdeburg, Germany; Department of Cardiology and Intensive Care Medicine, St. Vincenz-Hospital, Paderborn,Germany
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Ma M. Role of calpains in the injury-induced dysfunction and degeneration of the mammalian axon. Neurobiol Dis 2013; 60:61-79. [PMID: 23969238 PMCID: PMC3882011 DOI: 10.1016/j.nbd.2013.08.010] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 07/17/2013] [Accepted: 08/08/2013] [Indexed: 12/21/2022] Open
Abstract
Axonal injury and degeneration, whether primary or secondary, contribute to the morbidity and mortality seen in many acquired and inherited central nervous system (CNS) and peripheral nervous system (PNS) disorders, such as traumatic brain injury, spinal cord injury, cerebral ischemia, neurodegenerative diseases, and peripheral neuropathies. The calpain family of proteases has been mechanistically linked to the dysfunction and degeneration of axons. While the direct mechanisms by which transection, mechanical strain, ischemia, or complement activation trigger intra-axonal calpain activity are likely different, the downstream effects of unregulated calpain activity may be similar in seemingly disparate diseases. In this review, a brief examination of axonal structure is followed by a focused overview of the calpain family. Finally, the mechanisms by which calpains may disrupt the axonal cytoskeleton, transport, and specialized domains (axon initial segment, nodes, and terminals) are discussed.
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Affiliation(s)
- Marek Ma
- Department of Emergency Medicine, University of Pennsylvania, Philadelphia, PA, USA; Center for Resuscitation Science, University of Pennsylvania, Philadelphia, PA, USA.
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Calpain-1 inhibitors for selective treatment of rheumatoid arthritis: what is the future? Future Med Chem 2013; 5:2057-74. [DOI: 10.4155/fmc.13.172] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Effective small-molecule treatment of inflammatory diseases remains an unmet need in medicine. Current treatments are either limited in effectiveness or invasive. The latest biologics prevent influx of inflammatory cells to damaged tissue. Calpain-1 is a calcium-activated cysteine protease that plays an important role in neutrophil motility. It is, therefore, a potential target for intervention in inflammatory disease. Many inhibitors of calpains have been developed but most are unselective and so unsuitable for drug use. However, recent series of α-mercaptoacrylate inhibitors target regulatory domains of calpain-1 and are much more specific. These compounds are effective in impairing the cell spreading mechanism of neutrophils in vitro and raise the possibility of treating rheumatoid arthritis with a pill; however, challenges still remain. Improved bioavailability is needed and solution of their precise mode of action should prompt the development of specific calpain-1 screens for novel classes of inhibitors.
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Husi H, Sanchez-Niño MD, Delles C, Mullen W, Vlahou A, Ortiz A, Mischak H. A combinatorial approach of Proteomics and Systems Biology in unravelling the mechanisms of acute kidney injury (AKI): involvement of NMDA receptor GRIN1 in murine AKI. BMC SYSTEMS BIOLOGY 2013; 7:110. [PMID: 24172336 PMCID: PMC3827826 DOI: 10.1186/1752-0509-7-110] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Accepted: 10/28/2013] [Indexed: 12/23/2022]
Abstract
BACKGROUND Acute kidney injury (AKI) is a frequent condition in hospitalised patients undergoing major surgery or the critically ill and is associated with increased mortality. Based on the volume of the published literature addressing this condition, reporting both supporting as well as conflicting molecular evidence, it is apparent that a comprehensive analysis strategy is required to understand and fully delineate molecular events and pathways which can be used to describe disease induction and progression as well as lead to a more targeted approach in intervention therapies. RESULTS We used a Systems Biology approach coupled with a de-novo high-resolution proteomic analysis of kidney cortex samples from a mouse model of folic acid-induced AKI (12 animals in total) and show comprehensive mapping of signalling cascades, gene activation events and metabolite interference by mapping high-resolution proteomic datasets onto a de-novo hypothesis-free dataspace. The findings support the involvement of the glutamatergic signalling system in AKI, induced by over-activation of the N-methyl-D-aspartate (NMDA)-receptor leading to apoptosis and necrosis by Ca2+-influx, calpain and caspase activation, and co-occurring reactive oxygen species (ROS) production to DNA fragmentation and NAD-rundown. The specific over-activation of the NMDA receptor may be triggered by the p53-induced protein kinase Dapk1, which is a known non-reversible cell death inducer in a neurological context. The pathway mapping is consistent with the involvement of the Renin-Angiotensin Aldosterone System (RAAS), corticoid and TNFα signalling, leading to ROS production and gene activation through NFκB, PPARγ, SMAD and HIF1α trans-activation, as well as p53 signalling cascade activation. Key elements of the RAAS-glutamatergic axis were assembled as a novel hypothetical pathway and validated by immunohistochemistry. CONCLUSIONS This study shows to our knowledge for the first time in a molecular signal transduction pathway map how AKI is induced, progresses through specific signalling cascades that may lead to end-effects such as apoptosis and necrosis by uncoupling of the NMDA receptor. Our results can potentially pave the way for a targeted pharmacological intervention in disease progression or induction.
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Affiliation(s)
- Holger Husi
- BHF Glasgow Cardiovascular Research Centre, University of Glasgow, 126 University Place, Glasgow G12 8TA,, UK.
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Cruzen SM, Paulino PVR, Lonergan SM, Huff-Lonergan E. Postmortem proteolysis in three muscles from growing and mature beef cattle. Meat Sci 2013; 96:854-61. [PMID: 24211543 DOI: 10.1016/j.meatsci.2013.09.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 08/09/2013] [Accepted: 09/23/2013] [Indexed: 10/26/2022]
Abstract
The objective of this study was to determine calpain system activity and postmortem protein degradation in three muscles from growing (n=6, 7.3 ± 0.5 months) and mature (n=6, 106.7 ± 43.1 months) beef cattle. The ratio of μ-calpain:total calpastatin activity tended to be lower in mature animals (P=0.08), suggesting reduced potential for proteolysis. Additionally, muscles from the mature group had greater calpastatin activity compared to calves at 6 days postmortem and had less μ-calpain autolysis and troponin-T and titin degradation during the aging period (P<0.01). Between the longissimus, semimembranosus, and triceps brachii muscles, the triceps brachii had the least postmortem proteolysis, with greater calpastatin activity and less troponin-T and titin degradation compared to other muscles (P<0.01). These data suggest that calpastatin activity in muscle from older animals is more persistent postmortem. This difference may contribute to the decreased protein degradation and increased toughness of beef from mature cattle, even after aging.
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Affiliation(s)
- Shannon M Cruzen
- Department of Animal Science, Iowa State University, Ames, IA 50011, USA.
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Ozaki T, Nakazawa M, Yamashita T, Tomita H, Ebina Y, Ishiguro SI. Decrease of ATP by mitochondrial m-calpain inhibitory peptide in the rat retinas. Cell Struct Funct 2013; 38:207-23. [PMID: 23965546 DOI: 10.1247/csf.13008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Activations of mitochondrial calpains cause apoptosis-inducing factor-dependent apoptosis of retinal photoreceptor cells in the Royal College of Surgeons (RCS) rat, an animal model of retinitis pigmentosa. In the present study, we attempted to develop specific inhibitors of mitochondrial calpains that would prevent the retinal degeneration. We examined the inhibitory potency of 20-mer peptides of the m-calpain for mitochondrial calpains activity, determined the inhibitory regions, and conjugated the cell-penetrating peptides (CPP). The cytotoxicity and delivery of the peptide was evaluated using mouse photoreceptor-derived 661W cells. After intravitreal injection of the peptide in RCS rats, we examined the peptide delivery to the retina, photoreceptor cell death numbers, responses of the electroretinogram (ERG), concentrations of intracellular ATP, and changes of retinal morphology. Results showed that one of the peptides inhibited the activity of the mitochondrial m-calpain. The HIV-1 tat-conjugated m-calpain peptide, HIV-Nm, could preserve the inhibitory potency of the mitochondrial m-calpain, and penetrate into the 661W cells. While intravitreal injection of HIV-Nm made it possible to deliver to the retina, it did not prevent photoreceptor cell death. Furthermore, it caused the ERG attenuation and the decrease in the intracellular ATP only a day after the injection. Although HIV-Nm did not cause histological change of the retina after 1 or 2 days of the administration, the morphological abnormality of the retina was observed after 3-14 days. Our results demonstrated that HIV-Nm failed to prevent the photoreceptor cell death, but rather caused the attenuation of ERG response and the decrease of ATP.
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Affiliation(s)
- Taku Ozaki
- Department of Biochemistry and Molecular Biology, Faculty of Agriculture and Life Science, Hirosaki University
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Chan D, Tsoi MYT, Liu CD, Chan SH, Law SYK, Chan KW, Chan YP, Gopalan V, Lam AKY, Tang JCO. Oncogene GAEC1 regulates CAPN10 expression which predicts survival in esophageal squamous cell carcinoma. World J Gastroenterol 2013; 19:2772-2780. [PMID: 23687414 PMCID: PMC3653151 DOI: 10.3748/wjg.v19.i18.2772] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2012] [Revised: 11/03/2012] [Accepted: 02/06/2013] [Indexed: 02/06/2023] Open
Abstract
AIM: To identify the downstream regulated genes of GAEC1 oncogene in esophageal squamous cell carcinoma and their clinicopathological significance.
METHODS: The anti-proliferative effect of knocking down the expression of GAEC1 oncogene was studied by using the RNA interference (RNAi) approach through transfecting the GAEC1-overexpressed esophageal carcinoma cell line KYSE150 with the pSilencer vector cloned with a GAEC1-targeted sequence, followed by MTS cell proliferation assay and cell cycle analysis using flow cytometry. RNA was then extracted from the parental, pSilencer-GAEC1-targeted sequence transfected and pSilencer negative control vector transfected KYSE150 cells for further analysis of different patterns in gene expression. Genes differentially expressed with suppressed GAEC1 expression were then determined using Human Genome U133 Plus 2.0 cDNA microarray analysis by comparing with the parental cells and normalized with the pSilencer negative control vector transfected cells. The most prominently regulated genes were then studied by immunohistochemical staining using tissue microarrays to determine their clinicopathological correlations in esophageal squamous cell carcinoma by statistical analyses.
RESULTS: The RNAi approach of knocking down gene expression showed the effective suppression of GAEC1 expression in esophageal squamous cell carcinoma cell line KYSE150 that resulted in the inhibition of cell proliferation and increase of apoptotic population. cDNA microarray analysis for identifying differentially expressed genes detected the greatest levels of downregulation of calpain 10 (CAPN10) and upregulation of trinucleotide repeat containing 6C (TNRC6C) transcripts when GAEC1 expression was suppressed. At the tissue level, the high level expression of calpain 10 protein was significantly associated with longer patient survival (month) of esophageal squamous cell carcinoma compared to the patients with low level of calpain 10 expression (37.73 ± 16.33 vs 12.62 ± 12.44, P = 0.032). No significant correction was observed among the TNRC6C protein expression level and the clinocopathologcial features of esophageal squamous cell carcinoma.
CONCLUSION: GAEC1 regulates the expression of CAPN10 and TNRC6C downstream. Calpain 10 expression is a potential prognostic marker in patients with esophageal squamous cell carcinoma.
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Abstract
It is believed that cardiac remodeling due to geometric and structural changes is a major mechanism for the progression of heart failure in different pathologies including hypertension, hypertrophic cardiomyopathy, dilated cardiomyopathy, diabetic cardiomyopathy, and myocardial infarction. Increases in the activities of proteolytic enzymes such as matrix metalloproteinases, calpains, cathepsins, and caspases contribute to the process of cardiac remodeling. In addition to modifying the extracellular matrix, both matrix metalloproteinases and cathepsins have been shown to affect the activities of subcellular organelles in cardiomyocytes. The activation of calpains and caspases has been identified to induce subcellular remodeling in failing hearts. Proteolytic activities associated with different proteins including caspases, calpain, and the ubiquitin-proteasome system have been shown to be involved in cardiomyocyte apoptosis, which is an integral part of cardiac remodeling. This article discusses and compares how the activities of various proteases are involved in different cardiac abnormalities with respect to alterations in apoptotic pathways, cardiac remodeling, and cardiac dysfunction. An imbalance appears to occur between the activities of some proteases and their endogenous inhibitors in various types of hypertrophied and failing hearts, and this is likely to further accentuate subcellular remodeling and cardiac dysfunction. The importance of inhibiting the activities of both extracellular and intracellular proteases specific to distinct etiologies, in attenuating cardiac remodeling and apoptosis as well as biochemical changes of subcellular organelles, in heart failure has been emphasized. It is suggested that combination therapy to inhibit different proteases may prove useful for the treatment of heart failure.
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Affiliation(s)
- Alison L Müller
- Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre, Winnipeg, MB, Canada
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Abstract
SIGNIFICANCE Lysosomes are acidic organelles containing more than fifty hydrolases that provide for the degradation of intracellular and endocytosed materials by autophagy and heterophagy, respectively. They digest a variety of macromolecules, as well as all organelles, and their integrity is crucial. As a result of the degradation of iron-containing macromolecules (e.g., ferritin and mitochondrial components) or endocytosed erythrocytes (by macrophages), lysosomes can accumulate large amounts of iron. This iron occurs often as Fe(II) due to the acidic and reducing lysosomal environment. Fe(II) is known to catalyze Fenton reactions, yielding extremely reactive hydroxyl radicals that may jeopardize lysosomal membrane integrity during oxidative stress. This results in the release of hydrolases and redox-active iron into the cytosol with ensuing damage or cell death. Lysosomes play key roles not only in apoptosis and necrosis but also in neurodegeneration, aging, and atherosclerosis. RECENT ADVANCES The damaging effect of intralysosomal iron can be hampered by endogenous or exogenous iron chelators that enter the lysosomal compartment by membrane permeation, endocytosis, or autophagy. CRITICAL ISSUES Cellular sensitivity to oxidative stress is enhanced by lysosomal redox-active iron or by lysosomal-targeted copper chelators binding copper (from degradation of copper-containing macromolecules) in redox-active complexes. Probably due to higher copper levels, lysosomes of malignant cells may be specifically sensitized by such chelators. FUTURE DIRECTIONS By increasing lysosomal redox-active iron or exposing cells to lysosomal-targeted copper chelators, it should be possible to enhance the sensitivity of cancer cells to radiation-induced oxidative stress or treatment with cytostatics that induce such stress.
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Affiliation(s)
- Alexei Terman
- Department of Clinical Pathology and Cytology, Karolinska University Hospital in Huddinge, Stockholm, Sweden
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Kouzoukas DE, Li G, Takapoo M, Moninger T, Bhalla RC, Pantazis NJ. Intracellular calcium plays a critical role in the alcohol-mediated death of cerebellar granule neurons. J Neurochem 2012; 124:323-35. [PMID: 23121601 DOI: 10.1111/jnc.12076] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 09/30/2012] [Accepted: 10/10/2012] [Indexed: 11/28/2022]
Abstract
Alcohol is a potent neuroteratogen that can trigger neuronal death in the developing brain. However, the mechanism underlying this alcohol-induced neuronal death is not fully understood. Utilizing primary cultures of cerebellar granule neurons (CGN), we tested the hypothesis that the alcohol-induced increase in intracellular calcium [Ca(2+)](i) causes the death of CGN. Alcohol induced a dose-dependent (200-800 mg/dL) neuronal death within 24 h. Ratiometric Ca(2+) imaging with Fura-2 revealed that alcohol causes a rapid (1-2 min), dose-dependent increase in [Ca(2+)](i), which persisted for the duration of the experiment (5 or 7 min). The alcohol-induced increase in [Ca(2+)](i) was observed in Ca(2+) -free media, suggesting intracellular Ca(2+) release. Pre-treatment of CGN cultures with an inhibitor (2-APB) of the inositol-triphosphate receptor (IP(3) R), which regulates Ca(2+) release from the endoplasmic reticulum (ER), blocked both the alcohol-induced rise in [Ca(2+)](i) and the neuronal death caused by alcohol. Similarly, pre-treatment with BAPTA/AM, a Ca(2+) -chelator, also inhibited the alcohol-induced surge in [Ca(2+) ](i) and prevented neuronal death. In conclusion, alcohol disrupts [Ca(2+)](i) homeostasis in CGN by releasing Ca(2+) from intracellular stores, resulting in a sustained increase in [Ca(2+)](i). This sustained increase in [Ca(2+)](i) may be a key determinant in the mechanism underlying alcohol-induced neuronal death.
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Affiliation(s)
- Dimitrios E Kouzoukas
- Department of Anatomy and Cell Biology, Carver College of Medicine, The University of Iowa, Iowa City, IA, USA
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Intravitreal injection or topical eye-drop application of a μ-calpain C2L domain peptide protects against photoreceptor cell death in Royal College of Surgeons' rats, a model of retinitis pigmentosa. Biochim Biophys Acta Mol Basis Dis 2012; 1822:1783-95. [DOI: 10.1016/j.bbadis.2012.07.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 07/25/2012] [Accepted: 07/30/2012] [Indexed: 11/20/2022]
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Inserte J, Hernando V, Garcia-Dorado D. Contribution of calpains to myocardial ischaemia/reperfusion injury. Cardiovasc Res 2012; 96:23-31. [PMID: 22787134 DOI: 10.1093/cvr/cvs232] [Citation(s) in RCA: 113] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Loss of calcium (Ca(2+)) homeostasis contributes through different mechanisms to cell death occurring during the first minutes of reperfusion. One of them is an unregulated activation of a variety of Ca(2+)-dependent enzymes, including the non-lysosomal cysteine proteases known as calpains. This review analyses the involvement of the calpain family in reperfusion-induced cardiomyocyte death. Calpains remain inactive before reperfusion due to the acidic pHi and increased ionic strength in the ischaemic myocardium. However, inappropriate calpain activation occurs during myocardial reperfusion, and subsequent proteolysis of a wide variety of proteins contributes to the development of contractile dysfunction and necrotic cell death by different mechanisms, including increased membrane fragility, further impairment of Na(+) and Ca(2+) handling, and mitochondrial dysfunction. Recent studies demonstrating that calpain inhibition contributes to the cardioprotective effects of preconditioning and postconditioning, and the beneficial effects obtained with new and more selective calpain inhibitors added at the onset of reperfusion, point to the potential cardioprotective value of therapeutic strategies designed to prevent calpain activation.
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Affiliation(s)
- Javier Inserte
- Laboratory of Experimental Cardiology, Department of Cardiology, Vall d'Hebron University Hospital and Research Institute, Universitat Autònoma de Barcelona, Barcelona, Spain.
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45
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Specific training improves skeletal muscle mitochondrial calcium homeostasis after eccentric exercise. Eur J Appl Physiol 2012; 113:427-36. [DOI: 10.1007/s00421-012-2446-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Accepted: 06/16/2012] [Indexed: 11/26/2022]
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Arnandis T, Ferrer-Vicens I, García-Trevijano ER, Miralles VJ, García C, Torres L, Viña JR, Zaragozá R. Calpains mediate epithelial-cell death during mammary gland involution: mitochondria and lysosomal destabilization. Cell Death Differ 2012; 19:1536-48. [PMID: 22555453 DOI: 10.1038/cdd.2012.46] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Our aim was to elucidate the physiological role of calpains (CAPN) in mammary gland involution. Both CAPN-1 and -2 were induced after weaning and its activity increased in isolated mitochondria and lysosomes. CAPN activation within the mitochondria could trigger the release of cytochrome c and other pro-apoptotic factors, whereas in lysosomes it might be essential for tissue remodeling by releasing cathepsins into the cytosol. Immunohistochemical analysis localized CAPNs mainly at the luminal side of alveoli. During weaning, CAPNs translocate to the lysosomes processing membrane proteins. To identify these substrates, lysosomal fractions were treated with recombinant CAPN and cleaved products were identified by 2D-DIGE. The subunit b(2) of the v-type H(+) ATPase is proteolyzed and so is the lysosomal-associated membrane protein 2a (LAMP2a). Both proteins are also cleaved in vivo. Furthermore, LAMP2a cleavage was confirmed in vitro by addition of CAPNs to isolated lysosomes and several CAPN inhibitors prevented it. Finally, in vivo inhibition of CAPN1 in 72-h-weaned mice decreased LAMP2a cleavage. Indeed, calpeptin-treated mice showed a substantial delay in tissue remodeling and involution of the mammary gland. These results suggest that CAPNs are responsible for mitochondrial and lysosomal membrane permeabilization, supporting the idea that lysosomal-mediated cell death is a new hallmark of mammary gland involution.
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Affiliation(s)
- T Arnandis
- Departamento de Bioquímica y Biología Molecular, Fundación Investigación Hospital Clínico-INCLIVA, Facultad de Medicina, Universidad de Valencia, Valencia, Spain
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Randriamboavonjy V, Fleming I. All cut up! The consequences of calpain activation on platelet function. Vascul Pharmacol 2012; 56:210-5. [DOI: 10.1016/j.vph.2012.02.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 01/15/2012] [Accepted: 02/16/2012] [Indexed: 11/29/2022]
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Melo FR, Grujic M, Spirkoski J, Calounova G, Pejler G. Serglycin proteoglycan promotes apoptotic versus necrotic cell death in mast cells. J Biol Chem 2012; 287:18142-52. [PMID: 22493512 DOI: 10.1074/jbc.m112.344796] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The mechanisms that govern whether a cell dies by apoptosis or necrosis are not fully understood. Here we show that serglycin, a secretory granule proteoglycan of hematopoietic cells, can have a major impact on this decision. Wild type and serglycin(-/-) mast cells were equally sensitive to a range of cell death-inducing regimens. However, whereas wild type mast cells underwent apoptotic cell death, serglycin(-/-) cells died predominantly by necrosis. Investigations of the underlying mechanism revealed that cell death was accompanied by leakage of secretory granule compounds into the cytosol and that the necrotic phenotype of serglycin(-/-) mast cells was linked to defective degradation of poly(ADP-ribose) polymerase-1. Cells lacking mouse mast cell protease 6, a major serglycin-associated protease, exhibited similar defects in apoptosis as observed in serglycin(-/-) cells, indicating that the pro-apoptotic function of serglycin is due to downstream effects of proteases that are complex-bound to serglycin. Together, these findings implicate serglycin in promoting apoptotic versus necrotic cell death.
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Affiliation(s)
- Fabio R Melo
- Department of Anatomy, Physiology, and Biochemistry, Swedish University of Agricultural Sciences, 75123 Uppsala, Sweden.
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Shell JR, Lawrence DS. Proteolytic regulation of the mitochondrial cAMP-dependent protein kinase. Biochemistry 2012; 51:2258-64. [PMID: 22385295 DOI: 10.1021/bi201573k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The mitochondrial cAMP-dependent protein kinase (PKA) is activatable in a cAMP-independent fashion. The regulatory (R) subunits of the PKA holoenzyme (R(2)C(2)), but not the catalytic (C) subunits, suffer proteolysis upon exposure of bovine heart mitochondria to digitonin, Ca(2+), and a myriad of electron transport inhibitors. Selective loss of both the RI- and RII-type subunits was demonstrated via Western blot analysis, and activation of the C subunit was revealed by phosphorylation of a validated PKA peptide substrate. Selective proteolysis transpires in a calpain-dependent fashion as demonstrated by exposure of the R and C subunits of PKA to calpain and by attenuation of R and C subunit proteolysis in the presence of calpain inhibitor I. By contrast, exposure of mitochondria to cAMP fails to promote R subunit degradation, although it does result in enhanced C subunit catalytic activity. Treatment of mitochondria with electron transport chain inhibitors rotenone, antimycin A, sodium azide, and oligomycin, as well as an uncoupler of oxidative phosphorylation, also elicits enhanced C subunit activity. These results are consistent with the notion that signals, originating from cAMP-independent sources, elicit enhanced mitochondrial PKA activity.
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Affiliation(s)
- Jennifer R Shell
- Departments of Chemistry, Chemical Biology and Medicinal Chemistry, and Pharmacology, University of North Carolina, Chapel Hill, North Carolina 27599, United States
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Vaish V, Sanyal SN. Role of Sulindac and Celecoxib in chemoprevention of colorectal cancer via intrinsic pathway of apoptosis: Exploring NHE-1, intracellular calcium homeostasis and Calpain 9. Biomed Pharmacother 2012; 66:116-30. [DOI: 10.1016/j.biopha.2011.11.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Accepted: 11/08/2011] [Indexed: 12/22/2022] Open
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