1
|
Ammar M, Yaich S, Hakim A, Ghozzi H, Sahnoun Z, Ben Hmida M, Zghal K, Ben Mahmoud L. Tacrolimus trough level and oxidative stress in Tunisian kidney transplanted patients. Ren Fail 2024; 46:2313863. [PMID: 38345031 PMCID: PMC10863538 DOI: 10.1080/0886022x.2024.2313863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 01/30/2024] [Indexed: 02/15/2024] Open
Abstract
BACKGROUND The effect of tacrolimus (TAC) on oxidative stress after kidney transplantation (KT) is unclear. This study aimed to evaluate the influence of TAC trough levels of oxidative stress status in Tunisian KT patients during the post-transplantation period (PTP). METHODS A prospective study including 90 KT patients was performed. TAC whole-blood concentrations were measured by the microparticle enzyme immunoassay method and adjusted according to the target range. Plasma levels of oxidants (malondialdehyde (MDA) and advanced oxidation protein products (AOPP)) and antioxidants (ascorbic acid, glutathione (GSH), glutathione peroxidase (GPx), and superoxide dismutase (SOD)) were measured using spectrophotometry. The subjects were subdivided according to PTP into three groups: patients with early, intermediate, and late PT. According to the TAC level, they were subdivided into LL-TAC, NL-TAC, and HL-TAC groups. RESULTS A decrease in MDA levels, SOD activity, and an increase in GSH levels and GPx activity were observed in patients with late PT compared to those with early and intermediate PT (p < 0.05). Patients with LL-TAC had lower MDA levels and higher GSH levels and GPx activity compared with the NL-TAC and HL-TAC groups (p < 0.05). CONCLUSION Our results have shown that in KT patients, despite the recovery of kidney function, the TAC reduced but did not normalize oxidative stress levels in long-term therapy, and the TAC effect significantly depends on the concentration used.
Collapse
Affiliation(s)
- Mariam Ammar
- Department of Pharmacology, Faculty of Medicine, University of Sfax, Sfax, Tunisia
- Laboratory of Research of Pharmacology and Toxicology, University of Sfax, Sfax, Tunisia
- Faculty of Sciences of Sfax, University of Sfax, Sfax, Tunisia
| | - Soumaya Yaich
- Department of Nephrology, Hedi Chaker University Hospital, University of Sfax, Sfax, Tunisia
- Laboratory of Research of Renal Pathology, University of Sfax, Sfax, Tunisia
| | - Ahmed Hakim
- Department of Pharmacology, Faculty of Medicine, University of Sfax, Sfax, Tunisia
- Laboratory of Research of Pharmacology and Toxicology, University of Sfax, Sfax, Tunisia
| | - Hanen Ghozzi
- Department of Pharmacology, Faculty of Medicine, University of Sfax, Sfax, Tunisia
- Laboratory of Research of Pharmacology and Toxicology, University of Sfax, Sfax, Tunisia
| | - Zouheir Sahnoun
- Department of Pharmacology, Faculty of Medicine, University of Sfax, Sfax, Tunisia
- Laboratory of Research of Pharmacology and Toxicology, University of Sfax, Sfax, Tunisia
| | - Mohamed Ben Hmida
- Department of Nephrology, Hedi Chaker University Hospital, University of Sfax, Sfax, Tunisia
- Laboratory of Research of Renal Pathology, University of Sfax, Sfax, Tunisia
| | - Khaled Zghal
- Department of Pharmacology, Faculty of Medicine, University of Sfax, Sfax, Tunisia
- Laboratory of Research of Pharmacology and Toxicology, University of Sfax, Sfax, Tunisia
| | - Lobna Ben Mahmoud
- Department of Pharmacology, Faculty of Medicine, University of Sfax, Sfax, Tunisia
- Laboratory of Research of Pharmacology and Toxicology, University of Sfax, Sfax, Tunisia
| |
Collapse
|
2
|
Hong JM, Munna AN, Moon JH, Seol JW, Park SY. Melatonin-mediated calcineurin inactivation attenuates amyloid beta-induced apoptosis. IBRO Neurosci Rep 2024; 16:336-344. [PMID: 38390232 PMCID: PMC10882114 DOI: 10.1016/j.ibneur.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 02/07/2024] [Accepted: 02/09/2024] [Indexed: 02/24/2024] Open
Abstract
Alzheimer's disease (AD) is the most common age-related progressive neurodegenerative disorder. The accumulation of amyloid beta-peptide is a neuropathological marker of AD. While melatonin is recognized to have protective effects on aging and neurodegenerative disorders, the therapeutic effect of melatonin on calcineurin in AD is poorly understood. In this study, we examined the effect and underlying molecular mechanisms of melatonin treatment on amyloid beta-mediated neurotoxicity in neuroblastoma cells. Melatonin treatment decreased calcineurin and autophagy in neuroblastoma cells. Electron microscopy images showed that melatonin inhibited amyloid beta-induced autophagic vacuoles. The increase in the amyloid beta-induced apoptosis rate was observed more in PrPC-expressing ZW cells than in PrPC-silencing Zpl cells. Taken together, the results suggest that by mitigating the effect of calcineurin and autophagy flux activation, melatonin could also rescue amyloid beta-induced neurotoxic effects. These findings may be relevant to therapy for neurodegenerative diseases, including AD.
Collapse
Affiliation(s)
- Jeong-Min Hong
- Biosafety Research Institute, College of Veterinary Medicine, Jeonbuk National University, Gobong ro, Iksan, Jeonbuk 54596, Republic of Korea
| | - Ali Newaz Munna
- Biosafety Research Institute, College of Veterinary Medicine, Jeonbuk National University, Gobong ro, Iksan, Jeonbuk 54596, Republic of Korea
| | - Ji-Hong Moon
- Biosafety Research Institute, College of Veterinary Medicine, Jeonbuk National University, Gobong ro, Iksan, Jeonbuk 54596, Republic of Korea
| | - Jae-Won Seol
- Biosafety Research Institute, College of Veterinary Medicine, Jeonbuk National University, Gobong ro, Iksan, Jeonbuk 54596, Republic of Korea
| | - Sang-Youel Park
- Biosafety Research Institute, College of Veterinary Medicine, Jeonbuk National University, Gobong ro, Iksan, Jeonbuk 54596, Republic of Korea
| |
Collapse
|
3
|
Zuo Y, Liu HT, Lin LB, Yue RZ, Liu HH, Wang HW, Wang L, Hou RL, Liu WZ, Li CZ, Wang JZ, Li P, Yin YL. A new metal ion chelator attenuates human tau accumulation-induced neurodegeneration and memory deficits in mice. Exp Neurol 2024; 373:114657. [PMID: 38141802 DOI: 10.1016/j.expneurol.2023.114657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 12/16/2023] [Indexed: 12/25/2023]
Abstract
Neuronal neurofibrillary tangles containing Tau hyperphosphorylation proteins are a typical pathological marker of Alzheimer's disease (AD). The level of tangles in neurons correlates positively with severe dementia. However, how Tau induces cognitive dysfunction is still unknown, which leads to a lack of effective treatments for AD. Metal ions deposition occurs with tangles in AD brain autopsy. Reduced metal ion can improve the pathology of AD. To explore whether abnormally phosphorylated Tau causes metal ion deposition, we overexpressed human full-length Tau (hTau) in the hippocampal CA3 area of mice and primary cultured hippocampal neurons (CPHN) and found that Tau accumulation induced iron deposition and activated calcineurin (CaN), which dephosphorylates glycogen synthase kinase 3 beta (GSK3β), mediating Tau hyperphosphorylation. Simultaneous activation of CaN dephosphorylates cyclic-AMP response binding protein (CREB), leading to synaptic deficits and memory impairment, as shown in our previous study; this seems to be a vicious cycle exacerbating tauopathy. In the current study, we developed a new metal ion chelator that displayed a significant inhibitory effect on Tau phosphorylation and memory impairment by chelating iron ions in vivo and in vitro. These findings provide new insight into the mechanism of memory impairment induced by Tau accumulation and develop a novel potential treatment for tauopathy in AD.
Collapse
Affiliation(s)
- Yue Zuo
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China; School of Basic Medical Sciences, Sanquan College of Xinxiang Medical University, Xinxiang 453003, China
| | - Hui-Ting Liu
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China
| | - Lai-Biao Lin
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China
| | - Rui-Zhu Yue
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China
| | - Huan-Huan Liu
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China; The Second Affiliated Hospital, Xinxiang Medical University, Xinxiang 453003, China
| | - Hong-Wei Wang
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China
| | - Lu Wang
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China
| | - Ruan-Ling Hou
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China
| | - Wei-Zhen Liu
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China
| | - Chang-Zheng Li
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China; School of Basic Medical Sciences, Sanquan College of Xinxiang Medical University, Xinxiang 453003, China
| | - Jian-Zhi Wang
- Department of Pathophysiology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Key Laboratory of Ministry of Education of China for Neurological Disorders, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Peng Li
- College of Pharmacy, Henan International Joint Laboratory of Cardiovascular Remodeling and Drug Intervention, Xinxiang Key Laboratory of Vascular Remodeling Intervention and Molecular Targeted Therapy Drug Development, Xinxiang Medical University, Xinxiang 453003, China; Hubei Key Laboratory of Diabetes and Angiopathy, Hubei University of Science and Technology, Xianning 437100, China.
| | - Ya-Ling Yin
- School of Basic Medical Sciences, Sino-UK Joint Laboratory of Brain Function and Injury, Henan International Key Laboratory for Non-invasive Neuromodulation, Department of Physiology and Pathology, Xinxiang Medical University, Xinxiang 453003, China
| |
Collapse
|
4
|
Zhang Q, Li Y, Bao Y, Yin C, Xin X, Guo Y, Gao F, Huo S, Wang X, Wang Q. Pretreatment with nimodipine reduces incidence of POCD by decreasing calcineurin mediated hippocampal neuroapoptosis in aged rats. BMC Anesthesiol 2018; 18:42. [PMID: 29661144 PMCID: PMC5902967 DOI: 10.1186/s12871-018-0501-0] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 03/29/2018] [Indexed: 12/31/2022] Open
Abstract
Background Calcineurin (CaN) having a high expression in hippocampal neurons is closely related to apoptosis. Pretreatment with nimodipine can lower the apoptosis rate of hippocampal neuron to reduce the incidence of postoperative cognitive dysfunction (POCD). However, the relationship between cerebral protective effect of pretreatment with nimodipine and CaN is controversial in the literature. The aim of this study is to evaluate the relationship between neuroprotective effect of nimodipine and CaN on POCD in aged rats. Methods Ninety-six 18-month-old male Sprague-Dawley rats were randomly assigned into 4 groups (n = 24 each): control group (Group C), nimodipine group (Group N), surgery group (Group S) and nimodipine + surgery group (Group N + S). In Group N and Group N + S, nimodipine 1 mg/kg was intraperitoneally injected, while the equal volume of normal saline was given instead in Group S. 30 min later, Group N and Group C inhaled pure oxygen for 2 h, and Group S and N + S inhaled 3% sevoflurane for 2 h when exploratory laparotomy was performed. Morris water maze test was performed on 1 day before operation and 1, 3 and 7 days after operation. After the end of Morris water maze test at 1 day before operation and 1 and 7 days after operation, 8 rats were sacrificed, brains were removed and hippocampal tissues were obtained for detection of apoptosis in hippocampal neurons, cytoplasmic calcium ([Ca2+]i), and hippocampal CaN and caspase-3 expression. Results Compared with the 1st day before operation, the escape latency, apoptosis rate, [Ca2+]i, expression of CaN and caspase-3 increased significantly, but the frequency of crossing the original platform decreased dramatically in Group S and N + S(P<0.05). In addition, the escape latency, apoptosis rate, [Ca2+]i, and expression of CaN and caspase-3 decreased markedly, but the frequency of crossing the original platform increased significantly in Group N + S as compared with Group S (P<0.05). Conclusions Pretreatment with nimodipine reduces the incidence of POCD by decreasing CaN mediated hippocampal neuroapoptosis in aged rats.
Collapse
Affiliation(s)
- Qi Zhang
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China
| | - Yanan Li
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China
| | - Yongjuan Bao
- Editorial Department of Chinese Journal of Anesthesiology, Hebei Provincial Institute of Medical Science Information, No. 050071, Western Heping Road, Shijiazhuang City, 050071, Hebei, China
| | - Chunping Yin
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China
| | - Xi Xin
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China
| | - Yangyang Guo
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China
| | - Fang Gao
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China
| | - Shuping Huo
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China
| | - Xiuli Wang
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China
| | - Qiujun Wang
- Department of Anesthesiology, the Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang City, 050051, Hebei, China.
| |
Collapse
|
5
|
Stefanova NA, Kolosova NG. Evolution of Alzheimer’s disease pathogenesis conception. ACTA ACUST UNITED AC 2016. [DOI: 10.3103/s0096392516010119] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
6
|
Ferjani H, Achour A, Bacha H, Abid S. Tacrolimus and mycophenolate mofetil associations. Hum Exp Toxicol 2015; 34:1119-32. [DOI: 10.1177/0960327115569812] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Gastrointestinal risk factors after organ transplantation are prevalent, due to the chronic use of immunosuppressant. The immunosuppressive drugs such as tacrolimus/mycophenolate mofetil (TAC/MMF) association are the most commonly used therapy. TAC and MMF have been implicated in gastrotoxicity, but their direct effects, alone and combined, on intestinal cells are not completely elucidated. This study investigated the effect of TAC and MMF alone and combined on human colon carcinoma cells. Our results demonstrated that TAC and MMF individually inhibit clearly cells proliferation, enhanced free radicals, lipid peroxidation production, induced DNA lesions and reduced mitochondrial membrane potential. In this study, we also showed that the two molecules TAC and MMF combined at high concentrations amplified the cell damage. Furthermore, the TAC (5 µM) prevented cell death induced by MMF (half maximal inhibitory concentration (IC50)). Also, MMF (50 µM) induced cytoprotection in HCT116 cells against TAC (IC50) toxicity. Our findings provide additional evidence that oxidative damage is the major contribution of TAC and MMF combined toxicities. In fact, MMF and TAC exert a gastroprotective effect by modulating reactive oxygen species production. These data underscore the pleiotropic effect of TAC and MMF on HCT116 cells that play a preventive and critical role on intestinal function.
Collapse
Affiliation(s)
- H Ferjani
- Laboratory of Research on Biologically Compatible Compounds, Faculty of Dentistry, Monastir, Tunisia
| | - A Achour
- Department of Nephrology, Dialysis and Transplant, University Hospital of Sahloul, Sousse, Tunisia
| | - H Bacha
- Laboratory of Research on Biologically Compatible Compounds, Faculty of Dentistry, Monastir, Tunisia
| | - S Abid
- Laboratory of Research on Biologically Compatible Compounds, Faculty of Dentistry, Monastir, Tunisia
| |
Collapse
|
7
|
Del Prete D, Checler F, Chami M. Ryanodine receptors: physiological function and deregulation in Alzheimer disease. Mol Neurodegener 2014; 9:21. [PMID: 24902695 PMCID: PMC4063224 DOI: 10.1186/1750-1326-9-21] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 05/18/2014] [Indexed: 12/21/2022] Open
Abstract
Perturbed Endoplasmic Reticulum (ER) calcium (Ca2+) homeostasis emerges as a central player in Alzheimer disease (AD). Accordingly, different studies have reported alterations of the expression and the function of Ryanodine Receptors (RyR) in human AD-affected brains, in cells expressing familial AD-linked mutations on the β amyloid precursor protein (βAPP) and presenilins (the catalytic core in γ-secretase complexes cleaving the βAPP, thereby generating amyloid β (Aβ) peptides), as well as in the brain of various transgenic AD mice models. Data converge to suggest that RyR expression and function alteration are associated to AD pathogenesis through the control of: i) βAPP processing and Aβ peptide production, ii) neuronal death; iii) synaptic function; and iv) memory and learning abilities. In this review, we document the network of evidences suggesting that RyR could play a complex dual "compensatory/protective versus pathogenic" role contributing to the setting of histopathological lesions and synaptic deficits that are associated with the disease stages. We also discuss the possible mechanisms underlying RyR expression and function alterations in AD. Finally, we review recent publications showing that drug-targeting blockade of RyR and genetic manipulation of RyR reduces Aβ production, stabilizes synaptic transmission, and prevents learning and memory deficits in various AD mouse models. Chemically-designed RyR "modulators" could therefore be envisioned as new therapeutic compounds able to delay or block the progression of AD.
Collapse
Affiliation(s)
| | - Frédéric Checler
- Université de Nice Sophia Antipolis, IPMC, Sophia Antipolis, Nice, F-06560 Valbonne, France.
| | | |
Collapse
|
8
|
Kim JE, Kang JS, Lee WJ. Vitamin C Induces Apoptosis in Human Colon Cancer Cell Line, HCT-8 Via the Modulation of Calcium Influx in Endoplasmic Reticulum and the Dissociation of Bad from 14-3-3β. Immune Netw 2012; 12:189-95. [PMID: 23213312 PMCID: PMC3509163 DOI: 10.4110/in.2012.12.5.189] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 09/05/2012] [Accepted: 09/07/2012] [Indexed: 01/09/2023] Open
Abstract
It has been reported that vitamin C plays an effective role in the treatment and prevention of cancer, but its specific mechanisms are still largely unknown. The incidence of colon cancer is now increasing in Korea. Therefore, we have examined here the effect of vitamin C on the induction of the apoptosis on colon cancer and its related mechanisms. We have found that remarkable increase of the apoptosis and the calcium influx in endoplasmic reticulum (ER) in human colon cancer cell line, HCT-8. However, vitamin C-induced apoptosis was effectively inhibited by the pre-treatment of BAPTA-AM (1,2-bis(o-aminophenoxy) ethane-N,N,N',N'-tetraacetic acid), which is well-known as a calcium specific chelator. During the apoptosis, we found the increase of the translocation of Bad to mitochondria from cytosol, after releasing from 14-3-3β. In this process, the expression of Bax, a well-known pro-apoptotic protein, was also increased. Taken together, vitamin C induces apoptosis of colon cancer cell line, HCT-8 through the increase of 1) the calcium influx in endoplasmic reticulum (ER), 2) the translocation of Bad to mitochondria, and 3) the expression of Bax.
Collapse
Affiliation(s)
- Jee Eun Kim
- Department of Anatomy, Chung-Ang University College of Medicine, Seoul 156-756, Korea
| | | | | |
Collapse
|
9
|
Abdul HM, Baig I, LeVine H, Guttmann RP, Norris CM. Proteolysis of calcineurin is increased in human hippocampus during mild cognitive impairment and is stimulated by oligomeric Abeta in primary cell culture. Aging Cell 2011; 10:103-13. [PMID: 20969723 PMCID: PMC3021581 DOI: 10.1111/j.1474-9726.2010.00645.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Recent reports demonstrate that the activation and interaction of the protease calpain (CP) and the protein phosphatase calcineurin (CN) are elevated in the late stages of Alzheimer's disease (AD). However, the extent to which CPs and CN interact during earlier stages of disease progression remains unknown. Here, we investigated CP and CN protein levels in cytosolic, nuclear, and membrane fractions prepared from human postmortem hippocampal tissue from aged non-demented subjects, and subjects diagnosed with mild cognitive impairment (MCI). The results revealed a parallel increase in CP I and the 48 kDa CN-Aα (ΔCN-Aα48) proteolytic fragment in cytosolic fractions during MCI. In primary rat hippocampal cultures, CP-dependent proteolysis and activation of CN was stimulated by application of oligomeric Aβ((1-42)) peptides. Deleterious effects of Aβ on neuronal morphology were reduced by blockade of either CP or CN. NMDA-type glutamate receptors, which help regulate cognition and neuronal viability, and are modulated by CPs and CN, were also investigated in human hippocampus. Relative to controls, MCI subjects showed significantly greater proteolytic levels of the NR2B subunit. Within subjects, the extent of NR2B proteolysis was strongly correlated with the generation of ΔCN-Aα48 in the cytosol. A similar proteolytic pattern for NR2B was also observed in primary rat hippocampal cultures treated with oligomeric Aβ and prevented by inhibition of CP or CN. Together, the results demonstrate that the activation and interaction of CPs and CN are increased early in cognitive decline associated with AD and may help drive other pathologic processes during disease progression.
Collapse
Affiliation(s)
- Hafiz Mohmmad Abdul
- The Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40536
| | - Irfan Baig
- The Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40536
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40536
| | - Harry LeVine
- The Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40536
- Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY 40536
| | - Rodney P Guttmann
- The Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40536
- Graduate Center for Gerontology, University of Kentucky, Lexington, KY 40536
| | - Christopher M. Norris
- The Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40536
- Department of Molecular and Biomedical Pharmacology, University of Kentucky, Lexington, KY40536
| |
Collapse
|
10
|
Byvaltsev V, Sudakov N, Nikiforov S, Konstantinov Y. Mitochondrial Dysfunction and Neurodegenerative Diseases. World Neurosurg 2010; 74:10-2. [DOI: 10.1016/j.wneu.2010.08.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Indexed: 11/24/2022]
|
11
|
Arduino DM, Esteves AR, Domingues AF, Pereira CMF, Cardoso SM, Oliveira CR. ER-mediated stress induces mitochondrial-dependent caspases activation in NT2 neuron-like cells. BMB Rep 2009; 42:719-24. [PMID: 19944012 DOI: 10.5483/bmbrep.2009.42.11.719] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Recent studies have revealed that endoplasmic reticulum (ER) disturbance is involved in the pathophysiology of neurodegenerative disorders, contributing to the activation of the ER stress-mediated apoptotic pathway. Therefore, we investigated here the molecular mechanisms underlying the ER-mitochondria axis, focusing on calcium as a potential mediator of cell death signals. Using NT2 cells treated with brefeldin A or tunicamycin, we observed that ER stress induces changes in the mitochondrial function, impairing mitochondrial membrane potential and distressing mitochondrial respiratory chain complex Moreover, stress stimuli at ER level evoked calcium fluxes between ER and mitochondria. Under these conditions, ER stress activated the unfolded protein response by an overexpression of GRP78, and also caspase-4 and-2, both involved upstream of caspase-9. Our findings show that ER and mitochondria interconnection plays a prominent role in the induction of neuronal cell death under particular stress circumstances.
Collapse
Affiliation(s)
- Daniela M Arduino
- Centro de Neurociencias e Biologia Celular, Universidade de Coimbra, Coimbra, Portugal
| | | | | | | | | | | |
Collapse
|
12
|
Arduíno DM, Esteves AR, Cardoso SM, Oliveira CR. Endoplasmic reticulum and mitochondria interplay mediates apoptotic cell death: relevance to Parkinson's disease. Neurochem Int 2009; 55:341-8. [PMID: 19375464 DOI: 10.1016/j.neuint.2009.04.004] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Revised: 04/02/2009] [Accepted: 04/07/2009] [Indexed: 01/08/2023]
Abstract
Sporadic Parkinson's disease (PD) is a progressive neurodegenerative disease characterized by a loss of dopaminergic neurons in the substantia nigra pars compacta. Many cellular mechanisms are thought to be involved in the death of these specific neurons in PD, including oxidative stress, changes of intracellular calcium homeostasis, and mitochondrial dysfunction. Since recent studies have revealed that also endoplasmic reticulum (ER) stress in conjunction with abnormal protein degradation can contribute to the PD pathophysiology, we investigated here the molecular mechanisms underlying the interplay between ER and mitochondria and its relevance in the control of neuronal cell death in PD. We observed that MPP+ induced changes in the mitochondrial function, affecting mitochondrial membrane potential and electron transport chain function. Likewise, it was also evident the unfolded protein response activation by an overexpression of GRP78 protein. Moreover, stress stimuli caused the release of Ca2+ from the ER that consistently induced mitochondrial Ca2+ uptake, with a rise of mitochondrial matrix free Ca2+. Besides, Ca2+ release inhibition prevented MPP+ mediated mitochondria-dependent caspases activation. Our findings show that ER and mitochondria are in a close communication, establishing a dynamic ER-Ca2+-mitochondria interconnection that can play a prominent role in the neuronal cell death induction under particular stressful circumstances of PD pathology.
Collapse
Affiliation(s)
- Daniela Moniz Arduíno
- Centro de Neurociências e Biologia Celular, Faculdade de Medicina, Universidade de Coimbra, 3004-504 Coimbra, Portugal
| | | | | | | |
Collapse
|
13
|
Overactivation of calcineurin induced by amyloid-beta and prion proteins. Neurochem Int 2008; 52:1226-33. [PMID: 18295934 DOI: 10.1016/j.neuint.2008.01.005] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2007] [Accepted: 01/05/2008] [Indexed: 11/28/2022]
Abstract
Amyloid-beta protein (A beta) and the scrapie isoform of prion protein (PrPSs) have a central role in the pathogenesis of Alzheimer's disease (AD) and prion-related encephalopathies (PRE), respectively. In both disorders, the deposition of these misfolded proteins is accompanied by apoptotic neuronal loss. However, the pathogenesis and molecular basis of A beta- and PrPSc-neurotoxic effects are not completely understood. The Ca2+/calmodulin-dependent phosphatase calcineurin (CaN), through the dephosphorylation of the proapoptotic protein BAD, may be the link between Ca2+homeostasis deregulation and apoptotic neuronal death. In this study we used primary cultures of rat brain cortical neurons in order to investigate whether A beta and PrP affect CaN activity. We observed that synthetic peptides of A beta (A beta 25-35 and A beta 1-40) and PrP (PrP106-126) increased CaN activity, but did not affect the levels of this protein phosphatase. Moreover, we found that these peptides reduced the levels of BAD phosphorylated at serine residue 112, and this effect was prevented by the CaN inhibitor FK506. Since dephosphorylated BAD translocates to mitochondria, where it triggers cytochrome c release, we determined the levels of BAD in mitochondrial and cytosolic fractions. The data obtained showed that A beta- and PrP-treated neurons had higher levels of BAD in mitochondria than control neurons. This increase in mitochondrial BAD levels was matched by a decrease in cytochrome c. FK506 prevented the alterations of mitochondrial BAD and cytochrome c levels induced by A beta and PrP peptides. Taken together the data suggest that A beta and PrP increased CaN activity, inducing BAD dephosphorylation and translocation to mitochondria and, subsequently, cytochrome c release that may trigger an apoptotic cascade. Therefore, therapeutic strategies targeting CaN might be valuable for these neurodegenerative disorders.
Collapse
|
14
|
Sirk D, Zhu Z, Wadia JS, Shulyakova N, Phan N, Fong J, Mills LR. Chronic exposure to sub-lethal beta-amyloid (Abeta) inhibits the import of nuclear-encoded proteins to mitochondria in differentiated PC12 cells. J Neurochem 2007; 103:1989-2003. [PMID: 17868329 DOI: 10.1111/j.1471-4159.2007.04907.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Studies on amyloid beta (Abeta|), the peptide thought to play a crucial role in the pathogenesis of Alzheimer's disease, have implicated mitochondria in Abeta-mediated neurotoxicity. We used differentiated PC12 cells stably transfected with an inducible green fluorescent protein (GFP) fusion protein containing an N'-terminal mitochondrial targeting sequence (mtGFP), to examine the effects of sub-lethal Abeta on the import of nuclear-encoded proteins to mitochondria. Exposure to sub-lethal Abeta(25-35) (10 mumol/L) for 48 h inhibited mtGFP import to mitochondria; average rates decreased by 20 +/- 4%. Concomitant with the decline in mtGFP, cytoplasmic mtGFP increased significantly while mtGFP expression and intramitochondrial mtGFP turnover were unchanged. Sub-lethal Abeta(1-42) inhibited mtGFP import and increased cytoplasmic mtGFP but only after 96 h. The import of two endogenous nuclear-encoded mitochondrial proteins, mortalin/mtHsp70 and Tom20 also declined. Prior to the decline in import, mitochondrial membrane potential (mmp), and reactive oxygen species levels were unchanged in Abeta-treated cells versus reverse phase controls. Sustained periods of decreased import were associated with decreased mmp, increased reactive oxygen species, increased vulnerability to oxygen-glucose deprivation and altered mitochondrial morphology. These findings suggest that an Abeta-mediated inhibition of mitochondrial protein import, and the consequent mitochondrial impairment, may contribute to Alzheimer's disease.
Collapse
Affiliation(s)
- Daniel Sirk
- Genetics and Development Division, Toronto Western Research Institute, University Health Network Toronto, Ontario, Canada
| | | | | | | | | | | | | |
Collapse
|
15
|
Choi SE, Kim HE, Shin HC, Jang HJ, Lee KW, Kim Y, Kang SS, Chun J, Kang Y. Involvement of Ca2+-mediated apoptotic signals in palmitate-induced MIN6N8a beta cell death. Mol Cell Endocrinol 2007; 272:50-62. [PMID: 17507155 DOI: 10.1016/j.mce.2007.04.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2007] [Revised: 04/06/2007] [Accepted: 04/19/2007] [Indexed: 01/09/2023]
Abstract
The extracellular Ca(2+) chelator EGTA and L-type Ca(2+) channel blockers, such as, nifedipine and nimodipine were found to have a protective effect on palmitate-induced MIN6N8a beta cell apoptosis, whereas the Ca(2+) channel opener, Bay K8644, enhanced the apoptotic process. Moreover, the phospho-form of Bad, in conjunction with phospho-Akt, was reduced in response to palmitate and the palmitate-induced dephosphorylations of Akt and Bad were dependent on Ca(2+) influx. The transient expression of catalytically active Akt prevented MIN6N8a cells from palmitate-induced apoptosis. Deltamethrin, an inhibitor of Ca(2+)-activated phosphatase, delayed Akt and Bad dephosphorylations, and then protected MIN6N8a cells from palmitate-induced apoptosis. On the other hand, palmitate was found to induce CHOP, an apoptotic transcription factor in response to ER stress, and this induction was enhanced by Ca(2+) influx. Our studies suggested that Ca(2+) influx and subsequent Ca(2+)-mediated apoptotic signals are involved in palmitate-induced beta cell death.
Collapse
Affiliation(s)
- Sung-E Choi
- Institute for Medical Science, Ajou University School of Medicine, 442-749 Suwon, Republic of Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Le Prell CG, Yamashita D, Minami SB, Yamasoba T, Miller JM. Mechanisms of noise-induced hearing loss indicate multiple methods of prevention. Hear Res 2007; 226:22-43. [PMID: 17141991 PMCID: PMC1995566 DOI: 10.1016/j.heares.2006.10.006] [Citation(s) in RCA: 230] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2006] [Revised: 10/05/2006] [Accepted: 10/24/2006] [Indexed: 12/20/2022]
Abstract
Recent research has shown the essential role of reduced blood flow and free radical formation in the cochlea in noise-induced hearing loss (NIHL). The amount, distribution, and time course of free radical formation have been defined, including a clinically significant late formation 7-10 days following noise exposure, and one mechanism underlying noise-induced reduction in cochlear blood flow has finally been identified. These new insights have led to the formulation of new hypotheses regarding the molecular mechanisms of NIHL; and, from these, we have identified interventions that prevent NIHL, even with treatment onset delayed up to 3 days post-noise. It is essential to now assess the additive effects of agents intervening at different points in the cell death pathway to optimize treatment efficacy. Finding safe and effective interventions that attenuate NIHL will provide a compelling scientific rationale to justify human trials to eliminate this single major cause of acquired hearing loss.
Collapse
Affiliation(s)
- Colleen G Le Prell
- Kresge Hearing Research Institute, University of Michigan, 1301 East Ann Street, Ann Arbor, MI 48109-0506, USA.
| | | | | | | | | |
Collapse
|
17
|
Carruthers NJ, Dowd MK, Stemmer PM. Gossypol inhibits calcineurin phosphatase activity at multiple sites. Eur J Pharmacol 2007; 555:106-14. [PMID: 17141216 DOI: 10.1016/j.ejphar.2006.10.046] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2006] [Revised: 10/12/2006] [Accepted: 10/19/2006] [Indexed: 12/01/2022]
Abstract
Calcineurin, the Ca2+/calmodulin-dependant serine/threonine phosphatase is the target for the immunosuppressant drugs FK506 and cyclosporine-A. These established calcineurin inhibitors each require an immunophilin protein cofactor. Gossypol, a polyphenol produced by the cotton plant, inhibits calcineurin (IC50=15 microM), in a noncompetitive, reversible manner, and is independent of any cofactor. We found that gossypol acts by at least two mechanisms to inhibit calcineurin phosphatase activity. A calmodulin-independent form of calcineurin was less sensitive to inhibition by gossypol than native calcineurin (IC50=41 and 18 microM, respectively) indicating that gossypol may interfere with calmodulin binding. A fluorescence polarization based assay demonstrated that 100 microM gossypol reduced the affinity of calmodulin for calcineurin (from K(d)=2.4 to 250 nM). Inhibition of calcineurin phosphatase activity by gossypol could not be overcome by adding excess calmodulin or by testing the inhibition toward a calmodulin-independent calcineurin indicating that gossypol acts at a site different from the calmodulin-binding site. Gossypol decreased the affinity of calcineurin for immunosuppressant/immunophilin complexes only in the presence of calmodulin, indicating that gossypol blocks the effects of calmodulin binding to calcineurin. In addition, gossypol had a stimulatory effect on native calcineurin in the absence of calmodulin, possibly indicating a calmodulin mimetic effect. Gossypol exists in two enantiomeric forms which are reported to have different potency for cell toxicity. (+) and (-) gossypol had equivalent potency for inhibition of native and calmodulin-independent calcineurin phosphatase activity, and for inhibition of calmodulin binding. The inhibition of calcineurin by gossypol via multiple binding sites without stereo-specificity indicates that gossypol is not a specific calcineurin inhibitor.
Collapse
Affiliation(s)
- Nicholas J Carruthers
- Wayne State University, Institute of Environmental Health Sciences, Detroit, MI 48201, United States
| | | | | |
Collapse
|
18
|
Mansuy IM, Shenolikar S. Protein serine/threonine phosphatases in neuronal plasticity and disorders of learning and memory. Trends Neurosci 2006; 29:679-86. [PMID: 17084465 DOI: 10.1016/j.tins.2006.10.004] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2006] [Revised: 07/28/2006] [Accepted: 10/19/2006] [Indexed: 01/12/2023]
Abstract
Phosphorylation and dephosphorylation of cellular proteins by protein kinases and phosphatases represent important mechanisms for controlling major biological events. In the nervous system, protein phosphatases are contained in highly dynamic complexes localized within specialized subcellular compartments and they ensure timely dephosphorylation of multiple neuronal phosphoproteins. This modulates the responsiveness of individual synapses to neural activity and controls synaptic plasticity. These enzymes in turn play a key role in many forms of learning and memory, and their dysfunction contributes to cognitive deficits associated with aging and dementias or neurodegenerative diseases. Here, we review key modes of regulation of neuronal protein serine/threonine phosphatases and their contribution to disorders of learning and memory.
Collapse
Affiliation(s)
- Isabelle M Mansuy
- Brain Research Institute, Medical Faculty of the University Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.
| | | |
Collapse
|
19
|
Grazina M, Pratas J, Silva F, Oliveira S, Santana I, Oliveira C. Genetic basis of Alzheimer's dementia: role of mtDNA mutations. GENES BRAIN AND BEHAVIOR 2006; 5 Suppl 2:92-107. [PMID: 16681804 DOI: 10.1111/j.1601-183x.2006.00225.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Alzheimer's disease (AD) is the most common neurodegenerative disorder associated to dementia in late adulthood. Amyloid precursor protein, presenilin 1 and presenilin 2 genes have been identified as causative genes for familial AD, whereas apolipoprotein E epsilon4 allele has been associated to the risk for late onset AD. However, mutations on these genes do not explain the majority of cases. Mitochondrial respiratory chain (MRC) impairment has been detected in brain, muscle, fibroblasts and platelets of Alzheimer's patients, indicating a possible involvement of mitochondrial DNA (mtDNA) in the aetiology of the disease. Several reports have identified mtDNA mutations in Alzheimer's patients, suggesting the existence of related causal factors probably of mtDNA origin, thus pointing to the involvement of mtDNA in the risk contributing to dementia, but there is no consensual opinion in finding the cause for impairment. However, mtDNA mutations might modify age of onset, contributing to the neurodegenerative process, probably due to an impairment of MRC and/or translation mechanisms.
Collapse
Affiliation(s)
- M Grazina
- Biochemistry Institute, Faculty of Medicine, University of Coimbra, Rua Larga, Coimbra, Portugal
| | | | | | | | | | | |
Collapse
|