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Xu M, Qian Y, Li X, Gu B, He S, Lu X, Song S. Janus ACSP Nanoparticle for Synergistic Chemodynamic Therapy and Radiosensitization. ACS APPLIED MATERIALS & INTERFACES 2024; 16:17242-17252. [PMID: 38556729 DOI: 10.1021/acsami.4c00499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
Protective autophagy and DNA damage repair lead to tumor radio-resistance. Some hypoxic tumors exhibit a low radiation energy absorption coefficient in radiation therapy. High doses of X-rays may lead to side effects in the surrounding normal tissues. In order to overcome the radio-resistance and improve the efficacy of radiotherapy based on the characteristics of the tumor microenvironment, the development of radiosensitizers has attracted much attention. In this study, a Janus ACSP nanoparticle (NP) was developed for chemodynamic therapy and radiosensitization. The reactive oxygen species generated by the Fenton-like reaction regulated the distribution of cell cycles from a radioresistant phase to a radio-sensitive phase. The high-Z element, Au, enhanced the production of hydroxyl radicals (•OH) under X-ray radiation, promoting DNA damage and cell apoptosis. The NP delayed DNA damage repair by interfering with certain proteins involved in the DNA repair signaling pathway. In vivo experiments demonstrated that the combination of the copper-ion-based Fenton-like reaction and low-dose X-ray radiation enhanced the effectiveness of radiotherapy, providing a novel approach for synergistic chemodynamic and radiosensitization therapy. This study provides valuable insights and strategies for the development and application of NPs in cancer treatment.
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Affiliation(s)
- Mingzhen Xu
- Department of Nuclear Medicine, Shanghai Proton and Heavy Ion Center, Fudan University Shanghai Cancer Center, Shanghai 201315, China
- Shanghai Key Laboratory of Radiation Oncology, Shanghai 201315, China
- Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai 201315, China
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Xuhui District, No. 270 Dong'an Road, Shanghai 200032, China
| | - Yuyi Qian
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Xuhui District, No. 270 Dong'an Road, Shanghai 200032, China
| | - Xinyi Li
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Xuhui District, No. 270 Dong'an Road, Shanghai 200032, China
| | - Bingxin Gu
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Xuhui District, No. 270 Dong'an Road, Shanghai 200032, China
| | - Simin He
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Xuhui District, No. 270 Dong'an Road, Shanghai 200032, China
| | - Xin Lu
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Xuhui District, No. 270 Dong'an Road, Shanghai 200032, China
| | - Shaoli Song
- Department of Nuclear Medicine, Shanghai Proton and Heavy Ion Center, Fudan University Shanghai Cancer Center, Shanghai 201315, China
- Shanghai Key Laboratory of Radiation Oncology, Shanghai 201315, China
- Shanghai Engineering Research Center of Proton and Heavy Ion Radiation Therapy, Shanghai 201315, China
- Department of Nuclear Medicine, Fudan University Shanghai Cancer Center, Xuhui District, No. 270 Dong'an Road, Shanghai 200032, China
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Xie D, Song C, Qin T, Zhai Z, Cai J, Dai J, Sun T, Xu Y. Moschus ameliorates glutamate-induced cellular damage by regulating autophagy and apoptosis pathway. Sci Rep 2023; 13:18586. [PMID: 37903904 PMCID: PMC10616123 DOI: 10.1038/s41598-023-45878-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 10/25/2023] [Indexed: 11/01/2023] Open
Abstract
Alzheimer's disease (AD), a neurodegenerative disorder, causes short-term memory and cognition declines. It is estimated that one in three elderly people die from AD or other dementias. Chinese herbal medicine as a potential drug for treating AD has gained growing interest from many researchers. Moschus, a rare and valuable traditional Chinese animal medicine, was originally documented in Shennong Ben Cao Jing and recognized for its properties of reviving consciousness/resuscitation. Additionally, Moschus has the efficacy of "regulation of menstruation with blood activation, relief of swelling and pain" and is used for treating unconsciousness, stroke, coma, and cerebrovascular diseases. However, it is uncertain whether Moschus has any protective effect on AD patients. We explored whether Moschus could protect glutamate (Glu)-induced PC12 cells from cellular injury and preliminarily explored their related action mechanisms. The chemical compounds of Moschus were analyzed and identified by GC-MS. The Glu-induced differentiated PC12 cell model was thought to be the common AD cellular model. The study aims to preliminarily investigate the intervention effect of Moschus on Glu-induced PC12 cell damage as well as their related action mechanisms. Cell viability, lactate dehydrogenase (LDH), mitochondrial reactive oxygen species, mitochondrial membrane potential (MMP), cell apoptosis, autophagic vacuoles, autolysosomes or autophagosomes, proteins related to apoptosis, and the proteins related to autophagy were examined and analyzed. Seventeen active compounds of the Moschus sample were identified based on GC-MS analysis. In comparison to the control group, Glu stimulation increased cell viability loss, LDH release, mitochondrial damage, loss of MMP, apoptosis rate, and the number of cells containing autophagic vacuoles, and autolysosomes or autophagosomes, while these results were decreased after the pretreatment with Moschus and 3-methyladenine (3-MA). Furthermore, Glu stimulation significantly increased cleaved caspase-3, Beclin1, and LC3II protein expression, and reduced B-cell lymphoma 2/BAX ratio and p62 protein expression, but these results were reversed after pretreatment of Moschus and 3-MA. Moschus has protective activity in Glu-induced PC12 cell injury, and the potential mechanism might involve the regulation of autophagy and apoptosis. Our study may promote research on Moschus in the field of neurodegenerative diseases, and Moschus may be considered as a potential therapeutic agent for AD.
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Affiliation(s)
- Danni Xie
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Caiyou Song
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Tao Qin
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Zhenwei Zhai
- School of Medical Information Engineering, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Jie Cai
- School of Medical Information Engineering, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Jingyi Dai
- School of Medical Information Engineering, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China
| | - Tao Sun
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
- School of Medical Information Engineering, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, China.
| | - Ying Xu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, 610072, China.
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Swinter K, Salah D, Rathnayake R, Gunawardena S. PolyQ-Expansion Causes Mitochondria Fragmentation Independent of Huntingtin and Is Distinct from Traumatic Brain Injury (TBI)/Mechanical Stress-Mediated Fragmentation Which Results from Cell Death. Cells 2023; 12:2406. [PMID: 37830620 PMCID: PMC10572422 DOI: 10.3390/cells12192406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 10/14/2023] Open
Abstract
Mitochondrial dysfunction has been reported in many Huntington's disease (HD) models; however, it is unclear how these defects occur. Here, we test the hypothesis that excess pathogenic huntingtin (HTT) impairs mitochondrial homeostasis, using Drosophila genetics and pharmacological inhibitors in HD and polyQ-expansion disease models and in a mechanical stress-induced traumatic brain injury (TBI) model. Expression of pathogenic HTT caused fragmented mitochondria compared to normal HTT, but HTT did not co-localize with mitochondria under normal or pathogenic conditions. Expression of pathogenic polyQ (127Q) alone or in the context of Machado Joseph Disease (MJD) caused fragmented mitochondria. While mitochondrial fragmentation was not dependent on the cellular location of polyQ accumulations, the expression of a chaperone protein, excess of mitofusin (MFN), or depletion of dynamin-related protein 1 (DRP1) rescued fragmentation. Intriguingly, a higher concentration of nitric oxide (NO) was observed in polyQ-expressing larval brains and inhibiting NO production rescued polyQ-mediated fragmented mitochondria, postulating that DRP1 nitrosylation could contribute to excess fission. Furthermore, while excess PI3K, which suppresses polyQ-induced cell death, did not rescue polyQ-mediated fragmentation, it did rescue fragmentation caused by mechanical stress/TBI. Together, our observations suggest that pathogenic polyQ alone is sufficient to cause DRP1-dependent mitochondrial fragmentation upstream of cell death, uncovering distinct physiological mechanisms for mitochondrial dysfunction in polyQ disease and mechanical stress.
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Affiliation(s)
| | | | | | - Shermali Gunawardena
- Department of Biological Sciences, State University of New York at Buffalo, Buffalo, NY 14260, USA
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4
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Nurzhan S, Bekezhankyzy Z, Ding H, Berdigaliyev N, Sergazy S, Gulyayev A, Shulgau Z, Triggle CR, Aljofan M. The Effect of Different Glucose Concentrations on the Antiproliferative Activity of Metformin in MCF-7 Breast Cancer Cells. Pharmaceutics 2023; 15:2186. [PMID: 37765157 PMCID: PMC10537756 DOI: 10.3390/pharmaceutics15092186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/17/2023] [Accepted: 08/17/2023] [Indexed: 09/29/2023] Open
Abstract
The glucose-lowering drug metformin has been reported to have anticancer properties through unknown mechanisms. Other unknown factors that may influence its anticancer potential include the glycemic status of the patient. Therefore, the objective of this study is to determine the effect of different glucose environments on the antiproliferative potency and the cellular mechanism of action of metformin. Human breast cancer cells, MCF-7, were incubated in low, normal, elevated, and high glucose environments and treated with metformin. The antiproliferative potential of metformin and its effect on protein expression as well as its ability to induce cellular apoptosis and autophagy under different glucose environments, were determined using different molecular techniques. Metformin significantly inhibited cellular proliferation in a time- and glucose-concentration-dependent manner. In comparison to elevated glucose, low normal glucose alone induced a significant level of autophagy that was further increased in the presence of metformin. While glucose concentration did not appear to have an effect on the antiproliferative potency of metformin, the cellular basis of action was shown to be glucose-dependent. The antiproliferative mechanism of action of metformin in elevated and low normal glucose environments is mTOR-dependent, whereas, in the high glucose environment, the antiproliferative mechanism is independent of mTOR. This is the first study to report that both the antiproliferative potency and the cellular mechanism of action aredependent on the concentration of glucose.
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Affiliation(s)
- Sholpan Nurzhan
- Department of Biomedical Sciences, School of Medicine, Nazarbayev University, Astana Z05H0P9, Kazakhstan; (S.N.); (Z.B.); (N.B.)
- National Center for Biotechnology, Astana Z05K8D5, Kazakhstan; (S.S.); (A.G.)
| | - Zhibek Bekezhankyzy
- Department of Biomedical Sciences, School of Medicine, Nazarbayev University, Astana Z05H0P9, Kazakhstan; (S.N.); (Z.B.); (N.B.)
- National Center for Biotechnology, Astana Z05K8D5, Kazakhstan; (S.S.); (A.G.)
| | - Hong Ding
- Department of Pharmacology, Weill Cornell Medicine in Qatar, Education City, Doha P.O. Box 24144, Qatar; (H.D.); (C.R.T.)
| | - Nurken Berdigaliyev
- Department of Biomedical Sciences, School of Medicine, Nazarbayev University, Astana Z05H0P9, Kazakhstan; (S.N.); (Z.B.); (N.B.)
- National Center for Biotechnology, Astana Z05K8D5, Kazakhstan; (S.S.); (A.G.)
| | - Shynggys Sergazy
- National Center for Biotechnology, Astana Z05K8D5, Kazakhstan; (S.S.); (A.G.)
- Drug Discovery and Development Laboratory, National Laboratory Astana, Nazarbayev University, Astana Z05H0P9, Kazakhstan
- Research Institute of Balneology and Medical Rehabilitation, Akmola Region, Burabay 021708, Kazakhstan
| | - Alexander Gulyayev
- National Center for Biotechnology, Astana Z05K8D5, Kazakhstan; (S.S.); (A.G.)
- Drug Discovery and Development Laboratory, National Laboratory Astana, Nazarbayev University, Astana Z05H0P9, Kazakhstan
- Research Institute of Balneology and Medical Rehabilitation, Akmola Region, Burabay 021708, Kazakhstan
| | - Zarina Shulgau
- National Center for Biotechnology, Astana Z05K8D5, Kazakhstan; (S.S.); (A.G.)
- Drug Discovery and Development Laboratory, National Laboratory Astana, Nazarbayev University, Astana Z05H0P9, Kazakhstan
| | - Christopher R. Triggle
- Department of Pharmacology, Weill Cornell Medicine in Qatar, Education City, Doha P.O. Box 24144, Qatar; (H.D.); (C.R.T.)
| | - Mohamad Aljofan
- Department of Biomedical Sciences, School of Medicine, Nazarbayev University, Astana Z05H0P9, Kazakhstan; (S.N.); (Z.B.); (N.B.)
- Drug Discovery and Development Laboratory, National Laboratory Astana, Nazarbayev University, Astana Z05H0P9, Kazakhstan
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5
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Guo W, Xing Y, Luo X, Li F, Ren M, Liang Y. Reactive Oxygen Species: A Crosslink between Plant and Human Eukaryotic Cell Systems. Int J Mol Sci 2023; 24:13052. [PMID: 37685857 PMCID: PMC10487619 DOI: 10.3390/ijms241713052] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 08/18/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023] Open
Abstract
Reactive oxygen species (ROS) are important regulating factors that play a dual role in plant and human cells. As the first messenger response in organisms, ROS coordinate signals in growth, development, and metabolic activity pathways. They also can act as an alarm mechanism, triggering cellular responses to harmful stimuli. However, excess ROS cause oxidative stress-related damage and oxidize organic substances, leading to cellular malfunctions. This review summarizes the current research status and mechanisms of ROS in plant and human eukaryotic cells, highlighting the differences and similarities between the two and elucidating their interactions with other reactive substances and ROS. Based on the similar regulatory and metabolic ROS pathways in the two kingdoms, this review proposes future developments that can provide opportunities to develop novel strategies for treating human diseases or creating greater agricultural value.
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Affiliation(s)
- Wei Guo
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (W.G.); (Y.X.); (F.L.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Yadi Xing
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (W.G.); (Y.X.); (F.L.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
| | - Xiumei Luo
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610000, China;
| | - Fuguang Li
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (W.G.); (Y.X.); (F.L.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
- Hainan Yazhou Bay Seed Laboratory, Sanya 572000, China
| | - Maozhi Ren
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (W.G.); (Y.X.); (F.L.)
- Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610000, China;
- Hainan Yazhou Bay Seed Laboratory, Sanya 572000, China
| | - Yiming Liang
- Zhengzhou Research Base, National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, School of Agricultural Sciences, Zhengzhou University, Zhengzhou 450001, China; (W.G.); (Y.X.); (F.L.)
- National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization, Institute of Cotton Research, Chinese Academy of Agricultural Sciences, Anyang 455000, China
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6
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Kumar S, Choudhary N, Faruq M, Kumar A, Saran RK, Indercanti PK, Singh V, Sait H, Jaitley S, Valis M, Kuca K, Polipalli SK, Kumar M, Singh T, Suravajhala P, Sharma R, Kapoor S. Anastrozole-mediated modulation of mitochondrial activity by inhibition of mitochondrial permeability transition pore opening: an initial perspective. J Biomol Struct Dyn 2023; 41:14063-14079. [PMID: 36815262 DOI: 10.1080/07391102.2023.2176927] [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: 09/12/2022] [Accepted: 01/31/2023] [Indexed: 02/24/2023]
Abstract
The mitochondrial permeability transition pore (mtPTP) plays a vital role in altering the structure and function of mitochondria. Cyclophilin D (CypD) is a mitochondrial protein that regulates mtPTP function and a known drug target for therapeutic studies involving mitochondria. While the effect of aromatase inhibition on the mtPTP has been studied previously, the effect of anastrozole on the mtPTP has not been completely elucidated. The role of anastrozole in modulating the mtPTP was evaluated by docking, molecular dynamics and network-guided studies using human CypD data. The peripheral blood mononuclear cells (PBMCs) of patients with mitochondrial disorders and healthy controls were treated with anastrozole and evaluated for mitochondrial permeability transition pore (mtPTP) function and apoptosis using a flow cytometer. Spectrophotometry was employed for estimating total ATP levels. The anastrozole-CypD complex is more stable than cyclosporin A (CsA)-CypD. Anastrozole performed better than cyclosporine in inhibiting mtPTP. Additional effects included inducing mitochondrial membrane depolarization and a reduction in mitochondrial swelling and superoxide generation, intrinsic caspase-3 activity and cellular apoptosis, along with an increase in ATP levels. Anastrozole may serve as a potential therapeutic agent for mitochondrial disorders and ameliorate the clinical phenotype by regulating the activity of mtPTP. However, further studies are required to substantiate our preliminary findings.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Somesh Kumar
- Pediatrics Genetics & Research Laboratory, Department of Pediatrics, Maulana Azad Medical College & Associated LN Hospital, Delhi, India
| | - Neha Choudhary
- Centre for Computational Biology and Bioinformatics, Central University of Himachal Pradesh, Dharamsala, India
| | - Mohammed Faruq
- Institute of Genomics and Integrative Biology, Council of Scientific and Industrial Research (CSIR), Delhi, India
| | - Arun Kumar
- Department of Emergency Medicine, All India Institute of Medical Sciences (AIIMS), New Delhi, India
- Department of Zoology, Kirori Mal College, University of Delhi, Delhi, India
| | - Ravindra K Saran
- Department of Pathology, Govind Ballabh Pant Institute of Postgraduate Medical Education and Research, Delhi, India
| | | | - Vikram Singh
- Centre for Computational Biology and Bioinformatics, Central University of Himachal Pradesh, Dharamsala, India
| | - Haseena Sait
- Pediatrics Genetics & Research Laboratory, Department of Pediatrics, Maulana Azad Medical College & Associated LN Hospital, Delhi, India
| | - Sunita Jaitley
- Department of Biomedical Sciences, Acharya Narendra Dev College, University of Delhi, Delhi, India
| | - Martin Valis
- Department of Neurology of the Medical Faculty of Charles University and University Hospital in Hradec Králové, Hradec Králové, Czech Republic
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Králové, Hradec Králové, Czech Republic
| | - Sunil K Polipalli
- Pediatrics Genetics & Research Laboratory, Department of Pediatrics, Maulana Azad Medical College & Associated LN Hospital, Delhi, India
| | - Manoj Kumar
- Department of Emergency Medicine, All India Institute of Medical Sciences (AIIMS), New Delhi, India
- Department of Microbiology, World College of Medical Science and Research, Jhajjar, Haryana, India
| | - Tejveer Singh
- Molecular Oncology Laboratory, Department of Zoology, University of Delhi, Delhi, India
| | | | - Rohit Sharma
- Department of Rasa Shastra and Bhaishajya Kalpana, Faculty of Ayurveda, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Seema Kapoor
- Pediatrics Genetics & Research Laboratory, Department of Pediatrics, Maulana Azad Medical College & Associated LN Hospital, Delhi, India
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7
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He Y, Chen Z, Zhang R, Quan Z, Xu Y, He B, Ren Y. Mitochondrial-Targeted Antioxidant Peptide SS31 Prevents RPE Cell Death under Oxidative Stress. BIOMED RESEARCH INTERNATIONAL 2022; 2022:6180349. [PMID: 35669730 PMCID: PMC9167025 DOI: 10.1155/2022/6180349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/28/2022] [Accepted: 05/03/2022] [Indexed: 12/13/2022]
Abstract
This work aims at investigating the protective effects of the mitochondria-targeted peptide SS31, on mitochondria function, preventing human retinal pigment epithelial cell-19 (ARPE-19) cell apoptosis. The ARPE-19 cells were subjected to 24 h of intervention with H2O2 of various concentrations (0, 100, 150, 200, 250, 300, and 500 μmol/L). Various concentrations of SS31 (10 nM, 100 nM, and 1 μmol/L) pretreated the cells for 2 h. The MTT assay determined cell viability. ARPE-19 cell apoptosis was observed by 4',6-diamidino-2-phenylindole (DAPI) staining under fluorescence microscope and detected by Annexin-V/PI staining under flow cytometry. The measurement of reactive oxygen species (ROS) release level used MitoSOX Red (a mitochondrial superoxide indicator) and the probe 2'-7'dichlorofluorescin diacetate (DCFH-DA). And with the use of a JC-1 probe, the mitochondrial membrane potential (MMP; ΔΨm) was analyzed. Reverse transcription polymerase chain reaction (RT-PCR) and real-time PCR were responsible for measuring the levels of apoptosis related genes (Bcl-2, Bax, and Caspase-3). The cell viability increased significantly with SS31 pretreated (P < 0.05). In the SS31 + H2O2 group, the fluorescence of the cell nuclei with DAPI staining was weaker than H2O2 along group accordance with the decreased ratio of apoptotic cells (P < 0.05). The ROS generation decreased in SS31 pretreated group, with the increased ΔΨm. The RT-PCR result showed decreased Bax gene and Caspase-3 gene expression with SS31 pretreatment, while increased antiapoptotic gene Bcl-2 (P < 0.05). We provide evidence that SS31 promotes resilience of RPE cells to oxidative stress by stabilizing mitochondrial function.
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Affiliation(s)
- Yuan He
- Department of Ophthalmology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, China
- Xi'an Medical University, Xi'an, China
| | | | - Ruixue Zhang
- Department of Ophthalmology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, China
| | - Zhuoya Quan
- Department of Ophthalmology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, China
| | - Yun Xu
- Xi'an Medical University, Xi'an, China
| | - Beilei He
- Xi'an Medical University, Xi'an, China
| | - Yuan Ren
- Department of Ophthalmology, The Second Affiliated Hospital of Xi'an Medical University, Xi'an, China
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8
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Castillo SR, Rickeard BW, DiPasquale M, Nguyen MHL, Lewis-Laurent A, Doktorova M, Kav B, Miettinen MS, Nagao M, Kelley EG, Marquardt D. Probing the Link between Pancratistatin and Mitochondrial Apoptosis through Changes in the Membrane Dynamics on the Nanoscale. Mol Pharm 2022; 19:1839-1852. [PMID: 35559658 DOI: 10.1021/acs.molpharmaceut.1c00926] [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: 11/28/2022]
Abstract
Pancratistatin (PST) is a natural antiviral alkaloid that has demonstrated specificity toward cancerous cells and explicitly targets the mitochondria. PST initiates apoptosis while leaving healthy, noncancerous cells unscathed. However, the manner by which PST induces apoptosis remains elusive and impedes the advancement of PST as a natural anticancer therapeutic agent. Herein, we use neutron spin-echo (NSE) spectroscopy, molecular dynamics (MD) simulations, and supporting small angle scattering techniques to study PST's effect on membrane dynamics using biologically representative model membranes. Our data suggests that PST stiffens the inner mitochondrial membrane (IMM) by being preferentially associated with cardiolipin, which would lead to the relocation and release of cytochrome c. Second, PST has an ordering effect on the lipids and disrupts their distribution within the IMM, which would interfere with the maintenance and functionality of the active forms of proteins in the electron transport chain. These previously unreported findings implicate PST's effect on mitochondrial apoptosis.
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Affiliation(s)
- Stuart R Castillo
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Brett W Rickeard
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Mitchell DiPasquale
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Michael H L Nguyen
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Aislyn Lewis-Laurent
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Milka Doktorova
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine, Charlottesville, Virginia 22903, United States
| | - Batuhan Kav
- Max-Planck Institute of Colloids and Interfaces, Potsdam 14476, Germany.,Institute of Biological Information Processing: Structural Biochemistry (IBI-7), Forschungszentrum Julich, Julich 52428, Germany
| | | | - Michihiro Nagao
- National Institute of Standards and Technology, Center for Neutron Research, Gaithersburg, Maryland 20899, United States.,Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States.,Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, United States
| | - Elizabeth G Kelley
- National Institute of Standards and Technology, Center for Neutron Research, Gaithersburg, Maryland 20899, United States
| | - Drew Marquardt
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada.,Department of Physics, University of Windsor, Windsor, Ontario N9B 3P4, Canada
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9
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Kulbay M, Johnson B, Ricaud G, Séguin-Grignon MN, Bernier J. Energetic metabolic reprogramming in Jurkat DFF40-deficient cancer cells. Mol Cell Biochem 2022; 477:2213-2233. [PMID: 35460011 DOI: 10.1007/s11010-022-04433-0] [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: 10/02/2021] [Accepted: 04/04/2022] [Indexed: 11/25/2022]
Abstract
DNA fragmentation factor 40 (DFF40), or the caspase-activated DNase (CAD), is an endonuclease specific for double-stranded DNA. Alterations in its function and expression have been linked to apoptosis resistance, a mechanism likely used by cancer cells. However, how the DFF40-related apoptosis resistance pathway occurs remains unclear. Here, we sought to determine if DFF40 expression could be linked to cell metabolism through the regulation of mitochondrial integrity and function. We demonstrated that DFF40-deficient cells are more resistant to staurosporine and tributyltin (TBT)-induced apoptosis, and express higher levels of Mcl-1 at basal state. Treatment with TBT induces higher Bcl-2 and caspase-9 mRNA transcripts in DFF40 KO Jurkat cells, as well as enhanced Bcl-2 phosphorylation. A loss of DFF40 expression induces a higher mitochondrial mass, mtDNA copy number, mitochondrial membrane potential, and glycolysis rates in resting T cells. DFF40-deficient cells exhibit the Warburg effect phenotype, where they rely significantly more on glycolysis than oxidative phosphorylation and have a higher proliferative state, demonstrated by a higher Ki-67 transcription factor expression and AKT phosphorylation. Finally, we demonstrated with cell fractioning that DFF40 can translocate to the mitochondria following apoptosis induction. Our study reveals that DFF40 may act as a regulator of mitochondria during cell death and its loss could compromise mitochondrial integrity and cause an energetic reprogramming in pathologies such as cancer.
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Affiliation(s)
- Merve Kulbay
- INRS-Centre Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, QC, H7V 1B7, Canada
- Department of Medicine, Université de Montréal, 2900 Blvd. Edouard Montpetit, Montréal, QC, Canada
| | - Bruno Johnson
- INRS-Centre Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, QC, H7V 1B7, Canada
| | - Guillaume Ricaud
- INRS-Centre Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, QC, H7V 1B7, Canada
| | | | - Jacques Bernier
- INRS-Centre Armand-Frappier Santé Biotechnologie, 531 Boul. des Prairies, Laval, QC, H7V 1B7, Canada.
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10
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Liu Q, Wu D, Ma Y, Cao Y, Pang Y, Tang M, Pu Y, Zhang T. Intracellular reactive oxygen species trigger mitochondrial dysfunction and apoptosis in cadmium telluride quantum dots-induced liver damage. NANOIMPACT 2022; 25:100392. [PMID: 35559896 DOI: 10.1016/j.impact.2022.100392] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 01/26/2022] [Accepted: 02/14/2022] [Indexed: 06/15/2023]
Abstract
Quantum dots (QDs), also known as semiconductor QDs, have specific photoelectricproperties which find application in bioimaging, solar cells, and light-emitting diodes (LEDs). However, the application of QDs is often limited by issues related to health risks and potential toxicity. The purpose of this study was to provide evidence regarding the safety of cadmium telluride (CdTe) QDs by exploring the detailed mechanisms involved in its hepatotoxicity. This study showed that CdTe QDs can increase reactive oxygen species (ROS) in hepatocytes after being taken up by hepatocytes, which triggers a significant mitochondrial-dependent apoptotic pathway, leading to hepatocyte apoptosis. CdTe QDs-induce mitochondrial cristae abnormality, adenosine triphosphate (ATP) depletion, and mitochondrial membrane potential (MMP) depolarization. Meanwhile, CdTe QDs can change the morphology, function, and quantity of mitochondria by reducing fission and intimal fusion. Importantly, inhibition of ROS not only protects hepatocyte viability but can also interfere with apoptosis and activation of mitochondrial dysfunction. Similarly, the exposure of CdTe QDs in Institute of Cancer Research (ICR) mice showed that CdTe QDs caused oxidative damage and apoptosis in liver tissue. NAC could effectively remove excess ROS could reduce the level of oxidative stress and significantly alleviate CdTe QDs-induced hepatotoxicity in vivo. CdTe QDs-induced hepatotoxicity may originate from the generation of intracellular ROS, leading to mitochondrial dysfunction and apoptosis, which was potentially regulated by mitochondrial dynamics. This study revealed the nanobiological effects of CdTe QDs and the intricate mechanisms involved in its toxicity at the tissue, cell, and subcellular levels and provides information for narrowing the gap between in vitro and in vivo animal studies and a safety assessment of QDs.
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Affiliation(s)
- Qing Liu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Daming Wu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China; Jiaxing Center for Disease Control and Prevention, Jiaxing, 314050, China
| | - Ying Ma
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Yuna Cao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Yanting Pang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Meng Tang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Yuepu Pu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China
| | - Ting Zhang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, 210009, China.
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11
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Kan S, Duan M, Liu Y, Wang C, Xie J. Role of Mitochondria in Physiology of Chondrocytes and Diseases of Osteoarthritis and Rheumatoid Arthritis. Cartilage 2021; 13:1102S-1121S. [PMID: 34894777 PMCID: PMC8804744 DOI: 10.1177/19476035211063858] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
PURPOSE OF REVIEW Mitochondria are recognized to be one of the most important organelles in chondrocytes for their role in triphosphate (ATP) generation through aerobic phosphorylation. Mitochondria also participate in many intracellular processes involving modulating reactive oxygen species (ROS), responding to instantaneous hypoxia stress, regulating cytoplasmic transport of calcium ion, and directing mitophagy to maintain the homeostasis of individual chondrocytes. DESIGNS To summarize the specific role of mitochondria in chondrocytes, we screened related papers in PubMed database and the search strategy is ((mitochondria) AND (chondrocyte)) AND (English [Language]). The articles published in the past 5 years were included and 130 papers were studied. RESULTS In recent years, the integrity of mitochondrial structure has been regarded as a prerequisite for normal chondrocyte survival and defect in mitochondrial function has been found in cartilage-related diseases, such as osteoarthritis (OA) and rheumatoid arthritis (RA). However, the understanding of mitochondria in cartilage is still largely limited. The mechanism on how the changes in mitochondrial structure and function directly lead to the occurrence and development of cartilage-related diseases remains to be elusive. CONCLUSION This review aims to summarize the role of mitochondria in chondrocytes under the physiological and pathological changes from ATP generation, calcium homeostasis, redox regulation, mitophagy modulation, mitochondria biogenesis to immune response activation. The enhanced understanding of molecular mechanisms in mitochondria might offer some new cues for cartilage remodeling and pathological intervention.
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Affiliation(s)
- Shiyi Kan
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Mengmeng Duan
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yang Liu
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chunli Wang
- “111” Project Laboratory of
Biomechanics and Tissue Repair, Bioengineering College, Chongqing University,
Chongqing, China
| | - Jing Xie
- State Key Laboratory of Oral Diseases,
West China Hospital of Stomatology, Sichuan University, Chengdu, China,“111” Project Laboratory of
Biomechanics and Tissue Repair, Bioengineering College, Chongqing University,
Chongqing, China,Lab of Bone & Joint Disease, State
Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan
University, Chengdu, China,Jing Xie, Lab of Bone & Joint Disease,
State Key Laboratory of Oral Diseases, West China Hospital of Stomatology,
Sichuan University, Chengdu 610064, Sichuan, China.
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12
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Wu Z, Liang J, Huang W, Jiang L, Paul C, Lin B, Zheng J, Wang Y. Prompt Graft Cooling Enhances Cardioprotection during Heart Transplantation Procedures through the Regulation of Mitophagy. Cells 2021; 10:2912. [PMID: 34831135 PMCID: PMC8616468 DOI: 10.3390/cells10112912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/11/2021] [Accepted: 10/22/2021] [Indexed: 11/22/2022] Open
Abstract
A complete and prompt cardiac arrest using a cold cardioplegic solution is routinely used in heart transplantation to protect the graft function. However, warm ischemic time is still inevitable during the procedure to isolate donor hearts in the clinical setting. Our knowledge of the mechanism changes prevented by cold storage, and how warm ischemia damages donor hearts, is extremely poor. The potential consequences of this inevitable warm ischemic time to grafts, and the underlying potential protective mechanism of prompt graft cooling, have been studied in order to explore an advanced graft protection strategy. To this end, a surgical procedure, including 10-15 min warm ischemic time during procurement, was performed in mouse models to mimic the clinical situation (Group I), and compared to a group of mice that had the procurement performed with prompt cooling procedures (Group II). The myocardial morphologic changes (including ultrastructure) were then assessed by electron and optical microscopy after 6 h of cold preservation. Furthermore, syngeneic heart transplantation was performed after 6 h of cold preservation to measure the graft heart function. An electron microscopy showed extensive damage, including hypercontracted myofibers with contraction bands, and damaged mitochondria that released mitochondrial contents in Group I mice, while similar patterns of damage were not observed in the mice from Group II. The results from both the electron microscopy and immunoblotting verified that cardiac mitophagy (protective mitochondrial autophagy) was present in the mice from Group II, but was absent in the mice from Group I. Moreover, the mice from Group II demonstrated faster rebeating times and higher beating scores, as compared to the mice from Group I. The pressure catheter system results indicated that the graft heart function was significantly more improved in the mice from Group II than in those from Group I, as demonstrated by the left ventricle systolic pressure (31.96 ± 6.54 vs. 26.12 ± 8.87 mmHg), the +dp/dt (815.6 ± 215.4 vs. 693.9 ± 153.8 mmHg/s), and the -dp/dt: (492.4 ± 92.98 vs. 418.5 ± 118.9 mmHg/s). In conclusion, the warm ischemic time during the procedure impaired the graft function and destroyed the activation of mitophagy. Thus, appropriate mitophagy activation has emerged as a promising therapeutic target that may be essential for graft protection and functional improvement during heart transplantation.
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Affiliation(s)
- Zhichao Wu
- Department of Cardiovascular Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China;
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA; (J.L.); (W.H.); (L.J.); (C.P.); (B.L.)
| | - Jialiang Liang
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA; (J.L.); (W.H.); (L.J.); (C.P.); (B.L.)
| | - Wei Huang
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA; (J.L.); (W.H.); (L.J.); (C.P.); (B.L.)
| | - Lin Jiang
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA; (J.L.); (W.H.); (L.J.); (C.P.); (B.L.)
| | - Christian Paul
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA; (J.L.); (W.H.); (L.J.); (C.P.); (B.L.)
| | - Bonnie Lin
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA; (J.L.); (W.H.); (L.J.); (C.P.); (B.L.)
| | - Junmeng Zheng
- Department of Cardiovascular Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou 510120, China;
| | - Yigang Wang
- Department of Pathology and Laboratory Medicine, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA; (J.L.); (W.H.); (L.J.); (C.P.); (B.L.)
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13
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Li S, Khurshid M, Yao J, Zhang J, Dawuda MM, Hassan Z, Ahmad S, Xu B. Interaction of the causal agent of apricot bud gall Acalitus phloeocoptes (Nalepa) with apricot: Implications in infested tissues. PLoS One 2021; 16:e0250678. [PMID: 34473720 PMCID: PMC8412328 DOI: 10.1371/journal.pone.0250678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 08/11/2021] [Indexed: 11/19/2022] Open
Abstract
Apricot bud gall mite, Acalitus phloeocoptes (Nalepa), is a destructive arthropod pest that causes significant economic losses to apricot trees worldwide. The current study explores the ways to understand the mode of dispersal of A. phloeocoptes, the development and ultrastructure of apricot bud gall, and the role of phytohormones in the formation of the apricot bud galls. The results demonstrated that the starch granules in the bud axon were extended at the onset of the attack. During the later stages of the attack, the cytoplasm was found to deteriorate in infected tissues. Furthermore, we have observed that the accumulation of large amounts of cytokinin (zeatin, ZT) and auxin (indoleacetic acid, IAA) led to rapid bud proliferation during rapid growth period, while abscisic acid (ABA) controls the development of gall buds and plays a vital role in gall bud maturity. The reduction of gibberellic acid (GA3) content led to rapid lignification at the later phase of bud development. Overall, our results have revealed that the mechanism underlying the interaction of apricot bud gall with its parasite and have provided reliable information for designing valuable Apricot breeding programs. This study will be quite useful for pest management and will provide a comprehensive evaluation of ecology-based cost-effective control, life history and demographic parameters of A. phloeocoptes.
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Affiliation(s)
- Shijuan Li
- College of Plant Protection, Gansu Agricultural University, Lanzhou, China
| | - Muhammad Khurshid
- School of Biochemistry and Biotechnology, University of the Punjab, Lahore, Pakistan
| | - Junsheng Yao
- Gansu Agriculture Vocational and Technical College, Horticulture Technology, Lanzhou, Gansu, China
| | - Jin Zhang
- College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, Gansu, China
| | - Mohammed Mujitaba Dawuda
- College of Horticulture, Gansu Agricultural University, Lanzhou, Gansu, China
- Department of Horticulture, FoA, University for Development Studies, Tamale, Ghana
| | - Zeshan Hassan
- College of Agriculture, Bahauddin Zakariya University, Multan, Bahadur Sub Campus Layyah, Pakistan
| | - Shahbaz Ahmad
- Institute of Agricultural Sciences, University of the Punjab, Lahore, Pakistan
| | - Bingliang Xu
- College of Plant Protection, Gansu Agricultural University, Lanzhou, China
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14
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Chen G, Xu Y, Yao Y, Cao Y, Liu Y, Chai H, Chen W, Chen X. IKKε knockout alleviates angiotensin II-induced apoptosis and excessive autophagy in vascular smooth muscle cells by regulating the ERK1/2 pathway. Exp Ther Med 2021; 22:1051. [PMID: 34434265 PMCID: PMC8353624 DOI: 10.3892/etm.2021.10485] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2020] [Accepted: 06/18/2021] [Indexed: 12/21/2022] Open
Abstract
Inhibitor of nuclear factor-κB kinase subunit ε (IKKε) is an important signal regulator in the formation of abdominal aortic aneurysm (AAA). However, the underlying mechanism remains to be elucidated. Therefore, the present study aimed to investigate the mechanism underlying IKKε function in AAA formation by studying apoptosis and autophagy in angiotensin II (Ang II)-induced vascular smooth muscle cells (VSMCs). AngII was used to stimulate VSMCs for 24 h to simulate the process of AAA formation. VSMCs were transfected with IKKε small interfering RNA to investigate the effect of IKKε on AAA formation, cell apoptosis and autophagy. IKKε deficiency led to reduced mitochondrial damage and apoptosis in VSMCs in the early stage of apoptosis in vitro, as demonstrated using a JC-1 probe. IKKε deficiency also reduced autophagy and decreased the formation of autophagic vacuoles in VSMCs, demonstrated using transmission electron microscopy. The decrease in apoptosis caused by IKKε knockdown was reversed when the autophagic flow was blocked using bafilomycin A1. Western blot analysis further revealed that IKKε deficiency negatively regulated the ERK1/2 signaling pathway to reduce autophagy. Collectively, the results of the present study revealed that IKKε played a key role in apoptosis by inducing excessive autophagy, thereby potentially contributing to AAA formation. These findings further revealed the mechanism underlying IKKε function in the formation of AAA.
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Affiliation(s)
- Ganyi Chen
- Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
| | - Yueyue Xu
- Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
| | - Yiwei Yao
- Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
| | - Yide Cao
- Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
| | - Yafeng Liu
- Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
| | - Hao Chai
- Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
| | - Wen Chen
- Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
| | - Xin Chen
- Department of Thoracic and Cardiovascular Surgery, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210006, P.R. China
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15
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Krzystek TJ, Banerjee R, Thurston L, Huang J, Swinter K, Rahman SN, Falzone TL, Gunawardena S. Differential mitochondrial roles for α-synuclein in DRP1-dependent fission and PINK1/Parkin-mediated oxidation. Cell Death Dis 2021; 12:796. [PMID: 34404758 PMCID: PMC8371151 DOI: 10.1038/s41419-021-04046-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 07/18/2021] [Accepted: 07/19/2021] [Indexed: 01/18/2023]
Abstract
Mitochondria are highly dynamic organelles with strict quality control processes that maintain cellular homeostasis. Within axons, coordinated cycles of fission-fusion mediated by dynamin related GTPase protein (DRP1) and mitofusins (MFN), together with regulated motility of healthy mitochondria anterogradely and damaged/oxidized mitochondria retrogradely, control mitochondrial shape, distribution and size. Disruption of this tight regulation has been linked to aberrant oxidative stress and mitochondrial dysfunction causing mitochondrial disease and neurodegeneration. Although pharmacological induction of Parkinson's disease (PD) in humans/animals with toxins or in mice overexpressing α-synuclein (α-syn) exhibited mitochondrial dysfunction and oxidative stress, mice lacking α-syn showed resistance to mitochondrial toxins; yet, how α-syn influences mitochondrial dynamics and turnover is unclear. Here, we isolate the mechanistic role of α-syn in mitochondrial homeostasis in vivo in a humanized Drosophila model of Parkinson's disease (PD). We show that excess α-syn causes fragmented mitochondria, which persists with either truncation of the C-terminus (α-syn1-120) or deletion of the NAC region (α-synΔNAC). Using in vivo oxidation reporters Mito-roGFP2-ORP1/GRX1 and MitoTimer, we found that α-syn-mediated fragments were oxidized/damaged, but α-syn1-120-induced fragments were healthy, suggesting that the C-terminus is required for oxidation. α-syn-mediated oxidized fragments showed biased retrograde motility, but α-syn1-120-mediated healthy fragments did not, demonstrating that the C-terminus likely mediates the retrograde motility of oxidized mitochondria. Depletion/inhibition or excess DRP1-rescued α-syn-mediated fragmentation, oxidation, and the biased retrograde motility, indicating that DRP1-mediated fragmentation is likely upstream of oxidation and motility changes. Further, excess PINK/Parkin, two PD-associated proteins that function to coordinate mitochondrial turnover via induction of selective mitophagy, rescued α-syn-mediated membrane depolarization, oxidation and cell death in a C-terminus-dependent manner, suggesting a functional interaction between α-syn and PINK/Parkin. Taken together, our findings identify distinct roles for α-syn in mitochondrial homeostasis, highlighting a previously unknown pathogenic pathway for the initiation of PD.
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Affiliation(s)
- Thomas J Krzystek
- Department of Biological Sciences, The State University of New York at Buffalo, Buffalo, NY, 14260, USA
| | - Rupkatha Banerjee
- Department of Biological Sciences, The State University of New York at Buffalo, Buffalo, NY, 14260, USA
| | - Layne Thurston
- Department of Biological Sciences, The State University of New York at Buffalo, Buffalo, NY, 14260, USA
| | - JianQiao Huang
- Department of Biological Sciences, The State University of New York at Buffalo, Buffalo, NY, 14260, USA
| | - Kelsey Swinter
- Department of Biological Sciences, The State University of New York at Buffalo, Buffalo, NY, 14260, USA
| | - Saad Navid Rahman
- Department of Biological Sciences, The State University of New York at Buffalo, Buffalo, NY, 14260, USA
| | - Tomas L Falzone
- Instituto de Biología Celular y Neurociencias IBCN (CONICET-UBA), Universidad De Buenos Aires, Buenos Aires, Argentina.,Instituto de Investigación en Biomedicina de Buenos Aires (IBioBA), Partner Institute of the Max Planck Society, Buenos Aires, Argentina
| | - Shermali Gunawardena
- Department of Biological Sciences, The State University of New York at Buffalo, Buffalo, NY, 14260, USA.
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16
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Winzinger EP, Jandikova H, Haase M, Knauerhase A, Winzinger T, Schott M, Willenberg HS. DHEAS and Differential Blood Counts as Indirect Signs of Glucocorticoid Excess in Adrenal Non-Producing Adenomas. Horm Metab Res 2021; 53:512-519. [PMID: 34384108 DOI: 10.1055/a-1539-6442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The majority of incidentally discovered adrenal tumors are later characterized as non-producing adrenocortical adenomas (NPA). We asked whether laboratory abnormalities in parameters that reflect glucocorticoid action can be found in patients with NPA despite their nature of being clinically unapparent. Since glucocorticoids are potent immunosuppressants we studied blood counts and differential blood counts along with corticotropin and dehydroepiandrostenedione sulfate (DHEAS) blood concentrations, as well as cortisol values before and after an overnight 1 mg dexamethasone suppression test. We compared the results of normal individuals, of patients with adrenal adenomas and normal hormone profiles and with subclinical autonomous glucocorticoid hypersecretion, as well as overt cortisol excess. We found that almost all indices of the blood counts were significantly different between the patients groups. In particular, patients with adrenal non-producing adenomas already showed signs of glucocorticoid excess, including relative lymphocytopenia, lowered DHEAS, and ACTH concentrations than control individuals. We also found that the extent of lymphocytopenia correlated with the concentrations of DHEAS and ACTH, and DHEAS correlated well with ACTH. We conclude that the basal ACTH and DHEAS values along with the differential blood counts give good information on the extent of glucocorticoid excess and that silent adrenal adenomas seem to oversecrete glucocorticoids at concentrations that already alter these parameters.
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Affiliation(s)
- Eliza P Winzinger
- Division of Endocrinology and Metabolism, Rostock University Medical Center, Rostock, Germany
| | - Hana Jandikova
- Third Department of Medicine - Clinic of Endocrinology and Metabolism, Charles University First Faculty of Medicine, Prague, Czech Republic
- Division for Specific Endocrinology, University Hospital Dusseldorf, Medical Faculty HHU Dusseldorf, Dusseldorf, Germany
| | - Matthias Haase
- Division for Specific Endocrinology, University Hospital Dusseldorf, Medical Faculty HHU Dusseldorf, Dusseldorf, Germany
| | - Andreas Knauerhase
- Division of Endocrinology and Metabolism, Rostock University Medical Center, Rostock, Germany
| | - Tudor Winzinger
- Division of Endocrinology and Metabolism, Rostock University Medical Center, Rostock, Germany
| | - Matthias Schott
- Division for Specific Endocrinology, University Hospital Dusseldorf, Medical Faculty HHU Dusseldorf, Dusseldorf, Germany
| | - Holger S Willenberg
- Division of Endocrinology and Metabolism, Rostock University Medical Center, Rostock, Germany
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17
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Wu D, Lu J, Ma Y, Cao Y, Zhang T. Mitochondrial dynamics and mitophagy involved in MPA-capped CdTe quantum dots-induced toxicity in the human liver carcinoma (HepG2) cell line. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 274:115681. [PMID: 33308872 DOI: 10.1016/j.envpol.2020.115681] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 09/14/2020] [Accepted: 09/15/2020] [Indexed: 06/12/2023]
Abstract
Quantum dots (QDs) are nanoparticles of inorganic semiconductors and have great promise in various applications. Many studies have indicated that mitochondria are the main organelles for the distribution and toxic effects of QDs. However, the underlying mechanism of QDs interacting with mitochondria and affecting their function is unknown. Here, we report the mechanism of toxic effects of 3-mercaptopropionic acid (MPA)-capped CdTe QDs on mitochondria. Human liver carcinoma (HepG2) cells were exposed to 25, 50 and 100 μmol/L of MPA-capped CdTe QDs. The results indicated that MPA-capped CdTe QDs inhibited HepG2 cell proliferation and increased the extracellular release of LDH in a concentration-dependent manner. Furthermore, MPA-capped CdTe QDs caused reactive oxygen species (ROS) generation and cell damage through intrinsic apoptotic pathway. MPA-capped CdTe QDs can also lead to the destruction of mitochondrial cristae, elevation of intracellular Ca2+ levels, decreased mitochondrial transmembrane potential and ATP production. Finally, we showed that MPA-capped CdTe QDs inhibited mitochondrial fission, mitochondrial inner membrane fusion and mitophagy. Taken together, MPA-capped CdTe QDs induced significant mitochondrial dysfunction, which may be caused by imbalanced mitochondrial fission/fusion and mitophagy inhibition. These findings provide insights into the regulatory mechanisms involved in MPA-capped CdTe QDs-induced mitochondrial dysfunction.
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Affiliation(s)
- Daming Wu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University and Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing, 210009, China
| | - Jie Lu
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University and Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing, 210009, China
| | - Ying Ma
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University and Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing, 210009, China
| | - Yuna Cao
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University and Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing, 210009, China
| | - Ting Zhang
- Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University and Jiangsu Key Laboratory for Biomaterials and Devices, Southeast University, Nanjing, 210009, China.
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18
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Lou H, Li H, Wei T, Chen Q. Stimulatory Effects of Oleci Acid and Fungal Elicitor on Betulinic Acid Production by Submerged Cultivation of Medicinal Mushroom Inonotus obliquus. J Fungi (Basel) 2021; 7:jof7040266. [PMID: 33807450 PMCID: PMC8066064 DOI: 10.3390/jof7040266] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 03/28/2021] [Accepted: 03/29/2021] [Indexed: 12/28/2022] Open
Abstract
To evaluate the novel strategy of oleic acid and fungal elicitor (made from Aspergillus niger) to elicit betulinic acid biosynthesis in medicinal mushroom Inonotus obliquus, we conduct the stimulatory effects investigation for synthesizing betulinic acid from betulin. HPLC results indicated oleic acid and fungal elicitor were effective stimulators. The supplementation of 1.0 g/L oleic acid led to the highest increase of betulinic acid either in dry mycelia or fermentation broth by 2-fold of the control. Fungal elicitor at 45 mg/L markedly increases mycelia growth by 146.0% and enhance intracellular betulinic acid accumulation by 429.5% as compared to the controls. Quantification of transcription levels determined that oleic acid, fungal elicitor and their combinations could induce the expressions of key genes involved in betulinic acid biosynthesis, such as HMG-CoA reductase and squalene synthase. These findings indicated that oleic acid and fungal elicitor could enhance betulinic acid metabolism by up-regulating key genes expression.
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Affiliation(s)
| | | | | | - Qihe Chen
- Correspondence: ; Tel.: +86-0571-86984316
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19
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Rajput IR, Yaqoob S, Yajing S, Sanganyado E, Wenhua L. Polybrominated diphenyl ethers exert genotoxic effects in pantropic spotted dolphin fibroblast cell lines. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 271:116131. [PMID: 33412449 DOI: 10.1016/j.envpol.2020.116131] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 11/15/2020] [Accepted: 11/17/2020] [Indexed: 06/12/2023]
Abstract
Cetaceans accumulate persistent and toxic substances such as polybrominated diphenyl ethers in their tissue. PBDEs are ubiquitous in marine environments, and their exposure to mammals is linked to numerous health effects such as endocrine disruption, neurotoxicity, carcinogenicity, and fetal toxicity. However, the toxicological effects and mechanism of toxicity in cetaceans remains poorly understood. The effects of BDE-47 (0.1-0.5 μg mL-1), BDE-100 (0.1-0.5 μg mL-1), and BDE-209 (0.25-1.0 μg mL-1) exposure on cell viability, oxidative stress, mitochondrial structure, and apoptosis were evaluated using a recently established pantropical spotted dolphin (Stenella attenuata) skin fibroblast cell line (PSD-LWHT) as an in vitro model. However, the production of reactive oxygen species (ROS) increased following exposure to 1.0 μg mL-1 PBDE while superoxide anion, hydroxyl radicals, and inducible nitric oxide increased in a dose-dependent manner. At 0.5-1.0 μg mL-1, PBDEs significantly reduced the mitochondrial membrane potential. In addition, exposure to BDE-47 and -209 significantly affected mitochondrial structure as well as cell signaling and transduction compared to BDE-100. Although PBDE exposure did not affect cell viability, a significant increase in cell apoptosis markers (Bcl2 and caspase-9) was observed. This study demonstrated that BDE-47, -100, and -209 congeners might cause cytotoxic and genotoxic effects as they play a crucial role in the dysregulation of oxidative stress and alteration of mitochondrial and cell membrane structure and activity in the fibroblast cells. Hence, these results suggest that PBDEs might have adverse health effects on cetaceans inhabiting contaminated marine environments.
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Affiliation(s)
- Imran Rashid Rajput
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Science, Shantou University, Shantou, Guangdong, 515063, China; Faculty of Veterinary and Animal Sciences, Lasbela University of Agriculture, Water and Marine Sciences, Uthal, Balochistan, Pakistan
| | - Summra Yaqoob
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Science, Shantou University, Shantou, Guangdong, 515063, China
| | - Sun Yajing
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Science, Shantou University, Shantou, Guangdong, 515063, China
| | - Edmond Sanganyado
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Science, Shantou University, Shantou, Guangdong, 515063, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China
| | - Liu Wenhua
- Guangdong Provincial Key Laboratory of Marine Biotechnology, Institute of Marine Science, Shantou University, Shantou, Guangdong, 515063, China; Southern Marine Science and Engineering Guangdong Laboratory, Guangzhou, 511458, China.
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Raposo LR, Silva A, Silva D, Roma-Rodrigues C, Espadinha M, Baptista PV, Santos MM, Fernandes AR. Exploiting the antiproliferative potential of spiropyrazoline oxindoles in a human ovarian cancer cell line. Bioorg Med Chem 2021; 30:115880. [DOI: 10.1016/j.bmc.2020.115880] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 11/10/2020] [Accepted: 11/13/2020] [Indexed: 12/28/2022]
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Rana K, Verma Y, Rana SVS. Possible Mechanisms of Liver Injury Induced by Cadmium Sulfide Nanoparticles in Rat. Biol Trace Elem Res 2021; 199:216-226. [PMID: 32342341 DOI: 10.1007/s12011-020-02128-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 03/20/2020] [Indexed: 12/27/2022]
Abstract
Cadmium is primarily utilized in the construction of particles known as quantum dots. Hepatotoxicity caused by microparticles of cadmium is very well known; however, toxicity of nanoparticles of cadmium is not well understood. The present study describes the toxicity of cadmium sulfide nanoparticles (CdSNPs) in the liver of rat. Adult Wistar rats were administered CdSNPs (10 mg/kg) on alternate days for 45 days. Serum enzymes (ALT, AST, ALP), biomarkers of lipid peroxidation (MDA, H2O2, and NO), and metallothionein concentration were determined. Histopathological and TEM observations were also made to record morphological changes. CdSNPs (10 mg/kg) induced significant changes in the structure and function of liver. Values of serum enzymes and reactive species increased significantly in rats treated with CdSNPs in comparison to CdS-treated rats. Histopathological observations showed extensive parenchymal degeneration. Ultrastructural studies exhibited proliferation of endoplasmic reticulum, microsomes, and lysosomes. It is concluded that NP-membrane interaction leads to the generation of reactive species that alter membrane integrity and induce oxidative stress. These events may activate cell death pathways in hepatocytes.
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Affiliation(s)
- Kavita Rana
- Department of Toxicology, Choudhary Charan Singh University, Meerut, UP, 250004, India
| | - Yeshvandra Verma
- Department of Toxicology, Choudhary Charan Singh University, Meerut, UP, 250004, India
| | - S V S Rana
- Department of Toxicology, Choudhary Charan Singh University, Meerut, UP, 250004, India.
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Yu H, Li ZQ, Ou-Yang YY, Huang GH. Identification of four caspase genes from Spodoptera exigua (Lepidoptera: Noctuidae) and their regulations toward different apoptotic stimulations. INSECT SCIENCE 2020; 27:1158-1172. [PMID: 31793737 DOI: 10.1111/1744-7917.12741] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Revised: 11/09/2019] [Accepted: 11/20/2019] [Indexed: 06/10/2023]
Abstract
Apoptosis plays critical roles in multiple biological processes in multicellular organisms. Caspases are known as important participators and regulators of apoptosis. Here, four novel caspase genes of Spodoptera exigua were cloned and characterized, which were designated as SeCasp-1, SeCasp-6, SeCasp-7 and SeCasp-8. Analysis of the putative encoded protein sequences of these SeCasps indicated that SeCasp-1 and SeCasp-7 were possible homologs of executor caspases; SeCasp-8 was a possible homolog of initiator caspases; and SeCasp-6 was a unique caspase of S. exigua that shares low similarity with all the identified insect caspases. Based on baculovirus expression system analyses, SeCasp-1 exhibited similar caspase activity to human caspase-1, -3, -4, -6, -8 and -9; SeCasp-6 presented similar caspase activity to human caspase-2, -3, -4, -6, -8 and -9; SeCasp-7 exhibited similar caspase activity to human caspase-2, -3 and -6; and SeCasp-8 presented similar caspase activity only to human caspase-8. Induction with different chemicals revealed that SeCasp-1 showed extreme upregulation after 24 h in the treated fat body cell line (IOZCAS-Spex-II) of S. exigua. Developmental expression analysis revealed that SeCasp-1 was highly transcribed in the larval stages, while SeCasp-6, SeCasp-7, SeCasp-8 were down-regulated. The in vivo detection of the relative expression levels of SeCasps in S. eixgua larvae inoculated with different pathogens suggested that SeCasp-1 was sensitive to Bacillus thuringiensis infection and that SeCasp-6 was sensitive to baculovirus infection. SeCasp-7 and SeCasp-8 showed slight changes under either in vitro chemical apoptosis induction or in vivo pathogen infection.
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Affiliation(s)
- Huan Yu
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Zi-Qi Li
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Yi-Yi Ou-Yang
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
- College of Plant Protection, Hunan Agricultural University, Changsha, China
| | - Guo-Hua Huang
- Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Changsha, China
- College of Plant Protection, Hunan Agricultural University, Changsha, China
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Petit PX, Ardilla-Osorio H, Penalvia L, Nathan E. R. Tafazzin Mutation Affecting Cardiolipin Leads to Increased Mitochondrial Superoxide Anions and Mitophagy Inhibition in Barth Syndrome. Cells 2020; 9:cells9102333. [PMID: 33096711 PMCID: PMC7589545 DOI: 10.3390/cells9102333] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/19/2020] [Accepted: 10/20/2020] [Indexed: 01/01/2023] Open
Abstract
Tafazzin is a phospholipid transacylase that catalyzes the remodeling of cardiolipin, a mitochondrial phospholipid required for oxidative phosphorylation. Mutations of the tafazzin gene cause Barth syndrome, which is characterized by mitochondrial dysfunction and dilated cardiomyopathy, leading to premature death. However, the molecular mechanisms underlying the cause of mitochondrial dysfunction in Barth syndrome remain poorly understood. We again highlight the fact that the tafazzin deficiency is also linked to defective oxidative phosphorylation associated with oxidative stress. All the mitochondrial events are positioned in a context where mitophagy is a key element in mitochondrial quality control. Here, we investigated the role of tafazzin in mitochondrial homeostasis dysregulation and mitophagy alteration. Using a HeLa cell model of tafazzin deficiency, we show that dysregulation of tafazzin in HeLa cells induces alteration of mitophagy. Our findings provide some additional insights into mitochondrial dysfunction associated with Barth syndrome, but also show that mitophagy inhibition is concomitant with apoptosis dysfunction through the inability of abnormal mitochondrial cardiolipin to assume its role in cytoplasmic signal transduction. Our work raises hope that pharmacological manipulation of the mitophagic pathway together with mitochondrially targeted antioxidants may provide new insights leading to promising treatment for these highly lethal conditions.
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Affiliation(s)
- Patrice X. Petit
- SSPIN Saints-Pères Paris Institut de Neurosciences, CNRS UMR 8003, “Mitochondria, Apoptosis and Autophagy Signalling” Université de Paris—Campus Saint-Germain, 45 rue des Saints-Pères, 75006 Paris, France; (L.P.); (R.N.E.)
- Correspondence: or ; Tel.: +33(0)6-78-24-80-87
| | - Hector Ardilla-Osorio
- Laboratoire Cellules Souches et Prions, INSERM-S 1124, Université de Paris—Campus Saint-Germain, 45 rue des Saints Pères, 75006 Paris, France;
| | - Lucile Penalvia
- SSPIN Saints-Pères Paris Institut de Neurosciences, CNRS UMR 8003, “Mitochondria, Apoptosis and Autophagy Signalling” Université de Paris—Campus Saint-Germain, 45 rue des Saints-Pères, 75006 Paris, France; (L.P.); (R.N.E.)
| | - Rainey Nathan E.
- SSPIN Saints-Pères Paris Institut de Neurosciences, CNRS UMR 8003, “Mitochondria, Apoptosis and Autophagy Signalling” Université de Paris—Campus Saint-Germain, 45 rue des Saints-Pères, 75006 Paris, France; (L.P.); (R.N.E.)
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Cinnamaldehyde induces endogenous apoptosis of the prostate cancer-associated fibroblasts via interfering the Glutathione-associated mitochondria function. Med Oncol 2020; 37:91. [DOI: 10.1007/s12032-020-01417-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Accepted: 09/04/2020] [Indexed: 01/03/2023]
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Natarajan U, Venkatesan T, Dhandayuthapani S, Dondapatti P, Rathinavelu A. Differential mechanisms involved in RG-7388 and Nutlin-3 induced cell death in SJSA-1 osteosarcoma cells. Cell Signal 2020; 75:109742. [PMID: 32827690 DOI: 10.1016/j.cellsig.2020.109742] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/14/2020] [Accepted: 08/17/2020] [Indexed: 11/17/2022]
Abstract
Targeted therapy is becoming the mainstay of cancer treatment due to reduced side effects and enhanced tumor attack. In the last few decades, Murine Double Minute 2 (MDM2) protein has become one of the targets for developing cancer therapies. Blocking MDM2-p53 interaction has long been considered to offer a broad range of advantages during cancer treatment. In this study, we are reporting the differential mechanism of cell death induced by the two small-molecule inhibitors, named RG-7388 and Nutlin-3, that are specific for MDM2 in SJSA-1 Osteosarcoma cells (OS). Mechanistically, RG-7388 was able to enhance the phosphorylation of Mcl-1, which appears to significantly enhance its degradation, thereby relieving the pro-apoptotic protein Bak to execute the apoptosis mechanism. It was noted that the untreated SJSA-1 cells showed an accumulation of Mcl-1 levels, which was decreased following RG-7388 and to a lesser extent by Nutlin-3 and GSK-3β (glycogen synthase kinase 3β) inhibitor treatments. Additionally, we noted that CHIR-99021 (GSK-3β inhibitor) blocked the cytotoxicity exerted by RG-7388 on SJSA-1 cells by decreasing Bak levels. Since Bak is an important pro-apoptotic protein, we hypothesized that phosphorylation of Mcl-1 by GSK-3β could negatively impact the Mcl-1/Bak dimerization and relieve Bak to trigger the loss of mitochondrial membrane potential and thereby initiates apoptosis. We also observed that inhibition of GSK-3β mediated reduction in Bak levels had a protective effect on the mitochondrial membrane integrity, and thus, caused a significant inhibition of the caspase-3 activity and PARP cleavage. Nutlin-3, on the other hand, appears to increase the levels of Bax, leading to the inactivation of Bcl-2, consequently loss of mitochondrial membrane potential and release of Cytochrome c (Cyt c) and elevation of Apaf-1 triggering apoptosis. Thus, to the best of our knowledge, this is the first study that delineates the differences in the molecular mechanism involving two MDM2 inhibitors triggering apoptosis through parallel pathways in SJSA-1 cells. This study further opens new avenues for the use of RG-7388 in treating osteosarcomas that often becomes resistant to chemotherapy due to Bcl-2 overexpression.
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Affiliation(s)
- Umamaheswari Natarajan
- Rumbaugh-Goodwin Institute for Cancer Research, Nova Southeastern University, Ft. Lauderdale, FL 33314, USA
| | - Thiagarajan Venkatesan
- Rumbaugh-Goodwin Institute for Cancer Research, Nova Southeastern University, Ft. Lauderdale, FL 33314, USA
| | - Sivanesan Dhandayuthapani
- Rumbaugh-Goodwin Institute for Cancer Research, Nova Southeastern University, Ft. Lauderdale, FL 33314, USA
| | - Priya Dondapatti
- Rumbaugh-Goodwin Institute for Cancer Research, Nova Southeastern University, Ft. Lauderdale, FL 33314, USA
| | - Appu Rathinavelu
- Rumbaugh-Goodwin Institute for Cancer Research, Nova Southeastern University, Ft. Lauderdale, FL 33314, USA; College of Pharmacy, Health Professions Division, Nova Southeastern University, Ft. Lauderdale, FL 33314, USA.
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Gu Z, Li M, Xia S, Mao T, Lu Z, Chen J, Wang H, Qu J, Fang Y, Li F, Li B. Effects of sublethal phoxim exposure and lower food intake on nutrient metabolism in the midguts of Bombyx mori. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 167:104593. [PMID: 32527421 DOI: 10.1016/j.pestbp.2020.104593] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2019] [Revised: 04/04/2020] [Accepted: 04/20/2020] [Indexed: 06/11/2023]
Abstract
Silkworm (Bombyx mori) is an economically important insect. However, the survival of silkworms has been significantly affected by the assault of chemical pesticides on mulberry trees through aerial application and water currents. Phoxim is a broad-spectrum organophosphorus insecticide widely used in China. Currently, very little is known about the non-neuronal effects of sublethal exposure to phoxim. The purpose of this study was to investigate the non-neuronal effects of sublethal phoxim exposure in the silkworm midgut, with a focus on nutrient metabolism. After phoxim treatment, lipase activity in the silkworm was shown to be up-regulated at 24 h before a decreasing trend was seen. Meanwhile, α-amylase activity showed the opposite trend. The expression levels of mitochondrial respiratory chain-related genes were all up-regulated at 24 h before falling continuously. To ensure that the effects of phoxim on nutrient metabolism were not simply a consequence of a decrease in mulberry consumption, the silkworms were treated with a reduced-food diet before the digestive enzyme activities and the transcription levels of mitochondrial respiratory chain-related genes were analyzed. Our results showed that the patterns in the reduced-diet and phoxim-exposed silkworm were markedly different, suggesting the alterations in the phoxim-exposed silkworm cannot readily be explained by nutrient deprivation.
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Affiliation(s)
- Zhiya Gu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Mengxue Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Shuixiu Xia
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Tingting Mao
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Zhengting Lu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Jian Chen
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Hui Wang
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Jianwei Qu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Yilong Fang
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Fanchi Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Bing Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China; Sericulture Institute of Soochow University, Soochow University, Suzhou, Jiangsu 215123, PR China.
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Shi S, Zheng G, Yang C, Chen X, Yan Q, Jiang F, Jiang X, Xin Y, Jiang G. Effects of Vitamin K3 Combined with UVB on the Proliferation and Apoptosis of Cutaneous Squamous Cell Carcinoma A431 Cells. Onco Targets Ther 2020; 12:11715-11727. [PMID: 32099380 PMCID: PMC6997229 DOI: 10.2147/ott.s228792] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 12/17/2019] [Indexed: 12/29/2022] Open
Abstract
Purpose Cutaneous squamous cell carcinoma (cSCC) is the second most common form of skin cancer and its incidence continues to rise yearly. Photodynamic therapy (PDT) is a non-invasive form of cancer therapy, which utilizes the combined action of a photosensitizer, light, and oxygen molecules to selectively cause cellular damage to tumor cells. Vitamin K3 (VitK3) has been shown to induce apoptosis and inhibit the growth of tumor cells in humans. The purpose of this study was to determine the effect of VitK3 and ultraviolet radiation B (UVB) on oxidative damage, proliferation and apoptosis of A431 cells. Methods CCK-8 assay was used to detect cell proliferation; Hoechst staining, TUNEL assay and flow cytometry analysis were used to detect apoptosis. Western Blot was perfomed to measure the expression of apoptosis-related proteins. Flow cytometry analysis was employed to detect the reactive oxygen species (ROS) levels and mitochondrial membrane potential. Finally, the role of VitK3 in combination with UVB on the proliferation and apoptosis of A431 cells was investigated using mice xenograft models. Results We found that the co-treatment of VitK3 combined with UVB more significantly inhibited the growth and proliferation of A431 cells than either VitK3 or UVB alone. Hoechst 33258 staining and flow cytometry analysis revealed that apoptosis was more pronounced in the VitK3-UVB group compared to the VitK3 and UVB groups. Moreover, flow cytometry analysis showed that ROS and the depolarization of the mitochondrial membrane potential were higher in all the co-treatment groups compared to the control, VitK3, and UVB groups. The VitK3-UVB group exhibited a significantly lower tumor growth rate in mouse xenograft models. Conclusion This study reveals that VitK3 combined with UVB inhibits the growth and induces apoptosis of A431 cells in vitro and suppresses tumor growth and promotes apoptosis of cSCC in vivo.
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Affiliation(s)
- Shangyuchen Shi
- Department of Radiotherapy, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, People's Republic of China
| | - Gang Zheng
- Department of Dermatology, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, People's Republic of China.,Department of Dermatology, Xuzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Huai'an 221003, People's Republic of China
| | - Chunsheng Yang
- The Affiliated Huai'an Hospital of Xuzhou Medical University, The Second People's Hospital of Huai'an, Huai'an 223002, People's Republic of China
| | - Xi Chen
- Department of Dermatology, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, People's Republic of China
| | - Qiuyue Yan
- Department of Radiotherapy, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, People's Republic of China
| | - Fan Jiang
- Department of Radiotherapy, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, People's Republic of China
| | - Xiaojie Jiang
- Department of Radiotherapy, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, People's Republic of China
| | - Yong Xin
- Department of Radiotherapy, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, People's Republic of China
| | - Guan Jiang
- Department of Dermatology, Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, People's Republic of China
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Highlighting Curcumin-Induced Crosstalk between Autophagy and Apoptosis as Supported by Its Specific Subcellular Localization. Cells 2020; 9:cells9020361. [PMID: 32033136 PMCID: PMC7072416 DOI: 10.3390/cells9020361] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 01/08/2020] [Accepted: 01/15/2020] [Indexed: 12/31/2022] Open
Abstract
Curcumin, a major active component of turmeric (Curcuma longa, L.), is known to have various effects on both healthy and cancerous tissues. In vitro studies suggest that curcumin inhibits cancer cell growth by activating apoptosis, but the mechanism underlying the anticancer effect of curcumin is still unclear. Since there is a recent consensus about endoplasmic reticulum (ER) stress being involved in the cytotoxicity of natural compounds, we have investigated using Image flow cytometry the mechanistic aspects of curcumin's destabilization of the ER, but also the status of the lysosomal compartment. Curcumin induces ER stress, thereby causing an unfolded protein response and calcium release, which destabilizes the mitochondrial compartment and induce apoptosis. These events are also associated with secondary lysosomal membrane permeabilization that occurs later together with an activation of caspase-8, mediated by cathepsins and calpains that ended in the disruption of mitochondrial homeostasis. These two pathways of different intensities and momentum converge towards an amplification of cell death. In the present study, curcumin-induced autophagy failed to rescue all cells that underwent type II cell death following initial autophagic processes. However, a small number of cells were rescued (successful autophagy) to give rise to a novel proliferation phase.
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Dietary High Sodium Fluoride Impairs Digestion and Absorption Ability, Mucosal Immunity, and Alters Cecum Microbial Community of Laying Hens. Animals (Basel) 2020; 10:ani10020179. [PMID: 31973036 PMCID: PMC7070338 DOI: 10.3390/ani10020179] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 12/12/2022] Open
Abstract
(1) Background: This study was conducted to investigate the effects of dietary fluoride (F) on tissue retention, digestive enzymes activities, mucosal immunity, and cecum microbial community of laying hens. (2) Methods: Total of 288 37-week-old Hy-Line Gray laying hens with similar laying rate (85.16% ± 3.87%) were adapted to the basal diets for ten days, and then allocated into three groups at random (n = 9, 6, 6 replicates/group). The concentrations of F in the diets were 31.19 (the control group, CON), 431.38 (F400, low-F group) and 1237.16 mg/kg (F1200, high-F group), respectively. The trial lasted for 59 days. (3) Results: Results suggested that F residuals in duodenum responded to dietary F concentrations positively. The activities of amylase, maltase and lactase were decreased in high-F group, compared with those in the control group. The mRNA expression levels of jejunum and ileum secretory immunoglobulin A (sIgA) and Mucin 2, and sIgA concentrations were decreased inhigh-F group, than those in the control group. The observed operational taxonomic units (OTUs) of laying hens in high-F group were higher than the CON and low-F groups, and the bacterial structure was different from the other two groups. The Lactobacillus was higher in the control group, while Gammaproteobacteria, Escherichia-Shigella, Streptococcaceae, and Enterobacteriaceae were higher in the high-F group. (4) Conclusions: The actual results confirmed that dietary high F intake increased the F residuals in duodenum, and reduced the digestion and absorption of nutrients and immunity via decreasing the activities of digestive enzymes, impairing intestine mucosal immunity, and disturbing the cecum microbial homeostasis of laying hens.
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Enhancement of Quercetin-Induced Apoptosis by Cotreatment with Autophagy Inhibitor Is Associated with Augmentation of BAK-Dependent Mitochondrial Pathway in Jurkat T Cells. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:7989276. [PMID: 31827702 PMCID: PMC6885204 DOI: 10.1155/2019/7989276] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 07/17/2019] [Accepted: 09/04/2019] [Indexed: 12/15/2022]
Abstract
A flavonoid antioxidant quercetin promotes dose-dependent activation of the ATM-CHK-p53 pathway, downregulation of antiapoptotic survivin, and upregulation of proapoptotic NOXA in human T cell acute lymphoblastic leukemia Jurkat clones (J/Neo and J/BCL-XL). However, the downregulation of antiapoptotic BAG3 and MCL-1 occurred in J/Neo cells but not in J/BCL-XL cells overexpressing BCL-XL. Additionally, several BCL-XL-sensitive intrinsic mitochondrial apoptotic events including apoptotic sub-G1 cell accumulation, TUNEL-positive DNA fragmentation, BAK activation, mitochondrial membrane potential (Δψm) loss, caspase-9/caspase-8/caspase-3 activation, and PARP cleavage were induced only in J/Neo cells. Both cytosolic and mitochondrial ROS levels were elevated in quercetin-treated J/Neo cells; however, the ROS elevations were almost completely abrogated in J/BCL-XL cells, suggesting the ROS elevations were downstream of BCL-XL-sensitive mitochondrial damage and dysfunction. Wild-type A3, FADD-deficient I2.1, and caspase-8-deficient I9.2 Jurkat clones exhibited similar susceptibilities to the cytotoxicity of quercetin, excluding an involvement of extrinsic pathway in triggering the apoptosis. The autophagic events such as attenuation of AKT-mTOR pathway, formation of acridine orange-stainable acidic vesicular organelles, conversion of microtubule-associated protein 1 light chain 3-I (LC3-I) to LC3-II, and downregulation of p62/SQSTM1 level were detected in quercetin-treated J/Neo and J/BCL-XL cells, regardless of BCL-XL overexpression. Cotreatment with the autophagy inhibitor (3-methyladenine, LY294002, or chloroquine) resulted in a significant enhancement of quercetin-induced BAK activation and subsequently the mitochondrial damage-mediated apoptosis pathway by augmenting the downregulation of BAG3 and MCL-1 levels in J/Neo cells. These results demonstrated that quercetin induces intrinsic apoptosis and cytoprotective autophagy, and autophagy inhibition can potentiate BAK-dependent apoptotic activity of quercetin in Jurkat T cells.
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Vega BA, Belinka BA, Kachlany SC. Aggregatibacter actinomycetemcomitans Leukotoxin (LtxA; Leukothera ®): Mechanisms of Action and Therapeutic Applications. Toxins (Basel) 2019; 11:toxins11090489. [PMID: 31454891 PMCID: PMC6784247 DOI: 10.3390/toxins11090489] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 08/21/2019] [Accepted: 08/22/2019] [Indexed: 12/18/2022] Open
Abstract
Aggregatibacter actinomycetemcomitans is an oral pathogen that produces the RTX toxin, leukotoxin (LtxA; Leukothera®). A. actinomycetemcomitans is strongly associated with the development of localized aggressive periodontitis. LtxA acts as a virulence factor for A. actinomycetemcomitans to subvert the host immune response by binding to the β2 integrin lymphocyte function-associated antigen-1 (LFA-1; CD11a/CD18) on white blood cells (WBCs), causing cell death. In this paper, we reviewed the state of knowledge on LtxA interaction with WBCs and the subsequent mechanisms of induced cell death. Finally, we touched on the potential therapeutic applications of LtxA (trade name Leukothera®) toxin therapy for the treatment of hematological malignancies and immune-mediated diseases.
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Affiliation(s)
- Brian A Vega
- Department of Oral Biology, Rutgers School of Dental Medicine, Newark, NJ 07103, USA
- Actinobac Biomed, Inc., Princeton, NJ 08540, USA
| | | | - Scott C Kachlany
- Department of Oral Biology, Rutgers School of Dental Medicine, Newark, NJ 07103, USA.
- Actinobac Biomed, Inc., Princeton, NJ 08540, USA.
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Burgos-Aceves MA, Lionetti L, Faggio C. Multidisciplinary haematology as prognostic device in environmental and xenobiotic stress-induced response in fish. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 670:1170-1183. [PMID: 31018433 DOI: 10.1016/j.scitotenv.2019.03.275] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/18/2019] [Accepted: 03/18/2019] [Indexed: 06/09/2023]
Abstract
The variations of haematological parameters hematocrit, hemoglobin concentration, leukocyte and erythrocyte count have been used as pollution and physiological indicators of organic dysfunction in both environmental and aquaculture studies. These parameters are commonly applied as prognostic and diagnostic tools in fish health status. However, there are both extrinsic and intrinsic factors to consider when performing a blood test, because a major limitation for field researchers is that the "rules" for animal or human haematology do not always apply to wildlife. The main objective of this review is to show how some environmental and xenobiotic factors are capable to modulating the haematic cells. Visualizing the strengths and limitations of a haematological analysis in the health assessment of wild and culture fish. Finally, we point out the importance of the use of mitochondrial activities as part of haematological evaluations associated to environment or aquaculture stress.
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Affiliation(s)
- Mario Alberto Burgos-Aceves
- Departament of Chemistry and Biology, University of Salerno, via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy
| | - Lillà Lionetti
- Departament of Chemistry and Biology, University of Salerno, via Giovanni Paolo II, 132, 84084 Fisciano, SA, Italy
| | - Caterina Faggio
- Department of Chemical, Biological, Pharmaceutical, and Environmental Sciences, University of Messina, Viale F. Stagno d'Alcontres, 31, 98166 Messina, Italy.
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ROS Induced by KillerRed Targeting Mitochondria (mtKR) Enhances Apoptosis Caused by Radiation via Cyt c/Caspase-3 Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4528616. [PMID: 30984335 PMCID: PMC6431512 DOI: 10.1155/2019/4528616] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Revised: 01/02/2019] [Accepted: 01/22/2019] [Indexed: 12/12/2022]
Abstract
During radiotherapy, reactive oxygen species- (ROS-) induced apoptosis is one of the main mechanism of radiation. Based on KillerRed which can induce ROS burst in different cell substructures, here we hypothesized that KillerRed targeting mitochondria (mtKR) could induce ROS to enhance apoptosis by radiation. In this study, empty vector, mtKR, and mtmCherry plasmids were successfully constructed, and mitochondrial localization were detected in COS-7 and HeLa cells. After HeLa cells were transfected and irradiated by visible light and X-rays, ROS levels, mitochondrial membrane potential (Δψm), ATPase activities, adenosine triphosphate (ATP) content, apoptosis, and the expressions of mRNA and protein were measured, respectively. Data demonstrated that the ROS levels significantly increased after light exposure, and adding extra radiation, voltage-dependent anion channel 1 (VDAC1) protein increased in the mitochondria, while Na+-K+ and Ca2+-Mg2+ ATPase activities, ATP content, and Δψm significantly reduced. Additionally, the cell apoptotic rates dramatically increased, which referred to the increase of cytochrome c (Cyt c), caspase-9, and caspase-3 mRNA expressions, and Cyt c protein was released from the mitochondria into the cytoplasm; caspase-9 and -3 were activated. These results indicated that mtKR can increase the production of ROS, enhance mitochondrial dysfunction, and strengthen apoptosis by radiation via Cyt c/caspase-3 pathway.
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Chen K, Cai H, Zhang H, Zhu H, Gu Z, Gong Q, Luo K. Stimuli-responsive polymer-doxorubicin conjugate: Antitumor mechanism and potential as nano-prodrug. Acta Biomater 2019; 84:339-355. [PMID: 30503561 DOI: 10.1016/j.actbio.2018.11.050] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 11/23/2018] [Accepted: 11/28/2018] [Indexed: 01/17/2023]
Abstract
Polymer-drug conjugates has significantly improved the anti-tumor efficacy of chemotherapeutic drugs and alleviated their side effects. N-(1,3-dihydroxypropan-2-yl) methacrylamide (DHPMA) copolymer was synthesized via RAFT polymerization and polymer-doxorubicin (DOX) (diblock pDHPMA-DOX) were formed by conjugation, resulting in a self-aggregation-induced nanoprodrug with a favorable size of 21 nm and great stability. The nanoprodrug with a molecular weight (MW) of 95 kDa released drugs in response to tumor microenvironmental pH variations and they were enzymatically hydrolyzed into low MW segments (45 kDa). The nanoprodrug was transported through the endolysosomal pathway, released the drug into the cytoplasm and some was localized in the mitochondria, resulting in disruption of the cellular actin cytoskeleton. Cellular apoptosis was also associated with reduction in the mitochondrial potential caused by the nanoprodrug. Notably, the nanoprodrug had a significantly prolonged blood circulation time with an elimination half time of 9.8 h, displayed high accumulation within tumors, and improved the in vivo therapeutic efficacy against 4T1 xenograft tumors compared to free DOX. The tumor xenograft immunohistochemistry study clearly indicated tumor inhibition was through the inhibition of cell proliferation and antiangiogenic effects. Our studies demonstrated that the diblock pDHPMA-DOX nanoprodrug with a controlled molecular structure is promising to alleviate adverse effects of free DOX and have a great potential as an efficient anticancer agent. STATEMENT OF SIGNIFICANCE: In this work, we prepared a biodegradable diblock DHPMA polymer-doxorubicin conjugate via one-pot of RAFT polymerization and conjugate chemistry. The conjugate-based nanoprodrug was internalized by endocytosis to intracellularly release DOX and further induce disruption of mitochondrial functions, actin cytoskeleton alterations and cellular apoptosis. The nanoprodrug with a high molecular weight (MW) (95 kDa) showed a long blood circulation time and achieved high accumulation into tumors. The nanoprodrug was degraded into low MW (∼45 kDa) products below the renal threshold, which ensured its biosafety. Additionally, the multi-stimuli-responsive nanoprodrug demonstrated an enhanced antitumor efficacy against 4T1 breast tumors and alleviated side effects, showing a great potential as an efficient and safe anticancer agent.
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Affiliation(s)
- Kai Chen
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Hao Cai
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China; National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Hu Zhang
- Amgen Bioprocess Centre, Keck Graduate Institute, CA 91711, USA
| | - Hongyan Zhu
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Zhongwei Gu
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China; National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, China
| | - Qiyong Gong
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Kui Luo
- Huaxi MR Research Center (HMRRC), Department of Radiology, West China Hospital, Sichuan University, Chengdu 610041, China.
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A new therapeutic combination for osteosarcoma: Gemcitabine and Clofazimine co-loaded liposomal formulation. Int J Pharm 2018; 557:97-104. [PMID: 30586631 DOI: 10.1016/j.ijpharm.2018.12.041] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 12/04/2018] [Accepted: 12/19/2018] [Indexed: 11/22/2022]
Abstract
Osteosarcoma is the most common cancer in bone. Drug resistance is a challenge of current treatments that needs to be improved with novel treatment strategies. In this research, a new dual drug delivery system was developed with Gemcitabine (GEM) and Clofazimine (CLF) co-loaded liposome formulations. GEM is a well-known anticancer agent and CLF is a leprostatic and anti-inflammatory drug recently recognized as effective on cancer. GEM and CLF co-loaded liposomal formulation was achieved with compartmentalization as hydrophilic GEM being in core and lipophilic CLF sequestering in lipid-bilayer. Liposomes had high encapsulation efficiency (above 90%, GEM and above 80%, CLF). CLF release was enhanced while GEM release was slowed down in co-loaded liposomes compared to single cases. GEM/CLF co-loaded liposomes significantly enhanced cytotoxicity than GEM or CLF loaded liposomes on osteosarcoma cell line. CLF and GEM had synergistic effect (CI < 1). Results of flow cytometry showed higher apoptotic cell ratio, caspase-3 activity, mitochondrial membrane depolarized cells' ratio for GEM/CLF co-loaded liposome treatments than other liposomes. Cytotoxicity of CLF on bone cancer cells and also its synergistic effect with GEM on osteosarcoma is reported for the first time with this study. CLF's loading with GEM into liposome was also a new approach for enhancement of anticancer effect on Saos-2 cells. Therefore, GEM/CLF co-loaded liposomal delivery system is proposed as a novel approach for treatment of osteosarcoma.
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Zhong Y, Jin C, Wang X, Li X, Han J, Xue W, Wu P, Peng X, Xia X. Protective effects of apigenin against 3-MCPD-induced renal injury in rat. Chem Biol Interact 2018; 296:9-17. [DOI: 10.1016/j.cbi.2018.08.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Revised: 07/22/2018] [Accepted: 08/10/2018] [Indexed: 12/27/2022]
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Krishna H, Changil A, Srinivas M, Roy TS, Jacob TG. Ultrastructural Study of Rat Testis Following Conventional Phototherapy during Neonatal Period. J Microsc Ultrastruct 2018; 6:205-211. [PMID: 30464894 PMCID: PMC6206757 DOI: 10.4103/jmau.jmau_17_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Introduction Phototherapy is the most common treatment for neonatal jaundice. This study sought to determine ultrastructural changes in testis, at different time-points, after 48 hours of conventional phototherapy was given to newborn rats. Methods Newborn male Wistar rats (n = 36) were divided into two groups as follows - group 1 (G1), control (without phototherapy) and group 2 (G2), exposure to conventional phototherapy for 48 h. Six animals from each group were sacrificed on postnatal days (PND) 70, 100 and 130. The testes were dissected out and processed for Transmission Electron Microscopy (TEM). Results TEM showed that G2 on PND 70 and 100 showed damaged organelles, including nuclei, mitochondria, endoplasmic reticulum, vacuoles and electron dense bodies in the testes. Seminiferous Tubule on PND130 showed lesser damage. On PND70 ST wall thickness (STWT) of G2 was significantly higher (P < 0.001) than G1 STWT of G2 was significantly lower than G1 on PND100 (P = 0.047) and on PND130 (P < 0.001). Mitochondrial diameter in spermatogonia was significantly higher in G2 on PND70 (P = 0.001), PND100 (P = 0.031) and PND130 (P = 0.028). Primary spermatocytes in G2 also had larger mitochondria on PND70 (P < 0.001), PND100 (P = 0.007) and PND130 (P = 0.008). Further, spermatids had larger mitochondria in G2 on PND70 (P < 0.001), PND100 (P = 0.044) and PND130 (P < 0.001). Conclusion Phototherapy causes degenerative changes in rat testis on PND70 and 100 that partially recover by PND 130.
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Affiliation(s)
- Hare Krishna
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Asha Changil
- Department of Anatomy, Army College of Medical Sciences, New Delhi, India
| | - M Srinivas
- Department of Paediatric Surgery, ESIC Medical College, Hyderabad, Telangana, India
| | - Tara Sankar Roy
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
| | - Tony George Jacob
- Department of Anatomy, All India Institute of Medical Sciences, New Delhi, India
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Kumar N, Yadav N, Amarnath N, Sharma V, Shukla S, Srivastava A, Prasad P, Kumar A, Garg S, Singh S, Sehrawat S, Lochab B. Integrative natural medicine inspired graphene nanovehicle-benzoxazine derivatives as potent therapy for cancer. Mol Cell Biochem 2018; 454:123-138. [PMID: 30390174 DOI: 10.1007/s11010-018-3458-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 10/05/2018] [Indexed: 01/20/2023]
Abstract
Natural products from medicinal plants have always attracted a lot of attention due to their diverse and interesting therapeutic properties. We have employed the principles of green chemistry involving isomerization, coupling and condensation reaction to synthesize a class of compounds derived from eugenol, a naturally occurring bioactive phytophenol. The compounds were characterized structurally by 1H-, 13C-NMR, FT-IR spectroscopy and mass spectrometry analysis. The purity of compounds was detected by HPLC. The synthesized compounds exhibited anti-cancer activity. A 10-12-fold enhancement in efficiency of drug molecules (~ 1 µM) was observed when delivered with graphene oxide (GO) as a nanovehicle. Our data suggest cell death via apoptosis in a dose-dependent manner due to increase in calcium levels in specific cancer cell lines. Interestingly, the benzoxazine derivatives of eugenol with GO nanoparticle exhibited enhanced therapeutic potential in cancer cells. In addition to anti-cancer effect, we also observed significant role of these derivatives on parasite suggesting its multi-pharmacological capability.
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Affiliation(s)
- Naveen Kumar
- Brain Metastasis and NeuroVascular Disease Modelling Lab, Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NCR, India
| | - Nisha Yadav
- Materials Chemistry Lab, Department of Chemistry, School of Natural Sciences, Shiv Nadar University, NCR, India
| | - Nagarjuna Amarnath
- Materials Chemistry Lab, Department of Chemistry, School of Natural Sciences, Shiv Nadar University, NCR, India
| | - Vijeta Sharma
- Infectious Disease Lab, Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NCR, India
| | - Swapnil Shukla
- Materials Chemistry Lab, Department of Chemistry, School of Natural Sciences, Shiv Nadar University, NCR, India
| | - Akriti Srivastava
- Infectious Disease Lab, Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NCR, India
| | - Peeyush Prasad
- Brain Metastasis and NeuroVascular Disease Modelling Lab, Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NCR, India
| | - Anil Kumar
- James Graham Brown Cancer Centre, University of Louisville, 40202, Louisville, KY, USA
| | - Swati Garg
- Infectious Disease Lab, Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NCR, India
| | - Shailja Singh
- Infectious Disease Lab, Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NCR, India.
- Signaling Biology Lab, Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi, India.
| | - Seema Sehrawat
- Brain Metastasis and NeuroVascular Disease Modelling Lab, Department of Life Sciences, School of Natural Sciences, Shiv Nadar University, NCR, India.
| | - Bimlesh Lochab
- Materials Chemistry Lab, Department of Chemistry, School of Natural Sciences, Shiv Nadar University, NCR, India.
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Light-induced generation and toxicity of docosahexaenoate-derived oxidation products in retinal pigmented epithelial cells. Exp Eye Res 2018; 181:325-345. [PMID: 30296412 DOI: 10.1016/j.exer.2018.09.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 09/21/2018] [Accepted: 09/23/2018] [Indexed: 12/11/2022]
Abstract
Oxidative cleavage of docosahexaenoate (DHA) in retinal pigmented epithelial (RPE) cells produces 4-hydroxy-7-oxohept-5-enoic acid (HOHA) esters of 2-lysophosphatidylcholine (PC). HOHA-PC spontaneously releases a membrane-permeant HOHA lactone that modifies primary amino groups of proteins and ethanolamine phospholipids to produce 2-(ω-carboxyethyl)pyrrole (CEP) derivatives. CEPs have significant pathological relevance to age-related macular degeneration (AMD) including activation of CEP-specific T-cells leading to inflammatory M1 polarization of macrophages in the retina involved in "dry AMD" and TLR2-dependent induction of angiogenesis that characterizes "wet AMD". RPE cells accumulate DHA from shed rod photoreceptor outer segments through phagocytosis and from plasma lipoproteins secreted by the liver through active uptake from the choriocapillaris. As a cell model of light-induced oxidative damage of DHA phospholipids in RPE cells, ARPE-19 cells were supplemented with DHA, with or without the lipofuscin fluorophore A2E. In this model, light exposure, in the absence of A2E, promoted the generation HOHA lactone-glutathione (GSH) adducts, depletion of intracellular GSH and a competing generation of CEPs. While DHA-rich RPE cells exhibit an inherent proclivity toward light-induced oxidative damage, photosensitization by A2E nearly doubled the amount of lipid oxidation and expanded the spectral range of photosensitivity to longer wavelengths. Exposure of ARPE-19 cells to 1 μM HOHA lactone for 24 h induced massive (50%) loss of lysosomal membrane integrity and caused loss of mitochondrial membrane potential. Using senescence-associated β-galactosidase (SA β-gal) staining that detects lysosomal β-galactosidase, we determined that exposure to HOHA lactone induces senescence in ARPE-19 cells. The present study shows that products of light-induced oxidative damage of DHA phospholipids in the absence of A2E can lead to RPE cell dysfunction. Therefore, their toxicity may be especially important in the early stages of AMD before RPE cells accumulate lipofuscin fluorophores.
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Qian Y, Han QH, Wang LC, Guo Q, Wang XD, Tu PF, Zeng KW, Liang H. Total saponins of Albiziae Cortex show anti-hepatoma carcinoma effects by inducing S phase arrest and mitochondrial apoptosis pathway activation. JOURNAL OF ETHNOPHARMACOLOGY 2018; 221:20-29. [PMID: 29655853 DOI: 10.1016/j.jep.2018.04.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 04/01/2018] [Accepted: 04/11/2018] [Indexed: 06/08/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Albiziae Cortex (AC) is a widely used traditional medicine in China. It is possess various properties to treat insomnia, traumatic injuries, diuresis, sthenia, and confusion. Total saponins of Albiziae Cortex (TSAC) are the most abundant bioactive components of AC, which were reported to show significant anti-tumor effects in vivo and in vitro. But the underlying mechanism of TSAC remained to be revealed. AIM OF STUDY In this study, we investigated the anti-hepatoma carcinoma effects and the potential mechanism of TSAC in vivo and in vitro. MATERIALS AND METHODS We first purified TSAC from crude extracts and characterized the major bioactive compounds by high performance liquid chromatography (HPLC). Effects of TSAC on viability of various hepatoma carcinoma cell lines were measured by MTT. Inhibition on cell proliferation was analysed using colony formation assay. Cell cycle distribution was revealed by flow cytometry. The apoptotic cells were observed by Hoechst 33258 staining and acridine orange (AO)/ethidium bromide (EB) double staining. Microstructures of apoptotic cells were examined by Transmission electron microscopy (TEM). The mitochondrial membrane potential were determined by JC-1 staining. Western blot was used to investigate the effects of TSAC on apoptosis-related proteins, B-cell lymphoma-2 (Bcl-2) and Bcl-2-associated X protein (Bax), and S-phase related protein cyclin A, cyclin E and cyclin-dependent kinases 2 (CDK2). Effects on tumor growth was assessed by H22-bearing ICR mice. RESULTS TSAC significantly decreased the hepatoma carcinoma cell viability and inhibited HepG2 cell colony formation in a concentration-dependent manner. We also found that TSAC inhibited HepG2 cell growth via induction of S phase arrest. Further study showed that TSAC significantly down-regulated the expressions of cyclin A, cyclin E and CDK2 in HepG2 cells. Meanwhile, TSAC could effectively induce mitochondria-dependent caspase apoptosis pathway activation. Furthermore, TSAC increased the expression of pro-apoptotic protein Bax and decreased the expression of anti-apoptotic protein Bcl-2. In vivo assay showed that the anti-tumor effects of TSAC were significantly augmented without increasing toxicity in H22-bearing ICR mice. CONCLUSION TSAC could inhibit cell proliferation through inducing S phase arrest and activate cell apoptosis via mitochondria-dependent apoptosis pathway. Therefore, TSAC could be a promising agent in clinical trials for anti-hepatoma carcinoma treatment.
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Affiliation(s)
- Yi Qian
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Qing-Hua Han
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Li-Chao Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China; State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjiaxiang, Nanjing 210009, China
| | - Qiang Guo
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Xu-Da Wang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Peng-Fei Tu
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China
| | - Ke-Wu Zeng
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China.
| | - Hong Liang
- State Key Laboratory of Natural and Biomimetic Drugs, Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, China.
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Mosquillo MF, Bilbao L, Hernández F, Tissot F, Gambino D, Garat B, Pérez-Díaz L. Trypanosoma cruzibiochemical changes and cell death induced by an organometallic platinum-based compound. Chem Biol Drug Des 2018; 92:1657-1669. [DOI: 10.1111/cbdd.13332] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/23/2018] [Accepted: 04/21/2018] [Indexed: 02/06/2023]
Affiliation(s)
- M. Florencia Mosquillo
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - Lucía Bilbao
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - Fabricio Hernández
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - Florencia Tissot
- Cátedra de Química Analítica; Facultad de Química; Universidad de la República; Montevideo Uruguay
| | - Dinorah Gambino
- Cátedra de Química Inorgánica; Facultad de Química; Universidad de la República; Montevideo Uruguay
| | - Beatriz Garat
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
| | - Leticia Pérez-Díaz
- Laboratorio de Interacciones Moleculares; Facultad de Ciencias; Universidad de la República; Montevideo Uruguay
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Benzoxazine derivatives of phytophenols show anti-plasmodial activity via sodium homeostasis disruption. Bioorg Med Chem Lett 2018; 28:1629-1637. [DOI: 10.1016/j.bmcl.2018.03.047] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Revised: 03/17/2018] [Accepted: 03/17/2018] [Indexed: 12/21/2022]
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Abstract
The cyclic nucleotides cAMP and cGMP are well-characterized second messenger molecules regulating many important intracellular processes, such as differentiation, proliferation, and apoptosis. The latter is a highly regulated process of programmed cell death wherein several regulatory proteins, like those belonging to the Bcl-2 family, are involved. The initiation of apoptosis is regulated by three different pathways: the intrinsic or mitochondrial, the extrinsic, and the ER stress pathway. Recently, it has been published that the pyrimidine cyclic nucleotides cCMP and cUMP also function as second messenger molecules, and additionally have an effect on apoptosis signaling pathways. cCMP induced PKA-independent apoptosis via the intrinsic and ER-stress pathway in S49 mouse lymphoma cells, and cCMP as well as cUMP induced apoptosis in human HEL cells via the intrinsic pathway. However, in human K-562 cells, which are known to be multidrug-resistant, cCMP and cUMP had no effect. Summarized in this chapter are the initiation of apoptosis by cCMP and cUMP regarding the various apoptotic pathways, the enzymes involved in apoptosis, as well as the most relevant methods for the detection and examination of apoptosis and the corresponding signaling pathways.
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Heteroleptic oxidovanadium(IV) complexes of 2-hydroxynaphtylaldimine and polypyridyl ligands against Trypanosoma cruzi and prostate cancer cells. J Inorg Biochem 2017; 175:154-166. [PMID: 28755573 DOI: 10.1016/j.jinorgbio.2017.07.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 06/20/2017] [Accepted: 07/14/2017] [Indexed: 12/22/2022]
Abstract
In Latin America Chagas disease is an endemic illness caused by the parasite Trypanosoma cruzi (T. cruzi), killing more people than any other parasitic disease. Current chemotherapies are old and inadequate, thus the development of efficient ones is urgently needed. Vanadium-based complexes have been shown to be a promising approach both against parasitic diseases and cancer and this study aims to achieve significant advances in the pursue of effective compounds. Heteroleptic vanadium complexes of Schiff bases and polypyridine compounds were prepared and their stability in solution evaluated by EPR (Electronic Paramagnetic Resonance) and NMR spectroscopy. Their in vitro activities were evaluated against T. cruzi and a set of cells lines representative of human cancer conditions, namely ovarian, breast and prostate cancer. In T. cruzi, most of the complexes depicted IC50 values in the low μM range, induced changes of mitochondrial membrane potential and apoptosis. In cancer cells, complexes showed good to moderate activity and in metastatic cells (prostate PC3), some complexes inhibited the migratory ability, this suggesting that they display antimetastatic potential. Interestingly, complex 5 seemed to have a dual effect being the most cytotoxic complex on all cancer cells and also the most active anti-T-cruzi compound of the series. Globally the complexes showed promising anticancer and anti T. cruzi activities and also displayed some characteristics indicating they are worth to be further explored as antimetastatic drugs.
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46
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Rainey NE, Saric A, Leberre A, Dewailly E, Slomianny C, Vial G, Zeliger HI, Petit PX. Synergistic cellular effects including mitochondrial destabilization, autophagy and apoptosis following low-level exposure to a mixture of lipophilic persistent organic pollutants. Sci Rep 2017; 7:4728. [PMID: 28680151 PMCID: PMC5498599 DOI: 10.1038/s41598-017-04654-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Accepted: 05/25/2017] [Indexed: 12/13/2022] Open
Abstract
Humans are exposed to multiple exogenous environmental pollutants. Many of these compounds are parts of mixtures that can exacerbate harmful effects of the individual mixture components. 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD), is primarily produced via industrial processes including incineration and the manufacture of herbicides. Both endosulfan and TCDD are persistent organic pollutants which elicit cytotoxic effects by inducing reactive oxygen species generation. Sublethal concentrations of mixtures of TCDD and endosulfan increase oxidative stress, as well as mitochondrial homeostasis disruption, which is preceded by a calcium rise and, in fine, induce cell death. TCDD+Endosulfan elicit a complex signaling sequence involving reticulum endoplasmic destalilization which leads to Ca2+ rise, superoxide anion production, ATP drop and late NADP(H) depletion associated with a mitochondrial induced apoptosis concomitant early autophagic processes. The ROS scavenger, N-acetyl-cysteine, blocks both the mixture-induced autophagy and death. Calcium chelators act similarly and mitochondrially targeted anti-oxidants also abrogate these effects. Inhibition of the autophagic fluxes with 3-methyladenine, increases mixture-induced cell death. These findings show that subchronic doses of pollutants may act synergistically. They also reveal that the onset of autophagy might serve as a protective mechanism against ROS-triggered cytotoxic effects of a cocktail of pollutants in Caco-2 cells and increase their tumorigenicity.
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Affiliation(s)
- Nathan E Rainey
- Laboratoire de Toxicologie, Pharmacologie et Signalisation Cellulaire, INSERM S-1124, Université Paris-Descartes, Centre Universitaire des Saints-Pères, 45 Rue des Saints-Pères, F-75270, Paris, Cedex 06, France
- Laboratory for Vascular Translational Science (LVTS), INSERM U1148, X. Bichat Hospital, Université Paris 13, UFR SMBH Sorbonne Paris Cité, 75018, Paris, France
| | - Ana Saric
- Laboratoire de Toxicologie, Pharmacologie et Signalisation Cellulaire, INSERM S-1124, Université Paris-Descartes, Centre Universitaire des Saints-Pères, 45 Rue des Saints-Pères, F-75270, Paris, Cedex 06, France
- Division of Molecular Medicine, Rudger Boskovic Institute, Zagreb, Croatia
| | - Alexandre Leberre
- Laboratoire de Toxicologie, Pharmacologie et Signalisation Cellulaire, INSERM S-1124, Université Paris-Descartes, Centre Universitaire des Saints-Pères, 45 Rue des Saints-Pères, F-75270, Paris, Cedex 06, France
| | - Etienne Dewailly
- Laboratoire de Physiologie cellulaire, INSERM U800, Université des Sciences et Techniques de Lille 1, F-59655, Villeneuve d'Ascq, Cedex, France
| | - Christian Slomianny
- Laboratoire de Physiologie cellulaire, INSERM U800, Université des Sciences et Techniques de Lille 1, F-59655, Villeneuve d'Ascq, Cedex, France
| | - Guillaume Vial
- Unité 1060 INSERM CarMen/Univ.Lyon1/INRA 1235, INSA, Bât. IMBL, La Doua 11 Avenue Jean Capelle, 69100, Villeurbanne, France
| | - Harold I Zeliger
- Zeliger Chemical, Toxicological and Environmental Research, 41 Wildwood Drive, Cape Elizabeth, Maine, 04107, USA
| | - Patrice X Petit
- Laboratoire de Toxicologie, Pharmacologie et Signalisation Cellulaire, INSERM S-1124, Université Paris-Descartes, Centre Universitaire des Saints-Pères, 45 Rue des Saints-Pères, F-75270, Paris, Cedex 06, France.
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Richard S, Boucher M, Saric A, Herbet A, Lalatonne Y, Petit PX, Mériaux S, Boquet D, Motte L. Optimization of pegylated iron oxide nanoplatforms for antibody coupling and bio-targeting. J Mater Chem B 2017; 5:2896-2907. [PMID: 32263983 DOI: 10.1039/c6tb03080g] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
PEGylation has been established as a valuable strategy to minimize nanoparticle clearance by the reticulo-endothelial system due to hydrophilicity and steric repulsion of PEG chains. In this study we functionalized superparamagnetic iron oxide nanoparticle surface with two PEG differing in their length (n = 23 and 44) and terminal functionality, COOH and CH3. By varying the ratio of the two different PEG, we optimized the molecular architecture of the nanoplatform to obtain maximum stability and low toxicity under physiological conditions. The best nanoplatform was evaluated as MRI contrast for mouse brain vascularization imaging at 7 T. The carboxylic acid functions of the nanoplatform were used to covalently bind an antibody, Ab. This antibody, labeled with a fluorophore, targets the ETA receptor, a G-protein-coupled receptor involved in the endothelin axis and overexpressed in various solid tumours, including ovarian, prostate, colon, breast, bladder and lung cancers. In vitro studies, performed by flow cytometry and magnetic quantification, showed the targeting efficiency of the Ab-nanoplatforms. Clearly, an imaging tracer for cancer diagnosis from a bimodal contrast agent (fluorescence and MRI) was thus obtained.
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Affiliation(s)
- S Richard
- Laboratoire Matière et Systèmes Complexes (MSC), UMR 7057, CNRS and Université Paris Diderot, 75205 Paris Cedex 05, France
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Friehs E, AlSalka Y, Jonczyk R, Lavrentieva A, Jochums A, Walter JG, Stahl F, Scheper T, Bahnemann D. Toxicity, phototoxicity and biocidal activity of nanoparticles employed in photocatalysis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2016. [DOI: 10.1016/j.jphotochemrev.2016.09.001] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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49
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Springler A, Hessenberger S, Reisinger N, Kern C, Nagl V, Schatzmayr G, Mayer E. Deoxynivalenol and its metabolite deepoxy-deoxynivalenol: multi-parameter analysis for the evaluation of cytotoxicity and cellular effects. Mycotoxin Res 2016; 33:25-37. [PMID: 27817099 PMCID: PMC5239812 DOI: 10.1007/s12550-016-0260-z] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/22/2016] [Accepted: 10/23/2016] [Indexed: 11/29/2022]
Abstract
The mycotoxin deoxynivalenol (DON) contaminates agricultural commodities worldwide, posing health threats to humans and animals. Associated with DON are derivatives, such as deepoxy-deoxynivalenol (DOM-1), produced by enzymatic transformation of certain intestinal bacteria, which are naturally occurring or applied as feed additives. Using differentiated porcine intestinal epithelial cells (IPEC-J2), we provide the first multi-parameter comparative cytotoxicity analysis of DON and DOM-1, based on the parallel evaluation of lysosomal activity, total protein content, membrane integrity, mitochondrial metabolism and ATP synthesis. The study investigated the ability of DON and—for the first time of its metabolite DOM-1—to induce apoptosis, mitogen-activated protein kinase (MAPK) signalling, oxidative events and alterations of mitochondrial structure in porcine intestinal epithelial cells (IECs). The degree of DON toxicity strongly varied, depending on the cytotoxicity parameter evaluated. DON compromised viability according to the parameters of lysosomal activity, total protein content and membrane integrity, but increased viability according to assays based on mitochondrial metabolism and ATP synthesis. DON induced expression of cleaved caspase-3 (maximum induction 3.9-fold) and MAPK p38 and p42/p44 (maximum induction 2.51- and 2.30-fold, respectively). DON altered mitochondrial morphology, but did not increase intracellular ROS. DOM-1-treated IPEC-J2 remained unaffected at equimolar concentrations in all assays, thereby confirming the safety of feed additives using DON- to DOM-1-transforming bacteria. The study additionally highlights that an extensive multi-parameter analysis significantly contributes to the quality of in vitro data.
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Affiliation(s)
- Alexandra Springler
- BIOMIN Research Center, Technopark 1, 3430, Tulln an der Donau, Austria.,Department of Applied Genetics and Cell Biology, University of Natural Resources and Life Sciences, Vienna, Austria
| | | | - Nicole Reisinger
- BIOMIN Research Center, Technopark 1, 3430, Tulln an der Donau, Austria
| | - Corinna Kern
- BIOMIN Research Center, Technopark 1, 3430, Tulln an der Donau, Austria
| | - Veronika Nagl
- BIOMIN Research Center, Technopark 1, 3430, Tulln an der Donau, Austria
| | - Gerd Schatzmayr
- BIOMIN Research Center, Technopark 1, 3430, Tulln an der Donau, Austria
| | - Elisabeth Mayer
- BIOMIN Research Center, Technopark 1, 3430, Tulln an der Donau, Austria.
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50
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Venugopalan SK, T S S, V N, S M M, S R. Dexamethasone provoked mitochondrial perturbations in thymus: Possible role of N-acetylglucosamine in restoration of mitochondrial function. Biomed Pharmacother 2016; 83:1485-1492. [PMID: 27619103 DOI: 10.1016/j.biopha.2016.08.068] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 08/15/2016] [Accepted: 08/29/2016] [Indexed: 01/14/2023] Open
Abstract
Thymus mitochondria play a crucial role in immune function. This study identifies the novel protective role of N-Acetylglucosamine (NAG) in dexamethasone (DEX) induced mitochondrial perturbations in mice thymus. Mice were induced with DEX (5mg/kg) and treated with NAG i.p. (266μg/kg, 400μg/kg and 800μg/kg) for 14 days, Withanolide A (800μg/kg) has been used as positive control. Dose dependent treatment of NAG against DEX significantly restored the mitochondrial enzyme levels (ICDH, KDH, SDH and MDH) and elevated the mitochondrial glutathione antioxidants defense (GSH, SOD, GPX and GST) thus improving the ATP status which was confirmed by ultrastructural alterations in mitochondria and nucleus using TEM studies. Further histopathological studies also revealed that NAG attenuate DEX induced thymotoxicity. Finally, the study concludes that dose dependent treatment of NAG supports a potential role in preventing DEX induced thymotoxicity and NAG acts as a beneficial pharmacological intervention in the DEX induced thymic repercussions.
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Affiliation(s)
- Santhosh Kumar Venugopalan
- Centre for Drug Research, Universiti Sains Malaysia (USM), Penang, Malaysia; Department of Pharmacology, School of Pharmaceutical Sciences, Vels University (VISTAS), Pallavaram, Chennai, India.
| | - Shanmugarajan T S
- Department of Pharmacology, School of Pharmaceutical Sciences, Vels University (VISTAS), Pallavaram, Chennai, India
| | - Navaratnam V
- Centre for Drug Research, Universiti Sains Malaysia (USM), Penang, Malaysia; Taylor's University Malaysia, Jan Taylors, Subang Jaya, Selangor, Malaysia
| | - Mansor S M
- Centre for Drug Research, Universiti Sains Malaysia (USM), Penang, Malaysia
| | - Ramanathan S
- Centre for Drug Research, Universiti Sains Malaysia (USM), Penang, Malaysia
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