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Mitochondrial apoptosis

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https://www.readbyqxmd.com/read/28654762/jatropha-6-17-11e-diene-class-derivatives-induce-apoptosis-effects-in-ovcar-3-and-caov-4-ovarian-cancer-cell-lines-via-mitochondrial-pathway
#1
Behzad Bahmani, Mohammad Keyvanloo Shahrestanaki, Mustafa Ghanadian, Sima Hajiahmadi, Mahmoud Aghaei
We investigated the molecular mechanism of apoptosis induced by novel jatropha-6(17),11E-diene class derivatives, compounds A, B, and C extracted from Euphorbia osyridea in Caov-4 and OVCAR-3 ovarian cancer cell lines. OVCAR-3 and Caov-4 cell lines were treated with different concentrations of these compounds. Cytotoxicity was evaluated by MTT, clonogenic survival assay and Flow cytometry assays. ROS production, mitochondrial membrane potential (ΔΨm), Caspase 3 and 9 activities were evaluated. Compound A, B, and C reduced cell viability in a dose-dependent manner (P<0...
June 27, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/28654704/2-5-hexanedione-downregulates-nerve-growth-factor-and-induces-neuron-apoptosis-in-the-spinal-cord-of-rats-via-inhibition-of-the-pi3k-akt-signaling-pathway
#2
Zhemin Wang, Zewen Qiu, Chenxue Gao, Yijie Sun, Wei Dong, Yan Zhang, Ruolin Chen, Yuan Qi, Shuangyue Li, Yanjie Guo, Yongjun Piao, Sheng Li, Fengyuan Piao
2,5-hexanedione (2,5-HD) is the main active metabolite of n-hexane and induces apoptosis in nerve tissue, however, the mechanism of which remains unclear. In the present study, neuropathic animal models were successfully constructed in rats by injecting 100, 200 and 400 mg/kg 2,5-HD intraperitoneally for 5 weeks. Rats exposed to 2,5-HD exhibited progressive gait abnormalities and slower motor neural response in a dose-dependent manner. TUNEL analysis and immunofluorescence dual labeling revealed that the spinal cord of the 2,5-HD treated rats underwent significantly more apoptosis in the cells of spinal cord than that of the control group...
2017: PloS One
https://www.readbyqxmd.com/read/28653874/invalidation-of-mitophagy-by-fbp1-mediated-repression-promotes-apoptosis-in-breast-cancer
#3
Yifeng Liu, Yulin Jiang, Nian Wang, Qianni Jin, Feihu Ji, Changli Zhong, Zhiqiang Zhang, Junhong Yang, Xiangsen Ye, Tingmei Chen
Fructose-1,6-bisphosphatase 1, a rate-limiting enzyme in gluconeogenesis, was recently shown to be a tumor suppressor. However, the functions of fructose-1,6-bisphosphatase 1 in the regulation of mitophagy and apoptosis remain unknown. Here, we investigated the effects of fructose-1,6-bisphosphatase 1 on mitophagy and apoptosis as well as their underlying mechanisms in breast cancer cells. In this work, the messenger RNA and protein expression of various molecules were determined by quantitative realtime polymerase chain reaction and western blot, respectively...
June 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28653252/sil-24-peptide-a-human-interleukin-24-isoform-induces-mitochondrial-mediated-apoptosis-in-human-cancer-cells
#4
Samira Valiyari, Mona Salami, Reza Mahdian, Mohammad Ali Shokrgozar, Mana Oloomi, Azadeh Mohammadi Farsani, Saeid Bouzari
PURPOSE: Interleukin-24 (IL-24) is a unique cytokine in the IL-10 family that reveals tumor-suppressive activity against a broad range of cancers. Alternative splicing of human IL-24 generates several isoforms with different pro-apoptotic activities. In the current study, we aimed to investigate the cytotoxic properties of a recombinant smallest isoform of IL-24 (sIL-24) and the underlying molecular mechanisms in PC-3, A549, U937, and Raji cancer cells as well as normal cell line MRC-5...
June 26, 2017: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/28652543/ghrelin-does-not-influence-cancer-progression-in-a-lung-adenocarcinoma-cell-line
#5
Hironobu Tsubouchi, Hitomi Onomura, Yusuke Saito, Shigehisa Yanagi, Ayako Miura, Ayako Matsuo, Nobuhiro Matsumoto, Masamitsu Nakazato
Ghrelin, an endogenous ligand for the growth hormone secretagogue receptor (GHSR), is produced in the human stomach. Although ghrelin has therapeutic potential for cancer cachexia, ghrelin treatment may have a concern about accelerating cancer progression. Here, using the human lung adenocarcinoma cell line HLC-1, we investigated the effects of ghrelin on molecular mechanisms linked to cancer progression, including cell viability, proliferation, resistance to apoptosis, and mitochondrial activity. Both types of mouse alveolar epithelial cells (types I and II) expressed the GHSR, as did the human normal airway cell lines BEAS-2B and HLC-1...
2017: Endocrine Journal
https://www.readbyqxmd.com/read/28652202/induction-of-cyp1a1-increases-gefitinib-induced-oxidative-stress-and-apoptosis-in-a549-cells
#6
Dan-Dan Wang, Yong Liu, Na Li, Yi Zhang, Qiang Jin, Da-Cheng Hao, Hai-Long Piao, Zi-Ru Dai, Guang-Bo Ge, Ling Yang
As the first selective EGFR tyrosine kinase inhibitor, gefitinib has been clinically demonstrated to be effective for certain cancer cell types with EGFR-active gene mutations. However, a number of gefitinib-associated adverse pulmonary events have been reported, which could lead to the discontinuation of gefitinib therapy. Although previous reports have implicated that CYP1A1-mediated bioactivation of gefitinib maybe a major reason for the pulmonary toxicity, the roles of CYP1A1 in gefitinib-associated toxicity and the related molecular mechanism have not been well-characterized...
June 23, 2017: Toxicology in Vitro: An International Journal Published in Association with BIBRA
https://www.readbyqxmd.com/read/28651465/new-6-17-epoxylathyrane-diterpene-aellinane-from-euphorbia-aellenii-induces-apoptosis-via-mitochondrial-pathway-in-ovarian-cancer-cell-line
#7
Fariba Nabatchian, Afshin Moradi, Mahmoud Aghaei, Mustafa Ghanadian, Seyyed Mehdi Jafari, Samineh Tabesh
Euphorbia species have been used in traditional medicine in many countries for the treatment of cancer. This paper aims to evaluate the capability of a new lathyrane diterpene isolated from Euphorbia aellenii to induce apoptosis in the Caov-4 cell line to determine the underlying mechanism of its anticancer effects. A new 6(17)-epoxylathyrane diterpenes: aellinane from Euphorbia aellenii was evaluated for viability of Caov-4 cells by MTT method. Apoptosis induction by lathyrane diterpene was confirmed by annexin V-FITC/PI staining, and caspase-6 activation...
June 27, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28650568/enhanced-functional-properties-of-human-limbal-stem-cells-by-inhibition-of-the-mir-31-fih-1-p21-axis
#8
Zhiping Liu, Weijiao Zhan, Minzhi Zeng, Jinghong Chen, Huyong Zou, Zhiqun Min
OBJECTIVE: On the basis of the functional roles of the embryonic stem cell niche (ESCN) in the human limbal stem cells (LSCs), we proposed to explore the potential roles of microRNAs in regulating the self-renewal and differentiation of LSCs cultured in the ESCN. METHODS: The LSCs were cultured in different media, either in CnT-20 media or in CnT-20 + 20% ES culture supernatant (ESC-CM). The LSCs cultured in ESC-CM were then transfected with microRNA-31 (miR-31) mimic or antago-31...
June 26, 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28650465/mcu-dependent-mitochondrial-ca-2-inhibits-nad-sirt3-sod2-pathway-to-promote-ros-production-and-metastasis-of-hcc-cells
#9
T Ren, H Zhang, J Wang, J Zhu, M Jin, Y Wu, X Guo, L Ji, Q Huang, H Zhang, H Yang, J Xing
Mitochondrial Ca(2+) signaling, which is strongly dependent on the mitochondrial Ca(2+) uniporter (MCU) complex, has a series of key roles in physiopathological processes, including energy metabolism, reactive oxygen species (ROS) production and cell apoptosis. However, a mechanistic understanding of how the mitochondrial Ca(2+) signaling is remodeled and its functional roles remains greatly limited in cancers, especially in hepatocellular carcinoma. Here we demonstrated that the MCU complex was dysregulated in hepatocellular carcinoma (HCC) cells and significantly correlated with metastasis and poor prognosis of HCC patients...
June 26, 2017: Oncogene
https://www.readbyqxmd.com/read/28649223/pretreatment-with-sodium-phenylbutyrate-alleviates-cerebral-ischemia-reperfusion-injury-by-upregulating-dj-1-protein
#10
Rui-Xin Yang, Jie Lei, Bo-Dong Wang, Da-Yun Feng, Lu Huang, Yu-Qian Li, Tao Li, Gang Zhu, Chen Li, Fang-Fang Lu, Tie-Jian Nie, Guo-Dong Gao, Li Gao
Oxidative stress and mitochondrial dysfunction play critical roles in ischemia/reperfusion (I/R) injury. DJ-1 is an endogenous antioxidant that attenuates oxidative stress and maintains mitochondrial function, likely acting as a protector of I/R injury. In the present study, we explored the protective effect of a possible DJ-1 agonist, sodium phenylbutyrate (SPB), against I/R injury by protecting mitochondrial dysfunction via the upregulation of DJ-1 protein. Pretreatment with SPB upregulated the DJ-1 protein level and rescued the I/R injury-induced DJ-1 decrease about 50% both in vivo and in vitro...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28649128/lx2343-alleviates-cognitive-impairments-in-ad-model-rats-by-inhibiting-oxidative-stress-induced-neuronal-apoptosis-and-tauopathy
#11
Xiao-Dan Guo, Guang-Long Sun, Ting-Ting Zhou, Yi-Yang Wang, Xin Xu, Xiao-Fan Shi, Zhi-Yuan Zhu, Vatcharin Rukachaisirikul, Li-Hong Hu, Xu Shen
Alzheimer's disease (AD) is a progressive neurodegenerative disease leading to the irreversible loss of brain neurons and cognitive abilities, and the vicious interplay between oxidative stress (OS) and tauopathy is believed to be one of the major players in AD development. Here, we demonstrated the capability of the small molecule N-(1,3-benzodioxol-5-yl)-2-[5-chloro-2-methoxy(phenylsulfonyl)anilino]acetamide (LX2343) to ameliorate the cognitive dysfunction of AD model rats by inhibiting OS-induced neuronal apoptosis and tauopathy...
June 26, 2017: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/28648953/synthesis-of-thiazole-linked-indolyl-3-glyoxylamide-derivatives-as-tubulin-polymerization-inhibitors
#12
Sravanthi Devi Guggilapu, Lalita Guntuku, T Srinivasa Reddy, Atulya Nagarsenkar, Dilep Kumar Sigalapalli, V G M Naidu, Suresh K Bhargava, Nagendra Babu Bathini
A series of thiazole linked indolyl-3-glyoxylamide derivatives were synthesized and evaluated for their in vitro cytotoxic activity against DU145 (prostate), PC-3 (prostate), A549 (lung) and HCT-15 (colon) cancer cell lines by employing the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Among all the synthesized compounds, compound 13d displayed cytotoxicity of IC50 = 93 nM towards DU145 cancer cell line. The most active compound 13d was also tested on RWPE-1 cells and was found to be safe compared to the DU145 cells...
June 15, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28648804/the-single-igf-1-partial-deficiency-is-responsible-for-mitochondrial-dysfunction-and-is-restored-by-igf-1-replacement-therapy
#13
M Olleros Santos-Ruiz, M C Sádaba, I Martín-Estal, U Muñoz, C Sebal Neira, I Castilla-Cortázar
BACKGROUND & AIMS: We previously described in cirrhosis and aging, both conditions of IGF-1 deficiency, a clear hepatic mitochondrial dysfunction with increased oxidative damage. In both conditions, the hepatic mitochondrial function was improved with low doses of IGF-1. The aim of this work was to explore if the only mere IGF-1 partial deficiency, without any exogenous insult, is responsible for hepatic mitochondrial dysfunction. METHODS: Heterozygous (igf1(+/-)) mice were divided into two groups: untreated and treated mice with low doses of IGF-1...
June 2, 2017: Growth Hormone & IGF Research
https://www.readbyqxmd.com/read/28648366/-oxidative-stress-in-perinatal-asphyxia-and-hypoxic-ischaemic-encephalopathy
#14
Antonio Nuñez, Isabel Benavente, Dorotea Blanco, Héctor Boix, Fernando Cabañas, Mercedes Chaffanel, Belén Fernández-Colomer, José Ramón Fernández-Lorenzo, Begoña Loureiro, María Teresa Moral, Antonio Pavón, Inés Tofé, Eva Valverde, Máximo Vento
Birth asphyxia is one of the principal causes of early neonatal death. In survivors it may evolve to hypoxic-ischaemic encephalopathy and major long-term neurological morbidity. Prolonged and intense asphyxia will lead to energy exhaustion in tissues exclusively dependent on aerobic metabolism, such as the central nervous system. Energy deficit leads to ATP-dependent pumps blockage, with the subsequent loss of neuronal transmembrane potential. The most sensitive areas of the brain will die due to necrosis. In more resistant areas, neuronal hyper-excitability, massive entrance of ionic calcium, activation of NO-synthase, free radical generation, and alteration in mitochondrial metabolism will lead to a secondary energy failure and programmed neuronal death by means of the activation of the caspase pathways...
June 22, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28648044/dendrons-and-multiarm-polymers-with-thiol-exchangeable-cores-a-reversible-conjugation-platform-for-delivery
#15
Ozgul Gok, Pelin Erturk, Burcu Sumer Bolu, Tugce Nihal Gevrek, Rana Sanyal, Amitav Sanyal
Disulfide exchange reaction has emerged as a powerful tool for reversible conjugation of proteins, peptides and thiol containing molecules to polymeric supports. In particular, the pyridyl disulfide group provides an efficient handle for the site-specific conjugation of therapeutic peptides and proteins bearing cysteine moieties. In this study, novel biodegradable dendritic platforms containing a pyridyl disulfide unit at their focal point were designed. Presence of hydroxyl groups at the periphery of these dendrons allows their elaboration to multivalent initiators that yield poly(ethylene glycol) based multiarm star polymers via controlled radical polymerization...
June 24, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28647884/fluoxetine-induces-apoptosis-through-endoplasmic-reticulum-stress-via-mitogen-activated-protein-kinase-activation-and-histone-hyperacetylation-in-sk-n-be-2-m17-human-neuroblastoma-cells
#16
Ji Hyun Choi, Yeon Ju Jeong, Ah-Ran Yu, Kyung-Sik Yoon, Wonchae Choe, Joohun Ha, Sung Soo Kim, Eui-Ju Yeo, Insug Kang
Fluoxetine (FLX) is an antidepressant drug that belongs to the class of selective serotonin reuptake inhibitors. FLX is known to induce apoptosis in multiple types of cancer cells. In this study, the molecular mechanisms underlying the anti-cancer effects of FLX were investigated in SK-N-BE(2)-M17 human neuroblastoma cells. FLX induced apoptotic cell death, activation of caspase-4, -9, and -3, and expression of endoplasmic reticulum (ER) stress-associated proteins, including C/EBP homologous protein (CHOP)...
June 24, 2017: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/28647734/mir-4673-modulates-paclitaxel-induced-oxidative-stress-and-loss-of-mitochondrial-membrane-potential-by-targeting-8-oxoguanine-dna-glycosylase-1
#17
Hai-Li Huang, Ya-Peng Shi, Hui-Juan He, Ya-Hong Wang, Ting Chen, La-Wei Yang, Teng Yang, Jie Chen, Jun Cao, Wei-Min Yao, Gang Liu
BACKGROUND: Our previous study identified a novel microRNA, miR-4673, which is upregulated in A549 cells exposed to paclitaxel (PTX). In this study, we investigated the role of miR-4673 in PTX-induced cytotoxicity. METHODS: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, apoptosis assay, 5,5',6,6'-Tetrachloro-1,1',3,3'-tetraethyl-imidacarbocyanine iodide (JC-1) staining and 2',7'-Dichlorofluorescein (DCFH) staining were used to evaluate cell viability, apoptosis, mitochondrial membrane potential (MMP) loss and reactive oxygen species (ROS) generation in A549 and H1299 cells...
June 26, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28647693/recognition-investigation-and-management-of-mitochondrial-disease
#18
REVIEW
James E Davison, Shamima Rahman
Mitochondria are dynamic organelles present in virtually all human cells that are needed for a multitude of cellular functions, including energy production, control of cell apoptosis and numerous biochemical catabolic and synthetic pathways that are critical for cellular health. Primary mitochondrial disorders are a group of greater than 200 single gene defects arising from two genomes (nuclear and mitochondrial) leading to mitochondrial dysfunction, and are associated with extremely heterogeneous phenotypes...
June 24, 2017: Archives of Disease in Childhood
https://www.readbyqxmd.com/read/28647370/oleanolic-acid-prevents-cartilage-degeneration-in-diabetic-mice-via-ppar%C3%AE-associated-mitochondrial-stabilization
#19
Xia Kang, Zhikui Yang, Jun Sheng, Jin-Biao Liu, Qing-Yun Xie, Wei Zheng, Ken Chen
Hyperglycemia-induced cartilage degeneration induces osteoarthritis (OA). Since oleanolic acid (OLA) have several pharmacological effects such as anti-inflammatory, anti-oxidant, we hypothesized it possesses protection against high glucose injured cartilage. We now report that OLA decreased type X collagen and reversed the cartilage degeneration in growth plate from db/db mice. OLA increased type Ⅱ collagen expression in a concentration-dependent manner (10-50 μΜ) in high glucose-treated chondrocytes. OLA prevented the high glucose induced cell injury and decreased the level of MMP-13, PGE2 and IL-6 due to decreasing mitochondrial membrane potential and stimulated the ATP production...
June 21, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28647367/mitochondrial-quality-control-pathways-pink1-acts-as-a-gatekeeper
#20
Elvira P Leites, Vanessa A Morais
Mitochondria have a pivotal role in the maintenance of cell homeostasis and survival. Mitochondria are involved in processes such as ATP production, reactive oxygen species production, apoptosis induction, calcium homeostasis and protein degradation. Thus, mechanisms that regulate the intrinsic quality of mitochondria have a crucial role in dictating overall cell fate. The importance of these well-regulated mechanisms is highlighted in disease scenarios such as neurodegeneration, cancer and neuromuscular atrophy...
June 21, 2017: Biochemical and Biophysical Research Communications
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