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autophagy and heat shock protein

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https://www.readbyqxmd.com/read/29596499/specific-protein-carbonylation-in-human-breast-cancer-tissue-compared-to-adjacent-healthy-epithelial-tissue
#1
Baikuntha Aryal, V Ashutosh Rao
Protein carbonylation is an irreversible post-translational modification induced by severe oxidative stress. Reactive oxygen species (ROS) are constantly produced in cells and play important roles in both cancer progression and cancer suppression. ROS levels can be higher in tumor compared to surrounding healthy tissue but ROS-induced specific protein carbonylation and its unique role in cancer progression or suppression is poorly understood. In this study, we utilized previously validated ELISA and western blot methods to analyze the total and specific protein carbonylation in flash-frozen human breast cancer and matched adjacent healthy tissue to compare relative total, and specific protein carbonylation...
2018: PloS One
https://www.readbyqxmd.com/read/29592877/analysis-of-hsp27-and-the-autophagy-marker-lc3b-puncta-following-preoperative-chemotherapy-identifies-high-risk-osteosarcoma-patients
#2
J Andrew Livingston, Wei-Lien Wang, Jen-Wei Tsai, Alexander J Lazar, Cheuk Hong Leung, Heather Lin, Shailesh Advani, Najat Daw, Janice Santiago-O'Farrill, Mario Hollomon, Nancy B Gordon, Eugenie S Kleinerman
Chemotherapy-induced autophagy is a proposed mechanism of chemoresistance and potential therapeutic target in osteosarcoma. We evaluated heat shock protein 27 (HSP27) and autophagy-related proteins as predictors of pathologic treatment response and prognostic markers among osteosarcoma patients who received standard chemotherapy. We analyzed 394 tumor specimens (pre-treatment, post-treatment, and metastases) from 260 osteosarcoma patients by immunohistochemistry for cytoplasmic light chain 3B (LC3B)-positive puncta, sequestosome 1 (SQSTM1), high mobility group box 1 (HMGB1), and HSP27 expression...
March 28, 2018: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/29575081/expression-profiling-of-planarians-shed-light-on-a-dual-role-of-programmed-cell-death-during-the-regeneration
#3
Junsong Yuan, Zhihong Wang, Zhihong Wang, Di Zou, Quekun Peng, Rui Peng, Fangdong Zou
Most animals hold the ability to regenerate damaged cells, tissues, and even any lost part of their bodies. To date, there is little known about the precise regulatory mechanism of regeneration and many fundamental questions remain unanswered. To further understand the precise regulatory mechanism of regeneration, we used planarian Dugesia japonica as a model and sequenced the transcriptomes of their regenerated tissues at different regeneration stages. Through de novo assembly and expression profiling, we found that Heat shock protein and MAPK pathway were involved into early response of regeneration in D...
March 25, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29561705/hsp90-inhibition-targets-autophagy-and-induces-a-casp9-dependent-resistance-mechanism-in-nsclc
#4
Jie Han, Leslie A Goldstein, Wen Hou, Suman Chatterjee, Timothy F Burns, Hannah Rabinowich
Macroautophagy/autophagy has emerged as a resistance mechanism to anticancer drug treatments that induce metabolic stress. Certain tumors, including a subset of KRAS-mutant NSCLCs have been shown to be addicted to autophagy, and potentially vulnerable to autophagy inhibition. Currently, autophagy inhibition is being tested in the clinic as a therapeutic component for tumors that utilize this degradation process as a drug resistance mechanism. The current study provides evidence that HSP90 (heat shock protein 90) inhibition diminishes the expression of ATG7, thereby impeding the cellular capability of mounting an effective autophagic response in NSCLC cells...
March 21, 2018: Autophagy
https://www.readbyqxmd.com/read/29556372/3-epi-12%C3%AE-hydroxyfroside-a-new-cardenolide-induces-cytoprotective-autophagy-via-blocking-the-hsp90-akt-mtor-axis-in-lung-cancer-cells
#5
Yan Sun, Yong-Hao Huang, Feng-Ying Huang, Wen-Li Mei, Quan Liu, Cai-Chun Wang, Ying-Ying Lin, Canhua Huang, Yue-Nan Li, Hao-Fu Dai, Guang-Hong Tan
Rationale: Cardenolides have potential as anticancer drugs. 3'-epi-12β-hydroxyfroside (HyFS) is a new cardenolide structure isolated by our research group, but its molecular mechanisms remain poorly understood. This study investigates the relationship between its antitumor activities and autophagy in lung cancer cells. Methods: Cell growth and proliferation were detected by MTT, lactate dehydrogenase (LDH) release, 5-ethynyl-20-deoxyuridine (EDU) and colony formation assays. Cell apoptosis was detected by flow cytometry...
2018: Theranostics
https://www.readbyqxmd.com/read/29555472/djhsp90s-are-crucial-regulators-during-planarian-regeneration-and-tissue-homeostasis
#6
Zimei Dong, Gengbo Chu, Yingxu Sima, Guangwen Chen
Heat shock protein 90 family members (HSP90s), as molecular chaperones, have conserved roles in the physiological processes of eukaryotes regulating cytoprotection, increasing host resistance and so on. However, whether HSP90s affect regeneration in animals is unclear. Planarians are emerging models for studying regeneration in vivo. Here, the roles of three hsp90 genes from planarian Dugesia japonica are investigated by WISH and RNAi. The results show that: (1) Djhsp90s expressions are induced by heat and cold shock, tissue damage and ionic liquid; (2) Djhsp90s mRNA are mainly distributed each side of the body in intact worms as well as blastemas in regenerative worms; (3) the worms show head regression, lysis, the body curling and the regeneration arrest or even failure after Djhsp90s RNAi; (4) Djhsp90s are involved in autophagy and locomotion of the body...
March 16, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29555102/exploring-the-multifaceted-roles-of-heat-shock-protein-b8-hspb8-in-diseases
#7
REVIEW
Fazhao Li, Han Xiao, Zhiping Hu, Fangfang Zhou, Binbin Yang
HSPB8 is a member of ubiquitous small heat shock protein (sHSP) family, whose expression is induced in response to a wide variety of unfavorable physiological and environmental conditions. Investigation of HSPB8 structure indicated that HSPB8 belongs to the group of so-called intrinsically disordered proteins and possesses a highly flexible structure. Unlike most other sHSPs, HSPB8 tends to form small-molecular-mass oligomers and exhibits substrate-dependent chaperone activity. In cooperation with BAG3, the chaperone activity of HSPB8 was reported to be involved in the delivery of misfolded proteins to the autophagy machinery...
March 13, 2018: European Journal of Cell Biology
https://www.readbyqxmd.com/read/29553885/acute-heat-stress-changes-protein-expression-in-the-testes-of-a-broiler-type-strain-of-taiwan-country-chickens
#8
Shih-Han Wang, Chuen-Yu Cheng, Chao-Jung Chen, Hong-Lin Chan, Hsin-Hsin Chen, Pin-Chi Tang, Chih-Feng Chen, Yen-Pai Lee, San-Yuan Huang
Heat stress leads to decreased fertility in roosters. This study investigated the global protein expression in response to acute heat stress in the testes of a broiler-type strain of Taiwan country chickens (TCCs). Twelve 45-week-old roosters were randomly allocated to the control group maintained at 25°C, and three groups subjected to acute heat stress at 38°C for 4 h, with 0, 2, and 6 h of recovery, respectively. Testis samples were collected for hematoxylin and eosin staining, apoptosis assay, and protein analysis...
March 19, 2018: Animal Biotechnology
https://www.readbyqxmd.com/read/29541415/sensitization-of-multidrug-resistant-cancer-cells-to-hsp90-inhibitors-by-nsaids-induced-apoptotic-and-autophagic-cell-death
#9
Hyun-Jung Moon, Hak-Bong Kim, Su-Hoon Lee, So-Eun Jeun, Chi-Dug Kang, Sun-Hee Kim
NSAIDs (non-steroidal anti-inflammatory drugs) have potential use as anticancer agents, either alone or in combination with other cancer therapies. We found that NSAIDs including celecoxib (CCB) and ibuprofen (IBU) significantly potentiated the cytotoxicity of Hsp90 inhibitors in human multidrug-resistant (MDR) cells expressing high levels of mutant p53 (mutp53) protein and P-glycoprotein (P-gp), and reversed Hsp90 inhibitor resistance caused by activation of heat shock factor 1 (HSF1) and by up-regulation of heat shock proteins (Hsps) and P-gp...
February 16, 2018: Oncotarget
https://www.readbyqxmd.com/read/29516568/maslinic-acid-induces-autophagy-by-down-regulating-hspa8-in-pancreatic-cancer-cells
#10
Ye Tian, Huanli Xu, Ammad Ahmad Farooq, Baozeng Nie, Xiaoliang Chen, Shuonan Su, Ru Yuan, Gan Qiao, Cong Li, Xiao Li, Xiaohui Liu, Xiukun Lin
Maslinic acid (MA), a natural pentacyclictriterpene, displays cytotoxic activity on various types of cancer cells. However, its underlying mechanism is unclear. In this study, we assessed the effect of MA on autophagy of human pancreatic cancer cells, and the potential autophagic pathway was presented. MA inhibited the proliferation and induced autophagy of Panc-28 cells by altering the expressions of autophagy related proteins. SDS-PAGE analysis revealed that one protein band was significantly down-regulated in cells treated with MA, and the band was identified as heat shock protein HSPA8 as analyzed using Western blot and MS, MS/MS approaches...
March 8, 2018: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/29483524/inhibition-of-heat-shock-proteins-hsp90-and-hsp70-induce-oxidative-stress-suppressing-cotton-fiber-development
#11
Anshulika Sable, Krishan M Rai, Amit Choudhary, Vikash K Yadav, Sudhir K Agarwal, Samir V Sawant
Cotton fiber is a specialized unicellular structure useful for the study of cellular differentiation and development. Heat shock proteins (HSPs) have been shown to be involved in various developmental processes. Microarray data analysis of five Gossypium hirsutum genotypes revealed high transcript levels of GhHSP90 and GhHSP70 genes at different stages of fiber development, indicating their importance in the process. Further, we identified 26 and 55 members of HSP90 and HSP70 gene families in G. hirsutum. The treatment of specific inhibitors novobiocin (Nov; HSP90) and pifithrin/2-phenylethynesulfonamide (Pif; HSP70) in in-vitro cultured ovules resulted in a fewer number of fiber initials and retardation in fiber elongation...
February 26, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29465313/cd5l-is-upregulated-in-hepatocellular-carcinoma-and-promotes-liver-cancer-cell-proliferation-and-antiapoptotic-responses-by-binding-to-hspa5-grp78
#12
Gemma Aran, Lucía Sanjurjo, Cristina Bárcena, Marina Simon-Coma, Érica Téllez, Maria Vázquez-Vitali, Marta Garrido, Laura Guerra, Esther Díaz, Isabel Ojanguren, Felix Elortza, Ramon Planas, Margarita Sala, Carolina Armengol, Maria-Rosa Sarrias
CD5-like (CD5L) is a soluble scavenger cysteine-rich protein that modulates inflammatory responses. We studied the involvement of CD5L in liver cancer. Immunohistochemistry (IHC) of CD5L in 60 hepatocellular carcinomas and 34 adjacent nontumor livers, showed that CD5L staining was higher in tumor than in nontumor tissue (Mann-Whitney test; P = 0.0039). High CD5L correlated with elevated proliferation (Ki67, linear regression; P < 0.0001) and lower patient event-free survival (log-rank; P = 0.0185). Accordingly, CD5L expression was detected in the liver cancer cell lines Huh7, HepG2, and SNU-398...
February 20, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29461881/insights-into-macrophage-autophagy-in-latent-tuberculosis-infection-role-of-heat-shock-protein-16-3
#13
Caiqin Zhang, Li Yang, Ningning Zhao, Yong Zhao, Changhong Shi
Tuberculosis (TB) is a major bacterial infectious disease worldwide that is predominantly caused by Mycobacterium tuberculosis (Mtb). The comorbidity of multiple drug-resistant TB strains with HIV and diabetes is widespread. In the presence of these diseases, host immunity is weakened, allowing the recovery of dormant bacilli and leading to recurrent TB infection. As an important component of the host innate and adaptive immune responses, macrophage autophagy plays a significant role in protecting the host against TB...
February 20, 2018: DNA and Cell Biology
https://www.readbyqxmd.com/read/29438359/effects-of-17%C3%AE-estradiol-on-mitophagy-in-the-murine-mc3t3-e1-osteoblast-cell-line-is-mediated-via-g-protein-coupled-estrogen-receptor-and-the-erk1-2-signaling-pathway
#14
Xiaoqi Sun, Xuhao Yang, Yuyan Zhao, Yinan Li, Lei Guo
BACKGROUND Osteoporosis is associated with 17β-estradiol deficiency. The G protein-coupled receptor 30 (GPR30) is known to be an estrogen-responsive receptor, but its role in the degradation of mitochondria in osteoblasts by autophagy, or mitophagy, remains unclear. The aim of this in vitro study was to evaluate the effects of 17β-estradiol, GPR30, and its signaling pathway, on mitophagy in the murine MC3T3-E1 osteoblast cell line. MATERIAL AND METHODS In the murine MC3T3-E1 osteoblast cell line, cells were treated with 17β-estradiol, or G15, a selective GPR30 antagonist, or U0126, a mitogen-activated protein (MAP) kinase (ERK1/2) inhibitor, or with vehicle as control...
February 13, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29436590/17%C3%AE-estradiol-protects-ins-1-insulinoma-cells-from-mitophagy-via-g-protein-coupled-estrogen-receptors-and-the-pi3k-akt-signaling-pathway
#15
Liang Zhang, Yuyan Zhao, Lei Guo
17β-estradiol (17β-E2) is a steroid hormone that is known to exert effects on blood glucose homeostasis. The G protein‑coupled estrogen receptor (GPER) has been identified as a non-genomic estrogenic receptor, and is involved in numerous physiological processes, including cell survival, energy provision and metabolism. 17β-E2 may decrease apoptosis by binding to the GPER. The phosphoinositide 3-kinase (PI3K)/Akt signaling pathway is involved in physiological and pathological functions such as autophagy...
February 7, 2018: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29416717/phosphorylated-heat-shock-protein-27-as-a-potential-biomarker-to-predict-the-role-of-chemotherapy-induced-autophagy-in-osteosarcoma-response-to-therapy
#16
Janice M Santiago-O'Farrill, Eugenie S Kleinerman, Mario G Hollomon, Andrew Livingston, Wei-Lien Wang, Jen-Wei Tsai, Nancy B Gordon
Autophagy is a catabolic process involved in cellular homeostasis. Autophagy is increased above homeostatic levels by chemotherapy, and this can either promote or inhibit tumor growth. We previously demonstrated that aerosol gemcitabine (GCB) has a therapeutic effect against osteosarcoma (OS) lung metastases. However, some tumor cells failed to respond to the treatment and persisted as isolated lung metastasis. Here, we examined the mechanisms underlying the dual role of chemotherapy-induced autophagy in OS and sought to identify biomarkers to predict OS response to treatment...
January 5, 2018: Oncotarget
https://www.readbyqxmd.com/read/29416003/the-antitumor-natural-product-tanshinone-iia-inhibits-protein-kinase-c-and-acts-synergistically-with-17-aag
#17
Chao Lv, Hua-Wu Zeng, Jin-Xin Wang, Xing Yuan, Chuang Zhang, Ting Fang, Pei-Ming Yang, Tong Wu, Yu-Dong Zhou, Dale G Nagle, Wei-Dong Zhang
Tanshinone IIA (Tan IIA), the primary bioactive compound derived from the traditional Chinese medicine (TCM) Salvia miltiorrhiza Bunge, has been reported to possess antitumor activity. However, its antitumor mechanisms are not fully understood. To resolve the potential antitumor mechanism(s) of Tan IIA, its gene expression profiles from our database was analyzed by connectivity map (CMAP) and the CMAP-based mechanistic predictions were confirmed/validated in further studies. Specifically, Tan IIA inhibited total protein kinase C (PKC) activity and selectively suppressed the expression of cytosolic and plasma membrane PKC isoforms ζ and ε...
February 7, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29409895/bcl-2-associated-athanogene-3-bag3-is-an-enhancer-of-small-heat-shock-protein-turnover-via-activation-of-autophagy-in-the-heart
#18
Yui Inomata, Shouta Nagasaka, Kazuki Miyate, Yuta Goto, Chizuru Hino, Chihiro Toukairin, Rieko Higashio, Kinji Ishida, Tomoyuki Saino, Masamichi Hirose, Hideki Tsumura, Atsushi Sanbe
Bcl-2-associated athanogene 3 (BAG3) is strongly expressed in both cardiac and skeletal muscle. A recent study showed that BAG3 may play a protective role in muscles. Little is known, however, regarding the detailed role of BAG3 in cardiac muscle. To better understand the functional role of cardiac BAG3 in the heart, we generated transgenic (TG) mice that overexpress BAG3. A decrease in fractional shortening, and the induction of cardiac atrial natriuretic peptide, were observed in BAG3 TG mice. Moreover, a marked reduction in the protein level of small HSPs was detected in BAG3 TG mouse hearts...
January 31, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29408731/neuronal-specific-impairment-of-heparan-sulfate-degradation-in-drosophila-reveals-pathogenic-mechanisms-for-mucopolysaccharidosis-type-iiia
#19
Dani L Webber, Amanda Choo, Laura J Hewson, Paul J Trim, Marten F Snel, John J Hopwood, Robert I Richards, Kim M Hemsley, Louise V O'Keefe
Mucopolysaccharidosis type IIIA (MPS IIIA) is a lysosomal storage disorder resulting from the deficit of the N-sulfoglucosamine sulfohydrolase (SGSH) enzyme that leads to accumulation of partially-degraded heparan sulfate. MPS IIIA is characterized by severe neurological symptoms, clinically presenting as Sanfilippo syndrome, for which no effective therapy is available. The lysosomal SGSH enzyme is conserved in Drosophila and we have identified increased levels of heparan sulfate in flies with ubiquitous knockdown of SGSH/CG14291...
February 1, 2018: Experimental Neurology
https://www.readbyqxmd.com/read/29361800/heat-shock-proteins-and-autophagy-pathways-in-neuroprotection-from-molecular-bases-to-pharmacological-interventions
#20
REVIEW
Botond Penke, Ferenc Bogár, Tim Crul, Miklós Sántha, Melinda E Tóth, László Vígh
Neurodegenerative diseases (NDDs) such as Alzheimer's disease, Parkinson's disease and Huntington's disease (HD), amyotrophic lateral sclerosis, and prion diseases are all characterized by the accumulation of protein aggregates (amyloids) into inclusions and/or plaques. The ubiquitous presence of amyloids in NDDs suggests the involvement of disturbed protein homeostasis (proteostasis) in the underlying pathomechanisms. This review summarizes specific mechanisms that maintain proteostasis, including molecular chaperons, the ubiquitin-proteasome system (UPS), endoplasmic reticulum associated degradation (ERAD), and different autophagic pathways (chaperon mediated-, micro-, and macro-autophagy)...
January 22, 2018: International Journal of Molecular Sciences
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