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Glucose related protein 78 kDa

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https://www.readbyqxmd.com/read/29734677/the-effect-of-bornyl-cis-4-hydroxycinnamate-on-melanoma-cell-apoptosis-is-associated-with-mitochondrial-dysfunction-and-endoplasmic-reticulum-stress
#1
Tzu-Yen Yang, Yu-Jen Wu, Chi-I Chang, Chien-Chih Chiu, Mei-Li Wu
Bornyl cis -4-hydroxycinnamate, an active compound isolated from Piper betle stems, was investigated in terms of its effects on A2058 and A375 melanoma cell proliferation and protein expression in this study. We used flow cytometric analysis to examine the early stages of apoptosis induced by bornyl cis -4-hydroxycinnamate in the two melanoma cell lines and employed comparative proteomic analysis to investigate the effects of this compound on protein expression in A375 cells. Master maps generated by PDQuest software from two-dimensional electrophoresis (2-DE) analysis of A375 cells showed that the expression levels of 35 proteins were significantly altered, with 18 proteins upregulated and 17 downregulated...
May 4, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29650944/glucose-related-protein-78-expression-and-its-effects-on-cisplatin-resistance-in-cervical-cancer
#2
Chengyan Luo, Wen Fan, Yi Jiang, Shulin Zhou, Wenjun Cheng
BACKGROUND GRP78, the 78-kDa glucose-regulated protein, occupies a significant position in endoplasmic reticulum stress. Emerging evidences have shown that GRP78 induces chemoresistance in several tumors; however, the role of GRP78 in cervical cancer (CVC) still needs to be elucidated clearly. MATERIAL AND METHODS In the present study, we determined the expression levels of GRP78 in CVC tissues collected from patients through immuocytochemistry, western blot and real-time PCR. To evaluate the exact role of GRP78 in CVC cells in the presence of cisplatin, we generated GRP78 knock-down cervical cancer cells through small interfering RNA...
April 13, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29625179/proteostasis-in-epicardial-versus-subcutaneous-adipose-tissue-in-heart-failure-subjects-with-and-without-diabetes
#3
A Burgeiro, A C Fonseca, D Espinoza, L Carvalho, N Lourenço, M Antunes, E Carvalho
BACKGROUND: Cardiovascular diseases (CVDs) are leading cause of death and primary cause of morbidity and mortality in diabetic population. Epicardial adipose tissue (EAT) covers the heart's surface and is a source of biomolecules regulating heart and blood vessel physiology. The protective activation of the unfolded protein response (UPR) and autophagy allows the cardiomyocyte reticular network to restore energy and/or nutrient homeostasis and to avoid cell death. However, an excessive or prolonged UPR activation can trigger cell death...
April 3, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29593095/loss-of-function-pcsk9-mutants-evade-the-unfolded-protein-response-sensor-grp78-and-fail-to-induce-endoplasmic-reticulum-stress-when-retained
#4
Paul Lebeau, Khrystyna Platko, Ali A Al-Hashimi, Jae Hyun Byun, Šárka Lhoták, Nicholas Holzapfel, Gabriel Gyulay, Suleiman A Igdoura, David Cool, Bernardo Trigatti, Nabil G Seidah, Richard C Austin
The proprotein convertase subtilisin/kexin type-9 (PCSK9) plays a central role in cardiovascular disease (CVD) by degrading hepatic low-density lipoprotein receptor (LDLR). As such, loss-of-function (LOF) PCSK9 variants that fail to exit the endoplasmic reticulum (ER) increase hepatic LDLR levels and lower the risk of developing CVD. The retention of misfolded protein in the ER can cause ER stress and activate the unfolded protein response (UPR); in this study, we investigated whether a variety of LOF PCSK9 variants that are retained in the ER can cause ER stress and hepatic cytotoxicity...
March 28, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29592873/atorvastatin-ameliorates-early-brain-injury-through-inhibition-of-apoptosis-and-er-stress-in-a-rat-model-of-subarachnoid-hemorrhage
#5
Wentao Qi, Demao Cao, Yucheng Li, Aijun Peng, Youwei Wang, Kai Gao, Cunshan Tao, Yongkang Wu
Objective: Aneurysmal subarachnoid hemorrhage (SAH) is a severe cerebrovascular disease with very poor prognosis. The aim of this study was to evaluate the protective effects of atorvastatin on early brain injury (EBI) after SAH using a perforation SAH model. Methods: Male Sprague-Dawley rats were randomly divided into four groups: the sham group, the SAH group (model group), SAH + 10 mg·kg-1 ·d-1 atorvastatin (low atorvastatin group), and SAH + 20 mg·kg-1 ·d-1 atorvastatin (high atorvastatin group). Atorvastatin was administered orally by gastric gavage for 15 days before operation...
March 28, 2018: Bioscience Reports
https://www.readbyqxmd.com/read/29565511/protective-effect-of-resveratrol-on-kidney-in-rats-with-diabetic-nephropathy-and-its-effect-on-endoplasmic-reticulum-stress
#6
D Yuan, X-M Liu, Z Fang, L-L Du, J Chang, S-H Lin
OBJECTIVE: Diabetic nephropathy (DN) can cause chronic renal insufficiency and significantly reduce the life quality of patients with diabetes mellitus, and may eventually lead to death. The study investigated the expression of endoplasmic reticulum stress-related factors, which have important roles in the progress of DN and to explore effects of resveratrol on DN and the possible mechanism. MATERIALS AND METHODS: Specific pathogen free (SPF) grade healthy male Sprague Dawley (SD) rats were divided into different groups for different treatments...
March 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29547667/comparison-of-secretome-from-osteoblasts-derived-from-sclerotic-versus-non-sclerotic-subchondral-bone-in-oa-a-pilot-study
#7
Christelle Sanchez, Gabriel Mazzucchelli, Cécile Lambert, Fanny Comblain, Edwin DePauw, Yves Henrotin
OBJECTIVE: Osteoarthritis (OA) is characterized by cartilage degradation but also by other joint tissues modifications like subchondral bone sclerosis. In this study, we used a proteomic approach to compare secretome of osteoblast isolated from sclerotic (SC) or non sclerotic (NSC) area of OA subchondral bone. DESIGN: Secretome was analyzed using differential quantitative and relative label free analysis on nanoUPLC G2 HDMS system. mRNA of the more differentially secreted proteins were quantified by RT-PCR in cell culture from 5 other patients...
2018: PloS One
https://www.readbyqxmd.com/read/29424794/crocin-alleviates-myocardial-ischemia-reperfusion-induced-endoplasmic-reticulum-stress-via-regulation-of-mir-34a-sirt1-nrf2-pathway
#8
Xiaowu Wang, Binbin Yuan, Biao Cheng, Ying Liu, Ben Zhang, Xianyue Wang, Xi Lin, Bo Yang, Gu Gong
Endoplasmic reticulum (ER) stress is associated with ischemia/reperfusion (I/R)-induced cardiomyocyte apoptosis. Crocin could protect myocardial cells against I/R injury and suppress ER stress. This study aimed to explore the molecular mechanism of crocin related to ER stress in myocardial I/R injury. We found crocin alleviated I/R-induced cardiomyocyte apoptosis both in I/R-induced primary cardiomyocytes and in mouse models. The expression of Bax, active caspase 3, Glucose-regulated protein of 78 kDa (GRP78), and C/EBP homologous protein (CHOP) induced by I/R injury was reduced, whereas Bcl-2 expression was enhanced by crocin, the effect of which was abrogated by ER stress activator thapsigargin treatment...
February 8, 2018: Shock
https://www.readbyqxmd.com/read/29354786/regulation-of-the-endoplasmic-reticulum-stress-by-bip-grp78-is-involved-in-meiotic-maturation-of-porcine-oocytes-in-vitro
#9
Hyo-Jin Park, Jae-Young Park, Jin-Woo Kim, Seul-Gi Yang, Jae-Min Jung, Min-Ji Kim, Joung Jun Park, Deog-Bon Koo
In the present study, we investigated the role of binding immunoglobulin protein/glucose-regulated protein, 78-kDa (BIP/GRP78)-regulated endoplasmic reticulum (ER)-stress on meiotic maturation and cumulus cells expansion in porcine cumulus-oocyte complexes (COCs). Previously, it has been demonstrated that unfolded protein response (UPR)-related genes, such as molecules involved in ER-stress defense mechanisms, were expressed in matured oocytes and cumulus cells during in vitro maturation (IVM) of porcine oocytes...
December 2017: Balsaeng'gwa Saengsig
https://www.readbyqxmd.com/read/28962181/tauroursodeoxycholic-acid-attenuates-endoplasmic-reticulum-stress-and-protects-the-liver-from-chronic-intermittent-hypoxia-induced-injury
#10
Yanpeng Hou, Huai'an Yang, Zeshi Cui, Xuhui Tai, Yanling Chu, Xing Guo
Obstructive sleep apnea that characterized by chronic intermittent hypoxia (CIH) has been reported to associate with chronic liver injury. Tauroursodeoxycholic acid (TUDCA) exerts liver-protective effects in various liver diseases. The purpose of this study was to test the hypothesis that TUDCA could protect liver against CIH injury. C57BL/6 mice were subjected to intermittent hypoxia for eight weeks and applied with TUDCA by intraperitoneal injection. The effect of TUDCA on liver histological changes, liver function, oxidative stress, inflammatory response, hepatocyte apoptosis and endoplasmic reticulum (ER) stress were investigated...
September 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28870813/atp-independent-inhibition-of-amyloid-beta-fibrillation-by-the-endoplasmic-reticulum-resident-molecular-chaperone-grp78
#11
Masafumi Sakono, Tomoya Kidani
Neuronal cell death induced by an accumulation of amyloid beta (Aβ) peptides, which are pathogenic molecules for Alzheimer's disease, is closely related with endoplasmic reticulum (ER) stress. In the ER stress condition, part of the ER resident chaperones is known to be translocated to another cellular location, such as the cell surface. The ER chaperone 78-kDa glucose-regulated protein (GRP78), which shows ATP-dependent chaperone activity, also shows translocation to the cell surface. In this study, we examined the influence of GRP78 on Aβ fibrillation in the presence or absence of ATP...
November 4, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28498407/respiratory-syncytial-virus-infection-accelerates-lung-fibrosis-through-the-unfolded-protein-response-in-a-bleomycin-induced-pulmonary-fibrosis-animal-model
#12
Lina Wang, Wei Cheng, Zhimin Zhang
Emerging evidence has demonstrated that endoplasmic reticulum stress (ER) is involved in the pathogenesis of idiopathic pulmonary fibrosis, however, the underlying mechanism remains unclear. Viral infection often triggers a hyperinflammatory response by an expansion of the ER. The present study was designed to observe the role of respiratory syncytial virus infection (RSV)‑induced ER stress on lung fibrosis. In order to determine the role of ER stress on the onset and progression of pulmonary fibrosis, mice received an intratracheal combined injection of RSV and bleomycin on day 0...
July 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28497987/elevated-activating-transcription-factor-4-and-glucose-regulated-78-kda-protein-levels-correlate-with-inflammatory-cytokines-in-the-aqueous-humor-and-vitreous-of-proliferative-diabetic-retinopathy
#13
Yanuo Wang, Sha Gao, Yanji Zhu, Xi Shen
PURPOSE: To determine concentrations of endoplasmic reticulum (ER) stress-related factors activating transcription factor 4 (ATF4) and glucose-regulated 78 kDa protein (GRP78) in vitreous and aqueous humor (AqH) of patients with proliferative diabetic retinopathy (PDR) and the correlation of ATF4, GRP78 and inflammatory cytokines interleukin-6(IL-6) and monocyte chemoattractant protein-1 (MCP-1). MATERIALS AND METHODS: AqH and vitreous samples were collected from eyes of patients with PDR and idiopathic macular hole (IMH) which needed vitrectomy...
August 2017: Current Eye Research
https://www.readbyqxmd.com/read/28424579/grp78-at-the-centre-of-the-stage-in-cancer-and-neuroprotection
#14
REVIEW
Caty Casas
The 78-kDa glucose-regulated protein GRP78, also known as BiP and HSP5a, is a multifunctional protein with activities far beyond its well-known role in the unfolded protein response (UPR) which is activated after endoplasmic reticulum (ER) stress in the cells. Most of these newly discovered activities depend on its position within the cell. GRP78 is located mainly in the ER, but it has also been observed in the cytoplasm, the mitochondria, the nucleus, the plasma membrane, and secreted, although it is dedicated mostly to engage endogenous cytoprotective processes...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28103301/differences-in-beef-quality-between-angus-bos-taurus-taurus-and-nellore-bos-taurus-indicus-cattle-through-a-proteomic-and-phosphoproteomic-approach
#15
COMPARATIVE STUDY
Rafael Torres de Souza Rodrigues, Mario Luiz Chizzotti, Camilo Elber Vital, Maria Cristina Baracat-Pereira, Edvaldo Barros, Karina Costa Busato, Rafael Aparecido Gomes, Márcio Machado Ladeira, Taiane da Silva Martins
Proteins are the major constituents of muscle and are key molecules regulating the metabolic changes during conversion of muscle to meat. Brazil is one of the largest exporters of beef and most Brazilian cattle are composed by zebu (Nellore) genotype. Bos indicus beef is generally leaner and tougher than Bos taurus such as Angus. The aim of this study was to compare the muscle proteomic and phosphoproteomic profile of Angus and Nellore. Seven animals of each breed previously subjected the same growth management were confined for 84 days...
2017: PloS One
https://www.readbyqxmd.com/read/28012149/endoplasmic-reticulum-stress-and-apoptosis-triggered-by-sub-chronic-lead-exposure-in-mice-spleen-a-histopathological-study
#16
Giovanni Corsetti, Claudia Romano, Alessandra Stacchiotti, Evasio Pasini, Francesco S Dioguardi
Lead (Pb) is an environmental oncogenic metal that induces immunotoxicity and anaemia. Emerging evidence has linked Pb toxicity with endoplasmic reticulum-driven apoptosis and autophagy. Glucose-regulated protein of 78 kDa (Grp78 or binding immunoglobulin protein (BiP)), a master endoplasmic reticulum chaperone, drives macrophage activation and regulates protein folding and calcium flux in response to heavy metals. The spleen may be involved in Pb poisoning due to its crucial role in erythrocatheresis and immune response, although there are no data to support this theory...
July 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/27995330/piceatannol-attenuates-homocysteine-induced-endoplasmic-reticulum-stress-and-endothelial-cell-damage-via-heme-oxygenase-1-expression
#17
Jin-Sang Kil, Sun-Oh Jeong, Hun-Taeg Chung, Hyun-Ock Pae
A growing body of evidence implicates endoplasmic reticulum (ER)-induced cellular dysfunction and apoptosis as important factors to a variety of diseases. In endothelial cells (ECs), the sulfur-containing amino acid homocysteine (Hcy) causes EC apoptosis and reactive oxygen species (ROS) generation through induction of ER stress. Here, we have investigated whether piceatannol (Pic), a resveratrol analog, could protect ECs against Hcy-induced apoptosis, oxidative stress and ER stress, with specific emphasis on heme oxygenase-1 (HO-1)...
April 2017: Amino Acids
https://www.readbyqxmd.com/read/27824068/sulforaphane-improves-ischemia-induced-detrusor-overactivity-by-downregulating-the-enhancement-of-associated-endoplasmic-reticulum-stress-autophagy-and-apoptosis-in-rat-bladder
#18
Huai-Ching Tai, Shiu-Dong Chung, Chiang-Ting Chien, Hong-Jeng Yu
Atherosclerosis-associated pelvic ischemia has been reported to be a risk factor for bladder dysfunction and subsequent lower urinary tract symptoms (LUTS) in the elderly population. However, the molecular mechanisms of this association remain unclear. We hypothesized that stress-induced cellular responses might play a role in the pathogenesis of ischemia-induced bladder dysfunction. In the present study, the animal model of bladder ischemia was induced by bilateral partial arterial occlusion (BPAO) in rats...
November 8, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27651773/endoplasmic-reticulum-stress-induced-apoptosis-in-the-penumbra-aggravates-secondary-damage-in-rats-with-traumatic-brain-injury
#19
Guo-Zhu Sun, Fen-Fei Gao, Zong-Mao Zhao, Hai Sun, Wei Xu, Li-Wei Wu, Yong-Chang He
Neuronal apoptosis is mediated by intrinsic and extrinsic signaling pathways such as the membrane-mediated, mitochondrial, and endoplasmic reticulum stress pathways. Few studies have examined the endoplasmic reticulum-mediated apoptosis pathway in the penumbra after traumatic brain injury, and it remains unclear whether endoplasmic reticulum stress can activate the caspase-12-dependent apoptotic pathway in the traumatic penumbra. Here, we established rat models of fluid percussion-induced traumatic brain injury and found that protein expression of caspase-12, caspase-3 and the endoplasmic reticulum stress marker 78 kDa glucose-regulated protein increased in the traumatic penumbra 6 hours after injury and peaked at 24 hours...
August 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27634226/reduction-of-hypothalamic-endoplasmic-reticulum-stress-activates-browning-of-white-fat-and-ameliorates-obesity
#20
Cristina Contreras, Ismael González-García, Patricia Seoane-Collazo, Noelia Martínez-Sánchez, Laura Liñares-Pose, Eva Rial-Pensado, Johan Fernø, Manuel Tena-Sempere, Núria Casals, Carlos Diéguez, Rubén Nogueiras, Miguel López
The chaperone GRP78/BiP (glucose-regulated protein 78 kDa/binding immunoglobulin protein) modulates protein folding in reply to cellular insults that lead to endoplasmic reticulum (ER) stress. This study investigated the role of hypothalamic GRP78 on energy balance, with particular interest in thermogenesis and browning of white adipose tissue (WAT). For this purpose, we used diet-induced obese rats and rats administered thapsigargin, and by combining metabolic, histologic, physiologic, pharmacologic, thermographic, and molecular techniques, we studied the effect of genetic manipulation of hypothalamic GRP78...
January 2017: Diabetes
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