نتایج جستجو برای: پروتئین grp78

تعداد نتایج: 19694  

Journal: :Molecular and cellular biology 1988
S S Watowich R I Morimoto

We have isolated a human genomic clone that encodes the glucose-responsive protein GRP78 and have used this cloned gene probe, together with a cloned HSP70 gene, to study the expression of both stress-induced genes in response to inhibitors of cellular metabolism. On the basis of the effects of this group of chemicals on GRP78 and HSP70 expression, we have identified three classes of stress gen...

Journal: :The Journal of biological chemistry 2009
Shirin Doroudgar Donna J Thuerauf Marie C Marcinko Peter J Belmont Christopher C Glembotski

Stresses that perturb the folding of nascent endoplasmic reticulum (ER) proteins activate the ER stress response. Upon ER stress, ER-associated ATF6 is cleaved; the resulting active cytosolic fragment of ATF6 translocates to the nucleus, binds to ER stress response elements (ERSEs), and induces genes, including the ER-targeted chaperone, GRP78. Recent studies showed that nutrient and oxygen sta...

2012
Shiuan Wey Biquan Luo Amy S. Lee

GRP78, a master regulator of the unfolded protein response (UPR) and cell signaling, is required for inner cell mass survival during early embryonic development. However, little is known about its role in adult hematopoietic stem cells (HSCs) and hematopoiesis. Here we generated a conditional knockout mouse model that acutely deletes Grp78 in the adult hematopoietic system. Acute GRP78 ablation...

2006
Svetlana P. Ermakova Bong Seok Kang Bu Young Choi Hong Seok Choi Todd F. Schuster Wei-Ya Ma Ann M. Bode Zigang Dong

Many beneficial properties have been attributed to ( ) epigallocatechin gallate (EGCG), including chemopreventive, anticarcinogenic, and antioxidant actions. In this study, we investigated the effects of EGCG on the function of glucoseregulated protein 78 (GRP78), which is associated with the multidrug resistance phenotype of many types of cancer cells. Our investigation was directed at elucida...

Journal: :Cancer research 2007
Yong Fu Jianze Li Amy S Lee

The recent development of hormonal therapy that blocks estrogen synthesis represents a major advance in the treatment of estrogen receptor-positive breast cancer. However, cancer cells often acquire adaptations resulting in resistance. A recent report reveals that estrogen starvation-induced apoptosis of breast cancer cells requires BIK, an apoptotic BH3-only protein located primarily at the en...

Journal: :Oncology reports 2011
Toshikazu Suzuki Jun Lu Gaofeng Hu Kazuko Kita Nobuo Suzuki

Glucose-regulated protein 78 (GRP78) is expressed abundantly in various types of cancer cells and is believed to contribute to chemotherapeutic resistance. In this study, we investigated the effect of a continuous approach for the expression of a short hairpin RNA (shRNA) targeted to GRP78 with retrovirus transduction on the sensitivity to the anticancer drugs VP-16 and cisplatin. The reduction...

2014
Zongwei Li Yingying Wang Haili Wu Lichao Zhang Peng Yang Zhuoyu Li

To support the high rates of proliferation, cancer cells undergo the metabolic reprogramming: aerobic glycolysis and glutamine addiction. Though glucose regulated protein 78 (GRP78) is a glucose-sensing protein and frequently highly expressed in tumor cells, its roles in glucose and glutamine metabolic regulation remain poorly unknown. We report here that glucose deficiency-induced GRP78 enhanc...

2017
Jun Hee Lee Yeo Min Yoon Sang Hun Lee

Mesenchymal stem cells (MSC) are ideal materials for stem cell-based therapy. As MSCs reside in hypoxic microenvironments (low oxygen tension of 1% to 7%), several studies have focused on the beneficial effects of hypoxic preconditioning on MSC survival; however, the mechanisms underlying such effects remain unclear. This study aimed to uncover the potential mechanism involving 78-kDa glucose-r...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Jieli Shen Dat P Ha Genyuan Zhu Daisy F Rangel Agnieszka Kobielak Parkash S Gill Susan Groshen Louis Dubeau Amy S Lee

Pancreatic ductal adenocarcinoma (PDAC) remains a highly lethal disease in critical need of new therapeutic strategies. Here, we report that the stress-inducible 78-kDa glucose-regulated protein (GRP78/HSPA5), a key regulator of endoplasmic reticulum homeostasis and PI3K/AKT signaling, is overexpressed in the acini and PDAC of Pdx1-Cre;KrasG12D/+;p53f/+ (PKC) mice as early as 2 mo, suggesting t...

2016
Muyang Yang Fan Zhang Kai Qin Min Wu Heli Li Huifen Zhu Qin Ning Ping Lei Guanxin Shen

The 78-kDa glucose-regulated protein (Grp78) is stress-inducible chaperone that mostly reside in the endoplasmic reticulum. Grp78 has been described to be released at times of cellular stress and as having extracellular properties that are anti-inflammatory or favor the resolution of inflammation. As antigen-presenting cells (APCs) play a critical role in both the priming of adaptive immune res...

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