Hypoxia-Inducible Factor 1, alpha Subunit

Publication Title: 
Experimental Gerontology

Aging is associated with high incidence of ischemic diseases, which go along with a drop in tissue oxygenation. At the molecular level the hypoxia inducible factor (HIF) is the master regulator for hypoxia-induced gene expression. Recent studies demonstrated age-related changes in the HIF system, which might explain the reduced ability to cope with hypoxia in elderly. There are also some evidences that HIF is functionally connected to the aging process itself.

Author(s): 
Katschinski, Dˆrthe M.
Publication Title: 
British Journal of Pharmacology

BACKGROUND AND PURPOSE: Artemisinin is an antimalarial drug exerting pleiotropic effects, such as the inhibition of the transcription factor nuclear factor-kappa B and of the sarcoplasmic/endoplasmic reticulum Ca(++)-ATPase (SERCA) of P. falciparum.

Author(s): 
Riganti, C.
Doublier, S.
Viarisio, D.
Miraglia, E.
Pescarmona, G.
Ghigo, D.
Bosia, A.
Publication Title: 
Neuro-Oncology

BACKGROUND: A proportion of glioblastoma stemlike cells (GSCs) expressing endothelial cell marker CDH5 (vascular-endothelial-cadherin or CD144) can transdifferentiate into endothelial cells and form blood vessels. However, the implications of CDH5 expression in gliomas and how it is regulated in GSCs remain to be clarified. METHODS: The mRNA and protein levels of CDH5 were detected in glioma samples and cultured cell lines, and the prognostic value of the CDH5 expression level for GBM patients was evaluated.

Author(s): 
Mao, Xing-Gang
Xue, Xiao-Yan
Wang, Liang
Zhang, Xiang
Yan, Ming
Tu, Yan-yang
Lin, Wei
Jiang, Xiao-Fan
Ren, Hong-Gang
Zhang, Wei
Song, Shao-Jun
Publication Title: 
Molecular Biology of the Cell

Increased expression of vascular endothelial growth factor (VEGF) contributes to the growth of many tumors by increasing angiogenesis. Although hypoxia is a potent inducer of VEGF, we previously showed that epidermal growth factor receptor amplification and loss of PTEN, both of which can increase phosphatidylinositol-3-kinase (PI3K) activity, increase VEGF expression.

Author(s): 
Pore, Nabendu
Liu, Shuang
Shu, Hui-Kuo
Li, Bin
Haas-Kogan, Daphne
Stokoe, David
Milanini-Mongiat, Julie
Pages, Gilles
O'Rourke, Donald M.
Bernhard, Eric
Maity, Amit
Publication Title: 
Gastroenterology

BACKGROUND & AIMS: Cholestasis contributes to hepatocellular injury and promotes liver carcinogenesis. We created a mouse model of chronic cholestasis to study its effects on progression of cholangiocarcinoma and the oncogenes involved. METHODS: To induce chronic cholestasis, Balb/c mice were given 2 weekly intraperitoneal injections of diethylnitrosamine (DEN); 2 weeks later, some mice also received left and median bile duct ligation (LMBDL) and, then 1 week later, were fed DEN, in corn oil, weekly by oral gavage (DLD).

Author(s): 
Yang, Heping
Li, Tony W. H.
Peng, Jian
Tang, Xiaoli
Ko, Kwang Suk
Xia, Meng
Aller, Maria-Angeles
Publication Title: 
PloS One

Sulforaphane (SFN) is a dietary cancer preventive with incompletely characterized mechanism(s) of cancer prevention. Since prostaglandin E2 (PGE2) promotes cancer progression, we hypothesized that SFN may block PGE2 synthesis in cancer cells. We found that SFN indeed blocked PGE2 production in human A549 cancer cells not by inhibiting COX-2, but rather by suppressing the expression of microsomal prostaglandin E synthase (mPGES-1), the enzyme that directly synthesizes PGE2. We identified the Hypoxia Inducible Factor 1 alpha (HIF-1α) as the target of SFN-mediated mPGES-1 suppression.

Author(s): 
Zhou, Jiping
Joplin, Denise G.
Cross, Janet V.
Templeton, Dennis J.
Publication Title: 
PloS One

BACKGROUND: Cancer is one of the highly virulent diseases known to humankind with a high mortality rate. Breast cancer is the most common cancer in women worldwide. Sorghum is a principal cereal food in many parts of the world, and is critical in folk medicine of Asia and Africa. In the present study, we analyzed the effects of HSE in metastatic breast cancer. METHODOLOGY/PRINCIPAL FINDINGS: Preliminary studies conducted on MDA-MB 231 and MCF-7 xenograft models showed tumor growth suppression by HSE.

Author(s): 
Park, Jin Hee
Darvin, Pramod
Lim, Eun Joung
Joung, Youn Hee
Hong, Dae Young
Park, Eui U.
Park, Seung Hwa
Choi, Soo Keun
Moon, Eon-Soo
Cho, Byung Wook
Park, Kyung Do
Lee, Hak Kyo
Kim, Myong-Jo
Park, Dong-Sik
Chung, Ill-Min
Yang, Young Mok
Publication Title: 
Carcinogenesis

Grape seed extract (GSE) is a widely consumed dietary supplement that has antitumor activity. Here, we have investigated the inhibitory effect of GSE on the expression of vascular endothelial growth factor (VEGF) and the mechanism underlying this action. We found that GSE inhibited VEGF messenger RNA (mRNA) and protein expression in U251 human glioma cells and MDA-MB-231 human breast cancer cells. GSE inhibited transcriptional activation of the VEGF gene through reducing protein but not mRNA expression of hypoxia-inducible factor (HIF) 1alpha.

Author(s): 
Lu, Jianming
Zhang, Keqiang
Chen, Shiuan
Wen, Wei
Publication Title: 
Circulation

BACKGROUND: The most important determinant of longevity in pulmonary arterial hypertension is right ventricular (RV) function, but in contrast to experimental work elucidating the pathobiology of left ventricular failure, there is a paucity of data on the cellular and molecular mechanisms of RV failure.

Author(s): 
Bogaard, Harm J.
Natarajan, Ramesh
Henderson, Scott C.
Long, Carlin S.
Kraskauskas, Donatas
Smithson, Lisa
Ockaili, Ramzi
McCord, Joe M.
Voelkel, Norbert F.
Publication Title: 
PloS One

BACKGROUND: Cancer is one of the highly virulent diseases known to humankind with a high mortality rate. Breast cancer is the most common cancer in women worldwide. Sorghum is a principal cereal food in many parts of the world, and is critical in folk medicine of Asia and Africa. In the present study, we analyzed the effects of HSE in metastatic breast cancer. METHODOLOGY/PRINCIPAL FINDINGS: Preliminary studies conducted on MDA-MB 231 and MCF-7 xenograft models showed tumor growth suppression by HSE.

Author(s): 
Park, Jin Hee
Darvin, Pramod
Lim, Eun Joung
Joung, Youn Hee
Hong, Dae Young
Park, Eui U.
Park, Seung Hwa
Choi, Soo Keun
Moon, Eon-Soo
Cho, Byung Wook
Park, Kyung Do
Lee, Hak Kyo
Kim, Myong-Jo
Park, Dong-Sik
Chung, Ill-Min
Yang, Young Mok

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