STAT3 Transcription Factor

Publication Title: 
Molecular cancer research: MCR

The activation of signal transducers and activators of transcription 3 (STAT3) has been linked with carcinogenesis through survival, proliferation, and angiogenesis of tumor cells. Agents that can suppress STAT3 activation have potential not only for prevention but also for treatment of cancer. In the present report, we investigated whether 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin), an analogue of vitamin K, and isolated from chitrak (Plumbago zeylanica), an Ayurvedic medicinal plant, can modulate the STAT3 pathway.

Author(s): 
Sandur, Santosh K.
Pandey, Manoj K.
Sung, Bokyung
Aggarwal, Bharat B.
Publication Title: 
Carcinogenesis

We have shown previously that withaferin A (WA), a promising anticancer constituent of Ayurvedic medicine plant Withania somnifera, inhibits growth of human breast cancer cells in culture and in vivo in association with apoptosis induction. The present study builds on these observations and demonstrates that WA inhibits constitutive as well as interleukin-6 (IL-6)-inducible activation of signal transducer and activator of transcription 3 (STAT3), which is an oncogenic transcription factor activated in many human malignancies including breast cancer.

Author(s): 
Lee, Joomin
Hahm, Eun-Ryeong
Singh, Shivendra V.
Publication Title: 
Cancer Prevention Research (Philadelphia, Pa.)

Chemoprevention of head and neck squamous cell carcinoma (HNSCC), a disease associated with high mortality rates and frequent occurrence of second primary tumor (SPT), is an important clinical goal. The epidermal growth factor receptor (EGFR)-signal transducer and activator of transcription (STAT)-3 signaling pathway is known to play a key role in HNSCC growth, survival, and prognosis, thereby serving as a potential therapeutic target in the treatment of HNSCC.

Author(s): 
Leeman-Neill, Rebecca J.
Seethala, Raja R.
Singh, Shivendra V.
Freilino, Maria L.
Bednash, Joseph S.
Thomas, Sufi M.
Panahandeh, Mary C.
Gooding, William E.
Joyce, Sonali C.
Lingen, Mark W.
Neill, Daniel B.
Grandis, Jennifer R.
Publication Title: 
Molecular cancer research: MCR

The activation of signal transducers and activators of transcription 3 (STAT3) has been linked with carcinogenesis through survival, proliferation, and angiogenesis of tumor cells. Agents that can suppress STAT3 activation have potential not only for prevention but also for treatment of cancer. In the present report, we investigated whether 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin), an analogue of vitamin K, and isolated from chitrak (Plumbago zeylanica), an Ayurvedic medicinal plant, can modulate the STAT3 pathway.

Author(s): 
Sandur, Santosh K.
Pandey, Manoj K.
Sung, Bokyung
Aggarwal, Bharat B.
Publication Title: 
Carcinogenesis

We have shown previously that withaferin A (WA), a promising anticancer constituent of Ayurvedic medicine plant Withania somnifera, inhibits growth of human breast cancer cells in culture and in vivo in association with apoptosis induction. The present study builds on these observations and demonstrates that WA inhibits constitutive as well as interleukin-6 (IL-6)-inducible activation of signal transducer and activator of transcription 3 (STAT3), which is an oncogenic transcription factor activated in many human malignancies including breast cancer.

Author(s): 
Lee, Joomin
Hahm, Eun-Ryeong
Singh, Shivendra V.
Publication Title: 
Cancer Prevention Research (Philadelphia, Pa.)

Chemoprevention of head and neck squamous cell carcinoma (HNSCC), a disease associated with high mortality rates and frequent occurrence of second primary tumor (SPT), is an important clinical goal. The epidermal growth factor receptor (EGFR)-signal transducer and activator of transcription (STAT)-3 signaling pathway is known to play a key role in HNSCC growth, survival, and prognosis, thereby serving as a potential therapeutic target in the treatment of HNSCC.

Author(s): 
Leeman-Neill, Rebecca J.
Seethala, Raja R.
Singh, Shivendra V.
Freilino, Maria L.
Bednash, Joseph S.
Thomas, Sufi M.
Panahandeh, Mary C.
Gooding, William E.
Joyce, Sonali C.
Lingen, Mark W.
Neill, Daniel B.
Grandis, Jennifer R.
Publication Title: 
Molecular cancer research: MCR

Mesothelin (MSLN) is a cell surface glycoprotein that is overexpressed in human pancreatic cancer. Although its value as a tumor marker for diagnosis and prognosis and as a preferred target of immunointervention has been evaluated, there is little information on the growth advantage of MSLN on tumor cells.

Author(s): 
Bharadwaj, Uddalak
Li, Min
Chen, Changyi
Yao, Qizhi
Publication Title: 
Hepatology (Baltimore, Md.)

Hepatic S-adenosylmethionine (SAMe) is maintained constant by the action of methionine adenosyltransferase I/III (MATI/III), which converts methionine into SAMe and glycine N-methyltransferase (GNMT), which eliminates excess SAMe to avoid aberrant methylation reactions. During liver regeneration after partial hepatectomy (PH) MATI/III activity is inhibited leading to a decrease in SAMe. This injury-related reduction in SAMe promotes hepatocyte proliferation because SAMe inhibits hepatocyte DNA synthesis.

Author(s): 
Varela-Rey, Marta
Fernández-Ramos, David
Martínez-López, Nuria
Embade, Nieves
Gomez-Santos, Laura
Beraza, Naiara
Vázquez-Chantada, Mercedes
Rodríguez, Juan
Luka, Zigmund
Wagner, Conrad
Lu, Shelly C.
Martínez-Chantar, M. Luz
Mato, José M.
Publication Title: 
The Prostate

BACKGROUND: Signal transducer and activator of transcription (Stat)-3 and nuclear factor-kappa B (NF-κB) are important signaling pathways constitutively activated during inflammation. We previously reported that high-fat diet (HFD) intake induces oxidative stress in the prostate through elevated expression of NADPH oxidase subunits causing NF-κB activation. We sought to determine whether Stat-3 is involved in the activation of NF-κB in the prostate as a result of HFD feeding, leading to inflammation. METHODS: C57BL/6 mice were either fed with regular diet (RD) or HFD for 4 and 8 weeks.

Author(s): 
Shankar, Eswar
Vykhovanets, Eugene V.
Vykhovanets, Olena V.
Maclennan, Gregory T.
Singh, Rajesh
Bhaskaran, Natarajan
Shukla, Sanjeev
Gupta, Sanjay
Publication Title: 
Carcinogenesis

Chronic inflammation is an underlying risk factor for colon cancer. Tumor necrosis factor alpha (TNF-α) plays a critical role in the development of inflammation-induced colon cancer in a mouse model. S-adenosylmethionine (SAMe) and its metabolite methylthioadenosine (MTA) can inhibit lipopolysaccharide-induced TNF-α expression in macrophages. The aim of this work was to examine whether SAMe and MTA are effective in preventing inflammation-induced colon cancer and if so identify signaling pathways affected.

Author(s): 
Li, Tony W. H.
Yang, Heping
Peng, Hui
Xia, Meng
Mato, José M.
Lu, Shelly C.

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