{"id":2155,"date":"2012-02-15T00:00:00","date_gmt":"2012-02-15T08:00:00","guid":{"rendered":"https:\/\/vermont.salk.edu\/news-release\/salk-researchers-find-new-drug-target-for-lung-cancer\/"},"modified":"2012-02-15T00:00:00","modified_gmt":"2012-02-15T08:00:00","slug":"salk-researchers-find-new-drug-target-for-lung-cancer","status":"publish","type":"disclosure","link":"https:\/\/www.salk.edu\/es\/news-release\/salk-researchers-find-new-drug-target-for-lung-cancer\/","title":{"rendered":"Salk researchers find new drug target for lung cancer"},"content":{"rendered":"

LA JOLLA,CA\u2014Drugs targeting an enzyme involved in inflammation might offer a new avenue for treating certain lung cancers, according to a new study by scientists at the Salk Institute for Biological Studies.\n<\/p>\n

\nThe scientists discovered that blocking the activity of the enzyme IKK2, which helps activate the body’s inflammation response, slowed the growth of tumors in mice with lung cancer and increased their lifespan. <\/p>\n

The findings, reported February 12 in Nature Cell Biology<\/em>, suggest that drugs that hinder the ability of the enzyme to command cellular activity might prove effective as lung cancer therapies.<\/p>\n

\"developing<\/p>\n

These images show the development of cancer (dark purple) in the mouse lung, initiated by lentiviral vector.\n <\/p>\n

\nA few cancerous cells (top image) proliferate over time into a full-blown tumor (bottom image). <\/p>\n

Image: courtesy Yifeng Xia, Salk Institute for Biological Studies\n<\/p>\n<\/div>\n

“Lung cancer is one of most lethal cancers and prognosis for patients is often poor, with only about 15 percent surviving more than 5 years,” says Inder Verma<\/a>, Salk’s American Cancer Society Professor of Molecular Biology and lead author of the paper. “We developed a new method of initiating lung cancer in mice, which has properties associated with human lung cancer, and used this model to identify the role of this enzyme in cancer proliferation. We believe that this research could one day lead to therapies that improve the outlook for lung cancer patients.”<\/p>\n

Scientists have long known that there is a link between cancer and inflammation, the body’s first line of defense against infection. Some of the same biochemical players that protect the body by controlling the inflammation response of cells can also be hijacked by genetic mutations involved in the development of cancer.<\/p>\n

\nTo better understand how these normally helpful components of the immune system are put to nefarious tasks in cancer cells, Verma and his colleagues developed a new method of inducing non-small-cell lung cancer in mice. This type accounts for as much as 80 percent of all lung cancer cases.\n<\/p>\n

The researchers used a modified virus to insert genetic mutations into cells lining the mice’s lungs, causing the animals to develop tumors. This laid the groundwork for studies on the molecular causes of this specific cancer type that would be impossible in humans.<\/p>\n

They then turned their attention to a protein complex, NF-KB, that initiates the inflammation response to infection by orchestrating a cell’s genetic activity. Malfunctioning regulation of NF-KB has been linked to various types of cancer, including lung cancer, but due to its many functions in the cell, drugs that directly target NF-KB would likely cause severe side effects.<\/p>\n

\nTo get around this limitation, the Salk researchers focused on IKK2, an enzyme that spurs NF-KB’s activity in response to stress. When they blocked IKK2 activity in the mice with lung cancer, the mice had smaller tumors and lived longer, suggesting that the enzyme is necessary for NF-KB to stimulate tumor growth.\n<\/p>\n

“Now that we understand IKK2 is required for NF-KB to promote tumor growth, we hope to find ways to target its activity with drugs,” says Yifeng Xia, a postdoctoral researcher in Verma’s lab and first author on the paper. “Systemically and chronically blocking IKK2 activity is too toxic to be used in chemotherapy, but we might be able to target another molecule in the signaling pathway by which IKK2 regulates tumor growth.”<\/p>\n

The researchers also showed that Timp-1, a gene involved in regulating cell growth, carries orders from NF-KB to tell lung cancer cells to proliferate. When they suppressed the expression of the gene, the mice with lung cancer had smaller tumors and survived longer.<\/p>\n

\n “The next step is to develop antibodies or other types of drugs that can neutralize Timp-1 to abolish its pro-proliferation role in lung cancer,” says Xia.<\/p>\n

\nThe Salk scientists now hope to develop a mouse model of small cell lung cancer, a more aggressive form of the disease that’s been linked to smoking. They will then test whether the potential drug targets they discovered in this study would be relevant for this more deadly cancer.<\/p>\n

The other authors on the paper were Reuben J. Shaw<\/a>, profesor del Instituto Salk Laboratorio de Biolog\u00eda Molecular y Celular<\/a>; Salk postdoctoral researcher, Narayana Yeddula, and pathologist, Mathias Leblanc; Eugene Ke, of University of California, San Diego; and Yonghui Zhang and Eric Oldfield, of the University of Illinois at Urbana-Champaign.<\/p>\n

The study was funded by the Ellison Medical Foundation, H.N. and Frances C. Berger Foundation, Ipsen\/Biomeasure, Sanofi Aventis, Leducq Foundation, National Institutes of Health, Merieux Foundation, Prostate Cancer Foundation and the U.S. Department of Defense.\n<\/p>\n


\nAcerca del Instituto Salk de Estudios Biol\u00f3gicos:<\/strong><\/p>\n

El Instituto Salk de Estudios Biol\u00f3gicos es una de las instituciones de investigaci\u00f3n b\u00e1sica m\u00e1s destacadas del mundo, donde un cuerpo docente de prestigio internacional investiga cuestiones fundamentales de las ciencias de la vida en un entorno \u00fanico, colaborativo y creativo. Centrados tanto en el descubrimiento como en la formaci\u00f3n de las futuras generaciones de investigadores, los cient\u00edficos del Salk realizan contribuciones revolucionarias a nuestra comprensi\u00f3n del c\u00e1ncer, el envejecimiento, el Alzheimer, la diabetes y las enfermedades infecciosas mediante el estudio de la neurociencia, la gen\u00e9tica, la biolog\u00eda celular y vegetal, y otras disciplinas relacionadas.\n<\/p>\n

\nLos logros del cuerpo docente han sido reconocidos con numerosos galardones, entre los que se incluyen premios Nobel y la pertenencia a la Academia Nacional de Ciencias. Fundado en 1960 por el Dr. Jonas Salk, pionero en la vacuna contra la poliomielitis, el Instituto es una organizaci\u00f3n independiente sin fines de lucro y un hito arquitect\u00f3nico.<\/p>","protected":false},"featured_media":0,"template":"","faculty":[115,45],"disease-research":[46,164],"class_list":["post-2155","disclosure","type-disclosure","status-publish","hentry","faculty-inder-verma","faculty-reuben-shaw","disease-research-cancer-biology","disease-research-lung-cancer"],"acf":[],"yoast_head":"\nSalk researchers find new drug target for lung cancer - Salk Institute for Biological Studies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.salk.edu\/es\/news-release\/salk-researchers-find-new-drug-target-for-lung-cancer\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Salk researchers find new drug target for lung cancer - 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