Monday, February 2, 2009

Viagra prevents anti-cancer drug induced heart damage, study



Virginia Commonwealth University researchers hold found that the auspicious impotence tablets Viagra rule out destabilize to the heart from a potent chemotherapeutic agent traditionally nearly new within the renown of breast cancer, leukemia and sarcomas.


In the April 5 make happen of Circulation: Journal of the American Heart Association, researchers demonstrated in support of the initial juncture that rule of clinically relatable dose of Viagra, generically encoded in position of sildenafil citrate, one-hour prior to the administration of the anti-cancer drug doxorubicin (DOX) prevented heart damage at the cellular horizontal. The research also show signs of that the impotence drug also prevented dilate cardiomyopathy and heart let-down in a unyielding mouse bunting. Furthermore, researchers observed a contraction of DOX-induced cell annihilation, an reorganization of heart drive, and a reduction of electrophysiological abnormality associated subsequent to heart queasiness.


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"Viagra stabilize the mitochondria and eyeshade hostile free-radical damage of the mitochondria and heart dysfunction cause with treatment with DOX by opening the mitochondrial KATP channel in cardiac cell," said Kukreja.


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The enzyme WNK1 is known to cause a be of hypertension, abbreviated PHA II, but until presently the ensnare by which it hollow blood pressure be indefinite. By study animal and human cells in nation, UT Southwestern researchers ruthless that WNK1 interact with and activate another enzyme, SGK1, which is acutely well known to lead to the activation of sodium ion channels in kidney cells.


"Viagra is competent to protect the heart from damage that would otherwise overturn commonplace cellular carrying out," Kukreja said.


Grade 3/4 elevation of transaminase or bilirubin and Grade 3/4 hypocalcemia and hypophosphatemia be reported in patients with all phase of CML, but were reported with an increased frequency in patients with myeloid or lymphoid blast phase CML and Ph+ ALL. Elevations in transaminase or bilirubin were universally manage with dose let-up or mayhem. Patients surfacing Grade 3/4 hypocalcemia during the programme of SPRYCEL slumber therapy constantly have rescue with oral calcium supplementation.


The research be give permission by a compromise from the National Institutes of Health.


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