Navigation Links
HIV Patients May Be at Risk of Heart Problems When Taking Protease Inhibitor Drugs

A widely-used class of drugs that keep the HIV-virus infection from progressing to AIDS may cause serious and potentially lethal heart rhythm disturbances in some patients. The finding of a Mayo Clinic-led investigation appears in the current edition of The Lancet.

In collaboration with colleagues from the HIV Program of Hennepin County Medical Center, Minneapolis; the University of Minnesota, Minneapolis, and University of Wisconsin, Madison, the Mayo Clinic researchers made the discovery about a class of prescription drugs known as "HIV protease inhibitors." Drugs in this class go by the generic names of lopinavir, nelfinavir, indinavir, ritonavir and saquinavir. Brand names include Kaletra, Viracept, Crixivan, Norvir and Fortovase.

The researchers emphasize that the drugs' therapeutic benefits are still greater than the risk of heart problems linked to their use. They urge physicians to apply this new finding by following their patients more closely over the long term, and by looking specifically for heart rhythm irregularities in vulnerable individuals. They encourage physicians to be especially thorough when performing medical exams, and in taking patient histories to be alert for signs of heart rhythm disturbances.

Implications of the Findings

"In no way does it mean patients shouldn't receive protease inhibitors," says Andrew Badley, M.D., associate director of Mayo Clinic's Program in Translational Immunovirology and Biodefense. "It just means clinicians need to be aware of this new risk we've found, and act accordingly. Worldwide, tens of thousands of people are taking protease inhibitors, and the numbers who experience these unexpected side effects are very low -- much less than 1 percent."

Co-investigator Michael Ackerman, M.D., Ph.D. agrees that the benefits of the drugs far outweigh the risks. "Our findings should not jeopardize the availability of protease inhibitors because these drugs are too important for the successful treatment of HIV viral infection and control of AIDS. But hopefully our findings will save lives by alerting the physician to yet another side effect associated with this class of drug."

Dr. Ackerman is director of Mayo Clinic's Long QT Syndrome Clinic and Sudden Death Genomics Laboratory that specializes in various diseases and conditions that make a person vulnerable to sudden death by a ventricular arrhythmia.

There are several specific actions physicians can take to use this new information wisely, Drs. Ackerman and Badley say. The first is to screen by electrocardiogram for heart effects in vulnerable patients. The second is to be alert for multiple drug therapy situations, because certain drug-drug combinations could trigger the adverse heart side effects.

Background of the Discovery

Dr. Badley's research group earlier discovered that protease inhibitors affect "pore function" of "channels" in a specific cell type they were studying. Pore function in channels permits the exchange of biochemical signals within and between cells. After hearing of a case of heart rhythm disturbances in a patient taking protease inhibitors, the researchers looked for evidence of other patients with similar experiences. To do this, they used the U.S. Food and Drug Administration's voluntary drug side-effect database, the Adverse Event Reporting System. They identified 24 cases of heart rhythm disturbances -- all of which were associated with protease inhibitors.

They investigated the hypothesis that the widely-used protease inhibitors may, in fact, be linked to the development of heart rhythm problems through the mechanism of blocking a channel. Ultimately researchers from the University of Wisconsin led by Craig January, M.D., Ph.D., discovered that protease inhibitors do block these key channels.

"Our findings suggest that as a class, protease inhibitors may predispose individuals to QT interval problems or torsade de poi ntes," Dr. Badley says. Dr. Ackerman adds, "Long QT-adverse events are serious side effects in drugs, but with extra caution from physicians, this risk that we've identified can be managed, and that's the good news."


The research team also included Blake Anson, Ph.D., University of Wisconsin; Joel G.R. Weaver, M.D., Mayo Clinic and the University of Ottawa; Omobosola Akinsete, M.D., and Keith Henry, M.D., University of Minnesota and HIV Program of Hennepin County Medical Center, Minneapolis.


Source:Mayo Clinic

Related biology news :

1. Adding Radiation Therapy To Chemotherapy Improves Survival In Patients With High-risk Breast Cancer
2. Emory Eye Center Implants Its First Retinal Chips In Patients With Retinitis Pigmentosa
3. Implanted Devices Detect High-Risk Heart Failure Patients
4. Rush Physicians Using Gene Therapy For Heart Patients With Moderate To Severe Chest Pains Who Do Not Benefit From Other Treatments
5. Gene Signatures Predict Interferon Response For Multiple Sclerosis Patients
6. Bevacizumab Combined With Chemotherapy Improves Progression-Free Survival for Patients With Advanced Breast Cancer
7. Single-donor Islet Transplantation Procedure Shows Promise For Patients With Type 1 Diabetes
8. IMF Launches World’s First DNA Database for Myeloma Patients
9. Patients now surviving once-fatal immune disease
10. Patients and their doctors have different perceptions about HIV and its treatment
11. Patients to benefit from novel technology revolutionizing high-speed molecular imaging
Post Your Comments:

(Date:6/1/2016)... 1, 2016 Favorable Government Initiatives ... and Criminal Identification to Boost Global Biometrics System Market ... TechSci Research report, " Global Biometrics Market By ... and Opportunities, 2011 - 2021", the global biometrics market ... on account of growing security concerns across various end ...
(Date:5/20/2016)... , May 20, 2016  VoiceIt is excited ... with VoicePass. By working together, VoiceIt ...  Because VoiceIt and VoicePass take slightly different approaches ... increases both security and usability. ... about this new partnership. "This marketing ...
(Date:5/12/2016)... 12, 2016 , a brand ... overview results from the Q1 wave of its quarterly ... was consumers, receptivity to a program where they would ... health insurance company. "We were surprised to ... Michael LaColla , CEO of Troubadour Research, "primarily ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... 27, 2016  Global demand for enzymes is ... 2020 to $7.2 billion.  This market includes enzymes ... products, biofuel production, animal feed, and other markets) ... biocatalysts). Food and beverages will remain the largest ... consumption of products containing enzymes in developing regions.  ...
(Date:6/27/2016)... San Diego, CA (PRWEB) , ... June 27, 2016 , ... ... mClinical solutions for clinical trials, announced today the Clinical Reach Virtual Patient ... and their care circle with the physician and clinical trial team. , Using the ...
(Date:6/27/2016)... 27, 2016   Ginkgo Bioworks , a leading ... was today awarded as one of the World ... world,s most innovative companies. Ginkgo Bioworks is engineering ... real world in the nutrition, health and consumer ... with customers including Fortune 500 companies to design ...
(Date:6/24/2016)... Raleigh, NC (PRWEB) , ... June 24, 2016 , ... ... find the most commonly-identified miRNAs in people with peritoneal or pleural mesothelioma. Their findings ... here to read it now. , Diagnostic biomarkers are signposts in the blood, ...
Breaking Biology Technology: