Læknaneminn


Læknaneminn - 01.04.1997, Side 110

Læknaneminn - 01.04.1997, Side 110
Peter Duesberg and David Rasnick Institute of Child Health and Human Development concluded that AIDS prophylaxis with AZT also harms children: “In contrast with anecdotal clinical observations and other studies indicating that zidovu- dine favorably influences weight-growth rates, our analysis suggests the opposite.” 205. 10) Even before the Concorde study a rare publica- tion critical of AZT by the NCI reported in 1990 that AZT increased the annual Iymphoma risk 50-fold compared to untreated controls 19S. But despite the devastating evidence that AZT enhances morbidity and accelerates death by causing AIDS defining diseases on its own, the faith of the medical orthodoxy in FDA approved AZT seems unshakable. No news is bad enough to discourage AZT prescriptions 25,173 (see 7.8.). Nevertheless, recently a few mainstream AIDS doc- tors have openly registered dissent, although not in the form of dedicated articles. Says Jay Levy, professor of medicine at the University of California at San Francisco, “With all the hoopla about antiviral drugs, and you get any virologist aside and they’ll say this is not how we are going to win, it’s high time we look at the immune system” 206. Lecturing his medical stu- dents, another professor of medicine at the University of California at San Francisco, Donald Abrams, is even more direct according to a university magazine: In contrast with many of my colleagues at SFGH [San Francisco General Hospital] in the AIDS pro- gram, I am not necessarily a cheerleader for anti-retro- viral therapy. I have been one of the people who’s ques- tioned, from the beginning, whether or not we’re real- ly making an impact with HIV drugs and, if we are making an impact, if it’s going in the right direction. Despite the promising evidence, definitive proof of protease inhibitors’ efficacy can be provided only by randomized clinical trials with placebo. Because new antiviral drugs are continuously being developed, con- ducting such trials is virtually impossible due to the reluctance of patients to continue treatment with and ”old” drug. Abrams spent the first half of his lecture describing analogous problems during the testing and approval of AZT, the first drug used in AIDS therapy. AZT, a nucleoside analog, belongs to a class of drugs that inhibit DNA polymerization by terminating grow- ing DNA chains. The study which demonstrated that AZT might be of benefit was a placebo control trial begun in 1986 involving 288 patients. Although the study was originally intended to last 24 weeks, it was cut short and unblinded half way through because of statistically significant differences in deaths between the two groups. Abrams lamented that although ”18 more people made it to this arbitrary milestone of four to eight months after pneumocystis... I didn’t feel that this was showing that we were prolonging survival.” Abrams blamed the ”very powerful rhetoric” of the emerging community of AIDS activists, who demanded an end to clinical trials. "Somebody should write a book about the impact of that decision on HIV clinical trials his- tory,” added Abrams ”because everything changed because of that demand.” Abrams recounted his early misgivings about AZT, which loses its effect after a year or two because the virus becomes resistant. He was also disturbed by find- ings demonstrating that a high dose of AZT resulted in a smaller rise of CD4 cells than a lower dose. ”Maybe if we just stop it altogether people will be better off,” he said. Members of the audience were surprised to learn of the paucity of solid, clinical research behind AZT and other nucleic acid chain terminators, which prevent infected T-cells from transcribing the RNA viral genome into DNA, thereby inhibiting viral pathogen- esis. Abrams exposed the tragic farce of past AIDS research and therapy—people who thought they were doing something useful were actually wasting time and valuable resources. How should the clinician apply the new therapies? Abrams described his approach with patients. ”1 have a large population of people who have chosen not to take any antiretrovirals since I’ve been following them since the very beginning... They’ve watched all of their friends go on the antiviral band- wagon and die, so they’ve chose to remain naive [to therapy]. More and more, however, are now succumb- ing to pressure that protease inhibitors are ‘it’... We are in the middle of the honeymoon period, and whether or not this is going to be an enduring marriage is unclear to me at this time, so, I’m advising my patients if they still have time, to wait.” 18°. Some of the most damning admissions to the exis- tence of AZT-specific AIDS diseases come from the suppliers of the drug themselves. The warnings on the LÆKNANEMINN 108 1-tbl. 1997, 50. árg.
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