Medical Forum / Diseases and Disorders / AIDS / December 2004
SCIENTIFIC DATA AGAINST THE USE OF NEVIRAPINE
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PaulKing - 25 Dec 2004 00:12 GMT SCIENTIFIC DATA AGAINST THE USE OF NEVIRAPINE In Pregnant Women, Infants, Children, and Anybody Else
By Roberto Giraldo
Oct. 2001
This primary intention of this paper is to provide technical assistance to the lawyers of the Ministry of Health of the Republic of South Africa in a court trial initiated by a lawsuit brought by the non-governmental organization Treatment Action Campaign against the Government of South Africa "for not providing Nevirapine to every HIV positive pregnant woman and babies born to HIV positive mothers."
The following data support the sensible intention of the Department of Health of South Africa to perform clinical trials at two research sites in all nine Provinces for a period of two years before deciding what is the best course for the prevention of what is known as "mother to child transmission of HIV (MTCT)" in South Africa (Ministry of Health 2001).
The information provided herein should be carefully analyzed, particularly now that the Government of Uganda has decided to make Nevirapine compulsory to all unmarried pregnant woman in that country, irrespective of their "HIV status" (Mohamend 2001).
1. Avoidance of toxic substances during pregnancy and infanthood.
There are numerous scientific findings supporting the internationally accepted practice of avoiding as much as possible any potential toxic exposure of pregnant women, infants, and children (Needlemann & Bellinger 1994; Holmes 1994; Kavlock & Daston 1997a, b; Schardein 2000; Koren 2001).
1.1 Nevirapine is a non-nucleoside reverse transcriptase inhibitor that belongs to the dipyridodiazepinone chemical class of compounds (PDR 2001).
"Nevirapine binds directly to reverse transcriptase and blocks the RNA-dependent and DNA-dependent DNA polymerase activities by causing disruption of the enzyme’s catalytic site" (PDR 2001).
Reverse transcriptase is an enzyme earlier thought to be unique to retroviruses. However, currently it is known than many different human cells have and use reverse transcriptase for very important chemical reactions (Temin et al 1972; Temin 1985). Once in the body systems, Nevirapine can inhibit reverse transcription in normal human cells. This is why Nevirapine is a very toxic substance especially for the growing cells of fetuses and infants.
"Animal studies have shown that nevirapine is widely distributed to nearly all tissues and readily crosses the blood-brain barrier" (PDR 2001). Also, "Nevirapine is widely distributed in humans, readily crosses the placenta and is found in breast milk" (PDR 2001).
1.2. Long-term effects of Nevirapine are unknown.
Clinical trials with Nevirapine to prevent MTCT have been conducted only recently (Guay et al 1999; Marseille et al 1999). It is too early to evaluate the potential long-term side effects of this chemical on the tissues and organs of the mothers and children who received it.
The PDR states "The long term effects of Viramune are unknown at this time" (PDR 2001).
"There are no adequate and well-controlled studies in pregnant women. Viramune should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus" (PDR 2001).
However, it is known that Nevirapine "produces significant decrease in fetal body weight" (PDR 2001), which researchers have found can be "the origin of several adult cardiovascular and metabolic diseases" (McDade et al 2001a,b). "Interest in the fetal and infant origins of many adult chronic, degenerative diseases is currently high, and evidence is mounting for an association between intrauterine growth retardation (IUGR) and adult hypertension, abnormal blood lipid profiles, coronary artery disease, and diabetes" (Barker 1992, 1994, 1998a,b; Leon 1998; McDade et al 2001a,b).
It is disturbing to note that the use of Nevirapine in infants is being recommended when the "evaluation of the pharmacokinetics of nevirapine in neonates is ongoing" and "the safety profile of Viramune in neonates has not been established" (PDR 2001). Additionally, three clinical trials with Nevirapine in pediatric patients reported an overall incidence of related adverse events in 46% of the children (PDR 2001). Insisting on prescribing Nevirapine to babies is akin to "putting the cart before the horse," similar to soldiers commencing firing while awaiting confirmation of their superior’s orders.
On the other hand, it is not even accepted that Nevirapine can prevent the transmission of HIV. This is why the PDR warns: "Patients should be informed that Viramune therapy has not been shown to reduce the risk of transmission of HIV-1 to others through sexual contact or blood contamination" (PDR 2001).
1.3. Nevirapine is a very toxic compound.
Roxane, the pharmaceutical company that produces and commercializes Nevirapine with the commercial name of Viramune, recognized its toxicity in the Physicians’ Desk Reference (PDR 2001), considered the best available source of information on the safety of medications for humans.
They write in capital letters:
"WARNING: SEVERE LIFE-THREATENING SKIN REACTIONS, INCLUDING FATAL CASES, HAVE OCCURRED IN PATIENTS TREATED WITH VIRAMUNE. THESE HAVE INCLUDED CASES OF STEVEN- JOHNSON SYNDROME, TOXIC EPIDERMAL NECROLYSIS, AND HYPERSENSITIVITY REACTIONS CHARACTERIZED BY RASH, CONSTITUTIONAL FINDINGS, AND ORGAN DYSFUNCTION. PATIENTS DEVELOPING SIGNS OR SYMPTOMS OF SEVERE SKIN REACTIONS OR HYPERSENSITIVITY REACTIONS MUST DISCONTINUE VIRAMUNE AS SOON AS POSSIBLE. SEVERE AND LIFE-THREATENING
HEPATOTOXICITY, INCLUDING FATAL HEPATIC NECROSIS, HAS OCCURRED IN PATIENTS TREATED WITH VIRAMUNE. RESISTANT VIRUS EMERGES RAPIDLY AND UNIFORMLY WHEN VIRAMUNE IS ADMINISTERED AS MONOTHERAPY, THEREFORE, VIRAMUNE SHOULD ALWAYS BE ADMINISTERED IN COMBINATION WITH ANTIRETROVIRAL AGENTS" (PDR 2001).
I strongly recommend that any government or institution regulating the use of Nevirapine in pregnant women and children at very least first carefully study the information from the PDR regarding this medication.
1.4. Nevirapine can be toxic for the immune system.
The potential long-term immunotoxic effects of Nevirapine have not been evaluated. However, it is very probable that Nevirapine can be toxic for the growing and dividing cells of the immune system. It could therefore be a risk factor for acquired immune deficiency rather than protecting against AIDS.
Nevirapine is known to be active in "peripheral blood mononuclear cells, monocyte derived macrophages, and lymphoblastoid cell lines" (PDR 2001), which are all cells of the immune system.
Nevirapine causes anemia, trombocytopenia and granulocytopenia, especially in pediatric patients (PDR 2001). It should be remembered that granulocytes also play an important role in the immune system.
Similarly, Nevirapine is known to increment oxidative metabolism in humans (PDR 2001). Interestingly, a growing body of scientific research supports the belief that oxidative stress has a crucial role in the pathogenesis of AIDS (Papadopulos-Eleopulos 1988, 1998/1999; Fuchs et al 1991; Papadopulos-Eleopulos et al 1992; Salvain & Mark 1992; Baruchel & Wainberg 1992; Favier 1994; Giraldo 1997). This is why antioxidants are effectively and widely used in the treatment and prevention of AIDS (Javier et al 1990; Turner 1990; Greenspan 1993; Zhang et al 1997; Giraldo 2000a,b). The increment of oxidative metabolism by Nevirapine is therefore one of the ways Nevirapine can contribute to immunosuppression and AIDS.
Viramune tablets, in addition to Nevirapine, contain cellulose, lactose monohydrate, povidone, sodium starch glycolate, colloidal silicon dioxide, and magnesium stearate. The oral suspension contains carbomer 934P, methylparaben, propylparaben, sorbitol, sucrose, polysorbate 80, sodium hydroxide, and water. (PDR 2001). Several of these compounds are known to be toxic for the cells and chemical reactions of the immune system. For example, silicon, methylparaben and propylparaben are well known to be immunotoxic (Descotes 1988a). This is yet another way in which Nevirapine could cause immunosuppression and AIDS.
Nevirapine "produces significant decrease in fetal body weight" (PDR 2001), and it is scientifically recognized that "prenatal undernutrition has been linked to deficits in several aspects of cell-mediated immunity, to involution of lymphoid tissues such as the thymus, and to suppression of antibody responses to vaccination" and that "These deficits persist for weeks or, in some cases, even years" (Chandra 1975a,b, 1981; Moscatelli et al 1976; Ferguson 1978; Lewis & Wilson 1995; Hasselbach et al 1999; McDade et al 2000. 2001a,b). On the other hand, "murine models have documented impairments in immunity after maternal undernutrition that last through adulthood and into the next generation, despite ad libitum feeding of both F1 and F2 generations" (Chandra 1975c; Beach et al 1982). Therefore, it is probable that in this manner Nevirapine could also cause long-term damage to the immune system and contribute to the development of AIDS.
In this time of AIDS it must be emphasized that there is a growing number of chemicals that are immunotoxic, cause immunosuppression, and that therefore play significant roles in the pathogenesis of AIDS (Descotes 1988a,b; Dean & Luster 1994; Holladay & Luster 1994).
1.5. Nevirapine is known to be toxic for many organs and systems.
"In vivo studies in humans and in vitro studies with human liver microsomes have shown that nevirapine is extensively biotransformed via cytocrome P450 (oxidative) metabolism to several hydroxylated metabolites" (PDR 2001).
It is well known that "Nevirapine is extensively metabolized by the liver and nevirapine metabolites are extensively eliminated by the kidneys. However, the pharmacokinetics of nevirapine has not been evaluated with either hepatic or renal dysfunction" (PDR 2001).
"Severe or life-threatening hepatotoxicity, including fatal fulminant hepatitis (trasaminases elevations, with or without hyperbilirubinemia, prolonged partial thromboplastin time, or eosinophilia), has occurred in patients treated with Viramune" (PDR 2001). This is why "Clinical chemistry tests, which include liver function tests, should be performed prior to initiating Viramune" (PDR 2001).
The CDC of the United States has issued a warning: "The drug, nevirapine, can produce liver damage severe enough to require liver transplants, and has caused death in such use, the Centers for Disease Control and Prevention said in its weekly report" (Altman 2001c).
It has been shown that Nevirapine can impair fertility in rats treated with it, and it produces a significant decrease in fetal body weight (PDR 2001).
Also, there are a growing number of substances with neurotoxic effects on fetuses and children (Rodier et al 1994). Many have toxic effects in the developing bone marrow, heart, lungs, kidneys, liver, endocrine glands, etc. (Lau & Kavlock 1994; Koren 2001), Nevirapine could be one of them.
2. Nevirapine cannot prevent or cure AIDS.
The relationship between in vitro susceptibility of HIV-1 to nevirapine and the inhibition of HIV-1 replication in humans has not been established" (PDR 2001).
"At present, there are no results from controlled clinical trials evaluating the effect of Viramune in combination with other antiretroviral agents on the clinical progression of HIV-1 infection, such as the incidence of opportunistic infections or survival" (PDR 2001). On the other hand, "Resistant virus emerges rapidly and uniformly when Viramune is administered as monotherapy. Therefore, Viramune should always be administered in combination with at least one additional antiretroviral agent" (PDR 2001).
"Patients receiving Viramune or any other antiretroviral therapy may continue to develop opportunistic infections and other complications of HIV infection, and therefore, should remain under close clinical observation by physicians" (PDR 2001).
" Viramune is not a cure for HIV-1 infection; patients may continue to experience illnesses associated with advanced HIV-1 infection, including opportunistic infections" (PDR 2001).
3. Drastic changes in regulations to prescribe antiretroviral medications.
Since the middle of the 1980’s, researchers have developed 15 drugs to combat HIV. "Nevertheless, HIV is so wily that the drugs are still failing thousands of infected people, including many who have taken each of the 15 at one time or another." "New, safer drugs are urgently needed" (Altman 2001b).
During the summer 1996 at the 11th International AIDS Conference in Vancouver, the central orientation upon prevention and treatment of AIDS was "hit HIV early, hit hard." David Ho, the Director of the Aaron Diamond AIDS Research Center of New York University, is still remembered for disseminating that slogan across the globe. It entitled him to be named "Man of the Year" by TIME magazine. This marked the beginning of the simultaneous use of several antiretrovirals, combinations which came to be called "cocktails", also known as "highly active antiretroviral therapy" or HAART (Altman 1996; Gorman 1996).
Only a few years later, at the 13th International AIDS Conference in Durban in 2000, due to the high number and severity of side effects manifested by individuals on these cocktail therapies, many of the side effects being life-threatening, there was a shift in gears: it was ordered that "intermittent therapy" or "therapy with holidays" be instituted (Easterbrook et al 2000; Havlir et al 2000).
However, the toxicity of antiretrovirals continued, with incrementing numbers and severity. On February 6, 2001, the Eighth Annual Retrovirus Meeting in Chicago, together with the USA Department of Health and Human Services, again shifted gears: Do not initiate any antiretroviral treatment in HIV positive individuals until the appearance of symptoms of AIDS. "The new approach calls for waiting until the immune system shows serious signs of weakening" (Altman 2001a).
"Concern has grown over nerve damage, weakened bones, unusual accumulation
of fat in the neck and abdomen, diabetes and a number of other serious sides effects of therapy." "Many people have developed dangerous high levels of cholesterol and other lipids in the blood" (Altman 2001a).
"Among the most troubling side effects seen in people taking the HAART cocktails are death of hip bone tissue, increase in blood cholesterol levels, neuropathy or loss of nerve sensations, kidney failure, radical alterations of liver metabolism, diabetes, skin rashes, pancreas failure, severe anemia, liver dysfunctions so acute as to require transplants and near-instantaneous death due to buildup of lactic acid" (Garrett 2001).
"The fundamental issue in the field right now is the toxicity of our drugs," explained Dr. Diane Havlir of the University of California in San Francisco, speaking in Chicago (Altman 2001b).
"Altering a long-held policy, federal health officials are now recommending that treatment for the AIDS virus be delayed as long as possible for people without symptoms because of increased concerns over toxic effects of the therapies" (Altman 2001a).
Pharmaceutical companies like Glaxo-Smith-Kline are very disappointed with the new directions (Lews 2001).
Beginning in early January officials started announcing the changed course: "The shift, NIH scientists will explain at the annual Conference on Human Retroviruses in Chicago, is prompted by an emerging consensus on three factors. First, the cocktails-called highly active anti-retroviral therapy, or HAART-can’t wipe out all viruses in a person’s body, so patients must take these drugs every day, probably for the rest of their lives. That prompts the second and third factors: toxicity and resistance. The longer people take HAART cocktails, the greater the number of side effects they experience" (Garrett 2001).
In December 2000, in a speech to the Royal Society of Medicine in London, prominent AIDS physician Charles Carpenter of Brown University, a member of the AIDS advisory committee to the NIH, signaled plans to change the treatment guidelines. "In retrospect," he said, "we now realize the risk of drug toxicity is greatly enhanced by taking these drugs early" (Garret 2001). Antony Fauci, Director of the United States National Institute of Allergy and Infectious Diseases, commented: "We are starting to see a greater and greater realization of accumulation of toxic side effects." (Garrett 2001).
The new guidelines can be viewed at www.hivatis.org (Altman 2001a).
Regarding the new shift in gears at the Chicago meeting, it was said: "Experts did not predict most toxicities of the available drugs, and they poorly understand why they develop" (Altman 2001b). However, this is not true; for almost a decade now, scientist Peter Duesberg, from the Department of Molecular Biology at the University of California in Berkeley, has been warning about the toxicity of all antirretroviral medications, as well as the certainty that those medications cause the very AIDS that they are supposed to prevent or cure (Duesberg 1992a,b, 1996; Duesberg & Rasnick 1997, 1998). Many have died because they, their physicians, and the official institutions, did not heed this warning.
Researchers meeting in Chicago were shaken by the fact that: "Some infected people are known as long-term nonprogressors because they have controlled HIV without therapy for as long as 20 years" (Altman 2001b).
Since pharmaceutical companies continued advertising the "great benefits" of antiretrovirals, on April 27, 2001, the Food and Drug Administration (FDA) of the Federal Government of the United States ordered pharmaceutical companies to stop printing lies about the benefits of their antiretroviral products.
4. Alternative non-toxic measures to prevent MTCT.
The Department of Health of the Republic of South Africa is aware of alternative non-toxic means to avoid what is known as "MTCT of HIV", means which will be tested and compared to Nevirapine during the projected protocol (Ministry of Health 2001).
Scientific studies support the contention that the use of vitamins by themselves could be enough to avoid what is known as mother to child transmission of HIV (Stiehm 1995; Landers 1995; Fawzi & Hunter 1998). If this is the case, as many clinical trials and scientific papers contend, it would constitute a very inexpensive and non-toxic practice for South Africa and other countries.
Regarding vitamins in HIV disease progression and vertical transmission, researchers from the Harvard School of Public Health state: "The higher rates of HIV progression and vertical transmission in developing countries coincide with similarly higher rates of malnutrition and vitamin deficiencies, indicating that HIV infection, may be modified by nutritional status." "Numerous observational studies report inverse association between vitamin status, measured bio-chemically or as levels of dietary intake, and the risk of disease progression or vertical transmission." "Adequate vitamin status may also reduce vertical transmission through the intra-partum and breastfeeding routes by reducing HIV viral load in lower genital secretions and breast milk" and "Vitamin supplements may be one of the few potential treatments that are inexpensive enough to be made available to HIV-infected persons in developing countries" (Fawzi & Hunter 1998).
"A growing body of data suggests that low serum levels of vitamin A among HIV-infected pregnant women is associated with higher risk of vertical transmission of HIV" (Fawzi & Hunter 1998).
"Mean vitamin A concentration in 74 mothers who transmitted HIV to their infants was lower than that in 264 mothers who did not transmit HIV to their infants" (Semba et al 1994a).
"In Malawi, higher serum retinol of HIV-infected pregnant women was associated with a reduced risk of vertical transmission" (Semba et al 1994a; Fawzi & Hunter 1998).
" Women who had increasing serum retinol levels over time, however were at a lower risk, whereas women who had declining serum retinol were at a higher risk of transmitting the virus" (Landesman 1996; Fawzi & Hunter 1998).
"Vitamin A supplementation to a population of HIV-infected pregnant women, many of whom had low vitamin A levels, was associated with a decreased number of preterm births and with reduced mother-to-child transmission of HIV in preterm babies, but was not associated with a reduction in HIV transmission overall. Vitamin A decreased HIV transmission in the preterm babies by 47%" (Coutsoudis et al 1999).
"Detection of vaginal HIV-1 DNA was associated with abnormal vaginal discharge, lower absolute CD4 cell count, and severe vitamin A deficiency" (John et al 1997).
"Women with CD4 cell depletion, especially those with vitamin A deficiency, may be at increased risk of transmitting HIV-1 to their infants through breast milk" (Nduati et al 1995).
"Increased risk of maternal-infant transmission was associated with severe vitamin A deficiency among non-breastfeeding women" in the United States (Greenberg et al 1997).
Something to keep in mind is that vitamin A could be teratogenic and WHO recommends that pregnant women should not take more than 10,000 IU of Vitamin A per day (Shah et al 1987; Fawzi & Hunter 1998).
5. Optimal nutritional status to treat and prevent AIDS.
The Government of South Africa is doing its best to treat and prevent AIDS using all the tools provided by the scientific community. In this regard, besides looking at antiretroviral medications, the Department of Health is implementing different measures to guarantee, as much as possible, a good nutritional status to people at risk for AIDS, and to all South Africans at large, as an effective means of dealing with AIDS.
Since the beginning of the AIDS epidemic well recognized researchers in the field of nutrition and immunology, such as Dr. Ranjit Kumar Chandra, noticed that: "There is an uncanny similarity between the immunological findings in nutritional deficiencies and those seen in acquired immunodeficiency syndrome, AIDS" (Jain & Chandra 1984).
"There is a similarity between the immune deficiency, multiple infections, and severe weigh loss seen in AIDS patients, and the association of protein calorie malnutrition (PCM) with reduced resistance to infection observed in malnourished children, particularly in the Third World." "It is also possible that nutritional deficiency may play a significant role in the clinical course of the immunodeficient state." "These similarities between AIDS and PCM suggest that nutrition may contribute to the immunodeficient state. The immunodeficiency in children with PCM can be reversed by nutritional rehabilitation, which suggest that restoration of nutritional state may be a useful adjunct to therapy for AIDS patients" (Gray 1983).
The immunological alterations found in protein energy malnutrition (PEM) are practically identical to those of AIDS: impaired delayed cutaneous hypersensitivity, lymphocyte proliferation response to mitogens, complement activity and secondary response to antigens. There is also a reduced number of rosetting T lymphocytes, increased deoxynucleotidyl transferase activity, decreased serum thymic factor, fewer helper T cells, impaired production of interferon gamma and interleukins 1 and 2, reduced antibody affinity, impaired secretory immunoglobulin A (IgA) antibody response and phagocyte dysfunction. The proportion of helper/inducer T lymphocytes recognized by the presence of CD4 positive antigen on the cell surface is markedly decreased. The ratio Cd4/CD8 is significantly decreased. Lymphoid atrophy is a prominent feature of nutritional deprivation. Serum antibody responses are generally intact in PEM. Most complement components are decreased, especially C3, C5, factor B and total haemolytic activity (Chandra1993).
On the other hand, "Nutritional problems have been a part of the clinical aspects of AIDS from its earliest recognition as a new disease" (Keusch & Thea 1993). "In fact, in many AIDS patients, death seams to be determined more by the individual’s nutritional status than by any particular opportunistic infection. This is, when wasting of lean body mass approaches 55% of normal for age, sex, and height, death is imminent regardless of the forces resulting is such profound malnutrition" (Keusch & Thea 1993).
As explained above, it is scientifically known that "prenatal undernutrition have been linked to deficits in several aspects of cell-mediated immunity, to involution of lymphoid tissues such as the thymus, and to suppression of antibody responses to vaccination." These deficits persist for weeks or, in some cases, even years (Chandra 1975a,b, 1981; Moscatelli et al 1976; Ferguson 1978; Lewis & Wilson 1995; Hasselbach et al 1999; McDade et al 2000, 2001a,b).
Similarly, there is a growing scientific data showing that many chronic diseases of adulthood have their origin at " in utero programming" (Barker 1998a,b). This includes illnesses such as coronary heart disease and stroke, hypertension, type II diabetes and other endocrine alterations (Naeye et al 1971; Barker 1992, 1994, 1998a,b), as well as several immunological disturbances (Chjandra 1975a,b; Ferguson 1978; Beach et al 1982; McDade 2000, 2001a,b). Therefore, it appears that whatever happens during embryonic and fetal times will be remembered by cells, tissues, organs, and systems throughout a lifetime.
"Research in Gambia associated season of birth with infectious disease mortality after the age of 15 years, suggesting an association between prenatal undernutrition, immune function, and adult vulnerability to infectious disease" (More et al 1997, 1999). Prenatal undernutrition has been found to impair antibody responses to vaccination with Salmonella thyfi that last at least up to adolescent times (McDade et al 2001a). The findings of these researchers "suggest a role for fetal and early infant experience in programming the immune system" which may accompany the individual during its entire life (McDade et al 2001a,b).
In addition, "murine models have documented impairments in immunity after maternal undernutrition that last through adulthood and into the next generation, despite ad libitum feeding of both F1 and F2 generations" (Chandra 1975c). Also in mice, deprivation of zinc during pregnancy causes immunodeficiency that can last at least for three generations (Beach et al 1982).
It is therefore very probable that in Africa the consequences of poverty and malnutrition are being transmitted from generation to generation with a cumulative effect and that AIDS in Africa may be the topmost consequence of these cumulative effects of poverty.
In this light, the crucial role of maternal undernutrition in the pathogenesis of pediatric AIDS has seriously been considered to be the case in developing countries (Giraldo 1997). This reasoning also concludes that malnutrition constitutes the main risk factor for AIDS in adults in developing countries (Giraldo 1997). Scientifically speaking, there is no rational for indicting sexual promiscuity as the cause of AIDS in Africa, while underestimating the role of poverty and malnutrition.
"It is not surprising, therefore, that dietary therapy for AIDS has been proposed, debated, and more importantly surreptitiously or overtly used from the early days of the epidemic" (Keusch & Thea 1993).
Twenty years later, researchers insist: "Because nutrient deficiencies may play an important role in the pathogenesis of HIV disease, medical nutrition therapy and counseling are critical aspects of treatment" (Mahan & Escott -Stump 2000). Nutritional therapy is then a must in AIDS (Gerrior & Wanke 2001).
5.1. Good nutrition as a mean to prevent AIDS.
An optimal nutritional status as well as adequate vitamin levels is known to be by themselves enough to prevent AIDS in people who react positively on the tests for HIV. Let us examine some scientific facts:
"All persons with HIV infection should be screened for nutritional problems and concerns at the time of their first contact with a health care professional, and routine monitoring should be performed on an ongoing basis" (Mahan & Escott -Stump 2000).
"The risk of death among HIV-infected subjects with adequate serum vitamin A levels was 78% less, when compared with Vitamin A-deficient subjects" (Semba et al 1994a,b; Fawzi & Hunter 1998).
"In a study carried out among HIV-positive homosexual men, development of Vitamin A deficiency over an 18-month period was associated with a decline in CD4 cell count, widely used as a marker of HIV immune impairment. Normalization of vitamin A was associated with higher CD4 cell counts" (Baum et al 1995; Fawzi & Hunter 1998).
"Lower serum levels of vitamin A were associated with a faster rate of progression among men who participated in the Multicenter AIDS Cohort Study (MACS)" (Tang et al 1997; Fawzi & Hunter 1998).
"Among well nourished HIV- seropositive men who participated in the San Francisco Men’s Health Study, high energy-adjusted vitamin A intake at baseline was associated with higher CD4 cell count at baseline, as well as with lower risk of developing AIDS during the 6 years period follow up" (Abrams et al 1993; Fawzi & Hunter 1998).
"In a placebo-controlled trial in South Africa among children born to HIV-positive women, Vitamin A supplements resulted in approximately 50% reduction in diarrheal morbidity among HIV-infected children" (Coutsoudis et al 1995; Fawzi & Hunter 1998).
In Tanzania: "Multivitamin supplementation is a low-cost way of substantially decreasing adverse pregnancy outcomes and increasing T-cell counts in HIV-1 infected women" (Fawzi et al 1998).
Gary Stein - 25 Dec 2004 17:15 GMT Nevirapine Misinformation: Will It Kill?
by John S. James
December 23, 2004: For a few days last week an Associated Press
"exclusive" story touched off a firestorm of media by charging that
side effects of single-dose nevirapine (to prevent mothers with HIV
from infecting their babies during childbirth) had been covered up.
Later the AP quoted responses -- one comparing nevirapine's
distribution in Africa to the notorious Tuskegee Experiment, another
charging that Africans were treated like guinea pigs. In fact there
never was any evidence of a significant risk of side effects from only
a single dose of nevirapine. There is a risk of HIV drug resistance
from using even a single dose of the drug alone, but this is well known
to all AIDS doctors and experts and has never been covered up.
Every day about 1,800 babies are born with HIV, mostly to women who
have no treatment options either for themselves or to prevent the
infection of their child. There is no reason to doubt that single-dose
nevirapine works, and could prevent about half of these infections.
The brief media storm that still threatens the lives of thousands of
unborn children grew out of a bitter dispute between two officials of
the U.S. National Institutes of Health -- one of whom selectively
released "thousands" of documents (according to news reports) to
reporters and/or members of Congress. The danger now is that misleading
stories published around the world will cause patients, doctors, or
even some governments to reject single-dose nevirapine to prevent
mother-to-child HIV transmission, even when no other treatment choice
is possible.
Background
Nevirapine was approved in the U.S. in June 1996, for use in
combination with other antiretrovirals for treating HIV. For this use
it is taken twice a day for as long as the virus is under control.
Later, a study in Uganda from 1997 to 1999 (the HIVNET 012 clinical
trial) found that a single dose of nevirapine given to the mother and a
single dose to the infant reduced HIV transmission to about half of
what it was with a very short course of AZT. This study, conducted as a
collaboration between researchers from Johns Hopkins University and
Uganda and funded by the U.S. National Institutes of Health (NIH), was
published in September 1999. It showed that HIV transmission at
childbirth could be greatly reduced by a very inexpensive and easy
regimen, even when the mother had little or no prenatal care. It is
rightly considered one of the great successes in HIV prevention.
Nevirapine alone is not the best regimen, however. Later it was learned
from the same study that even the single dose sometimes selects for
resistance mutations in the mother's HIV -- a serious problem because
it could make her treatment more difficult in the future. This can be
prevented by treating the mother's HIV if she needs antiretroviral
treatment, which of course should be done anyway -- or by using a much
more difficult regimen of AZT to prevent transmission -- or by adding
other drugs (usually AZT plus 3TC) to suppress the virus while the
nevirapine is slowly eliminated from the body. But still today the
great majority of women with HIV do not have access to any
antiretroviral treatment. Single-dose nevirapine is inexpensive and
easy to deliver -- and many women will not use a longer course of
medication, because they are afraid of the consequences if people
around them learn or suspect that they have HIV.
The recent controversy developed because after the Uganda study had
been published, an NIH audit found that data on possible side effects
had not been reported correctly by the Ugandan staff. This problem in
one trial did not change the known safety of single-dose nevirapine --
which has been tested in many other clinical trials and widely used to
prevent maternal transmission, without side effects. In continuous,
long-term use in HIV treatment, serious or fatal side effects can
occur, as with any antiretroviral. But these are rare, and they can be
prevented with proper medical care, and they do not happen with one
dose. Aside from the HIV resistance problem, there is no evidence of
any significant safety risk from a single dose of nevirapine.
The current dispute arose after NIAID/NIH hired a physician with
clinical-trials monitoring experience, Jonathan M. Fishbein, M.D., in
July, 2003, to help it correct the kinds of deficiencies that had been
found in the study conducted several years earlier in Uganda. The key
issue seems to be whether the reporting problems found in that study
should invalidate the conclusion that single-dose nevirapine is safe
and effective for preventing maternal-infant transmission. Recently Dr.
Fishbein, still a Federal employee, claimed whistleblower status and
used his Web site, http://www.honestdoctor.org, to release selected
documents about problems with the nevirapine study.
Comment
We looked through all the documents on Honestdoctor.org as of December
22, 2004, and found nothing there that raised any new doubt on
single-dose nevirapine -- now established by much more than the one
trial in Uganda. Instead, the documents on that site show the extensive
work that NIH and others were doing, both before and after Dr. Fishbein
was hired, to correct universally acknowledged technical reporting
problems. The goal was and is to re-analyze the Uganda trial in the
light of all available information, both to re-check the conclusions,
and also to improve clinical research in the future, particularly in
developing countries, which often have a steep learning curve in
applying standards created for pharmaceutical-company research in the
West. I have no idea why Dr. Fishbein alleged "widespread scientific
and professional misconduct at the NIH Division of AIDS (DAIDS)" (quote
from Honestdoctor.org).
There is no reason to doubt that single-dose nevirapine works and
reduces HIV transmission to about half of what it would be without
treatment. (It may do better than that, since the comparison group was
not a placebo but a very short course of AZT, which may have had fewer
HIV transmissions than a placebo would have.) The NIH Division of AIDS,
like almost all other experts, wants to focus on public-health efforts
to make preventive and other treatment available, and not derail these
efforts because of technical problems in a trial that ended five years
ago. This is not "scientific and professional misconduct."
AIDS organizations did well last week in answering the misinformation
about nevirapine. But the damage had already been done. The story went
out on December 13, and was totally unexpected because it was tied to
no medical or scientific development; it went around the world
immediately and no answer could catch up. It is possible that children
have already been born with HIV as a result, and that many more will be
infected unnecessarily.
What Can We Learn for the Future?
This is not the last time the AIDS world will face mass-media storms
that carry serious misinformation throughout the world. What can we do
about it?
AIDS needs a major organization dedicated to consensus development, and
able to offer reporters a single entry point to learn what credible
consensus exists on almost any AIDS issue. No position will speak for
everybody, but the process should be open to hearing and understanding
all dissenting views. Two or more incompatible consensus clusters could
emerge, and they would have to be represented by different
organizations. But reporters could immediately find broadly credible
consensus statements, and talk with experts who have worked on an issue
for years. They may still publish misinformation, but at least an
answer could go out with it -- or be clearly missing from their story.
Years ago AIDS had well-known broad policy organizations, like the AIDS
Action Council in Washington DC. But they represented insiders with
their own interests more than a national or world community. For
example, treatment, research, and international issues were mostly
locked out for years -- and usually the only way to have a voice was to
be part of the scene in Washington. Still these organizations served an
important purpose in providing a common policy base for reporters and
others, and we miss that today.
But now we need a new kind of organization that prides itself on
listening and learning from different people (almost like social
scientists exploring what is out there instead of imposing their own
view) -- but then finds and suggests practical, creative ways these
views and movements can work together in a larger whole.
__________________________________________
Communication Note
Ten days into this controversy Dr. Fishbein has a better Web site than
most AIDS organizations do after many years -- immediately raising the
communication standard. AIDS will face new media storms in the future,
and must get its house in order.
Honestdoctor.org is very well organized, allowing readers to see
immediately what is available and navigate to what they want. The site
has a extensive collection of the recent press articles, consistently
and attractively laid out. Under "Definitions" it has a list of
acronyms and a list of people with their titles -- and will have a
glossary and organizational diagrams. When documents are photographed
and displayed as images, they are processed correctly, so that they are
entirely readable and yet download rapidly on any Internet connection.
And last but not least this site has clearly legible type on its main
pages, when most sites have text that is too small, too light, or
without enough contrast between text and background.
In the future, AIDS organizations should ask for volunteer or
professional Web help that can do at least as well. Remember that our
visitors have millions of other pages a few clicks away, and if a site
is hard to read or hard to use, many will leave.
____________________________________________
For More Information
Here are sources for more information on the recent nevirapine
controversy. Except for the last one, they are December 2004 statements
or articles in chronological order.
* December 14, 2004, "Elizabeth Glaser Pediatric AIDS Foundation on
issue of prevention of mother-to-child transmission of HIV/AIDS and
single-dose nevirapine,"
http://www.pedaids.org/press_release_nevirapine_december_14_2004.htm
* December 15, "Project Inform statement regarding the use of
single-dose nevirapine to prevent mother-to-child transmission of HIV,"
http://www.projectinform.org/news/04_12nvppr.html
* December 15, Treatment Action Campaign, South Africa, "Single-dose
nevirapine is safe and effective: But public health facilities must
switch to more effective regimens wherever possible."
http://www.tac.org.za/newsletter/2004/ns15_12_2004a.html
* December 17, the U.S. National Institute of Allergy and Infectious
Diseases, "Questions and answers: The HIVNET 012 study and the safety
and effectiveness of nevirapine in preventing mother-to-infant
transmission of HIV,"
http://www2.niaid.nih.gov/newsroom/Releases/HIVNET012QA.htm
* December 21 The New York Times, "Furor in Africa Over Drug for Women
with HIV,"
http://www.nytimes.com/2004/12/21/international/africa/21aids.html
* December 22, Nature, "Activists and Researchers Rally Behind AIDS
Drug for Mothers,"Nature.December 23, 2004; volume 432, page 935.
* December 25, Science, "Allegations Raise Fears of Backlash Against
AIDS Prevention Strategy,"Science. December 25, 2004; volume 306, pages
2168-2169.
* You can find more background on nevirapine for prevention of mother
to child transmission at
http://womenchildrenhiv.org/
--
John S James
AIDS Treatment News
www.aidsnews.org
> SCIENTIFIC DATA AGAINST THE USE OF NEVIRAPINE > In Pregnant Women, Infants, Children, and Anybody Else [quoted text clipped - 761 lines] > women" (Fawzi et > al 1998).
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