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President
Bushs budget proposal includes deep cuts
for many health care programs for people without
health insurance. While President Bill Clinton championed
these programs, the present administration plans on
phasing out these programs. Many state-based programs
that provide drugs to uninsured people with HIV disease
have placed new restrictions on benefits and enrollment
due to being short on funding. Much of AIDS-related
funding is through discretionary means whereby Congress
must okay yearly. To alert Bush on your comments regarding
HIV/AIDS service and research funding one may call the
White House hot line at 202-456-1111, press 0 and leave
your message.
Another lipodystrophy study conducted in Spain was
published recently in the British medical journal, Lancet.
All 494 patients were antiviral naïve at start
of study and were started on protease inhibitor based
cocktail. 17% of patients developed lipodystrophy at
18 months. Increased risks for lipodystrophy included
female sex, increased age and duration of antiviral
therapy. And while the cause appears to be multi-factorial
problem, it was also observed that d4T (Zerit) was associated
with significant risks for lipoatrophy (loss of fat)
and indinavir (Crixivan) with increased central obesity
(protease paunch). These findings are similar to other
cohort studies.
The race for the development of a second generation
NNRTI (non-nuke) continues, however, not without
drama. While Dupont pharmaceuticals has DPC-083 in phase
II studies, and phase III to begin by early summer,
the company is up for sale, which leaves us with uncertainty
regarding continued development of the drug. One hopes
that the next purchasing company will have the experience
and funding to keep up with Duponts track record,
as it succeeded in developing Sustiva quickly and efficiently.
On another front, the Agouron Pharmaceutical division
of Pfizer has met with some stumbling blocks in trials
with Caprivirine, their novel second generation non-nuke.
Animal studies demonstrated some toxicity and inflammation
to blood vessels (vasculitis). The sponsor is committed
to developing this agent and is working with the FDA
to complete its prior studies as well as further
pharmacokinetic (blood drug levels) investigations.
The next phase of clinical trials are hoped to begin
early next year (2002).
Pegylated interferon combined with ribavirin for
treatment of hepatitis C is more effective than
standard interferon. The new Schering-Plough form of
interferon was approved by the FDA in January with Hoffman
La-Roche also on the way. The PEG interferon named because
of its attached molecule of polyethylene glycol improves
its half life enabling patients to dose the drug
only once per week. The way in which the pegylated versions
approval occurred makes little sense as one can only
obtain ribavirin with the older interferon version;
ribavirin in combination with the PEG form is clearly
superior. Other drug treatments for hepatitis C are
also on their way. They include interleukin 10 as well
as other inhibitors against hepatitis C such as protease
inhibitors.
Drug resistant stains of HIV are increasing among the
newly infected. In a study reported at the 8th Conference
on Retroviruses and Opportunistic Infections held in
Chicago this year, 14 percent of patients newly infected
with HIV were found to have resistance to drugs of one
particular class, increased from previously reported
3.5%. The tends showed that East Coast had increased
resistance compared to the West Coast; the study was
conducted in Dallas, Denver, San Diego, New York, Los
Angeles, Birmingham, Seattle, Montreal and Vancouver.
Two conclusion remains clear: drug resistant patients
are spreading virus through unsafe sex and HIV-infected
individuals need to continue practicing safe sex
barebacking is dangerous and persons promoting
this form of unsafe sex are irresponsible.
More HIV+ individuals are looking at plastic surgery
to help combat the disfiguring consequences of lipodystrophy,
reported at the World Congress on Liposuction Surgery.
Cosmetic surgeons are busy removing buffalo humps and
other fat deposits. Cosmetic surgeons should work in
cooperation with the HIV specialist or HIV antiretroviral
prescribing physician.
Morbidity and mortality rates of aggressive squamous
cell skin cancers appear to high in HIV positive patients.
In a study reported at the American Society for Dermatologic
Surgery and the American College of Mohs Micrographic
Surgery and Cutaneous Oncology. Of the 10 patients who
were doing well with HIV infection developed these aggressive
skin tumors; 7 developed metastases and 5 died at an
average of 11 months. The study suggests that HIV-positive
individuals who develop aggressive squamous cell skin
cancers should be treated with surgery followed by
radiation therapy.
The triple nuke regimen of AZT (retrovir) + 3TC (epivir)
+ Ziagen (abacavir) was found to be as effective
in treatment of antiviral naïve HIV+ subjects as
compared to the protease inhibitor based cocktail of
indinavir (Crixivan) +AZT/3TC - recently published in
the Journal of the American Medical Association (March
7, 2001). In this study 562 patients who had never experienced
HIV antiviral treatment were randomly assigned in a
double blind to the two cocktail regimens. Hypersensitivity
reactions were reported in 7% of patients taking abacavir
consistent with other studies. Interestingly, 2% of
patients not taking abacavir, but on indinavir were
reported by their investigator to have possible abacavir
reactions based on the presence of rash alone.
Previous
Whispers (September/October 2000)
Progenics
Pharmaceuticals Inc's PRO 542 and Trimeris Inc's T-20
when used in combination may be a powerful new treatment
against HIV. Both drugs effect HIV's ability to fuse
with and ultimately stop HIV entry into the cell. Laboratory
testing presented at the XIII International Conference
on AIDS in Durban South Africa, showed an extremely
potent response. While being used together, dosages
were reduced to one-tenth the amount of each drug.
Cut
or un-cut. In a report published by the New England
Journal of Medicine (March 20, 2000) Ugandan and American
investigators presented a study of heterosexual transmission
of HIV among 415 couples. One of the findings included
the fact that among circumcised male partners (50 men),
no HIV seroconversions occurred vs 16.7% among 137 uncircumcised
male partners. The finding that circumcision afforded
protection against HIV infection may be explained by
the foreskin being prone to microulcerations and provide
increased surface area that is susceptible to HIV. This
may also explain why there is a lower risk of female
to male transmission of HIV in the US where most men
are circumcised.
L-Carnitine
therapy demonstrated encouraging findings in
4 patients treated for peripheral neuropathy (not to
be confused with acetyl- carnitine being used for lipodystrophy).
After 6 months of treatment there was observed improved
skin innervation. Although this study findings, (presented
at the 3rd International Workshop on Salvage Therapy
in April 12-14, 2000), are limited by the small number
of patients (20 patients are now continuing in this
study) we hope that larger investigations are done to
provide patients with additional treatment options for
peripheral neuropathy symptoms.
Immunologic
as well as anti-HIV benefit with interleukin 2. reported
in the July 12, 2000 issue of the Journal of the
American Medical Association. The study was conducted
among 82 patients with CD4 T-cell counts ranging from
200-500 cells. Patients on IL-2 showed greater range
of increased CD4 cells and more patients on the IL2
treated group (67% vs 36%) achieved viral loads of fewer
than 50 copies/ml. This is the first study published
to show enhanced control of viral replication with Il-2.
See Dr Sirinek's article in this issue.
Dupont
Pharmaceuticals is ready to launch a phase 2 study of
their new second generation non-nucleoside reverse transcriptase
inhibitor. After
having less than superior effects from an earlier compound
DPC 961, Dupont shifted their efforts to another agent
in their pipline Гђ DPC 083. Dupont Pharmaceuticals is
planning this phase II study at multiple sites in Europe,
but at only 5 sites in the US; NorthStar will be one
of the sites conducting the study.
IML
(International Male Leather) weekend and circuit parties
this summer has realized an increased incidence
of STD's among the gay community in Chicago. Obvious
unsafe sexual practices are becoming more commonplace.
Although anecdotal, we have seen near epidemic proportions
of STD's during this Summer. This has also been reported
to us by other practitioners in Chicago. Besides the
obvious toll on one's health, STD's are associated with
a greater risk of HIV transmission to uninfected partners.
We can not believe the carelessness and lack of responsibility
that is becoming more rampant in the community. This
is a sad commentary of our times.
Antiretroviral
drug holidays is
beoming of increased interest to HIV clinicians and
researchers. Presently we believe this approach may
also have relevance to patients currently overtly failing
their regimens, so to encourage the re-domination of
susceptible wild-type virus among selected patients.
However this approach is also being investigated among
stable patients with undetectable viral loads. But data
to support the approach is small and very preliminary
at best. This tactic may provide more drug free periods
which decrease toxicity, improve adherance and decrease
cost of treatment. It is refreshing to see the old conservative
researchers becoming more creative while also stretching
their necks out, once in a while.
Merck
and Co, Inc has been investigating a novel protease
inhibitor, MK-944
(formerly L-756,423) to be used with Crixivan in a single
capsul. However, a recent Phase II study was suspended
due to unexpected renal (kidney) toxicity with rats.
Although this was not seen previously in a study with
dogs or other pre-clinical studies, the study was suspended
and further development with this agent was placed on
hold. We hope that Merck remain committed to understanding
this problem and perhaps continuing in their previous
efforts to develop further treatment options for HIV
infected patients.
Hydroxyurea's
role in
HIV treatment is still unclear. A recent study published
from researchers from Johns Hopkins reported higher
incidence rates of peripheral neuropathy among patients
on hydroxyurea combined with d4T + ddI as compared with
ddI/d4T alone. These finding add to the other accumulating
toxicity of this drug which also include pancreatitis
and not uncommonly seen Гђ hematologic adverse events.
Delavirdine
(Rescriptor) may have finally found a niche in HIV therapeutics.
Reported in a small study at the XIII International
Conference on AIDS in Durban, South Africa, delavirdine,
a non-nucleoside reverse transcriptase inhibitor appeared
to enhance HIV protease inhibitor blood levels. When
used in combinations with protease inhibitors, combination
treatment with delavirdine appeared to result in reducing
HIV load and increasing CD4 T cell count.
Previous
Whispers (February/March 2000)
Institution
of a new oppressive policy towards PWA's by Statlanders
Pharmacy. A prominent mail-order pharmacy, Statlanders
( or 'Ratlanders' as some PWA's call them) that many
HIV-positive patients utilize, has been recently acquired
by Bergen Brunswig, Inc. They have recently changed
their policy regarding patient burdens and responsibilities.
As a result, some patients will now have to pay up front
for the entire cost of their medications. One patient
on growth hormone was quoted as saying that he may have
to pay out up to two months in advance for his meds,
which can amount to $15,000. Most patients do not have
these financial resources. He was told by this company's
patient liaison to go else-where for his business. Perhaps
other patients should go elsewhere as well. Statlanders
will probably lose much business. Other mail order pharmacies
are not requiring up front payments and would be more
than happy to accommodate former Statlanders clients.
The
latest theory for the cause of fat redistribution or
lipodystrophy ... that
was evoked at recent medical meetings is its' relation
to mitochondrial toxicity. Mitochondria is present in
all human cells and is abundant in adipocytes (fat cells).
Various anti-viral drugs commonly used for the treatment
of HIV disease have been shown in the test tube to cause
mitochondrial dysfunction. Still many HIV clinicians
are uncertain of the link between mitochondrial toxicity
and lipodystrophy.
Viral
load resurgence was observed when triple therapy (HAART)
was stopped. An
attempt to cure AIDS via treatment with HAART with interleukin-2
failed reported in USA TODAY, quoting a recent article
in Nature. After halting treatment, the virus rebounded,
despite the fact that early indicators showed no detectable
levels of virus in the blood, initially. It was hoped
that IL-2 would activate any latent infected cells so
that the activated cells would then be susceptible to
HAART therapy. This approach may need to be redesigned
to affect HIV infected cells in other body compartments
such as brain and testicular tissues.
Low
levels of HIV were found to be replicating in the blood
and genital fluids, despite 'undetectability'by conventional
viral load testing. The 22 patients in this study
had undetectable virus in the blood using a hypersensitive
assay for viral load to the level of less than 50 copies/ml
but subsequently showed detectable HIV-RNA in selected
cell types via more sensitive testing from blood plasma.
The study, recently published in JAMA (782; 17: 1627-32),
showed that 12 of the 22 patients had negative HIV-RNA
levels in genital secretions but that 8 individuals
had lower levels of HIV RNA. Presently and from this
study, it is not clear where the low level of replication
or residual infection is taking place, whether from
lymph nodes, various immune system cells or other sanctuary
sites.
New
transmission of drug resistant HIV strains continue
to appear. In
a recent study (JAMA;282:1142-9) of 141 patients from
San Diego, Los Angeles, Dallas, Denver and Boston, resistance
mutations were seen in newly diagnosed patients prior
to any antiretroviral exposure. One can't help believing
that this situation will only accelerate over the not-too-distant
future. Important to the community, safe sex should
be maintained and stressed to everyone, including those
individuals on antiretroviral therapy.
A
new study shows high risk sexual behavior to be occurring
in adolescent gay and bisexual males. The
Centers for Disease Control and Prevention (CDC) conducted
interviews among gay men in Baltimore, New York, Seattle,
Miami, Los Angeles and San Francisco from 1994 through
1998. Over 40% of males surveyed said they engaged in
unprotected sex within the previous 6 months. The growing
complacency among young gay men may be due to the illusion
that HIV does not necessarily progress to AIDS because
of aggressive antiviral treatments. Many of these individuals
have not lost friends to AIDS like older aged gay men.
Additionally, young men who are just becoming sexually
active may not be routinely testing for HIV. Stronger
educational efforts should be implemented towards younger
aged individuals.
Chinese
herbal therapy was found NOT to show benefit, published
recently in the Journal of AIDS. While
many patients with HIV often pursue alternative therapies
as treatment or as adjunctive therapy, this study is
important and may help patients make a better decision
on whether to add more pills and expense to their regimens.
The study involved investigators from Zurich, Dublin
and San Francisco and the 68 participants were patients
with T-cells below 500 on stable antiviral therapy.
The patients were then randomized to receive either
pills containing 35 Chinese herbs or placebo for 6 months.
The patients taking the herbs had more gastrointestinal
side effects, however, there was no benefit in viral
load, HIV symptoms nor quality of life.
New
estimates for the start of the global AIDS pandemic
has now been estimated back to the 1930's. Researchers
presented their calculations at the Retroviral meeting
in San Francisco on January 30, 2000. The calculations
were based on a large computer database of HIV samples
and genetic sequencing from the samples to calculate
the evolutionary tree.
Dupont
Pharmaceuticals Company has encountered a glitch in
their research of their compound DPC 961. Preliminary
findings showed the new compound to not be as advantageous
nor superior to Sustiva. Thus they have shifted their
efforts at developing yet another NNRTI. Phase II studies
with DPC 083 are being planned; the hope is that this
new compound may have the potential of being better
tolerated and superior for patients failing treatment
with other approved drugs.
A
leading cause of death among priests has been attributed
to AIDS. A
new report coming out of Kansas City, where a prominent
priest has recently died of AIDS has stipulated a large
portion of deaths among the clergy to be secondary to
HIV and AIDS. One leading AIDS caregiver has hypothesized
that Catholic priests may be very closeted about their
sexual preference thus inhibited about screening for
HIV infection or seeking early treatment.
Previous
Whispers (June/July 1999)
HIV
Positive Women Have Higher Risks for Developing AIDS.
Researchers
from John's Hopkins have demonstrated that HIV-positive
women with similar viral loads of males appear to have
half the CD4 T cell counts of their male counterparts.
Women may not be equal in HIV progression due to hormonal,
biologic or anatomical differences. Other researchers
in Switzerland and Italy have reported similar results.
It may be inferred that HIV+ women should be treated
more aggressively and earlier.
Early
Detection of Kaposi's Risk. A new test is being
developed to detect the presence of HHV-8 (herpes virus
type 8) the virus believed to be the cause kaposi's
sarcoma in AIDS. Although the incidence of KS is declined
among patients treated with triple therapy many individuals
that are untreated are still at high risk. The test
may be used in addition to other screening tests for
HIV positive patients that may aid in the decision making
of starting on treatment for HIV.
HIV
Suppression vs. HIV Cure. Researchers and physicians
have been pendulum swinging from two vantage points.
The hope of finding a cure via focused research on the
treatment of latent (inactive) virus populations is
tempered with the struggle of keeping HIV under control.
Obstacles of resistance and trying to help promote adherence
to difficult treatment regimens for some patients is
a frequent daily labor for physicians and patients alike.
Most believe that finding a cure is still a surmountable
task that can be undertaken. While every HIV infected
cell in the body may not be reachable with current antiviral
drug therapy, there may be ways to strengthen the immune
system to overcome HIV.
Less
Than Standard. A
national survey of HIV treatment conducted by the University
of California at San Francisco discovered that one of
every four patients received out-of-date treatment regimens.
The study found that doctors treating less than 100
HIV patients were more likely to prescribe wrong combinations
or delay treatments until patients were often sick.
Managed care insurance companies unfortunately also
promote this problem by attempting to encourage general
doctors to care for HIV-infected individuals.
Liquid Norvir Sufferers. News
regarding a new formulation of Norvir has arrived. The
FDA has finally given Abbott Labs, the manufacturer
of Norvir, the green light to make available the new
form of its' protease inhibitor in gel capsule form
for July 1999. Currently, patients on Norvir must endure
the horrible taste while trying to dilute it with various
foods and shakes, sometimes not suppressing its' gross
after taste.
New
HIV Class of Drug Soon to be Submitted. Gilead
Sciences, the manufacturer of Preveon (adefovir dipivoxil)
has announced plans to submit its' NDA (new drug application)
soon for the marketing of this new antiviral agent .
Preveon is the first antiviral in the nucleotide class
and will be submitted for approval at one 60 mg tablet
per day dosing. (Gilead Sciences' PMPA prodrug is the
second agent in this new class and is also making its
way through clinical trials). Initial trials with Preveon
dosed at 120 mg per day, was found to demonstrate reversible
but significant kidney toxicities. The 60 mg dose is
reported by Gilead to have significantly less kidney
side effects, while still maintaining important antiviral
effect. An additional attribute of the drug is its'
improved antiviral effect in patients who already possess
resistance to 3TC.
New
Protease Inhibitor Now on the Shelves. Amprenavir,
being marketed by Glaxo Welcome under the name Agenerase
(VX-141) is a new protease inhibitor has made it to
pharmacy shelves this month. The new protease inhibitor
is the one that can be taken with or without food, but
at eight large capsules, twice per day. Many physicians
and researchers view with pessimism the claim that Agenerase
may still be effective in 55% of patients with resistance
to other protease inhibitor agents.
Cigarette
Smoking. A
New study has revealed that smoking may be an additional
health risk for HIV infected patients. The study published
in the American Journal of Respiratory and Critical
Care Medicine demonstrated that HIV-positive individuals
who smoke have depressed levels of CD8-lymphocytes in
the bronchial lavage fluid which may play a role in
fighting HIV. Smokers were also shown to have lower
levels of interleukin-1 in the bronchial fluid, important
at fighting bacterial infections. The study may suggest
and explain how HIV-positive smokers are more at risk
for respiratory and lung infections such as bronchitis
and pneumonia.
Remune (Salk Vaccine) Trial Terminated! The
large multicenter study investigating the immune based
vaccine therapy for HIV positive patients has been closed
down. 2500 patients were enrolled. The company sited
the opinions of the Data Safety Monitoring Board who
believed that there was no significant differences in
clinical endpoints between patients on treatment vs.
the control group. Although the company states that
new plans will be made for which to study this treatment
vaccine so that it may eventually come to market, this
remains to be seen. Currently, the findings that it
improves certain immune functions has yet to be established
as being clinically important
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