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Rheumors Volume 10, Number 2: Summer 2000
DC
OFFICE CONTINUES TO GROW
By Margaret Dieckhoner, Administrator
Werner
F. Barth, MD is a much-recognized name in the rheumatologic
community. Dr. Barth joins our group in July and will
practice in our K Street, NW office. We are extremely
proud to welcome him to our practice.
Dr.
Barth, former chairman of the section of Rheumatology
at the Washington Hospital Center, maintains a national
reputation in the field of arthritis and rheumatology.
He has published numerous journal articles, made contributions
to several books, and through his dedication to resident
and medical student education, has succeeded in training
hundreds of physicians, many of whom today are practicing
rheumatologists in the Washington metropolitan area.
Dr.
Barth, a native of New York, did his undergraduate training
at Columbia College and received his doctorate of medicine
from Albert Einstein College of Medicine. His diverse
postgraduate training included rotations at Barnes Hospital
in St. Louis, MO, the National Cancer Institute, NIH and
the University of Washington, Seattle, WA. After completing
his residency, Dr. Barth returned to the Washington, DC
area and spent the next three years as an investigator
in the Arthritis Branch of the National Institute of Arthritis
and Metabolic Diseases. He then went on to the University
of Maryland, Baltimore, where he was appointed Associate
Professor of the Department of Medicine and the Chief
of the Arthritis Division. After four years in Baltimore,
he was recruited by the Washington Hospital Center to
develop and chair the section of Rheumatology, where he
has practiced for 28 years.
Dr.
Barth's career has encompassed many exciting dimensions
of medicine. His writing has been prolific and includes
over 75 journal publications and several textbook chapters.
He has been a consultant at area hospitals including an
appointment as Professor of Medicine at The George Washington
University Hospital and chairman of the Department of
Medical Specialties at the National Rehabilitation Hospital
for over ten years. He has maintained an active role in
many professional organizations and most recently had
the honor of serving as Governor of the DC Chapter of
the American College of Physicians-American Society of
Internal Medicine (ACP-ASIM). He will be receiving the
Laureate Award in November 2000, given by the Chapter
for distinguished accomplishment in the field of medicine.
On
a personal note, Dr. Barth will be celebrating his fortieth
wedding anniversary this year. Judith Barth, a registered
nurse who specializes in anxiety and phobia disorders,
and Werner have three children, Richard, an orthopedic
surgeon in Washington, DC, Todd, an attorney in Houston,
TX, and Jackie, a business woman in Hong Kong. In his
spare time, Dr. Barth enjoys, tennis, golf and is an avid
reader. He is also a proud grandfather of six children,
ages four to eight.
We
welcome Dr. Barth to ARA where he will see patients at
out 2021 K Street office three days a week, beginning
July 3, 2000.
POINTS
ON JOINTS
NEW
NIH CONSENSUS REPORT ON OSTEOPOROSIS RELEASED
By Robert L. Rosenberg, M.D.
The
National Institutes of Health sponsored the second Consensus
Development Conference on Osteoporosis Prevention, Diagnosis,
and Therapy March 27-29, 2000. The draft consensus statement
addresses the following issues: Definition of osteoporosis
and its consequences, risks for various groups, factors
in skeletal health, evaluating and treating osteoporosis
and osteoporotic fractures and directions for future research.
Osteoporosis
occurs in all populations and at all ages. Though more
prevalent in white postmenopausal females, it often goes
unrecognized in other populations such as African American,
Asian and Hispanic women and white men. Ten million Americans
have osteoporosis with another 18 million at risk with
low bone density. Twenty percent of osteoporosis occurs
in men. Someone who does not reach optimal peak bone mass
(PBM) during childhood and adolescence may suffer from
osteoporosis when accelerated bone loss occurs post menopause
and with aging.
Osteoporosis
is a serious disorder with significant physical, psychosocial,
and financial consequences. Hip fractures can be particularly
devastating with 20% of patients dying within one year
of a hip fracture and 66% not returning to their previous
level of independence.
The
risks for osteoporosis include female gender, increased
age, estrogen deficiency, white race, low body weight,
family history of osteoporosis, smoking and history of
prior fracture. Secondary osteoporosis may be seen in
association with multiple other medical problems and medications.
Among men, 30 to 60 percent of osteoporosis is associated
with secondary causes. In perimenopausal women, more than
50% of osteoporosis is associated with secondary problems.
Glucocortocoid (steroid) use is the most common form of
drug-induced osteoporosis. Prednisone in a dose of 5mg
or more for more than two months increases the risk of
bone loss.
Adequate
calcium and Vitamin D intake are crucial to develop optimal
PBM throughout life. Those not achieving recommended dietary
intake should have adequate supplementation of calcium
and Vitamin D. Only 10% of girls and 25% of boys ages
9 to 17 and 50% of older adults meet the current calcium
recommendations. Regular exercise, especially resistance
and impact activities contributes to development of high
peak bone mass and may reduce falls in older individuals.
Exercise late in life (even to age 90) may reduce the
risk of falls by 25%.
Fracture
prevention is the primary goal in the diagnosis and treatment
of patients with osteoporosis. Assessment of bone mass
with DXA (Dual Energy X-ray Absorptiometry) testing, identification
of fracture risk and determination of who should be treated
are the optimal goals for evaluation of patients with
osteoporosis. Other methods of Bone Mineral Density (BMD)
determination such as quantitative ultrasound (QUS) provide
information about fracture risk, but it is uncertain how
to apply these results to diagnosis and therapy of osteoporosis.
Several
treatments have been shown to reduce the risk of osteoporotic
fractures. The bisphosphonates alendronate (Fosomax),
risedronate (Actonel), and etidronate (Didronel) reduce
the incidence of vertebral fractures by 30-50%. Alendronate
and risodronate also reduce the risk of subsequent nonvertebral
fractures. Salmon calcitonin has demonstrated positive
effects at the lumbar spine. Raloxifene is a selective
estrogen receptor modulator (SERM) that has a positive
estrogen-like effect on bone, but avoids the deleterious
effects of estrogen on the breast and uterus.
All
adults with vertebral, hip or wrist fractures should be
evaluated for osteoporosis, but currently, fewer than
5% of patients with osteoporotic fractures are referred
for osteoporosis evaluation and treatment. Painful vertebral
fractures have been recently treated with vertebroplasty
and kyphoplasty, which involve the injection of bone cement
into the fractured vertebra.
The
conference panel recommended that future research address
the following issues: maximizing peak bone mass, the role
of genetic factors, mechanisms of steroid induced osteoporosis,
secondary osteoporosis, gender, age, and ethnically specific
data to determine fracture risk, quality of life issues,
the role of depression and eating disorders, combination
therapy, optimal evaluation and management of fractures,
and education and cost effectiveness of osteoporosis programs.
A
final version of the report will be released after further
revision. The draft version is available on the Internet
at .
Answers
To Your Questions
| Q. |
I
am hearing a great deal about glucosamine and chondroitin
sulfate to treat arthritis. Can you tell me more about
this? |
| A. |
Recently,
The Arthritis Cure and other books, health and nutrition
stores and media ads have been touting the benefits
of these compounds for arthritis. Glucosamine and
chondroitin sulfate are naturally occurring substances
found in normal cartilage. Glucosamine appears to
be the biologically active component since chondroitin
sulfate is merely composed of modified repeating
units of glucosamine. Most interest has been directed
at glucosamine.
Animal
studies have suggested that glucosamine might slow
cartilage breakdown by stimulating the synthesis
of cartilage components and inhibiting the production
of cartilage-damaging chemicals. Since osteoarthritis
is caused by the breakdown of cartilage (which we
are incapable of rebuilding), it is hoped that glucosamine
might retard the progression of osteoarthritic pain
and damage.
Several
uncontrolled trials in humans have suggested improvement
in symptoms and even a reduction in X-ray changes,
but these trials have been small and short term.
The NIH is currently launching a multicenter controlled
double-blind study to definitively assess the efficacy
of both glucosamine and chondroitin sulfate.
While
we await the results, there are several things to
remember. Glucosamine has only been considered for
osteoarthritis and would not be expected to have
any benefit in inflammatory arthritides such as
Rheumatoid Arthritis. Even more important is the
fact that it is considered a dietary supplement
and not a drug. Therefore, its production is not
regulated or overseen by the Food and Drug Administration
and there is no protection from impurity or any
guarantee of potency. As such, you can never be
sure what is in any given pill. Until studies have
proven its efficacy and its production has been
regulated, glucosamine should be approached, at
best, with caution.
John
L. Lawson, M.D.
|
| Q. |
Is
it important for me to have a follow-up evaluation
of my osteoporosis on the same exact Bone Densitometry
machine or may I use other densitometry machines? |
| A. |
It
is best to stay wedded to the initial densitometer
for the following reasons:
1. There are differences in technique and
bone density measurements from one manufacturer
to the other. For instance, the Hologic densitometers,
over time, report greater levels of osteopenia/osteoporosis
than the Lunar models.
2. Having a technician that has performed
the procedure year after year on the same patient
is very important, as is positioning.
3. It is also advisable that the densitometry
studies be performed at facilities that interpret
the densitometry report using all parameters (both
T score and Z score) and evaluate the patient's
reporting numbers with historical data. Some sites
report electronically without knowing the patient's
history. The Osteoporosis Assessment Centers have
performed literally thousands of studies. These
studies are read by physicians who are experts in
osteoporosis and understand bone densitometry.
|
| Q. |
What
is the T score on a Bone Density Test? |
| A. |
T
score compares the patient in question to a cohort
of young-adults aged 20-40. This is the basis for
developing the number that determines whether a
patient is normal, osteopenic or osteoporotic. Less
than 1.0 standard deviation below the mean equals
normal. One standard deviation to 2.5 deviations
below the mean for the young-adult reference population
is considered osteopenic (low bone density). Greater
than 2.5 standard deviations below the mean is considered
osteoporotic which is associated with a high risk
of bone fractures.
|
| Q. |
What
is the Z score on a Bone Density Test? |
| A. |
The
Z score compares the age-matched reference population
(this is most important in the studies of children).
If it is abnormal in an adult, then the possibility
of a secondary cause for osteoporosis should be
investigated. Physicians at Arthritis and Rheumatism
Associates are well versed in the diagnosis and
treatment of secondary causes of osteoporosis.
Norman
S. Koval, M.D.
|
| Q. |
Are
all calcium supplements alike? |
| A. |
Claims
for superiority of calcium supplements appear in
a variety of media ads. Is one truly superior to
another? The answer is no; they're just different.
All are effective in the prevention and treatment
of osteoporosis.
Calcium
supplements are available in a variety of salts.
Calcium carbonate and calcium citrate (Citracal)
being the most common. Calcium phosphate (Posture),
calcium lactate and calcium gluconate are other
options. Most over the counter calcium preparations
are calcium carbonate including brands such as Caltrate,
Oscal, Tums, Viactiv. Calcium carbonate and calcium
phosphate tend to be the least expensive.
Calcium
absorption is incomplete with only about 20%-30%
being absorbed. Taking calcium in doses of 500 mg
or less increases absorption. Calcium citrate is
usually absorbed in higher amounts than calcium
carbonate; that is why a tablet of Citracal (calcium
citrate) has 315 mg while calcium carbonate supplements
come in 500 or 600 mg tablets. The average American
diet consumes 400 to 800 mg of calcium per day.
The National Osteoporosis Foundation recommends
an intake of 800 mg/day for children 1 to 10 years
old, 1200 mg/day for children 11 to 24 years old,
and pregnant and lactating women, 1000 mg/day for
adults, 1500 mg/day for postmenopausal women not
on estrogen replacement or patients over the age
of 65. In addition, increasing Vitamin D intake
may enhance calcium absorption both from dietary
sources and supplements. The recommended daily intake
for adults less than 50 years of age is 200 IU,
for those 51 to 70 years of age, 400 IU, and for
those over the age of 70, 800 IU.
Calcium
supplements are generally well tolerated. However,
gastrointestinal complaints such as constipation,
bloating and excessive gas are reported. Sometimes
switching from one type of calcium to another may
relieve symptoms.
Remember,
people of all ages and sexes need an adequate intake
of calcium. There is little evidence that any calcium
supplement is more effective than any other in preventing
osteoporotic fractures.
Emma
DiIorio, MD
|
Clinical
Trials - Summer of 2000
Herbert S. B. Baraf, M.D.
The
Center for Rheumatology and Bone Research continues to
distinguish itself as a premier facility for clinical
research in Rheumatology and Osteoporosis. The cooperative
atmosphere we have developed between patients and staff,
and the quality of our work makes us a much-desired location
for many pharmaceutical companies to test new treatments.
Companies such as Merck, Pfizer, Roche, and Johnson and
Johnson have come to rely on us as a leading investigative
site in their programs to develop new therapies for arthritis
and bone disease. Eleven members of the Arthritis & Rheumatism
Associates staff work full time in our clinical trials
division. The work is done in our Maryland and D.C. offices,
and all of our doctors participate in these programs.
This
year we have significantly expanded the kinds of conditions
under study. For the first time we have the opportunity
to participate in clinical trials for patients with fibromyalgia,
ankylosing spondylitis and psoriatic arthritis. We have
had our first experience in studying the effectiveness
of a patch applied to the knee for patients with osteoarthritis
and our first new osteoporosis trial in several years
has just begun.
As
many of you know from personal experience or from reading
prior editions of Rheumors, this medical practice has
participated in the research that has led to therapeutic
developments now known as the Biotechnology Revolution.
Many new therapies are under investigation around the
world, and we (our patients and our doctors) have had
a chance to play a significant role. During the past year
and a half several of these treatments have "come to market."
There is still much work to be done. In excess of 100
new potential therapies for arthritis are under various
stages of clinical investigation. Combined, our Maryland
and D.C. offices are currently actively involved in more
than 40 projects!
We
encourage our patients to participate in clinical trials,
if interested. Sometimes it is simply for the experience
and other times in hopes of finding a solution where conventional
therapy has failed. Whatever the reason you might have
to participate, you can be assured that a top-flight group
of dedicated clinical research professionals will guide
you through the process and assist in the evaluations.
There is no cost involved in participating. Investigational
drugs are provided free of charge. Office visits, x-rays,
laboratory testing and other procedures are paid for by
the sponsors of these programs, some of which may be for
a few days, a few weeks, or a few years.
For
patients interested in participating in clinical research
we have a number of actively enrolling and anticipated
new protocols:
RHEUMATOID
ARTHRITIS (RA): We are engaged in the evaluation of
four new Disease Modifying Anti-Rheumatic Drugs (DMARDS)
for patients at various stages of their Rheumatoid Arthritis.
DMARDS in general are slow acting agents that retard the
progression of this disease preventing joint destruction
and deformity. Soon we will begin protocols evaluating
patients with early Rheumatoid Arthritis whose disease
requires initial treatment with Methotrexate. These protocols
will specifically test whether methotrexate alone is as
effective as methotrexate plus a newer, genetically engineered
(anti-TNF) medication. (Maryland & D.C.)
Three
protocols will be for patients with long-standing rheumatoid
arthritis who still experience joint pain and swelling,
in spite of a comprehensive treatment program that includes
methotrexate.
Evaluation
of a new Selective Cox-2 Inhibitor (similar to Vioxx and
Celebrex) is under way at the D.C. office.
OSTEOPOROSIS:
A new trial of a medication to control the progression
of osteoporosis and prevent hip and vertebral fractures
has just started to enroll in the Wheaton office. Free
screening for osteoporosis will be available for post-menopausal
women interested in being evaluated for this study.
OSTEOARTHRITIS
OF THE KNEES OR HIP: We have a number of different
programs that are actively enrolling. Evaluation of new
selective COX-2 inhibitors is ongoing. One study compares
acetaminophen (Arthritis Strength Tylenol) to Vioxx. This
spring we began a program to study the cartilage-stabilizing
effect of a drug currently used to treat osteoporosis.
It is hoped that this treatment will prevent osteoarthritis
from progressing.
A
potent pain long-acting reliever for patients with severe
knee or hip osteoarthritis is being evaluated in both
offices.
An
NSAID (containing skin) patch for osteoarthritis of the
knee is under evaluation in our Maryland offices.
LOW
BACK PAIN: One program in D.C is currently evaluating
medication to control pain due to chronic backache.
FIBROMYALGIA:
We are conducting our first clinical trial evaluating
a treatment for this condition. The program is being conducted
in the D.C. office.
ANKYLOSING
SPONDYLITIS: We feel fortunate to have had both of
our research sites selected to conduct a trial of a new
Selective Cox-2 anti-inflammatory agent as a treatment
for this condition. Fewer than twelve sites in North America
will
PSORIATIC
ARTHRITIS: Enbrel, released 18 months ago for Rheumatoid
Arthritis, is being studied in a national multi-center
trial for Psoriatic Arthritis. This trial will be conducted
in our Wheaton office and requires patients to have at
least one patch of psoriasis and three tender and swollen
joints. participate in this project. (Maryland & D.C.)
In
all of these programs, diagnostic testing, medication,
and physician visits are free of charge. We would be delighted
to review the specifics of these trials with you. Please
feel free to discuss these programs with your physician
on your next visit to the office. If you know someone
who is not a patient of our practice who might be interested
in learning more about our research center, please refer
him or her to our study staff at 301-942-6610 for additional
details concerning both Maryland and D.C. programs.
If
you would like to be included in our clinical trials database,
please fill out the enclosed questionnaire.
Herbert
S. B. Baraf, M.D., FACP, FACR
A quarterly
publication brought to you by Arthritis & Rheumatism Associates
Norman S. Koval, M.D. Herbert S. B. Baraf, M.D. Robert L.
Rosenberg, M.D. Evan L. Siegel, M.D. Margaret Dieckhoner,
Editor © 1990 Arthritis & Rheumatism Associates |