August 18, 2003 Myeloma Minute

What's News


Question of the Week:

Q. Is Zometa safe for myeloma patients? Should I switch to Aredia? There has been an article circulating on the myeloma list serve about a number of myeloma patients who had kidney failure as a result of taking Zometa.

A. Aredia (pamidronate) and Zometa (zoledronate or zoledronic acid) are the two drugs currently approved by the Food and Drug Administration for use in preventing bone disease in multiple myeloma. They belong to a class of drugs called "bisphosphonates." Aredia was approved in 1996 and became the standard of care for myeloma patients. It has become established as a very safe, helpful drug for the treatment of myeloma bone disease. Zometa was approved in early 2002 based upon study results comparing it with Aredia. Zometa produces more rapid and prolonged reduction in elevated blood calcium when elevated levels are present. However, results evaluating the effects on skeletal related events ("SREs"--tumors and holes in the bone) showed that Zometa and Aredia affect SRE's equivalently. The major difference with Zometa, therefore, proved to be its much shorter infusion time of 15 minutes versus 2 to 4 hours for Aredia.

The most common side effects of either drug are fever, vein irritation at the site of the infusion, general aches and pains, and kidney dysfunction. Fever associated with bisphosphonates is typically mild (i.e. 100 degrees to 101 degrees), occurring a few hours after intravenous infusion and lasting for a few hours at most. Fever is usually easily treated or prevented with 1 or 2 Tylenol (325 mg per tablet).

The main additional concern relates to kidney side effects. All bisphosphonates are potential toxins for the kidneys. Since myeloma can have an impact on kidney function (due to myeloma protein damage or elevated blood calcium), the possibility of kidney-related side effects is of particular concern. Aredia has been used widely for almost 10 years, including the initial trials period. The main toxicity that has emerged is a type of protein loss in the urine (albuminuria or nephrotic syndrome). This toxicity has occurred predominantly with uses of higher than recommended doses (e.g. 180 mg versus 90 mg) and/or more frequent than recommended dosing schedules (e.g. every two weeks instead of once a month). This side effect is usually reversible with dose and/or schedule adjustments or, in occasional severe cases, discontinuing Aredia. Very rare irreversible damage has occurred. Periodic monitoring (e.g. every 3 to 6 months) of urine protein levels with 24-hour urine collection is recommended to prevent any significant kidney damage from Aredia.

Zometa, on the other hand, has only been in clinical use for 18 months. The major toxicity-related concern that has emerged with Zometa is an increase in serum creatinine, which is an indication of kidney dysfunction. Reports of both increased creatinine and occasionally more severe kidney damage, acute tubular necrosis, within the first year have raised concerns that this much more potent bisphosphonate must be used more cautiously with respect to kidney function.

The article which is being referred to on the list serve was published in Kidney Int. 2003 Jul; 64(1): 281-289, entitled "Toxic acute tubular necrosis following treatment with zoledronate (Zometa)." The authors, from the departments of pathology, nephrology, and internal medicine at Columbia Presbyterian Hospital in New York, Morristown Memorial Hospital in New Jersey, and Community Medical Center in East Toms River, New Jersey, evaluated six patients who had kidney failure after receiving Zometa (five of them diagnosed with myeloma, the sixth with Paget's Disease of the bone). All six of the patients had bone disease, and all received pamidronate (Aredia) before being switched to Zometa. Of note: none of the six patients had previous evidence of kidney disease. The mean duration of Zometa therapy for these patients was 4.7 months before renal failure occurred. All had received the correct, recommended dose: 4 mg of Zometa once a month, infused over at least 15 minutes.

In addition, three abstracts presented at the most recent ASCO (American Society of Clinical Oncology) meetings in Chicago, raised concerns about kidney toxicity with Zometa and, as in the above article, particularly in patients switching from Aredia to Zometa.

As a result of similar reports from around the country, Novartis, the company that makes both Aredia and Zometa, has proposed a set of guidelines for physicians who treat myeloma patients. These guidelines include the following precautions:

In order to avoid an infusion rate that is more rapid than planned or anticipated, an infusion time of 30 minutes can be strongly considered. Using a 30 minute infusion time provides some leeway for the infusion center and can help prevent Zometa from ever being infused in less than 15 minutes.

With the above caveats in mind, you should be scrupulous in discussing with your doctor whether or not Zometa is an appropriate choice for you, and in turn, your doctor should be scrupulous in monitoring your serum creatinine level before your monthly infusion of bisphosphonates.


What's New in Research:

Newly Identified Tumor Suppressor Cooperates With p53 to Protect Mice Against Tumors
In a study published in the Aug. 8, 2003, issue of the journal Cell, researchers at the National Cancer Institute demonstrate that reducing or eliminating the H2AX gene in mice that lack p53, a well-known tumor suppressor gene, causes an increase in the number of tumors that develop.


What's New in Clinical Trials:

If you would like to browse trials currently open for enrollment, visit the Clinical Trials page of the IMF web site. Among the links, you will find CenterWatch and EmergingMed. The IMF has entered into partnerships with them to assist you in matching trials to your particular patient profile (i.e., stage of disease, previous treatment, how well you are able to carry out the activities of daily living, etc.) and by doing so, increase your chances of being eligible. You can also learn more about clinical trials by reviewing materials from the National Cancer Institute.


Advocacy Update:
Upcoming Seminars and Conferences:
Upcoming Fundraisers:

FUNdraising Made Easy
You know you want to do something, but deciding on what to do can be confusing. The IMF can help. This year, our members really rallied 'round the cause, picked up the gauntlet, and raised a lot of money for myeloma research and programs. We are already getting calls from new members who want to join in the effort and hold an event in 2004. Suzanne Battaglia is waiting for your call. She is here to help you plan and execute your event, so please write, call or email (SBattaglia@myeloma.org) so that you can get on our Calendar of Events! See what you can do in your community to help further the goal of finding the cure!

Ralph Ferrizzi Memorial Golf Tournament
August 23, 2003
Allentown, PA

Exciting Opportunities
Items of Interest:

Shop for the Cure!


Many of the internet's most popular merchants will donate a portion of your purchases to the IMF if you enter their sites using the links on our Shop For The Cure page. You can also use the special shortcut URLs listed below:



So, Shop For The Cure by using these links to the same get great service and low prices you're used to while helping support the IMF!


Help Us Help Others...
As a non-profit organization, the IMF is completely dependent on the support of our members. Please consider showing your support by making a tax-deductible donation today. Donations in honor of a friend or family member make great gifts and are a wonderful way to celebrate a special occasion. You can donate online or by calling the IMF at (800) 452-CURE. We sincerely thank you for your support.


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