Navigation Links
B cell receptor inhibitor causes chronic lymphocytic leukemia remission
Date:12/11/2011

SAN DIEGO - A new, targeted approach to treating chronic lymphocytic leukemia has produced durable remissions in a Phase I/II clinical trial for patients with relapsed or resistant disease, investigators report at the 53rd Annual Meeting of the American Society of Hematology.

"PCI-32765, one of a new class of experimental drugs called B cell receptor inhibitors, has shown impressive potential in this clinical trial for its effectiveness and particularly for its relatively minimal toxicity," said lead investigator Susan O'Brien, M.D., professor in the Department of Leukemia at The University of Texas MD Anderson Cancer Center.

According to the National Cancer Institute's Surveillance Epidemiology and End Results database, an estimated 14,570 people will receive a diagnosis of CLL in 2011 and about 4,380 patients will die of the disease.

Six-month progression free survival of 90-92 percent

Of 27 CLL patients treated at a dose of 420 milligrams daily, 70 percent had complete or partial remission at 10.2 months of median follow-up. Six-month progression-free survival was 92 percent. Patients received a median three prior treatments before entering the clinical trial.

At a higher dose of 840 mg, 44 percent of 34 patients achieved complete or partial remission at 6.5 months median follow-up, similar to the response rate of the lower-dose cohort at 6.2 months. Progression free survival at 6 months was 90 percent. Study participants had received a median of five prior treatments.

Overall, five patients (8 percent) of the 61 from both arms had progressive disease and 50 (82 percent) remained on the therapy.

Drug does not suppress blood cell production

CLL presently is treated with combination chemotherapies that can cause myelosuppression - inhibited bone marrow function leading to decreased production of blood cells. The resulting susceptibility to infection can be a problem for patients, O'Brien said.

"PCI-32765 is not myelosuppressive. The main side effect is mild diarrhea that is usually self-limiting," O'Brien said.

Chronic lymphocytic leukemia is caused by overproduction of defective B cell lymphocytes, white blood cells that fight infection by producing antibodies.

PCI-32765 is orally administered and inhibits the Burton's tyrosine kinas (BT) enzyme, which is central to B cell receptor signaling. The drug causes programmed cell death and hinders cell migration and adhesion in malignant B cells.

A Phase III clinical trial is planned. The clinical trial was funded by Pharmacyclics, Inc., the drug's developer.


'/>"/>

Contact: Scott Merville
smerville@mdanderson.org
713-516-4855
University of Texas M. D. Anderson Cancer Center
Source:Eurekalert

Related medicine news :

1. Toll-like receptors play role in brain damage in newborns
2. Folate receptors may serve as a front door to ovarian cancer treatment
3. Nuclear receptors battle it out during metamorphosis in new fruit fly model
4. Cell receptor could allow measles virus to target tumors
5. CSHL structural biologists reveal novel drug binding site in NMDA receptor subunit
6. Historic first images of rod photoreceptors in the living human eye
7. Older age memory loss tied to stress hormone receptor in brain
8. Entire T-cell receptor repertoire sequenced revealing extensive and unshared diversity
9. Researchers get a grip on nervous systems receptors
10. Feast or famine: Researchers identify leptin receptors sidekick as a target for appetite regulation
11. Targeting nicotine receptors to treat cognitive impairments in schizophrenia
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/4/2016)... , ... December 03, 2016 , ... While James Earl ... serving as host for in a show called "Front Page". One of the forthcoming ... years, breast cancer rates have plummeted in large part due to early detection. Like ...
(Date:12/4/2016)... Washington DC (PRWEB) , ... December 04, 2016 , ... ... Environmental, one of the most certified and experienced Indoor Air Quality Companies in VA, ... Assessment and Remediation Regulations. , The new mold law in the district ...
(Date:12/2/2016)... ... December 02, 2016 , ... On Dec. 2, 2016, CURE® magazine ... San Diego honoring the 2016 MPN Heroes—eight individuals who have made a difference in ... and beyond the standard of care, demonstrating leadership within the MPN community and/or a ...
(Date:12/2/2016)... ... 2016 , ... Center for Autism and Related Disorders (CARD) Portland today announced ... disorder (ASD) and other developmental disabilities. The group, which is being launched with the ... the opportunity to share stories and advice, seek help, and continue their education on ...
(Date:12/2/2016)... ... December 02, 2016 , ... ... California, will be included in the 2016 “Guide to America’s Top Plastic Surgeons” ... on the amalgamation of their education, experience, and professional associations. , One ...
Breaking Medicine News(10 mins):
(Date:12/4/2016)... 3, 2016 Johnson & Weaver, LLP announces that ... of Zimmer Biomet Holdings, Inc. (NYSE: ZBH ) ... 31, 2016 (the "Class Period"). Zimmer Biomet provides ... orthopaedic reconstructive products, such as knee and hip reconstructive products. ... , , ...
(Date:12/4/2016)...   Pairnomix, LLC, a genetic research company and ... the White House, today announced that findings from its first ... candidate therapies for a patient with epileptic encephalopathy caused by ... at the 70 th Annual Meeting of the ... , December 2-6, 2016.  Pairnomix, unique process involves ...
(Date:12/4/2016)...  Results from the Phase II SUSTAIN study show ... the median annual rate of sickle cell-related pain crises ... p=0.010) in patients with or without hydroxyurea therapy 1 ... featured in the official press briefing at the 58 ... and presented during the Plenary Scientific Session tomorrow (Abstract ...
Breaking Medicine Technology: