This Day On The Street
Continue to site
ADVERTISEMENT
This account is pending registration confirmation. Please click on the link within the confirmation email previously sent you to complete registration.
Need a new registration confirmation email? Click here

Updated Results Of Two Phase 2 Ibrutinib Studies In Patients With Mantle Cell Lymphoma Or Diffuse Large B-cell Lymphoma

SUNNYVALE, Calif., June 16, 2013 /PRNewswire/ -- Pharmacyclics, Inc. (the "Company") (Nasdaq: PCYC) today announced the results of two separate Phase 2 studies suggesting that ibrutinib, an investigational oral Bruton's tyrosine kinase (BTK) inhibitor, showed efficacy when used as a monotherapy in patients with relapsed/refractory mantle cell lymphoma (MCL) or diffuse large B-cell lymphoma (DLBCL). Pharmacyclics sponsored both studies and is jointly developing ibrutinib with Janssen Research & Development, LLC. The data were presented today at the European Hematology Association (EHA) 18 th Annual Congress in Stockholm, Sweden.

The findings presented at EHA for patients with MCL or DLBCL expand on the results reported by investigators last year at the American Society of Hematology Congress in December 2012. Ibrutinib was shown to achieve the following key results among patients with relapsed/refractory MCL:
  • An overall response rate (ORR) of 68%, including a complete response (CR) of 21% where all signs of cancer are gone, and a partial response (PR) of 47%.
  • The estimated median duration of response (DOR) in all responding patients was 17.5 months. The median progression-free survival (PFS) was 13.9 months, and the median overall survival (OS) has not yet been reached, but is estimated to be 58% at 18 months.
  • Treatment-emergent adverse events (AEs) reported in greater than 20% of patients included diarrhea (50%), fatigue (41%), nausea (31%), peripheral edema (28%), dyspnea (27%), constipation (25%), upper respiratory tract infection (23%), vomiting (23%) and decreased appetite (21%) and were consistent with previously reported data. Only 8 patients discontinued due to an AE.

Professor Simon Rule, Consultant Haematologist in the Department of Haematology at the Derriford Hospital in Plymouth, United Kingdom, presented the results of this study at the EHA Congress today. He explained, "To see these results from a single agent among MCL patients is quite significant and very promising. The fact that response rates continued to increase over time, with no new safety signals, is particularly reassuring."

In the second study among relapsed/refractory DLBCL patients, investigators examined whether ibrutinib would be more active in the Activated B-cell-like (ABC) subtype of DLBCL compared to the Germinal Center B-cell-like (GCB) subtype. The ABC subtype of DLBCL is dependent on the B-cell antigen receptor (BCR) pathway, of which BTK is a key element. Ibrutinib selectively inhibits BTK, with the aim of inhibiting malignant B-cell growth and proliferation. Results of this study show that:
  • Patients with the ABC subtype showed a preferential response to ibrutinib monotherapy compared to those with the GCB subtype (ORR = 41% vs 5%, respectively, p=0.007, Fisher's exact test).
  • Median overall survival (OS) was 9.7 months for the ABC subtype, compared to 3.35 months for the GCB subtype.
  • Safety data from 70 patients identified no new safety signals. Grade 3 or higher AEs were seen in greater than 3% of patients and included fatigue (9%), hyponatremia (9%), pneumonia (7%), dehydration (4%), and pleural effusion (4%).

"These results indicated that ibrutinib monotherapy was an effective treatment for some study patients who had ABC-subtype DLBCL," noted presenting investigator Sven de Vos, M.D., Ph.D., Associate Professor in the Department of Medicine at the UCLA Medical Center, Los Angeles, U.S.A., who presented the results at the EHA Congress today. "Given that patients with the ABC-subtype of DLBCL are difficult to treat, these results are very promising."

About IbrutinibIbrutinib was designed to specifically target and selectively inhibit an enzyme called BTK. BTK is a key mediator of at least three critical B-cell pro-survival mechanisms occurring in parallel — regulation of apoptosis, cell adhesion and cell migration and homing.

The effectiveness of ibrutinib alone or in combination with other treatments is being studied in several B-cell malignancies, including chronic lymphocytic leukemia/small lymphocytic lymphoma, mantle cell lymphoma, diffuse large B-cell lymphoma, follicular lymphoma, Waldenstrom's macroglobulinemia and multiple myeloma. To date 7 Phase III trials have been initiated with ibrutinib and a total of 30 ongoing trials are currently registered on http://www.clinicaltrials.gov/. Janssen Biotech, Inc. and Pharmacyclics entered a collaboration and license agreement in December 2011 to co-develop and co-commercialize ibrutinib.

About the MCL Study111 patients with relapsed/refractory MCL were treated with ibrutinib in this Phase 2 multicenter, open-label, study at 18 sites internationally and had received a median of three prior therapies. Patients were divided into two cohorts based on prior bortezomib exposure – either bortezomib-naive (n=63) or bortezomib-exposed (n=48). Both groups received 560 mg of ibrutinib orally, once a day until disease progression or no longer tolerated by the patient. The primary endpoint of the study was ORR, with secondary endpoints being DOR, PFS, OS and frequency and severity of AEs.

When a disease is described as 'relapsed', it means that it has returned after an initial partial or total remission.[1] 'Refractory' refers to cancer that has become resistant to current treatment.[2]

1 of 3

Check Out Our Best Services for Investors

Action Alerts PLUS

Portfolio Manager Jim Cramer and Director of Research Jack Mohr reveal their investment tactics while giving advanced notice before every trade.

Product Features:
  • $2.5+ million portfolio
  • Large-cap and dividend focus
  • Intraday trade alerts from Cramer
Quant Ratings

Access the tool that DOMINATES the Russell 2000 and the S&P 500.

Product Features:
  • Buy, hold, or sell recommendations for over 4,300 stocks
  • Unlimited research reports on your favorite stocks
  • A custom stock screener
Stocks Under $10

David Peltier uncovers low dollar stocks with serious upside potential that are flying under Wall Street's radar.

Product Features:
  • Model portfolio
  • Stocks trading below $10
  • Intraday trade alerts
14-Days Free
Only $9.95
14-Days Free
Dividend Stock Advisor

David Peltier identifies the best of breed dividend stocks that will pay a reliable AND significant income stream.

Product Features:
  • Diversified model portfolio of dividend stocks
  • Updates with exact steps to take - BUY, HOLD, SELL
Trifecta Stocks

Every recommendation goes through 3 layers of intense scrutiny—quantitative, fundamental and technical analysis—to maximize profit potential and minimize risk.

Product Features:
  • Model Portfolio
  • Intra Day Trade alerts
  • Access to Quant Ratings
Options Profits

Our options trading pros provide over 100 monthly option trading ideas and strategies to help you become a well-seasoned trader.

Product Features:
  • Actionable options commentary and news
  • Real-time trading community
SYM TRADE IT LAST %CHG

Markets

DOW 17,596.35 -350.33 -1.95%
S&P 500 2,057.64 -43.85 -2.09%
NASDAQ 4,958.4680 -122.0370 -2.40%

Free Reports

Top Rated Stocks Top Rated Funds Top Rated ETFs