Thursday, June 14, 2018 10:32:36 AM
Here is an NIH extract on the problems with treating elderly patients with AML. The need for a combination therapy with LDAC certainly exists. Note that Dr. Cortez is an author.
South Asian J Cancer. 2015 Jan-Mar; 4(1): 1–2.
doi: 10.4103/2278-330X.149900
PMCID: PMC4382773
PMID: 25839008
The changing face of acute myeloid leukemia therapeutics in the elderly population
Naval Daver and Jorge Cortes
Author information ? Copyright and License information ? Disclaimer
Acute myeloid leukemia (AML) is primarily a disease of the elderly. 66% of patients with newly diagnosed AML in the United States are 65 years and older.[1,2,3] Elderly patients (≥60–65 years) with AML have a poor prognosis attributable to having disease that is inherently more resistant to current standard cytotoxic agents and/or relatively poor tolerance of these agents.[4,5,6] Furthermore, elderly patients with AML more frequently have an antecedent hematological disorder, unfavorable cytogenetics, and poorer performance status at presentation[5,7] As a result, despite steady progress in the therapy of AML in younger patients, the treatment of elderly AML has not improved significantly over the last four decades.[3,8,9] The 4–8 weeks mortality with intensive chemotherapy is 30–50% in these patients, and the median survival is 4–7 months.
The poor historical outcomes with intensive chemotherapy have resulted in reluctance by physicians to treat elderly patients with AML. A review of the Surveillance, Epidemiology and End Results and Medicare databases revealed that only 33% of elderly AML patients received leukemia directed treatment.[10] Median overall survival (OS) for the entire group was 2.5 months. Median OS for treated patients was 6 months longer than for untreated patients. Burnett et al. reported that low-dose cytarabine (LDAC) was associated with a higher complete remission (CR) rate (18% vs. 1%, P < 0.001) and improved OS (estimated 1-year survival rate, 25%; vs. 5% P < 0.001) in elderly AML patients[11]. These results highlight the poor outcomes in general, but the potential benefit with leukemia-directed treatment rather than palliation in elderly AML patients, but also the pressing need to develop novel therapeutic strategies better suited for this patient population.[5] A number of these novel agents are currently being evaluated in ongoing clinical trials including the hypomethylating agents (decitabine, azacytidine, SGI-110), purine analogues (clofarabine, cladribine), vosaroxin, CPX351, volasertib, hedgehog inhibitors (PF-04449913, vismodegib), and pracinostat.
Hypomethylating agents are the most frequently used agents in the therapy of elderly AML in the US and Europe.[12] The DACO-016 study compared the efficacy and safety of decitabine (20 mg/m2/day for 5 days every 4-week) versus investigators choice (including LDAC 20 mg/m2/day for 10 days every 4-week or best supportive care) in 485 AML patients (median age 73 years) ineligible for cytotoxic chemotherapy.[12,13] The initial analysis showed a trend toward improved survival with decitabine (7.7 vs. 5.0 months; P = 0.108) that became significant (P = 0.037) with further follow-up. Azacitidine has been explored in elderly patients with AML with 20–30% blasts in a subset analysis of the phase III AZA-001 trial.[14] Elderly AML patients (median age 75 years) were randomized to receive either azacitidine (75 mg/m2/day for 7 days every 4-week) or conventional care regimen (CCR; best supportive care, LDAC 40 mg/day for 10 days every 4-week or investigators choice).[15] Median OS was 10.4 months (1-year survival 47%) for patients receiving azacitidine compared to 6.5 months (1-year survival 34%) for patients receiving CCR (P = 0.083). SGI-110 is a second-generation hypomethylating agent with a longer half-life and more potent hypomethylation than first-generation hypomethylators. In a phase II study SGI-110 a CR rate of 53% was reported in treatment-naïve elderly patients not suitable for intensive chemotherapy.[16]
Purine analogs have shown encouraging results as single-agents or in combination with LDAC. We have previously demonstrated that the combination of clofarabine and LDAC achieves high response rates with low induction mortality in elderly patients with previously untreated AML.[17] Similarly, cladribine and LDAC alternating with decitabine has been well tolerated with no 4-week mortality, a CR rate of 58%, and a 1-year OS rate of 51%.[18]
A number of novel therapeutic agents are currently being evaluated in elderly patients with AML (>60–65 years). These include volasertib (a Polo-like kinase 1 inhibitor), vosaroxin (a quinolone derivative topoisomerase II inhibitor with reduced cardiotoxocity), CPX351 (a liposomal formulation of cytarabine and daunorubicin at a fixed molar ratio), PF-04449913 (a small molecule inhibitor of the Sonic Hedgehog Pathway) and pracinostat (a pan-histone deacetylase inhibitor). These drugs are currently in phase II/III studies either as single agents or in combination with hypomethylators or LDAC.
In addition to traditional risk factors such as age, cytogenetics, and performance status, factors such as molecular mutations have prognostic and therapeutic impact in AML. A number of mutated or deregulated genes conferring unfavorable (FLT3-ITD, IDH1/IDH2, WT1, MLL-PTD, TP53, KIT, EVI1, ERG, BAALC), indeterminate (NRAS, KRAS, RUNX1, JAK2, TET2, ASXL1, CBL) or favorable (NPM1, CEBPA1, GATA2) prognosis have been identified.[19,20] In addition to their prognostic value, these mutations offer potential therapeutic targets. A number of clinically active agents targeting FLT3 ITD and/or D835 (such as quizartinib, crenolanib and sorafenib), MEK (activated in patients with NRAS/KRAS mutations) (such as GSK1120212 and MEK-162) and IDH1/IDH2 (such as ABT199 and AG221) are being investigated in AML. These agents are being used as either single-agents or in combination regimens. In many circumstances, the response rates with such targeted therapies are superior to those achieved with standard therapy with decreased toxicity.
Despite the lack of progress in the past decades that has led to a nihilistic approach to treatment of older patients with AML, significant progress is being made recently in the understanding of the biology and development of therapeutic options that offer a brighter future for this large subset of patients with AML.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4382773/
Recent BPTH News
- Bio-Path Holdings to Announce First Quarter 2024 Financial Results on May 15, 2024 • GlobeNewswire Inc. • 05/08/2024 11:00:00 AM
- Bio-Path Holdings, Inc. Announces Closing of $1.2 Million Registered Direct Offering Priced At-the-Market Under Nasdaq Rules • GlobeNewswire Inc. • 04/19/2024 04:14:04 PM
- Bio-Path Holdings, Inc. Announces $1.2 Million Registered Direct Offering Priced At-the-Market Under Nasdaq Rules • GlobeNewswire Inc. • 04/18/2024 05:57:59 PM
- Bio-Path Holdings Announces Successful Completion of Higher Dose Second Cohort in Phase 1/1b Clinical Trial of BP1002 in Refractory/Relapsed Acute Myeloid Leukemia (AML) Patients • GlobeNewswire Inc. • 04/18/2024 11:00:00 AM
- Bio-Path Holdings Expands Global Patent Portfolio • GlobeNewswire Inc. • 04/15/2024 11:00:00 AM
- Bio-Path Holdings Provides 2024 Clinical and Operational Update • GlobeNewswire Inc. • 04/02/2024 11:00:00 AM
- Form 8-K - Current report • Edgar (US Regulatory) • 03/11/2024 11:00:34 AM
- Form S-1 - General form for registration of securities under the Securities Act of 1933 • Edgar (US Regulatory) • 03/08/2024 10:11:50 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 03/08/2024 12:10:34 PM
- Bio-Path Holdings Reports Full Year 2023 Financial Results • GlobeNewswire Inc. • 03/08/2024 12:00:00 PM
- U.S. Index Futures Fluctuate Ahead of Key Jobs Report; Oil Prices Dip • IH Market News • 03/08/2024 11:22:25 AM
- Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405] • Edgar (US Regulatory) • 03/07/2024 09:21:27 PM
- Bio-Path Holdings to Announce Fourth Quarter and Full Year 2023 Financial Results on March 8, 2024 • GlobeNewswire Inc. • 03/01/2024 12:00:00 PM
- Form RW - Registration Withdrawal Request • Edgar (US Regulatory) • 02/29/2024 11:00:30 AM
- Form 8-K - Current report • Edgar (US Regulatory) • 02/23/2024 12:01:09 PM
- Bio-Path Holdings Announces 1-for-20 Reverse Stock Split • GlobeNewswire Inc. • 02/21/2024 12:00:00 PM
- Form SC 13G - Statement of acquisition of beneficial ownership by individuals • Edgar (US Regulatory) • 02/02/2024 09:39:37 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 02/02/2024 09:10:23 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 01/23/2024 10:20:23 PM
- Form S-1/A - General form for registration of securities under the Securities Act of 1933: [Amend] • Edgar (US Regulatory) • 01/23/2024 09:51:03 PM
- Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material • Edgar (US Regulatory) • 01/17/2024 09:52:48 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 01/10/2024 09:10:09 PM
- Bio-Path Holdings Announces Completion of First Dose Cohort in Phase 1 Clinical Trial Evaluating BP1002 to Treat Refractory/Relapsed Lymphoma and Refractory/Relapsed Chronic Lymphocytic Leukemia Patients • GlobeNewswire Inc. • 01/10/2024 12:00:00 PM
- Form DEF 14A - Other definitive proxy statements • Edgar (US Regulatory) • 01/04/2024 10:18:53 PM
- Form PRE 14A - Other preliminary proxy statements • Edgar (US Regulatory) • 12/22/2023 09:06:16 PM
Avant Technologies Equipping AI-Managed Data Center with High Performance Computing Systems • AVAI • May 10, 2024 8:00 AM
VAYK Discloses Strategic Conversation on Potential Acquisition of $4 Million Home Service Business • VAYK • May 9, 2024 9:00 AM
Bantec's Howco Awarded $4.19 Million Dollar U.S. Department of Defense Contract • BANT • May 8, 2024 10:00 AM
Element79 Gold Corp Successfully Closes Maverick Springs Option Agreement • ELEM • May 8, 2024 9:05 AM
Kona Gold Beverages, Inc. Achieves April Revenues Exceeding $586,000 • KGKG • May 8, 2024 8:30 AM
Epazz plans to spin off Galaxy Batteries Inc. • EPAZ • May 8, 2024 7:05 AM