1
|
García-Gutiérrez V, Breccia M, Jabbour E, Mauro M, Cortes JE. A clinician perspective on the treatment of chronic myeloid leukemia in the chronic phase. J Hematol Oncol 2022; 15:90. [PMID: 35818053 PMCID: PMC9272596 DOI: 10.1186/s13045-022-01309-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 06/02/2022] [Indexed: 11/10/2022] Open
Abstract
Tyrosine kinase inhibitors (TKIs) have vastly improved long-term outcomes for patients with chronic myeloid leukemia (CML). After imatinib (a first-generation TKI), second- and third-generation TKIs were developed. With five TKIs (imatinib, dasatinib, bosutinib, nilotinib, and ponatinib) targeting BCR::ABL approved in most countries, and with the recent approval of asciminib in the USA, treatment decisions are complex and require assessment of patient-specific factors. Optimal treatment strategies for CML continue to evolve, with an increased focus on achieving deep molecular responses. Using clinically relevant case studies developed by the authors of this review, we discuss three major scenarios from the perspective of international experts. Firstly, this review explores patient-specific characteristics that affect decision-making between first- and second-generation TKIs upon initial diagnosis of CML, including patient comorbidities. Secondly, a thorough assessment of therapeutic options in the event of first-line treatment failure (as defined by National Comprehensive Cancer Network and European LeukemiaNet guidelines) is discussed along with real-world considerations for monitoring optimal responses to TKI therapy. Thirdly, this review illustrates the considerations and importance of achieving treatment-free remission as a treatment goal. Due to the timing of the writing, this review addresses global challenges commonly faced by hematologists treating patients with CML during the COVID-19 pandemic. Lastly, as new treatment approaches continue to be explored in CML, this review also discusses the advent of newer therapies such as asciminib. This article may be a useful reference for physicians treating patients with CML with second-generation TKIs and, as it is focused on the physicians' international and personal experiences, may give insight into alternative approaches not previously considered.
Collapse
Affiliation(s)
- Valentin García-Gutiérrez
- Servicio Hematología y Hemoterapia, Hospital Universitario Ramón y Cajal, Instituto Ramón y Cajal de Investigación Sanitaria (IRYCIS), Madrid, Spain
| | - Massimo Breccia
- Department of Translational and Precision Medicine, Sapienza University, Rome, Italy
| | - Elias Jabbour
- The University of Texas MD Anderson Cancer Center, Houston, TX USA
| | - Michael Mauro
- Memorial Sloan Kettering Cancer Center, New York, NY USA
| | | |
Collapse
|
2
|
Bosi GR, Fogliatto LM, Costa TEV, Grokoski KC, Pereira MP, Bugs N, Kalil M, Fraga C, Daudt LE, Silla LMDR. What happens to intolerant, relapsed or refractory chronic myeloid leukemia patients without access to clinical trials? Hematol Transfus Cell Ther 2019; 41:222-228. [PMID: 31085148 PMCID: PMC6732531 DOI: 10.1016/j.htct.2018.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Revised: 09/07/2018] [Accepted: 11/13/2018] [Indexed: 02/02/2023] Open
Abstract
Objective To assess clinical outcomes of intolerant, relapsed or refractory patients who could not be treated with new tyrosine kinase inhibitors or experimental therapies. Methods A retrospective cohort of 90 chronic myeloid leukemia patients in all phases of the disease treated with imatinib mesylate as their first TKI therapy, and with dasatinib or nilotinib as the next line of therapy. We evaluated clinical outcomes of these patients, with special focus on the group that needed more than two therapy lines. Results Thirty-nine percent of patients were refractory or intolerant to imatinib. An 8-year overall survival rate of the patients who went through three or more lines of treatment was significantly lower, compared to those who were able to maintain imatinib as their first-line therapy (83% and 22%, respectively p < 0.01). Decreased overall survival was associated with advanced-phase disease (p < 0.01), failure to achieve major molecular response in first-line treatment (p < 0.01) and interruption of first-line treatment due to any reason (p = 0.023). Failure in achieving complete cytogenetic response and major molecular response and treatment interruption were associated with the progression to the third-line treatment. Conclusion The critical outcome observed in relapsed, intolerant or refractory chronic phase CML patients reflects the unmet need for this group of patients without an alternative therapy, such as new drugs or experimental therapies in clinical trials. Broader access to newer treatment possibilities is a crucial asset to improve survival among CML patients, especially those refractory or intolerant to first-line therapies.
Collapse
Affiliation(s)
| | | | | | | | | | - Nathan Bugs
- Universidade Federal do Rio Grande do Sul (UFRS), Porto Alegre, RS, Brazil
| | - Marco Kalil
- Universidade Federal do Rio Grande do Sul (UFRS), Porto Alegre, RS, Brazil
| | - Christina Fraga
- Universidade Federal do Rio Grande do Sul (UFRS), Porto Alegre, RS, Brazil
| | | | | |
Collapse
|
3
|
Rashid N, Koh HA, Lin KJ, Stwalley B, Felber E. Real world treatment patterns in chronic myeloid leukemia patients newly initiated on tyrosine kinase inhibitors in an U.S. integrated healthcare system. J Oncol Pharm Pract 2017; 24:253-263. [PMID: 29284347 DOI: 10.1177/1078155217697484] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Purpose To evaluate treatment patterns in patients diagnosed with incident chronic myelogenous leukemia (CML) newly initiating therapy with imatinib, dasatinib, or nilotinib. Patients were followed to determine switching and discontinuation rates. Factors associated with switching or discontinuation from index TKI therapy, reasons for discontinuation based on electronic chart notes, and frequency of laboratory monitoring were assessed during the follow-up period. Methods A retrospective cohort study was conducted in chronic myelogenous leukemia patients aged ≥ 18 years who were identified from the Kaiser Permanente Southern California (KPSC) Cancer Registry database during the study time period of 1 January 2007 to 12 December 2013. The index date was defined as the date of the first TKI prescription (imatinib, dasatinib, or nilotinib) identified during the study time period with no prior history of TKI use within 12 months. Patients had to have continuous membership with drug benefit eligibility and no prior history of stem cell transplant (SCT) or other cancers during the 12 months prior to the index date. Baseline characteristics were identified during 12 months prior to the index date and outcomes were identified during the follow-up period after the index date. All patients were followed from index TKI therapy until end of study time period (12 December 2014), death, stem cell transplant, or disenrollment from the health plan unless one of the following occurred first: a patient switched their index therapy, or a patient discontinued their index therapy. Forward stepwise selection multivariable logistic regression models were used to evaluate factors associated with patients who continued therapy compared to those who switched or discontinued therapy with the index TKI. Chart notes were reviewed 30 days prior and 30 days post index TKI discontinuation to evaluate reasons for discontinuation. Molecular and cytogenetic testing frequency was also assessed during the follow-up period among the different patient groups. Results Two hundred sixteen patients were identified with incident chronic myelogenous leukemia and use of TKI therapy: 189 (87.5%) received imatinib, 19 (8.8%) received dasatinib, and 8 (3.7%) received nilotinib. The mean age on index date was 53 years and 63% were male; 103 patients (48%) continued on their index therapy, while 62 patients (28%) switched, and 51 patients (24%) discontinued.
Collapse
MESH Headings
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Cohort Studies
- Dasatinib/therapeutic use
- Databases, Factual
- Delivery of Health Care, Integrated/methods
- Delivery of Health Care, Integrated/trends
- Female
- Humans
- Imatinib Mesylate/therapeutic use
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/epidemiology
- Logistic Models
- Male
- Middle Aged
- Protein Kinase Inhibitors/therapeutic use
- Protein-Tyrosine Kinases/antagonists & inhibitors
- Pyridines/therapeutic use
- Pyrimidines/therapeutic use
- Registries
- Retrospective Studies
- United States/epidemiology
- Young Adult
Collapse
Affiliation(s)
- Nazia Rashid
- 1 Kaiser Permanente, Southern California Region, Drug Information Services, Downey, CA, USA
| | - Han A Koh
- 2 Southern California Permanente Medical Group, Kaiser Permanente Southern California, Bellflower, CA, USA
| | - Kathy J Lin
- 1 Kaiser Permanente, Southern California Region, Drug Information Services, Downey, CA, USA
| | - Brian Stwalley
- 3 Bristol-Myers Squibb, US Medical Health Services (Field), CA, USA
| | - Eugene Felber
- 3 Bristol-Myers Squibb, US Medical Health Services (Field), CA, USA
| |
Collapse
|
4
|
Stagno F, Stella S, Spitaleri A, Pennisi MS, Di Raimondo F, Vigneri P. Imatinib mesylate in chronic myeloid leukemia: frontline treatment and long-term outcomes. Expert Rev Anticancer Ther 2016; 16:273-8. [DOI: 10.1586/14737140.2016.1151356] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
5
|
Russo D, Malagola M, Skert C, Cancelli V, Turri D, Pregno P, Bergamaschi M, Fogli M, Testoni N, De Vivo A, Castagnetti F, Pungolino E, Stagno F, Breccia M, Martino B, Intermesoli T, Cambrin GR, Nicolini G, Abruzzese E, Tiribelli M, Bigazzi C, Usala E, Russo S, Russo-Rossi A, Lunghi M, Bocchia M, D'Emilio A, Santini V, Girasoli M, Lorenzo RD, Bernardi S, Palma AD, Cesana BM, Soverini S, Martinelli G, Rosti G, Baccarani M. Managing chronic myeloid leukaemia in the elderly with intermittent imatinib treatment. Blood Cancer J 2015; 5:e347. [PMID: 26383820 PMCID: PMC4648524 DOI: 10.1038/bcj.2015.75] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 07/21/2015] [Indexed: 01/18/2023] Open
Abstract
The aim of this study was to investigate the effects of a non-standard, intermittent imatinib treatment in elderly patients with Philadelphia-positive chronic myeloid leukaemia and to answer the question on which dose should be used once a stable optimal response has been achieved. Seventy-six patients aged ⩾65 years in optimal and stable response with ⩾2 years of standard imatinib treatment were enrolled in a study testing a regimen of intermittent imatinib (INTERIM; 1-month on and 1-month off). With a minimum follow-up of 6 years, 16/76 patients (21%) have lost complete cytogenetic response (CCyR) and major molecular response (MMR), and 16 patients (21%) have lost MMR only. All these patients were given imatinib again, the same dose, on the standard schedule and achieved again CCyR and MMR or an even deeper molecular response. The probability of remaining on INTERIM at 6 years was 48% (95% confidence interval 35-59%). Nine patients died in remission. No progressions were recorded. Side effects of continuous treatment were reduced by 50%. In optimal and stable responders, a policy of intermittent imatinib treatment is feasible, is successful in about 50% of patients and is safe, as all the patients who relapsed could be brought back to optimal response.
Collapse
Affiliation(s)
- D Russo
- Unit of Blood Diseases and Stem Cell Transplantation, University of Brescia, Brescia, Italy
| | - M Malagola
- Unit of Blood Diseases and Stem Cell Transplantation, University of Brescia, Brescia, Italy
| | - C Skert
- Unit of Blood Diseases and Stem Cell Transplantation, University of Brescia, Brescia, Italy
| | - V Cancelli
- Unit of Blood Diseases and Stem Cell Transplantation, University of Brescia, Brescia, Italy
| | - D Turri
- Ematologia 1-TMO, AOR Villa Sofia-Cervello, Palermo, Italy
| | - P Pregno
- S.C. Ematologia, Dipartimento di Oncologia ed Ematologia, A.O.U. Città della Salute e della Scienza di Torino, Torino, Italy
| | - M Bergamaschi
- Dipartimento di Terapie Oncologiche Integrate, IRCCS AOU S. Martino-IST, Genova, Italy
| | - M Fogli
- Institute of Hematology 'L. & A. Seràgnoli', DIMES, University of Bologna, Bologna, Italy
| | - N Testoni
- Institute of Hematology 'L. & A. Seràgnoli', DIMES, University of Bologna, Bologna, Italy
| | - A De Vivo
- Institute of Hematology 'L. & A. Seràgnoli', DIMES, University of Bologna, Bologna, Italy
| | - F Castagnetti
- Institute of Hematology 'L. & A. Seràgnoli', DIMES, University of Bologna, Bologna, Italy
| | - E Pungolino
- Division of Hematology, Department of Oncology and Hematology, Niguarda Ca' Granda Hospital, Milan, Italy
| | - F Stagno
- Divisione Clinicizzata di Ematologia AOU Policlinico-V. Emanuele, University of Catania, Catania, Italy
| | - M Breccia
- Azienda Policlinico Umberto I, Sapienza Università, Roma, Italy
| | - B Martino
- Hematology Unit, ‘Bianchi-Melacrino-Morelli' Hospital, Reggio Calabria, Italy
| | - T Intermesoli
- Hematology and Bone Marrow Transplant Unit, Azienda Ospedaliera Papa Giovanni XXIII, Bergamo, Italy
| | - G R Cambrin
- University of Turin, San Luigi Gonzaga Hospital, Turin, Italy
| | - G Nicolini
- Hematology and Hematopoietic Stem Cell Transplant Center, San Salvatore Hospital, Pesaro, Italy
| | - E Abruzzese
- Hematology, S Eugenio Hospital Tor Vergata University, Rome, Italy
| | - M Tiribelli
- Division of Hematology and BMT, Azienda Ospedaliero—Universitaria di Udine, Udine, Italy
| | - C Bigazzi
- Hematology, Mazzoni Hospital, Ascoli Piceno, Italy
| | - E Usala
- U O Ematologia e CTMO Ospedale A., Businco-Cagliari, Italy
| | - S Russo
- UOC Ematologia AOU 'G Martino' Policlinico Universitario di Messina, Messina, Italy
| | - A Russo-Rossi
- Division of Hematology, University of Bari, Bari, Italy
| | - M Lunghi
- Division of Hematology, Department of Clinical and Experimental Medicine, Amedeo Avogadro University of Eastern Piedmont, Novara, Italy
| | - M Bocchia
- Hematology and Transplants, University of Siena and AOUS, Siena, Italy
| | - A D'Emilio
- Department of Cellular Therapies and Haematology, San Bortolo Hospital, Vicenza, Italy
| | - V Santini
- Unità di Ematologia, AOU Careggi, University of Florence, Florence, Italy
| | - M Girasoli
- Hematology Department, 'A. Perrino' Hospital, Brindisi, Italy
| | - R Di Lorenzo
- Division of Haematology, Spirito Santo Hospital, Pescara, Italy
| | - S Bernardi
- Unit of Blood Diseases and Stem Cell Transplantation, University of Brescia, Brescia, Italy
| | - A Di Palma
- Unit of Blood Diseases and Stem Cell Transplantation, University of Brescia, Brescia, Italy
| | - B M Cesana
- DMMT, Unit of Medical Statistics, University of Brescia, Brescia, Italy
| | - S Soverini
- Institute of Hematology 'L. & A. Seràgnoli', DIMES, University of Bologna, Bologna, Italy
| | - G Martinelli
- Institute of Hematology 'L. & A. Seràgnoli', DIMES, University of Bologna, Bologna, Italy
| | - G Rosti
- Institute of Hematology 'L. & A. Seràgnoli', DIMES, University of Bologna, Bologna, Italy
| | - M Baccarani
- Department of Haematology-Oncology 'L. and A. Seràgnoli' – S. Orsola Malpighi Hospital, University of Bologna, Bologna, Italy
| |
Collapse
|
6
|
Fava C, Morotti A, Dogliotti I, Saglio G, Rege-Cambrin G. Update on emerging treatments for chronic myeloid leukemia. Expert Opin Emerg Drugs 2015; 20:183-96. [DOI: 10.1517/14728214.2015.1031217] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
7
|
Murai K, Akagi T, Shimosegawa K, Sugawara T, Ishizawa K, Ito S, Murai K, Motegi M, Yokoyama H, Noji H, Tajima K, Kimura J, Chou T, Ogawa K, Harigae H, Kubo K, Oba K, Sakamoto J, Ishida Y. A prospective analysis of clinical efficacy and safety in chronic myeloid leukemia-chronic phase patients with imatinib resistance or intolerance as evaluated using European LeukemiaNet 2013 criteria. Eur J Haematol 2015; 95:558-65. [PMID: 25703064 DOI: 10.1111/ejh.12536] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/13/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND We conducted a phase II study to evaluate the efficacy and safety of dasatinib in Japanese patients with imatinib-resistant or imatinib-intolerant chronic myeloid leukemia (CML). METHODS From 2009 to 2011, 54 CML-chronic phase (CP) patients with resistance (n = 40) or intolerance (n = 25) to imatinib were registered to undergo dasatinib treatment. Eleven patients showed both resistance and intolerance to imatinib. Coincidentally, the resistance criteria in this study were the same as a non-optimal response to tyrosine kinase inhibitors (TKIs) as defined in the European LeukemiaNet (ELN) 2013 recommendations. RESULTS The overall incidence rate of major molecular response (MMR) at 12 months was 62.3% (n = 47). Forty patients with resistance to imatinib who were 'warning' and 'failure' patients based on the ELN 2013 recommendations were assessed; cumulative MMR and MR(4.5) rates were 62.5% (n = 39) and 21.0% (n = 40), respectively, at 12 months. Twelve patients who showed a BCR-ABL transcript level >1% on the international scale did not achieve a MMR or discontinued dasatinib treatment because of insufficient effects. With regard to safety issues, grade 3/4 non-hematologic adverse events (AEs) were infrequent. CONCLUSIONS Patients with non-optimal responses (who meet ELN 2013 warning and failure criteria) to imatinib should be switched quickly to dasatinib, which is less toxic in CML-CP patients, to improve their prognoses. A BCR-ABL1 IS of <1% at 3 months of dasatinib administration is a landmark for good therapeutic outcome.
Collapse
Affiliation(s)
- Kazunori Murai
- Department of Hematology and Oncology, Iwate Medical University, Morioka, Japan
| | - Tomoaki Akagi
- Department of Hematology, Aomori Prefectural Central Hospital, Aomori, Japan
| | - Kenji Shimosegawa
- Department of Hematology, Iwate Prefectural Chubu Hospital, Kitakami, Japan
| | | | - Kenichi Ishizawa
- Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shigeki Ito
- Department of Hematology and Oncology, Iwate Medical University, Morioka, Japan
| | - Keiko Murai
- Department of Hematology, Morioka Red Cross Hospital, Morioka, Japan
| | - Mutsuhito Motegi
- Department of Internal Medicine, Omagari Kosei Medical Center, Omagari, Japan
| | - Hisayuki Yokoyama
- Department of Hematology, National Hospital Organization, Sendai Medical Center, Sendai, Japan
| | - Hideyoshi Noji
- Department of Cardiology and Hematology, Fukushima Medical University, Fukushima, Japan
| | - Katsushi Tajima
- Department of Neurology, Hematology, Metabolism, Endocrinology, and Diabetology (DNHMED), Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Jun Kimura
- Department of Hematology, Yamagata City Hospital Saiseikan, Yamagata, Japan
| | - Takaaki Chou
- Department of Internal Medicine, Niigata Cancer Center Hospital, Niigata, Japan
| | - Kazuei Ogawa
- Department of Cardiology and Hematology, Fukushima Medical University, Fukushima, Japan
| | - Hideo Harigae
- Department of Hematology and Rheumatology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kohmei Kubo
- Department of Hematology, Aomori Prefectural Central Hospital, Aomori, Japan
| | - Koji Oba
- Department of Biostatistics, School of Public Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,Interfaculty Initiative in Information Studies, The University of Tokyo, Tokyo, Japan
| | | | - Yoji Ishida
- Department of Hematology and Oncology, Iwate Medical University, Morioka, Japan
| |
Collapse
|
8
|
Weyergang A, Berstad MEB, Bull-Hansen B, Olsen CE, Selbo PK, Berg K. Photochemical activation of drugs for the treatment of therapy-resistant cancers. Photochem Photobiol Sci 2015; 14:1465-75. [DOI: 10.1039/c5pp00029g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Resistance to chemotherapy, molecular targeted therapy as well as radiation therapy is a major obstacle for cancer treatment.
Collapse
Affiliation(s)
- Anette Weyergang
- Department of Radiation Biology
- Institute for Cancer Research
- The Norwegian Radium Hospital
- Oslo University Hospital
- Montebello
| | - Maria E. B. Berstad
- Department of Radiation Biology
- Institute for Cancer Research
- The Norwegian Radium Hospital
- Oslo University Hospital
- Montebello
| | - Bente Bull-Hansen
- Department of Radiation Biology
- Institute for Cancer Research
- The Norwegian Radium Hospital
- Oslo University Hospital
- Montebello
| | - Cathrine E. Olsen
- Department of Radiation Biology
- Institute for Cancer Research
- The Norwegian Radium Hospital
- Oslo University Hospital
- Montebello
| | - Pål K. Selbo
- Department of Radiation Biology
- Institute for Cancer Research
- The Norwegian Radium Hospital
- Oslo University Hospital
- Montebello
| | - Kristian Berg
- Department of Radiation Biology
- Institute for Cancer Research
- The Norwegian Radium Hospital
- Oslo University Hospital
- Montebello
| |
Collapse
|
9
|
Real-world Analysis of Tyrosine Kinase Inhibitor Treatment Patterns Among Patients With Chronic Myeloid Leukemia in the United States. Clin Ther 2015; 37:124-33. [DOI: 10.1016/j.clinthera.2014.10.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Revised: 09/18/2014] [Accepted: 10/23/2014] [Indexed: 01/28/2023]
|
10
|
Mechanism-based cancer therapy: resistance to therapy, therapy for resistance. Oncogene 2014; 34:3617-26. [PMID: 25263438 DOI: 10.1038/onc.2014.314] [Citation(s) in RCA: 179] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Revised: 08/19/2014] [Accepted: 08/19/2014] [Indexed: 12/18/2022]
Abstract
The introduction of targeted therapy promised personalized and efficacious cancer treatments. However, although some targeted therapies have undoubtedly improved prognosis and outcome for specific cancer patients, the recurrent problem of therapeutic resistance subdues present revolutionary claims in this field. The plasticity of tumor cells leads to the development of drug resistance by distinct mechanisms: (1) mutations in the target, (2) reactivation of the targeted pathway, (3) hyperactivation of alternative pathways and (4) cross-talk with the microenvironment. Moreover, the intra-tumor heterogeneity of most tumors can also limit therapeutic response. Interestingly, the early identification of some mechanisms of resistance led to the use of alternative agents that improved clinical benefit, demonstrating that an understanding of the molecular mechanisms driving resistance to specific therapies is of paramount importance. Here we review the most generalized mechanisms of resistance to targeted therapies, together with some experimental strategies employed to identify such mechanisms. Therapeutic failure is not an option and we need to understand the dynamics of tumor adaptation in order to adequately adjust therapies; in essence 'to fight fire with fire'.
Collapse
|
11
|
Kallen KJ, Theß A. A development that may evolve into a revolution in medicine: mRNA as the basis for novel, nucleotide-based vaccines and drugs. THERAPEUTIC ADVANCES IN VACCINES 2014; 2:10-31. [PMID: 24757523 DOI: 10.1177/2051013613508729] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Recent advances strongly suggest that mRNA rather than DNA will be the nucleotide basis for a new class of vaccines and drugs. Therapeutic cancer vaccines against a variety of targets have been developed on this basis and initial clinical experience suggests that preclinical activity can be successfully translated to human application. Likewise, prophylactic vaccines against viral pathogens and allergens have demonstrated their activity in animal models. These successes could be extended preclinically to mRNA protein and gene replacement therapy as well as the induction of pluripotent stem cells by mRNA encoded transcription factors. The production of mRNA-based vaccines and drugs is highly flexible, scalable and cost competitive, and eliminates the requirement of a cold chain. mRNA-based drugs and vaccines offer all the advantages of a nucleotide-based approach at reduced costs and represent a truly disruptive technology that may start a revolution in medicine.
Collapse
|
12
|
Hughes T, White D. Which TKI? An embarrassment of riches for chronic myeloid leukemia patients. HEMATOLOGY. AMERICAN SOCIETY OF HEMATOLOGY. EDUCATION PROGRAM 2013; 2013:168-175. [PMID: 24319178 DOI: 10.1182/asheducation-2013.1.168] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
With the approval in many countries of nilotinib and dasatinib for frontline therapy in chronic myeloid leukemia, clinicians now have to make a difficult choice. Because none of the 3 available tyrosine kinase inhibitors (TKIs) have shown a clear survival advantage, they all represent reasonable choices. However, in individual patients, the case may be stronger for a particular TKI. In the younger patient, in whom the prospect of eventually achieving treatment-free remission is likely to be of great importance, dasatinib or nilotinib may be preferred, although their advantage over imatinib in this setting remains to be proven. In patients with a higher risk of transformation (which is currently based on prognostic scoring), the more potent TKIs may be preferred because they appear to be more effective at reducing the risk of transformation to BC. However, imatinib still represents an excellent choice for many chronic myeloid leukemia patients. All of these considerations need to be made in the context of the patient's comorbidities, which may lead to one or more TKIs being ruled out of contention. Whatever first choice of TKI is made, treatment failure or intolerance must be recognized early because a prompt switch to another TKI likely provides the best chance of achieving optimal response.
Collapse
Affiliation(s)
- Timothy Hughes
- 1South Australian Health and Medical Research Institute, SA Pathology, and University of Adelaide, Adelaide, Australia
| | | |
Collapse
|