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Genetic Screens in Isogenic Mammalian Cell Lines Without Single Cell Cloning
ARTICLE https://doi.org/10.1038/s41467-020-14620-6 OPEN Genetic screens in isogenic mammalian cell lines without single cell cloning Peter C. DeWeirdt1,2, Annabel K. Sangree1,2, Ruth E. Hanna1,2, Kendall R. Sanson1,2, Mudra Hegde 1, Christine Strand 1, Nicole S. Persky1 & John G. Doench 1* Isogenic pairs of cell lines, which differ by a single genetic modification, are powerful tools for understanding gene function. Generating such pairs of mammalian cells, however, is labor- 1234567890():,; intensive, time-consuming, and, in some cell types, essentially impossible. Here, we present an approach to create isogenic pairs of cells that avoids single cell cloning, and screen these pairs with genome-wide CRISPR-Cas9 libraries to generate genetic interaction maps. We query the anti-apoptotic genes BCL2L1 and MCL1, and the DNA damage repair gene PARP1, identifying both expected and uncharacterized buffering and synthetic lethal interactions. Additionally, we compare acute CRISPR-based knockout, single cell clones, and small- molecule inhibition. We observe that, while the approaches provide largely overlapping information, differences emerge, highlighting an important consideration when employing genetic screens to identify and characterize potential drug targets. We anticipate that this methodology will be broadly useful to comprehensively study gene function across many contexts. 1 Genetic Perturbation Platform, Broad Institute of MIT and Harvard, 75 Ames Street, Cambridge, MA 02142, USA. 2These authors contributed equally: Peter C. DeWeirdt, -
The Role of PARP1 in Monocyte and Macrophage
cells Review The Role of PARP1 in Monocyte and Macrophage Commitment and Specification: Future Perspectives and Limitations for the Treatment of Monocyte and Macrophage Relevant Diseases with PARP Inhibitors Maciej Sobczak 1, Marharyta Zyma 2 and Agnieszka Robaszkiewicz 1,* 1 Department of General Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Lodz, Poland; [email protected] 2 Department of Immunopathology, Medical University of Lodz, 7/9 Zeligowskiego, Bldg 2, Rm177, 90-752 Lodz, Poland; [email protected] * Correspondence: [email protected]; Tel.: +48-42-6354449; Fax: +48-42-6354449 or +48-42-635-4473 Received: 4 August 2020; Accepted: 4 September 2020; Published: 6 September 2020 Abstract: Modulation of PARP1 expression, changes in its enzymatic activity, post-translational modifications, and inflammasome-dependent cleavage play an important role in the development of monocytes and numerous subtypes of highly specialized macrophages. Transcription of PARP1 is governed by the proliferation status of cells at each step of their development. Higher abundance of PARP1 in embryonic stem cells and in hematopoietic precursors supports their self-renewal and pluri-/multipotency, whereas a low level of the enzyme in monocytes determines the pattern of surface receptors and signal transducers that are functionally linked to the NFκB pathway. In macrophages, the involvement of PARP1 in regulation of transcription, signaling, inflammasome activity, metabolism, and redox balance supports macrophage polarization towards the pro-inflammatory phenotype (M1), which drives host defense against pathogens. On the other hand, it seems to limit the development of a variety of subsets of anti-inflammatory myeloid effectors (M2), which help to remove tissue debris and achieve healing. -
A Phase I and Pharmacokinetic Study of Irinotecan Given As a 7-Day
Vol. 10, 1657–1663, March 1, 2004 Clinical Cancer Research 1657 A Phase I and Pharmacokinetic Study of Irinotecan Given as a 7-Day Continuous Infusion in Metastatic Colorectal Cancer Patients Pretreated with 5-Fluorouracil or Raltitrexed Gianluca Masi,1 Alfredo Falcone,1 for activity, and we observed 3 (25%) partial responses, 2 Antonello Di Paolo,2 Giacomo Allegrini,1 (17%) minor responses, and 4 (33%) disease stabilizations. Romano Danesi,2 Cecilia Barbara,2 Conclusions: The administration of irinotecan as a 1 2 7-day continuous infusion every 21 days is feasible with Samanta Cupini, and Mario Del Tacca diarrhea being the dose-limiting toxicity; recommended 1Division of Medical Oncology, Department of Oncology, Civil 2 2 dose for Phase II studies is 20.0 mg/m /day. The comparison Hospital, Livorno, and Division of Pharmacology and of the present data with those obtained after a standard Chemotherapy, Department of Oncology, Transplants, and Advanced Technologies in Medicine, University of Pisa, Pisa, Italy 30–90 min. i.v. infusion of irinotecan demonstrates that continuous infusion improves the transformation of irinote- can to SN-38 and also results in increased glucuronidation of ABSTRACT the active metabolite. Antitumor activity in pretreated met- Purpose: The purpose is to determine the plasma phar- astatic colorectal cancer patients is encouraging. macokinetics, the maximum-tolerable dose and to prelimi- nary evaluate the antitumor activity of irinotecan admin- INTRODUCTION istered as a 7-day continuous infusion every 21 days in Irinotecan (CPT-11), a semisynthetic derivative of the nat- metastatic colorectal cancer patients pretreated with 5- ural alkaloid camptothecin, is a selective inhibitor of topoi- fluorouracil or raltitrexed. -
PARP Inhibitors Sensitize Ewing Sarcoma Cells to Temozolomide
Published OnlineFirst October 5, 2015; DOI: 10.1158/1535-7163.MCT-15-0587 Cancer Biology and Signal Transduction Molecular Cancer Therapeutics PARP Inhibitors Sensitize Ewing Sarcoma Cells to Temozolomide-Induced Apoptosis via the Mitochondrial Pathway Florian Engert1, Cornelius Schneider1, Lilly Magdalena Weib1,2,3, Marie Probst1,and Simone Fulda1,2,3 Abstract Ewing sarcoma has recently been reported to be sensitive to that subsequent to DNA damage-imposed checkpoint activa- poly(ADP)-ribose polymerase (PARP) inhibitors. Searching for tion and G2 cell-cycle arrest, olaparib/TMZ cotreatment causes synergistic drug combinations, we tested several PARP inhibi- downregulation of the antiapoptotic protein MCL-1, followed by tors (talazoparib, niraparib, olaparib, veliparib) together with activation of the proapoptotic proteins BAX and BAK, mitochon- chemotherapeutics. Here, we report that PARP inhibitors syner- drial outer membrane permeabilization (MOMP), activation of gize with temozolomide (TMZ) or SN-38 to induce apoptosis caspases, and caspase-dependent cell death. Overexpression of a and also somewhat enhance the cytotoxicity of doxorubicin, nondegradable MCL-1 mutant or BCL-2, knockdown of NOXA or etoposide, or ifosfamide, whereas actinomycin D and vincris- BAX and BAK, or the caspase inhibitor N-benzyloxycarbonyl-Val- tine show little synergism. Furthermore, triple therapy of ola- Ala-Asp-fluoromethylketone (zVAD.fmk) all significantly reduce parib, TMZ, and SN-38 is significantly more effective compared olaparib/TMZ-mediated apoptosis. These findings emphasize with double or monotherapy. Mechanistic studies revealed that the role of PARP inhibitors for chemosensitization of Ewing the mitochondrial pathway of apoptosis plays a critical role in sarcoma with important implications for further (pre)clinical mediating the synergy of PARP inhibition and TMZ. -
R&D Briefing 76
The Impact of Recent Regulatory Developments on the Mexican Therapeutic Landscape Access to innovative medicines is key to El acceso a medicamentos innovadores es clave para improving overall population health, reducing mejorar la salud de toda la población, para reducir los hospitalisation time and decreasing morbidity and tiempos de hospitalización, la morbilidad y la mortalidad mortality. An efficient regulatory process can be de un país. Un proceso regulatorio eficiente tiene un reflected in measurable positive health impacts; impacto positivo medible en la salud, y por el contrario, conversely, activities that slow or impede acciones que retrasan o impiden la eficiencia regulatoria y regulatory efficiency and predictability can be su predictibilidad pueden ser perjudiciales. La parálisis detrimental. Recent developments in the Mexican reciente del Sistema regulatorio mexicano respecto a la regulatory system for the assessments of evaluación de nuevos medicamentos innovadores innovative new products have had a negative conlleva un impacto negativo en la salud de la población impact on Mexican public health. mexicana. This Briefing addresses the impact of suspending Este informe analiza el impacto de la suspensión de las the activities of the New Molecules Committee actividades del Comité de Moléculas Nuevas (NMC, por (NMC) on the Mexican therapeutic landscape. sus siglas en inglés) sobre el horizonte terapéutico de First, we compared the way that “new medicines” México. En primer lugar, comparamos la definición de are defined within the context of the Mexican nuevos medicamentos según el contexto regulatorio regulatory system, with definitions used by mexicano con las definiciones adoptadas por otras comparable regulators and health organisations. agencias reguladoras u organizaciones de salud del We have also investigated the extent to which mundo. -
Comparative Efficacy and Safety of Lorlatinib and Alectinib for ALK
cancers Systematic Review Comparative Efficacy and Safety of Lorlatinib and Alectinib for ALK-Rearrangement Positive Advanced Non-Small Cell Lung Cancer in Asian and Non-Asian Patients: A Systematic Review and Network Meta-Analysis Koichi Ando 1,2,* , Ryo Manabe 1, Yasunari Kishino 1, Sojiro Kusumoto 1, Toshimitsu Yamaoka 3 , Akihiko Tanaka 1, Tohru Ohmori 1,4 and Hironori Sagara 1 1 Division of Respiratory Medicine and Allergology, Department of Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8666, Japan; [email protected] (R.M.); [email protected] (Y.K.); [email protected] (S.K.); [email protected] (A.T.); [email protected] (T.O.); [email protected] (H.S.) 2 Division of Internal Medicine, Showa University Dental Hospital Medical Clinic, Senzoku Campus, Showa University, 2-1-1 Kita-senzoku, Ohta-ku, Tokyo 145-8515, Japan 3 Advanced Cancer Translational Research Institute, Showa University, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan; [email protected] 4 Department of Medicine, Division of Respiratory Medicine, Tokyo Metropolitan Health and Hospitals Corporation, Ebara Hospital, 4-5-10 Higashiyukigaya, Ohta-ku, Tokyo 145-0065, Japan * Correspondence: [email protected]; Tel.: +81-3-3784-8532 Citation: Ando, K.; Manabe, R.; Kishino, Y.; Kusumoto, S.; Yamaoka, Simple Summary: The treatment of anaplastic lymphoma kinase (ALK) rearrangement-positive T.; Tanaka, A.; Ohmori, T.; Sagara, H. (ALK-p) advanced non-small cell lung cancer (NSCLC) remains a challenge. -
Horizon Scanning Status Report June 2019
Statement of Funding and Purpose This report incorporates data collected during implementation of the Patient-Centered Outcomes Research Institute (PCORI) Health Care Horizon Scanning System, operated by ECRI Institute under contract to PCORI, Washington, DC (Contract No. MSA-HORIZSCAN-ECRI-ENG- 2018.7.12). The findings and conclusions in this document are those of the authors, who are responsible for its content. No statement in this report should be construed as an official position of PCORI. An intervention that potentially meets inclusion criteria might not appear in this report simply because the horizon scanning system has not yet detected it or it does not yet meet inclusion criteria outlined in the PCORI Health Care Horizon Scanning System: Horizon Scanning Protocol and Operations Manual. Inclusion or absence of interventions in the horizon scanning reports will change over time as new information is collected; therefore, inclusion or absence should not be construed as either an endorsement or rejection of specific interventions. A representative from PCORI served as a contracting officer’s technical representative and provided input during the implementation of the horizon scanning system. PCORI does not directly participate in horizon scanning or assessing leads or topics and did not provide opinions regarding potential impact of interventions. Financial Disclosure Statement None of the individuals compiling this information have any affiliations or financial involvement that conflicts with the material presented in this report. Public Domain Notice This document is in the public domain and may be used and reprinted without special permission. Citation of the source is appreciated. All statements, findings, and conclusions in this publication are solely those of the authors and do not necessarily represent the views of the Patient-Centered Outcomes Research Institute (PCORI) or its Board of Governors. -
Arsenic Trioxide As a Radiation Sensitizer for 131I-Metaiodobenzylguanidine Therapy: Results of a Phase II Study
Arsenic Trioxide as a Radiation Sensitizer for 131I-Metaiodobenzylguanidine Therapy: Results of a Phase II Study Shakeel Modak1, Pat Zanzonico2, Jorge A. Carrasquillo3, Brian H. Kushner1, Kim Kramer1, Nai-Kong V. Cheung1, Steven M. Larson3, and Neeta Pandit-Taskar3 1Department of Pediatrics, Memorial Sloan Kettering Cancer Center, New York, New York; 2Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York; and 3Molecular Imaging and Therapy Service, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York sponse rates when compared with historical data with 131I-MIBG Arsenic trioxide has in vitro and in vivo radiosensitizing properties. alone. We hypothesized that arsenic trioxide would enhance the efficacy of Key Words: radiosensitization; neuroblastoma; malignant the targeted radiotherapeutic agent 131I-metaiodobenzylguanidine pheochromocytoma/paraganglioma; MIBG therapy 131 ( I-MIBG) and tested the combination in a phase II clinical trial. J Nucl Med 2016; 57:231–237 Methods: Patients with recurrent or refractory stage 4 neuroblas- DOI: 10.2967/jnumed.115.161752 toma or metastatic paraganglioma/pheochromocytoma (MP) were treated using an institutional review board–approved protocol (Clinicaltrials.gov identifier NCT00107289). The planned treatment was 131I-MIBG (444 or 666 MBq/kg) intravenously on day 1 plus arsenic trioxide (0.15 or 0.25 mg/m2) intravenously on days 6–10 and 13–17. Toxicity was evaluated using National Cancer Institute Common Metaiodobenzylguanidine (MIBG) is a guanethidine analog Toxicity Criteria, version 3.0. Response was assessed by Interna- that is taken up via the noradrenaline transporter by neuroendo- tional Neuroblastoma Response Criteria or (for MP) by changes in crine malignancies arising from sympathetic neuronal precursors 123I-MIBG or PET scans. -
Docetaxel Combined with Irinotecan Or 5-Fluorouracil in Patients with Advanced Oesophago-Gastric Cancer: a Randomised Phase II Study
British Journal of Cancer (2012) 107, 435–441 & 2012 Cancer Research UK All rights reserved 0007 – 0920/12 www.bjcancer.com Docetaxel combined with irinotecan or 5-fluorouracil in patients with advanced oesophago-gastric cancer: a randomised phase II study 1 *,1 2 3 4 5 5 6 A Roy , D Cunningham , R Hawkins ,HSo¨rbye , A Adenis , J-R Barcelo , G Lopez-Vivanco , G Adler , 7 8 9 10 11 12 13 14 J-L Canon , F Lofts , C Castanon , E Fonseca , O Rixe , J Aparicio , J Cassinello , M Nicolson , 15 16 17 17 18 19 20 M Mousseau , A Schalhorn , L D’Hondt , J Kerger , DK Hossfeld , C Garcia Giron , R Rodriguez , 21 22 P Schoffski and J-L Misset 1Department of Medicine, Royal Marsden Hospital, Sutton, London, SM25PT, UK; 2Department of Medical Oncology, University of Manchester, 3 4 Clinical Studies Manchester, M20 4BX UK; Department of Medical Oncology, Haukeland University Hospital, Bergen, Norway; Department of Gastrointestinal 5 6 Oncology, Centre Oscar Lambret, Lille, France; Department of Oncology, Hospital de Cruces Osakidetza, Basque Country, Spain; Department of 7 Medicine, University of Ulm, Robert-Koch-Strasse 8 D-89081, Ulm, Germany; Oncologie Me´dicale, Grand Hopital de Charleroi, 3, Grand’Rue Charleroi, 8 9 6000, Belgium; Department of Oncology, St George’s Hospital NHS Trust, London, UK; Department of Medical Oncology, Hospital Clinico de 10 11 Salamanca, Salamanca, Spain; Department of Medical Oncology, Hospital Universitario Paseo de San Vicente, Salamanca, Spain; Department of ˆ 12 13 Medical Oncology, Salpetrie`re Hospital, Paris, France; Department of Medical Oncology, Hospital Universitario La Fe, Valencia, Spain; Department of Medical Oncology, Hospital General Universitario de Guadalajara, Guadalajara, Spain; 14Department of Oncology, Aberdeen Royal Infirmary, Aberdeen, UK; 15Department of Oncology and Haematology, University Hospital, CHU de Grenoble, Grenoble, France; 16Klinikum der Universita¨t Mu¨nchen 17 18 Grosshadern, Munich, Germany; Chu Mont Godinne, Avenue Docteur G. -
Newer-Generation EGFR Inhibitors in Lung Cancer: How Are They Best Used?
cancers Review Newer-Generation EGFR Inhibitors in Lung Cancer: How Are They Best Used? Tri Le 1 and David E. Gerber 1,2,3,* 1 Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX 75390-8852, USA; [email protected] 2 Department of Clinical Sciences, University of Texas Southwestern Medical Center, Dallas, TX 75390-8852, USA 3 Division of Hematology-Oncology, Harold C. Simmons Comprehensive Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390-8852, USA * Correspondence: [email protected]; Tel.: +1-214-648-4180; Fax: +1-214-648-1955 Received: 15 January 2019; Accepted: 4 March 2019; Published: 15 March 2019 Abstract: The FLAURA trial established osimertinib, a third-generation epidermal growth factor receptor (EGFR) tyrosine kinase inhibitor (TKI), as a viable first-line therapy in non-small cell lung cancer (NSCLC) with sensitizing EGFR mutations, namely exon 19 deletion and L858R. In this phase 3 randomized, controlled, double-blind trial of treatment-naïve patients with EGFR mutant NSCLC, osimertinib was compared to standard-of-care EGFR TKIs (i.e., erlotinib or gefinitib) in the first-line setting. Osimertinib demonstrated improvement in median progression-free survival (18.9 months vs. 10.2 months; hazard ratio 0.46; 95% CI, 0.37 to 0.57; p < 0.001) and a more favorable toxicity profile due to its lower affinity for wild-type EGFR. Furthermore, similar to later-generation anaplastic lymphoma kinase (ALK) inhibitors, osimertinib has improved efficacy against brain metastases. Despite this impressive effect, the optimal sequencing of osimertinib, whether in the first line or as subsequent therapy after the failure of earlier-generation EGFR TKIs, is not clear. -
ALK Tyrosine Kinase Inhibitors, 5.01.538
PHARMACY POLICY – 5.01.538 ALK Tyrosine Kinase Inhibitors Effective Date: June 1, 2021 RELATED MEDICAL POLICIES: Last Revised: May 20, 2021 None Replaces: N/A Select a hyperlink below to be directed to that section. POLICY CRITERIA | CODING | RELATED INFORMATION EVIDENCE REVIEW | REFERENCES | HISTORY ∞ Clicking this icon returns you to the hyperlinks menu above. Introduction The anaplastic lymphoma kinase (ALK) gene provides instructions for making a specific kind of protein called ALK receptor tyrosine kinase. This protein helps cells communicate. When this gene is damaged, cell growth can get stuck in the “on” position and cells grow uncontrollably. Changes to the ALK gene can lead to non-small-cell lung cancer. Tyrosine kinase inhibitors block specific enzymes, essentially working to turn the cell growth to the “off” position. ALK tyrosine kinase inhibitors specifically targets cancers caused by changes to the ALK gene. This policy describes when this specific form of chemotherapy may be considered medically necessary. Note: The Introduction section is for your general knowledge and is not to be taken as policy coverage criteria. The rest of the policy uses specific words and concepts familiar to medical professionals. It is intended for providers. A provider can be a person, such as a doctor, nurse, psychologist, or dentist. A provider also can be a place where medical care is given, like a hospital, clinic, or lab. This policy informs them about when a service may be covered. Policy Coverage Criteria Drug Medical Necessity Alecensa® (alectinib) Alecensa® (alectinib) may be considered medically necessary for the treatment of adult patients with advanced or Drug Medical Necessity metastatic non-small cell lung cancer (NSCLC) that is anaplastic lymphoma kinase (ALK)-positive. -
Sequential ALK Inhibitors Can Select for Lorlatinib-Resistant Compound ALK Mutations in ALK-Positive Lung Cancer
Published OnlineFirst April 12, 2018; DOI: 10.1158/2159-8290.CD-17-1256 RESEARCH ARTICLE Sequential ALK Inhibitors Can Select for Lorlatinib-Resistant Compound ALK Mutations in ALK-Positive Lung Cancer Satoshi Yoda1,2, Jessica J. Lin1,2, Michael S. Lawrence1,2,3, Benjamin J. Burke4, Luc Friboulet5, Adam Langenbucher1,2,3, Leila Dardaei1,2, Kylie Prutisto-Chang1, Ibiayi Dagogo-Jack1,2, Sergei Timofeevski4, Harper Hubbeling1,2, Justin F. Gainor1,2, Lorin A. Ferris1,2, Amanda K. Riley1, Krystina E. Kattermann1, Daria Timonina1, Rebecca S. Heist1,2, A. John Iafrate6, Cyril H. Benes1,2, Jochen K. Lennerz6, Mari Mino-Kenudson6, Jeffrey A. Engelman7, Ted W. Johnson4, Aaron N. Hata1,2, and Alice T. Shaw1,2 Downloaded from cancerdiscovery.aacrjournals.org on September 30, 2021. © 2018 American Association for Cancer Research. Published OnlineFirst April 12, 2018; DOI: 10.1158/2159-8290.CD-17-1256 ABSTRACT The cornerstone of treatment for advanced ALK-positive lung cancer is sequential therapy with increasingly potent and selective ALK inhibitors. The third-generation ALK inhibitor lorlatinib has demonstrated clinical activity in patients who failed previous ALK inhibi- tors. To define the spectrum ofALK mutations that confer lorlatinib resistance, we performed accel- erated mutagenesis screening of Ba/F3 cells expressing EML4–ALK. Under comparable conditions, N-ethyl-N-nitrosourea (ENU) mutagenesis generated numerous crizotinib-resistant but no lorlatinib- resistant clones harboring single ALK mutations. In similar screens with EML4–ALK containing single ALK resistance mutations, numerous lorlatinib-resistant clones emerged harboring compound ALK mutations. To determine the clinical relevance of these mutations, we analyzed repeat biopsies from lorlatinib-resistant patients.