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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. -
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. -
Re-Visiting Hypersensitivity Reactions to Taxanes: a Comprehensive Review
Clinic Rev Allerg Immunol DOI 10.1007/s12016-014-8416-0 Re-visiting Hypersensitivity Reactions to Taxanes: A Comprehensive Review Matthieu Picard & Mariana C. Castells # Springer Science+Business Media New York 2014 Abstract Taxanes (a class of chemotherapeutic agents) Keywords Taxane . Paclitaxel . Taxol . Docetaxel . are an important cause of hypersensitivity reactions Taxotere . Nab-paclitaxel . Abraxane . Cabazitaxel . (HSRs) in cancer patients. During the last decade, the Chemotherapy . Hypersensitivity . Allergy . Skin test . development of rapid drug desensitization has been key Desensitization . Challenge . Diagnosis . Review . IgE . to allow patients with HSRs to taxanes to be safely re- Complement . Mechanism treated although the mechanisms of these HSRs are not fully understood. Earlier studies suggested that solvents, such as Cremophor EL used to solubilize paclitaxel, Introduction were responsible for HSRs through complement activa- tion, but recent findings have raised the possibility that Hypersensitivity reactions (HSRs) to chemotherapy are in- some of these HSRs are IgE-mediated. Taxane skin creasingly common and represent an important impediment testing, which identifies patients with an IgE-mediated to the care of cancer patients as they may entail serious sensitivity, appears as a promising diagnostic and risk consequences and prevent patients from being treated with stratification tool in the management of patients with the most efficacious agent against their cancer [1]. During the HSRs to taxanes. The management of patients following last decade, different groups have developed rapid drug de- a HSR involves risk stratification and re-exposure could sensitization (RDD) protocols that allow the safe re- be performed either through rapid drug desensitization introduction of a chemotherapeutic agent to which a patient or graded challenge based on the severity of the initial is allergic, and their use have recently been endorsed by the HSR and the skin test result. -
Jevtana® (Cabazitaxel)
AUSTRALIAN PRODUCT INFORMATION – JEVTANA® (CABAZITAXEL) 1 NAME OF THE MEDICINE Cabazitaxel 2 QUALITATIVE AND QUANTITATIVE COMPOSITION The concentrated solution for injection contains 60 mg cabazitaxel in 1.5 mL polysorbate 80. Diluent contains 13% w/w ethanol in 4.5 mL water for injections. Excipients of known effect: Diluent contains 13% w/w ethanol. For the full list of excipients, see Section 6.1 List of excipients. 3 PHARMACEUTICAL FORM The concentrated solution for injection is a clear oily yellow to brownish yellow solution. The diluent is a clear, colourless solution. 4 CLINICAL PARTICULARS 4.1 THERAPEUTIC INDICATIONS Jevtana in combination with prednisone or prednisolone is indicated for the treatment of patients with metastatic castration resistant prostate cancer previously treated with a docetaxel containing regimen. 4.2 DOSE AND METHOD OF ADMINISTRATION The use of Jevtana should be confined to units specialised in the administration of cytotoxics and it should only be administered under the supervision of a physician experienced in the use of anticancer chemotherapy. Premedication Premedicate at least 30 minutes prior to each administration of Jevtana with the following intravenous medications to reduce the risk and severity of a hypersensitivity reaction: jevtana-ccdsv10-piv11-10nov20 Page 1 of 26 antihistamine (equivalent to dexchlorpheniramine 5 mg or diphenhydramine 25 mg or equivalent), corticosteroid (dexamethasone 8 mg or equivalent) and with H2 antagonist (ranitidine or equivalent). Antiemetic prophylaxis is recommended and can be given orally or intravenously as needed (see Section 4.4 Special warnings and precautions for use). Recommended Dosage The recommended dose of Jevtana is 20 mg/m2 administered as a 1-hour intravenous infusion every 3 weeks in combination with oral prednisone (or prednisolone) 10 mg administered daily throughout Jevtana treatment. -
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. -
BC Cancer Benefit Drug List September 2021
Page 1 of 65 BC Cancer Benefit Drug List September 2021 DEFINITIONS Class I Reimbursed for active cancer or approved treatment or approved indication only. Reimbursed for approved indications only. Completion of the BC Cancer Compassionate Access Program Application (formerly Undesignated Indication Form) is necessary to Restricted Funding (R) provide the appropriate clinical information for each patient. NOTES 1. BC Cancer will reimburse, to the Communities Oncology Network hospital pharmacy, the actual acquisition cost of a Benefit Drug, up to the maximum price as determined by BC Cancer, based on the current brand and contract price. Please contact the OSCAR Hotline at 1-888-355-0355 if more information is required. 2. Not Otherwise Specified (NOS) code only applicable to Class I drugs where indicated. 3. Intrahepatic use of chemotherapy drugs is not reimbursable unless specified. 4. For queries regarding other indications not specified, please contact the BC Cancer Compassionate Access Program Office at 604.877.6000 x 6277 or [email protected] DOSAGE TUMOUR PROTOCOL DRUG APPROVED INDICATIONS CLASS NOTES FORM SITE CODES Therapy for Metastatic Castration-Sensitive Prostate Cancer using abiraterone tablet Genitourinary UGUMCSPABI* R Abiraterone and Prednisone Palliative Therapy for Metastatic Castration Resistant Prostate Cancer abiraterone tablet Genitourinary UGUPABI R Using Abiraterone and prednisone acitretin capsule Lymphoma reversal of early dysplastic and neoplastic stem changes LYNOS I first-line treatment of epidermal -
Pharmacogenomic Biomarkers in Docetaxel Treatment of Prostate Cancer: from Discovery to Implementation
G C A T T A C G G C A T genes Review Pharmacogenomic Biomarkers in Docetaxel Treatment of Prostate Cancer: From Discovery to Implementation Reka Varnai 1,2, Leena M. Koskinen 3, Laura E. Mäntylä 3, Istvan Szabo 4,5, Liesel M. FitzGerald 6 and Csilla Sipeky 3,* 1 Department of Primary Health Care, University of Pécs, Rákóczi u 2, H-7623 Pécs, Hungary 2 Faculty of Health Sciences, Doctoral School of Health Sciences, University of Pécs, Vörösmarty u 4, H-7621 Pécs, Hungary 3 Institute of Biomedicine, University of Turku, Kiinamyllynkatu 10, FI-20520 Turku, Finland 4 Institute of Sport Sciences and Physical Education, University of Pécs, Ifjúság útja 6, H-7624 Pécs, Hungary 5 Faculty of Sciences, Doctoral School of Biology and Sportbiology, University of Pécs, Ifjúság útja 6, H-7624 Pécs, Hungary 6 Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania 7000, Australia * Correspondence: csilla.sipeky@utu.fi Received: 17 June 2019; Accepted: 5 August 2019; Published: 8 August 2019 Abstract: Prostate cancer is the fifth leading cause of male cancer death worldwide. Although docetaxel chemotherapy has been used for more than fifteen years to treat metastatic castration resistant prostate cancer, the high inter-individual variability of treatment efficacy and toxicity is still not well understood. Since prostate cancer has a high heritability, inherited biomarkers of the genomic signature may be appropriate tools to guide treatment. In this review, we provide an extensive overview and discuss the current state of the art of pharmacogenomic biomarkers modulating docetaxel treatment of prostate cancer. This includes (1) research studies with a focus on germline genomic biomarkers, (2) clinical trials including a range of genetic signatures, and (3) their implementation in treatment guidelines. -
Psma-1-Doxorubicin Conjugates for Targeted Therapy of Prostate Cancer
PSMA-1-DOXORUBICIN CONJUGATES FOR TARGETED THERAPY OF PROSTATE CANCER by NATALIE WALKER Submitted in partial fulfillment of the requirements for the degree of Master of Science Biomedical Engineering CASE WESTERN RESERVE UNIVERSITY May, 2019 CASE WESTERN RESERVE UNIVERSITY SCHOOL OF GRADUATE STUDIES We hereby approve the thesis of Natalie Walker candidate for the degree of Master of Science. Committee Chair Efstathios Karathanasis, PhD Committee Members James Basilion, PhD, Research Advisor Christopher Hoimes, DO Xinning Wang, PhD Date of Defense 14 January 2019 *We also certify that written approval has been obtained for any proprietary material contained therin. Contents List of Tables ..................................................................................................................... iv List of Figures ..................................................................................................................... v Abstract ............................................................................................................................... 1 Introduction ......................................................................................................................... 2 Table 1: Review of PSMA Expression in Nonprostate Malignancies. ................... 5 Figure 1: Outline of Structures of Three PSMA-1-Doxorubicin Prodrug Conjugates............................................................................................................... 8 Figure 2: Proposed Mechanism for Prodrug Release of -
TALZENNA (Talazoparib) RATIONALE for INCLUSION in PA PROGRAM
TALZENNA (talazoparib) RATIONALE FOR INCLUSION IN PA PROGRAM Background Talzenna (talazoparib) is an inhibitor of poly (ADP-ribose) polymerase (PARP) enzymes, including PARP1 and PARP2 which play a role in DNA repair. Talazoparib-induced cytotoxicity may involve inhibition of PARP enzymatic activity and increased formation of PARP-DNA complexes resulting in DNA damage, decreased cell proliferation, and apoptosis. Talazoparib anti-tumor activity was observed in human patient-derived xenograft breast cancer tumor models that expressed mutated or wild-type BRCA 1 and 2 (1). Regulatory Status FDA-approved indication: Talzenna is a poly (ADP-ribose) polymerase (PARP) inhibitor indicated for the treatment of adult patients with deleterious or suspected deleterious germline BRCA- mutated (gBRCAm) HER2-negative locally advanced or metastatic breast cancer. Select patients based on an FDA-approved companion diagnostic for Talzenna (1). Myelodysplastic Syndrome/Acute Myeloid Leukemia (MDS/AML) can occur in patients treated with Talzenna. Talzenna should not be started until patients have adequately recovered from hematological toxicity caused by previous chemotherapy. Complete blood counts should be monitored for cytopenia at baseline and monthly thereafter. If MDS/AML is confirmed, Talzenna should be discontinued (1). Talzenna can also cause myelosuppression, consisting of anemia, leukopenia/neutropenia, and/or thrombocytopenia. Talzenna should not be started until patients have adequately recovered from hematological toxicity caused by previous chemotherapy (1). Talzenna can cause fetal harm when administered to a pregnant woman. Females of reproductive potential should be advised to use effective contraception during treatment and for at least 7 months following the last dose of Talzenna. Male patients with female partners of reproductive potential or who are pregnant should be advised to use effective contraception during treatment and for at least 4 months following the last dose of Talzenna (1). -
PFIZER INC. (Exact Name of Registrant As Specified in Its Charter)
UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 1-3619 PFIZER INC. (Exact name of registrant as specified in its charter) Delaware 13-5315170 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification Number) 235 East 42nd Street, New York, New York 10017 (Address of principal executive offices) (zip code) (212) 733-2323 (Registrant’s telephone number, including area code) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $.05 par value PFE New York Stock Exchange 0.000% Notes due 2020 PFE20A New York Stock Exchange 0.250% Notes due 2022 PFE22 New York Stock Exchange 1.000% Notes due 2027 PFE27 New York Stock Exchange Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes ☒ No ☐ Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ☐ No ☒ Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.