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https://www.readbyqxmd.com/read/29227683/discovery-of-peptidomimetic-antibody-drug-conjugate-linkers-with-enhanced-protease-specificity
#1
Binqing Wei, Janet Gunzner-Toste, Hui Yao, Tao Wang, Jing Wang, Zijin Xu, Jinhua Chen, John Wai, Jim Nonomiya, Siao Ping Tsai, Josefa Dela Cruz-Chuh, Katherine Ruth Kozak, Yichin Liu, Shang-Fan Yu, Jeff Lau, Guangmin Li, Gail D Lewis Phillips, Doug Leipold, Amrita Kamath, Dian Su, Keyang Xu, Charles Eigenbrot, Stefan Steinbacher, Rachana Ohri, Helga Raab, Leanna R Staben, Guiling Zhao, John A Flygare, Thomas H Pillow, Vishal Verma, Brian Salvatore Safina
Antibody-Drug Conjugates (ADCs) have become an important therapeutic modality for oncology, with three approved by the FDA and over 60 others in clinical trials. Despite the progress, improvements in ADC therapeutic index are desired. Peptide-based ADC linkers that are cleaved by lysosomal proteases have shown sufficient stability in serum, and effective payload-release in targeted cells. If the linker can be preferentially hydrolyzed by tumor-specific proteases, safety margin may improve. However, the use of peptide-based linkers limits our ability to modulate protease specificity...
December 11, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29226734/emerging-first-line-treatment-options-for-bladder-cancer-a-review-of-phase-ii-and-iii-therapies-in-the-pipeline
#2
Omer Jamy, Guru Sonpavde
The treatment of urothelial carcinoma (UC) had remained unchanged for several years until the recent FDA approval of immune checkpoint inhibitors (CPIs) in the salvage setting. Novel dual CPI-CPI and CPI-chemotherapy combinations are now being investigated aggressively as first line therapy for metastatic disease. Areas Covered: We discuss the recent insights into the tumor biology of UC, which may impact the prognosis as well as assist in developing precision medicine. This is followed by an overview of existing treatment including conventional chemotherapy as well as the trials that led to the recent approval of PD-1 and PD-L1 inhibitors...
December 10, 2017: Expert Opinion on Emerging Drugs
https://www.readbyqxmd.com/read/29226720/memantine-induces-apoptosis-and-inhibits-cell-cycle-progression-in-lncap-prostate-cancer-cells
#3
G Albayrak, E Konac, A U Dikmen, C Y Bilen
Deregulated cancer cell metabolism plays an important role in cancer progression. Cancer cell metabolism has been in the centre of attention in therapeutical cancer cell targeting. Repurposed chemical agents, such as metformin and aspirin, have been studied extensively as preventive and therapeutic agents. Metformin is Food and Drug administration (FDA)-approved antidiabetic drug cheaper than other chemotherapeutic agents that were shown to have anticancer effects. Memantine is an FDA-approved Alzheimer's drug...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/29225665/evolution-and-clinical-translation-of-drug-delivery-nanomaterials
#4
Shabir Hassan, Gyan Prakash, Aycabal Ozturk, Saghi Saghazadeh, Mohammad Farhan Sohail, Jungmok Seo, Mehmet Dockmeci, Yu Shrike Zhang, Ali Khademhosseini
With the advent of technology, the role of nanomaterials in medicine has grown exponentially in the last few decades. The main advantage of such materials has been exploited in drug delivery applications, due to their effective targeting that in turn reduces systemic toxicity compared to the conventional routes of drug administration. Even though these materials offer broad flexibility based on targeting tissue, disease, and drug payload, the demand for more effective yet highly biocompatible nanomaterial-based drugs is increasing...
August 2017: Nano Today
https://www.readbyqxmd.com/read/29224735/a-novel-three-dimensional-cell-culture-method-enhances-antiviral-drug-screening-in-primary-human-cells
#5
Robert Koban, Markus Neumann, Aila Daugs, Oliver Bloch, Andreas Nitsche, Stefan Langhammer, Heinz Ellerbrok
Gefitinib is a specific inhibitor of the epidermal growth factor receptor (EGFR) and FDA approved for treatment of non-small cell lung cancer. In a previous study we could show the in vitro efficacy of gefitinib for treatment of poxvirus infections in monolayer (2D) cultivated cell lines. Permanent cell lines and 2D cultures, however, are known to be rather unphysiological; therefore it is difficult to predict whether determined effective concentrations or the drug efficacy per se are transferable to the in vivo situation...
December 7, 2017: Antiviral Research
https://www.readbyqxmd.com/read/29223096/discovery-of-aliphatic-chain-hydroxamates-containing-indole-derivatives-with-potent-class-i-histone-deacetylase-inhibitory-activities
#6
Shi-Wei Chao, Liang-Chieh Chen, Chia-Chun Yu, Chang-Yi Liu, Tony Eight Lin, Jih-Hwa Guh, Chen-Yu Wang, Chun-Yung Chen, Kai-Cheng Hsu, Wei-Jan Huang
Histone deacetylase (HDAC) is a validated drug target for various diseases. This study combined indole recognition cap with SAHA, an FDA-approved HDAC inhibitor used to treat cutaneous T-cell lymphoma (CTCL). The structure activity relationship of the resulting compounds that inhibited HDAC was disclosed as well. Some compounds exhibited much stronger inhibitory activities than SAHA. We identified two meta-series compounds 6j and 6k with a two-carbon linker had IC50 values of 3.9 and 4.5 nM for HDAC1, respectively...
December 5, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29222405/multiple-weekly-dalbavancin-dosing-for-the-treatment-of-native-vertebral-osteomyelitis-caused-by-methicillin-resistant-staphylococcus-aureus-a-case-report
#7
Thamer A Almangour, Valerie Fletcher, Mohammed Alessa, Abdullah A Alhifany, Deanne Tabb
BACKGROUND Native vertebral osteomyelitis (NVO) is a common form of hematogenous osteomyelitis, with Staphylococcus aureus (S. aureus) being the most commonly isolated organism. Dalbavancin is approved by the US Food and Drug Administration (FDA) for the treatment of acute bacterial skin and skin structure infections (ABSSSI) and has a sufficiently promising pharmacokinetic and pharmacodynamic profile to be considered for the treatment of vertebral osteomyelitis. We describe here what is probably the first reported case of using multiple weekly dalbavancin to treat a complicated methicillin-resistant Staphylococcus aureus (MRSA) bacteremia and vertebral osteomyelitis...
December 9, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/29221951/role-of-drugs-in-the-prevention-and-amelioration-of-radiation-induced-toxic-effects
#8
REVIEW
Rakesh Raman Patyar, Sazal Patyar
As the use of radiation technology for nuclear warfare or for the benefits of mankind (e.g. in radiotherapy or radio-diagnosis) is increasing tremendously, the risk of associated side effects is becoming a cause of concern. These effects, ranging from nausea/vomiting to death, may result from accidental or deliberate exposure and begin in seconds. Through this review paper, efforts have been done to critically review different compounds which have been investigated as radioprotectors and radiation mitigators...
December 5, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/29219657/the-levels-of-mutant-k-ras-and-mutant-n-ras-are-rapidly-reduced-in-a-beclin1-atg5-dependent-fashion-by-the-irreversible-erbb1-2-4-inhibitor-neratinib
#9
Laurence Booth, Jane L Roberts, Andrew Poklepovic, John Kirkwood, Cindy Sander, Francesca Avogadri-Connors, Richard E Cutler, Alshad S Lalani, Paul Dent
The FDA approved irreversible inhibitor of ERBB1/2/4, neratinib, was recently shown to rapidly down-regulate the expression of ERBB1/2/4 as well as the levels of c-MET and mutant K-RAS via autophagic degradation. In the present studies, in a dose-dependent fashion, neratinib reduced the expression levels of mutant K-RAS or of mutant N-RAS, which was augmented in an additive to greater than additive fashion by the HDAC inhibitors sodium valproate and AR42. Neratinib could reduce PDGFRα levels in GBM cells, that was enhanced by sodium valproate...
December 8, 2017: Cancer Biology & Therapy
https://www.readbyqxmd.com/read/29218872/diffusion-mapping-of-drug-targets-on-disease-signaling-network-elements-reveals-drug-combination-strategies
#10
Jielin Xu, Kelly Regan-Fendt, Siyuan Deng, William E Carson, Philip R O Payne, Fuhai Li
The emergence of drug resistance to traditional chemotherapy and newer targeted therapies in cancer patients is a major clinical challenge. Reactivation of the same or compensatory signaling pathways is a common class of drug resistance mechanisms. Employing drug combinations that inhibit multiple modules of reactivated signaling pathways is a promising strategy to overcome and prevent the onset of drug resistance. However, with thousands of available FDA-approved and investigational compounds, it is infeasible to experimentally screen millions of possible drug combinations with limited resources...
2018: Pacific Symposium on Biocomputing
https://www.readbyqxmd.com/read/29218248/propafenone-suppresses-esophageal-cancer-proliferation-through-inducing-mitochondrial-dysfunction
#11
Wei-Bin Zheng, Yang-Jia Li, Yang Wang, Jie Yang, Can-Can Zheng, Xiao-Hui Huang, Bin Li, Qing-Yu He
Esophageal squamous cell carcinoma (ESCC) is one of the most common malignant tumors with poor survival and limited therapeutic options. The aim of this study is to identify novel anticancer strategies from existing Food and Drug Administration (FDA)-approved drugs that have been used to clinically treat other diseases. Here, propafenone, an antiarrhythmic medication, was found to induce apoptosis and exert a significantly inhibitory effect on the proliferation and colony-forming ability of ESCC cells in a dose-dependent manner without observed cytotoxicity on normal esophageal epithelial cells...
2017: American Journal of Cancer Research
https://www.readbyqxmd.com/read/29217732/peptide-blocking-of-pd-1-pd-l1-interaction-for-cancer-immunotherapy
#12
Chunlin Li, Nengpan Zhang, Jundong Zhou, Chen Ding, Yaqing Jin, Xueyuan Cui, Kefeng Pu, Yimin Zhu
Immunotherapy has become a promising alternative therapeutic approach for cancer patients. Interruption of immune checkpoints, such as CTLA-4 and PD-1, has been verified to be a successful means for cancer therapy in clinical trials. Monoclonal antibody (mAb) targeting to PD-L1 has been approved to treat urothelial carcinoma, non-small cell lung cancer or merkel cell carcinoma by the Food and Drug Administration (FDA). However, the high cost of the antibody can limit its application. In our study, TPP-1 (targeting PD-L1 peptide), which specifically binds to PD-L1 with high affinity, was identified through bacterial surface display methods...
December 7, 2017: Cancer Immunology Research
https://www.readbyqxmd.com/read/29217527/merkel-cell-carcinoma-in-the-age-of-immunotherapy-facts-and%C3%A2-hopes
#13
Aric Colunga, Thomas Pulliam, Paul Nghiem
Merkel cell carcinoma (MCC) is a rare (~2,000 US cases/year) but aggressive neuroendocrine tumor of the skin. For advanced MCC, cytotoxic chemotherapy only infrequently (<10% of cases) offers durable clinical responses (>1 year) suggesting a great need for improved therapeutic options. In 2008, the Merkel cell polyomavirus (MCPyV) was discovered and is clonally integrated in ~80% of MCC tumors. The remaining 20% of MCC tumors have large numbers of UV-associated mutations. Importantly, both the UV-induced-neoantigens in virus-negative tumors and the MCPyV T antigen oncogenes that are required for virus-positive tumor growth are immunogenic...
December 7, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29217288/avelumab-in-metastatic-urothelial-carcinoma-after-platinum-failure-javelin-solid-tumor-pooled-results-from-two-expansion-cohorts-of-an-open-label-phase-1-trial
#14
Manish R Patel, John Ellerton, Jeffrey R Infante, Manish Agrawal, Michael Gordon, Raid Aljumaily, Carolyn D Britten, Luc Dirix, Keun-Wook Lee, Mathew Taylor, Patrick Schöffski, Ding Wang, Alain Ravaud, Arnold B Gelb, Junyuan Xiong, Galit Rosen, James L Gulley, Andrea B Apolo
BACKGROUND: The approval of anti-programmed death ligand 1 (PD-L1) and anti-programmed death 1 agents has expanded treatment options for patients with locally advanced or metastatic urothelial carcinoma. Avelumab, a human monoclonal anti-PD-L1 antibody, has shown promising antitumour activity and safety in this disease. We aimed to assess the safety profile in patients (both post-platinum therapy and cisplatin-naive) treated with avelumab and to assess antitumour activity of this drug in post-platinum patients...
December 4, 2017: Lancet Oncology
https://www.readbyqxmd.com/read/29216806/an-industry-update-the-latest-developments-in-therapeutic-delivery
#15
Iain Simpson
This industry update covers the period from 1 September through 30 September 2017, and is based on information sourced from company press releases, scientific literature, patents and various news websites. The month saw the US FDA approve three new molecular entities, Aliqopa (copanlisib dihydrochloride) (Bayer Healthcare); Solosec (secnidazole) (Symbiomix Therapeutics) and Verzenio (abemaciclib) (Eli Lilly and Co). Intarcia Therapeutics Inc. has its application for approval of a novel drug device combination of exenatide for the treatment of diabetes rejected by FDA but said that it will work to address the concerns and refile the application...
January 2018: Therapeutic Delivery
https://www.readbyqxmd.com/read/29215916/new-and-incremental-fda-black-box-warnings-from-2008-to-2015
#16
Michael T Solotke, Sanket S Dhruva, Nicholas S Downing, Nilay D Shah, Joseph S Ross
BACKGROUND: The boxed warning (also known as "black box warning [BBW]") is one of the strongest drug safety actions that the U.S. Food & Drug Administration (FDA) can implement, and often warns of serious risks. The objective of this study was to comprehensively characterize BBWs issued for drugs after FDA approval. METHODS: We identified all post-marketing BBWs from January 2008 through June 2015 listed on FDA's MedWatch and Drug Safety Communications websites...
December 7, 2017: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/29215386/improving-the-clinical-pharmacologic-assessment-of-abuse-potential-part-1-regulatory-context-and-risk-management
#17
Edward M Sellers
PURPOSE: This article brings to the attention of drug developers the Food and Drug Administration's (FDA's) recent final Guidance to Industry on Assessment of Abuse Potential and provides practical suggestions about compliance with the Guidance. PROCEDURES: The Guidance areas are reviewed, analyzed, and placed in the context of current scientific knowledge and best practices to mitigate regulatory risk. FINDINGS: The Guidance provides substantial new detail on what needs to be done at all stages of drug development for central nervous system-active drugs...
December 6, 2017: Journal of Clinical Psychopharmacology
https://www.readbyqxmd.com/read/29214573/post-approval-studies-for-rare-disease-treatments-and-orphan-drugs
#18
William C Maier, Ronald A Christensen, Patricia Anderson
Drug development involves a multi-stage process of drug discovery, animal studies and human clinical trials to assess the safety and efficacy of new medications. Rare disease drug development involves a much smaller number of affected patients, a predominance of pediatric patients and more complicated disease presentation. Post-approval studies are designed to address several limitations associated with the rare disease clinical trials.National and international regulatory agencies in the US and Europe have adopted similar approaches to requirements post-approval data for rare diseases and orphan drug indications...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29214032/new-therapies-for-advanced-recurrent-and-metastatic-endometrial-cancers
#19
REVIEW
Vicky Makker, Angela K Green, Robert M Wenham, David Mutch, Brittany Davidson, David Scott Miller
Endometrial cancer is the most common gynecologic malignancy in the United States, accounting for 6% of cancers in women. In 2017, an estimated 61,380 women were diagnosed with endometrial cancer, and approximately 11,000 died from this disease. From 1987 to 2008, there was a 50% increase in the incidence of endometrial cancer, with an approximate 300% increase in the number of associated deaths. Although there are many chemotherapeutic and targeted therapy agents approved for ovarian, fallopian tube and primary peritoneal cancers, since the 1971 approval of megestrol acetate for the palliative treatment of advanced endometrial cancer, only pembrolizumab has been Food and Drug Administration (FDA)-approved for high microsatellite instability (MSI-H) or mismatch repair deficient (dMMR) endometrial cancer; this highlights the need for new therapies to treat advanced, recurrent, metastatic endometrial cancer...
2017: Gynecologic Oncology Research and Practice
https://www.readbyqxmd.com/read/29214031/parp-inhibitors-as-potential-therapeutic-agents-for-various-cancers-focus-on-niraparib-and-its-first-global-approval-for-maintenance-therapy-of-gynecologic-cancers
#20
REVIEW
Mekonnen Sisay, Dumessa Edessa
Poly (ADP-ribose) polymerases (PARPs) are an important family of nucleoproteins highly implicated in DNA damage repair. Among the PARP families, the most studied are PARP1, PARP2 and PARP 3. PARP1 is found to be the most abundant nuclear enzyme under the PARP series. These enzymes are primarily involved in base excision repair as one of the major single strand break (SSB) repair mechanisms. Being double stranded, DNA engages itself in reparation of a sub-lethal SSB with the aid of PARP. Moreover, by having a sister chromatid, DNA can also repair double strand breaks with either error-free homologous recombination or error-prone non-homologous end-joining...
2017: Gynecologic Oncology Research and Practice
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