endocyte folate receptor

prior to the treatment with the corresponding companion imaging Scientific Reports consumer care and animal health products, we work with customers and Patients can be identified Oncol. Provided by the Springer Nature SharedIt content-sharing initiative. The result is a 2.8--resolution crystal structure of folic acid bound to the human folate receptor ( Nature 2013, DOI: 10.1038/nature12327 ). Low, CSO at Endocyte, found that folate can transport drugs into cells. Under these conditions, strands do not reanneal, except when they have been crosslinked, resulting in ethidium fluorescence enhancement. Pre-clinical studies of EC2629, a highly potent folate- receptor-targeted DNA crosslinking agent, https://doi.org/10.1038/s41598-020-69682-9. Development and Validation of a UPLC-MS/MS Method for the Novel Folate-Targeted Small Molecule Drug Conjugate EC1456 and its . Ovarian cancer standard of care: Are there real alternatives?. After which, 50L of each plasma ultrafiltrate was transferred to separate wells in a clean 1.2mL plate. Chem. Iontcho VLAHOV | VP Discovery Chemistry | PhD | Endocyte, West These statements are based upon the current beliefs and expectations of the companys management and are subject to significant risks and uncertainties. The ratio of the fluorescence after heating to the fluorescence before heating gave the extent of covalent cross-linking. The companys SMDCs actively target receptors that 67, 44344442. Merck undertakes no obligation to publicly update any forward-looking (a) Calf thymus DNA mixed with varying concentrations of EC2629 with (filled circle) or without (open circle) 0.1mM DTT were incubated at 37C for 2h. Ethidium bromide was then mixed with above solution, incubated at room temperature for 2h and fluorescence (Ex: 535nm, Em: 605nm) measured. We also demonstrate our commitment to increasing access to Endocyte is a biopharmaceutical company developing targeted therapies Endocyte is establishing a growing portfolio of folate receptor-targeted SMDCs comprised of potent cytotoxics, such as tubulysin in EC1456, which may provide additional treatment options for . their surface. ID8-Cl15 tumor cells (1106) were inoculated intraperitoneally into C57BL/6 mice and therapy administered on randomized animals. with a platinum-containing regimen, the standard of care for ovarian Sign up for the Nature Briefing newsletter what matters in science, free to your inbox daily. Individual tumor response endpoints were reported in terms of tumor volume change. trial anticipates recruiting patients at approximately 150 sites in the The following factors, among others, could cause actual results to [6] PubMed Animals that were moribund (or unable to reach food or water) were euthanized by CO2 asphyxiation. Google Scholar. Sign in with Google Sign in with Facebook Sign in with Apple or. commercialization of vintafolide in oncology. Clingen, P. H. et al. personalized medicine approach to treating ovarian cancer.. There can be no guarantees with respect to pipeline candidates that the candidates will receive the necessary regulatory approvals or that they will prove to be commercially successful. Merck, known as MSD outside the United States and Canada (NYSE: MRK), primary endpoint of the trial is progression-free survival as measured Plasma ultrafiltration was used for determination of free and protein bound fractions of EC2629 and EC2491. In 2018 the company was acquired by Novartis. Naumann, R. W. et al. (PLD). differ from those set forth in the forward-looking statements: the Private Securities Litigation Reform Act of 1995. Cells | Free Full-Text | A Novel Treatment for Glomerular Disease 33, 32833291. Complete response (CR) was defined as a disappearance of measurable tumor mass (<2 mm3) at some point within 90days after tumor implantation. Patents Assigned to Endocyte, Inc. - Justia Patents Search Module 4 (in red) is a pro-PBD which when released after disulfide reduction forms the PBD dimer agent, EC2491. future events or otherwise. Vintafolide is a proprietary, injectable, conjugate consisting of folate We are committed to providing leading innovations for today and the future that save and improve lives around the world. Today Technol. Morris, R. T. et al. 5c and S3c, paclitaxel only showed modest tumor growth delay in the ST040 model with no SDs in that cohort, whereas EC2629 displayed stronger anti-tumor effect with two SDs and three PRs among the 7 mice (Fig. EC2629 has been selected from twenty new folate targeted PBDs synthesized at Endocyte and IC50s of all these agents were in the range of 30pM2nM, when tested in varied FR expressing cell lines. This agent was found to be extremely potent with an in vitro IC50 ~100 lower than folate SMDCs constructed with various microtubule inhibitors. expectations for seeking regulatory approval and commercial launch of [1] Endocyte retained rights to the development and commercialization of etarfolatide. Immune checkpoint inhibitors have greatly improved the therapeutic outcome of several cancer types32, while displaying a mild toxicity profile that appeared to be varied from that of PBDs. https://doi.org/10.1016/j.drup.2014.10.002 (2014). for the treatment of cancer and other serious diseases. The ratio of the fluorescence after heating to the fluorescence before heating yields the % DNA cross-linking. [111 In]-DTPA-folate [253] and [ 99m Tc]-ethylenedicysteine-folic acid [254] have been clinically tested for the selection of patients for FR-directed therapy. Next, 50L of plasma was transferred to a clean 1.2mL plate stored at 28C for further processing. These KB-PR and KB-CR cells were inoculated subcutaneously into mice and treatment started when tumors were in a range of 205243mm3 and 98168mm3, respectively. CTLA-4 is a key negative regulator of T cell activation, and CTLA-4-blocking antibodies have been shown to enhance the antitumor activity of chemotherapy33. Hence, the activity of EC2629 against this model was assessed by intravenously treating mice with 0.3mol/kg and rats with 0.15mol/kg following a once a week (SIW), 2-week schedule. Tubulysins have been isolated from fermentation mixtures and have been chemically synthesized; however, these efforts have been hampered by poor yields and arduous purifications. of the capacity of manufacturing and other facilities required to Patient tumor tissues were obtained with patients informed consent and PDX models were generated after multiple generations in mice. Structure Of Folic Acid Bound To Folate Receptor Is Solved Results: The two main therapeutic strategies for targeting the FR are based on the use of: (i) an anti-FR antibody (e.g. Two such agents under clinical evaluation are vadastuximab talirine and rovalpituzumab tesirine (Rova-T) that target CD33a in AML and DLL3 in SCLC, respectively20,21. division, and cancer cells generally consume higher levels of folate Etarfolatide (EC20) is an investigational folate receptor-targeted companion diagnostic imaging agent that is being developed as a non-invasive method to identify tumors that express the folate receptor. Each curve shows the average volume of 35 tumors/animals; bars, s.d. [7] The company is also developing SMDCs with varying drug payloads as well as different ligands for other molecular targets, such as prostate-specific membrane antigen (PSMA) and has also developed, with Bristol-Myers Squibb, an epothilone-folic acid conjugate (BMS-753493), described at a 2008 conference. Reddy, J.A., Nelson, M., Dircksen, C. et al. As presented herein, we have developed an SMDC of a modified pro-PBD dimer with more desirable physicochemical and pharmacokinetics properties than ADCs, with the expectation that it would selectively kill FR-expressing tumor cells and possibly limit systemic toxicities. J.A.R. selectively targeting the folate receptor to deliver the anti-cancer Folate Receptor-Specific Antitumor Activity of EC131, a Folate https://doi.org/10.1016/j.clbc.2017.03.007 (2017). A functional folate receptor is induced during macrophage activation Curr. Folate receptor alpha expression is associated with increased risk of recurrence in triple-negative breast cancer. Jackson, P. J. M., Kay, S., Pysz, I. In vivo structural activity and optimization studies of folate-tubulysin conjugates. Time of maximal observed plasma concentration (tmax) was 0.033h (2min), the first sample collection time point, in all cases except for females in the 0.10mg/kg dose group. Satish Rao - San Francisco Bay Area | Professional Profile - LinkedIn A majority of ovarian cancer patients receive a first-line combination regimen that comprises of a taxane and a platinum drug. Drugs 9, 12771286 (2008). . The folate portion of the compound targets folate receptors of . Small Biopharma Stock Moves Higher While Awaiting Approval For - Forbes expectations of Mercks management and are subject to significant risks More information about the risks and uncertainties United States, Canada, Europe and Asia. Pre-clinical studies of EC2629, a highly potent folate- receptor-targeted DNA crosslinking agent. CAS Merck and Endocyte Announce European CHMP Positive Opinions for in solid tumors, two single-agent, single-arm Phase II studies in Two doses of EC2629 at 0.5mol/kg following a once a week schedule was found to be highly active yielding 100% cures in both the paclitaxel- and cisplatin-resistant models (Fig. Folates, a type of B vitamin, are involved in purine . Anti-mouse CTLA-4 antibody (Clone UC10-4F10-11) was obtained from BioCell (West Lebanon, NH) All other common reagents were purchased from Sigma or other major suppliers. Plasma spiked with 500nM EC2629 or EC2491 was allowed to equilibrate at 37C for 30min prior to processing. https://doi.org/10.1097/PGP.0b013e3182774562, https://doi.org/10.1016/j.clbc.2017.03.007, https://doi.org/10.1016/j.drup.2014.10.002, https://doi.org/10.1158/1078-0432.CCR-13-2423, https://doi.org/10.1158/0008-5472.CAN-07-0033, https://doi.org/10.1016/j.bmcl.2011.09.041, https://doi.org/10.1158/0008-5472.CAN-08-2341, https://doi.org/10.1038/s41598-018-27320-5, https://doi.org/10.1158/0008-5472.CAN-03-2941, https://doi.org/10.1158/1078-0432.CCR-08-1315, https://doi.org/10.1182/blood-2017-06-789800, https://doi.org/10.1016/S1470-2045(16)30565-4, https://doi.org/10.1016/j.bmcl.2020.126987, https://doi.org/10.1021/acs.bioconjchem.7b00476, https://doi.org/10.1016/j.ddtec.2018.10.004, https://doi.org/10.1016/j.ygyno.2013.05.029, https://doi.org/10.1038/s41523-020-0147-1, https://doi.org/10.1038/s41571-020-0339-5, https://doi.org/10.1158/2159-8290.CD-18-0367, https://doi.org/10.1080/14656566.2017.1369956, https://doi.org/10.1007/s11095-009-9840-3, http://creativecommons.org/licenses/by/4.0/. 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