TAK-683 TFA 

TAK-683 TFA is a potent full KISS1 receptor (KISS1R) agonist (IC₅₀=170 pM) with improved metabolic stability. TAK-683 TFA is a nonapeptide metastin analog, exhibits agonistic activities to KISS1R with EC₅₀ values of 0.96 nM and 1.6 nM for human and rat, respectively^[1]. TAK-683 TFA depletes GnRH in the hypothalamus and reduces plasma FSH, LH, and testosterone levels in vivo, it has the potential for the study of hormone-dependent prostate cancer^[1][2][3].

IC50: 170 pM (metastin/GPR54)^[1]

TAK-683 (subcutaneous injection; 0.008, 0.08, 0.8, or 8 μmol/ml/kg; once daily; 7 days) induces an increase in plasma luteinizing hormone and testosterone levels; however, after day 7, plasma hormone levels and genital organ weights are reduced^[1].
TAK-683 (subcutaneous injection; 10, 30, or 100 pmol/h; once daily; 4 weeks) provides a promising for suppressing reproductive functions and hormone-related diseases such as prostate cancer^[1].
TAK-683 (subcutaneous injection; 2.1-21 nmol/kg/day; once daily; 12 weeks) has a longer-term evaluation in prostate cancer model, serum concentrations of PSA is reduced in rats, PSA concentrations are reduced to below the limit of detection (0.5 ng/ml)) in all rats by day 14^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

1412.47

C₆₆H₈₄F₃N₁₇O₁₅

N-Acetyl-{d-Tyr}-{d-Trp}-Asn-Thr-Phe-{aza}-Leu-{Met}-Arg-Trp-NH2

N-Acetyl--{d-Tyr}-{d-Trp}-NTF-{aza}-L-{Met}-RW-NH2

Room temperature in continental US; may vary elsewhere.

Please store the product under the recommended conditions in the Certificate of Analysis.

• [1]. Tanaka A, et al. Evaluation of pharmacokinetics/pharmacodynamics and efficacy of one-month depots of TAK-448 and TAK-683, investigational kisspeptin analogs, in male rats and an androgen-dependent prostate cancer model.Eur J Pharmacol. 2018 Mar 5;822:138-146.  [Content Brief]

  [2]. Asami T, et al.Design, synthesis, and biological evaluation of novel investigational nonapeptide KISS1R agonists with testosterone-suppressive activity.J Med Chem. 2013 Nov 14;56(21):8298-307.  [Content Brief]

  [3]. Nishizawa N, et al. Design and Synthesis of an Investigational Nonapeptide KISS1 Receptor (KISS1R) Agonist, Ac-d-Tyr-Hydroxyproline (Hyp)-Asn-Thr-Phe-azaGly-Leu-Arg(Me)-Trp-NH2 (TAK-448), with Highly Potent Testosterone-Suppressive Activity and Excellent Water Solubility. J Med Chem. 2016 Oct 13;59(19):8804-8811. Epub 2016 Sep 21.  [Content Brief]

  [4]. Matsui H, et al. Pharmacologic profiles of investigational kisspeptin/metastin analogues, TAK-448 and TAK-683, in adult male rats in comparison to the GnRH analogue leuprolide.Eur J Pharmacol. 2014 Jul 15;735:77-85.  [Content Brief]