# Every Claim Needs a Return Address

> Reference Register — Peptide Evidence Dispatch — The source register for this Research Peptide Fundamentals research peptides digest, including primary studies, reviews, and regulatory documents.

**SOURCE REGISTER / 22 RECORDS**

The complete composed source register for KPV, retatrutide, NAD+, and PT-141, retained in citation order.

## How to use the register

Numbered brackets throughout the Dispatch point to the entries below. The list includes primary laboratory and clinical studies, reviews, and a regulatory prescribing document. Source type should be checked alongside title and journal: a review offers synthesis, a primary study reports original observations, and a label defines official use and warnings. The register is arranged by compound—KPV, retatrutide, NAD+, then PT-141—and each record appears once.

## References

[1] Zhang D, et al. PepT1-targeted nanodrug based on co-assembly of anti-inflammatory peptide and immunosuppressant for combination treatment of acute and chronic DSS-induced colitis. Front Pharmacol. 2024;15:1442876. https://pubmed.ncbi.nlm.nih.gov/39211778/
[2] Xiao B, Xu Z, Viennois E, et al. Orally Targeted Delivery of Tripeptide KPV via Hyaluronic Acid-Functionalized Nanoparticles Efficiently Alleviates Ulcerative Colitis. Mol Ther. 2017;25(7):1628-1640. https://pubmed.ncbi.nlm.nih.gov/28143741/
[3] Dalmasso G, Charrier-Hisamuddin L, Nguyen HT, Yan Y, Sitaraman S, Merlin D. PepT1-mediated tripeptide KPV uptake reduces intestinal inflammation. Gastroenterology. 2008;134(1):166-178. https://pubmed.ncbi.nlm.nih.gov/18061177/
[4] Kannengiesser K, Maaser C, Heidemann J, et al. Melanocortin-derived tripeptide KPV has anti-inflammatory potential in murine models of inflammatory bowel disease. Inflamm Bowel Dis. 2008;14(3):324-331. https://pubmed.ncbi.nlm.nih.gov/18092346/
[5] Brzoska T, Luger TA, Maaser C, Abels C, Bohm M. Alpha-melanocyte-stimulating hormone and related tripeptides: biochemistry, antiinflammatory and protective effects in vitro and in vivo, and future perspectives for the treatment of immune-mediated inflammatory diseases. Endocr Rev. 2008;29(5):581-602. https://pubmed.ncbi.nlm.nih.gov/18612139/
[6] Bonfiglio V, Camillieri G, Avitabile T, Leggio GM, Drago F. Effects of the COOH-terminal tripeptide alpha-MSH(11-13) on corneal epithelial wound healing: role of nitric oxide. Exp Eye Res. 2006;83(6):1366-1372. https://pubmed.ncbi.nlm.nih.gov/16965771/
[7] Getting SJ, Schiöth HB, Perretti M. Dissection of the anti-inflammatory effect of the core and C-terminal (KPV) alpha-melanocyte-stimulating hormone peptides. J Pharmacol Exp Ther. 2003;306(2):631-637. https://pubmed.ncbi.nlm.nih.gov/12750433/
[8] Katsi V, Koutsopoulos G, Fragoulis C, Dimitriadis K, Tsioufis K. Retatrutide-A Game Changer in Obesity Pharmacotherapy. Biomolecules. 2025;15:796. https://pmc.ncbi.nlm.nih.gov/articles/PMC12190491/
[9] Li W, Zhou Q, Cong Z, Yuan Q, Li W, Zhao F, Xu HE, Zhao LH, Yang D, Wang MW. Structural insights into the triple agonism at GLP-1R, GIPR and GCGR manifested by retatrutide. Cell Discovery. 2024;10:77. https://pmc.ncbi.nlm.nih.gov/articles/PMC11255275/
[10] Sanyal AJ, Kaplan LM, Frias JP, Brouwers B, Wu Q, Thomas MK, Harris C, Schloot NC, Du Y, Mather KJ, Haupt A, Hartman ML. Triple hormone receptor agonist retatrutide for metabolic dysfunction-associated steatotic liver disease: a randomized phase 2a trial. Nature Medicine. 2024;30:2037-2048. https://pmc.ncbi.nlm.nih.gov/articles/PMC11271400/
[11] Jastreboff AM, et al. Triple-Hormone-Receptor Agonist Retatrutide for Obesity - A Phase 2 Trial. N Engl J Med. 2023;389(6):514-526. https://pubmed.ncbi.nlm.nih.gov/37366315/
[12] Rosenstock J, et al. Retatrutide, a GIP, GLP-1 and glucagon receptor agonist, for people with type 2 diabetes: a randomised, double-blind, placebo and active-controlled, parallel-group, phase 2 trial. Lancet. 2023;402(10401):529-544. https://pubmed.ncbi.nlm.nih.gov/37385280/
[13] Vinten KT, Trętowicz MM, Coskun E, van Weeghel M, Cantó C, Zapata-Pérez R, Janssens GE, Houtkooper RH. NAD(+) precursor supplementation in human ageing: clinical evidence and challenges. Nat Metab. 2025;7:1974-1990. https://pubmed.ncbi.nlm.nih.gov/41083806/
[14] Yi L, Maier AB, Tao R, Lin Z, Vaidya A, Pendse S, Thasma S, Andhalkar N, Avhad G, Kumbhar V. The efficacy and safety of β-nicotinamide mononucleotide (NMN) supplementation in healthy middle-aged adults: a randomized, multicenter, double-blind, placebo-controlled, parallel-group, dose-dependent clinical trial. GeroScience 2023. 2023;45:29-43. https://pubmed.ncbi.nlm.nih.gov/36482258/
[15] Yoshino M, Yoshino J, Kayser BD, Patti GJ, Franczyk MP, Mills KF, Sindelar M, Pietka T, Patterson BW, Imai SI, Klein S. Nicotinamide mononucleotide increases muscle insulin sensitivity in prediabetic women. Science. 2021;372:1224-1229. https://pubmed.ncbi.nlm.nih.gov/33888596/
[16] Covarrubias AJ, et al. NAD+ metabolism and its roles in cellular processes during ageing. Nat Rev Mol Cell Biol. 2021. https://pubmed.ncbi.nlm.nih.gov/33353981/
[17] Conze D, Brenner C, Kruger CL. Safety and Metabolism of Long-term Administration of NIAGEN (Nicotinamide Riboside Chloride) in a Randomized, Double-Blind, Placebo-controlled Clinical Trial of Healthy Overweight Adults. Sci Rep. 2019;9:9772. https://pubmed.ncbi.nlm.nih.gov/31278280/
[18] Borland JM, Kohut-Jackson AL, Peyla AC, Hall MA, Mermelstein PG, Meisel RL. Female Syrian hamster analyses of bremelanotide, a US FDA approved drug for the treatment of female hypoactive sexual desire disorder. Neuropharmacology. 2025;267:110299. https://pubmed.ncbi.nlm.nih.gov/39793696/
[19] Thurston L, Hunjan T, Mills EG, Wall MB, Ertl N, Phylactou M, Muzi B, Patel B, Alexander EC, Suladze S, Modi M, Eng PC, Bassett PA, Abbara A, Goldmeier D, Comninos AN, Dhillo WS. Melanocortin 4 receptor agonism enhances sexual brain processing in women with hypoactive sexual desire disorder. J Clin Invest. 2022;132(19):e152341. https://pubmed.ncbi.nlm.nih.gov/36189794/
[20] Kingsberg SA, Clayton AH, Portman D, Williams LA, Krop J, Jordan R, Lucas J, Simon JA. Bremelanotide for the Treatment of Hypoactive Sexual Desire Disorder: Two Randomized Phase 3 Trials. Obstet Gynecol. 2019;134(5):899-908. https://pubmed.ncbi.nlm.nih.gov/31599840/
[21] Simon JA, Kingsberg SA, Portman D, Williams LA, Krop J, Jordan R, Lucas J, Clayton AH. Long-Term Safety and Efficacy of Bremelanotide for Hypoactive Sexual Desire Disorder. Obstet Gynecol. 2019;134(5):909-917. https://pubmed.ncbi.nlm.nih.gov/31599847/
[22] U.S. Food and Drug Administration / DailyMed. Bremelanotide Injection — US Prescribing Information (DailyMed/FDA). DailyMed (US FDA structured product label). 2019. https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=8c9607a2-5b57-4a59-b159-cf196deebdd9

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Peptide Evidence Dispatch is an independent provenance-led reading desk that separates studies, reviews, regulatory records, and commentary; it is neither a clinic nor a source of medical advice.