{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T21:05:30Z","timestamp":1769807130161,"version":"3.49.0"},"reference-count":57,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T00:00:00Z","timestamp":1769731200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Francisco Jos\u00e9 de Caldas National Fund for Science, Technology, and Innovation of the Ministry of Science, Technology, and Innovation","award":["112721-267-2024"],"award-info":[{"award-number":["112721-267-2024"]}]},{"name":"Francisco Jos\u00e9 de Caldas National Fund for Science, Technology, and Innovation of the Ministry of Science, Technology, and Innovation","award":["121092092332"],"award-info":[{"award-number":["121092092332"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cancers"],"abstract":"<jats:p>Background\/Objectives: Parasporin PS2Aa1, recently designated as Mpp46Aa1, is recognized for its selective anticancer activity against various human cell lines. In this study, specific regions of the native protein were fragmented, and targeted amino acid substitutions were introduced to improve cytotoxic selectivity and potency. Methods: The modified fragments were evaluated individually and in combination with curcumin, a polyphenol with well-documented anticancer properties, and Sacha inchi-derived matrices, known for their antioxidant and antiproliferative activities. Results: Experimental results demonstrated that the substituted variant designated T104L-G108W exhibited superior anticancer activity compared to the native peptide P102-K11. Synergism assays revealed that curcumin-bioconjugated peptides were more effective against the tested cell lines, whereas combinations with Sacha inchi reduced cytotoxicity, suggesting possible interference in the mechanisms of action. Functional assays, including caspase 3\/7 and 9 activation, Annexin V-Cy3 staining, and cell viability analysis with 6-CFDA, confirmed increased sensitivity in SiHa and HeLa cell lines, particularly for peptide T104L-G108W. Conclusions: Collectively, these findings support the effectiveness of a substitution-based strategy in improving parasporin fragments and underscore the therapeutic potential of peptide T104L-G108W as a novel anticancer candidate. Furthermore, this study provides preliminary evidence that natural biomolecules can be optimized through targeted modifications and rational combinations, establishing a framework for the development of sustainable and selective therapeutic approaches in cancer treatment.<\/jats:p>","DOI":"10.3390\/cancers18030451","type":"journal-article","created":{"date-parts":[[2026,1,30]],"date-time":"2026-01-30T11:09:22Z","timestamp":1769771362000},"page":"451","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Parasporin-2-Derived Peptide Fragments: Characterization and Synergistic Anticancer Activity with Sacha Inchi and Curcumin"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-9805-5838","authenticated-orcid":false,"given":"Natalia","family":"Ardila","sequence":"first","affiliation":[{"name":"Instituto de Investigaci\u00f3n Masira, Facultad de Ciencias M\u00e9dicas y de la Salud, Universidad de Santander, Bucaramanga 680001, Colombia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7829-0568","authenticated-orcid":false,"given":"Fanny","family":"Guzm\u00e1n","sequence":"additional","affiliation":[{"name":"Curauma Biotechnology Center, Pontificia Universidad Cat\u00f3lica de Valpara\u00edso, Valpara\u00edso 2362807, Chile"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9258-8101","authenticated-orcid":false,"given":"Miguel O.","family":"Su\u00e1rez-Barrera","sequence":"additional","affiliation":[{"name":"Instituto de Investigaci\u00f3n Masira, Facultad de Ciencias M\u00e9dicas y de la Salud, Universidad de Santander, Bucaramanga 680001, Colombia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3658-0716","authenticated-orcid":false,"given":"Jenniffer","family":"Cruz","sequence":"additional","affiliation":[{"name":"Instituto de Investigaci\u00f3n Masira, Facultad de Ciencias M\u00e9dicas y de la Salud, Universidad de Santander, Bucaramanga 680001, Colombia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,1,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Bukowski, K., Kciuk, M., and Kontek, R. 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