{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T14:00:08Z","timestamp":1785420008030,"version":"3.56.0"},"reference-count":56,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2025,9,29]],"date-time":"2025-09-29T00:00:00Z","timestamp":1759104000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.mdpi.com"],"crossmark-restriction":true},"short-container-title":["Current Oncology"],"abstract":"<jats:p>Colorectal cancer (CRC) remains a major contributor to global cancer-related mortality, with rising incidence observed in several regions, including Saudi Arabia. This review compiles and critically analyzes recent preclinical research from Saudi-based institutions that investigates the anti-CRC potential of natural and synthetic compounds. Numerous natural products such as Nigella sativa, Moringa oleifera, Curcuma longa, and marine-derived metabolites have demonstrated cytotoxic effects through pathways involving apoptosis induction, reactive oxygen species (ROS) generation, and inhibition of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-\u03baB) and cyclooxygenase-2 (COX-2). In parallel, synthetic and semi-synthetic agents, including C4\u2013G4 (semi-synthetic hybrids designed from flavonoids and benzoxazole scaffolds that act as dual epidermal growth factor receptor (EGFR)\/COX-2 inhibitors)), oxazole derivatives, and camptothecin-based nanocarriers, exhibit promising anti-tumor activity via molecular targeting of cyclin-dependent kinase 8 (CDK8), phosphatidylinositol 3-kinase\/protein kinase B (PI3K\/Akt), and \u03b2-catenin pathways. Selected in vivo studies primarily utilizing xenograft and chemically induced rodent models have shown reductions in tumor volume and modulation of apoptotic and inflammatory biomarkers. Additionally, green-synthesized metallic nanoparticles (NPs) and polyethylene glycol (PEG)-modified carriers have been investigated to improve bioavailability and tumor targeting of lead compounds. While these findings are encouraging, the majority remain in preclinical phases. Limitations such as poor solubility, lack of pharmacokinetic data, and absence of clinical trials impede translational progress. This review highlights the need for standardized evaluation protocols, mechanistic validation, and region-specific clinical studies to assess efficacy and safety. Given Saudi Arabia\u2019s rich biodiversity and growing research capacity under national strategies like Vision 2030, the country is well-positioned to contribute meaningfully to CRC drug discovery. By integrating bioactive natural products, rationally designed synthetics, and advanced delivery platforms, a pipeline of innovative CRC therapeutics tailored to local and global contexts may be realized.<\/jats:p>","DOI":"10.3390\/curroncol32100546","type":"journal-article","created":{"date-parts":[[2025,9,29]],"date-time":"2025-09-29T14:01:39Z","timestamp":1759154499000},"page":"546","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Natural and Synthetic Compounds Against Colorectal Cancer: An Update of Preclinical Studies in Saudi Arabia"],"prefix":"10.3390","volume":"32","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6437-711X","authenticated-orcid":false,"given":"Mansoor-Ali","family":"Vaali-Mohammed","sequence":"first","affiliation":[{"name":"Department of Zoology, Jamal Mohamed College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli 620020, India"},{"name":"Colorectal Cancer Research, Surgery Department, College of Medicine, King Saud University, Riyadh 11472, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-3011-8271","authenticated-orcid":false,"given":"Adhila","family":"Nazar","sequence":"additional","affiliation":[{"name":"Department of Pharmacy, Nehru College of Pharmacy, Affiliated to Kerala University of Health Sciences, Thrissur 680541, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohamad","family":"Meeramaideen","sequence":"additional","affiliation":[{"name":"Department of Zoology, Jamal Mohamed College (Autonomous), Affiliated to Bharathidasan University, Tiruchirappalli 620020, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7484-2265","authenticated-orcid":false,"given":"Saleha","family":"Khan","sequence":"additional","affiliation":[{"name":"General Medicine Practice Program, Batterjee Medical College, Jeddah 21442, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,9,29]]},"reference":[{"key":"ref_1","first-page":"e64564","article-title":"Epidemiology of colorectal cancer in Saudi Arabia: A review","volume":"16","author":"Alessa","year":"2024","journal-title":"Cureus"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"13","DOI":"10.31557\/APJCP.2023.24.1.13","article-title":"Colorectal cancer in Saudi Arabia: The way forward","volume":"24","author":"Elwali","year":"2023","journal-title":"Asian Pac. 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