RT Journal Article SR Electronic T1 Chlorhexidine Dihydrochloride Shows Anti-tumor Effects in Desmoid Tumors and Colorectal Cancer JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 5435 OP 5443 DO 10.21873/anticanres.17369 VO 44 IS 12 A1 SHIN, HYERAN A1 KIM, YONGHYO A1 LEE, YEHYEONG A1 KIM, JISOO A1 RYU, YEONG CHAN A1 KANG, DONG-WOO A1 KIM, TAE IL A1 CHO, YONG-HEE YR 2024 UL http://ar.iiarjournals.org/content/44/12/5435.abstract AB Background/Aim: Desmoid tumors (DTs), or aggressive fibromatosis, are rare neoplasms arising from connective tissue, frequently exhibiting local invasiveness. The limited treatment options and high recurrence rates of DTs highlight the need for novel therapeutic strategies. This study investigated the efficacy of chlorhexidine dihydrochloride (CD) in inhibiting the growth of DTs and colorectal cancer (CRC). Materials and Methods: A mouse model with Apc mutations, specifically Apc1638N/+, was generated to study DTs. DT cells (Apc1638N+) (DTA) were collected from the mice for in vitro experiments. DTA were treated with CD, along with a CRC cell line (HCT-116), and tumor organoids derived from Apc1638N/+ mice. The effects of CD were assessed through cell viability assay (WST assay), colony formation assay, and cell migration assay. We tested the induction of cell apoptosis through caspase 3/7 activity assays and immunoblot analysis of cleaved-caspase 3 and cleaved-PARP1. Additionally, CD was tested for its anti-tumor efficacy using an in vivo CRC xenograft model with the HCT-116 cell line. Results: CD significantly inhibited the viability, migration, and colony formation of DTA and CRC cells. It remarkably decreased the tumor growth in organoids derived from intestinal tumor cells in the Apc1638N/+ mouse model. Furthermore, CD showed anti-tumor effects in an in vivo CRC xenograft model using the HCT-116 cell line. Conclusion: CD represents a promising therapeutic strategy for treating both DTs and CRC.