Mechanistic Insights into the Anticancer Effects of Homeopathic Arsenicum Iodatum: Apoptosis Induction, Cell-Cycle Arrest, and Caspase Activation in A549 Lung Cancer Cells.

BACKGROUND/AIMS: Homeopathic medicines, including Arsenicum iodatum, have attracted increasing interest as potential adjunctive approaches in cancer research. However, the cellular mechanisms underlying their reported biological effects remain poorly understood. This study investigated the effects of homeopathic Arsenicum iodatum on apoptosis, cell cycle progression, and caspase activation in A549 human lung adenocarcinoma cells. METHODS: A549 cells were treated with Arsenicum iodatum potencies (6C, 12C, 30C, and 200C). Apoptosis and cell cycle distribution were assessed by flow cytometry, while Caspase-7 and Caspase-9 activities were determined using indirect ELISA to evaluate the involvement of the intrinsic apoptotic pathway. RESULTS: All tested potencies increased apoptotic cell populations compared with the control groups. The most pronounced biological effects were observed at the 30C and 200C potencies. These higher potencies were also associated with increased Caspase-7 and Caspase-9 activities, suggesting activation of the intrinsic apoptotic pathway. Vehicle-treated cells exhibited only minimal changes, indicating that the observed effects were not attributable to the solvent alone. CONCLUSION: Homeopathic Arsenicum iodatum induced measurable apoptosis-associated and cell cycle-related changes in A549 cells, accompanied by increased caspase activity. The strongest responses were observed at the 30C and 200C potencies. These findings suggest the involvement of intrinsic apoptotic signaling and warrant further mechanistic investigation. As this study represents an exploratory in vitro analysis, validation in additional experimental models and independent biological systems is required before broader conclusions can be drawn.