DADS suppresses human esophageal xenograft tumors through RAF/MEK/ERK and mitochondria-dependent pathways

Xiaoran Yin1, Jun Zhang2, Xiaoning Li3

  • 1Department of Oncology, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China. yinxiaoran@163.com.

Insights

Diallyl disulfide (DADS), a garlic compound, effectively inhibits esophageal cancer growth and promotes apoptosis in cells and animal models. DADS shows promise as a safe and potent anticancer agent for esophageal carcinoma.

Area of Science:

  • Oncology
  • Pharmacology
  • Biochemistry

Background:

  • Diallyl disulfide (DADS) is a natural organosulfur compound found in garlic with known anticancer properties.
  • The specific anticancer mechanisms of DADS in human esophageal carcinoma, particularly in vivo, remain largely unelucidated.
  • Esophageal carcinoma is a significant global health concern requiring novel therapeutic strategies.

Purpose of the Study:

  • To investigate the anticancer mechanisms of DADS in human esophageal carcinoma cells (ECA109) and in vivo xenograft models.
  • To evaluate the efficacy and safety of DADS as a potential therapeutic agent for esophageal carcinoma.
  • To elucidate the molecular pathways involved in DADS-induced apoptosis and proliferation inhibition.

Main Methods:

  • MTT assays were used to assess cell viability in ECA109 cells and normal liver cells.
  • Annexin V-FITC/propidium iodide (PI) staining and flow cytometry were employed to detect apoptosis.
  • Xenograft studies in nude mice were conducted to evaluate tumor growth inhibition and safety profiles.

Main Results:

  • DADS significantly reduced ECA109 cell viability with minimal toxicity to normal liver cells.
  • DADS induced apoptosis in a dose-dependent manner, confirmed by flow cytometry and caspase-3 inhibition.
  • In vivo, DADS treatment inhibited ECA109 tumor growth, reduced proliferation (PCNA), and activated apoptosis via the mitochondria-dependent pathway, involving caspase-3, p53, Bax/Bcl-2 ratio, and the RAF/MEK/ERK pathway.

Conclusions:

  • DADS demonstrates significant anticancer effects against human esophageal carcinoma in both in vitro and in vivo models.
  • DADS induces apoptosis and inhibits proliferation through specific molecular pathways, including the mitochondria-dependent pathway and modulation of key proteins and signaling cascades.
  • DADS presents as a safe and effective potential therapeutic agent for esophageal carcinoma, warranting further clinical investigation.