Induction of Cell Death in the Human Acute Lymphoblastic Leukemia Cell Line Reh by Infection with Rotavirus Isolate...

Area of Science:

• Oncology
• Virology
• Cell Biology

Background:

• Cancer presents a significant global health challenge, driving the search for novel therapeutic strategies.
• Advances in cancer treatment include complementary and alternative approaches beyond conventional methods.
• Tumor-cell adapted viruses are being explored as potential oncolytic agents.

Purpose of the Study:

• To identify cell surface receptors utilized by a tumor-adapted rotavirus (Wt1-5).
• To determine the cell death markers induced by Wt1-5 infection in leukemia cells.
• To evaluate Wt1-5 as a potential oncolytic agent.

Main Methods:

• Infection of human acute lymphoblastic leukemia (Reh) cells with Wt1-5 rotavirus.
• Flow cytometry and antibody blocking assays to identify cell surface receptors.
• Analysis of viral antigens and cell death markers (e.g., membrane permeability, mitochondrial potential, DNA fragmentation) via flow cytometry.

Main Results:

• Rotavirus Wt1-5 utilizes cell surface proteins including heat shock proteins (HSPs 90, 70, 60, 40), Hsc70, PDI, and integrin β3 for infection.
• Wt1-5 infection induced significant cytotoxic effects in Reh cells.
• Observed effects included altered membrane permeability, mitochondrial membrane potential, DNA fragmentation, and activated cell death signaling.

Conclusions:

• Rotavirus Wt1-5 effectively infects leukemia cells by engaging specific cell surface proteins.
• The virus induces apoptosis, a programmed cell death pathway, in lymphoblastic leukemia cells.
• Wt1-5 demonstrates promise as a candidate oncolytic agent for treating leukemia.