Mitochondria-specific peptide amphiphiles induce mitochondrial dysfunction and peripheral T-cell lymphomas (PTCL)...

Area of Science:

• Biochemistry
• Molecular Biology
• Oncology

Background:

• Peripheral T-cell lymphomas (PTCL) are aggressive cancers with limited treatment options.
• Mitochondria represent a promising therapeutic target for PTCL due to their role in cell survival.
• Novel peptide amphiphiles were designed to target mitochondrial VDAC1-HKII interactions.

Purpose of the Study:

• To investigate the efficacy of peptide amphiphiles (Pal-pHK-pKV and pHK-pKV) in treating PTCL.
• To elucidate the mechanism of action of these peptides on mitochondrial function and apoptosis.
• To evaluate the potential of targeting mitochondrial VDAC1-HKII interaction for PTCL therapy.

Main Methods:

• Treatment of PTCL cell line H9 with peptide amphiphiles.
• Assessment of cell proliferation, apoptosis markers (Ki-67, cytochrome c, caspase-3), and mitochondrial function (membrane potential, ATP production).
• Analysis of signaling pathways including ERK/BCL-2 and expression of BAX and FAS.

Main Results:

• Peptide amphiphiles effectively blocked VDAC1-HKII interaction, detaching HKII from mitochondria.
• Mitochondrial dysfunction, decreased ATP production, and depolarization of mitochondrial membrane potential were observed.
• Induction of apoptosis through intrinsic and extrinsic pathways (cytochrome c release, FAS expression) and inhibition of ERK/BCL-2 signaling.

Conclusions:

• Mitochondria-specific peptide amphiphiles induce mitochondrial dysfunction and apoptosis in PTCL cells.
• These compounds represent a novel therapeutic approach for PTCL by targeting VDAC1-HKII interaction.
• Further research into peptide amphiphiles holds promise for developing new PTCL treatments.