Hodgkin and Reed-Sternberg cells of classical Hodgkin lymphoma are highly dependent on oxidative phosphorylation

Area of Science:

• Cellular Metabolism
• Oncology
• Immunology

Background:

• Germinal center (GC) B cells are the origin of several lymphomas, including classical Hodgkin's lymphoma (cHL).
• Understanding the unique metabolic properties of tumor cells is crucial for developing effective therapeutic strategies.

Purpose of the Study:

• To compare the metabolic characteristics of Hodgkin-Reed-Sternberg (HRS) cells (cHL tumor cells) with normal GC B cells.
• To investigate the role of oxidative phosphorylation (OXPHOS) in HRS cell growth and viability.

Main Methods:

• Comparative analysis of metabolic profiles between HRS cells and GC B cells.
• Assessment of mitochondrial mass, protein expression related to oxidative metabolism, and mitochondrial biogenesis markers.
• Investigation of the role of NFkappaB in metabolic shifts.
• Functional assays to determine the dependence of HRS cells on OXPHOS for growth and viability.

Main Results:

• HRS cells exhibit a significant shift towards oxidative phosphorylation (OXPHOS)-linked ATP synthesis compared to GC B cells.
• Mitochondrial mass and key proteins involved in oxidative metabolism and biogenesis are upregulated in cHL.
• NFkappaB signaling promotes the shift to OXPHOS in HRS cells.
• HRS cell growth and viability are critically dependent on OXPHOS, with minimal lactate production observed.

Conclusions:

• Oxidative phosphorylation is the dominant energy production pathway in HRS cells, with nonoxidative ATP production playing a minor role.
• The reliance of HRS cells on OXPHOS suggests it as a potential novel therapeutic target for cHL.
• Targeting OXPHOS may offer new avenues for treatment strategies in classical Hodgkin's lymphoma.