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Activation of mammalian target of rapamycin in diffuse large B-cell lymphoma: a clinicopathological study

Neerja Vajpayee1, Charu Thakral, Srivalli Gopaluni

  • 1Department of Pathology, SUNY Upstate Medical University, Syracuse, NY 13210, USA. vajpayen@upstate.edu

Leukemia Research
|August 21, 2012
PubMed

Insights

Targeted therapy using mammalian target of rapamycin (mTOR) inhibitors may improve survival for diffuse large B-cell lymphoma patients. Higher mTOR expression correlated with adverse clinical factors and a trend toward shorter survival in this patient cohort.

Area of Science:

  • Oncology
  • Cell Biology
  • Molecular Medicine

Background:

  • Mammalian target of rapamycin (mTOR) is a conserved serine/threonine kinase crucial for cell proliferation.
  • Dysregulation of cell signaling pathways is implicated in lymphomagenesis.

Purpose of the Study:

  • To investigate the expression of mTOR, phosphorylated mTOR (pmTOR), and bcl-2 in diffuse large B-cell lymphoma (DLBCL).
  • To correlate mTOR expression with clinical parameters and patient outcomes in DLBCL.

Main Methods:

  • Immunohistochemical analysis of mTOR, pmTOR, and bcl-2 expression.
  • Correlation of protein expression with clinical data and survival outcomes in 55 DLBCL patients.

Main Results:

  • Higher mTOR expression was associated with male gender, older age, and higher International Prognostic Index (IPI) scores.
  • Patients with elevated total mTOR scores exhibited a trend towards shorter overall survival.

Conclusions:

  • mTOR signaling is implicated in the progression of diffuse large B-cell lymphoma.
  • Targeted inhibition of mTOR may represent a potential therapeutic strategy for a subset of DLBCL patients, potentially improving survival outcomes.

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