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Assessing Autophagic Flux by Measuring LC3, p62, and LAMP1 Co-localization Using Multispectral Imaging Flow Cytometry
Published on: July 21, 2017
Expression profiling reveals coordinated dysregulation of autophagy-associated proteins in marginal zone lymphoma and
Jingshu Ruan1,2, Xin Zhou2, Ai Li1
1Department of Hematology, The Second Hospital of Shandong University, Jinan, Shandong 250033, P.R. China.
Abstract:
Dysregulated autophagy and its therapeutic targeting have emerged as focal points in oncology research; however, specific studies investigating autophagy in marginal zone lymphoma (MZL) pathogenesis remain limited. The present study comprehensively characterized the expression profiles of key autophagy-related proteins in MZL, providing novel mechanistic insights and an experimental rationale for therapeutic intervention. Immunohistochemical analysis assessed the expression of Beclin-1, light chain (LC)3, sequestosome (SQSTM)1/p62 and Bcl-2 in formalin-fixed paraffin-embedded tissues from 16 patients with MZL compared with 16 reactive lymphoid hyperplasia (RLH) controls. MZL specimens exhibited significant autophagy pathway dysregulation, characterized by ~35-40% decreased expression of Beclin-1 and LC3 and 30-45% increased expression of SQSTM1/p62 and Bcl-2 compared with RLH tissues (P<0.05 for all proteins analyzed). The present findings delineate a distinct profile of autophagy dysfunction in MZL, highlighting aberrant Beclin-1, LC3, SQSTM1/p62 and Bcl-2 expression as potential disease biomarkers and therapeutic targets. This study provides a critical basis for elucidating the molecular mechanisms underlying MZL pathogenesis and underscores the therapeutic potential of modulating autophagy-related pathways.
Insights
Autophagy, a cellular process, is dysregulated in marginal zone lymphoma (MZL). Key protein changes in MZL suggest autophagy modulation as a potential therapeutic strategy for this lymphoma.
Area of Science:
- Oncology
- Cell Biology
- Molecular Medicine
Background:
- Autophagy dysregulation is a key area in oncology research.
- Limited studies exist on autophagy's role in marginal zone lymphoma (MZL) pathogenesis.
- Targeting autophagy presents a potential therapeutic avenue in cancer treatment.
Purpose of the Study:
- To characterize autophagy-related protein expression in MZL.
- To investigate the role of autophagy in MZL pathogenesis.
- To provide a rationale for therapeutic targeting of autophagy in MZL.
Main Methods:
- Immunohistochemical analysis of Beclin-1, LC3, SQSTM1/p62, and Bcl-2.
- Comparison of protein expression in MZL tissues versus reactive lymphoid hyperplasia (RLH) controls.
- Analysis of formalin-fixed paraffin-embedded tissue samples from 16 MZL patients and 16 RLH controls.
Main Results:
- MZL tissues showed significantly decreased expression of Beclin-1 and LC3 (~35-40%).
- MZL tissues exhibited significantly increased expression of SQSTM1/p62 and Bcl-2 (~30-45%).
- These changes indicate significant autophagy pathway dysregulation in MZL compared to RLH (P<0.05).
Conclusions:
- MZL displays a distinct profile of autophagy dysfunction.
- Aberrant expression of Beclin-1, LC3, SQSTM1/p62, and Bcl-2 may serve as disease biomarkers.
- Modulating autophagy pathways holds therapeutic potential for marginal zone lymphoma.
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