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Published on: March 25, 2016
miR-370 Sensitizes TMZ Response Dependent of MGMT Status in Primary Central Nervous System Lymphoma
Xinwei Li1, Xueying Xu1, Keng Chen2
1Department of Neurosurgery, Sir Run Run Shaw Hospital, Medical College, Zhejiang University, Hangzhou, 310016, People's Republic of China.
Abstract:
Primary central nervous system lymphoma (PCNSL) is an aggressive and rare subtype of non-Hodgkin lymphoma, arising exclusively in the CNS with a poor prognosis. Previous evidence has proved that MGMT was a promising target involving in TMZ resistance of PCNSL. Our study described a new miR-370-mediated mechanism of MGMT regulation in PCNSL. We first showed that miR-370 was downregulated in PCNSL tissues, while MGMT was inversely overexpressed. It was also observed that miR-370 suppressed the expression of MGMT. Additionally, upregulation of miR-370 significantly increased TMZ sensitivity dependent of MGMT, thus suppressed Raji cell proliferation and induced apoptosis in vitro. In conclusion, these results suggest that miR-370 is a potential target in PCNSL treatment.
Insights
MicroRNA-370 (miR-370) is downregulated in primary central nervous system lymphoma (PCNSL), leading to increased MGMT expression and temozolomide (TMZ) resistance. Upregulating miR-370 may enhance TMZ sensitivity in PCNSL treatment.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Primary central nervous system lymphoma (PCNSL) is a rare, aggressive non-Hodgkin lymphoma with poor prognosis.
- MGMT is implicated in temozolomide (TMZ) resistance in PCNSL.
- Novel therapeutic targets are needed to improve PCNSL treatment outcomes.
Purpose of the Study:
- To elucidate the role of miR-370 in regulating MGMT expression in PCNSL.
- To investigate the therapeutic potential of targeting miR-370 for overcoming TMZ resistance in PCNSL.
Main Methods:
- Quantitative analysis of miR-370 and MGMT expression in PCNSL tissues.
- In vitro studies using Raji cells to assess the effects of miR-370 modulation on MGMT expression, TMZ sensitivity, cell proliferation, and apoptosis.
Main Results:
- miR-370 was found to be downregulated in PCNSL tissues, inversely correlating with MGMT overexpression.
- miR-370 directly suppressed MGMT expression.
- Upregulation of miR-370 enhanced TMZ sensitivity in an MGMT-dependent manner, inhibiting Raji cell proliferation and promoting apoptosis in vitro.
Conclusions:
- miR-370 plays a crucial role in regulating MGMT expression in PCNSL.
- miR-370 represents a potential therapeutic target for enhancing TMZ efficacy in PCNSL treatment.
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