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APOC1 inhibit NKTCL doxorubicin sensitivity by promoting mitophagy

Sa Xiao^1,2, Jing Kuang², Jiamei Yang²

¹The First Affiliated Hospital of Zhengzhou University, Zhengzhou City, Henan Province, People's Republic of China.

|January 16, 2025

Abstract:

NKTCL is a highly aggressive malignant tumor, especially prevalent in the southern regions of China. Although chemotherapy regimens based on ADM have achieved certain therapeutic effects in early treatment, the issue of ADM resistance severely limits the therapeutic efficacy and makes it difficult to improve patient survival rates. Our research results indicate that the expression level of APOC1 is closely related to the sensitivity of NKTCL cells to ADM. The upregulation of APOC1 may promote mitophagy, clear damaged mitochondria, stabilize the intracellular environment, and enhance the tolerance of tumor cells to ADM. Furthermore, APOC1 may further affect the formation of mitophagy and drug resistance by activating specific signaling pathways, such as the STAT3 signaling pathway. Animal experiments further confirm the conclusions of in vitro experiments, showing that APOC1 regulates mitophagy through p-STAT3^Tyr705, thereby promoting the drug resistance of NKTCL. These findings provide a new perspective for the development of novel therapeutic strategies targeting APOC1 and its associated signaling pathways, which may help overcome the issue of ADM resistance in NKTCL.

Insights

Apolipoprotein C1 (APOC1) upregulation enhances Natural Killer/T-cell Lymphoma (NKTCL) resistance to Adriamycin (ADM) chemotherapy by promoting mitophagy via the STAT3 pathway. Targeting APOC1 may overcome ADM resistance in NKTCL.

Area of Science:

Oncology
Molecular Biology
Cell Biology

Background:

Natural Killer/T-cell Lymphoma (NKTCL) is an aggressive malignancy with limited treatment options.
Adriamycin (ADM) chemotherapy is used for NKTCL but faces significant drug resistance.
Understanding mechanisms of ADM resistance is crucial for improving NKTCL patient outcomes.

Purpose of the Study:

To investigate the role of Apolipoprotein C1 (APOC1) in ADM resistance in NKTCL.
To elucidate the molecular pathways involved in APOC1-mediated drug resistance.

Main Methods:

In vitro studies on NKTCL cell lines.
Analysis of APOC1 expression levels and their correlation with ADM sensitivity.
Investigation of mitophagy and STAT3 signaling pathway activation.
In vivo animal experiments to validate findings.

Main Results:

APOC1 expression levels are closely linked to NKTCL cell sensitivity to ADM.
Upregulated APOC1 promotes mitophagy, clearing damaged mitochondria and enhancing ADM tolerance.
APOC1 activates the STAT3 signaling pathway (p-STAT3^Tyr705), contributing to mitophagy and drug resistance.
Animal models confirmed APOC1's role in regulating mitophagy and promoting ADM resistance.

Conclusions:

APOC1 plays a significant role in promoting ADM resistance in NKTCL.
The APOC1-mitophagy-STAT3 signaling axis is a key mechanism underlying drug resistance.
Targeting APOC1 and its associated pathways offers a potential strategy to overcome ADM resistance in NKTCL.

Read full analysis

Keywords:

ADM resistance APOC1 Mitophagy NKTCL STAT3

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