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Published on: January 20, 2014
Alteration of nuclear matrix protein composition of neuroblastoma cells after arsenic trioxide treatment
Abstract:
The aims of the present study were to assess the effects of arsenic trioxide on the nuclear matrix protein profiles of mouse neuroblastoma cells. Arsenic trioxide induces apoptosis of acute promyelocytic leukemia cells. Our results demonstrated that 2 microM As2O3 could significantly inhibit the growth of Neuro-2a cells. As early as 24 hours after As2O3 treatment, we began to observe the alteration of nuclear matrix proteins and apoptosis in tumor cells by TUNEL assay but not by DNA ladder. An increase expression of Hsc in nuclear matrix proteins of 2 microM As2O3 treated cells was also noted. Our results also showed that before a mass range of apoptosis occurred, the composition of nuclear matrix proteins had altered. Hence the alteration of nuclear matrix proteins, such as increased expression of Hsc, may be a sensitive indicator for the detection of early apoptosis.
Insights
Arsenic trioxide (As2O3) alters nuclear matrix proteins in mouse neuroblastoma cells, indicating early apoptosis. Increased Hsc expression serves as a sensitive marker for detecting this cellular change.
Area of Science:
- Cell Biology
- Toxicology
- Cancer Research
Background:
- Arsenic trioxide (As2O3) is known to induce apoptosis in cancer cells.
- Nuclear matrix proteins play crucial roles in cellular processes, including apoptosis.
- Neuroblastoma cells are a model for studying neuronal development and cancer.
Purpose of the Study:
- To investigate the effects of arsenic trioxide on nuclear matrix protein profiles in mouse neuroblastoma cells.
- To identify potential biomarkers for early apoptosis detection.
Main Methods:
- Treatment of Neuro-2a cells with 2 microM arsenic trioxide.
- Analysis of nuclear matrix protein alterations using TUNEL assay.
- Assessment of apoptosis through DNA laddering.
Main Results:
- Arsenic trioxide significantly inhibited the growth of Neuro-2a cells.
- Alterations in nuclear matrix proteins and apoptosis were observed as early as 24 hours post-treatment.
- Increased expression of Hsc (Heat shock cognate protein) was noted in the nuclear matrix proteins of treated cells.
Conclusions:
- The composition of nuclear matrix proteins changes before significant apoptosis occurs.
- Increased expression of Hsc in nuclear matrix proteins can be a sensitive indicator for early apoptosis detection in neuroblastoma cells.
