[Expression absence of LRRC4 gene in glioblastoma cell lines]
Ming-Hua Wu1, Xiao-Ling Li, Chen Huang
1Cancer Research Institute, Central South University, Changsha, China.
Objective:
To examine the expression absence of LRRC4 gene in glioblastoma cell lines.
Methods:
RT-PCR and Northern blot were used to detect the expression of LRRC4 gene in 6 glioblastomas cells lines. Polymerase chain reaction and DNA sequencing were used to screen the LRRC4 gene mutation, while bioinformation assay was used to search for the reason of LRRC4 gene absence in U251 cell lines.
Results:
The expression of LRRC4 was absent in 6 malignant glioma cell lines (U251, U87, BT325, SF126, SF767 and M17), which were examined by Northern-blot and RT-PCR assay. All sequencing of PCR products from gDNA of SF126, SF767, and M17 cell lines contained the point mutation at the same position ( LRRC4 geneT977A) (3/5), which was a synonymous mutation. However, PCR products from gDNA of U251 and U87 cell lines (2/5) were not obtained. The expression absence of LRRC4 was ascribed to the loss of homozygosity of 7q32-ter in U251 cell lines.
Conclusion:
The expression of LRRC4 gene is absent in glioblastoma cell lines, and it offers the important experiment proof for LRRC4 to act as a new candidate of brain tumor suppressor gene from glioma. The loss of homozygosity of 7q32-ter contributed to the expression absence of LRRC4 in U251 cell lines.
Insights
The leucine-rich repeat containing 4 (LRRC4) gene is absent in glioblastoma cell lines. This finding supports LRRC4 as a potential brain tumor suppressor gene in gliomas.
Area of Science:
- Genetics
- Molecular Biology
- Oncology
Context:
- Glioblastoma is an aggressive brain tumor with limited treatment options.
- Understanding the genetic alterations in glioblastoma is crucial for developing targeted therapies.
- The LRRC4 gene's role in brain tumor development is under investigation.
Purpose:
- To investigate the expression status of the LRRC4 gene in glioblastoma cell lines.
- To identify potential genetic mechanisms underlying LRRC4 gene absence in glioblastoma.
Summary:
- The leucine-rich repeat containing 4 (LRRC4) gene expression was found to be absent in all six glioblastoma cell lines examined (U251, U87, BT325, SF126, SF767, and M17).
- Point mutations in the LRRC4 gene were identified in three cell lines (SF126, SF767, M17), while PCR products could not be obtained from two others (U251, U87).
- Loss of heterozygosity at 7q32-ter was identified as the cause for LRRC4 gene absence in U251 cell lines.
Impact:
- Provides experimental evidence for LRRC4 as a candidate tumor suppressor gene in glioma.
- Highlights the potential role of LRRC4 in glioblastoma pathogenesis.
- Suggests that alterations in LRRC4 may be a target for future glioblastoma therapies.
