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Related Concept Videos

MicroRNAs01:22

MicroRNAs

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MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
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Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
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MicroRNA Expression in High-Grade B-Cell Lymphoma With 11q Aberration.

Gioia Di Stefano1,2, Anja Fischer2, Emil Chteinberg2

  • 1Histopathology and Molecular Diagnostics, Careggi University Hospital, Florence, Italy.

Genes, Chromosomes & Cancer
|January 23, 2025
PubMed
Summary
This summary is machine-generated.

High-grade B-cell lymphoma with 11q aberration (HGBCL-11q) shows distinct microRNA (miRNA) expression compared to Burkitt lymphoma (BL) and Diffuse large B-cell lymphoma (DLBCL). miR-3919 is significantly overexpressed in HGBCL-11q, offering potential diagnostic insights.

Keywords:
Burkitt lymphomadiffuse large B‐cell lymphomahigh‐grade B‐cell lymphoma with 11q aberrationmicro‐RNAs

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Area of Science:

  • Hematology
  • Oncology
  • Molecular Biology

Background:

  • Mature aggressive B-cell lymphomas, including Burkitt lymphoma (BL) and Diffuse large B-cell lymphoma (DLBCL), exhibit variable microRNA (miRNA) expression.
  • High-grade B-cell lymphoma with 11q aberration (HGBCL-11q) shares biological similarities with BL and DLBCL, but its miRNA profile is understudied.

Purpose of the Study:

  • To investigate and compare the miRNA expression profiles of HGBCL-11q against BL and DLBCL.
  • To identify specific miRNAs that differentiate HGBCL-11q from other aggressive B-cell lymphomas.

Main Methods:

  • Expression profiles of 2083 miRNAs were analyzed in HGBCL-11q, BL, DLBCL, and tonsil samples.
  • HTG EdgeSeq miRNA whole transcriptome assay was employed for miRNA profiling.
  • Uniform Manifold Approximation and Projection (UMAP) and DESeq2 differential expression analysis were utilized.

Main Results:

  • UMAP analysis did not reveal distinct miRNA expression clusters for the lymphomas.
  • Differential expression analysis identified specific upregulated miRNAs in HGBCL-11q compared to BL and DLBCL.
  • miR-3919 was consistently and significantly overexpressed in HGBCL-11q relative to both BL and DLBCL (p < 0.001).

Conclusions:

  • HGBCL-11q exhibits a unique miRNA expression signature compared to BL and DLBCL.
  • The identified differentially expressed miRNAs, particularly miR-3919, may serve as potential biomarkers for HGBCL-11q.
  • Further research into these miRNA differences could refine lymphoma classification and treatment strategies.