Related Experiment Video
Updated: Jan 31, 2026
Use of Hematopoietic Stem Cell Transplantation to Assess the Origin of Myelodysplastic Syndrome
Published on: October 3, 2018
Molecular pathogenesis of myelodysplastic syndromes with deletion 5q
Jung-Hoon Lee1, Alan List2, David A Sallman2
1University of South Florida Morsani College of Medicine, Tampa, Florida.
Abstract:
The molecular pathogenesis of deletion 5q (del(5q)) myelodysplastic syndrome (MDS) has recently been realized as a result of major advances in our understanding of the mechanisms responsible for clinical phenotype. Identification of commonly deleted genes such as RPS14, miRNA-145, HSPA9, CD78, and CSNK1a1 have elucidated the precise biological changes responsible for the anemia, leukopenia, and thrombocytosis that characterizes del(5q) MDS and highlighted the importance of allelic haploinsufficiency in the hematological phenotype. Recent elegant investigations have also identified a critical role of innate immune signaling in del(5q) pathogenesis. TP53 and Wnt/β-catenin pathways have also been found to be involved in clonal expansion and progression of the disease as well as resistance and poor outcomes to available therapy. Understanding the molecular pathogenesis of the disease has provided a critical foundation in identifying the biological targets of lenalidomide in del(5q) MDS, which has led to the development of novel therapeutic agents in hematologic malignancies as well as potential alternative targets to exploit in patients who have failed lenalidomide treatment.
Insights
Molecular insights into deletion 5q myelodysplastic syndrome (MDS) reveal gene roles in anemia and low blood counts. Understanding these mechanisms guides new lenalidomide-based therapies and alternative treatments.
Area of Science:
- Hematology
- Molecular Biology
- Genetics
Background:
- Deletion 5q myelodysplastic syndrome (MDS) is characterized by anemia, leukopenia, and thrombocytosis.
- Recent advances have elucidated the molecular pathogenesis and clinical phenotype of del(5q) MDS.
Purpose of the Study:
- To summarize the current understanding of molecular pathogenesis in del(5q) MDS.
- To highlight the role of specific genes and pathways in disease development and progression.
- To discuss the implications for therapeutic strategies, including lenalidomide treatment.
Main Methods:
- Review of recent scientific literature on del(5q) MDS molecular pathogenesis.
- Analysis of commonly deleted genes (e.g., RPS14, miRNA-145) and their functional impact.
- Investigation of innate immune signaling, TP53, and Wnt/β-catenin pathways in disease progression.
Main Results:
- Allelic haploinsufficiency of deleted genes contributes to the characteristic hematological phenotype.
- Innate immune signaling plays a critical role in del(5q) MDS pathogenesis.
- TP53 and Wnt/β-catenin pathways are implicated in clonal expansion, disease progression, and treatment resistance.
Conclusions:
- Understanding molecular pathogenesis is key to identifying therapeutic targets in del(5q) MDS.
- This knowledge has informed the development of lenalidomide and potential alternative treatments for refractory cases.
- Further research into these pathways may yield novel therapeutic strategies for hematologic malignancies.
Related Concept Videos
01:30Pulmonary Hypertension: Classification and Pathogenesis
There are various classifications for PH, each relating to different underlying causes and also...
01:20Asthma: Pathogenesis and Management
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
01:23Cystic Fibrosis: Pathogenesis
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
01:20COPD: Pathogenesis and Clinical Features
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
02:00Molecular Models
03:51Molecular Orbital Theory II