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Updated: Mar 17, 2026
Chromosome Preparation From Cultured Cells
Published on: January 28, 2014
Familial Lymphoproliferative Disorders with Chromosomal Fragile Site Analysis
J A Moormeier1, M E Neilly1, J W Vardiman2
1a Section of Hematology/Oncology, University of Chicago Medical Center, Chicago, Illinois, 60637, USA.
Insights
This study found elevated common fragile sites in a family with clustered B-cell lymphoproliferative disorders. This suggests a potential genetic susceptibility to mutagens contributing to their cancers.
Area of Science:
- Genetics
- Oncology
- Molecular Biology
Background:
- B-cell lymphoproliferative disorders, including hairy cell leukemia and large cell lymphoma, can cluster within families.
- The role of chromosomal fragile sites in cancer development is an area of ongoing research.
- Understanding genetic predispositions is crucial for cancer etiology.
Purpose of the Study:
- To investigate chromosomal fragile site expression in a family with multiple B-cell lymphoproliferative disorders.
- To determine if rare or common fragile sites are associated with the observed cancer clustering.
- To explore potential links between fragile site expression and mutagenic susceptibility.
Main Methods:
- Analysis of chromosomal fragile sites (rare and common) in peripheral blood lymphocytes.
- Comparison of fragile site expression levels between affected family members and healthy controls.
- Statistical analysis to assess the significance of observed differences.
Main Results:
- No significant difference in the number of rare fragile sites between patients and controls.
- Significantly elevated expression of common fragile sites in all affected family members compared to controls.
- Hairy cell leukemia and large cell lymphoma were diagnosed in three family members within nine months.
Conclusions:
- Elevated common fragile site expression may indicate a genetic susceptibility to mutagenic damage in this family.
- Environmental mutagen exposure is a potential contributing factor to the temporal clustering of malignancy.
- Further research is needed to elucidate the relationship between common fragile sites and cancer development.
Abstract:
We have identified a family in which three members developed B-cell lymphoproliferative disorders within a nine month period. The 33 year old proband and his mother have hairy cell leukemia, and his 37 year old brother developed a large cell lymphoma. Chromosomal fragile site analysis of peripheral blood lymphocytes of the three patients as well as two healthy family members was performed. The mean number of rare fragile sites present per cell analyzed was not significantly different from that observed in a group of healthy adults used as controls. However, the level of expression of the common fragile sites detected in each of the study patients was significantly elevated compared to the control population. Although the relationship between the level of expression of common fragile sites and the subsequent development of a malignant process is unknown, many of the agents that induce these sites are known mutagens, and the level of their expression may reflect a genetic susceptibility to mutagenic damage. Thus, it is possible that common exposure to an environmental mutagen may have contributed to the temporal clustering of malignancy in this family.
