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Proliferation and Differentiation of Murine Myeloid Precursor 32D/G-CSF-R Cells
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Infantile Myelofibrosis and Myeloproliferation with CDC42 Dysfunction
Jeffrey M Verboon1,2, Dilnar Mahmut1,2, Ah Ram Kim1,2
1Division of Hematology/Oncology, Boston Children's Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA.
Journal of Clinical Immunology
|April 19, 2020
Summary
A novel mutation in the Rho GTPase CDC42 gene causes infantile myelofibrosis and myeloproliferation by disrupting hematopoietic cell-microenvironment interactions. This discovery may shed light on other blood disorders.
Area of Science:
- Hematology
- Genetics
- Cell Biology
Background:
- Genetic blood disorders offer insights into hematopoiesis regulation.
- Limited understanding exists regarding hematopoietic cell-microenvironment interaction regulation in genetic studies.
Observation:
- Two siblings presented with infantile myelofibrosis and myeloproliferation.
- A shared de novo mutation in Rho GTPase CDC42 (p.R186C) was identified, originating from paternal germline mosaicism.
Findings:
- Functional studies revealed the CDC42 mutant exhibits altered activity.
- This alteration disrupts interactions between hematopoietic progenitors and microenvironmental factors.
Implications:
- Investigating this CDC42 mutation may illuminate the role of cell-microenvironment interactions in health and disease.
- CDC42 deregulation could be implicated in common blood disorders like primary myelofibrosis.
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