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| Content Provider | Springer Nature : BioMed Central |
|---|---|
| Author | Ozeki, Michio Aoki, Yoko Nozawa, Akifumi Yasue, Shiho Endo, Saori Hori, Yumiko Matsuoka, Kentaro Niihori, Tetsuya Funayama, Ryo Shirota, Matsuyuki Nakayama, Keiko Fukao, Toshiyuki |
| Abstract | Background Kaposiform lymphangiomatosis (KLA) has recently been distinguished as a novel subtype of generalized lymphatic anomaly (GLA) with foci of spindle endothelial cells. All cases of KLA involve multiple organs and have an unfavorable prognosis. However, the molecular pathogenesis is unknown, and there are no useful biomarkers. In the present study, we performed genetic analysis to elucidate the cause of this disease and detect biomarkers for it. Methods We performed whole-exome sequencing of DNA samples from leukocytes and a biopsy specimen and analyzed cell-free DNA (cfDNA) from plasma and pleural effusion of patients to identify the NRAS c.182A > G (p.Q61R) mutation using the droplet digital polymerase chain reaction (ddPCR). Results All KLA patients (patients 1–5) had invasive and aggressive features (hemorrhagic pleural effusions, coagulation disorder, and thrombocytopenia) and characteristic findings of KLA in their pathological examinations. In whole exome sequencing for patient 1, c.182A > G missense variant (p.Q61R) in NRAS was identified in fresh frozen samples of a mass on the left chest wall at a frequency of 5% of total alleles but not in his blood leukocytes. Furthermore, the same mutation was detected in cfDNA isolated from plasma and pleural effusion by using ddPCR. ddPCR analysis of plasma/pleural effusion samples from an additional four KLA patients showed that the same mutation was detected in isolated cfDNA in three of the four, as well as in a tissue sample from one of the three plasma/effusion-positive patients that had been obtained to confirm the mutation. Conclusion These results provide the first evidence that NRAS oncogenic variant was identified in DNA samples from KLA patients from not only two affected lesions but also plasma and pleural effusion. |
| Related Links | https://ojrd.biomedcentral.com/counter/pdf/10.1186/s13023-019-1191-5.pdf |
| Ending Page | 9 |
| Page Count | 9 |
| Starting Page | 1 |
| File Format | HTM / HTML |
| ISSN | 17501172 |
| DOI | 10.1186/s13023-019-1191-5 |
| Journal | Orphanet Journal of Rare Diseases |
| Issue Number | 1 |
| Volume Number | 14 |
| Language | English |
| Publisher | BioMed Central |
| Publisher Date | 2019-09-11 |
| Access Restriction | Open |
| Subject Keyword | Medicine Public Health Pharmacology Toxicology Human Genetics Vascular anomaly Kaposiform lymphangiomatosis Neuroblastoma RAS viral oncogene homolog Cell-free DNA Liquid biopsy Medicine/Public Health Pharmacology/Toxicology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pharmacology (medical) Genetics (clinical) |
| Journal Impact Factor | 3.4/2023 |
| 5-Year Journal Impact Factor | 3.9/2023 |
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