We present details of a neonate with extensive naevus sebaceus in whom we identified a pathogenic mutation in HRAS (c.37G > C; p.Gly13Arg), but only in lesional skin DNA, consistent with a mosaic RASopathy.
A multigene hotspot mutational profiling of the BRAF, NRAS, HRAS and KRAS genes was carried out, and a shared G13R HRAS mutation in both the trichoblastoma and the sebaceous nevus components was found.
We present details of a neonate with extensive naevus sebaceus in whom we identified a pathogenic mutation in HRAS (c.37G > C; p.Gly13Arg), but only in lesional skin DNA, consistent with a mosaic RASopathy.
The facial and hair abnormalities of the HRAS p.Gly13Asp individuals differ from the typical pattern observed in those showing the common HRAS (p.Gly12Ser) mutation, with less coarse facial features and slow growing, sparse hair with abnormal texture, the latter resembling the pattern observed in Noonan syndrome-like disorder with loose anagen hair and individuals harboring another amino acid substitution in HRAS (p.Gly13Cys).
We present details of a neonate with extensive naevus sebaceus in whom we identified a pathogenic mutation in HRAS (c.37G > C; p.Gly13Arg), but only in lesional skin DNA, consistent with a mosaic RASopathy.
Although some individuals with HRAS p.Gly13Asp developed papillomata and vascular proliferation lesions, no malignant tumors occurred, similar to what was reported for individuals harboring the HRAS p.Gly13Cys.
Here, we show that depletion of RAF-1, a RAF family member with a poorly defined role in TC, decreases proliferation and increases apoptosis in TPC-1 cells and, less significantly, in cells harboring a BRAF(V600E) or HRAS(G13R) mutations, but without affecting ERK activation.
Here, we show that depletion of RAF-1, a RAF family member with a poorly defined role in TC, decreases proliferation and increases apoptosis in TPC-1 cells and, less significantly, in cells harboring a BRAF(V600E) or HRAS(G13R) mutations, but without affecting ERK activation.
The individuals with p.G13C had many typical findings including polyhydramnios, failure-to-thrive, HCM, macrocephaly with posterior fossa crowding, and developmental delay.
The individuals with p.G13C had many typical findings including polyhydramnios, failure-to-thrive, HCM, macrocephaly with posterior fossa crowding, and developmental delay.