Spontaneously regressive hemopathies : mastocytosis and lymphomatoid papulosis
type: Dataset
description: Childhood mastocytosis and lymphomatoid papulosis are mostly spontaneously regressive diseases.Mastocytosis is a clonal myeloproliferative disease; whereas cutaneous forms may regressspontaneously especially in childhood, the disease is chronic among adults. KIT mutations aredifferent between children and adults. We showed in vivo that children with mastocytosis displaydecreased telomerase expression with shorter telomere length. In vitro, using infected cells withdifferent KIT mutants, "paediatric" or "adult " one, we found longer telomere among adult mutant withdecreased senescence compared to paediatric mutant, without significant differences of telomeraseexpression and activity. These observations could explain the regression in paediatric mastocytosis.Lymphomatoid papulosis is a primary cutaneous CD30+ T-cell lymphoproliferative disorder.Cutaneous lesions are spontaneously regressive but association with a T-cell lymphoma is observed in10 to 20% of cases. We studied PDGFRβ expression to explain proliferative phase and telomerebiology to understand the regressive phase of the disease. Our result showed that PDGFRβ expressionin CD30+ cells was associated to short telomeres. In conclusion, we showed for the first time thattelomere length in mastocytosis and lymphomatoid papulosis seemed to be correlated with diseaseoutcome; on the other hand, we identify a mutation potentially aggressive. Taken together, werecommend to systematically look for KIT mutation among each patient with mastocytosis in order tocarefully monitor them when the cutaneous lesions are persistent and/or progressive.
landing page: https://theses.hal.science/tel-00980884
identifier: NNT: 2013PA11T015
keyword: infoeu-reposemanticsdoctoralthesis
keyword: kit
keyword: lymphomatoid-papulosis
keyword: mastocytose
keyword: mastocytosis
keyword: papulose-lymphomatoide
keyword: sdvsalife-sciences-q-bioagricultural-sciences
keyword: telomerase
keyword: telomeres
keyword: theses
issued: 2026-05-05T14:03:27.114783
modified: 2026-05-05T14:03:27.114789
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Spontaneously regressive hemopathies : mastocytosis and lymphomatoid papulosis
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00980884
issued: 2026-05-05T14:03:27.122124
modified: 2026-05-05T14:03:27.100551