Publications by authors named "Philippe Pellet"

Article Synopsis
  • The study explores the genetic factors associated with the 14q32 duplication that affects the ATG2B/GSKIP genes, linked to various myeloid neoplasms in families.
  • Among 12 asymptomatic carriers and 52 affected patients, 75% of healthy carriers showed early signs of clonal hematopoiesis primarily due to TET2 mutations.
  • Two clonal expansion routes were identified: one leading to myeloproliferative neoplasms (MPN) driven by TET2 and RAS mutations, and the other to acute myeloid leukemia (AML) without prior MPN, with no DNMT3A mutations found in the cohort.
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The precise diagnosis of an immunodeficiency is sometimes difficult to assess, especially due to the large spectrum of phenotypic variation reported among patients. Common variable immunodeficiency disorders (CVID) do not have, for a large part, an identified genetic cause. The identification of a causal genetic mutation is important to confirm, or in some cases correct, the diagnosis.

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Background: Familial Mediterranean fever (FMF) is an IL-1β-dependent autoinflammatory disease caused by mutations of Mediterranean fever (MEFV) encoding pyrin and characterized by inflammatory attacks induced by physical or psychological stress.

Objective: We investigated the underlying mechanism that links stress-induced inflammatory attacks with neutrophil activation and release of IL-1β-bearing neutrophil extracellular traps (NETs) in patients with FMF.

Methods: RNA sequencing was performed in peripheral neutrophils from 3 patients with FMF isolated both during attacks and remission, 8 patients in remission, and 8 healthy subjects.

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Objective: Hepatocytes are susceptible to FAS-mediated apoptosis. The impact of polymorphisms in the FAS gene on histopathological features of HCV infection was therefore investigated.

Design/methods: Three single-nucleotide polymorphisms in the FAS promoter were assessed in 190 patients with chronic hepatitis C.

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We previously reported that patients homozygous for a specific mutation (M280) in the chemokine receptor CX3CR1 progressed to AIDS more rapidly than those with other genotypes. This deleterious effect would predict that a cohort of prevalent patients would be depleted in M280 carriers, because these patients would have disappeared before recruitment. This hypothesis is confirmed in this new study based on the French SEROCO cohort showing that patients homozygous for the M280 allele were rare among the seroprevalent group.

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We have previously shown that reduced expression of the fractalkine receptor, CX3CR1, is correlated with rapid HIV disease progression and with reduced susceptibility to acute coronary events. In order to elucidate the mechanisms underlying transcriptional regulation of CX3CR1 expression, we structurally and functionally characterized the CX3CR1 gene. It consists of four exons and three introns spanning over 18 kb.

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