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2015 ; 212
(6
): 939-51
Nephropedia Template TP
gab.com Text
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Human HOIP and LUBAC deficiency underlies autoinflammation, immunodeficiency,
amylopectinosis, and lymphangiectasia
#MMPMID26008899
Boisson B
; Laplantine E
; Dobbs K
; Cobat A
; Tarantino N
; Hazen M
; Lidov HG
; Hopkins G
; Du L
; Belkadi A
; Chrabieh M
; Itan Y
; Picard C
; Fournet JC
; Eibel H
; Tsitsikov E
; Pai SY
; Abel L
; Al-Herz W
; Casanova JL
; Israel A
; Notarangelo LD
J Exp Med
2015[Jun]; 212
(6
): 939-51
PMID26008899
show ga
Inherited, complete deficiency of human HOIL-1, a component of the linear
ubiquitination chain assembly complex (LUBAC), underlies autoinflammation,
infections, and amylopectinosis. We report the clinical description and molecular
analysis of a novel inherited disorder of the human LUBAC complex. A patient with
multiorgan autoinflammation, combined immunodeficiency, subclinical
amylopectinosis, and systemic lymphangiectasia, is homozygous for a mutation in
HOIP, the gene encoding the catalytic component of LUBAC. The missense allele
(L72P, in the PUB domain) is at least severely hypomorphic, as it impairs HOIP
expression and destabilizes the whole LUBAC complex. Linear ubiquitination and
NF-?B activation are impaired in the patient's fibroblasts stimulated by IL-1? or
TNF. In contrast, the patient's monocytes respond to IL-1? more vigorously than
control monocytes. However, the activation and differentiation of the patient's B
cells are impaired in response to CD40 engagement. These cellular and clinical
phenotypes largely overlap those of HOIL-1-deficient patients. Clinical
differences between HOIL-1- and HOIP-mutated patients may result from differences
between the mutations, the loci, or other factors. Our findings show that human
HOIP is essential for the assembly and function of LUBAC and for various
processes governing inflammation and immunity in both hematopoietic and
nonhematopoietic cells.
|*Gene Expression Regulation
[MESH]
|Alleles
[MESH]
|Amino Acid Sequence
[MESH]
|CD40 Ligand/metabolism
[MESH]
|Catalysis
[MESH]
|Female
[MESH]
|Fibroblasts/metabolism
[MESH]
|Genetic Complementation Test
[MESH]
|Germ-Line Mutation
[MESH]
|Glycogen Storage Disease Type IV/pathology
[MESH]