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Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Homo sapiens

PROVIDER: GSE184877 | GEO | 2021/11/03

REPOSITORIES: GEO

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Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease [T cells]

Project description:We report a pleiotropic disease due to loss-of-function mutations in RHBDF2, the gene encoding iRHOM2, in 2 kindreds with recurrent infections in different organs. One patient had recurrent pneumonia but no colon involvement, another had recurrent infectious hemorrhagic colitis but no lung involvement, and the other two experienced recurrent respiratory infections. Loss of iRHOM2, a rhomboid superfamily member that regulates the ADAM17 metalloproteinase, caused defective ADAM17-dependent cleavage and release of cytokines, including TNF and amphiregulin. To understand the diverse clinical phenotypes, we challenged Rhbdf2-/- mice with Pseudomonas aeruginosa by nasal gavage and observed more severe pneumonia whereas infection with Citrobacter rodentium caused worse inflammatory colitis than wild-type mice. The fecal microbiota in the colitis patient had characteristic oral species that can predispose to colitis. Thus, a new human immunodeficiency arising from iRHOM2 deficiency causes divergent disease phenotypes that can involve the local microbial environment.

2021-11-03 | GSE184875 | GEO

Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease [whole blood]

2021-11-03 | GSE184876 | GEO

Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease

Project description:Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease

| PRJNA766689 | ENA

Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease [T cells]

Project description:Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease [T cells]

| PRJNA766691 | ENA

Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease [whole blood]

Project description:Congenital iRHOM2 deficiency causes ADAM17 dysfunction and environmentally directed immunodysregulatory disease [whole blood]

| PRJNA766692 | ENA

iRHOM2 deficiency causes environmentally directed immunodysregulatory disease

Project description:iRHOM2 deficiency causes environmentally directed immunodysregulatory disease

| PRJNA741289 | ENA

iRHOM2 deficiency causes environmentally directed immunodysregulatory disease

Project description:iRHOM2 deficiency causes environmentally directed immunodysregulatory disease

| PRJNA741290 | ENA

iRHOM2-dependent regulation of ADAM17 in cutaneous disease and epidermal barrier function.

Project description:iRHOM2 is a highly conserved, catalytically inactive member of the Rhomboid family, which has recently been shown to regulate the maturation of the multi-substrate ectodomain sheddase enzyme ADAM17 (TACE) in macrophages. Dominant iRHOM2 mutations are the cause of the inherited cutaneous and oesophageal cancer-susceptibility syndrome tylosis with oesophageal cancer (TOC), suggesting a role for this protein in epithelial cells. Here, using tissues derived from TOC patients, we demonstrate that TOC-associated mutations in iRHOM2 cause an increase in the maturation and activity of ADAM17 in epidermal keratinocytes, resulting in significantly upregulated shedding of ADAM17 substrates, including EGF-family growth factors and pro-inflammatory cytokines. This activity is accompanied by increased EGFR activity, increased desmosome processing and the presence of immature epidermal desmosomes, upregulated epidermal transglutaminase activity and heightened resistance to Staphylococcal infection in TOC keratinocytes. Many of these features are consistent with the presence of a constitutive wound-healing-like phenotype in TOC epidermis, which may shed light on a novel pathway in skin repair, regeneration and inflammation.

| S-EPMC4110483 | biostudies-literature

Astrocytic dysfunction induced by ABCA1 deficiency causes optic neuropathy

Project description:This SuperSeries is composed of the SubSeries listed below.

2022-07-11 | GSE207930 | GEO

iRhom2 controls the substrate selectivity of stimulated ADAM17-dependent ectodomain shedding.

Project description:Protein ectodomain shedding by ADAM17 (a disintegrin and metalloprotease 17), a principal regulator of EGF-receptor signaling and TNFα release, is rapidly and posttranslationally activated by a variety of signaling pathways, and yet little is known about the underlying mechanism. Here, we report that inactive rhomboid protein 2 (iRhom2), recently identified as essential for the maturation of ADAM17 in hematopoietic cells, is crucial for the rapid activation of the shedding of some, but not all substrates of ADAM17. Mature ADAM17 is present in mouse embryonic fibroblasts (mEFs) lacking iRhom2, and yet ADAM17 is unable to support stimulated shedding of several of its substrates, including heparin-binding EGF and Kit ligand 2 in this context. Stimulated shedding of other ADAM17 substrates, such as TGFα, is not affected in iRhom2(-/-) mEFs but can be strongly reduced by treating iRhom2(-/-) mEFs with siRNA against iRhom1. Activation of heparin-binding EGF or Kit ligand 2 shedding by ADAM17 in iRhom2(-/-) mEFs can be rescued by wild-type iRhom2 but not by iRhom2 lacking its N-terminal cytoplasmic domain. The requirement for the cytoplasmic domain of iRhom2 for stimulated shedding by ADAM17 may help explain why the cytoplasmic domain of ADAM17 is not required for stimulated shedding. The functional relevance of iRhom2 in regulating shedding of EGF receptor (EGFR) ligands is established by a lack of lysophasphatidic acid/ADAM17/EGFR-dependent crosstalk with ERK1/2 in iRhom2(-/-) mEFs, and a significant reduction of FGF7/ADAM17/EGFR-stimulated migration of iRhom2(-/-) keratinocytes. Taken together, these findings uncover functions for iRhom2 in the regulation of EGFR signaling and in controlling the activation and substrate selectivity of ADAM17-dependent shedding events.

| S-EPMC3710827 | biostudies-literature

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