Abstract
Background
The term pustular psoriasis indicates a group of severe skin disorders characterised by eruptions of neutrophil-filled pustules. The disease, which often manifests with concurrent psoriasis vulgaris (PV), can have an acute systemic (generalised pustular psoriasis, GPP) or chronic localised presentation (palmoplantar pustulosis, PPP; acrodermatitis continua of Hallopeau, ACH). While mutations have been uncovered in IL36RN and AP1S3, the rarity of the disease has hindered the study of genotype-phenotype correlations.ObjectiveWe sought to characterise clinical and genetic features of pustular psoriasis through the analysis of an extended patient cohort.MethodsWe ascertained a dataset of unprecedented size, including 863 unrelated patients (251 GPP, 560 PPP, 28 ACH, 24 multiple diagnoses). We undertook mutation screening in 473 cases.ResultsPV concurrence was lowest in PPP (15.8% vs. 54.4% in GPP and 46.2% in ACH, P<0.0005 for both), whereas mean age of onset was earliest in GPP (31.0 years vs. 43.7 in PPP and 51.8 in ACH, P<0.0001 for both). The percentage of females was higher in PPP (77.0%) than GPP (62.5%) (P=5.8x10-5). The same applied to the prevalence of smokers (79.8% vs 28.3%, P<10-15). While AP1S3 alleles had similar frequency (0.03-0.05) across disease subtypes, IL36RN mutations were less common in PPP (0.03) than GPP (0.19) and ACH (0.16) (P=1.9x10-14 and 0.002, respectively). Importantly, IL36RN disease alleles had a dose-dependent effect on age of onset, in all forms of pustular psoriasis (P=0.003).ConclusionsThe analysis of an unparalleled patient resource revealed key clinical and genetic differences between PPP and GPP.
The term pustular psoriasis indicates a group of severe skin disorders characterised by eruptions of neutrophil-filled pustules. The disease, which often manifests with concurrent psoriasis vulgaris (PV), can have an acute systemic (generalised pustular psoriasis, GPP) or chronic localised presentation (palmoplantar pustulosis, PPP; acrodermatitis continua of Hallopeau, ACH). While mutations have been uncovered in IL36RN and AP1S3, the rarity of the disease has hindered the study of genotype-phenotype correlations.ObjectiveWe sought to characterise clinical and genetic features of pustular psoriasis through the analysis of an extended patient cohort.MethodsWe ascertained a dataset of unprecedented size, including 863 unrelated patients (251 GPP, 560 PPP, 28 ACH, 24 multiple diagnoses). We undertook mutation screening in 473 cases.ResultsPV concurrence was lowest in PPP (15.8% vs. 54.4% in GPP and 46.2% in ACH, P<0.0005 for both), whereas mean age of onset was earliest in GPP (31.0 years vs. 43.7 in PPP and 51.8 in ACH, P<0.0001 for both). The percentage of females was higher in PPP (77.0%) than GPP (62.5%) (P=5.8x10-5). The same applied to the prevalence of smokers (79.8% vs 28.3%, P<10-15). While AP1S3 alleles had similar frequency (0.03-0.05) across disease subtypes, IL36RN mutations were less common in PPP (0.03) than GPP (0.19) and ACH (0.16) (P=1.9x10-14 and 0.002, respectively). Importantly, IL36RN disease alleles had a dose-dependent effect on age of onset, in all forms of pustular psoriasis (P=0.003).ConclusionsThe analysis of an unparalleled patient resource revealed key clinical and genetic differences between PPP and GPP.
| Original language | English |
|---|---|
| Pages (from-to) | 1021-1026 |
| Journal | Journal of Allergy and Clinical Immunology |
| Volume | 143 |
| Issue number | 3 |
| Early online date | 21 Jul 2018 |
| DOIs | |
| Publication status | Published - 31 Jul 2018 |
Keywords
- Generalised pustular psoriasis
- palmoplantar pustulosis
- acrodermatitis continua of Hallopeau
- genotype-phenotype correlation