Classic ulcerative pyoderma gangrenosum is a T cell-mediated disease targeting follicular adnexal structures: A hypothesis based on molecular and clinicopathologic studies

Elizabeth A. Wang, Andrea Steel, Guillaume Luxardi, Anupam Mitra, Forum Patel, Michelle Y. Cheng, Reason Wilken, Jason Kao, Kristopher de Ga, Hawa Sultani, Alexander A. Merleev, Alina I. Marusina, Alain Brassard, Maxwell A Fung, Thomas Konia, Michiko Shimoda, Emanual Michael Maverakis

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Background: Pyoderma gangrenosum (PG) is a debilitating ulcerative skin disease that is one of the most common associated diseases seen in patients with inflammatory bowel disease and rheumatoid arthritis. Although PG is classified as a neutrophilic dermatosis, its pathophysiology is poorly understood. Objective: Use data obtained from patient-reported histories, immunohistochemistry, and gene expression analysis to formulate a hypothesis on PG pathophysiology. Methods: Ten PG patients participated and answered questions about new ulcer formation. Skin biopsies of healed prior ulcers and adjacent normal skin were obtained from four patients for immunohistochemistry. Scars from healthy patients and patients with discoid lupus were used as additional controls. New onset PG papules were analyzed using immunohistochemistry and gene expression analysis via quantitative real-time PCR. Results: All PG patients reported that healed sites of previous ulceration are refractory to re-ulceration. Simultaneous biopsies of healed and uninvolved skin triggered ulceration only in the latter. On immunohistochemistry, healed PG scars showed complete loss of pilosebaceous units, which were present in normal skin, and to a lesser extent in control scars, and discoid scars. Early PG papules showed perivascular and peripilosebaceous T cell infiltrates, rather than neutrophils. These early inflammatory events were dominated by increased gene expression of CXCL9, CXCL10, CXCL11, IL-8, IL-17, IFNG, and IL-36G and transcription factors consistent with Th1 phenotype. Limitations: Small sample size was the main limitation. Conclusion: We put forth the hypothesis that PG is a T cell response resulting in the destruction of pilosebaceous units.

Original languageEnglish (US)
Article number1980
JournalFrontiers in Immunology
Volume8
Issue numberJAN
DOIs
StatePublished - Jan 15 2018

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Pyoderma Gangrenosum
T-Lymphocytes
Cicatrix
Immunohistochemistry
Skin
Gene Expression
Skin Diseases
Ulcer
Biopsy
Interleukin-17
Interleukin-8
Inflammatory Bowel Diseases
Sample Size
Real-Time Polymerase Chain Reaction
Rheumatoid Arthritis
Neutrophils
Transcription Factors
Phenotype

Keywords

  • Autoimmune
  • CD4
  • Cytokine
  • IL-36G
  • Pathophysiology
  • Pilosebaceous unit
  • Pyoderma gangrenosum
  • T cell

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Cite this

Classic ulcerative pyoderma gangrenosum is a T cell-mediated disease targeting follicular adnexal structures : A hypothesis based on molecular and clinicopathologic studies. / Wang, Elizabeth A.; Steel, Andrea; Luxardi, Guillaume; Mitra, Anupam; Patel, Forum; Cheng, Michelle Y.; Wilken, Reason; Kao, Jason; de Ga, Kristopher; Sultani, Hawa; Merleev, Alexander A.; Marusina, Alina I.; Brassard, Alain; Fung, Maxwell A; Konia, Thomas; Shimoda, Michiko; Maverakis, Emanual Michael.

In: Frontiers in Immunology, Vol. 8, No. JAN, 1980, 15.01.2018.

Research output: Contribution to journalArticle

Wang, Elizabeth A. ; Steel, Andrea ; Luxardi, Guillaume ; Mitra, Anupam ; Patel, Forum ; Cheng, Michelle Y. ; Wilken, Reason ; Kao, Jason ; de Ga, Kristopher ; Sultani, Hawa ; Merleev, Alexander A. ; Marusina, Alina I. ; Brassard, Alain ; Fung, Maxwell A ; Konia, Thomas ; Shimoda, Michiko ; Maverakis, Emanual Michael. / Classic ulcerative pyoderma gangrenosum is a T cell-mediated disease targeting follicular adnexal structures : A hypothesis based on molecular and clinicopathologic studies. In: Frontiers in Immunology. 2018 ; Vol. 8, No. JAN.
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abstract = "Background: Pyoderma gangrenosum (PG) is a debilitating ulcerative skin disease that is one of the most common associated diseases seen in patients with inflammatory bowel disease and rheumatoid arthritis. Although PG is classified as a neutrophilic dermatosis, its pathophysiology is poorly understood. Objective: Use data obtained from patient-reported histories, immunohistochemistry, and gene expression analysis to formulate a hypothesis on PG pathophysiology. Methods: Ten PG patients participated and answered questions about new ulcer formation. Skin biopsies of healed prior ulcers and adjacent normal skin were obtained from four patients for immunohistochemistry. Scars from healthy patients and patients with discoid lupus were used as additional controls. New onset PG papules were analyzed using immunohistochemistry and gene expression analysis via quantitative real-time PCR. Results: All PG patients reported that healed sites of previous ulceration are refractory to re-ulceration. Simultaneous biopsies of healed and uninvolved skin triggered ulceration only in the latter. On immunohistochemistry, healed PG scars showed complete loss of pilosebaceous units, which were present in normal skin, and to a lesser extent in control scars, and discoid scars. Early PG papules showed perivascular and peripilosebaceous T cell infiltrates, rather than neutrophils. These early inflammatory events were dominated by increased gene expression of CXCL9, CXCL10, CXCL11, IL-8, IL-17, IFNG, and IL-36G and transcription factors consistent with Th1 phenotype. Limitations: Small sample size was the main limitation. Conclusion: We put forth the hypothesis that PG is a T cell response resulting in the destruction of pilosebaceous units.",
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AU - Luxardi, Guillaume

AU - Mitra, Anupam

AU - Patel, Forum

AU - Cheng, Michelle Y.

AU - Wilken, Reason

AU - Kao, Jason

AU - de Ga, Kristopher

AU - Sultani, Hawa

AU - Merleev, Alexander A.

AU - Marusina, Alina I.

AU - Brassard, Alain

AU - Fung, Maxwell A

AU - Konia, Thomas

AU - Shimoda, Michiko

AU - Maverakis, Emanual Michael

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N2 - Background: Pyoderma gangrenosum (PG) is a debilitating ulcerative skin disease that is one of the most common associated diseases seen in patients with inflammatory bowel disease and rheumatoid arthritis. Although PG is classified as a neutrophilic dermatosis, its pathophysiology is poorly understood. Objective: Use data obtained from patient-reported histories, immunohistochemistry, and gene expression analysis to formulate a hypothesis on PG pathophysiology. Methods: Ten PG patients participated and answered questions about new ulcer formation. Skin biopsies of healed prior ulcers and adjacent normal skin were obtained from four patients for immunohistochemistry. Scars from healthy patients and patients with discoid lupus were used as additional controls. New onset PG papules were analyzed using immunohistochemistry and gene expression analysis via quantitative real-time PCR. Results: All PG patients reported that healed sites of previous ulceration are refractory to re-ulceration. Simultaneous biopsies of healed and uninvolved skin triggered ulceration only in the latter. On immunohistochemistry, healed PG scars showed complete loss of pilosebaceous units, which were present in normal skin, and to a lesser extent in control scars, and discoid scars. Early PG papules showed perivascular and peripilosebaceous T cell infiltrates, rather than neutrophils. These early inflammatory events were dominated by increased gene expression of CXCL9, CXCL10, CXCL11, IL-8, IL-17, IFNG, and IL-36G and transcription factors consistent with Th1 phenotype. Limitations: Small sample size was the main limitation. Conclusion: We put forth the hypothesis that PG is a T cell response resulting in the destruction of pilosebaceous units.

AB - Background: Pyoderma gangrenosum (PG) is a debilitating ulcerative skin disease that is one of the most common associated diseases seen in patients with inflammatory bowel disease and rheumatoid arthritis. Although PG is classified as a neutrophilic dermatosis, its pathophysiology is poorly understood. Objective: Use data obtained from patient-reported histories, immunohistochemistry, and gene expression analysis to formulate a hypothesis on PG pathophysiology. Methods: Ten PG patients participated and answered questions about new ulcer formation. Skin biopsies of healed prior ulcers and adjacent normal skin were obtained from four patients for immunohistochemistry. Scars from healthy patients and patients with discoid lupus were used as additional controls. New onset PG papules were analyzed using immunohistochemistry and gene expression analysis via quantitative real-time PCR. Results: All PG patients reported that healed sites of previous ulceration are refractory to re-ulceration. Simultaneous biopsies of healed and uninvolved skin triggered ulceration only in the latter. On immunohistochemistry, healed PG scars showed complete loss of pilosebaceous units, which were present in normal skin, and to a lesser extent in control scars, and discoid scars. Early PG papules showed perivascular and peripilosebaceous T cell infiltrates, rather than neutrophils. These early inflammatory events were dominated by increased gene expression of CXCL9, CXCL10, CXCL11, IL-8, IL-17, IFNG, and IL-36G and transcription factors consistent with Th1 phenotype. Limitations: Small sample size was the main limitation. Conclusion: We put forth the hypothesis that PG is a T cell response resulting in the destruction of pilosebaceous units.

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KW - Cytokine

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