{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,12]],"date-time":"2026-04-12T07:55:24Z","timestamp":1775980524297,"version":"3.50.1"},"reference-count":117,"publisher":"Wiley","issue":"12","license":[{"start":{"date-parts":[[2020,5,27]],"date-time":"2020-05-27T00:00:00Z","timestamp":1590537600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Journal Cellular Physiology"],"published-print":{"date-parts":[[2020,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Chronic venous ulcer (CVU) is a major cause of chronic wounds of lower extremities and presents a significant financial and resource burden to health care systems worldwide. Defects in the vasculature, matrix deposition, and re\u2010epithelialization are the main histopathological changes believed to impede healing. Supplementation of the amino acid arginine that plays a crucial role in the interactions that occur during inflammation and wound healing was proven clinically to improve acute wound healing probably through enhancing activity of inducible arginase (AI) locally in the wounds. However, the possible mechanism of arginine action and the potential beneficial effects of AI\/arginine in human chronic wounds remain unclear. In the present study, using biopsies, taken under local anesthesia, from adult patients (<jats:italic>n<\/jats:italic>\u2009=\u200912, mean age 55 years old) with CVUs in lower extremities, we investigated the correlation between AI distribution in CVUs and the histopathological changes, mainly proliferative and vascular changes. Our results show a distinct spatial distribution of AI along the ulcer in the epidermis and in the dermis with the highest level of expression being at the ulcer edge and the least expression towards the ulcer base. The AI cellular immunoreactivity, enzymatic activity, and protein levels were significantly increased towards the ulcer edge. Interestingly, a similar pattern of expression was encountered in the proliferative and the vascular changes with strong correlations between AI and the proliferative activity and vascular changes. Furthermore, AI cellular distribution was associated with increased proliferative activity, inflammation, and vascular changes. Our findings of differential expression of AI along the CVU base, edge, and nearby surrounding skin and its associations with increased proliferative activity and vascular changes provide further support to the AI implication in CVU pathogenesis. The presence of high levels of AI in the epidermis of chronic wounds may serve as a molecular marker of impaired healing and may provide future targets for therapeutic intervention.<\/jats:p>","DOI":"10.1002\/jcp.29812","type":"journal-article","created":{"date-parts":[[2020,5,27]],"date-time":"2020-05-27T07:41:03Z","timestamp":1590565263000},"page":"9974-9991","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["A possible role for inducible arginase isoform (AI) in the pathogenesis of chronic venous leg ulcer"],"prefix":"10.1002","volume":"235","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7038-7261","authenticated-orcid":false,"given":"Seham A","family":"Abd El\u2010Aleem","sequence":"first","affiliation":[{"name":"Department of Cell Biology University of Manchester  Manchester UK"},{"name":"Department of Histology and cell Biology Minia University  Minia Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8718-3302","authenticated-orcid":false,"given":"Manal Ismail","family":"Abd\u2010Elghany","sequence":"additional","affiliation":[{"name":"Department of Pathology Minia University  Minya Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6651-0463","authenticated-orcid":false,"given":"Entesar","family":"Ali Saber","sequence":"additional","affiliation":[{"name":"Department of Histology and cell Biology Minia University  Minia Egypt"},{"name":"Department of Histology Deraya University  New Minia Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3186-4122","authenticated-orcid":false,"given":"Edward B.","family":"Jude","sequence":"additional","affiliation":[{"name":"Department of Cell Biology University of Manchester  Manchester UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8730-9470","authenticated-orcid":false,"given":"Laiche","family":"Djouhri","sequence":"additional","affiliation":[{"name":"Department of Physiology, College of Medicine (QU Health) Qatar University  Doha Qatar"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,5,27]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/jcp.28930"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/path.992"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1002\/1096\u20109896(2000)9999:9999<::AID\u2010PATH654>3.0.CO;2\u2010S"},{"issue":"3","key":"e_1_2_11_5_1","first-page":"265","article-title":"Spatial distribution of mast cells in chronic venous leg ulcers","volume":"49","author":"Abd\u2010El\u2010Aleem S. 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