{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T03:30:11Z","timestamp":1760239811784,"version":"build-2065373602"},"reference-count":50,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2020,12,31]],"date-time":"2020-12-31T00:00:00Z","timestamp":1609372800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"King Abdulaziz City of Science and Technology","award":["12-BIO2343-20-R"],"award-info":[{"award-number":["12-BIO2343-20-R"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Osteopetrosis is a hereditary disorder characterized by sclerotic, thick, weak, and brittle bone. The biological behavior of mesenchymal cells obtained from osteopetrosis patients has not been well-studied. Isolated mesenchymal stem\/stromal cells from dental pulp (DP-MSSCs) of recently extracted deciduous teeth from osteopetrosis (OP) patients and healthy controls (HCs) were compared. We evaluated whether the dental pulp of OP patients has a population of MSSCs with similar multilineage differentiation capability to DP-MSSCs of healthy subjects. Stem\/progenitor cells were characterized using immunohistochemistry, flow cytometry, and proteomics. Our DP-MSSCs were strongly positive for CD44, CD73, CD105, and CD90. DP-MSSCs obtained from HC subjects and OP patients showed similar patterns of proliferation and differentiation as well as gene expression. Proteomic analysis identified 1499 unique proteins with 94.3% similarity in global protein fingerprints of HCs and OP patients. Interestingly, we observed subtle differences in expressed proteins of osteopetrosis disease-related in pathways, including MAPK, ERK 1\/2, PI3K, and integrin, rather than in the stem cell signaling network. Our findings of similar protein expression signatures in DP-MSSCs of HC and OP patients are of paramount interest, and further in vivo validation study is needed. There is the possibility that OP patients could have their exfoliating deciduous teeth banked for future use in regenerative dentistry.<\/jats:p>","DOI":"10.3390\/ijms22010380","type":"journal-article","created":{"date-parts":[[2020,12,31]],"date-time":"2020-12-31T14:31:49Z","timestamp":1609425109000},"page":"380","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["Proteomic Profiling of the First Human Dental Pulp Mesenchymal Stem\/Stromal Cells from Carbonic Anhydrase II Deficiency Osteopetrosis Patients"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2742-2812","authenticated-orcid":false,"given":"Zikra","family":"Alkhayal","sequence":"first","affiliation":[{"name":"Therapeutics &amp; Biomarker Discovery for Clinical Applications, Stem Cell &amp; Tissue Re-Engineering Program, King Faisal Specialist Hospital and Research Centre, P.O. Box 3354, Riyadh 11211, Saudi Arabia"},{"name":"Department of Dentistry, King Faisal Specialist Hospital &amp; Research Center, P.O. Box 3354, Riyadh 11211, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zakia","family":"Shinwari","sequence":"additional","affiliation":[{"name":"Therapeutics &amp; Biomarker Discovery for Clinical Applications, Stem Cell &amp; Tissue Re-Engineering Program, King Faisal Specialist Hospital and Research Centre, P.O. Box 3354, Riyadh 11211, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8009-7962","authenticated-orcid":false,"given":"Ameera","family":"Gaafar","sequence":"additional","affiliation":[{"name":"Therapeutics &amp; Biomarker Discovery for Clinical Applications, Stem Cell &amp; Tissue Re-Engineering Program, King Faisal Specialist Hospital and Research Centre, P.O. Box 3354, Riyadh 11211, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2124-8550","authenticated-orcid":false,"given":"Ayodele","family":"Alaiya","sequence":"additional","affiliation":[{"name":"Therapeutics &amp; Biomarker Discovery for Clinical Applications, Stem Cell &amp; Tissue Re-Engineering Program, King Faisal Specialist Hospital and Research Centre, P.O. Box 3354, Riyadh 11211, Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2020,12,31]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"85","DOI":"10.3389\/fendo.2019.00085","article-title":"One Disease, Many Genes: Implications for the Treatment of Osteopetroses","volume":"10","author":"Penna","year":"2019","journal-title":"Front. 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