Dergi makalesi Açık Erişim

Engineering human stellate cells for beta cell replacement therapy promotes in vivo recruitment of regulatory T cells

Oran, D. C.; Lokumcu, T.; Inceoglu, Y.; Akolpoglu, M. B.; Albayrak, O.; Bal, T.; Kurtoglu, M.; Erkan, M.; Can, F.; Bagci-Onder, T.; Kizilel, S.


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    "creators": [
      {
        "affiliation": "Koc Univ, Biomed Sci & Engn, TR-34450 Istanbul, Turkey", 
        "name": "Oran, D. C."
      }, 
      {
        "affiliation": "Koc Univ, Biomed Sci & Engn, TR-34450 Istanbul, Turkey", 
        "name": "Lokumcu, T."
      }, 
      {
        "affiliation": "Koc Univ, Chem & Biol Engn, TR-34450 Istanbul, Turkey", 
        "name": "Inceoglu, Y."
      }, 
      {
        "affiliation": "Koc Univ, Chem & Biol Engn, TR-34450 Istanbul, Turkey", 
        "name": "Akolpoglu, M. B."
      }, 
      {
        "affiliation": "Koc Univ, Sch Med, Med Microbiol, TR-34450 Istanbul, Turkey", 
        "name": "Albayrak, O."
      }, 
      {
        "affiliation": "Koc Univ, Biomed Sci & Engn, TR-34450 Istanbul, Turkey", 
        "name": "Bal, T."
      }, 
      {
        "name": "Kurtoglu, M."
      }, 
      {
        "name": "Erkan, M."
      }, 
      {
        "name": "Can, F."
      }, 
      {
        "name": "Bagci-Onder, T."
      }, 
      {
        "name": "Kizilel, S."
      }
    ], 
    "description": "Type 1 diabetes (T1D) is an autoimmune disease characterized by destruction of pancreatic beta cells. One of the promising therapeutic approaches in T1D is the transplantation of islets; however, it has serious limitations. To address these limitations, immunotherapeutic strategies have focused on restoring immunologic tolerance, preventing transplanted cell destruction by patients' own immune system. Macrophage-derived chemokines such as chemokine-ligand-22 (CCL22) can be utilized for regulatory T cell (Treg) recruitment and graft tolerance. Stellate cells (SCs) have various immunomodulatory functions: recruitment of Tregs and induction of T-cell apoptosis. Here, we designed a unique immune-privileged microenvironment around implantable islets through overexpression of CCL22 proteins by SCs. We prepared pseudoislets with insulin-secreting mouse insulinoma-6 (MIN6) cells and human SCs as a model to mimic naive islet morphology. Our results demonstrated that transduced SCs can secrete CCL22 and recruit Tregs toward the implantation site in vivo. This study is promising to provide a fundamental understanding of SC-islet interaction and ligand synthesis and transport from SCs at the graft site for ensuring local immune tolerance. Our results also establish a new paradigm for creating tolerable grafts for other chronic diseases such as diabetes, anemia, and central nervous system (CNS) diseases, and advance the science of graft tolerance.", 
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      "title": "MATERIALS TODAY BIO", 
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      "title": "Dergi makalesi", 
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    }, 
    "title": "Engineering human stellate cells for beta cell replacement therapy promotes in vivo recruitment of regulatory T cells"
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