Abstract
Pancreatic dysfunction during diabetes is linked to the induction of endoplasmic reticulum (ER) stress on pancreatic beta (β) cells. Our laboratory recently discovered that p21 protects from diabetes by modifying the outcome of ER stress response. In the present study, we explored the antidiabetic activity of ciclopirox (CPX), an iron chelator and recently described activator of p21 expression. The effects of CPX in beta cell survival and function were assessed in cultured islets in vitro as well as in diabetic mice in vivo. The consequences of CPX in high glucose-induced insulin release and reactive oxygen species (ROS) production were also evaluated. Islet survival assays confirmed the significance of p21 in the regulation of glucotoxicity and suggested that CPX counteracts glucotoxicity in a manner that depends on p21. In vivo, administration of CPX in wild-type (WT) diabetic mice restored glucose homeostasis. In WT-cultured islets, CPX suppressed the expression of ER stress markers BiP, GRP94, and CHOP and reduced the levels of ROS during culture at high glucose. This reduction of ER stress may be associated with the ability of CPX to inhibit insulin release. Iron citrate stimulated insulin release, which was inhibited by CPX that functions as an iron chelator. It is conceivable that inhibition of insulin production constrains ER stress in islets promoting their survival and thus protecting from diabetes in vivo. This unfolded protein response (UPR)-antagonizing activity of CPX suggests application for the management not only of diabetes but also of other conditions related to ER stress.
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References
Back SH, Kaufman RJ (2012) Endoplasmic reticulum stress and type 2 diabetes. Annu Rev Biochem 81:767–793
Blagosklonny MV (2002) Are p27 and p21 cytoplasmic oncoproteins? Cell Cycle 1:391–393
Cheng K, Ho K, Stokes R, Scott C, Lau SM, Hawthorne WJ et al (2010) Hypoxia-inducible factor-1alpha regulates beta cell function in mouse and human islets. J Clin Invest 120:2171–2183
Dioufa N, Chatzistamou I, Farmaki E, Papavassiliou AG, Kiaris H (2012) P53 antagonizes the unfolded protein response and inhibits ground glass hepatocyte development during endoplasmic reticulum stress. Exp Biol Med (Maywood, NJ) 237:1173–1180
Erion KA, Ferrante T, Corkey B, Deeney J (2013) Iron stimulates insulin secretion in clonal pancreatic β-cells and dissociated rat islets. FASEB J 27:1010.13
Han J, Song B, Kim J, Kodali VK, Pottekat A, Wang M, Hassler J, Wang S, Pennathur S, Back SH, Katze MG, Kaufman RJ (2015) Antioxidants complement the requirement for protein chaperone function to maintain β-cell function and glucose homeostasis. Diabetes 62:2892–2904
Henquin JC, Mourad NI, Nenquin M (2012) Disruption and stabilization of β-cell actin microfilaments differently influence insulin secretion triggered by intracellular Ca2+ mobilization or store-operated Ca2+ entry. FEBS Lett 586:89–95. doi:10.1016/j.febslet.2011.11.030
Hernandez AM, Colvin ES, Chen YC, Geiss SL, Eller LE, Fueger PT (2013) Upregulation of p21 activates the intrinsic apoptotic pathway in β-cells. Am J Physiol Endocrinol Metab 304:E1281–E1290
Huang J, Jones D, Luo B, Sanderson M, Soto J, Abel ED et al (2011) Iron overload and diabetes risk: a shift from glucose to fatty acid oxidation and increased hepatic glucose production in a mouse model of hereditary hemochromatosis. Diabetes 60:80–87
Li D-S, Yuan Y-H, Tu H-J, Liang Q-L, Dai L-J (2009) A protocol for islet isolation from mouse pancreas. Nat Protoc 4:1649–1652
Linden T, Katschinski DM, Eckhardt K, Scheid A, Pagel H, Wenger RH (2003) The antimycotic ciclopirox olamine induces HIF-1alpha stability, VEGF expression, and angiogenesis., The FASEB Journal : Official Publication of the Federation of American Societies for. Exp Biol 17:761–763
Ma TC, Langley B, Ko B, Wei N, Gazaryan IG, Zareen N, Yamashiro DJ, Willis DE, Ratan RR (2013) A screen for inducers of p21waf1/cip1 identifies HIF prolyl hydroxylase inhibitors as neuroprotective agents with antitumor properties. Neurobiol Dis 49:13–21
Malhotra JD, Miao H, Zhang K, Wolfson A, Pennathur S, Pipe SW, Kaufman RJ (2008) Antioxidants reduce endoplasmic reticulum stress and improve protein secretion. Proc Natl Acad Sci U S A 105:18525–18530
Mihailidou C, Papazian I, Papavassiliou AG, Kiaris H (2010) CHOP-dependent regulation of p21/waf1 during ER stress. Cell Physiol Biochem 25:761–766
Mihailidou C, Chatzistamou I, Papavassiliou A, Kiaris H (2015a) Improvement of chemotherapeutic drug efficacy by endoplasmic reticulum stress. Endocr Relat Cancer 22(2):229–238
Mihailidou C, Chatzistamou I, Papavassiliou AG, Kiaris H (2015b) Regulation of P21 during diabetes-associated stress of the endoplasmic reticulum. Endocr Relat Cancer 22:217–228
Minden MD, Hogge DE, Weir SJ, Kasper J, Webster DA, Patton L et al (2014) Oral ciclopirox olamine displays biological activity in a phase I study in patients with advanced hematologic malignancies. Am J Hematol 89:363–368
Mkrtchian S (2015) Targeting unfolded protein response in cancer and diabetes. Endocr Relat Cancer. 22(3):C1–C4. doi:10.1530/ERC-15-0106
Mlynarczyk C, Fåhraeus R (2014) Endoplasmic reticulum stress sensitizes cells to DNA damage-induced apoptosis through p53-dependent suppression of p21(CDKN1A. Nat Commun 5:5067
Olofsson CS, Göpel SO, Barg S, Galvanovskis J, Ma X, Salehi A, Rorsman P, Eliasson L (2002) Fast insulin secretion reflects exocytosis of docked granules in mouse pancreatic B-cells. Pflugers Arch 444:43–51
Papa FR (2012) Endoplasmic reticulum stress, pancreatic β-cell degeneration, and diabetes. Cold Spring Harbor Perspectives in Medicine 2:1–17
Pi J, Bai Y, Zhang Q, Wong V, Floering LM, Daniel K et al (2007) Reactive oxygen species as a signal in glucose-stimulated insulin secretion. Diabetes 56:1783–1791
Pizarro-Delgado J, Braun M, Hernández-Fisac I, Martin-del-Río R, Tamarit-Rodriguez J (2010) Glucose promotion of GABA metabolism contributes to the stimulation of insulin secretion in β-cells. Biochem J 431:381–389. doi:10.1042/BJ20100714
Pizarro-Delgado J, Deeney JT, Martín-del-Río R, Corkey BE, Tamarit-Rodriguez J (2015) KCl-permeabilized pancreatic islets: an experimental model to explore the messenger role of ATP in the mechanism of insulin secretion. PLoS One 10:e0140096. doi:10.1371/journal.pone.0140096
Porter DC, Farmaki E, Altilia S, Schools GP, West DK, Chen M, Chang BD, Puzyrev AT, Lim CU, Rokow-Kittell R, Friedhoff LT, Papavassiliou AG, Kalurupalle S, Hurteau G, Shi J, Baran PS, Gyorffy B, Wentland MP, Broude EV, Kiaris H, Roninson IB (2012) Cyclin-dependent kinase 8 mediates chemotherapy-induced tumor-promoting paracrine activities. Proc Natl Acad Sci U S A 109:13799–13804
Roninson IB (2002) Oncogenic functions of tumour suppressor p21(Waf1/Cip1/Sdi1): association with cell senescence and tumour-promoting activities of stromal fibroblasts. Cancer Lett 179:1–14
Saadeh M, Ferrante TC, Kane A, Shirihai O, Corkey BE, Deeney JT (2012) Reactive oxygen species stimulate insulin secretion in rat pancreatic islets: studies using mono-oleoyl-glycerol. PLoS One 7:e30200
Sato E, Kohno M, Nakashima T, Niwano Y (2008) Ciclopirox olamine directly scavenges hydroxyl radical. Int J Dermatol 47:15–18
Schubert U, Schmid J, Lehmann S et al (2013) Transplantation of pancreatic islets to adrenal gland is promoted by agonists of growth-hormone-releasing hormone. Proc Natl Acad Sci U S A 110:2288–2293
Secchiero P, Toffoli B, Melloni E, Agnoletto C, Monasta L, Zauli G (2013) The MDM2 inhibitor Nutlin-3 attenuates streptozotocin-induced diabetes mellitus and increases serum level of IL-12p40. Acta Diabetol 50:899–906
Simcox JA, McClain DA (2013a) Iron and diabetes risk. Cell Metab 17:329–341. doi:10.1016/j.cmet.2013.02.007
Simcox JA, McClain DA (2013b) Iron and diabetes risk. Cell Metab 17(3):329–341
Swaminathan S, Fonseca V, Alam M, Shah SV. S (2007) The role of iron in diabetes and its complications. Diabetes Care 30:1926–1933
Vassilev LT, Vu BT, Graves B, Carvajal D, Podlaski F, Filipovic Z et al (2004) In vivo activation of the p53 pathway by small-molecule antagonists of MDM2. Science (New York, NY) 303:844–848
Wanner RM, Spielmann P, Stroka DM, Camenisch G, Camenisch I, Scheid A et al (2000) Epolones induce erythropoietin expression via hypoxia-inducible factor-1 alpha activation. Blood 96:1558–1565
Weiss RH (2003) p21Waf1/Cip1 as a therapeutic target in breast and other cancers. Cancer Cell 4:425–429
Yang J, Zhang W, Jiang W, Sun X, Han Y, Ding M et al (2009) P21cip-overexpression in the mouse beta cells leads to the improved recovery from streptozotocin-induced diabetes. PLoS One 4:e8344
Yu T, Jhun BS, Yoon Y (2011) High-glucose stimulation increases reactive oxygen species production through the calcium and mitogen-activated protein kinase-mediated activation of mitochondrial fission. Antioxid Redox Signal 14:425–437
Zhou H, Shen T, Luo Y, Liu L, Chen W, Xu B et al (2010) The antitumor activity of the fungicide ciclopirox. Int J Cancer J Int Du Cancer 127:2467–2477
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This study was supported by grant RAG051976A from NIH/NIA.
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Animal care and experiments were carried out in accordance with the guidelines of the Animal Facilities by the Athens University Medical School Ethics Committee in agreement with the European Union (approval no. 7924 /12/12/2014).
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Mihailidou, C., Chatzistamou, I., Papavassiliou, A.G. et al. Ciclopirox enhances pancreatic islet health by modulating the unfolded protein response in diabetes. Pflugers Arch - Eur J Physiol 468, 1957–1968 (2016). https://doi.org/10.1007/s00424-016-1887-5
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DOI: https://doi.org/10.1007/s00424-016-1887-5