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Mateus Gonçalves L, Andrade Barboza C, Almaça J. Diabetes as a Pancreatic Microvascular Disease-A Pericytic Perspective. J Histochem Cytochem 2024; 72:131-148. [PMID: 38454609 PMCID: PMC10956440 DOI: 10.1369/00221554241236535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 02/09/2024] [Indexed: 03/09/2024] Open
Abstract
Diabetes is not only an endocrine but also a vascular disease. Vascular defects are usually seen as consequence of diabetes. However, at the level of the pancreatic islet, vascular alterations have been described before symptom onset. Importantly, the cellular and molecular mechanisms underlying these early vascular defects have not been identified, neither how these could impact the function of islet endocrine cells. In this review, we will discuss the possibility that dysfunction of the mural cells of the microvasculature-known as pericytes-underlies vascular defects observed in islets in pre-symptomatic stages. Pericytes are crucial for vascular homeostasis throughout the body, but their physiological and pathophysiological functions in islets have only recently started to be explored. A previous study had already raised interest in the "microvascular" approach to this disease. With our increased understanding of the crucial role of the islet microvasculature for glucose homeostasis, here we will revisit the vascular aspects of islet function and how their deregulation could contribute to diabetes pathogenesis, focusing in particular on type 1 diabetes (T1D).
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Affiliation(s)
- Luciana Mateus Gonçalves
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida
| | - Catarina Andrade Barboza
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida
| | - Joana Almaça
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, University of Miami Miller School of Medicine, Miami, Florida
- Department of Physiology and Biophysics, University of Miami Miller School of Medicine, Miami, Florida
- Molecular and Cellular Pharmacology Graduate Program, University of Miami Miller School of Medicine, Miami, Florida
- Diabetes Research Institute, University of Miami Miller School of Medicine, Miami, Florida
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Clemente-Casares X, Santamaria P. Nanomedicine in autoimmunity. Immunol Lett 2014; 158:167-74. [PMID: 24406504 DOI: 10.1016/j.imlet.2013.12.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Revised: 12/09/2013] [Accepted: 12/20/2013] [Indexed: 11/15/2022]
Abstract
The application of nanotechnology to the diagnosis and therapy of human diseases is already a reality and is causing a real revolution in how we design new therapies and vaccines. In this review we focus on the applications of nanotechnology in the field of autoimmunity. First, we review scenarios in which iron oxide nanoparticles have been used in the diagnosis of autoimmune diseases, mostly through magnetic resonance imaging (MRI), both in animal models and patients. Second, we discuss the potential of nanoparticles as an immunotherapeutic platform for autoimmune diseases, for now exclusively in pre-clinical models. Finally, we discuss the potential of this field to generate the 'perfect drug' with the capacity to report on its therapeutic efficacy in real time, that is, the birth of theranostics in autoimmunity.
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Affiliation(s)
- Xavier Clemente-Casares
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Pere Santamaria
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases, Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada; Institut D'Investigacions Biomediques August Pi i Sunyer, Barcelona, Spain.
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Tang SC, Chiu YC, Hsu CT, Peng SJ, Fu YY. Plasticity of Schwann cells and pericytes in response to islet injury in mice. Diabetologia 2013; 56:2424-34. [PMID: 23801221 DOI: 10.1007/s00125-013-2977-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 06/11/2013] [Indexed: 01/28/2023]
Abstract
AIMS/HYPOTHESIS Islet Schwann (glial) cells and pericytes are the microorgan's accessory cells positioned at the external and internal boundaries facing the exocrine pancreas and endothelium, respectively, adjacent to the endocrine cells. Plasticity of glial cells and pericytes is shown in the glial scar formation after injury to the central nervous system. It remains unclear whether similar reactive cellular responses occur in insulitis. We applied three-dimensional (3D) histology to perform qualitative and quantitative analyses of the islet Schwann cell network and pericytes in normal, streptozotocin-injected (positive control of gliosis) and NOD mouse models. METHODS Vessel painting paired with immunostaining of mouse pancreatic tissue was used to reveal the islet Schwann cells and pericytes and their association with vasculature. Transparent islet specimens were prepared by optical clearing to facilitate 3D confocal microscopy for panoramic visualisation of the tissue networks. RESULTS In-depth microscopy showed that the islet Schwann cell network extends from the peri-islet domain into the core. One week after streptozotocin injection, we observed intra-islet perivascular gliosis and an increase in pericyte density. In early/moderate insulitis in the NOD mice, perilesional gliosis occurred at the front of the lymphocytic infiltration with atypical islet Schwann cell morphologies, including excessive branching and perivascular gliosis. Meanwhile, pericytes aggregated on the walls of the feeding arteriole at the peri- and intralesional domains with a marked increase in surface marker density. CONCLUSIONS/INTERPRETATION The reactive cellular responses demonstrate plasticity and suggest a stop-gap mechanism consisting of the Schwann cells and pericytes in association with the islet lesion and vasculature when injury occurs.
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Affiliation(s)
- Shiue-Cheng Tang
- Connectomics Research Center, National Tsing Hua University, Hsinchu, Taiwan,
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Early window of diabetes determinism in NOD mice, dependent on the complement receptor CRIg, identified by noninvasive imaging. Nat Immunol 2012; 13:361-8. [PMID: 22366893 PMCID: PMC3309063 DOI: 10.1038/ni.2233] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 01/11/2012] [Indexed: 12/13/2022]
Abstract
All juvenile NOD mice exhibit insulitis, but there is substantial variation in their progression to diabetes. We demonstrate that a patient-validated magnetic-resonance-imaging (MRI) strategy to non-invasively visualize local effects of pancreatic-islet inflammation can predict diabetes onset in NOD mice. MRI signals acquired during a narrow early time-window allowed pre-sorting into disease-progressors and -nonprogressors and an estimate of time-to-diabetes. We exploited this capability to identify novel elements correlated with disease protection, including CRIg (complement receptor of the immunoglobulin superfamily), which marked a subset of macrophages associated with diabetes resistance. Administration of CRIg-Fc depressed MRI signals and diabetes incidence. In addition to identifying regulators of disease progression, this study shows that diabetes is set at an early age in NOD mice.
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Dynamics of extracellular matrix in ovarian follicles and corpora lutea of mice. Cell Tissue Res 2009; 339:613-24. [PMID: 20033213 PMCID: PMC2831189 DOI: 10.1007/s00441-009-0905-8] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2009] [Accepted: 11/02/2009] [Indexed: 01/15/2023]
Abstract
Despite the mouse being an important laboratory species, little is known about changes in its extracellular matrix (ECM) during follicle and corpora lutea formation and regression. Follicle development was induced in mice (29 days of age/experimental day 0) by injections of pregnant mare’s serum gonadotrophin on days 0 and 1 and ovulation was induced by injection of human chorionic gonadotrophin on day 2. Ovaries were collected for immunohistochemistry (n=10 per group) on days 0, 2 and 5. Another group was mated and ovaries were examined on day 11 (n=7). Collagen type IV α1 and α2, laminin α1, β1 and γ1 chains, nidogens 1 and 2 and perlecan were present in the follicular basal lamina of all developmental stages. Collagen type XVIII was only found in basal lamina of primordial, primary and some preantral follicles, whereas laminin α2 was only detected in some preantral and antral follicles. The focimatrix, a specialised matrix of the membrana granulosa, contained collagen type IV α1 and α2, laminin α1, β1 and γ1 chains, nidogens 1 and 2, perlecan and collagen type XVIII. In the corpora lutea, staining was restricted to capillary sub-endothelial basal laminas containing collagen type IV α1 and α2, laminin α1, β1 and γ1 chains, nidogens 1 and 2, perlecan and collagen type XVIII. Laminins α4 and α5 were not immunolocalised to any structure in the mouse ovary. The ECM composition of the mouse ovary has similarities to, but also major differences from, other species with respect to nidogens 1 and 2 and perlecan.
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Irving-Rodgers HF, Ziolkowski AF, Parish CR, Sado Y, Ninomiya Y, Simeonovic CJ, Rodgers RJ. Molecular composition of the peri-islet basement membrane in NOD mice: a barrier against destructive insulitis. Diabetologia 2008; 51:1680-8. [PMID: 18633594 PMCID: PMC2516190 DOI: 10.1007/s00125-008-1085-x] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2008] [Accepted: 05/19/2008] [Indexed: 12/13/2022]
Abstract
AIMS/HYPOTHESIS This study examined whether the capsule which encases islets of Langerhans in the NOD mouse pancreas represents a specialised extracellular matrix (ECM) or basement membrane that protects islets from autoimmune attack. METHODS Immunofluorescence microscopy using a panel of antibodies to collagens type IV, laminins, nidogens and perlecan was performed to localise matrix components in NOD mouse pancreas before diabetes onset, at onset of diabetes and after clinical diabetes was established (2-8.5 weeks post-onset). RESULTS Perlecan, a heparan sulphate proteoglycan that is characteristic of basement membranes and has not previously been investigated in islets, was localised in the peri-islet capsule and surrounding intra-islet capillaries. Other components present in the peri-islet capsule included laminin chains alpha2, beta1 and gamma1, collagen type IV alpha1 and alpha2, and nidogen 1 and 2. Collagen type IV alpha3-alpha6 were not detected. These findings confirm that the peri-islet capsule represents a specialised ECM or conventional basement membrane. The islet basement membrane was destroyed in islets where intra-islet infiltration of leucocytes marked the progression from non-destructive to destructive insulitis. No changes in basement membrane composition were observed before leucocyte infiltration. CONCLUSIONS/INTERPRETATION These findings suggest that the islet basement membrane functions as a physical barrier to leucocyte migration into islets and that degradation of the islet basement membrane marks the onset of destructive autoimmune insulitis and diabetes development in NOD mice. The components of the islet basement membrane that we identified predict that specialised degradative enzymes are likely to function in autoimmune islet damage.
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Affiliation(s)
- H. F. Irving-Rodgers
- Research Centre for Reproductive Health, Department of Obstetrics and Gynaecology, The University of Adelaide, Adelaide, SA 5005 Australia
| | - A. F. Ziolkowski
- The Division of Immunology and Genetics, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT Australia
| | - C. R. Parish
- The Division of Immunology and Genetics, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT Australia
| | - Y. Sado
- Division of Immunology, Shigei Medical Research Institute, Okayama, Japan
| | - Y. Ninomiya
- Department of Molecular Biology and Biochemistry, Okayama University Medical School, Okayama, Japan
| | - C. J. Simeonovic
- The Division of Immunology and Genetics, The John Curtin School of Medical Research, The Australian National University, Canberra, ACT Australia
| | - R. J. Rodgers
- Research Centre for Reproductive Health, Department of Obstetrics and Gynaecology, The University of Adelaide, Adelaide, SA 5005 Australia
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Medarova Z, Castillo G, Dai G, Bolotin E, Bogdanov A, Moore A. Noninvasive magnetic resonance imaging of microvascular changes in type 1 diabetes. Diabetes 2007; 56:2677-82. [PMID: 17682091 DOI: 10.2337/db07-0822] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
OBJECTIVE The pathogenesis of type 1 diabetes involves autoimmune lymphocytic destruction of insulin-producing beta-cells and metabolic dysregulation. An early biomarker of pancreatic islet damage is islet microvascular dysfunction, and alterations in vascular volume, flow, and permeability have been reported in numerous models of type 1 diabetes. Consequently, the ability to noninvasively monitor the dynamics of the pancreatic microvasculature would aid in early diagnosis and permit the assessment, design, and optimization of individualized therapeutic intervention strategies. RESEARCH DESIGN AND METHODS Here, we used the long circulating paramagnetic contrast agent, protected graft copolymer (PGC) covalently linked to gadolinium-diethylenetriaminepentaacetic acid residues (GdDTPAs) labeled with fluorescein isothiocyanate (PGC-GdDTPA-F), for the noninvasive semiquantitative evaluation of vascular changes in a streptozotocin (STZ)-induced mouse model of type 1 diabetes. Diabetic animals and nondiabetic controls were monitored by magnetic resonance imaging (MRI) after injection of PGC-GdDTPA-F. RESULTS Our findings demonstrated a significantly greater accumulation of PGC-GdDTPA-F in the pancreata of diabetic animals compared with controls. MRI permitted the in vivo semiquantitative assessment and direct visualization of the differential distribution of PGC-GdDTPA-F in diabetic and control pancreata. Ex vivo histology revealed extensive distribution of PGC-GdDTPA-F within the vascular compartment of the pancreas, as well as considerable leakage of the probe into the islet interstitium. By contrast, in nondiabetic controls, PGC-GdDTPA-F was largely restricted to the pancreatic vasculature at the islet periphery. CONCLUSIONS Based on these observations, we conclude that in the STZ model of type 1 diabetes, changes in vascular volume and permeability associated with early stages of the disease can be monitored noninvasively and semiquantitatively by MRI.
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Affiliation(s)
- Zdravka Medarova
- Molecular Imaging Laboratory, MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital/Harvard Medical School, Room 2301, Bldg. 149, 13th St., Charlestown, MA 02129, USA
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Pedullà M, d'Aquino R, Desiderio V, de Francesco F, Puca A, Papaccio G. MnSOD mimic compounds can counteract mechanical stress and islet β cell apoptosis, although at appropriate concentration ranges. J Cell Physiol 2007; 212:432-8. [PMID: 17311287 DOI: 10.1002/jcp.21034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Pancreatic islets are commonly isolated for research and transplantation without taking into consideration that they undergo mechanical or chemical stress during this process. In order to counteract both types of injuries, the compound AEOL10150, a novel MnSOD mimic, was added during isolation of islet at concentrations ranging from 18 to 100 microM. Mechanical or chemical stress-related pro-apoptotic signals were then studied. We demonstrate that this MnSOD mimic diminishes the negative effects of mechanical stress by blocking insulin impairment, production of non-specific islet beta-cell proteins, transcription of iNOS and FAS, activation of caspase-3 and -9 and, ultimately, apoptosis. Moreover, the effects of the MnSOD mimic on isolated islets were greatly influenced by dosage: the best dose able to fully counteract mechanical stress was found to be 100 microM; doses > or =150 microM were themselves highly toxic for islet cells. On the other hand, rIL-1beta-induced chemical stress is rather complex, and there was no protection in this scenario. Therefore, contrarily to what has been previously reported, MnSOD mimic administration is only capable of counteracting mechanical stress, and not cytokine-induced cytotoxicity, and that this drug acts within a limited concentration range.
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Affiliation(s)
- Marcella Pedullà
- Department of Pediatrics, School of Medicine, Second University of Naples, Italy
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Turvey SE, Swart E, Denis MC, Mahmood U, Benoist C, Weissleder R, Mathis D. Noninvasive imaging of pancreatic inflammation and its reversal in type 1 diabetes. J Clin Invest 2005; 115:2454-61. [PMID: 16110329 PMCID: PMC1187933 DOI: 10.1172/jci25048] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2005] [Accepted: 06/07/2005] [Indexed: 01/06/2023] Open
Abstract
A major stumbling block for research on and treatment of type 1 diabetes is the inability to directly, but noninvasively, visualize the lymphocytic/inflammatory lesions in the pancreatic islets. One potential approach to surmounting this impediment is to exploit MRI of magnetic nanoparticles (MNP) to visualize changes in the microvasculature that invariably accompany inflammation. MNP-MRI did indeed detect vascular leakage in association with insulitis in murine models of type 1 diabetes, permitting noninvasive visualization of the inflammatory lesions in vivo in real time. We demonstrate, in proof-of-principle experiments, that this strategy allows one to predict, within 3 days of completing treatment with an anti-CD3 monoclonal antibody, which NOD mice with recent-onset diabetes are responding to therapy and may eventually be cured. Importantly, an essentially identical MNP-MRI strategy has previously been used with great success to image lymph node metastases in prostate cancer patients. This success strongly argues for rapid translation of these preclinical observations to prediction and/or stratification of type 1 diabetes and treatment of individuals with the disease; this would provide a crucially needed early predictor of response to therapy.
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Affiliation(s)
- Stuart E Turvey
- Section on Immunology and Immunogenetics, Joslin Diabetes Center, and Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02215, USA
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Denis MC, Mahmood U, Benoist C, Mathis D, Weissleder R. Imaging inflammation of the pancreatic islets in type 1 diabetes. Proc Natl Acad Sci U S A 2004; 101:12634-9. [PMID: 15304647 PMCID: PMC515109 DOI: 10.1073/pnas.0404307101] [Citation(s) in RCA: 151] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Type 1 diabetes is the clinical manifestation of aberrant leukocytic infiltration of the pancreatic islets; it is usually diagnosed only very late in disease progression, after the critical autoimmune phenomena have mostly played out. A noninvasive means of directly monitoring the evolution of islet infiltrates would have important research and clinical applications. We have exploited fluorescence and MRI of long-circulating magnetofluorescent nanoparticles to visualize micro-vascular leakage, as an indicator of inflammation, in pancreata of mouse models of type 1 diabetes ex vivo or in vivo. We could detect the onset and evolution of insulitis in vivo and in real time, permitting us to study the natural history of diabetes in individual animals.
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Affiliation(s)
- Maria C Denis
- Section on Immunology and Immunogenetics, Joslin Diabetes Center, 1 Joslin Place, Boston, MA 02215, USA.
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Papaccio G, Pisanti FA, Montefiano RD, Graziano A, Latronico MVG. Th1 and Th2 cytokines exert regulatory effects upon islet microvascular areas in the NOD mouse. J Cell Biochem 2003; 86:651-64. [PMID: 12210732 DOI: 10.1002/jcb.10250] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In this study, we show that intra- and peri-islet microvascular areas undergo different changes during the islet inflammation in the nonobese diabetes-prone female mice. Actually, although the islet vascular area (IVA) considerably decreases while the infiltration progresses, at 15 weeks of age, the peri-islet vascular bed is unexpectedly and significantly increased. On the contrary, the intra-IVA is significantly decreased, due to vessel dilation. Later, by 20-25 weeks of age, a decrease of both IVA occur, due to a significant islet beta cell loss. Moreover, a dramatic fall of natural free radical scavenger values, which, in turn, exert an influence upon vessels, is observed. These effects are completely counteracted by the administration of IL-4, a Th2 protective cytokine; IL-10, another putative Th2 cytokine, exerts direct effects upon endothelial cell (EC) function, as shown by the increase of endothelial nitric oxide synthase (eNOS) mRNA transcripts and by the release of endothelial NO which, in turn, exert vasodilatory effects; moreover, this cytokine significantly upregulates adhesion molecules on endothelia. On the other hand, IL-1beta, a Th1 proinflammatory cytokine, dramatically increases nitrite and nitrate levels, as well as inducible nitric oxide synthase (iNOS) transcripts and also upregulates islet ICAM-1 expression as well as circulating ICAM-1 levels. Taken together, our findings clearly show that cytokines and islet endothelia are directly involved in the pathophysiology of the disease. Their reciprocal influence gives new insight to understand the role of microvasculature during islet beta cell attack.
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Affiliation(s)
- Gianpaolo Papaccio
- Department of Experimental Medicine, Laboratory of Histology and Embryology, School of Medicine, Second University of Naples, 5 via Luciano Armanni, 80138 Naples, Italy.
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Papaccio G, Pedullà M, Ammendola E, Todaro M. Cytokine regulatory effects on alpha-1 proteinase inhibitor expression in NOD mouse islet endothelial cells. J Cell Biochem 2002. [PMID: 11891856 DOI: 10.1002/jcb.10114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Human microvascular islet endothelial cells (IEC) exhibit specific morphological and functional characteristics that differ from endothelia derived from other organs. One of these characteristics is the expression of alpha-1 proteinase inhibitor (Api). In this study, we observed its expression in nonobese diabetic (NOD) mouse IEC, in relation to the occurrence of type 1 diabetes and in response to cytokines, namely IL-1 beta and IL-10. In addition, IL-10-deficient NOD mice as well as IL-10 transgenic NODs were studied. Results have demonstrated that Api expression is: (i) highly specific for IEC in NOD mouse islets, as for humans; (ii) linked to the occurrence of early type 1 diabetes, and iii) strongly modulated by Th1 and Th2 cytokines. In fact, Api mRNA found in pre-diabetic NOD animals is significantly reduced when they become hyperglycemic and disappears by 25 weeks of age, when mice are diabetic. Moreover, Api mRNAs are never seen in nondiabetic controls. Furthermore, in cultured NOD IEC, Api expression is downregulated by the addition of IL-1 beta and is upregulated by IL-10; it is always absent in IL-10-deficient NOD mice and overexpressed in IL-10 transgenic NODs, thus further supporting that this cytokine upregulates Api expression.
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Affiliation(s)
- Gianpaolo Papaccio
- Department of Experimental Medicine, Laboratory of Histology, School of Medicine, 2nd University of Naples, 5 via L. Armanni, 80138 Naples, Italy.
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Papaccio G, Latronico MV, Graziano A, Lanza A, Pedullà M. Tacrolimus, but not cyclosporine A, significantly increases expression of ICAM-1 and IFN-gamma in the NOD mouse. JOURNAL OF CELLULAR BIOCHEMISTRY. SUPPLEMENT 2001; Suppl 36:107-16. [PMID: 11455576 DOI: 10.1002/jcb.1092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We studied the alterations of cytokines and ICAM-1 expression in the NOD mouse pancreas produced by the administration of Cyclosporine A (CY) and Tacrolimus (TA), two widely used immunosuppressive drugs. Results evidenced differences in the effects of these two drugs. In fact, during treatment and after withdrawal, CY-treated animals remained euglycemic, showed good islet cell preservation and had low levels of Th1 and Th2 cytokines; ICAM-1 positivity within the islets was also found to be relatively low. On the other hand, TA-treated animals had infiltrated islets containing numerous dendritic cells, adhesion molecule overexpression, increased IFN-gamma and ICAM-1 mRNA transcripts, and interestingly, high levels of circulating ICAM-1. However, even these animals remained euglycemic. These findings lead to the thought that these drugs may exert their effects in very different ways. Moreover, in TA-treated animals, the presence of an islet infiltrate containing numerous dendritic cells coupled with maintenance of euglycemia is suggestive for the involvement of immunosurveillance mechanisms. J. Cell. Biochem. Suppl. 36: 107-116, 2001.
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Affiliation(s)
- G Papaccio
- Department of Experimental Medicine, Laboratory of Histology, School of Medicine, Second University of Naples, via L. Armanni 5, 80138 Naples, Italy.
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Papaccio G, De Luca A, De Luca B, Pisanti FA, Zarrilli S. Detection of dendritic cells in the non-obese diabetic (NOD) mouse islet pancreas infiltrate is correlated with Th2-cytokine production. J Cell Biochem 1999. [DOI: 10.1002/(sici)1097-4644(19990901)74:3<447::aid-jcb12>3.0.co;2-t] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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