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Riederer I, Sollmann N, Mühlau M, Zimmer C, Kirschke JS. Gadolinium-Enhanced 3D T1-Weighted Black-Blood MR Imaging for the Detection of Acute Optic Neuritis. AJNR Am J Neuroradiol 2020; 41:2333-2338. [PMID: 33122200 DOI: 10.3174/ajnr.a6807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 07/29/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND AND PURPOSE A 3D T1-weighted black-blood sequence was recently shown to improve the detection of contrast-enhancing lesions in the brain in patients with MS compared with a 3D T1-weighted MPRAGE sequence. We compared a contrast-enhanced 3D T1-weighted black-blood sequence with a dedicated orbital contrast-enhanced T1-weighted Dixon sequence in patients with acute optic neuritis. MATERIALS AND METHODS MR imaging data (3T) of 51 patients showing symptoms of acute optic neuritis were analyzed retrospectively, including whole-brain contrast-enhanced 3D T1-weighted black-blood and dedicated orbital coronal 2D or 3D contrast-enhanced T1-weighted Dixon sequences. Two neuroradiologists assessed the images for overall image quality, artifacts, diagnostic confidence, and visual contrast enhancement. Furthermore, the standardized contrast-to-noise ratio was calculated. The final diagnosis of acute optic neuritis was established on the basis of clinical presentation, visually evoked potentials, and optical coherence tomography. RESULTS Thirty of 51 patients were diagnosed with acute optic neuritis. Of those, 21 showed contrast-enhancing lesions in the optic nerves, similarly detectable on contrast-enhanced T1-weighted Dixon and contrast-enhanced T1-weighted black-blood images. Thus, the accuracy for each sequence was identical, with a resulting sensitivity of 70% and specificity of 90% or 100% (depending on the reader). Overall image quality, diagnostic confidence, visual contrast enhancement, and artifacts were rated similarly in contrast-enhanced 3D T1-weighted black-blood and dedicated orbital contrast-enhanced T1-weighted Dixon sequences. There was no significant difference (P = .27) in the mean standardized contrast-to-noise ratio between contrast-enhanced T1-weighted black-blood (1.76 ± 1.07) and contrast-enhanced T1-weighted Dixon (2.29 ± 2.49) sequences. CONCLUSIONS Contrast-enhanced 3D T1-weighted black-blood imaging is comparable in accuracy and qualitative/quantitative features with dedicated orbital contrast-enhanced T1-weighted Dixon imaging for the detection of acute optic neuritis. Therefore, when used, it has the potential to considerably shorten total patient imaging time.
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Affiliation(s)
- I Riederer
- From the Department of Neuroradiology (I.R., N.S., C.Z., J.S.K.)
| | - N Sollmann
- From the Department of Neuroradiology (I.R., N.S., C.Z., J.S.K.).,Neuroimaging Center TUM-NIC, Klinikum rechts der Isar (M.M. and N.S.), School of Medicine, Technical University of Munich, Munich, Germany
| | - M Mühlau
- Neurology (M.M.).,Neuroimaging Center TUM-NIC, Klinikum rechts der Isar (M.M. and N.S.), School of Medicine, Technical University of Munich, Munich, Germany
| | - C Zimmer
- From the Department of Neuroradiology (I.R., N.S., C.Z., J.S.K.)
| | - J S Kirschke
- From the Department of Neuroradiology (I.R., N.S., C.Z., J.S.K.)
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Eichinger P, Kirschke JS, Hoshi MM, Zimmer C, Mühlau M, Riederer I. Pre- and Postcontrast 3D Double Inversion Recovery Sequence in Multiple Sclerosis: A Simple and Effective MR Imaging Protocol. AJNR Am J Neuroradiol 2017; 38:1941-1945. [PMID: 28751518 DOI: 10.3174/ajnr.a5329] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Accepted: 06/02/2017] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The double inversion recovery sequence is known to be very sensitive and specific for MS-related lesions. Our aim was to compare the sensitivity of pre- and postcontrast images of 3D double inversion recovery and conventional 3D T1-weighted images for the detection of contrast-enhancing MS-related lesions in the brain to analyze whether double inversion recovery could be as effective as T1WI. MATERIALS AND METHODS A postcontrast 3D double inversion recovery sequence was acquired in addition to the standard MR imaging protocol at 3T, including pre- and postcontrast 3D T1WI sequences as well as precontrast double inversion recovery of 45 consecutive patients with MS or clinically isolated syndrome between June and December 2013. Two neuroradiologists independently assessed precontrast, postcontrast, and subtraction images of double inversion recovery as well as T1WI to count the number of contrast-enhancing lesions. Afterward, a consensus reading was performed. Lin concordance was calculated between both radiologists, and differences in lesion detectability were assessed with the Student t test. Additionally, the contrast-to-noise ratio was calculated. RESULTS Significantly more contrast-enhancing lesions could be detected with double inversion recovery compared with T1WI (16%, 214 versus 185, P = .007). The concordance between both radiologists was almost perfect (ρc = 0.94 for T1WI and ρc = 0.98 for double inversion recovery, respectively). The contrast-to-noise ratio was significantly higher in double inversion recovery subtraction images compared with T1-weighted subtraction images (double inversion recovery, 14.3 ± 5.5; T1WI, 6.3 ± 7.1; P < .001). CONCLUSIONS Pre- and postcontrast double inversion recovery enables better detection of contrast-enhancing lesions in MS in the brain compared with T1WI and may be considered an alternative to the standard MR imaging protocol.
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Affiliation(s)
- P Eichinger
- From the Department of Neuroradiology (P.E., J.S.K., C.Z., I.R.)
| | - J S Kirschke
- From the Department of Neuroradiology (P.E., J.S.K., C.Z., I.R.)
| | - M-M Hoshi
- Department of Neurology (M.-M.H., M.M.)
| | - C Zimmer
- From the Department of Neuroradiology (P.E., J.S.K., C.Z., I.R.)
| | - M Mühlau
- Department of Neurology (M.-M.H., M.M.).,Neuroimaging Center (M.M.)
| | - I Riederer
- From the Department of Neuroradiology (P.E., J.S.K., C.Z., I.R.) .,Department of Radiology (I.R.), Klinikum rechts der Isar, Technische Universität München, Munich, Germany
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Riederer I, Sauter A, Renz M, Dangelmaier J, Kirschke J, Fingerle A, Rummeny E, Noel P, Muenzel D. Dual-layer Spektral-CT versus MRT bei der Differenzierung zwischen Hämorrhagie und Kontrastmittelextravasation nach mechanischer Rekanalisation. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- I Riederer
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und Interventionelle Radiologie, München
| | - A Sauter
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - M Renz
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - J Dangelmaier
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - J Kirschke
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Neuroradiologie, München
| | - A Fingerle
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - E Rummeny
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - P Noel
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
| | - D Muenzel
- Klinikum rechts der Isar, Technische Universität München, Diagnostische und interventionelle Radiologie, München
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Dangelmaier J, Schwaiger B, Renz M, Sauter A, Riederer I, Münzel D, Braren R, Fingerle A, Rummeny E, Noël P. Dual-Layer Spectral Computed Tomografy: Reduction of metallic artefacts from posterior spinal fusions using virtual monoenergetic imaging. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- J Dangelmaier
- Klinikum rechts der Isar der Technischen Universität München, Institut für diagnostische und interventionelle Radiologie, München
| | - B Schwaiger
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - M Renz
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - A Sauter
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - I Riederer
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - D Münzel
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - R Braren
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie
| | - A Fingerle
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - E Rummeny
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie, München
| | - P Noël
- Klinikum Rechts der Isar der TU München, Diagnostische und Interventionelle Radiologie
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Shevtsov M, Stangl S, Riederer I, Sievert W, Multhoff G. P06.17 Membrane-bound and extracellular 70-kDa heat shock protein (Hsp70) as a diagnostic marker in high-grade glioma patients. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now188.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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6
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Shevtsov M, Stangl S, Riederer I, Sievert W, Parr M, Marchenko Y, Yakovleva L, Nikolaev B, Ryzhov V, Multhoff G. P07.20 Combination of the radiotherapy and targeted magnetic nanoparticles in the theranostics of the Hsp70-positive brain tumors. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now188.131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Riederer I, Karampinos DC, Settles M, Preibisch C, Bauer JS, Kleine JF, Mühlau M, Zimmer C. Double inversion recovery sequence of the cervical spinal cord in multiple sclerosis and related inflammatory diseases. AJNR Am J Neuroradiol 2014; 36:219-25. [PMID: 25169924 DOI: 10.3174/ajnr.a4093] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE MR imaging plays an important role in diagnosing MS and other related inflammatory diseases; however, imaging of the spinal cord is still challenging. We hypothesized that a 3D double inversion recovery sequence for cervical spinal cord imaging would be more sensitive in detecting inflammatory lesions than a conventional 2D T2-weighted TSE sequence at 3T. MATERIALS AND METHODS On a 3T MR imaging scanner, we examined 30 patients with suspected or established MS (MS, n = 16; clinically isolated syndrome, n = 12; isolated myelitis, n = 2) and 10 healthy controls. Newly developed 3D double inversion recovery and conventional 2D axial and sagittal T2-weighted TSE images of the cervical spinal cord were acquired. Two blinded neuroradiologists independently assessed the scans in pseudorandomized order for lesion numbers and rated lesion visibility and overall image quality on 5-point scales. A subsequent consensus reading delivered definite lesion counts. Standardized contrast-to-noise ratios were calculated in representative lesions of each patient. RESULTS Overall, 28% more lesions could be detected with 3D double inversion recovery than with conventional T2WI (119 versus 93, P < .002). On average, the standardized contrast-to-noise ratio was significantly higher (P < .001) in double inversion recovery than in T2WI. Lesion visibility was rated significantly higher (P < .001) in double inversion recovery compared with T2WI despite lower image quality. CONCLUSIONS The novel 3D double inversion recovery sequence allowed better detection of lesions in MS and related inflammatory diseases of the cervical spinal cord, compared with conventional 2D T2WI.
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Affiliation(s)
- I Riederer
- From the Departments of Diagnostic and Interventional Neuroradiology (I.R., C.P., J.S.B., J.F.K., C.Z.)
| | | | - M Settles
- Diagnostic and Interventional Radiology (D.C.K., M.S.)
| | - C Preibisch
- From the Departments of Diagnostic and Interventional Neuroradiology (I.R., C.P., J.S.B., J.F.K., C.Z.) Neuroimaging Center at the Technische Universität München (C.P., M.M.)
| | - J S Bauer
- From the Departments of Diagnostic and Interventional Neuroradiology (I.R., C.P., J.S.B., J.F.K., C.Z.)
| | - J F Kleine
- From the Departments of Diagnostic and Interventional Neuroradiology (I.R., C.P., J.S.B., J.F.K., C.Z.)
| | - M Mühlau
- Neuroimaging Center at the Technische Universität München (C.P., M.M.) Department of Neurology (M.M.), Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - C Zimmer
- From the Departments of Diagnostic and Interventional Neuroradiology (I.R., C.P., J.S.B., J.F.K., C.Z.)
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Riederer I, Negroni E, Bencze M, Wolf A, Di Santo J, Silva-Barbosa S, Butler-Browne G, Savino W, Mouly V. P4.33 Rapid differentiation of engrafted human myoblasts into immunodeficient mice correlates with the reduced proliferation and migration. Neuromuscul Disord 2011. [DOI: 10.1016/j.nmd.2011.06.998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Pinto-Mariz F, Carvalho L, de Mello W, Prufer A, Ribeiro M, Alves-Cunha M, Riederer I, Negroni E, Voit T, Desguerre I, Butler-Browne G, Savino W, Silva-Barbosa S. G.P.13.03 Can VLA-4 be applied as a biomarker for prognosis and therapeutic target in Duchenne muscular dystrophy? Neuromuscul Disord 2009. [DOI: 10.1016/j.nmd.2009.06.298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Riederer I, Negroni E, Bigot A, Bencze M, Di Santo J, Aamiri A, Butler-Browne G, Mouly V. Heat shock treatment increases engraftment of transplanted human myoblasts into immunodeficient mice. Transplant Proc 2008; 40:624-30. [PMID: 18374147 DOI: 10.1016/j.transproceed.2008.01.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Myoblast transfer therapy (MTT) is a strategy that has been proposed to treat some striated muscle pathologies. However, the first therapeutic trials using this technique were unsuccessful due to the limited migration and early cell death of the injected myoblasts. Various strategies have been considered to increase myoblast survival in the host muscle after MTT. Overexpression of heat shock proteins (HSPs) in mouse myoblasts has been shown to improve cell resistance against apoptosis in vitro and in vivo. Our objective was to determine whether heat shock (HS) treatment increased the survival of human myoblasts leading to better participation of the injected cells in muscle regeneration. For this study, HS-treated human myoblasts were injected into the tibialis anterior (TA) muscles of immunodeficient RAG-/- gammaC-/- mice. TA muscles were excised at 24 hour and at 1 month after injection. Our results showed that HS treatment increased the expression of the hsp70 protein and protected the cells from apoptosis in vitro. HS treatment dramatically increased the number of human fibers present at 1 month after injection when compared with nontreated cells. Interestingly, HS treatment decreased apoptosis at 24 hour after human myoblast injection, but no differences were observed concerning proliferation, suggesting that the increased fiber formation among the HS-treated group was probably due to decreased cell death. These data suggested that HS treatment might be used in the clinical context to improve the success of MTT.
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Affiliation(s)
- I Riederer
- UMR S 787, Institut de Myologie, INSERM & Université Pierre et Marie Curie, Paris, France
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Negroni E, Riederer I, Di Santo J, Torrente Y, Mouly V, Butler-Browne G. G.P.16.10 In vivo myogenic potential of human AC133 muscle-derived stem cells. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Riederer I, Negroni E, Bencze M, Di Santo J, Savino W, Mouly V, Silva-Barbosa S, Butler-Browne G. T.P.2 04 Analyses of early cell death after human myoblast injection into RAG−/−gammaC−/− mice. Neuromuscul Disord 2006. [DOI: 10.1016/j.nmd.2006.05.196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Mouly V, Aamiri A, Périé S, Mamchaoui K, Barani A, Bigot A, Bouazza B, François V, Furling D, Jacquemin V, Negroni E, Riederer I, Vignaud A, St Guily JL, Butler-Browne GS. Myoblast transfer therapy: is there any light at the end of the tunnel? Acta Myol 2005; 24:128-33. [PMID: 16550930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Myoblast transfer therapy (MTT) was proposed in the 70's as a potential treatment for muscular dystrophies, based upon the early results obtained in mdx mice: dystrophin expression was restored in this model by intramuscular injections of normal myoblasts. These results were quickly followed by clinical trials for patients suffering from Duchenne Muscular Dystrophy (DMD) in the early 90's, based mainly upon intramuscular injections of allogenic myoblasts. The clinical benefits obtained from these trials were minimal, if any, and research programs concentrated then on the various pitfalls that hampered these clinical trials, leading to numerous failures. Several causes for these failures were identified in mouse models, including a massive cell death of myoblasts following their injection, adverse events involving the immune system and requiring immunosuppression and the adverse events linked to it, as well as a poor dispersion of the injected cells following their injection. It should be noted that these studies were conducted in mouse models, not taking into account the fundamental differences between mice and men. One of these differences concerns the regulation of proliferation, which is strictly limited by proliferative senescence in humans. Although this list is certainly not exhaustive, new therapeutic venues were then explored, such as the use of stem cells with myogenic potential, which have been described in various populations, including bone marrow, circulating blood or muscle itself. These stem cells presented the main advantage to be available and not exhausted by the numerous cycles of degeneration/regeneration which characterize muscle dystrophies. However, the different stem candidates have shown their limits in terms of efficiency to participate to the regeneration of the host. Another issue was raised by clinical trials involving the injection of autologous myoblasts in infacted hearts, which showed that limited targets could be aimed with autologous myoblasts, as long as enough spared muscle was available. This resulted in a clinical trial for the pharyngeal muscles of patients suffering from Oculo-Pharyngeal Muscular Dystrophy (OPMD). The results of this trial will not be available before 2 years, and a similar procedure is being studied for Fascio-Scapulo-Humeral muscular Dystrophy (FSHD). Concerning muscular dystrophies which leave very few muscles spared, such as DMD, other solutions must be found, which could include exon-skipping for the eligible patients, or even cell therapy using stem cells if some cell candidates with enough efficiency can be found. Recent results concerning mesoangioblasts or circulating AC133+ cells raise some reasonable hope, but still need further confirmations, since we have learned from the past to be cautious concerning a transfer of results from mice to humans.
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Affiliation(s)
- V Mouly
- FRE 2853, Institut de Myologie, Faculté de Médecine Pitié-Salpétrière, Université Pierre et Marie Curie, Paris, France.
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Barreto EO, Riederer I, Arantes ACS, Carvalho VF, Farias-Filho FA, Cordeiro RSB, Martins MA, Savino W, e Silva PMR. Thymus involution in alloxan diabetes: analysis of mast cells. Mem Inst Oswaldo Cruz 2005; 100 Suppl 1:127-30. [PMID: 15962111 DOI: 10.1590/s0074-02762005000900022] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We previously reported that alloxan-induced diabetes results in reduction in the number and reactivity of mast cells at different body sites. In this study, the influence of diabetes on thymic mast cells was investigated. Thymuses from diabetic rats showed marked alterations including shrinkage, thymocyte depletion, and increase in the extracellular matrix network, as compared to those profiles seen in normal animals. Nevertheless, we noted that the number and reactivity of mast cells remained unchanged. These findings indicate that although diabetes leads to critical alterations in the thymus, the local mast cell population is refractory to its effect. This suggests that thymic mast cells are under a different regulation as compared to those located in other tissues.
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Affiliation(s)
- E O Barreto
- Laboratório de Inflamação, Departamento de Fisiologia e Farmacodinâmica, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ 21040-900, Brasil.
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Riederer I, Silva-Barbosa SD, Savino W. Allogeneic heart graft rejection in mice: correlation between mononuclear cell infiltration and extracellular matrix deposition. Transplant Proc 2002; 34:1076-8. [PMID: 12072281 DOI: 10.1016/s0041-1345(02)02820-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- I Riederer
- Laboratory on Thymus Research, Department of Immunology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
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Silva-Barbosa SD, Cotta-de-Almeida V, Riederer I, De Meis J, Dardenne M, Bonomo A, Savino W. Involvement of laminin and its receptor in abrogation of heart graft rejection by autoreactive T cells from Trypanosoma cruzi-infected mice. J Immunol 1997; 159:997-1003. [PMID: 9218622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Extracellular matrix ligands and receptors have been identified as determining in vivo lymphocyte positioning and activation, including effector functions in alloreactive responses. Herein we evaluated the involvement of laminin and its receptor, the very late antigen 6 (VLA-6) integrin, in CD4+ T cell-dependent autoreactivity, using a transplantation model for the autoimmune myocarditis occurring in mice chronically infected with Trypanosoma cruzi. Previous work showed that syngeneic mouse hearts grafted in the ears of chronic chagasic recipients were rejected through a CD4+ T cell-dependent mechanism. Rejection also occurred when cells from chagasic animals were transferred adjacent to hearts transplanted into naive recipients. Here, we observed the formation of a thick laminin network during rejection, with donor-derived CD4+ T cells concentrated in the laminin-rich areas. Most importantly, anti-laminin as well as anti-laminin receptor Ab inhibited the rejection of syngeneic hearts by T cells from chagasic animals. Our results suggest that interaction of the VLA-6 molecule with laminin is involved in triggering the antimyocardial autoreactive process by driving the influx of CD4+ T cells to the heart. They also support the concept that an Ag-specific T cell response, even an autoreactive one, can be modulated by in vivo interactions involving extracellular matrix ligands and receptors. In this regard, our study represents, to our knowledge, the first in vivo evidence for laminin-mediated T cell echotaxis, with simultaneous experimental demonstration of ligand and receptor involvement. Lastly, our findings indicate that treatment with anti-VLA-6 Abs can be effective in suppressing autoimmune disease activity.
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Affiliation(s)
- S D Silva-Barbosa
- Department of Immunology, Institute Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
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Silva-Barbosa SD, Cotta-de-Almeida V, Riederer I, De Meis J, Dardenne M, Bonomo A, Savino W. Involvement of laminin and its receptor in abrogation of heart graft rejection by autoreactive T cells from Trypanosoma cruzi-infected mice. The Journal of Immunology 1997. [DOI: 10.4049/jimmunol.159.2.997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Extracellular matrix ligands and receptors have been identified as determining in vivo lymphocyte positioning and activation, including effector functions in alloreactive responses. Herein we evaluated the involvement of laminin and its receptor, the very late antigen 6 (VLA-6) integrin, in CD4+ T cell-dependent autoreactivity, using a transplantation model for the autoimmune myocarditis occurring in mice chronically infected with Trypanosoma cruzi. Previous work showed that syngeneic mouse hearts grafted in the ears of chronic chagasic recipients were rejected through a CD4+ T cell-dependent mechanism. Rejection also occurred when cells from chagasic animals were transferred adjacent to hearts transplanted into naive recipients. Here, we observed the formation of a thick laminin network during rejection, with donor-derived CD4+ T cells concentrated in the laminin-rich areas. Most importantly, anti-laminin as well as anti-laminin receptor Ab inhibited the rejection of syngeneic hearts by T cells from chagasic animals. Our results suggest that interaction of the VLA-6 molecule with laminin is involved in triggering the antimyocardial autoreactive process by driving the influx of CD4+ T cells to the heart. They also support the concept that an Ag-specific T cell response, even an autoreactive one, can be modulated by in vivo interactions involving extracellular matrix ligands and receptors. In this regard, our study represents, to our knowledge, the first in vivo evidence for laminin-mediated T cell echotaxis, with simultaneous experimental demonstration of ligand and receptor involvement. Lastly, our findings indicate that treatment with anti-VLA-6 Abs can be effective in suppressing autoimmune disease activity.
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Affiliation(s)
- S D Silva-Barbosa
- Department of Immunology, Institute Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - V Cotta-de-Almeida
- Department of Immunology, Institute Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - I Riederer
- Department of Immunology, Institute Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - J De Meis
- Department of Immunology, Institute Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - M Dardenne
- Department of Immunology, Institute Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - A Bonomo
- Department of Immunology, Institute Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - W Savino
- Department of Immunology, Institute Oswaldo Cruz, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
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19
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Gratwohl A, Riederer I, Walstra K, Baldomero H, Speck B. Cyclosporine resistant effector cells in rabbit skin allografts. Experientia 1987; 43:910-2. [PMID: 3305068 DOI: 10.1007/bf01951663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Histoincompatible skin grafts in rabbits treated with cyclosporine can permanently engraft but show a transient mononuclear cellular infiltrate. This transient cyclosporine-resistant infiltrate consists of cells which are sensitive to steroids, radiation and cryopreservation. They have the same ACM-1 phenotype and the same characteristics as cyclosporine-sensitive cells.
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20
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Abstract
Rabbits treated with an immunosuppressive dose of cyclosporine for a prolonged period of time developed a clinically distinct toxic syndrome characterized by wasting, loss of weight, reduced food and water consumption and reduced movement. Ultimately 74 of 153 animals died within 60 days of treatment with a distended stomach and intestines full of dry undigested food. The syndrome was dose dependent but seemed unrelated to the route of administration. It occurred in two strains and two different colonies. No infectious agent was implicated. Histological examination and a variety of laboratory tests did not elucidate the syndrome. It could not be prevented by drugs that increased bowel movement or gastric emptying and was more pronounced in animals given additional indomethacin. Reduction of cyclosporine dose reduced toxicity but at the expense of reduced immunosuppression. We were unable to define a therapeutic non-toxic range by serial determination of cyclosporine blood concentrations. This highlights the difficulty in obtaining a therapeutic dosage level in rabbits on long-term cyclosporine immunosuppression.
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Walstra K, Gratwohl A, Riederer I, Speck B. B/T cell ratio of rabbit peripheral blood lymphocytes. Influence of separation technique on results. J Immunol Methods 1985; 79:143-7. [PMID: 3889161 DOI: 10.1016/0022-1759(85)90400-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Spontaneous in vitro T cell rosette formation at room temperature leading to enrichment of B cells has been reported. We tested 10 individual New Zealand White rabbits sequentially, separating the lymphocytes either at room temperature or at 37 degrees C. T cells are lost constantly at room temperature but to a lesser extent at 37 degrees C. The determination of the yield of lymphocytes after Ficoll separation gives the best control for the accuracy of the results. If lymphocytes are separated at 37 degrees C and if the yield of lymphocytes is greater than 45%, the variation in T cells is small and their number is constant between 62 and 74%. These data show that the reported wide range of T cells in rabbit peripheral blood is due to methodological errors and not inherent in the rabbit.
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