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Carl W, Hoppe R. Oxocuprate(I) mit CO2-analogem Anion: Rb3[CuO2] [1]; (3. Mitteilung). Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.655740108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Schneider J, Hoppe R. Das erste quinquinäre Oxoaurat(I) K6Na[IO6][AuO]2 = K6[NaIO6][AuO2/2]2 [1]. Z Anorg Allg Chem 2011. [DOI: 10.1002/zaac.655740106] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hoppe R, Kloidt T, Funke K. Frequency-Dependent Conductivities of RbAg4I5 and Na-β″-Alumina from Radio to FIR Frequencies. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19910950914] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kohrt H, Johannsen A, Hoppe R, Horning SJ, Rosenberg SA, Advani R, Lee PP. Dynamic CD8 T-cell responses to tumor-associated Epstein-Barr virus antigens in patients with Epstein-Barr virus-negative Hodgkin's disease. Oncol Res 2010; 18:287-92. [PMID: 20225766 DOI: 10.3727/096504009x12596189659169] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
In almost half of patients diagnosed with Hodgkin's disease (HD), the malignant Reed-Sternberg (RS) cells express Epstein-Barr virus (EBV) antigens. Multiple translational efforts are actively investigating antitumor immune strategies by stimulating cytotoxic T lymphocytes (CTL) against tumor-associated EBV antigens. It has previously been believed that this therapeutic strategy and presence of EBV-specific CTLs are limited to EBV-positive HD. In an effort to explore the EBV-specific immune response, here we characterize EBV-specific CTL responses to lytic and latent EBV antigens in 12 consecutive EBV carriers with EBV-negative HD. Compared to healthy donors, we detected weak, baseline EBV-specific responses to both lytic and latent antigens by IFN-gamma ELISPOT in patients with EBV-negative HD at diagnosis. Chemoradiotherapy was associated temporally with a decrease EBV-specific responses. At final follow-up (24 months), recovery of EBV-specific CTL responses was observed with robustness of lytic-specific response equivalent to healthy controls. We confirm evidence of EBV-specific CTLs in patients with EBV-negative HD and provide the first report of dynamic variance in this population during treatment. Our observation challenges prior belief that patients with HD remain immunodeficient following therapy and argues that the clinical significance of the EBV-specific immune response in EBV-negative HD should be further investigated.
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Mattoch IW, Fulton R, Kim Y, Hoppe R, Warnke RA, Sundram UN. Cutaneous peripheral T-cell lymphoma associated with a proliferation of B cells. Am J Clin Pathol 2009; 131:810-9. [PMID: 19461087 DOI: 10.1309/ajcp5w0vocsvobra] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Although the new World Health Organization-European Organization for Research and Treatment of Cancer classification focuses on providing uniformity in the diagnosis of cutaneous lymphomas, cutaneous peripheral T-cell lymphoma (PTL) remains a poorly defined subgroup. As follow-up to a study of systemic PTL complicated by a proliferation of B cells, we studied 16 cases of cutaneous PTL that contained morphologically atypical T cells associated with a significant infiltrate of B cells (about 20%-50%). A clonal T-cell receptor gamma chain gene rearrangement was present in all cases. In contrast, a clonal immunoglobulin heavy chain gene rearrangement was present in only 1 case. Clinical staging in 14 cases identified systemic involvement in 2. At last follow-up, both patients with systemic involvement had died of disease, and the majority of patients with primary cutaneous disease were alive (11/12). The presence of numerous atypical B cells and T cells caused diagnostic confusion in these cases. Comprehensive pathologic studies, coupled with clinical staging, are necessary for the accurate diagnosis of this unusual manifestation of cutaneous PTL.
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Kohrt HE, Advani R, Hoppe R, Rosenberg S, Horning S, Lee PP. Dynamic CD8 T-cell responses to tumor-associated Epstein-Barr virus (EBV) antigens in patients with EBV-negative Hodgkin's disease. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.8573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
8573 Background: Multiple translational efforts in HD are actively investigating augmentation of the anti-tumor immune response by stimulating cytotoxic T lymphocytes (CTL) against tumor-associated EBV antigens. It has previously been believed that this therapeutic strategy and presence of EBV-specific CTLs are limited to EBV-positive HD. Here, we challenge this belief by characterizing EBV-specific CTL responses in EBV-negative HD. Methods: Among 52 consecutive patients with EBV-negative HD, CTL responses to latent antigens (LMP2, LMP2a) and lytic antigens (BMLF, BRLF) were serially assessed at diagnosis, during chemotherapy, and throughout followup for 2 years by IFN-γ Elispot and flow cytometric tetramer analysis. Results: We detected weak EBV-specific responses to both lytic and latent antigens by IFN-γ Elispot among patients with EBV-negative HD. Response to lytic antigen, BMLF1, was more robust in function and size among healthy donors compared to patients as determined by IFN-γ Elispot and flow cytometry of BMLF1-tetramer positive, CD8 T cells. Chemoradiotherapy was associated temporally with an initial decrease in LMP2A- and BMLF1-specific responses during the first 5–15 weeks of treatment, which subsequently became more robust 20–50 weeks after diagnosis, 2 to 4-fold greater compared to response at diagnosis. At final follow-up (24 months), increases in both lytic (2.6-fold) and latent (2.5-fold) CTL responses were observed with robustness of lytic-specific response equivalent to healthy controls. No significant change in control peptide response was observed. Conclusions: We confirm evidence of EBV-specific CTLs in patients with EBV-negative HD and provide the first report of dynamic variance in this population during treatment, challenging prior belief that patients with HD remain immunodeficient following therapy and arguing that the clinical significance of EBV-specific immune responses in EBV-negative HD should be further investigated. [Table: see text] No significant financial relationships to disclose.
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Hoppe R. Ergebnisse mit der Kombination des intra- und extrapleuralen Pneumothorax. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-0028-1096193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Advani R, Maeda L, Lavori P, Quon A, Hoppe R, Breslin S, Rosenberg SA, Horning SJ. Impact of positive positron emission tomography on prediction of freedom from progression after Stanford V chemotherapy in Hodgkin's disease. J Clin Oncol 2007; 25:3902-7. [PMID: 17664458 DOI: 10.1200/jco.2007.11.9867] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
PURPOSE To correlate [(18)F]fluorodeoxyglucose positron emission tomography ([(18)F]FDG-PET) status after chemotherapy, but before radiation, with outcome in patients treated with the Stanford V regimen. PATIENTS AND METHODS We analyzed retrospectively 81 patients with Hodgkin's disease who had serial [(18)F]FDG-PET scans performed at baseline and again at the completion of Stanford V chemotherapy, before planned radiotherapy. Patients with favorable stage I/II (nonbulky mediastinal disease) and those with bulky mediastinal disease or stage III/IV were scanned after 8 and 12 weeks of chemotherapy, respectively. Radiotherapy fields were determined before starting chemotherapy based on baseline computed tomography scans. RESULTS After chemotherapy, six of 81 patients had residual [(18)F]FDG-PET-positive sites, all in sites for which radiotherapy was planned. Four of the six patients with positive [(18)F]FDG-PET scans after chemotherapy experienced relapse compared with just three of 75 patients with negative [(18)F]FDG-PET scans. At a median follow-up of 4 years, the freedom from progression (FFP) was 96% in postchemotherapy [(18)F]FDG-PET-negative patients versus 33% in [(18)F]FDG-PET-positive patients (P < .0003). In a bivariate Cox model, [(18)F]FDG-PET positivity after chemotherapy remained a highly significant predictor of progression-free survival even after controlling for bulky disease and International Prognostic Score more than 2. CONCLUSION These data indicate that PET status after chemotherapy is strongly predictive of FFP with the Stanford V regimen despite the use of consolidative radiotherapy. These results have implications for the design of clinical trials adapted to functional imaging.
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Franklin J, Pluetschow A, Paus M, Specht L, Anselmo AP, Aviles A, Biti G, Bogatyreva T, Bonadonna G, Brillant C, Cavalieri E, Diehl V, Eghbali H, Fermé C, Henry-Amar M, Hoppe R, Howard S, Meyer R, Niedzwiecki D, Pavlovsky S, Radford J, Raemaekers J, Ryder D, Schiller P, Shakhtarina S, Valagussa P, Wilimas J, Yahalom J. Second malignancy risk associated with treatment of Hodgkin's lymphoma: meta-analysis of the randomised trials. Ann Oncol 2006; 17:1749-60. [PMID: 16984979 DOI: 10.1093/annonc/mdl302] [Citation(s) in RCA: 151] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Despite several investigations, second malignancy risks (SMR) following radiotherapy alone (RT), chemotherapy alone (CT) and combined chemoradiotherapy (CRT) for Hodgkin's lymphoma (HL) remain controversial. PATIENTS AND METHODS We sought individual patient data from randomised trials comparing RT versus CRT, CT versus CRT, RT versus CT or involved-field (IF) versus extended-field (EF) RT for untreated HL. Overall SMR (including effects of salvage treatment) were compared using Peto's method. RESULTS Data for between 53% and 69% of patients were obtained for the four comparisons. (i) RT versus CRT (15 trials, 3343 patients): SMR were lower with CRT than with RT as initial treatment (odds ratio (OR) = 0.78, 95% confidence interval (CI) = 0.62-0.98 and P = 0.03). (ii) CT versus CRT (16 trials, 2861 patients): SMR were marginally higher with CRT than with CT as initial treatment (OR = 1.38, CI 1.00-1.89 and P = 0.05). (iii) IF-RT versus EF-RT (19 trials, 3221 patients): no significant difference in SMR (P = 0.28) although more breast cancers occurred with EF-RT (P = 0.04 and OR = 3.25). CONCLUSIONS Administration of CT in addition to RT as initial therapy for HL decreases overall SMR by reducing relapse and need for salvage therapy. Administration of RT additional to CT marginally increases overall SMR in advanced stages. Breast cancer risk (but not SMR in general) was substantially higher after EF-RT. Caution is needed in applying these findings to current therapies.
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Mauch P, Ng A, Aleman B, Carde P, Constine L, Diehl V, Dinshaw K, Gospodarowicz M, Hancock S, Hodgson D, Hoppe R, Liang R, Loeffler M, Specht L, Travis LB, Wirth A, Yahalom J. Report from the Rockefellar Foundation Sponsored International Workshop on reducing mortality and improving quality of life in long-term survivors of Hodgkin's disease: July 9-16, 2003, Bellagio, Italy. Eur J Haematol 2005:68-76. [PMID: 16007872 DOI: 10.1111/j.1600-0609.2005.00458.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A workshop, sponsored by the Rockefellar Foundation, was held between 9 to 16 July, 2003 to devise strategies to reduce mortality and improve quality of life of long-term survivors of Hodgkin's disease. Participants were selected for their clinical and research background on late effects after Hodgkin's disease therapy. Experts from both developed and developing nations were represented in the workshop, and efforts were made to ensure that the proposed strategies would be globally applicable whenever possible. The types of late complications, magnitude of the problem, contributing risk factors, methodology to assess the risk, and challenges faced by developing countries were presented. The main areas of late effects of Hodgkin's disease discussed were as follows: second malignancy, cardiac disease, infection, pulmonary dysfunction, endocrine abnormalities, and quality of life. This report summarizes the findings of the workshop, recommendations, and proposed research priorities in each of the above areas.
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Kun LE, Ang K, Erickson B, Harris J, Hoppe R, Leibel S, Davis L, Hattery R. Maintenance of Certification for Radiation Oncology. Int J Radiat Oncol Biol Phys 2005; 62:303-8. [PMID: 15890568 DOI: 10.1016/j.ijrobp.2005.01.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2004] [Accepted: 01/13/2005] [Indexed: 11/27/2022]
Abstract
Maintenance of Certification (MOC) recognizes that in addition to medical knowledge, several essential elements involved in delivering quality care must be developed and maintained throughout one's career. The MOC process is designed to facilitate and document professional development of American Board of Radiology (ABR) diplomates in the essential elements of quality care in Radiation Oncology and Radiologic Physics. ABR MOC has been developed in accord with guidelines of the American Board of Medical Specialties. All Radiation Oncology certificates issued since 1995 are 10-year, time-limited certificates; diplomates with time-limited certificates who wish to maintain specialty certification must complete specific requirements of the American Board of Radiology MOC program. Diplomates with lifelong certificates are not required to participate but are strongly encouraged to do so. Maintenance of Certification is based on documentation of participation in the four components of MOC: (1) professional standing, (2) lifelong learning and self-assessment, (3) cognitive expertise, and (4) performance in practice. Through these components, MOC addresses six competencies-medical knowledge, patient care, interpersonal and communication skills, professionalism, practice-based learning and improvement, and systems-based practice. Details of requirements for components 1, 2, and 3 of MOC are outlined along with aspects of the fourth component currently under development.
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Flores MG, Holm B, Larson MJ, Lau MK, Si MS, Lowsky R, Rousvoal G, Grumet FC, Strober S, Hoppe R, Reitz BA, Borie DC. A technique of bone marrow collection from vertebral bodies of cynomolgus macaques for transplant studies. J Surg Res 2005; 124:280-8. [PMID: 15820259 DOI: 10.1016/j.jss.2004.09.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2004] [Indexed: 01/09/2023]
Abstract
BACKGROUND Strategies to induce donor-specific allograft tolerance are best tested in preclinical models developed in nonhuman primates (NHPs). Most protocols prepare the recipient by infusing hematopoietic cells from the donor. We report here a procedure to isolate and characterize large numbers of bone marrow cells (BMCs) from cynomolgus monkeys (cynos) that can then successfully be transplanted into conditioned recipients. MATERIALS AND METHODS Vertebral columns of five cynos were excised en bloc and separated into individual vertebrae. The cancelous bone was extracted with a core puncher, fractionated, filtered, centrifuged, and resuspended in transplantation media before being analyzed by flow cytometry. In two instances, the collected BMCs were reinfused into allogeneic recipients preconditioned with a nonmyeloablative regimen. Chimerism was monitored using short-tandem repeat analysis. RESULTS The mean total BMCs yield was 25.5 x 10(9) (range of 4.00 x 10(9) to 59 x 10(9)) with mean cell viability of 93.4% (range: 90-96%). CD34+ cells and CD3+ cells averaged 0.34 and 3.91% of total BMCs, respectively. This resulted in absolute cell number yields of 1.02 x 10(8) and 1.15 x 10(9) for CD34+ and CD3+ cells, respectively. Graft-versus-host disease was absent in both bone marrow infused animals, and a maximum level of chimerism of 18% was detected at 3 weeks after BMCs infusion. CONCLUSION We present here the first detailed report of a procedure to retrieve and characterize large numbers of BMCs from vertebral bodies of cynos and demonstrate that cells collected with this technique have the capability of engrafting in allogenic recipients.
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Sundram U, Kim Y, Mraz-Gernhard S, Hoppe R, Natkunam Y, Kohler S. Expression of the bcl-6 and MUM1/IRF4 proteins correlate with overall and disease-specific survival in patients with primary cutaneous large B-cell lymphoma: a tissue microarray study. J Cutan Pathol 2005; 32:227-34. [PMID: 15701085 DOI: 10.1111/j.0303-6987.2005.00298.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Systemic B-cell lymphomas have been studied using microarrays, which has led to a better understanding of their molecular characteristics. Initial microarray studies of these lymphomas have implicated several genes as important predictors of outcome. In this study, we used a tissue microarray (TMA) to characterize primary cutaneous large B-cell lymphomas (PCLBCL). METHODS We studied 14 patients for whom clinical follow up was available, including four patients whose lesions were limited to the leg on presentation. Immunohistochemical staining with CD20, CD44, CD21, CD5, CD10, bcl-2, bcl-6, Ki67, p53, and multiple myeloma 1 (MUM1) was examined. RESULTS Our results identify two subgroups of lymphomas. The first group showed staining with bcl-6 and had an overall survival of 176 months (p = 0.003). The majority of this group was negative for MUM1. The second group lacked staining with bcl-6 and had an overall survival of 26 months, with a majority of these cases staining with MUM1. Three of four patients with PCLBCL of the leg showed no staining with bcl-6. CONCLUSIONS Our study demonstrates the utility of TMAs in the analysis of PCLBCL and that expression of bcl-6 and MUM1 correlates with survival.
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MESH Headings
- Adult
- Aged
- Aged, 80 and over
- Biomarkers, Tumor/metabolism
- California/epidemiology
- DNA-Binding Proteins/metabolism
- Female
- Humans
- Immunoenzyme Techniques
- Interferon Regulatory Factors
- Lymphoma, B-Cell/metabolism
- Lymphoma, B-Cell/mortality
- Lymphoma, B-Cell/pathology
- Lymphoma, Large B-Cell, Diffuse/metabolism
- Lymphoma, Large B-Cell, Diffuse/mortality
- Lymphoma, Large B-Cell, Diffuse/pathology
- Male
- Middle Aged
- Proto-Oncogene Proteins c-bcl-6
- Skin Neoplasms/metabolism
- Skin Neoplasms/mortality
- Skin Neoplasms/pathology
- Survival Rate
- Tissue Array Analysis
- Transcription Factors/metabolism
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Gaebell HC, Meyer G, Hoppe R. Über Chloroargentate(I): CsAgCl2
und schwarzes CsAgCl2+X. Z Anorg Allg Chem 2004. [DOI: 10.1002/zaac.19834970219] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Brazel B, Hoppe R. “Fragmentierung” und “Aggregation” bei Bleioxiden Über das Oligooxoplumbat(IV) K2
Li6
[Pb2
O8
]. Z Anorg Allg Chem 2004. [DOI: 10.1002/zaac.19834970216] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Beynet DP, Wee SA, Horwitz SS, Kohler S, Horning S, Hoppe R, Kim YH. Clinical and pathological features of posttransplantation lymphoproliferative disorders presenting with skin involvement in 4 patients. ACTA ACUST UNITED AC 2004; 140:1140-6. [PMID: 15381556 DOI: 10.1001/archderm.140.9.1140] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Posttransplantation lymphoproliferative disorders (PTLDs) are lymphoid proliferations that can develop in recipients of solid organ or allogeneic bone marrow transplants. They are clinically and pathologically heterogeneous and range from polyclonal hyperplastic lesions to malignant lymphomas. Although extranodal involvement in PTLD is common, cutaneous presentation is rare, with only 19 cases reported previously. OBSERVATIONS We describe 4 patients with cutaneous presentations of PTLD. All patients had relatively late-onset PTLD (>1 year after transplantation) with a median of 8 years from organ allograft to tumor diagnosis. The extent, number, and anatomic location of skin lesions varied from a localized patch to widespread nodules. None of the patients exhibited systemic symptoms at the time of PTLD diagnosis. Pathological findings ranged from plasmacytic hyperplasia to monomorphic PTLD. In situ hybridization detected Epstein-Barr virus messenger RNA in all 3 cases with evaluable tissue. All patients underwent reduction in immunosuppressive therapy and received other individualized treatments. Median follow-up was 2.5 years. At the most recent follow-up, 3 patients were in complete remission and 1 had residual disease. CONCLUSIONS In this study, PTLD lesions presenting in the skin responded to therapy. Despite their relatively late occurrence after transplantation, most of these cases were positive for Epstein-Barr virus. As observed with other cutaneous lymphomas, the PTLDs with predominant skin involvement had a relatively favorable outcome.
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Lau M, Vayntrub T, Grumet FC, Lowsky R, Strober S, Hoppe R, Larson M, Holm B, Reitz B, Borie D. Short tandem repeat analysis to monitor chimerism in macaca fascicularis. Am J Transplant 2004; 4:1543-8. [PMID: 15307845 DOI: 10.1111/j.1600-6143.2004.00529.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Chimerism assessment following bone marrow transplantation (BMT) in cynomolgus monkeys (cynos) has been hampered by the lack of good engraftment markers. In human BMT, such markers have been provided by short tandem repeat (STR) loci. We tested the idea that techniques effective for detecting human STR could be readily adapted to cynos. Genomic DNA was extracted from cyno unseparated blood or peripheral cell subsets. With only slight modifications, reagents for detecting human STR alleles were used to amplify and detect cyno STRs and to quantitate allelic mixtures on an automated sequencer. Of the 15 STR loci tested, only CSF1PO, D18S51, and FGA successfully amplified, with seven, seven and two alleles, respectively. CSF1PO and D18S51 heterozygosity (80% and 55%, respectively) allowed use of these two loci for chimerism quantitation after BMT. The successful adaptation of human STR reagents to monitor chimerism in transplanted cynos will facilitate the use of this species in preclinical tolerance studies.
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Padro D, Jennings V, Smith ME, Hoppe R, Thomas PA, Dupree R. Variations of Titanium Interactions in Solid State NMRCorrelations to Local Structure. J Phys Chem B 2002. [DOI: 10.1021/jp021583x] [Citation(s) in RCA: 64] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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47
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Nespolo M, Ferraris G, Hoppe R. Analysis of inorganic structures through the charge distribution method: recent extensions. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302086385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Chin C, Hunt S, Robbins R, Hoppe R, Reitz B, Bernstein D. Long-term follow-up after total lymphoid irradiation in pediatric heart transplant recipients. J Heart Lung Transplant 2002; 21:667-73. [PMID: 12057700 DOI: 10.1016/s1053-2498(01)00772-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Total lymphoid irradiation (TLI) is used to treat recurrent allograft rejection. Short-term success and complication rates have been reported in pediatric and adult cardiac transplant populations. We report the long-term efficacy and safety of TLI in treating intractable rejection in pediatric patients. METHODS Eight pediatric patients were treated with TLI (7 for recurrent rejection, 1 for risk of medication non-compliance). Therapy consisted of a mid-plane dose of 8 Gy administered with a 6-MeV linear accelerator using an anterior-posterior opposed technique. We reviewed outcomes for a total of 40 patient-years of follow-up. RESULTS We encountered rejection (>Grade 2 by International Society for Heart and Lung Transplantation criteria) in 56.7% +/- 34.7% of biopsies performed within 90 days before TLI. Rejection rates dropped to 3.1% +/- 8.8% within the first 90 days (p < 0.005) after therapy and remained low at 5.6% +/- 1.3% (p < 0.05) during the first year after completion of TLI. Median time from TLI to the first subsequent rejection episode was 305 days (range, 77-1,920 days). Long-term follow-up (>3 years) of 5 patients demonstrated a continuing low incidence of rejection. Non-Hodgkin's lymphoma was diagnosed in 1 of 8 patients, graft coronary artery disease in 4 of 8 patients, and restrictive cardiomyopathy in 1 of 8 patients after TLI. CONCLUSIONS Total lymphoid irradiation is an effective treatment for recurrent rejection and has short- and long-term efficacy. Morbid events may include cancer, graft coronary artery disease, and restrictive cardiomyopathy.
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Ehrl M, Kindervater HW, Deeg FW, Braeuchle C, Hoppe R. Optical spectroscopy of thiazine and oxazine dyes in the cages of hydrated and dehydrated faujasite-type zeolites: molecular dynamics in a nanostructured environment. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100096a021] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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Nespolo M, Ferraris G, Ivaldi G, Hoppe R. Charge distribution as a tool to investigate structural details. II. Extension to hydrogen bonds, distorted and hetero-ligand polyhedra. ACTA CRYSTALLOGRAPHICA SECTION B: STRUCTURAL SCIENCE 2001; 57:652-64. [PMID: 11574721 DOI: 10.1107/s0108768101009879] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2001] [Accepted: 06/14/2001] [Indexed: 11/10/2022]
Abstract
It is shown that one of the main reasons for most failures of the methods for calculating distance-dependent bond strengths is related to the distortion of the coordination polyhedra. The charge distribution (CD) method which depends on only one universal empirical parameter (contraction parameter) is modified to include: (i) an iterative calculation of the effective coordination number (ECoN), to deal with structures containing very distorted coordination polyhedra; (ii) a specific contraction parameter to treat structures containing any type of hydrogen bond; (iii) scale factors for coordination subshells, to treat structures with hetero-ligand polyhedra. The contraction parameter for the hydrogen bonds was obtained from 119 well refined structures based on neutron diffraction data. Examples of the application of the iterative charge distribution (CD-IT) are presented to show the efficiency of the new method in dealing with distorted (including hydrogen bonding) and hetero-ligand polyhedra. In particular, analysis of a series of 74 structures with pentacoordinated cations shows that deviations from overall trends are related to structure instability. The possible failure of the method with polyionic structures and 'dynamic' structures is discussed.
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