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Torrero MN, Larson D, Hübner MP, Mitre E. CD200R surface expression as a marker of murine basophil activation. Clin Exp Allergy 2008; 39:361-9. [PMID: 19134017 DOI: 10.1111/j.1365-2222.2008.03154.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Basophils are increasingly recognized as playing important roles in the immune responses of allergic diseases and helminth infections. One of the main obstacles to studying basophils has been the lack of a simple and rapid assay to measure basophil activation in mice. OBJECTIVE The purpose of this study was to develop an assay to measure murine basophil activation. METHODS Mouse blood cells were stained with various combinations of positive and negative markers for basophils--sorted and then assessed for basophil purity by May-Grünwald staining of cytospins. Once a flow cytometric strategy for staining basophils was determined, basophil surface expression of CD200R was assessed by multi-colour flow cytometry after stimulation of whole blood with anti-IgE, ionomycin or N-formyl MetLeuPhe (fMLP). Confirmation of basophil activation was assessed by concomitant staining of cells for intracellular IL-4. To test the ability of flow cytometric basophil CD200R measurements to assess for antigen-specific IgE-mediated activation of basophils, surface CD200R expression in response to in vitro stimulation with media alone, helminth antigen or ovalbumin was measured on basophils obtained from control mice, mice infected with helminths and mice sensitized to ovalbumin. RESULTS Using anti-IgE-FITC as a positive marker and a combination of anti-CD4-PERCP and anti-B220-PERCP as negative markers resulted in a well-separated basophil population. Additional staining with anti-CD200R-PE demonstrated that (1) basophil CD200R expression increases in response to anti-IgE, ionomycin and fMLP, (2) most CD200R-positive basophils also stain positively for IL-4 and (3) CD200R expression increases after antigen-specific activation of basophils in murine models of helminth disease and allergy. CONCLUSION We developed a multi-colour flow cytometry assay that measures murine basophil activation by utilizing CD200R as an activation marker. This assay is straightforward and rapid, taking approximately half a day for obtaining blood, in vitro stimulation and flow cytometric analysis.
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Aiken AH, Chang SM, Larson D, Butowski N, Cha S. Longitudinal Magnetic Resonance Imaging Features of Glioblastoma Multiforme Treated With Radiotherapy With or Without Brachytherapy. Int J Radiat Oncol Biol Phys 2008; 72:1340-6. [DOI: 10.1016/j.ijrobp.2008.02.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2007] [Revised: 02/26/2008] [Accepted: 02/26/2008] [Indexed: 10/22/2022]
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128
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Sahgal A, Gibbs I, Ryu S, Ma L, Gerszten P, Soltys S, Weinberg V, Fowler J, Chang E, Larson D. Preliminary Guidelines for Avoidance of Radiation-induced Myelopathy Following Spine Stereotactic Body Radiosurgery (SBRS). Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.678] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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129
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Sahgal A, Chuang C, Larson D, Huang K, Petti P, Weinstein P, Ma L. Split-Volume Treatment Planning of Multiple Consecutive Vertebral Body Metastases for Cyberknife Image-Guided Robotic Radiosurgery. Med Dosim 2008; 33:175-9. [DOI: 10.1016/j.meddos.2007.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2007] [Revised: 04/27/2007] [Accepted: 04/27/2007] [Indexed: 10/21/2022]
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130
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Yousif N, Larson D. The Apron Technique of Reduction Mammaplasty: Elimination of the Vertical Scar. Semin Plast Surg 2008. [DOI: 10.1055/s-2008-1080325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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131
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Yousif N, Larson D. Evolution of the Revolution in Head and Neck Reconstruction. Semin Plast Surg 2008. [DOI: 10.1055/s-2008-1080364] [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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132
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Yousif N, Larson D. The Last Word. Semin Plast Surg 2008. [DOI: 10.1055/s-2008-1080327] [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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133
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Yousif N, Larson D. The Last Word. Semin Plast Surg 2008. [DOI: 10.1055/s-2008-1080366] [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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134
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Ma L, Hossain S, Descovich M, Chuang C, Verhey L, Shrieve D, Larson D. SU-EE-A2-01: A General Formula Predicting Near-Target Dose Fall-Off Characteristics for Different Isocentric and Non-Isocentric Delivery Modalities. Med Phys 2008. [DOI: 10.1118/1.2961380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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135
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DeVuyst EA, Bauer ML, Cheng FC, Mitchell J, Larson D. The impact of a leptin gene SNP on beef calf weaning weights. Anim Genet 2008; 39:284-6. [DOI: 10.1111/j.1365-2052.2008.01730.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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136
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Chuang CF, Chan AA, Larson D, Verhey LJ, McDermott M, Nelson SJ, Pirzkall A. Potential value of MR spectroscopic imaging for the radiosurgical management of patients with recurrent high-grade gliomas. Technol Cancer Res Treat 2008; 6:375-82. [PMID: 17877425 DOI: 10.1177/153303460700600502] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Previous studies have shown that metabolic information provided by 3D Magnetic Resonance Spectroscopy Imaging (MRSI) could affect the definition of target volumes for radiation treatments (RT). This study aimed to (i) investigate the effect of incorporating spectroscopic volumes as determined by MRSI on target volume definition, patient selection eligibility, and dose prescription for stereotactic radiosurgery treatment planning; (ii) correlate the spatial extent of pre-SRS spectroscopic abnormality and treatment volumes with areas of focal recurrence as defined by changes in contrast enhancement; and (iii) examine the metabolic changes following SRS to assess treatment response. Twenty-six patients treated with Gamma Knife radiosurgery for recurrent glioblastoma multiforme (GBM) were retrospectively evaluated. All patients underwent both MRI and MRSI studies prior to SRS. Follow-up MRI exams were available for all 26 patients, with MRI/MRSI available in only 15/26 patients. We observed that the initial CNI 2 contours extended beyond the pre-SRS CE in 25/26 patients ranging in volume from 0.8 cc to 18.8 cc (median 5.6 cc). The inclusion of the volume of CNI 2 extending beyond the CE would have increased the SRS target volume by 5-165% (median 23.4%). This would have necessitated decreasing the SRS prescription dose in 19/26 patients to avoid increased toxicity; the resultant treatment volume would have exceeded 20cc in five patients, thus possibly excluding those from RS treatment per our institutional practice. MRSI follow-up studies showed a decrease in Choline, stable Creatine, and increased NAA indicative of response to SRS in the majority of patients. When combined with patient survival data, metabolic information obtained during follow-up MRSI studies seemed to indicate the potential to help to distinguish necrosis from new/recurrent tumor; however, this should be further verified by biopsy studies.
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Sahgal A, Chou D, Ames C, Ma L, Chuang C, Lamborn K, Huang K, Chin C, Weinstein P, Larson D. Proximity of Spinous/Paraspinous Radiosurgery Metastatic Targets to the Spinal Cord Versus Risk of Local Failure. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.1240] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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138
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Chuang C, Sahgal A, Lee L, Larson D, Huang K, Petti P, Verhey L, Ma L. Effects of residual target motion for image-tracked spine radiosurgery. Med Phys 2007; 34:4484-90. [DOI: 10.1118/1.2790587] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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139
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140
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Ma L, Larson D, Petti P, Chuang C, Verhey L. Boosting Central Target Dose by Optimizing Embedded Dose Hot Spots for Gamma Knife Radiosurgery. Stereotact Funct Neurosurg 2007; 85:259-63. [PMID: 17709977 DOI: 10.1159/000107357] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AIMS To develop a boost technique for Gamma Knife radiosurgery by embedding and optimizing dose hot spots inside a conventional Gamma Knife plan. METHODS An optimization algorithm was developed to automatically arrange the pattern and adjust the intensities of the embedded dose hot spots. We compared the treatment plans of the optimized boost technique with the conventional Gamma Knife treatment plans, where dose hot spots were scattered randomly within the target volume. RESULTS We found the embedded boost plans significantly increased the maximum dose of the target (on average 31% or 5-6 Gy). The mean dose to the target was increased by an averaged 7.1% (1.5-2 Gy). In contrast, the dose to the adjacent normal brain was strictly maintained with the dose volume histograms differing less than 0.5% between the boost treatment plans and the conventional treatment plans. The planning effort and treatment time was comparable between the two techniques. CONCLUSION We have demonstrated a simple and an effective technique for increasing the central target dose without affecting the normal brain sparing for Gamma Knife radiosurgery.
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Ellrodt G, Sadwin LB, Aversano T, Brodie B, O'Brien PK, Gray R, Hiratzka LF, Larson D. Development of Systems of Care for ST-Elevation Myocardial Infarction Patients. Circulation 2007; 116:e49-54. [PMID: 17538040 DOI: 10.1161/circulationaha.107.184048] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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142
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Ma L, Sahgal A, Larson D, Chuang C, Petti P, Verhey L. SU-FF-T-13: A Generalized Biologically Equivalent Dose (gBED) Model and Its Application for Radiosurgery and Hypofractionated Body Radiotherapy. Med Phys 2007. [DOI: 10.1118/1.2760658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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143
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Menssen K, Henry T, Unger B, Oelfke J, Kapsner C, Larson D. Use of Emergency Medical Services by Patients with ST-Elevation Myocardial Infarction in a Regional Network. Acad Emerg Med 2007. [DOI: 10.1197/j.aem.2007.03.753] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Larson D, Menssen K, Herold M, Henry T, Unger B, Parpart M, Sharkey S. Stress Cardiomyopathy Mimicking Acute ST-segment Elevation Myocardial Infarction. Acad Emerg Med 2007. [DOI: 10.1197/j.aem.2007.03.1042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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145
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Stewart VA, McGrath SM, Dubois PM, Pau MG, Mettens P, Shott J, Cobb M, Burge JR, Larson D, Ware LA, Demoitie MA, Weverling GJ, Bayat B, Custers JHHV, Dubois MC, Cohen J, Goudsmit J, Heppner DG. Priming with an adenovirus 35-circumsporozoite protein (CS) vaccine followed by RTS,S/AS01B boosting significantly improves immunogenicity to Plasmodium falciparum CS compared to that with either malaria vaccine alone. Infect Immun 2007; 75:2283-90. [PMID: 17307942 PMCID: PMC1865796 DOI: 10.1128/iai.01879-06] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The RTS,S/AS02A protein-based vaccine consistently demonstrates significant protection against infection with Plasmodium falciparum malaria and also against clinical malaria and severe disease in children in areas of endemicity. Here we demonstrate with rhesus macaques that priming with a replication-defective human adenovirus serotype 35 (Ad35) vector encoding circumsporozoite protein (CS) (Ad35.CS), followed by boosting with RTS,S in an improved MPL- and QS21-based adjuvant formulation, AS01B, maintains antibody responses and dramatically increases levels of T cells producing gamma interferon and other Th1 cytokines in response to CS peptides. The increased T-cell responses induced by the combination of Ad35.CS and RTS,S/AS01B are sustained for at least 6 months postvaccination and may translate to improved and more durable protection against P. falciparum infection in humans.
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Ronsheim P, McMurray J, Flaitz P, Parks C, Thompson K, Larson D, Kelly TF, Seiler DG, Diebold AC, McDonald R, Garner CM, Herr D, Khosla RP, Secula EM. Analysis of Nickel Silicides by SIMS and LEAP. ACTA ACUST UNITED AC 2007. [DOI: 10.1063/1.2799356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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147
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Ma L, Larson D, Petti P, Chuang C, Verhey L. SU-FF-T-348: Optimize Spike Patterns For An Embedded Boost Technique For Gamma Knife Radiosurgery. Med Phys 2006. [DOI: 10.1118/1.2241270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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148
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McDermott MW, Larson D. Conformal Radiation for Benign Intracranial Tumors. Neurosurg Clin N Am 2006. [DOI: 10.1016/j.nec.2006.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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149
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Petti P, Coleman J, McDermott M, Larson D. Anatomic Landmarks vs Fiducials for Staged Gamma Knife Radiosurgery for Large Arteriovenous Malformations. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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150
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Hassan I, Nelson H, Larson D, Cima R, Dozois E, Young-Fadok T. Expansion of a laparoscopic colon and rectal surgery practice does not adversely affect patient and practice outcomes. J Am Coll Surg 2005. [DOI: 10.1016/j.jamcollsurg.2005.06.163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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