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Sun C, Lin H, Yu W, Li X, Chen Y, Qiu X, Wang R, Dai Y. Neurotrophic effect of bone marrow mesenchymal stem cells for erectile dysfunction in diabetic rats. ACTA ACUST UNITED AC 2012; 35:601-7. [PMID: 22428616 DOI: 10.1111/j.1365-2605.2012.01250.x] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
It has been demonstrated that intracavernous injection of bone marrow-derived mesenchymal stem cells (BM-MSCs) had beneficial effects on improving erectile function in type-1 diabetic rats. This study was designed to investigate the neurotrophic effect of BM-MSCs for type-1 diabetic rats. Streptozocin-induced type-1 diabetic rats were randomly divided into three groups: diabetic group, BM-MSCs-treated group and BM-MSCs-conditioned medium-treated group. At the 3d, 1 and 2w time points after BM-MSCs injection, three randomly selected rats in MSCs group were sacrificed and penile samples were harvested to detect BM-MSCs in penile tissue. Four weeks after intracavernous injection of BM-MSCs or BM-MSCs-conditioned medium, intracavernous pressure (ICP) was assessed to evaluate the erectile function. Immunohistochemistry was used to track labelled BM-MSCs in penile tissue and to detect neuronal nitric oxide synthase (nNOS) and neurofilament (NF) positive fibres in penile dorsal nerve. Enzyme lined immunosorbent assay (ELISA) was used to measure the concentrations of vascular endothelial growth factor (VEGF), nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) in BM-MSCs-conditioned medium. BM- MSCs secreted detectable levels of VEGF, BDNF and NGF. Intracavernous injection of BM-MSCs improved erectile function in diabetic rats. The functional improvement was accompanied by promoted nNOS and NF positive nerve fibres within penile dorsal nerve in type-1 diabetic rats. Histological data revealed a time-dependent decrease in the number of BM-MSCs in the corpus cavernosum following injection. Furthermore, the beneficial effect of BM-MSCs was partially repeated by BM-MSCs-conditioned medium. Intracavernous injection of BM-MSCs is effective in improving nerve regeneration in diabetic rats. Paracrine effects of BM-MSCs are probably involved in the improvement.
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Sun C, Shen Y, Sun D, Hang T, Tu J. Method Development and Validation for the Determination of Indiquinoline Tartrate, a Novel Kappa Opioid Agonist, and its Related Substances by High-Performance Liquid Chromatography. J Chromatogr Sci 2012; 50:343-8. [DOI: 10.1093/chromsci/bms007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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278
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Liu X, Sun C, Zang H, Wang W, Guo R, Wang F. Capillary Electrophoresis for Simultaneous Analysis of Heparin, Chondroitin Sulfate and Hyaluronic Acid and its Application in Preparations and Synovial Fluid. J Chromatogr Sci 2012; 50:373-9. [DOI: 10.1093/chromsci/bms015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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279
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Gershenson D, Sun C, Iyer R, Wong K, Kavanagh J, Malpica A, Schmeler K, Bodurka D, Deavers M. Hormonal therapy for recurrent low-grade serous carcinoma of the ovary or peritoneum. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.080] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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280
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Sun C, Jhingran A, Gallegos J, Bodurka D, Frumovitz M, Ramondetta L. Longitudinal quality of life in medically underserved women with locally advanced cervical cancer. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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281
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Westin S, Sun C, Broaddus R, Pal N, Nath V, Urbauer D, Schmeler K, Lu K, Bodurka D, Johnston T. Prospective phase II trial of the Levonorgestrel Intrauterine System (Mirena) to treat complex atypical hyperplasia and grade 1 endometrioid endometrial cancer. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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282
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Worley M, Anwandter C, dos Reis R, Sun C, Nick A, Frumovitz M, Soliman P, Schmeler K, Levenback C, Ramirez P. Impact of surgeon volume on patient safety in laparoscopic gynecologic surgery. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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283
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Holman L, Lu K, Hernandez M, Bast R, Bodurka D, Skates S, Gershenson D, Sun C. Perception of risk, cancer worry, anxiety, and acceptability of screening among low-risk women undergoing ovarian cancer screening with the risk of ovarian cancer algorithm. Gynecol Oncol 2012. [DOI: 10.1016/j.ygyno.2011.12.281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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284
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Moore AS, Faisal A, Gonzalez de Castro D, Bavetsias V, Sun C, Atrash B, Valenti M, de Haven Brandon A, Avery S, Mair D, Mirabella F, Swansbury J, Pearson ADJ, Workman P, Blagg J, Raynaud FI, Eccles SA, Linardopoulos S. Selective FLT3 inhibition of FLT3-ITD+ acute myeloid leukaemia resulting in secondary D835Y mutation: a model for emerging clinical resistance patterns. Leukemia 2012; 26:1462-70. [PMID: 22354205 PMCID: PMC3523391 DOI: 10.1038/leu.2012.52] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Acquired resistance to selective FLT3 inhibitors, is an emerging clinical problem in the treatment of FLT3-ITD+ acute myeloid leukaemia (AML). The paucity of valid pre-clinical models has limited investigations to determine the mechanism of acquired therapeutic resistance, thereby limiting the development of effective treatments. We generated selective FLT3 inhibitor-resistant cells by treating the FLT3-ITD+ human AML cell line MOLM-13 in vitro with the FLT3-selective inhibitor MLN518, and validated the resistant phenotype in vivo and in vitro. The resistant cells, MOLM-13-RES, harboured a new D835Y tyrosine kinase domain (TKD) mutation on the FLT3-ITD+ allele. Acquired TKD mutations, including D835Y, have recently been identified in FLT3-ITD+ patients relapsing after treatment with the novel FLT3 inhibitor, AC220. Consistent with this clinical pattern of resistance, MOLM-13- RES cells displayed high relative resistance to AC220 and Sorafenib. Furthermore, treatment of MOLM-13-RES cells with AC220 lead to loss of the FLT3 wild type allele and duplication of the FLT3-ITD-D835Y allele. Our FLT3-Aurora kinase inhibitor, CCT137690, successfully inhibited growth of FLT3-ITD-D835Y cells in vitro and in vivo, suggesting that dual FLT3-Aurora inhibition may overcome selective FLT3 inhibitor resistance, in part due to inhibition of Aurora kinase, and may benefit patients with FLT3-mutated AML.
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285
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Sun C, Clarke S, Brewer A, Li B, Parker J, Demmel F. The structures of 1-bromoheptane and 1-bromononane monolayers adsorbed on the surface of graphite. Mol Phys 2012. [DOI: 10.1080/00268976.2011.640290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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286
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Yang S, Bo J, Hu H, Guo X, Tian R, Sun C, Zhu Y, Li P, Liu P, Zou S, Huang Y, Li Z. Derivation of male germ cells from induced pluripotent stem cells in vitro and in reconstituted seminiferous tubules. Cell Prolif 2012; 45:91-100. [PMID: 22324506 DOI: 10.1111/j.1365-2184.2012.00811.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Accepted: 12/29/2011] [Indexed: 01/15/2023] Open
Abstract
OBJECTIVES Previous studies have demonstrated that mouse- and human-induced pluripotent stem (iPS) cells can differentiate into primordial germ cells in vitro. However, up to now it is not known whether iPS cells would be able to differentiate into male germ cells in vivo. The aim of this study was to explore differentiation potential of iPS cells to male germ cells in vitro and in vivo. MATERIALS AND METHODS In this study, approaches using in vitro retinoic acid induction and in vivo ectopic transplantation were combined to induce iPS cells to become male germ cells. RESULTS RT-PCR showed that expression of pre-meiotic and meiotic germ cell-specific genes was enhanced in iPS cell-derived embryoid bodies (EBs) compared to mRNA transcripts of iPS cells. Immunofluorescence analysis revealed that iPS cell-derived EBs positively expressed germ-cell markers VASA, c-Kit and SCP3. Furthermore, iPS cell-derived cells dissociated from EBs were injected with testicular cells into dorsal skin of mice. Histological examination showed that iPS cell-derived cells could reconstitute seminiferous tubules, and meanwhile, iPS cell-derived germ cells could settle at basement membranes of reconstituted tubules. CONCLUSION Our results suggest that iPS cells are able to differentiate into male germ cells in vitro and that reconstituted seminiferous tubules may provide a functional niche for exogenous iPS cell-derived male germ cells. Derivation of male germ cells from iPS cells has potential application for treating male infertility and provides an ideal platform for elucidating molecular mechanisms of male germ-cell development.
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287
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Shi G, Chen Z, Teng J, Bi C, Zhou D, Sun C, Li Y, Xu S. Fluxes, variability and sources of cadmium, lead, arsenic and mercury in dry atmospheric depositions in urban, suburban and rural areas. ENVIRONMENTAL RESEARCH 2012; 113:28-32. [PMID: 22280823 DOI: 10.1016/j.envres.2012.01.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 12/21/2011] [Accepted: 01/04/2012] [Indexed: 05/09/2023]
Abstract
In China's largest city, Shanghai, dry deposition fluxes of Cd, Pb, As and Hg were 137, 19354, 2897 and 9.4 μgm(-2)a(-1), respectively in an urban area, intermediate in a suburban area, and 51.7, 5311, 1703 and 7.3 μgm(-2)a(-1), respectively in a rural area. Enrichment factors were Cd>Pb>As>Hg. Seasonal variations of metals differed: Pb and As were dominated by fossil fuel combustion, Cd was related to industrial pollution, and natural source controlled Hg levels.
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288
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Li M, Huang X, Chen G, Cai J, Zhang H, Sun C, Zhao J, Liu S, Fu S. Laser-driven plasma loader and solid matter ramp compression experiments on SG-II Laser. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20122601034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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289
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Carpenter C, Pratx G, Sun C, Xing L. Toward Molecular Image-guidance for Intraoperative Breast Radiotherapy. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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290
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Zhu P, Jiang F, Yu H, Zheng W, Lin F, Lin H, Sun C. Effects of Telmisartan and Pyridoxamine on vascular smooth muscle cells from rat abdominal aorta vascular. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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291
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Zhu P, Chen J, Yu H, Lin F, Lin H, Sun C. Effect of pyridoxamine and telmisartan on tubular epithelial cells proliferation and its mechanism. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.97] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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292
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Deng Z, Lin F, Yu H, Lin H, Sun C, Zhu P. Effects of pyridoxamine on preliferation of rat vascular smooth muscle cells. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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293
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Chen S, Luo H, Li Y, Sun Y, Wu Q, Niu Y, Song J, Lv A, Zhu Y, Sun C, Steinmetz A, Qian Z. 454 EST analysis detects genes putatively involved in ginsenoside biosynthesis in Panax ginseng. PLANT CELL REPORTS 2011; 30:1593-1601. [PMID: 21484331 DOI: 10.1007/s00299-011-1070-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 03/29/2011] [Accepted: 04/01/2011] [Indexed: 05/28/2023]
Abstract
Panax ginseng C.A. Meyer is one of the most highly valued medicinal plants in the world. To analyze the transcriptome of P. ginseng and discover the genes involved in ginsenoside biosynthesis, cDNAs derived from the total RNA of 11-year-old, wood-grown P. ginseng roots were analyzed by 454 sequencing. A total of 217,529 high quality reads (expressed sequence tags, ESTs), with an average length of 409 bases, were generated from a one-quarter run to yield 31,741 unique sequences. The majority (20,198; 63.6%) of the unique sequences were annotated using BLAST similarity searches. A total of 16,810 and 16,577 unique sequences were assigned to functional classifications and biochemical pathways based on Gene Ontology analysis and the Kyoto Encyclopedia of Genes and Genomes assignment, respectively. Nine genes involved in the biosynthesis of ginsenoside skeletons and many candidate genes putatively responsible for modification of the skeletons, including 133 cytochrome P450s and 235 glycosyltransferases, were identified. From these candidates, six transcripts encoding UDP-glycosyltransferases that were most likely to be involved in ginsenoside biosynthesis were selected. These results open a new avenue by which to explore and exploit biosynthetic and biochemical properties that may lead to drug improvement. These 454 ESTs will provide the foundation for further functional genomic research into the traditional herb P. ginseng or its closely related species.
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294
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Sun C, Jin ZD, Pan X, Wang D, Li ZS. Endoscopic ultrasound-guided transgastric pancreatic duct drainage after Whipple surgery in a patient with chronic pancreatitis. Endoscopy 2011; 43 Suppl 2 UCTN:E182-3. [PMID: 21557158 DOI: 10.1055/s-0030-1256319] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
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295
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Liu Z, Sun C, Zhang Y, Ji Z, Yang G. Phosphatidylinositol 3-Kinase-C2β Inhibits Cisplatin-Mediated Apoptosis via the Akt Pathway in Oesophageal Squamous Cell Carcinoma. J Int Med Res 2011; 39:1319-32. [PMID: 21986133 DOI: 10.1177/147323001103900419] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A major problem in treating oesophageal squamous cell carcinoma (ESCC) with cisplatin is the development of drug resistance. In order to determine whether phosphatidylinositol 3-kinase (PI3K)-C2β (encoded by the PIK3C2B gene) reduced the sensitivity of ESCC to cisplatin, transfected Eca109 cells that overexpressed PIK3C2B were produced. Additionally, PI3K-C2β-siRNA was used to silence endogenous PI3K-C2β in EC9706 cisplatin-resistant cells. The relationship between PIK3C2B expression and clinicopathological characteristics was also investigated in samples from 61 patients. The overexpression of PIK3C2B in Eca109 cells significantly inhibited cisplatin-induced apoptosis and cleavage of caspase-3. Knockdown of PI3K-C2β enhanced cisplatin-induced apoptosis in EC9706 cells. PIK3C2B expression was associated with an increased level of phosphorylated Akt. Based on the tumour samples, expression of PIK3C2B was associated with tumour metastasis and in vitro assay suggested that it mediated cell migration. These results indicated that PI3K-C2β, via the Akt signalling pathway, might play a key role in cisplatin resistance and that targeting this pathway might be useful in treating cisplatin-resistant tumours.
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296
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Carpenter CM, Pratx G, Sun C, Liu H, Xing L. WE-G-211-06: Multiplexed Radio Luminescence Imaging for Radiation Therapy. Med Phys 2011. [DOI: 10.1118/1.3613445] [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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297
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Pratx G, Carpenter C, Sun C, Xing L. WE-G-211-05: Advances in X-Ray Luminescence Computed Tomography: Towards In-Vivo Imaging of Radioluminescent Nanophosphors. Med Phys 2011. [DOI: 10.1118/1.3613444] [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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298
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Kuang Y, Pratx G, Sun C, Carpenter C, Xing L. TU-A-301-08: X-Ray Stimulated Fluorescence for Breast Imaging. Med Phys 2011. [DOI: 10.1118/1.3613098] [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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299
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Carpenter CM, Pratx G, Sun C, Xing L. Limited-angle x-ray luminescence tomography: methodology and feasibility study. Phys Med Biol 2011; 56:3487-502. [PMID: 21606553 DOI: 10.1088/0031-9155/56/12/003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
X-ray luminescence tomography (XLT) has recently been proposed as a new imaging modality for biological imaging applications. This modality utilizes phosphor nanoparticles which luminesce near-infrared light when excited by x-ray photons. The advantages of this modality are that it uniquely combines the high sensitivity of radioluminescent nanoparticles and the high spatial localization of collimated x-ray beams. Currently, XLT has been demonstrated using x-ray spatial encoding to resolve the imaging volume. However, there are applications where the x-ray excitation may be limited by geometry, where increased temporal resolution is desired, or where a lower dose is mandatory. This paper extends the utility of XLT to meet these requirements by incorporating a photon propagation model into the reconstruction algorithm in an x-ray limited-angle (LA) geometry. This enables such applications as image-guided surgery, where the ability to resolve lesions at depths of several centimeters can be the key to successful resection. The hybrid x-ray/diffuse optical model is first formulated and then demonstrated in a breast-sized phantom, simulating a breast lumpectomy geometry. Both numerical and experimental phantoms are tested, with lesion-simulating objects of various sizes and depths. Results show localization accuracy with median error of 2.2 mm, or 4% of object depth, for small 2-14 mm diameter lesions positioned from 1 to 4.5 cm in depth. This compares favorably with fluorescence optical imaging, which is not able to resolve such small objects at this depth. The recovered lesion size has lower size bias in the x-ray excitation direction than the optical direction, which is expected due to the increased optical scatter. However, the technique is shown to be quite invariant in recovered size with respect to depth, as the standard deviation is less than 2.5 mm. Sensitivity is a function of dose; radiological doses are found to provide sufficient recovery for µg ml(-1) concentrations, while therapy dosages provide recovery for ng ml(-1) concentrations. Experimental phantom results agree closely with the numerical results, with positional errors recovered within 8.6% of the effective depth for a 5 mm object, and within 5.2% of the depth for a 10 mm object. Object-size median error is within 2.3% and 2% for the 5 and 10 mm objects, respectively. For shallow-to-medium depth applications where optical and radio-emission imaging modalities are not ideal, such as in intra-operative procedures, LAXLT may be a useful tool to detect molecular signatures of disease.
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Armenian S, Sun C, Shannon T, Shangguan M, MIlls G, Francisco L, Wong FL, Forman SJ, Bhatia S. Incidence and predictors of delayed congestive heart failure (CHF) after hematologic malignancies treated with autologous hematopoietic cell transplantation (aHCT). J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.9042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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