51
|
Sun T, Hu L, Jiang M, Ning H, Zhang B, Ren J, Li Y, Li B, Chen J, Yang F, Xu C, Wang J, Lou X, Hu J, Chen H. [Therapeutic effect of CY-fTBI and BMM conditioning regimen in the process of allo-HSCT treating Ⅲ,Ⅳ non-Hodgkin lymphoma: 15 years analysis of single-center]. ZHONGHUA XUE YE XUE ZA ZHI = ZHONGHUA XUEYEXUE ZAZHI 2015; 36:830-4. [PMID: 26477760 PMCID: PMC7364953 DOI: 10.3760/cma.j.issn.0253-2727.2015.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
目的 比较预处理方案Cy-fTBI(环磷酰胺+分次全身照射)与BMM(白消安+马法兰+米托蒽醌)在异基因造血干细胞移植(allo-HSCT)治疗Ⅲ、Ⅳ期非霍奇金淋巴瘤(NHL)疗效上的差异。 方法 对1998年11月至2014年5月接受allo-HSCT治疗的47例Ⅲ、Ⅳ期NHL病例进行回顾性分析,观察比较Cy-fTBI和BMM预处理方案两组患者移植后造血重建时间、急性移植物抗宿主病(aGVHD)和慢性移植物抗宿主病(cGVHD)累积发生率、移植相关死亡率(TRM)、复发率(RR)、无病生存率(DFS)和总体生存率(OS)。 结果 移植后中性粒细胞≥0.5×109/L和血小板计数≥50×109/L的中位时间为17(10~72) d和27(5~98) d; aGVHD发生率为53.19%,Ⅰ~Ⅱ度占42.55%,Ⅲ~Ⅳ度占10.64%;cGVHD发生率为21.28%;中位随访9.7(0.2~149.1)个月,47例患者中21例生存。Cy-fTBI组1、3、5年OS率分别为73.5%、49.3%、40.1%,DFS率分别为71.4%、45.6%、39.3%。BMM组1、3、5年OS率分别为67.8%、32.9%、31.4%,DFS率分别为65.3%、31.1%、30.2%。Cy-fTBI组1、3、5年RR率分别为18.9%、19.5%、35.2%,TRM率分别为23.0%、38.3%、39.2%。BMM组1、3、5年RR分别为27.4%、38.9%、39.2%,TRM率分别为24.5%、46.4%、48.2%,两组在OS、DFS、RR、TRM等指标上差异无统计学意义。 结论 Allo-HSCT是治疗Ⅲ、Ⅳ期NHL的有效手段,但TRM仍相对较高。Cy-fTBI预处理方案与BMM方案相比,减少了TRM、RR,增加了DFS和OS,但差异无统计学意义。
Collapse
|
52
|
Li Y, Jiang M, Xu C, Chen J, Li B, Wang J, Hu J, Ning H, Chen H, Chen S, Hu L. Granulocyte colony-stimulating factor-primed bone marrow: an excellent stem-cell source for transplantation in acute myelocytic leukemia and chronic myelocytic leukemia. Chin Med J (Engl) 2015; 128:20-4. [PMID: 25563308 PMCID: PMC4837814 DOI: 10.4103/0366-6999.147790] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Background: Steady-state bone marrow (SS-BM) and granulocyte colony-stimulating growth factor-primed BM/peripheral blood stem-cell (G-BM/G-PBSC) are the main stem-cell sources used in allogeneic hematopoietic stem-cell transplantation. Here, we evaluated the treatment effects of SS-BM and G-BM/G-PBSC in human leucocyte antigen (HLA)-identical sibling transplantation. Methods: A total of 226 patients (acute myelogenous leukemia-complete remission 1, chronic myelogenous leukemia-chronic phase 1) received SS-BM, G-BM, or G-PBSC from an HLA-identical sibling. Clinical outcomes (graft-versus-host disease [GVHD], overall survival, transplant-related mortality [TRM], and leukemia-free survival [LFS]) were analyzed. Results: When compared to SS-BM, G-BM gave faster recovery time to neutrophil or platelet (P < 0.05). Incidence of grade III-IV acute GVHD and extensive chronic GVHD (cGVHD) was lower than seen with SS-BM (P < 0.05) and similar to G-PBSC. Although the incidence of cGVHD in the G-BM group was similar to SS-BM, both were lower than G-PBSC (P < 0.05). G-BM and G-PBSC exhibited similar survival, LFS, and TRM, but were significantly different from SS-BM (P < 0.05). There were no significant differences in leukemia relapse rates among the groups (P > 0.05). Conclusions: G-CSF-primed bone marrow shared the advantages of G-PBSC and SS-BM. We conclude that G-BM is an excellent stem-cell source that may be preferable to G-PBSC or SS-BM in patients receiving HLA-identical sibling hematopoietic stem-cell transplantation.
Collapse
|
53
|
Li X, Liu W, Wang H, Yang L, Li Y, Wen H, Ning H, Wang J, Zhang L, Li J, Fan D. Rap1 is indispensable for TRF2 function in etoposide-induced DNA damage response in gastric cancer cell line. Oncogenesis 2015; 4:e144. [PMID: 25821946 PMCID: PMC4491608 DOI: 10.1038/oncsis.2015.1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 01/19/2015] [Accepted: 01/21/2015] [Indexed: 12/14/2022] Open
Abstract
The telomeric protein TRF2, involving in telomeric and extratelomeric DNA damage response, has been previously reported to facilitate multidrug resistance (MDR) in gastric cancer cells by interfering ATM-dependent DNA damage response induced by anticancer drugs. Rap1 is the TRF2-interacting protein in the shelterin complex. Complex formation between Rap1 and TRF2 is essential for their function in telomere and end protection. Here we focus on the effects of Rap1 on TRF2 function in DNA damage response induced by anticancer drugs. Both Rap1 and TRF2 expression were upregulated in SGC7901 and its MDR variant SGC7901/VCR after etoposide treatment, which was more marked in SGC7901/VCR than in SGC7901. Rap1 silencing by siRNA in SGC7901/VCR partially reversed the etoposide resistance. And Rap1 silencing partially reversed the TRF2-mediated resistance to etoposide in SGC7901. Rap1 silencing did not affect the TRF2 upregulation induced by etoposide, but eliminated the inhibition effect of TRF2 on ATM expression and ATM phosphorylation at serine 1981 (ATM pS1981). Furthermore, phosphorylation of ATM targets, including γH2AX and serine 15 (S15) on p53, were increased in Rap1 silencing cells in response to etoposide. Thus, we confirm that Rap1, interacting with TRF2 in the shelterin complex, also has an important role in TRF2-mediated DNA damage response in gastric cancer cells treated by etoposide.
Collapse
|
54
|
Xu M, Zhang B, Liu Y, Zhang J, Sheng H, Shi R, Liao L, Liu N, Hu J, Wang J, Ning H, Liu T, Zhang Y, Chen H. The immunologic and hematopoietic profiles of mesenchymal stem cells derived from different sections of human umbilical cord. Acta Biochim Biophys Sin (Shanghai) 2014; 46:1056-65. [PMID: 25377438 DOI: 10.1093/abbs/gmu100] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Mesenchymal stem cells (MSCs) have been widely used in allogeneic stem cell transplantation. We compared immunologic and hematopoietic characteristics of MSCs derived from whole human umbilical cord (UC), as well as from different sections of UCs, including the amniotic membrane (AM), Wharton's jelly (WJ), and umbilical vessel (UV). Cell phenotypes were examined by flow cytometry. Lymphocyte transformation test and mixed lymphocyte reaction were performed to evaluate the immuno-modulatory activity of MSCs derived from UCs. The mRNA expression of cytokines was detected by real-time polymerase chain reaction. Hematopoietic function was studied by co-culturing MSCs with CD34(+) cells isolated from cord blood. Our results showed that MSCs separated from these four different sections including UC, WJ, UV, and AM had similar biological characteristics. All of the MSCs had multi-lineage differentiation ability and were able to differentiate into osteoblasts, adipocytes, and chondrocytes. The MSCs also inhibited the proliferation of allogeneic T cells in a dose-dependent manner. The relative mRNA expression of cytokines was examined, and the results showed that UCMSCs had higher interleukin-6 (IL6), IL11, stem cell factor, and FLT3 expression than MSCs derived from specific sections of UCs. CD34(+) cells had high propagation efficiencies when co-cultured with MSCs derived from different sections of UCs, among which UCMSCs are the most efficient feeding layer. Our study demonstrated that MSCs could be isolated from whole UC or specific sections of UC with similar immunomodulation and hematopoiesis supporting characteristics.
Collapse
|
55
|
Lu J, Yang J, Xing Z, Ning H. Study on structures and electronic properties of neutral and anionic TiSin(0,-1)(n = 1–8) clusters using G4 theory. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2014. [DOI: 10.1142/s0219633614500382] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The geometries, electronic structures and energies of small TiSi n species (n = 1–8) and their anions were systematically investigated by G4 theory. The ground-state structures of these clusters are presented herein. For neutral TiSi n (n = 1–8), the spin multiplicities of the ground-state structures are singlet, with the exception of n = 2, which exists in a triplet state. For anionic TiSi n-, the spin multiplicities of the ground-state structures are doublet, with the exception of n = 2, which is quartet. The adiabatic electron affinities for TiSi n are estimated to be 1.31 eV ( TiSi ), 1.46 eV ( TiSi 2), 1.53 eV ( TiSi 3), 1.71 eV ( TiSi 4), 2.06 eV ( TiSi 5), 2.16 eV ( TiSi 6), 2.20 eV ( TiSi 7) and 2.39 eV ( TiSi 8). In comparison with the available experimental data, the calculated adiabatic electron affinities differ from experimental values by an average absolute deviation of only 0.03 eV. Additionally, the dissociation energies of Ti atoms from TiSi n, and Si atoms from TiSi n and Si n clusters are estimated to examine relative stabilities.
Collapse
|
56
|
Lu J, Yang J, Kang Y, Ning H. Probing the electronic structures and properties of neutral and anionic ScSi n (0,−1) (n = 1–6) clusters using ccCA-TM and G4 theory. J Mol Model 2014; 20:2114. [DOI: 10.1007/s00894-014-2114-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Accepted: 12/12/2013] [Indexed: 12/01/2022]
|
57
|
Zhuge Y, Ning H, Cheng J, Arora B, Xie H, Miller R. SU-E-I-51: Metal Artifact Reduction in CT Using Deformable Tissue-Class Modeling. Med Phys 2013. [DOI: 10.1118/1.4814161] [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
|
58
|
Yu Z, Hu L, Jiang M, Ning H, Xu C, Li B, Li Y, Lou X, Wang J, Hu J, Chen H. Dermatic Scedosporium apiospermum infection after autologous bone marrow transplantation. Intern Med 2013; 52:689-93. [PMID: 23503412 DOI: 10.2169/internalmedicine.52.8532] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Infection with Scedosporium apiospermum (S. apiospermum) is rare, although it is associated with a high fatality rate, especially in immunosuppressed patients. A 23-year-old man with acute myelogenous leukemia (AML) (M2) who was pretreated with chemotherapy for autologous bone marrow transplantation developed a skin ulcer on the left groin. After a culture study demonstrated the presence of S. apiospermum, voriconazole was administered and the lesion rapidly improved. Since a diagnosis of S. apiospermum continues to depend on the results of a fungal culture and most isolates of S. apiospermum are resistant to amphotericin B, voriconazole should be considered as the first choice when "mold" is thought to be the causative organism.
Collapse
|
59
|
Ning H, Lin G, Lue TF, Lin CS. A coculture system of cavernous endothelial and smooth muscle cells. Int J Impot Res 2012; 25:63-8. [DOI: 10.1038/ijir.2012.36] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
60
|
Bai X, Zhang Q, Yang J, Ning H. Probing the Electronic Structures and Properties of Neutral and Charged Monomethylated Arsenic Species (CH3Asn(−1,0,+1), n = 1–7) Using Gaussian-3 Theory. J Phys Chem A 2012; 116:9382-90. [DOI: 10.1021/jp3056569] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
61
|
Behera MK, Sharma A, Dutta S, Sharma S, Julka PK, Rath GK, Kil WJ, Ko C, Kaushal A, Warran K, Ning H, Camphausen K, Smart D, Vern-Gross TZ, McMullen KP, Case LD, Bourland JD, Ellis TL, Lawrence JA, Tatter SB, Shaw EG, Urbanic JJ, Chan MD, Jensen RL, Shrieve DC, Mohindra P, Robins HI, Tome WA, Howard SP, Chen C, Damek D, Gaspar LE, Ney D, Waziri A, Lillehei K, Kavanagh BD, Wang CC, Floyd S, Chang CH, Warnke P, Chio CC, Kasper E, Mahadevan A, Wong E, Jeyapalan S, Chen C, Mahajan A, Grosshans D, McAleer MF, Brown PD, Chintagumpala M, Vats T, Puduvalli V, Yock T, Schulder M, Herschmann Y, Ghaly M, Knisely J, Ghaly M, Kapur A, Schulder M, Knisely J, Goetz P, Lwu S, Ebinu J, Arayee M, Monsalves E, Laperriere N, Menard C, Bernstein M, Zadeh G, Loganathan AG, Chan MD, Alphonse N, Peiffer AM, Johnson A, McMullen KP, Urbanic JJ, Saconn PA, Bourland JD, Munley MT, Shaw EG, Tatter SB, Ellis TL, Lwu S, Goetz P, Aryaee M, Monsalves E, Laperriere N, Menard C, Bernstein M, Zadeh G, Mahajan A, Lowe C, McAleer MF, Grosshans D, DeGroot J, Mark G, Vats T, Brown PD, Ruda R, Trevisan E, Magliola U, Bertero L, Bosa C, Ricardi U, Soffietti R, Rajappa P, Margetis K, Wernicke AG, Sherr DL, Lavi E, Fine RL, Schwartz T, Pannullo SC, Laack N, Blanchard M, Buckner J, Glass J, Andrews DW, Werner-Wasik M, Evans J, Lawrence YR, Shi W, Strauss I, Corn BW, Matceyevsky D, Alani S, Gez E, Shtraus N, Kanner AA, Spasic M, Choy W, Nagasawa D, Yang I, Noel M, Woolf E, Smith R, Castillo-Rojas P, Sorenson S, Smith K, Scheck AC, Han SJ, Oh MC, Sughrue ME, Rutkowski MJ, Aranda D, Barani IJ, Parsa AT, Redmond KJ, Horska A, Ishaq O, Ford E, McNutt T, Batra S, Kleinberg L, Wharam M, Mahone M, Terezakis S, Ryu S, Rock J, Movsas B, Mikkelsen T, Rosenblum M, Sabsevitz D, Bovi JA, Leo P, LaViolette P, Rand S, Mueller W, Phillips A, Venkatramani R, Olch A, Grimm J, Davidson T, Brown R, Dhall G, Finlay J, Wong K. RADIATION THERAPY. Neuro Oncol 2011. [DOI: 10.1093/neuonc/nor160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
62
|
Ko C, Ménard C, Ning H, Lita E, Smith S, Pinto P, Singh A, Coleman C, Camphausen K, Kaushal A. Intrarectal Amifostine Suspension During External Beam Radiotherapy For Prostate Cancer May Protect Against Long-term Toxicity. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
|
63
|
Zhuge Y, Xie H, Ning H, Cheng J, Arora B, Han-Oh Y, Miller R. SU-E-J-59: GPU-Based Interactive Multi-Volume Visualization in Radiotherapy Treatment Planning. Med Phys 2011. [DOI: 10.1118/1.3611827] [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
|
64
|
Ning H, Chin B, Cheng J, Zhuge Y, Xie H, Ondo J, Kaushal A, Miller R. SU-E-T-526: Is the Marker Matching Method Adequate for Daily Setup of Pelvic Fields in Prostate Irradiation? Med Phys 2011. [DOI: 10.1118/1.3612479] [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
|
65
|
Ning H, Chin B, Cheng J, Miller R. SU-E-T-806: IMRT Technique for CSI: Better Dose Distribution, Simplified Setup, No Need to Shift Junctions. Med Phys 2011. [DOI: 10.1118/1.3612770] [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
|
66
|
Han-Oh S, Cheng J, Ning H, Arora B, Zhuge Y, Xie H, Ondos J, Miller R. SU-E-T-90: Determination of Orthovoltage Beam-Hardening Filters Generating the NIST-Traceable Beam Quality. Med Phys 2011. [DOI: 10.1118/1.3612041] [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
|
67
|
Ko C, Ning H, Camphausen K, Smith S, McNally D, Choyke P, Lita E, Coleman N, Menard C, Kaushal A. Phase II Trial of Combined High-dose-Rate Brachytherapy and External Beam Radiotherapy for Adenocarcinoma of the Prostate: Long-term Follow-up of Trial NCI 02-C-0207. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.815] [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]
|
68
|
Dong C, Yang J, Ning H, Li C. Studies on structures, energetics, and electron affinities of As–nucleobases and their anions with density functional theory. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.theochem.2010.03.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
69
|
Fan H, Yang J, Lu W, Ning H, Zhang Q. Structures and Electronic Properties of Beryllium Atom Encapsulated in Sin(0,−1) (n = 2−10) Clusters. J Phys Chem A 2009; 114:1218-23. [DOI: 10.1021/jp910326a] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
70
|
Li G, Xie H, Miller D, Zhuge Y, Klein E, Low D, Ning H, Citrin D, Camphausen K, Miller R. Investigation of using Optical Surface Imaging for Volumetric Prediction of Respiratory Organ Motion. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
71
|
Housri N, Ondos J, Choyke P, Barbara A, Ning H, Citrin D, Singh A, Kaushal A. Tumor Nodule Location Predicts the Feasibility of Intraprostatic High-dose Irradiation in Men with Localized Prostate Cancer. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
72
|
Yang R, Lin G, Ning H, Guo H, Dai Y, Sun Z, Lin C, Lue T. UP-3.101: Notable Promotion of Neurite Out Growth in Major Pelvic Ganglion through Cytokine Secretion by Adipose Stem Cells. Urology 2009. [DOI: 10.1016/j.urology.2009.07.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
73
|
Li G, Ning H, Xie H, Guion P, Citrin D, Zach L, Simone N, Kaushal A, Camphausen K, Miller R. SU-FF-J-113: A Simplified 4DRT Strategy Using a 3.5D Approach and 3D Planning Tools: A Dual Motion Phantom Study. Med Phys 2009. [DOI: 10.1118/1.3181405] [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
|
74
|
Li G, Xie H, Ning H, Low D, Citrin D, Zach L, Simone N, Kaushal A, Camphausen K, Miller R. SU-FF-J-125: A Simplified 4DRT Strategy Using a 3.5D Approach and 3D Planning Tools: A Planning Comparison Study. Med Phys 2009. [DOI: 10.1118/1.3181417] [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
|
75
|
Ning H, Yang F, Jiang M, Hu L, Feng K, Zhang J, Yu Z, Li B, Xu C, Li Y, Wang J, Hu J, Lou X, Chen H. Reply to “Reply to ‘The correlation between cotransplantation of mesenchymal stem cells and higher recurrence rates in hematologic malignancy patients: outcome of a pilot clinical study’ by Ning H et al.” by Behre et al. Leukemia 2009. [DOI: 10.1038/leu.2008.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
76
|
Li G, Ning H, Brown A, Citrin D, Xie H, Chang J, Arora B, Capala J, Camphausen K, Miller R. Image Guided, Motion-free Patient Body Setup using 3D Volumetric Image Registration of Classified Stable Bony Landmarks. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.072] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
77
|
Zhao L, Li T, Wang Y, Pan Y, Ning H, Hui X, Xie H, Wang J, Han Y, Liu Z, Fan D. Elevated plasma osteopontin level is predictive of cirrhosis in patients with hepatitis B infection. Int J Clin Pract 2008; 62:1056-62. [PMID: 17537188 DOI: 10.1111/j.1742-1241.2007.01368.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Osteopontin (OPN) was shown to play an important role in the pathogenesis of various inflammatory and fibrotic processes and elevated in fibrotic liver of mouse model. However, the significance of OPN in hepatitis B virus (HBV)-induced liver cirrhosis (LC) remains unclear and is therefore evaluated in this study. METHODS Thirty-nine patients with HBV-induced LC, 30 patients with HBV infection but without cirrhosis, 11 patients with HBV-related hepatocellular carcinoma (HCC) and 14 additional healthy controls were enrolled in this study. Plasma levels of OPN were measured with enzyme-linked immunosorbent assay and the relationship between OPN and clinical parameters was evaluated. RESULTS When compared to HBV infection group (median 2.16 ng/ml), plasma levels of OPN were significantly increased in cirrhosis (4.52 ng/ml, p < 0.001) and cancer group (13.38 ng/ml, p < 0.001). The OPN level was correlated with the severity of liver damage according to Child-Pugh classification (p = 0.003). It showed at least comparable sensitivity and specificity to predict cirrhosis as aspartate aminotransferase to platelet ratio index, a previously established non-invasive serum marker of cirrhosis. CONCLUSIONS These data suggest that OPN could be used to evaluate the existence of LC, as OPN has previously been reported to be increased in the HCC; this unique feature makes OPN a promising candidate for prediction biomarker in the long-time surveillance of patients with HBV infection to evaluate the risk of cirrhosis and cancer.
Collapse
|
78
|
Su J, Lei Z, Zhang W, Ning H, Ping J. Distribution of orexin B and its relationship with GnRH in the pig hypothalamus. Res Vet Sci 2008; 85:315-23. [PMID: 18255106 DOI: 10.1016/j.rvsc.2007.12.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2007] [Revised: 11/28/2007] [Accepted: 12/11/2007] [Indexed: 11/30/2022]
Abstract
Increasing evidence suggests that orexins--hypothalamic neuropeptides--act as neurotransmitters or neuromediators in the brain, regulating autonomic and neuroendocrine functions. Orexins are closely associated with gonadotropin-releasing hormone (GnRH) neurons in the preoptic area and alter luteinizing hormone (LH) release, suggesting that they regulate reproduction. Here, we investigated the distribution of orexin B (immunohistochemical technique) and the relationship between orexin B and GnRH containing fibres and neurons in the pig hypothalamus using double immunofluorescence and laser-scanning confocal microscopy. Orexin B immunoreactive neurons were mainly localized in the perifornical area (PeF), dorsomedial hypothalamic nucleus (DMH), zona incerta (ZI) and the posterior hypothalamic area (PH), with a sparser distribution in the preoptic and anterior hypothalamic area. Immunoreactive fibres were distributed throughout the central nervous system. Approximately 30% GnRH neurons were in close contact with orexin B immunoreactive fibres, among these approximately 6% of GnRH neurons co-localized with orexin B perikarya in the region between the caudal preoptic area and the anterior hypothalamic area. Orexin B may regulate reproduction by altering LH release in the hypothalamus.
Collapse
|
79
|
Ning H, Yang F, Jiang M, Hu L, Feng K, Zhang J, Yu Z, Li B, Xu C, Li Y, Wang J, Hu J, Lou X, Chen H. The correlation between cotransplantation of mesenchymal stem cells and higher recurrence rate in hematologic malignancy patients: outcome of a pilot clinical study. Leukemia 2008; 22:593-9. [PMID: 18185520 DOI: 10.1038/sj.leu.2405090] [Citation(s) in RCA: 259] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In this open-label randomized clinical trial, HLA-identical sibling-matched hematopoietic stem cells (HSC) were transplanted (non-MSCs group, n=15) or cotransplanted with mesenchymal stem cells (MSCs) (MSCs group, n=10) in hematologic malignancy patients. The median number of MSCs infused was 3.4 x 10(5) kg(-1) (range, 0.3-15.3 x 10(5) kg(-1)). MSCs infusions were well tolerated. The median time to neutrophil engraftment (absolute neutrophil count >0.5 x 10(9) l(-1)) was 16 days for MSCs group and 15 days for non-MSCs group. The median time to platelet engraftment (platelet count >50 x 10(9) l(-1)) was 30 and 27 days, respectively. Grades II-IV acute graft-versus-host disease (GVHD) was observed respectively, in one (11.1%) and eight (53.3%) evaluable patients. Chronic GVHD was found in one (14.3%) and four (28.6%) evaluable patients. The number of patients who relapsed were six (60.0%) and three (20.0%), and the 3-year disease-free survivals were 30.0 and 66.7%, respectively. Thus cotransplantation of MSCs and HSCs may prevent GVHD, but the relapse rate is obviously higher than the control group. We conclude that use of MSCs must be handled with extreme caution before a large-scale clinical trial is performed.
Collapse
|
80
|
Li G, Guion P, Ning H, Citrin D, Xie H, Capala J, Arora B, Camphausen K, Singh A, Miller R. A Pancreas Motion Study Using Automatic Image Segmentation of Time-Resolved, Single-Slice MR Images. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.2289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
81
|
Miller R, Ning H, Justus B, Huston A, Li G, Chang J, Capala J, Xie H, Citrin D, Camphausen K. Use of an Optical Fiber Dosimeter to Measure Small Field Output Factors in Stereotactic Radiosurgery. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.1990] [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]
|
82
|
Soule BP, Simone NL, Savani BN, Ning H, Albert PS, Barrett AJ, Singh AK. Pulmonary function following total body irradiation (with or without lung shielding) and allogeneic peripheral blood stem cell transplant. Bone Marrow Transplant 2007; 40:573-8. [PMID: 17637691 DOI: 10.1038/sj.bmt.1705771] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Our purpose was to determine if total body irradiation (TBI) with lung dose reduction protects against subsequent radiation-induced deterioration in pulmonary function. Between July 1997 and August 2004, 181 consecutive patients with hematologic malignancies received fractionated TBI before allogeneic peripheral blood stem cell transplant. The first 89 patients were treated to a total dose of 13.6 Gy. Thereafter, total body dose was decreased to 12 Gy with lung dose reduction to 9 or 6 Gy. All patients underwent pulmonary function test evaluation before treatment, 90 days post-treatment, then annually. Median follow-up was 24.0 months. Eighty-nine patients were treated with lung shielding, and 92 without. At 1-year post transplant, there was a small but significant difference in lung volume measurements between patients with lung shielding and those without. This was not observed at the 2-year time point. When stratified by good (>100% predicted) or poor (</=100% predicted) baseline lung function, patients with poor function demonstrated protection at 1 year with lung shielding, while those with good initial lung function did not. TBI with or without lung dose reduction has a small but statistically significant effect on pulmonary function measured at 1 year but not 2 years post irradiation.
Collapse
|
83
|
Ushino T, Justus B, Huston A, Ning H, Miller R, Al-Ghazi M. SU-FF-T-369: Real-Time Optical Fiber in Vivo Dosimeter with a Novel Method for Eliminating the “stem Effect”. Med Phys 2007. [DOI: 10.1118/1.2761094] [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
|
84
|
Li G, Xie H, Ning H, Citrin D, Capala J, Guion P, Arora B, Camphausen K, Coleman N, Miller R. 2775. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.1192] [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]
|
85
|
Mansueti JR, Singh AK, Karimpour SE, Guion P, Ning H, Savani B, Wu C, Altemus R, Barrett J. Pretreatment pulmonary function tests predict risk of mortality following fractionated total body irradiation without lung dose reduction prior to stem cell transplant. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.6550] [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
6550 Background: Peripheral blood stem cell transplantation (PBSCT) is a key component in the treatment of various malignancies. Preparatory regimens for PBSCT often include total body irradiation (TBI). Pulmonary toxicity is often prominent, and is felt to be related to total lung dose and dose rate. The Radiation Oncology Branch of the National Institute of Health initially administered TBI without lung shielding, however shielding was added in 2002. Pulmonary function testing (PFT) was undertaken both before and after stem cell transplant and TBI for all patients. The PFT results were analysed to test the hypothesis that TBI patients with pre-treatment combined ventilation/diffusion capacity deficits, defined as both FEV1 and DLCO below 100% predicted, would benefit most from reduction of lung dose. Methods: From 1997–2004, 146 consecutive patients with hematologic malignancies received fractionated TBI before PBSCT. The first 85 patients were treated without lung dose reduction to 13.6 Gray (Gy). Thereafter, total body dose was decreased to 12 Gy (1.5 Gy BID for 4 days). Initially, lung dose was limited to 9 Gy by use of lung shielding. Later lung dose was reduced to 6 Gy. All patients received PFTs prior to treatment, 90 days after treatment, and annually. Results: Median F/U was 44 months (range 12–90 months). Sixty-one patients had combined ventilation/diffusion capacity deficits defined as both a forced expiratory volume in the first second (FEV1) and a diffusion capacity of carbon dioxide (DLCO) less than 100% predicted. Of these 61, 27 had lung dose reduction and 34 did not. One-year survival was 71% versus 50% with and without lung dose reduction respectively (log rank test p=0.042). Eighty-five patients had FEV1 and/or DLCO greater than or equal to 100% predicted; 34 were treated with lung dose reduction and 51 without. In both groups, 1 year survival was 70%. Conclusions: Among patients treated without lung dose reduction, survival was significantly worse among those with pretreatment combined ventilation/diffusion capacity deficits. Among those with combined ventilation/diffusion capacity deficits, lung dose reduction significantly improved survival. No significant financial relationships to disclose.
Collapse
|
86
|
Ning H, Chin B, Karimpour S, Li G, Xie H, Miller R. SU-FF-T-42: A Pesudo-IMRT Method for Improving the Dose Uniformity in the Spine in Cranial-Spinal Irradaition. Med Phys 2006. [DOI: 10.1118/1.2240943] [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
|
87
|
Li G, Xie H, Ning H, Citrin D, Capala J, Arora B, Coleman C, Camphausen K, Miller R. SU-FF-J-74: High Accuracy of Volumetric Image Registration of CT, MR and PET Images. Med Phys 2006. [DOI: 10.1118/1.2240851] [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
|
88
|
Pai Panandiker A, Ning H, Miller R, Arora B, Karimpour S. A New Technique and Verification for Pediatric Cranial-Spinal Irradiation in Supine Position. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
89
|
Mansueti J, Singh A, Guion P, Ning H, Savani B, Barrett J, Karimpour S. Pre-Stem Cell Transplant Pulmonary Function Tests (PFTs) Predict Risk of Mortality in the Absence of Pulmonary Lung Shielding with Fractionated Total Body Irradiation (TBI). Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
90
|
Li T, Zhang Y, Fu L, Yu C, Li X, Li Y, Zhang X, Rong Z, Wang Y, Ning H, Liang R, Chen W, Babiuk LA, Chang Z. siRNA targeting the leader sequence of SARS-CoV inhibits virus replication. Gene Ther 2005; 12:751-61. [PMID: 15772689 PMCID: PMC7091583 DOI: 10.1038/sj.gt.3302479] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
SARS-CoV (the SARS-Associated Coronavirus) was reported as a novel virus member in the coronavirus family, which was the cause of severe acute respiratory syndrome. Coronavirus replication occurs through a unique mechanism employing Leader sequence in the transcripts when initiating transcription from the genome. Therefore, we cloned the Leader sequence from SARS-CoV(BJ01), which is identical to that identified from SARS-CoV(HKU-39849), and constructed specific siRNA targeting the Leader sequence. Using EGFP and RFP reporter genes fused with the cloned SARS-CoV Leader sequence, we demonstrated that the siRNA targeting the Leader sequence decreased the mRNA abundance and protein expression levels of the reporter genes in 293T cells. By stably expressing the siRNA in Vero E6 cells, we provided data that the siRNA could effectively and specifically decrease the mRNA abundance of SARS-CoV genes as analyzed by RT-PCR and Northern blot. Our data indicated that the siRNA targeting the Leader sequence inhibited the replication of SARS-CoV in Vero E6 cells by silencing gene expression. We further demonstrated, via transient transfection experiments, that the siRNA targeting the Leader sequence had a much stronger inhibitory effect on SARS-CoV replication than the siRNAs targeting the Spike gene or the antisense oligodeoxynucleotides did. This report provides evidence that targeting Leader sequence using siRNA could be a powerful tool in inhibiting SARS-CoV replication.
Collapse
|
91
|
Ning H, Ullman K, Miller R, Ayele A, Jocelyn L, Havelos J, Guion P, Xie H, Li G, Arora B, Coleman C, Menard C. A simple and reproducible method for daily verification and correction of isocenter position relative to prostatic fiducial markers using electronic portal imaging. Int J Radiat Oncol Biol Phys 2004. [DOI: 10.1016/j.ijrobp.2004.07.622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
92
|
Li G, Xie H, Ning H, Menard C, Coleman C, Miller R. Application of three-dimensional voxel fusion technique to multi-modality fusion of anatomical and functional images. Int J Radiat Oncol Biol Phys 2004. [DOI: 10.1016/j.ijrobp.2004.07.574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
93
|
Menard C, Citrin D, Susil R, Ahmed Gharib P, Gustafson G, Ning H, Miller R, Ullman K, Guion P, Pouliot J, Coleman C, Camphausen K. 1.5T MRI for cathether placement and treatment planning in high dose rate brachytherapy for prostate cancer. Int J Radiat Oncol Biol Phys 2004. [DOI: 10.1016/j.ijrobp.2004.07.372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
94
|
Huston AL, Justus BL, Falkenstein PL, Miller RW, Ning H, Altemus R. Optically stimulated luminescent glass optical fibre dosemeter. RADIATION PROTECTION DOSIMETRY 2002; 101:23-26. [PMID: 12382700 DOI: 10.1093/oxfordjournals.rpd.a005974] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
An optical fibre radiation dosemeter has been developed that utilises optically stimulated luminescence and scintillation to provide independent, remote, real-time dose measurements. The radiation sensitive element consists of a 1 mm long, 0.4 mm diameter piece of copper-ion-doped fused quartz that is attached to a 1 m length of commercial optical fibre. The dosemeter probe is 0.6 mm in diameter and is flexible enough to be used in standard medical catheters for internal radiation dose measurements. A four-channel dosemeter system has been built and characterised under conditions typical of a radiotherapy environment. The device exhibits a linear response over the range of doses from 0.01 Gy to 10 Gy. The dosemeter responds identically to both electrons and photons in the range from 4 to 20 MV and the calibration was retained to within +/-2% over a period of 4 weeks. The fibre dosemeter has been used successfully to verity doses received by three patients receiving radiotherapy treatments.
Collapse
|
95
|
Feng C, Liu L, Liu S, Ning H, Sun H, Guo A. Three-dimensional structure of CA1 pyramidal cells in rat hippocampus--optical recording of LSM and computer simulation of fractal structure. SCIENCE IN CHINA. SERIES B, CHEMISTRY, LIFE SCIENCES & EARTH SCIENCES 1995; 38:1187-94. [PMID: 8554671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The optical recording of three-dimensional (3-D) reconstruction of CA1 pyramidal cells was derived from the studies on the CA1 region of the hippocampus in adult male Wistar rats. The recording was produced by the Confocal Laser Scan Microscope (LSM-10). The attemption was to outline the morphological neural network of CA1 pyramidal cells organization, following the trail of axo-dendritic connections in 3-D spatial distributions among neurons. The fractal structure of neurons with their dendritic and axonal trees using fractal algorithm was noticed, and 2-18 simulated cells were obtained using PC-486 computer. The simulational cells are similar in morphology to the natural CA1 hippocampal pyramidal cells. Therefore, the exploitation of an advanced neurohistological research technique combining optical recording of the LSM-10 and computer simulation of fractal structure can provide the quantitative fractal structural basis for chaosic dynamics of brain.
Collapse
|
96
|
Kado NY, Wong JM, Kuzmicky PA, Woodrow JE, Ning H, Seiber JN, Hsieh DP. Quantitative integration of the Salmonella microsuspension assay with supercritical fluid extraction of model airborne vapor-phase mutagens. Mutat Res 1992; 271:253-60. [PMID: 1378198 DOI: 10.1016/0165-1161(92)90020-m] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Vapor-phase mutagens are potentially a major class of toxic contaminants in ambient and indoor air. These compounds are not routinely analyzed due to a lack of an established integrated methodology to quantitatively trap, extract and test the compounds in a bioassay. In a previous report, we emphasized the trapping of volatile and semi-volatile mutagens and the extraction of these compounds using supercritical carbon dioxide (CO2). In the present study, we discuss the use of a bioassay for the quantitation of the model mutagens, ethylene dibromide(EDB) and 4-nitrobiphenyl (4-NB), trapped from an airstream. The compounds EDB and 4-NB were released into a controlled airstream, trapped on XAD-4 adsorbent, and were extracted using supercritical CO2. The extract was tested in a microsuspension modification of the Ames Salmonella/microsome test adapted for volatile compounds. Linear dose-response relationships were obtained for supercritical CO2-extracted EDB using tester strain TA100 (+/- S9) and for 4-NB using tester strains TA98 and TA100 (-S9). Standard dose-response curves with known amounts of the compounds were also determined for comparison with measured amounts of the model compounds collected in an airstream. The gas chromatographic (GC)- and bioassay-determined quantities of EDB and 4-NB were highly correlated, accurate and precise. For example, bioassay-determined EDB concentrations were within 10% of the GC-determined concentrations. Our results demonstrate that the integrated methodology for vapor-phase mutagens developed in this study would be useful for quantitative analysis of these and related airborne vapor-phase mutagenic compounds.
Collapse
|
97
|
Ning H, Oreffo VI, Gumerlock PH, Witschi H. Increased c-Ki-ras expression in hamster lung exposed to N-nitrosodiethylamine and hyperoxia as detected by the polymerase chain reaction. Cancer Lett 1991; 59:75-80. [PMID: 1715235 DOI: 10.1016/0304-3835(91)90138-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Neuroendocrine lung cancers can be induced in hamsters within 8-12 weeks by combined exposure to N-nitrosodiethylamine (DEN) and hyperoxia. The expression of the c-Ki-ras gene in this lung cancer model was studied using polymerase chain reaction analysis of mRNA (RNA/PCR). We used four different groups of hamsters, exposed for 6 weeks to DEN with hyperoxia (60% oxygen), DEN, hyperoxia, or ambient air, respectively. Total RNA was isolated from lung tissues and cDNA made prior to PCR amplification. A 234-bp product was amplified from c-Ki-ras cDNA and quantitated using scanning laser densitometry. The data obtained were normalized to the expression of the house keeping gene B-actin. The c-Ki-ras products were present after amplification of all hamster lung RNA samples. The hamster lungs exposed to DEN with hyperoxia displayed higher c-Ki-ras protooncogene expression than hamsters exposed to DEN, hyperoxia, or ambient air alone. Since the animals studied were sacrificed at 6 weeks, prior to the appearance of tumors, we conclude that this increased expression may indicate a role for c-Ki-ras in the initial steps in malignant transformation of neuroendocrine cells.
Collapse
|