151
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Peng L, Schwarz RE. Pancreatic neuroendocrine tumors: signal pathways and targeted therapies. Curr Mol Med 2013; 13:333-339. [PMID: 23331005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 10/12/2012] [Accepted: 10/15/2012] [Indexed: 06/01/2023]
Abstract
Pancreatic neuroendocrine tumors (PNETs) are rare but are well understood to cover a broad spectrum of clinical presentation, tumor biology and prognosis. More than 60% of PNETs are diagnosed at advanced disease stage and are ineligible for surgical resection. Prior to 2011, streptozocin was the only approved agent for unresectable advanced PNETs. In recent years, breakthroughs in signal pathway research have led to the identification of new therapeutic targets and agents directed at the molecular level. In 2011, two new targeted therapeutic agents, sunitinib and everolimus, were approved by the Food and Drug Administration (FDA). Sunitinib is an inhibitor of multiple tyrosine kinases, and everolimus is an inhibitor of the mammalian target of rapamycin (mTOR) pathway. This review discusses the major signaling pathways that are frequently mutated or deregulated in PNETs, and the implications of molecular alterations for PNET therapy. Biologic therapy through targeting relevant pathways represents a promising approach in the therapy of advanced and unresectable PNETs.
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Affiliation(s)
- L Peng
- Department of Pathology, UT Southwestern Medical Center, 5909 Harry Hines Boulevard, Dallas, TX 75390-9234, USA.
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152
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Peng L, E. Schwarz R. Pancreatic Neuroendocrine Tumors: Signal Pathways and Targeted Therapies. Curr Mol Med 2013. [DOI: 10.2174/156652413805076777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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153
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Peng L, Zhang L, Cheng X, Fan LS, Hao HQ. Disruption of cellulose synthesis by 2,6-dichlorobenzonitrile affects the structure of the cytoskeleton and cell wall construction in Arabidopsis. Plant Biol (Stuttg) 2013; 15:405-14. [PMID: 22759307 DOI: 10.1111/j.1438-8677.2012.00630.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Cellulose is the major component of plant cell walls and is an important source of industrial raw material. Although cellulose biosynthesis is one of the most important biochemical processes in plant biology, the regulatory mechanisms of cellulose synthesis are still unclear. Here, we report that 2,6-dichlorobenzonitrile (DCB), an inhibitor of cellulose synthesis, inhibits Arabidopsis root development in a dose- and time-dependent manner. When treated with DCB, the plant cell wall showed altered cellulose distribution and intensity, as shown by calcofluor white and S4B staining. Moreover, pectin deposition was reduced in the presence of DCB when immunostained with the monoclonal antibody JIM5, which was raised against pectin epitopes. This result was confirmed using Fourier transform infrared (FTIR) analysis. Confocal microscopy revealed that the organisation of the microtubule cytoskeleton was significantly disrupted in the presence of low concentrations of DCB, whereas the actin cytoskeleton only showed changes with the application of high DCB concentrations. In addition, the subcellular dynamics of Golgi bodies labelled with N-ST-YFP and TGN labelled with VHA-a1-GFP were both partially blocked by DCB. Transmission electron microscopy indicated that the cell wall structure was affected by DCB, as were the Golgi bodies. Scanning electron microscopy showed changes in the organisation of cellulose microfibrils. These results suggest that the inhibition of cellulose synthesis by DCB not only induced changes in the chemical composition of the root cell wall and cytoskeleton structure, but also changed the distribution of cellulose microfibrils, implying that cellulose plays an important role in root development in Arabidopsis.
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Affiliation(s)
- L Peng
- School of Life Science, Ningxia University, Yinchuan, China
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154
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155
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Wernicke A, Peng L, Yondorf M, Parashar B, Nori D, Chao K, Pannullo S, Boockvar J, Schwartz T. Phase I/II Study of Neurosurgical Resection and Intraoperative Cesium-131 Radio-isotope Brachytherapy in Patients With Newly Diagnosed Brain Metastases. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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156
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Peng L, Coplowitz S, Parashar B, Nori D, Chao K, Wernicke A. SEER-based Analysis of the Impact of Preoperative or Postoperative Radiation Therapy on Survival Outcomes for T3N0 Rectal Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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157
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Yang Y, Dong D, Peng L, Ling J, Xiao Y, Zhuang H. [A study on the relationship between HPV infection and the oncogenesis of primary squamous carcinoma of the lung.]. Zhongguo Fei Ai Za Zhi 2012; 1:35-6. [PMID: 20863461 DOI: 10.3779/j.issn.1009-3419.1998.01.09] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND To research the relationship between human papillomavirus (HPV) infection and the oncogenesis of primary squamous carcinoma of the lung. METHODS 50 formalin-fixed paraffin-embedded tissues of squamous cell carcinoma of the lung , 30 samples of areas of squamous epithelium metaplasia near tumors , and 30 samples of normal bronchial mucosa were detected for the presence of HPV DNA by polymerase chain reaction (PCR) . RESULTS In these samples , the positive detection rate of HPV DNA was 26%, 36.7% and 10% respectively. Of the detected HPV DNA , HPV16 was of the highest ratio. The positive rate of HPV6/11 and HPV16 in squamous cell carcinoma and squamous epithelium metaplasia had no significant difference by Chi-Square test ( P > 0. 05) . CONCLUSIONS These results suggest that HPV infection might play an important role in the oncogenesis of squamous cell carcinomas of the lung , and squamous epithelium metaplasia of the bronchus could be regarded as a precancer lesion. Compared with biotinylated DNA probes and hybridization technique , PCR has a higher sensitivity.
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Affiliation(s)
- Y Yang
- Department of Respiratory Medicine, Affiliated Hospital of Zunyi Medical College, Zunyi 563003, P.R.China
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158
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Wang Y, Quelever G, Peng L. The Seemingly Trivial Yet Challenging Synthesis of Poly(aminoester) Dendrimers. Curr Med Chem 2012; 19:5011-28. [DOI: 10.2174/0929867311209025011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2012] [Revised: 05/28/2012] [Accepted: 06/21/2012] [Indexed: 11/22/2022]
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159
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Bao Y, Fang J, Peng L, Yi Y, Liu K, Li W, Luo H. Comparison of Preincisional and Postincisional Parecoxib Administration on Postoperative Pain Control and Cytokine Response After Total Hip Replacement. J Int Med Res 2012. [PMID: 23206461 DOI: 10.1177/030006051204000518] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective: To investigate whether preincisional parecoxib administration can reduce postoperative pain and modulate the inflammatory cytokine response to a greater extent than preincisional parecoxib administration in total hip replacement patients. Methods: Patients were randomized to receive 40 mg parecoxib intravenously either before or after skin incision (preincisional and postincisional groups, respectively). Morphine was administered for postoperative analgesia. Visual analogue pain scale (VAS) scores and morphine consumption were recorded at 1, 6, 18 and 24 h postoperation. Plasma levels of interleukin (IL)-6, IL-8 and tumour necrosis factor-a were measured 30 min before skin incision and 6 h postoperation. Results: Compared with the post - incisional group, VAS pain scores at 1 and 6 h postoperation were significantly lower in the preincisional group. Morphine consumption was significantly lower in the preincisional group at 6, 18 and 24 h postoperation. In both groups, IL-6 and IL- 8 levels increased significantly at 6 h postoperation compared with pre - operation, and the preincisional group had significantly lower levels of IL-6 and IL-8 at 6 h postoperation compared with the postincisional group. Conclusions: Preincisional parecoxib administration reduced postoperative pain and morphine consumption compared with post - incisional administration, and attenuated IL-6 and IL-8 production 24 h after hip replacement surgery.
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Affiliation(s)
- Y Bao
- Department of Orthopaedics, Medical School of Yangtze University, Jingzhou, Hubei, China
| | - J Fang
- Department of Neurology, The Second People's Hospital of Jingzhou, Jingzhou, Hubei, China
| | - L Peng
- Department of Orthopaedics, The First People's Hospital of Jingzhou, Jingzhou, Hubei, China
| | - Y Yi
- Department of Orthopaedics, The First People's Hospital of Jingzhou, Jingzhou, Hubei, China
| | - K Liu
- Department of Orthopaedics, The First People's Hospital of Jingzhou, Jingzhou, Hubei, China
| | - W Li
- Department of Orthopaedics, The First People's Hospital of Jingzhou, Jingzhou, Hubei, China
| | - H Luo
- Department of Orthopaedics, The First People's Hospital of Jingzhou, Jingzhou, Hubei, China
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160
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Theis JF, de Parseval A, Honnen WJ, Phogat A, Ganapathi UC, Lai Z, Peng L, Reichman C, Moore PL, Morris L, Li Y, Hu S, Pinter A. Construction of SHIVs expressing quaternary neutralization epitopes in Env and mimicking the neutralization phenotype of typical HIV-1 isolates. Retrovirology 2012. [PMCID: PMC3441856 DOI: 10.1186/1742-4690-9-s2-p28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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161
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Abstract
It is well known that clinical hypothyroidism (CH) can induce cognitive deficits, and the decision to start treatment for CH with thyroxine is usually straightforward. However, the relationship of cognition dysfunction with subclinical hypothyroidism (SCH) is inconsistent, and the decision concerning the need to treat SCH is controversial. In the present study, we induced a SCH rat model by hemi-thyroid electrocauterisation; then employed a serial of behavioural tests, including a beam balance, open field task and Morris water maze (MWM), to investigate the behaviour performance of SCH rats; and finally explored the protein expression of phosphorylated extracellular signal-regulated kinase (ERK)1/2 in the hippocampus by western blotting. The results demonstrated that hemi-thyroid electrocauterised rats had an elevated plasma thyrotrophin-stimulating hormone (TSH) level, with normal free thyroxine (fT4) and triiodothyronine (T3) concentrations, which defines SCH in humans. If rat SCH is diagnosed according to measurements of both plasma TSH higher than 97.5 percentile for the sham group and fT4 in the range 2.5-97.5 percentile for the sham group, the success rate of SCH modelling was 66.6%. SCH decreased exploratory behaviour but did not affect motor function in rats, showing a negative correlation of exploratory behaviour with plasma TSH concentration. Moreover, SCH rats displayed an impairment of learning and memory ability in the MWM task, with a longer escape latency in the acquisition phase and a shorter duration in the target quadrant in the test phase compared to that of sham rats. The mechanism for this might be related to the increased plasma TSH concentration, the decreased hippocampal T3 level and the enhanced expression of phosphorylated ERK1/2 in the hippocampus. The results of the present study, together with the results obtained in other studies, suggest that treatment is necessary for SCH.
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Affiliation(s)
- J-F Ge
- School of Pharmacy, Anhui Medical University, Hefei, China.
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162
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Cao H, Liu XL, Fang XX, Peng L, Zhao T, Qu YR, Long M. The outer membrane protease T is involved in the pathogenesis of uropathogenic Escherichia coli. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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163
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Yang C, Su J, Zhang R, Peng L, Li Q. Identification and expression profiles of grass carp Ctenopharyngodon idella tlr7 in responses to double-stranded RNA and virus infection. J Fish Biol 2012; 80:2605-2622. [PMID: 22650436 DOI: 10.1111/j.1095-8649.2012.03316.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The toll-like receptor 7 (tlr7) gene was identified and characterized from grass carp Ctenopharyngodon idella (designated as citlr7), and the messenger (m)RNA expression profiles were examined in vivo and in vitro. The citlr7 genomic sequence consists of 4276 nucleotides (nts), including two exons and one intron. The full length of citlr7 complementary (c)DNA sequence is 3354 nts with the longest open reading frame (ORF) of 3156 nts encoding a peptide of 1051 amino acids. citlr7 mRNA expression was high in spleen, skin and heart, and low in hepatopancreas, muscle, head kidney and trunk kidney in healthy fish. The expression of citlr7 was rapidly and significantly up-regulated at 6 h after grass carp reovirus (GCRV) injection (72·91 fold, P < 0·05), and recovered to the original level at 24 h post-injection in the spleen. The citlr7 transcript was rapidly and significantly down-regulated at the 6 h time point (0·32 fold, P < 0·05) and retrieved the normal level at 72 h post-injection in the hepatopancreas. The citlr7 transcripts were rapidly and significantly inhibited at 2 h post-GCRV infection in the C. idella kidney (CIK) cell line (0·62 fold, P < 0·05), and were rapidly and significantly elevated by the stimulation of the synthetic double-stranded RNA polyriboinosinic-polyribocytidylic acid sodium salt [poly(I:C)] in CIK in a dose and time-dependent manner (P < 0·05). The results imply that citlr7 is involved in the responses to double-stranded RNA and virus infection.
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Affiliation(s)
- C Yang
- College of Animal Science and Technology College of Veterinary Medicine Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture, Yangling 712100, China
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164
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Abstract
HLA-A*24:02:55 differs from A*24:02:01:01 by a single nucleotide substitution at position 295, in exon 2.
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Affiliation(s)
- Y Guolong
- Institute of AIDS/HIV Control and Prevention, Centre for Disease Control and Prevention of Guangdong Province, Guangzhou, China
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165
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Katsogiannou M, Peng L, Catapano CV, Rocchi P. Active-targeted nanotherapy strategies for prostate cancer. Curr Cancer Drug Targets 2012; 11:954-65. [PMID: 21861840 DOI: 10.2174/156800911797264770] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2011] [Revised: 07/19/2011] [Accepted: 08/01/2011] [Indexed: 11/22/2022]
Abstract
Castration-resistant prostate cancer remains incurable and a major cause of mortality worldwide. The absence of effective therapeutic approaches for advanced prostate cancer has led to an intensive search for novel treatments. Emerging nanomedical approaches have shown promising results, in vitro and in vivo, in improving drug distribution and bioavailability, tumor penetration and in limiting toxicity. Nanoscaled carriers bearing finely controlled size and surface properties such as liposomes, dendrimers and nanoparticles have been developed for successful passive and active tumortargeting. Enhanced pharmacokinetics of nanotherapeutics, through improved target delivery and prolonged tissue halflife provides optimal drug delivery that is tumor-specific. Tumor-targeting may be improved through ligand directed delivery systems binding to tumor-specific surface receptors improving cellular uptake through receptor-mediated endocytosis. Recently published data have provided pre-clinical evidence showing the potential of active-targeted nanotherapeutics in prostate cancer therapy; unfortunately, only a few of these therapies have translated into early phase clinical trials development. Hence, progress of active-targeted nanotherapy improving efficiency of site-specific drug delivery is a critical challenge in future clinical treatment of prostate cancer. Exploring specific prostate cell-surface antigens or receptor overexpression may elaborate promising strategies for future therapeutic design. This review presents an overview of some new strategies for prostate cancer active-targeting nanotherapeutics.
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Affiliation(s)
- M Katsogiannou
- INSERM U624 Stress Cellulaire, Marseille, F-13288, France.
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166
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Li BG, Ma DQ, Xian ZY, Guan J, Luo KJ, Fan QW, Peng L, He W. The value of multislice spiral CT features of cavitary walls in differentiating between peripheral lung cancer cavities and single pulmonary tuberculous thick-walled cavities. Br J Radiol 2012; 85:147-52. [PMID: 22308219 DOI: 10.1259/bjr/79051309] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Form discordance of cavity walls (FDCW) and form concordance of cavity walls (FCCW) in multislice spiral CT (MSCT) were investigated to determine their value in differentiating between peripheral lung cancer cavities and single pulmonary tuberculous thick-walled cavities. An assessment of the role of multiplanar reconstruction (MPR) in detecting FDCW and FCCW was also performed. METHODS MSCT cross-sectional images of 116 consecutive cases (including 60 cases with available MPR images) with peripheral lung cancer cavities and 118 consecutive cases (including 62 cases with available MPR images) with single pulmonary tuberculous thick-walled cavities (wall thickness >3 mm) were retrospectively analysed. According to the characteristics of cavitary internal and external walls on MSCT, these cavities were divided into two types (FDCW and FCCW). FDCW was further divided into three subtypes (FDCW-I, FDCW-II and FDCW-III); FCCW was further divided into two subtypes (FCCW-I and FCCW-II). RESULTS On the cross-sectional and MPR images, the total detection rate of FDCW-I and FDCW-III in peripheral lung cancer cavities was 76.7% (89/116) and 93.3% (56/60), respectively, whereas the total detection rate of FCCW-I and FCCW-II in single pulmonary tuberculous thick-walled cavities was 75.4% (89/118) and 91.9% (57/62), respectively. CONCLUSIONS FDCW-I, FDCW-III, FCCW-I and FCCW-II were valuable in differentiating between peripheral lung cancer cavities and single pulmonary tuberculous thick-walled cavities. MPR could improve the detection of FDCW-I and FDCW-III in peripheral lung cancer cavities and FCCW-I and FCCW-II in single pulmonary tuberculous thick-walled cavities.
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Affiliation(s)
- B-G Li
- Department of Radiology, The First Affiliated Hospital, Zunyi Medical College, Zunyi, Guizhou Province, China.
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167
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Jing S, Liu B, Peng L, Peng X, Zhu L, Fu Q, He G. Development and use of EST-SSR markers for assessing genetic diversity in the brown planthopper (Nilaparvata lugens Stål). Bull Entomol Res 2012; 102:113-122. [PMID: 21896240 DOI: 10.1017/s0007485311000435] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To assess genetic diversity in populations of the brown planthopper (Nilaparvata lugens Stål) (Homoptera: Delphacidae), we have developed and applied microsatellite, or simple sequence repeat (SSR), markers from expressed sequence tags (ESTs). We found that the brown planthopper clusters of ESTs were rich in SSRs with unique frequencies and distributions of SSR motifs. Three hundred and fifty-one EST-SSR markers were developed and yielded clear bands from samples of four brown planthopper populations. High cross-species transferability of these markers was detected in the closely related planthopper N. muiri. The newly developed EST-SSR markers provided sufficient resolution to distinguish within and among biotypes. Analyses based on SSR data revealed host resistance-based genetic differentiation among different brown planthopper populations; the genetic diversity of populations feeding on susceptible rice varieties was lower than that of populations feeding on resistant rice varieties. This is the first large-scale development of brown planthopper SSR markers, which will be useful for future molecular genetics and genomics studies of this serious agricultural pest.
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Affiliation(s)
- S Jing
- State Key Laboratory of Hybrid Rice, College of Life Science, Wuhan University, Wuhan, People's Republic of China
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168
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Liu L, Zhou C, Zhou L, Peng L, Li D, Zhang X, Zhou M, Kuang P, Yuan Q, Song X, Yang M. Functional FEN1 genetic variants contribute to risk of hepatocellular carcinoma, esophageal cancer, gastric cancer and colorectal cancer. Carcinogenesis 2011; 33:119-23. [DOI: 10.1093/carcin/bgr250] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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169
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Zhang Q, Lu J, Peng L, Li P, Yang Z, Xiong F, Jiang R, Fu S. The Role of Intraoperative Radiotherapy in Adjuvant Treatment Modality for T3 Rectal Adenocarcinoma. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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170
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Peng L, Jiayi T, Fang Y, Long C, Yi F, Ma GS. Effects and mechanisms of ultrasound mediated nitric oxide microbubbles on migration of rat bone marrow mesenchymal stem cells. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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171
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Chankvetadze L, Ghibradze N, Karchkhadze M, Peng L, Farkas T, Chankvetadze B. Enantiomer elution order reversal of fluorenylmethoxycarbonyl-isoleucine in high-performance liquid chromatography by changing the mobile phase temperature and composition. J Chromatogr A 2011; 1218:6554-60. [DOI: 10.1016/j.chroma.2011.06.068] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2011] [Revised: 06/15/2011] [Accepted: 06/16/2011] [Indexed: 10/18/2022]
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172
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Liu J, Peng L, Yan Y, Cao H, Zhang SQ, Deng ZD. PP-096 Different clinical features of spontaneous decrease of HBV DNA level between HBeAg-positive and HBeAg-negative chronic hepatitis B patients. Int J Infect Dis 2011. [DOI: 10.1016/s1201-9712(11)60248-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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173
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Langell M, Carson G, Smith S, Peng L, Nassir M. The Valence Electronic Structure of Co3O4: Is It a Charge-Transfer Insulator? ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-547-255] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractDespite the relevance to a variety of materials applications, the electronic and bonding properties of spinel transition metal oxides are not well established. We report here the slow oxidation of CoO(100) to Co3O4, studied by photoemission (UPS and XPS), low energy electron diffraction (LEED) and high resolution electron energy loss spectroscopy (HREELS) with the aim of elucidating the valence band electronic structure of the Co3O4 spinel. The original Mott insulator picture of the parent CoO substrate has been revised in recent times, after careful analyses and extensive debate, to the more detailed charge-transfer insulator model which includes some admixture of oxygen 2p levels in the 3d-derived valence band. No equivalent band structure analysis has been performed on the spinel oxides, perhaps in part because of the greater complexity of the 56-atom unit cell with two different cation lattice sites and oxidation states. In this study, we determine the valence band structure of the spinel oxide and address the question of whether Co3O4 can be modeled as a charge-transfer insulator in analogy with its closely related rocksalt substrate.
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174
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Paulose M, Peng L, Varghese O, Popat K, LaTempa T, Bao N, Desai T, Grimes C. Corrigendum to “Fabrication of mechanically robust, large area, polycrystalline nanotubular/porous TiO2 membranes” [J. Membr. Sci. 319 (2008) 199–205]. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2010.09.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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175
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Peng L, Wang G, Liao W, Yao H, Huang S, Li YQ. Intracellular ethanol accumulation in yeast cells during aerobic fermentation: a Raman spectroscopic exploration. Lett Appl Microbiol 2010; 51:632-8. [DOI: 10.1111/j.1472-765x.2010.02941.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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176
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177
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Peng L, Zhang JP, Li M, Li LJ, Xu YZ, Zhang GY, Yang C, Zhou YN. e0211 Si Miao Yong An decoction promotes atherosclerotic plaque stability in vulnerable plaque rabbits. Heart 2010. [DOI: 10.1136/hrt.2010.208967.211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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178
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Paulose M, Peng L, Varghese O, Popat K, LaTempa T, Bao N, Desai T, Grimes C. WITHDRAWN: Corrigendum to “Fabrication of mechanically robust, large area, polycrystalline nanotubular/porous TiO2 membranes” [J. Membr. Sci. 319 (2008) 199–205]. J Memb Sci 2010. [DOI: 10.1016/j.memsci.2010.09.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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179
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Liu J, Peng L, Luo Y. e0109 The effects of C-reactive protein on Toll-like receptor 4 signal transduction on CD14+ monocyte. Heart 2010. [DOI: 10.1136/hrt.2010.208967.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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180
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Xiehui C, Peng L, Xiaoping H, Dongming W, Songming C, Zeming Y, Zhifan C, Wenmin X, Liping C. e0222 Effects and function mechanism of hydrogen sulfide on myocardial ischaemia reperfusion arrhythmia in rats. Heart 2010. [DOI: 10.1136/hrt.2010.208967.222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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181
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Liu J, Peng L, Luo Y. e0110 The effects of atorvastatin on C-reactive protein induced Toll-like receptor 4 expression on CD14+ monocyte. Heart 2010. [DOI: 10.1136/hrt.2010.208967.110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Abstract
AIM To investigate the role of Wnt5a in the process of differentiation of human dental papilla cells (HDPCs). METHODOLOGY Recombinant adenovirus encoding full-length Wnt5a cDNA was constructed to investigate the biological role of Wnt5a on the differentiation of HDPCs. The effect of Wnt5a on HDPCs differentiation was determined by ALP activity assay, ALP staining and mineral induction assay. Mineralization-related gene expressions were assessed by RT-PCR. RESULTS Immunostaining revealed Wnt5a expression in the odontoblast layer and dental papilla tissue. Over-expression of Wnt5a by transfecting HDPCs with an Wnt5a-carrying construct increased ALPase activity and the formation of mineralized nodules of HDPCs. RT-PCR analysis showed that the expressions of mineralization-related genes, such as bone sialoprotein, collagen type I, osteonectin, osteopontin (OCN), dentine matrix protein-1 were up-regulated by Wnt5a. CONCLUSIONS Wnt5a promoted differentiation of HDPCs.
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Affiliation(s)
- L Peng
- West China Hospital of Stomatology, Sichuan University, Chengdu, China
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183
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Yu S, Peng L, Xie X, Peng F, Fang C, Wang Y, Lan G. Correlation Between HLA and Posttransplantation Diabetes Mellitus in the Han Population in South China. Transplant Proc 2010; 42:2509-12. [DOI: 10.1016/j.transproceed.2010.04.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Revised: 05/28/2009] [Accepted: 04/16/2010] [Indexed: 10/19/2022]
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184
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Xia Y, Qu F, Peng L. Triazole Nucleoside Derivatives Bearing Aryl Functionalities on the Nucleobases Show Antiviral and Anticancer Activity. Mini Rev Med Chem 2010; 10:806-21. [PMID: 20482498 DOI: 10.2174/138955710791608316] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2010] [Accepted: 05/15/2010] [Indexed: 11/22/2022]
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185
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Yang L, Zhang Y, Dong R, Peng L, Liu X, Wang Y, Cheng X. Effects of adenoviral-mediated coexpression of bone morphogenetic protein-7 and insulin-like growth factor-1 on human periodontal ligament cells. J Periodontal Res 2010; 45:532-40. [PMID: 20412417 DOI: 10.1111/j.1600-0765.2009.01268.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND OBJECTIVE Bone morphogenetic protein-7 (BMP-7) and insulin-like growth factor-1 (IGF-1) are important in periodontal reconstruction. However, their synergistic effect in periodontal regeneration by gene delivery has not been reported. In this study, gene delivery of these two growth factors to human periodontal ligament cells (hPDLCs) was examined for its effects on cell proliferation and differentiation. MATERIAL AND METHODS Recombinant adenoviruses containing both human BMP-7 and IGF-1 cDNA created by introducing the internal ribosome entry site (IRES) sequence were used to transfer the genes into hPDLCs. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and cell cycle analysis were used to observe their effects on cell proliferation, while alkaline phosphatase activity measurement, RT-PCR and in vivo tests were conducted to investigate their effects on cell differentiation. RESULTS The proliferation of hPDLCs transduced by adenoviruses coexpressing BMP-7 and IGF-1 was suppressed while their differentiation ability was enhanced. There was a synergism of BMP-7 and IGF-1 in up-regulating alkaline phosphatase activity and mRNA levels of collagen type I and Runx2. Implantation in vivo with scaffolds illustrated that the transduced cells exhibited osteogenic differentiation and formed bone-like structures. CONCLUSION The combined delivery of BMP-7 and IGF-1 genes using an IRES-based strategy synergistically enhanced differentiation of hPDLCs. It is suggested that this could be a new potential method in gene therapy for periodontal reconstruction.
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Affiliation(s)
- L Yang
- Key Laboratory for Oral Biomedical Engineering, Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, PR China
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186
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Peng L, Dong G, Xu P, Ren L, Wang C, Aragon M, Zhou X, Ye L. Expression of Wnt5a in tooth germs and the related signal transduction analysis. Arch Oral Biol 2010; 55:108-14. [DOI: 10.1016/j.archoralbio.2009.12.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Revised: 11/19/2009] [Accepted: 12/04/2009] [Indexed: 11/27/2022]
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187
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Banga SS, Peng L, Dasgupta T, Palejwala V, Ozer HL. PHF10 is required for cell proliferation in normal and SV40-immortalized human fibroblast cells. Cytogenet Genome Res 2010; 126:227-42. [PMID: 20068294 PMCID: PMC3711003 DOI: 10.1159/000251960] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2009] [Indexed: 01/28/2023] Open
Abstract
Normal human diploid fibroblasts have limited life span in culture and undergo replicative senescence after 50-60 population doublings. On the contrary, cancer cells typically divide indefinitely and are immortal. Expression of SV40 large T and small t antigens in human fibroblasts transiently extends their life span by 20-30 population doublings and facilitates immortalization. We have identified a rearrangement in chromosome 6 shared by SV40-transformed human fibroblasts. Rearrangements involving chromosome 6 are among the most frequent in human carcinogenesis. In this paper, we extend analysis of the 6q26-q27 region, a putative site for a growth suppressor gene designated SEN6 involved in immortalization of SV40-transformed cells. Detailed molecular characterization of the rearranged chromosomes (6q*, normal appearing; and 6q(t), translocated) in the SV40-immortalized cell line HALneo by isolating each of these 2 chromosomes in mouse/HAL somatic cell hybrids is presented. Analysis of these mouse/HAL somatic cell hybrids with polymorphic and nonpolymorphic markers revealed that the 6q* has undergone a chromosomal break in the MLLT4 gene (alias AF6). This result in conjunction with previous published observations leads us to conclude that SEN6 lies between MLLT4 and TBP at chromosomal region 6q27. Examination of different genes (MLLT4, DLL1, FAM120B, PHF10) located within this interval that are expressed in HS74 normal fibroblast cells reveals that overexpression of epitope-tagged truncated PHF10 cDNAs resulted in reduced cell proliferation in multiple cell lines. Paradoxically, down-regulation of PHF10 by RNAi also resulted in loss of cell proliferation in normal fibroblast cells, indicating PHF10 function is required for cell growth. Taken together, these observations suggest that decreased cell proliferation with epitope-tagged truncated PHF10 proteins may be due to dominant negative effects or due to unregulated expression of these mutant proteins. Hence we conclude that PHF10 is not SEN6 but is required for cell growth.
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Affiliation(s)
- S S Banga
- Department of Microbiology and Molecular Genetics, New Jersey Medical School-University Hospital Cancer Center, University of Medicine and Dentistry of New Jersey, Newark, NJ 07103, USA. banga @ umdnj.edu
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188
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Peng L, Ye L, Dong G, Ren L, Wang C, Xu P, Zhou X. WNT5A inhibits human dental papilla cell proliferation and migration. Biochem Biophys Res Commun 2009; 390:1072-8. [DOI: 10.1016/j.bbrc.2009.10.136] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2009] [Accepted: 10/23/2009] [Indexed: 10/20/2022]
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189
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Han X, Peng L, Liu G, Wang J, Qu C. UP-2.082: CT Feature Analysis of Renal Cell Carcinoma: Report of 300 Cases. Urology 2009. [DOI: 10.1016/j.urology.2009.07.301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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191
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Abstract
We consider the problem of evaluating a statistical hypothesis when some model characteristics are nonidentifiable from observed data. Such a scenario is common in meta-analysis for assessing publication bias and in longitudinal studies for evaluating a covariate effect when dropouts are likely to be nonignorable. One possible approach to this problem is to fix a minimal set of sensitivity parameters conditional upon which hypothesized parameters are identifiable. Here, we extend this idea and show how to evaluate the hypothesis of interest using an infimum statistic over the whole support of the sensitivity parameter. We characterize the limiting distribution of the statistic as a process in the sensitivity parameter, which involves a careful theoretical analysis of its behavior under model misspecification. In practice, we suggest a nonparametric bootstrap procedure to implement this infimum test as well as to construct confidence bands for simultaneous pointwise tests across all values of the sensitivity parameter, adjusting for multiple testing. The methodology's practical utility is illustrated in an analysis of a longitudinal psychiatric study.
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Affiliation(s)
- D Todem
- Division of Biostatistics, Department of Epidemiology, Michigan State University, B601 West Fee Hall, East Lansing, Michigan 48823, USA.
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192
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Dai J, Peng L, Fan K, Wang H, Wei R, Ji G, Cai J, Lu B, Li B, Zhang D, Kang Y, Tan M, Qian W, Guo Y. Osteopontin induces angiogenesis through activation of PI3K/AKT and ERK1/2 in endothelial cells. Oncogene 2009; 28:3412-22. [PMID: 19597469 DOI: 10.1038/onc.2009.189] [Citation(s) in RCA: 237] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Angiogenesis is a key step in tumor growth and metastasis. The mechanism by which osteopontin (OPN) induces the angiogenesis of endothelial cells remains unclear. Here, we show that OPN confers cytoprotection through the activation of the PI3K/Akt pathway with subsequent upregulation of Bcl-xL and activation of nuclear factor-kappaB. OPN enhances the expression of vascular endothelial growth factor (VEGF) through the phosphorylation of AKT and extracellular signal-regulated kinase (ERK). In turn, OPN-induced VEGF activates PI3K/AKT and the ERK1/2 pathway as a positive feedback signal. Blocking the feedback signal by anti-VEGF antibody, PI3-kinase inhibitor or ERK inhibitor can partially inhibit the OPN-induced human umbilical vein endothelial cell (HUVEC) motility, proliferation and tube formation, while blocking the signal by anti-OPN or anti-alphavbeta3 antibody completely abrogates the biological effects of OPN on HUVECs. In addition, blood vessel formation is also investigated in vivo. The antiangiogenesis efficacy of anti-OPN antibody in vivo is more effective than that of anti-VEGF antibody, which only blocks the feedback signals. These data show that OPN enhances angiogenesis directly through PI3K/AKT- and ERK-mediated pathways with VEGF acting as a positive feedback signal. The results suggest that OPN might be a valuable target for developing novel antiangiogenesis therapy for treatment of cancer.
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Affiliation(s)
- J Dai
- International Joint Cancer Institute and General Hospital Cancer Center, The Second Military Medical University, Shanghai, PR China
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193
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Specht A, Loudwig S, Peng L, Goeldner M. Complexing photolabile cholinergic ligands with synthetic and biological receptors: a dynamic survey. J INCL PHENOM MACRO 2009. [DOI: 10.1007/s10847-009-9603-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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194
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Yan G, Simon T, Peng L, Liu C, Li J. SU-FF-T-233: Commissioning and Quality Assurance of VMAT with An Ion Chamber Profiler. Med Phys 2009. [DOI: 10.1118/1.3181709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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195
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Peng L, Liu C, Kahler D, Samant S, Li J, Palta J. SU-FF-J-133: Commissioning a New Frameless Intracranial Stereotactic Positioning System (ISPS): The Real-Time 3D Stereo-Vision Surface Imaging System. Med Phys 2009. [DOI: 10.1118/1.3181425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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196
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Yu B, Zhang M, Wu W, Chen L, Peng L, Bian G, Fu J, Fei C. Neoadjuvant chemoradiotherapy for locally advanced low-lying rectal cancer. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15095 Objective: The aim of this trial was to explore the possibility of further improvement of efficacy in neoadjuvant chemoradiation for the treatment of locally advanced low-lying rectal cancer and the management of patients with clinical complete regression. Methods: 192 cases with locally advanced low-lying rectal cancer (T3/T4 or N+) received preoperative radiotherapy comprising 40–46 Gy/20–23 fractions and concomitant oral capecitabine 625 mg/m2 bid for 10 weeks prior to surgery. Curative resection with TME was carried out 6 weeks after the end of radiation. Results: Patients (pts) were recruited from May 2001 through August 2007. Overall, 117 pts (60.9%) experienced adverse events but only 2 suffered from grade 3 hand-foot syndrome. 17 pts (8.9%) had clinical complete tumor regression without surgery, 175 pts underwent curative resection including of 134 pts with low anterior resection (LAR), 32 pts with ultra-low anterior resection with Parks’ coloanal anastomosis and among them 6 pts with diverting temporary colostomy and 9 pts with APR. Sphincter preservation was achieved in 95.3%. Pathologically, 24 pts (12.5%) showed CR together with 17 pts with clinical CR; the overall CR rate was 21.4%. According to the pathological staging: T0N0 41 cases, T2N0 43 cases, T3N0 77 cases, T4N0 5 cases, T2N1 11 cases, T3N1 13 cases, T4N0 5 cases, and T4N1 2 cases; in semiquantitative Dworak's tumor regression grade, TRG0 8 pts,TRG1 32, TRG2 28,TRG3 83 and TRG4 41 with an overall tumor downstaging of 79.2%. There were no operative deaths, 5 pts suffered from rectovaginal fistulas and 4 anastomotic leakages with an overall anastomotic leakage rate of 5.1% (9/175) and all recovered without further events. All patients have been followed up for a median of 46 months (range 12–87). During the time, 11 pts had lung metastases, 6 liver metastases and 7 had local recurrences. The 3-year disease-free survival was 86.6% and overall survival was 92.6%. Conclusions: Neoadjuvant chemoradiotherapy has high efficacy resulting in tumor down-staging, increased resectability and sphincter preservation, and a reduction in local recurrences. Meanwhile those patients with clinical complete response can be followed up closely and safely without surgery. No significant financial relationships to disclose.
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Affiliation(s)
- B. Yu
- Rui Jin Hospital Medical School Shanghai Jiao Tong University, Shanghai, China; Shanghai No. 8 People's Hospital, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China
| | - M. Zhang
- Rui Jin Hospital Medical School Shanghai Jiao Tong University, Shanghai, China; Shanghai No. 8 People's Hospital, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China
| | - W. Wu
- Rui Jin Hospital Medical School Shanghai Jiao Tong University, Shanghai, China; Shanghai No. 8 People's Hospital, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China
| | - L. Chen
- Rui Jin Hospital Medical School Shanghai Jiao Tong University, Shanghai, China; Shanghai No. 8 People's Hospital, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China
| | - L. Peng
- Rui Jin Hospital Medical School Shanghai Jiao Tong University, Shanghai, China; Shanghai No. 8 People's Hospital, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China
| | - G. Bian
- Rui Jin Hospital Medical School Shanghai Jiao Tong University, Shanghai, China; Shanghai No. 8 People's Hospital, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China
| | - J. Fu
- Rui Jin Hospital Medical School Shanghai Jiao Tong University, Shanghai, China; Shanghai No. 8 People's Hospital, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China
| | - C. Fei
- Rui Jin Hospital Medical School Shanghai Jiao Tong University, Shanghai, China; Shanghai No. 8 People's Hospital, Shanghai, China; Shanghai Sixth People's Hospital, Shanghai, China
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197
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Setlow B, Peng L, Loshon CA, Li YQ, Christie G, Setlow P. Characterization of the germination of Bacillus megaterium spores lacking enzymes that degrade the spore cortex. J Appl Microbiol 2009; 107:318-28. [PMID: 19302310 DOI: 10.1111/j.1365-2672.2009.04210.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS To determine roles of cortex lytic enzymes (CLEs) in Bacillus megaterium spore germination. METHODS AND RESULTS Genes for B. megaterium CLEs CwlJ and SleB were inactivated and effects of loss of one or both on germination were assessed. Loss of CwlJ or SleB did not prevent completion of germination with agents that activate the spore's germinant receptors, but loss of CwlJ slowed the release of dipicolinic acid (DPA). Loss of both CLEs also did not prevent release of DPA and glutamate during germination with KBr. However, cwlJ sleB spores had decreased viability, and could not complete germination. Loss of CwlJ eliminated spore germination with Ca2+ chelated to DPA (Ca-DPA), but loss of CwlJ and SleB did not affect DPA release in dodecylamine germination. CONCLUSIONS CwlJ and SleB play redundant roles in cortex degradation during B. megaterium spore germination, and CwlJ accelerates DPA release and is essential for Ca-DPA germination. The roles of these CLEs are similar in germination of B. megaterium and Bacillus subtilis spores. SIGNIFICANCE AND IMPACT OF THE STUDY These results indicate that redundant roles of CwlJ and SleB in cortex degradation during germination are similar in spores of Bacillus species; consequently, inhibition of these enzymes will prevent germination of Bacillus spores.
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Affiliation(s)
- B Setlow
- Department of Molecular, Microbial and Structural Biology, University of Connecticut Health Center, Farmington, CT 06030-3305, USA.
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198
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Lan G, Peng L, Xie X, Peng F, Wang Y, Yu S. Alendronate is effective to treat bone loss in renal transplantation recipients. Transplant Proc 2009; 40:3496-8. [PMID: 19100422 DOI: 10.1016/j.transproceed.2008.09.034] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2007] [Revised: 06/15/2008] [Accepted: 09/03/2008] [Indexed: 11/19/2022]
Abstract
UNLABELLED Bone loss is a common complication among renal transplant patients. Some studies have shown that alendronate may be effective to treat bone loss in these patients. In this study, we have reported our experience with administration of alendronate to treat bone loss in renal transplanted patients. METHODS The 46 kidney transplant recipients with bone loss were randomly divided into 2 groups: group I was treated with calcium and calcitriol, and group II with calcium, calcitriol, and alendronate. We examined bone mineral density (BMD) and biochemical indicators of both groups. All patients received cyclosporine and prednisone treatment. RESULTS There was no significant difference in age, body mass index, gender, immunosuppression, time since transplantation, 25(OH)D(3), or intact parathyroid hormone levels at study commencement. The BMD of the femoral neck was significantly increased (P < .05), and the serum type I collagen-cross-linked N telopeptide (NTx) dramatically (P < .05) decreased in posttransplantation group II recipients treated with calcium, calcitriol, and alendronate. There were also significant differences in BMD and serum NTx between recipients treated with versus without alendronate (P < .05). CONCLUSION At least in the short term, alendronate is a effective inhibitor for the treatment of bone loss in renal transplantation patients.
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Affiliation(s)
- G Lan
- Center of Organ Transplantation, Second XiangYa Hospital, Central South University, Changsha, China
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199
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Zhu Z, Zhang M, Gao S, Song Y, Li C, Peng L, Guo Z, Wang Y, Liu S, Kong M, Huang Q. Preliminary experiments on the corrosion of CLAM steel in flowing eutectic LiPb. Fusion Engineering and Design 2009. [DOI: 10.1016/j.fusengdes.2008.06.055] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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200
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Cao H, Zhong H, Zhao W, Li J, Peng L. B- and T-cell Epitope of the Envelope Glycoprotein E of Dengue Virus Defined by Bioinformatics, ELISA and Enzyme-linked Immunospot. Int J Infect Dis 2008. [DOI: 10.1016/j.ijid.2008.05.798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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