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Xu T, Li M, Tian Y, Song JT, Ni C, Guo XY. [Clinical evaluation of in-plane ultrasound-guided thoracic paravertebral block using laterally intercostal approach]. BEIJING DA XUE XUE BAO. YI XUE BAN = JOURNAL OF PEKING UNIVERSITY. HEALTH SCIENCES 2017; 49:148-152. [PMID: 28203022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To evaluate the feasibility and success rate of in-plane ultrasound-guided paravertebral block using laterally intercostal approach. METHODS In the study, 27 patients undergoing elective thoracic surgery were selected to do paravertebral block preoperatively. The fifth intercostal space was scanned by ultrasound probe which was placed along the long axis of the rib and 8 cm lateral to the midline of the spine. The needle was advanced in increments aiming at the space between the internal and innermost intercostal muscles. Once the space between the muscles was achieved, 20 mL of 0.5% (mass fraction) ropivacaine was injected and a catheter was inserted. Whether the tip of catheter was in right place was evaluated by ultrasound image. The block dermatomes of cold sensation were recorded 10, 20 and 30 min after the bolus drug was given. Then 0.2% ropivacaine was infused with 6 mL/h via the catheter by an analgesia pump postoperatively. The block dermatomes of cold sensation and pain score were recorded 1, 6, 24 and 48 h postoperatively. RESULTS The first attempt success rate of catheteration was 81.48% (22/27); the tips of catheter were proved in right places after the second or third attempt in 5 patients. The median numbers of the block dermatomes 10, 20 and 30 min after the bolus drug was given were 2, 3, 4; the median numbers of block dermatomes were 5, 5, 5, 4, and of pain score were 1, 1, 2, 2 at 1, 6, 24, 48 h postoperatively; no case of bilateral block, pneumothorax or vessel puncture occurred. CONCLUSION Thoracic paravertebral block using laterally intercostal approach is feasible, which has high success rate of block and low rate of complications.
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Zhang J, Cheng R, Liang J, Ni C, Li M, Yao Z. Report of a child with sporadic familial progressive hyper- and hypopigmentation caused by a novel KITLG mutation. Br J Dermatol 2016; 175:1369-1371. [PMID: 27106731 DOI: 10.1111/bjd.14694] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Li M, Li Z, Wang J, Ni C, Sun Z, Wilson NJ, Zhang J, Chen F, Li X, Du X, Yu H, Zhang L, Smith FJD, Zhang G, Yao Z. Mutations in the mevalonate pathway genes in Chinese patients with porokeratosis. J Eur Acad Dermatol Venereol 2016; 30:1512-7. [PMID: 27422687 DOI: 10.1111/jdv.13653] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2015] [Accepted: 02/11/2016] [Indexed: 12/26/2022]
Abstract
BACKGROUND Porokeratosis (PK, MIM 175800) is a chronic autosomal dominant cutaneous keratinization disorder, which has a wide variety of clinical manifestations. OBJECTIVES We analysed the molecular basis of 10 families and 12 sporadic cases with different subtypes of porokeratosis in the Chinese population. METHODS Genomic DNA was extracted from peripheral blood samples. Mutation screening was performed by direct sequencing of exons and flanking intron-exon boundaries for the entire coding region of four mevalonate pathway genes and SLC17A9 gene. RESULTS We detected three novel mutations and seven previously described mutations by direct sequence analysis of the PCR products. Mutations p.Phe249Ser and p.Asn292Ser in mevalonate decarboxylase (MVD) were the most common mutations in this PK cohort; their presence was 27.3% and 13.6% respectively. CONCLUSIONS This study extended the mutation spectrum of PK in the Chinese Han population and provided further evidence for the genetic basis of PK. We first identified MVD simultaneously responsible for porokeratosis palmaris et plantaris disseminate development and confirmed the genotype-phenotype correlations.
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Macias-Montero M, Askari S, Mitra S, Rocks C, Ni C, Svrcek V, Connor PA, Maguire P, Irvine JTS, Mariotti D. Energy band diagram of device-grade silicon nanocrystals. NANOSCALE 2016; 8:6623-6628. [PMID: 26939617 DOI: 10.1039/c5nr07705b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Device grade silicon nanocrystals (NCs) are synthesized using an atmospheric-pressure plasma technique. The Si NCs have a small and well defined size of about 2.3 nm. The synthesis system allows for the direct creation of thin films, enabling a range of measurements to be performed and easy implementation of this material in different devices. The chemical stability of the Si NCs is evaluated, showing relatively long-term durability thanks to hydrogen surface terminations. Optical and electrical characterization techniques, including Kelvin probe, ultraviolet photoemission spectroscopy and Mott-Schottky analysis, are employed to determine the energy band diagram of the Si NCs.
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Lv Q, Gong L, Zhang T, Ye J, Chai L, Ni C, Mao Y. Prognostic value of circulating tumor cells in metastatic breast cancer: a systemic review and meta-analysis. Clin Transl Oncol 2016; 18:322-30. [PMID: 26260915 DOI: 10.1007/s12094-015-1372-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 07/28/2015] [Indexed: 12/31/2022]
Abstract
OBJECTIVE Metastatic breast cancer (MBC) remains the main cause of cancer-related death, and the clinical significance and prognostic role of circulating tumor cells (CTCs) in metastatic breast cancer are still controversial. Here, we conducted a meta-analysis to clarify the correlation between CTCs and the clinicopathological features and prognosis of MBC. METHODS We performed a comprehensive search of Pubmed and the ISI Web of Science through December 2014. Only articles that focused on MBC patients and detected CTCs using the CellSearch system were included. The associations between CTCs and survival rate and clinicopathological parameters, including molecular pattern, metastatic region and treatment response, were evaluated. RESULTS This meta-analysis included 24 studies (3701 MBC patients), 13 prospective studies and 11 retrospective studies. We found that CTCs were more frequently detected with HER2 + primary tumors (pooled RR = 0.73, 95 % CI = 0.63-0.84). Additionally, higher CTC numbers indicated a worse treatment response (RR = 0.56, 95 % CI = 0.40-0.79), poorer PFS (RR = 0.64, 95 % CI = 0.56-0.73) and poorer OS (RR = 0.69, 95 % CI = 0.64-0.75) in MBC patients. CONCLUSION Based on these results, we propose that HER2 positivity could be a significant risk factor for the presence of CTCs. Additionally, CTCs have a significant prognostic value for MBC patients. Therefore, CTCs should be continually monitored to guide the treatment of MBC patients, especially those with HER2 + primary tumors.
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Zhang J, Cheng R, Liang J, Ni C, Li M, Yao Z. Lentiginous phenotypes caused by diverse pathogenic genes (SASH1 and PTPN11): clinical and molecular discrimination. Clin Genet 2016; 90:372-7. [PMID: 27659786 DOI: 10.1111/cge.12728] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Revised: 01/05/2016] [Accepted: 01/06/2016] [Indexed: 02/03/2023]
Abstract
Pathogenic mutations in genes (SASH1 and PTPN11) can cause a rare genetic disorder associated with pigmentation defects and the well-known LEOPARD syndrome, respectively. Both conditions presented with lentiginous phenotypes. The aim of this study was to arrive at definite diagnoses of three Chinese boys with clinically suspected lentigines-related syndromes. ADAR1, ABCB6, SASH1 and PTPN11 were candidate genes for mutational screening. Sanger sequencing was performed to identify the mutations, whereas bioinformatic analysis was used to predict the pathogenicity of novel missense mutations. Two novel mutations c.1537A>C (p.Ser513Arg) and 1527_1530dupAAGT (p.Leu511Lysfs*21) in SASH1 and a common p.Thr468Met mutation in PTPN11 were detected in three pediatric patients with lentiginous phenotypes, respectively. Comparisons between clinical presentations showed that SASH1-related phenotypes can exhibit hyper- and hypopigmentation on the trunk and extremities, similar to dyschromatosis, while scattered café au-lait spots usually appeared in PTPN11-related LEOPARD syndrome. Furthermore, the similarity in the clinical presentations of Peutz-Jeghers syndrome, Laugier-Hunziker syndrome, xeroderma pigmentosum, neurofibromatosis type I, suggesting that these conditions should be added into the differential diagnoses of lentiginous phenotypes.
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Harwell JR, Baikie TK, Baikie ID, Payne JL, Ni C, Irvine JTS, Turnbull GA, Samuel IDW. Probing the energy levels of perovskite solar cells via Kelvin probe and UV ambient pressure photoemission spectroscopy. Phys Chem Chem Phys 2016; 18:19738-45. [DOI: 10.1039/c6cp02446g] [Citation(s) in RCA: 75] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a study of the energy levels present in a perovskite solar cell using Kelvin probe and UV air photoemission measurements. By constructing a detailed map of the energy levels in the system we are able to predict the maximum open circuit voltage of the solar cell.
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Li M, Wang J, Zhang J, Ni C, Li X, Liang J, Cheng R, Li Z, Yao Z. Genome-wide linkage and exome sequencing analyses identify an initiation codon mutation ofKRT5in a unique Chinese family with generalized Dowling-Degos disease. Br J Dermatol 2015; 174:663-6. [PMID: 26440693 DOI: 10.1111/bjd.14178] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zhang J, Yan M, Cheng R, Ni C, Liang J, Li M, Yao Z. A rare RECQL4 indel mutation in a Chinese patient with Rothmund-Thomson syndrome. J Eur Acad Dermatol Venereol 2015; 30:e159-e161. [PMID: 26515231 DOI: 10.1111/jdv.13466] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Shen J, Zhang J, Wang Z, Ni C, Li H, Cheng R, Liang J, Li M, Yao Z. Gene diagnosis and prenatal genetic diagnosis of a case of dystrophic epidermolysis bullosa family caused by gonadosomatic mosaicism for the COL7A1 mutation p.Gly2043Arg in the pregnant mother. J Eur Acad Dermatol Venereol 2015; 30:1627-9. [PMID: 26289024 DOI: 10.1111/jdv.13229] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhang J, Cheng R, Ni C, Liang J, Li M, Yao Z. First Mal de Meleda report in Chinese Mainland: two families with a recurrent homozygous missense mutation in SLURP-1. J Eur Acad Dermatol Venereol 2015; 30:871-3. [PMID: 25763536 DOI: 10.1111/jdv.13038] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Luo C, Ji X, Fan J, Hou Z, Wang T, Wu B, Ni C. Annexin A5 promotes macrophage activation and contributes to pulmonary fibrosis induced by silica particles. Toxicol Ind Health 2015; 32:1628-38. [PMID: 25757482 DOI: 10.1177/0748233715572744] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVE To investigate the contributions and underlying molecular mechanisms of annexin A5 toward silica-induced pulmonary fibrosis. METHODS Male C57BL/6 mice were randomly divided into three groups and instilled intratracheally with silica, saline, or air. Mice were euthanized at 3, 7, 14, or 28 days following treatment. Annexin A5 levels in serum and lung tissues were detected by enzyme-linked immunosorbant assay (ELISA) assays or Western blots. The association of annexin A5 levels with silica-induced lung fibrosis was further investigated in the macrophage cell line, RAW264.7. Following exposure of these cells to silica at a concentration of 200 μg/ml for 6 or 12 h, the expression levels of transforming growth factor β1 (TGF-β1), interleukin 1α (IL-1α), Fas ligand (FasL), and their downstream targets were evaluated by Western blots. Furthermore, annexin A5 and FasL were knocked down by small interfering ribonucleic acid (siRNA) and TGF-β1 secretion into the cell culture medium was measured by ELISA assays or Western blots. RESULTS Mice treated with silica demonstrated lung fibrosis at 28 days following exposure, whereas, in controls, only mild and transient inflammation was evident at day 3 and day 7 postinstillation and was not present at day 14. Furthermore, silica-exposed mice exhibited significantly (p < 0.05) elevated levels of annexin A5 in serum and lung tissues, relative to control groups. Consistent with these findings, silica exposure of RAW264.7 cells for 6 or 12 h, led to an annexin A5-dependent increase in the expression levels of TGF-β1, IL-1α, FasL, and their downstream target molecules. These silica-induced changes were reversed by siRNA-mediated knockdown of annexin A5, but downregulation of FasL led to increased annexin A5 expression and reduced levels of TGF-β1, IL-1α, and FasL downstream target molecules. CONCLUSIONS These findings define a role of annexin A5 in promoting macrophage activation via Fas/FasL pathways in silica-induced lung fibrosis.
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Yu L, Grist SM, Nasseri SS, Cheng E, Hwang YCE, Ni C, Cheung KC. Core-shell hydrogel beads with extracellular matrix for tumor spheroid formation. BIOMICROFLUIDICS 2015; 9:024118. [PMID: 25945144 PMCID: PMC4401801 DOI: 10.1063/1.4918754] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 04/07/2015] [Indexed: 05/09/2023]
Abstract
Creating multicellular tumor spheroids is critical for characterizing anticancer treatments since they may provide a better model of the tumor than conventional monolayer culture. Moreover, tumor cell interaction with the extracellular matrix can determine cell organization and behavior. In this work, a microfluidic system was used to form cell-laden core-shell beads which incorporate elements of the extracellular matrix and support the formation of multicellular spheroids. The bead core (comprising a mixture of alginate, collagen, and reconstituted basement membrane, with gelation by temperature control) and shell (comprising alginate hydrogel, with gelation by ionic crosslinking) were simultaneously formed through flow focusing using a cooled flow path into the microfluidic chip. During droplet gelation, the alginate acts as a fast-gelling shell which aids in preventing droplet coalescence and in maintaining spherical droplet geometry during the slower gelation of the collagen and reconstituted basement membrane components as the beads warm up. After droplet gelation, the encapsulated MCF-7 cells proliferated to form uniform spheroids when the beads contained all three components: alginate, collagen, and reconstituted basement membrane. The dose-dependent response of the MCF-7 cell tumor spheroids to two anticancer drugs, docetaxel and tamoxifen, was compared to conventional monolayer culture.
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Sun Z, Zhang J, Guo Y, Ni C, Liang J, Cheng R, Li M, Yao Z. Genotype-phenotype correlation of xeroderma pigmentosum in a Chinese Han population. Br J Dermatol 2015; 172:1096-102. [PMID: 25256075 DOI: 10.1111/bjd.13429] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2014] [Indexed: 12/14/2022]
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Huang X, Shen L, Jin Y, Chen L, Zhou D, Xu G, Ni C. Comparison of uncovered stent placement across versus above the main duodenal papilla for malignant biliary obstruction. J Vasc Interv Radiol 2015; 26:432-7. [PMID: 25595724 DOI: 10.1016/j.jvir.2014.11.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 11/02/2014] [Accepted: 11/04/2014] [Indexed: 01/17/2023] Open
Abstract
PURPOSE To evaluate the differences in efficiency and complications of metal stent insertion across versus above the main duodenal papilla (MDP) in patients with malignant obstruction of the common bile duct (CBD). MATERIALS AND METHODS Records of 98 consecutive patients who underwent stent insertion for malignant CBD obstruction between 2004 and 2010 were retrospectively reviewed. Fifty-one patients (group 1) and 47 patients (group 2) were treated with stent insertion across and above the MDP, respectively. Primary stent patency, overall survival, complications, and changes in serum bilirubin level following stent insertion were assessed. RESULTS Infection appeared in 12 and four patients, respectively, in groups 1 and 2. The respective mean primary stent patency times were 307.8 days ± 20.2 and 490.7 days ± 40.7, and mean survival times were 245.1 days ± 17.4 and 286.3 days ± 20.2. Bilirubin reduction rates were 55.7% ± 16.6 and 61.1% ± 13.7 at 1 week and 84.2% ± 5.7 and 86.2% ± 5.7 at 1 month in groups 1 and 2, respectively. In group 2, the rate of infection was significantly lower (P = .044) and primary stent patency was longer (P = .019). However, there was no significant difference between groups in survival time (P = .074) or bilirubin reduction rate at 1 week (P = .083) or 1 month (P = .082). CONCLUSIONS Bile stent insertion above the MDP may achieve longer stent patency and a lower infection rate compared with placement across the MDP. For patients with malignant CBD obstruction, biliary stents should be placed above the papilla if papillary lesions are not invaded.
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Ni C, Zhang J, Zhang H, Cheng RH, Liang JY, Li CX, Li M, Yao ZR. A novel mutation in the COL7A1 gene results in a unique phenotype of epidermolysis bullosa pruriginosa. J Eur Acad Dermatol Venereol 2015; 30:535-6. [PMID: 25556825 DOI: 10.1111/jdv.12933] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Chen L, Ni C. CT-guided percutaneous osteoplasty as a treatment for painful malignant extravertebral bone lesions. J Vasc Interv Radiol 2014. [DOI: 10.1016/j.jvir.2013.12.383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Zhu X, Shen J, Ni C. Initial clinical experience of CT-guided percutaneous lung biopsy using an intelligent guiding device. J Vasc Interv Radiol 2014. [DOI: 10.1016/j.jvir.2013.12.275] [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] Open
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Duan P, Ni C. t-PA stimulates VEGF expression in endothelial cells via ERK2/p38 signaling pathways. DIE PHARMAZIE 2014; 69:70-75. [PMID: 24601228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Vascular endothelial growth factor (VEGF) plays an essential role in the initiation and regulation of angiogenesis, which is a crucial component of wound healing and vessel growth. Tissue-type plasminogen activator (t-PA) could stimulate angiogenesis but the precise mechanisms of their proangiogenic actions remain unclear. We investigated whether t-PA can induce VEGF expression in ECV304 and further explored the underlying signaling pathway(s) involved. Through adenovirus mediated overexpression of t-PA in ECV304 cells, we demonstrated that t-PA significantly increased both VEGF mRNA and protein expression. A further mechanistic study showed that both ERK and p38 MAPK activation were involved in this process. Incubation of RVEC with PD 98059 (MEK kinase inhibitor) significantly reduced t-PA-induced ERK2 activity, VEGF mRNA and protein expression. Furthermore, PD 98059 treatment almost completely abolished p38 activation. Our data suggest that t-PA-stimulates VEGF expression in RVEC via transactivation of p38 by ERK. One potential implication of this finding is that increased t-PA levels in thomb could facilitate vessel growth by stimulating VEGF synthesis and angiogenesis.
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Li Z, Ni C, Chen L, Sun Z, Yang C, Zhao X, Wang Y. Kyphoplasty versus vertebroplasty for the treatment of malignant vertebral compression fractures caused by metastases: a retrospective study. Chin Med J (Engl) 2014; 127:1493-1496. [PMID: 24762595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023] Open
Abstract
BACKGROUND There are few comparative studies regarding kyphoplasty (KP) and vertebroplasty (VP) for the treatment of painful vertebral compression fractures (VCF) in patients with cancer. The purpose of this study is to retrospectively compare KP with VP in pain improvement, cement leakage incidence, and the cost of treatment of malignant VCF. METHODS We performed a retrospective study of clinical data for 80 patients with multiple spinal metastases, treated with KP in 42 cases and VP in 38. Visual analog scale (VAS) scores were collected pre-operatively, post-operatively, at 1 month, 6 months, and 1 year after treatment. Cement leakage was identified using fluoroscopy and CT scan. Total cost per patient was also collected. RESULTS There was a significant difference between the pre- and post-operative VAS scores (7.4 ± 2.0 to 3.8 ± 1.6, P < 0.001 in the KP group; 6.7 ± 2.4 to 3.7 ± 1.4, P < 0.001 in the VP group), and was maintained at 1-year follow-up (3.2 ± 1.4 in the KP group, 3.1 ± 1.3 in the VP group). However, the difference in VAS score between these two groups was insignificant at baseline and every follow-up assessment post-operatively (P > 0.05). The incidence of cement leakage in the KP group was lower than that of the VP group (16.9% (14/83) vs 30.3% (23/76), P < 0.05). However, none of the patients developed any symptoms. The length of postoperative hospital stay in the VP group was shorter than that of the KP group ((2.4 ± 1.3) vs (5.3 ± 1.9) days, P < 0.05). Total hospital cost in the KP group was much higher than that of the VP group (RMB Yuan 8 492 ± 3 332 vs RMB Yuan 3 173 ± 1 341, P < 0.01). CONCLUSIONS VP and KP are both effective in providing pain relief for patients with cancer-related VCF. KP provides no greater degree of pain improvement. KP is associated with a lower rate of cement leakage compared with VP. VP is associated with lower cost and shorter postoperative hospital stay in China.
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Ni C, Li Z, Jin Y, Fan B, Yang C. Balloon-assisted catheter-directed thrombolysis for acute lower extremity deep vein thrombosis. J Vasc Interv Radiol 2013. [DOI: 10.1016/j.jvir.2013.01.190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Ni C, Xu YY, Zhou SH, Wang SQ. Differential diagnosis of inflammatory myofibroblastic tumour and low-grade myofibroblastic sarcoma: two case reports with a literature review. J Int Med Res 2011; 39:311-20. [PMID: 21672335 DOI: 10.1177/147323001103900134] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Inflammatory myofibroblastic tumour (IMT) and low-grade myofibroblastic sarcoma (LGMS) have similar morpho logical and immunophenotypic features, but LGMS is more malignant than IMT and the treatment requires a wider surgical margin plus post-operative chemotherapy or radiotherapy. To date, only 28 cases of IMT and two cases of LGMS have been reported in the laryngopharynx. Recent studies have suggested that anaplastic lymphoma kinase (ALK) and cytokeratin are important markers for differentiating between the two tumours. Here, two cases involving different myofibroblastic tumours of the larynx are reported. Based on the histological and immunohistochemical results, case 1 was diagnosed as IMT involving the right arytenoepiglottic fold, while case 2 was diagnosed as LGMS involving the epiglottic-glossal surface. There was no recurrence or metastasis in either case after post-operative follow-up (12 and 14 months, respectively). It is difficult to distinguish IMT from LGMS; both morphological and immunohistological analyses are required.
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Ali B, Shah LR, Ni C, Xiao JQ, Shah SI. Interplay of dopant, defects and electronic structure in driving ferromagnetism in Co-doped oxides: TiO(2), CeO(2) and ZnO. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:456005. [PMID: 21694025 DOI: 10.1088/0953-8984/21/45/456005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A comprehensive study of the defects and impurity (Co)-driven ferromagnetism is undertaken in the oxide semiconductors: TiO(2), ZnO and CeO(2). The effect of magnetic (Co(2+)) and non-magnetic (Cu(2+)) impurities in conjunction with defects, such as oxygen vacancies (V(o)), have been thoroughly investigated. Analyses of the x-ray diffraction (XRD) and x-ray photoelectron spectroscopy (XPS) data reveal the incorporation of cobalt in the lattice, with no signature of cobalt segregation. It is shown that oxygen vacancies are necessary for the ferromagnetic coupling in the Co-doped oxides mentioned above. The possible exchange mechanisms responsible for the ferromagnetism are discussed in light of the energy levels of dopants in the host oxides. In addition, Co and Cu co-doped TiO(2) samples are studied in order to understand the role of point defects in establishing room temperature ferromagnetism. The parameters calculated from the bound magnetic polaron (BMP) and Jorgensen's optical electronegativity models offer a satisfactory explanation of the defect-driven ferromagnetism in the doped/co-doped samples.
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Wang W, Zhao H, Zhang S, Kang E, Chen Y, Ni C, Zhang S, Zhu M. Patterns of expression and function of the p75(NGFR) protein in pancreatic cancer cells and tumours. Eur J Surg Oncol 2008; 35:826-32. [PMID: 19041213 DOI: 10.1016/j.ejso.2008.10.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Revised: 10/21/2008] [Accepted: 10/23/2008] [Indexed: 02/06/2023] Open
Abstract
BACKGROUNDS/AIMS Pancreatic carcinoma is one of the most aggressive human malignancies. The aggressive and highly metastatic behaviour of pancreatic carcinoma may partly be attributable to the autocrine and/or paracrine interactions involving altered expression of neurotrophin growth factors and their corresponding receptors. The aim of the present study is to investigate the expression pattern and function of the p75(NGFR) protein in pancreatic cancer cell lines and tumours to explain the phenomenon of perineural invasion in pancreatic cancer. METHODS The expression of p75(NGFR) in 137 pancreatic adenocarcinoma samples and the corresponding adjacent pancreatic samples was examined immunohistochemically using the EnVision Plus System. Then we examined the in vitro chemotaxis behaviour of cancer cells transfected with p75(NGFR) plasmid to nerve growth factor (NGF). RESULTS Immunostaining for p75(NGFR) was weak or absent in both normal pancreata and pancreatic carcinoma tissues; however, the immunostaining was relatively weaker in the pancreatic carcinoma tissues than in the normal pancreata. It is interesting to note that p75(NGFR) expression in the cancer tissues was positively correlated with the degree of perineural invasion (chi(2)=32.94, P<0.01). The chemotaxis ability of the p75(NGFR)-transfected pancreatic cancer cells to NGF was significantly stronger than that of the non-transfected or vacant vector transfected cells (P<0.01). CONCLUSIONS Our findings indicate that p75(NGFR) expression may be involved in the perineural invasion of pancreatic cancer cells, and the mechanism might be through mediating the chemoattraction of cancer cells for neural tissues.
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Ahmad A, Buzby S, Ni C, Ismat Shah S. Effect of Nb and Sc doping on the phase transformation of sol-gel processed TiO2 nanoparticles. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2008; 8:2410-2418. [PMID: 18572656 DOI: 10.1166/jnn.2008.239] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Nb and Sc doped TiO2 nanoparticles were synthesized via sol-gel technique. Dopant concentration of each element was varied from 0.5 to 1.5 atomic%. The effect of metal ion doping and calcination temperatures on anatase to rutile phase transformation has been investigated. Samples were analyzed by various analytical methods such as X-ray diffraction (XRD), Transmission Electron Microscope (TEM), X-ray Photoelectron Spectroscopy (XPS) and Energy Dispersive X-ray Spectroscopy (EDS). XRD analyses showed that Nb and Sc doped samples calcined at 300 degrees C and 350 degrees C, respectively, were crystalline and had an anatase structure. Results showed that anatase was stable up to 700 degrees C annealing temperature for samples doped with 0.5 atomic% Nb. There was a sharp transition from anatase to rutile phase above 700 degrees C and complete rutile structure was obtained at 750 degrees C. However, the transformation from anatase to rutile was not so sharp in samples doped with 1.0 atomic% and 1.5 atomic% Nb. Results indicated that higher concentration of Nb helps to stabilize the anatase phase. For samples doped with 0.5 atomic% Sc, anatase phase is stable up to 650 degrees C. Transformation from anatase to rutile starts at temperature above 650 degrees C and 100% rutile phase was obtained at 800 degrees C while for samples doped with 1.0 atomic% and 1.5 atomic% Sc, the complete transformation from anatase to rutile takes place at an even higher temperature. Results indicate that increasing the calcination time from 0.5 to 2.0 hours at 500 degrees C does not affect the stability of anatase phase. However, TEM and XRD data showed that the increase in the annealing time leads to an increase in particles size. The rutile to anatase concentration ratio increased with temperature above the phase transformation temperature. The activation energy for the phase transformation from anatase to rutile for doped and undoped samples was also measured. There was a general rise in the activation energy with increasing dopant concentration.
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