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Objective@#To detect the expression of nuclear transcription factor OCT-4 in laryngeal squamous cell carcinoma (LSCC) and its relationship with CD44, and to explore the relationship between OCT-4 and the cancer stem cells and its significance in tumors.@*Methods@#Sixty-nine specimens of laryngeal surgical resection were selected from LSCC patients from January 2008 to December 2012 in Lanzhou General Hospital of Lanzhou Military Region. Another 18 cases of normal laryngeal mucosa tissues were selected as control. OCT-4, CD44 and OCT-4+ CD44+ cells were observed by using tissue microarray, immunohistochemistry staining and immunohistochemical double staining techniques, and the relationship between their pathological features, such as expression intensity, distribution, cell morphology and clinical parameters were analyzed to explore the clinicopathological significance of CD44+ OCT-4+ cells.@*Results@#The percentage of CD44-positive cells in LSCC was significantly higher than that in normal laryngeal mucosa tissues [(63.62±8.76)% vs. (13.61±5.81)%, P < 0.001]. The percentage of OCT-4-positive cells in LSCC was (50.44±10.84)%, while it was not expressed in normal laryngeal mucosa tissues (P < 0.001). In LSCC, the expression of OCT-4 was significantly lower than that of CD44 (P < 0.001); the coexpression rate of these two molecules was (5.07±2.90)%. The percentage of CD44-positive cells in poorly differentiated LSCC was significantly higher than that in the well-differentiated group [62.78% (8.22%) vs. 28.62% (30.45%), P < 0.05]. The percentage of OCT-4-positive cells in poorly differentiated LSCC was significantly higher than that in the well-differentiated group [49.89% (13.12%) vs. 33.00% (20.00%), P < 0.05]. In the cancer stem cells, the percentage of OCT-4+ CD44+ cells in poorly differentiated carcinoma group was also significantly higher than that in the well-differentiated carcinoma group (P < 0.01), the lower the degree of differentiation, the higher the expression level of OCT-4. In LSCC poorly differentiated group, the expressions of OCT-4 and CD44 showed no significant difference between different T stages, but the percentage of OCT-4+ CD44+ cells elevated with T stage increasing (P < 0.05). The expression of OCT-4 in patients with lymph node metastasis was significantly higher than that in patients without lymph node metastasis (P < 0.01).@*Conclusions@#The expressions of OCT-4 and CD44 are associated with the malignant biological behaviors of LSCC closely. OCT-4 may be a valuable marker of tumor stem cells of LSCC.
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[Objective] The paper tries to find out the ways and methods for cultivating medical students ’ humanistic quality. [Methods]By doing questionnaire survey among students who major in clinical medicine, Chinese medicine, science of acupuncture, rehabilitation, au-diological medicine, medical images, pharmacy and so on to analyse the present situation of medical students ’ humanities in Zhejiang Chinese Medical University, then to demonstrate that strengthening the education of the humanistic quality is necessary to the success of the medical students. [Results] Survey results show that the medical students are satisfied about the education of the humanistic quality scheduled by the Zhejiang Chinese Medical University, but there are still problems in the concepts, systems, measures, and so on. In face of these problems, the paper puts forward some strategies, such as changing concepts and ideas, establishing the modern medical educa-tion, based on the first class, developing the second classroom, to let the medical humanistic spirit throughout the physical teaching and the practice teaching.[Conclusions]The ways and methods from the paper are practical and feasible. The importance and necessity of them are obvious.
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This study examined the effects of ursolic acid (UA) on the proliferation and apoptosis of a human ovarian cancer cell line, CAOV3. The CAOV3 cells were cultured in the RPMI 1640 media and treated with different concentrations of UA (0, 10, 20, 40 mumol/L). The proliferation rate of the CAOV3 cells was determined by MTT assay. The apoptosis rate was measured by flow cytometry. ERK activity was detected by immunoprecipitation and the expressions of p-ERK1/2, MKP-1, Bax and Bcl-2 by Western blotting. The results showed that the proliferation rate was significantly decreased in the cells treated with UA as compared with that in the non-treated cells (P<0.05). The intracellular ERK activity and p-ERK1/2 expression were also reduced in the UA-treated cells, while the MKP-1 expression was elevated. Moreover, the apoptosis was found in the CAOV3 cells exposed to UA; the Bax expression was increased and the Bcl-2 expression decreased. The apoptosis rate in the UA-treated cells was much higher than that in the non-treated cells (P<0.05). It is concluded that UA can inhibit the proliferation of CAOV3 cells by suppressing the ERK activity and the expression of p-ERK1/2. And it can also induce the apoptosis of the CAOV3 cells by up-regulating the Bax expression and down-regulating the Bcl-2 expression.
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Objective To study the influence of pine-seed oil on lipid metabolism-related gene expression. Method The mice were fed by basic food,high fat food (80% basic food added 20% lard, HF) and HF added pine-seed oil (80% high fat food added 20% pine-seed oil, SHF). At 45 d and 90 d, the ACS mRNA, FATP mRNA, HSL mRNA and PPAR mRNA of adipose tissue were measured respectively by RT-PCR. Results At 45 d, compared with the basic group, ACS mRNA, FATP mRNA, HSL mRNA and PPAR-? mRNA expression level in SHF group increased by 24.2%, 8.8%, 10.9%, 21.6% respectively,and at 90 d,increased by 19.6%, 25.7%, 60.1%, 13.1% respectirely. Compared with the basic group,ACS mRNA, FATP mRNA, HSL mRNA and PPAR-? mRNA expression level in HF group increased by 27.9%, 41.7%, 51.1%, 23.9% respectively. Conclusion Pine-seed oil is significantly effective in regulation of lipid metabolism.
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<p><b>OBJECTIVE</b>To study the effects of an alpha(1)-adrenoceptor antagonist, terazosin on the androgen-independent prostate cancer cell lines PC-3 and DU145.</p><p><b>METHODS</b>Two androgen independent cell lines, PC-3 and DU145, were used to determine cell viability, colony-forming ability, as well as cell cycle distribution, after exposure to terazosin. Western blot analysis was used to determine the expression of p21WAF1 and p27KIP1.</p><p><b>RESULTS</b>This study shows that terazosin inhibits not only prostate cancer cell growth but also its colony forming ability, both of which are main targets of clinical treatment. In addition, terazosin is shown to inhibit cell growth through G1 phase cell cycle arrest and the up-regulation of p27(KIP1).</p><p><b>CONCLUSION</b>This study provides evidence that the alpha(1)-adrenoceptor antagonist terazosin may have therapeutic potential in the treatment of advanced hormone refractory prostate cancer.</p>
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Humans , Male , Adrenergic alpha-Antagonists , Pharmacology , Antineoplastic Agents , Pharmacology , Cell Division , Cell Line , Prazosin , Pharmacology , Prostatic Neoplasms , Pathology , Tumor Cells, CulturedABSTRACT
Objective:To investigate if downregulation of two mitotic checkpoint proteins, MAD2 and p55CDC, is a frequent event in human prostate cancer and whether decreased expression of these two proteins are associated with progression of prostate cancer. Methods: Using immunohistochemistry technique, the expressions of MAD2 and p55CDC proteins are examined in 46 benign prostate hyperplasia (BPH) and 65 prostate cancer tissues. Differential expressions were compared first between BPH and prostate cancer specimens, and then among prostate cancer samples with different Gleason grades. Results: We found that down regulation of MAD2 and p55CDC expressions was significant in prostate cancer (96% and 83%, respectively) compared to BPH (19.5% and 4.3%, respectively) ( P
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OBJECTIVE:To determine the concentration of Dermatan Sulfate,a new antithrombotic medicine in blood or urine by spectrophotometry.METHODS:In Britton Robinson buffer solution(pH=5.8),color fading reaction occurred when Dermatan sulfate combined with neutral red dye to form ionic associate.The reduction of absorbance of the system was positively correlated to dermatan sulfate concentration,with the maximum absorption wavelength at 526 nm.RESULTS:The linear range of dermatan sulfate was 0.18～4.0?g?mL~(-1)(r=0.999 1) with a detection limit of 0.054?g?m~(-1).The average recovery was 100.3%(RSD=1.2%),with RSD of dermatan sulfate at low,medium,and high concentrations at 2.9%, 1.5%,and 1.1%,respectively.The coexisting substances did no interference on the determination results.CONCLUSION: The method is simple,accurate,and sensitive with good methodological selectivity and it achieved satisfactory results in the determination of dermatan sulfate in blood or urine.
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AIM: To explore the effects of 5-HT and electrolytes on the airway remodeling in guinea pigs with bronchial asthma.METHODS: 70 guinea pigs were divided into 7 groups: control group,model group,continued model group,5-HT group,anti-5-HT group,high Mg~(2+) group,low Mg~(2+) group.Remodeling model was established with ovalbumin.RESULTS: ① In model group,5-HT of serum and thickness of airway walls were significantly increased compared with control group(P
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the normal control group (Pthe continued asthma model group (P