Proteomic Profiling of Serum from Stage I Lung Squamous Cell Carcinoma Patients

Li, Xin-Ju,Wu, Qi-Fei,He, Da-Lin,Fu, Jun-Ke,Jin, Xin Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.4

Objectives: This study employed proteomic profiling to identify specific tumor markers that might improve early diagnosis of lung squamous cell carcinoma. Methods: Serum samples were isolated from 30 patients with stage I lung squamous cell carcinoma and 30 age-and gender-matched healthy controls, and proteomic profiles were obtained by matrix-assisted laser desorption ionization time of flight mass spectrometry. Results: Three highly expressed potential tumor markers were identified in the sera of stage I lung squamous cell carcinoma patients, with molecular weights of 3261.69, 3192.07, and 2556.92 Da. One protein peak with molecular weight 3261.69 Da was chosen as the candidate biomarker and identified as a fibrinogen alpha chain through a search of the IPI, NCBI or SWISS-PROT protein databases. Conclusion: As a potential tumor biomarker, fibrinogen alpha chain may be applicable for the early diagnosis and prognosis of lung squamous cell carcinoma patients.

Sprague Dawley 흰쥐에서 테스토스테론에 의하여 유발된 전립선 비대증에 미치는 산수유 추출물의 영향

권다혜(Da He Kwon),황보현(Hyun Hwangbo),최은옥(Eun Ok Choi),김민영(Min Yeong Kim),지선영(Seon Yeong Ji),김경일(Kyung-Il Kim),박노진(No-Jin Park),김성옥(Sung Ok Kim),홍수현(Su-Hyun Hong),박철(Cheo Park),황혜진(Hye-Jin Hwang),정지숙(Ji-S 한국생명과학회 2018 생명과학회지 Vol.28 No.12

노년기 비뇨기 계통에 가장 흔한 증상의 하나인 전립선 비대증은 요도를 둘러싼 전립선의 주위의 평활근과 상피세포의 과다 증식에 의한 것이다. 산수유는 강력한 항산화 효과로 인하여 다양한 질병의 예방 및 치료에 효과적이라고 보고되었지만 전립선 비대증에 대한 효능은 아직 알려지지 않았다. 본 연구에서는 산수유 열수 추출물이 testosterone에 의하여 유도되는 전립선 비대증에 미치는 영향을 조사하였다. 실험동물 내재성 testosterone의 영향을 배제하기 위해 거세를 하였으며, 전립선 비대증을 유도하기 위해, testosterone propionate (TP)를 피하 주사하였다. 산수유 추출물은 TP 주입과 함께 매일 경구 투여하였고, 5α-reductase type 2의 선택적 억제제인 finasteride를 양성 대조군으로 사용하였다. 본 연구의 결과에 의하면, 산수유 추출물 투여군에서는 finasteride 처리군에서와 마찬가지로 혈청 내 dihydrotestosterone 농도가 억제되었으며 전립선 무게 증가와 조직병리학적 변화가 유의하게 감소되었다. 산수유 추출물은 또한 전립선 조직 및 혈청에서 각각 TP에 의해 증가된 5α-reductase type2의 발현 및 농도를 유의적으로 억제하였다. 아울러 산수유 추출물은 TP에 의하여 유도된 AR, AR의 co-activator 및 세포증식 마커 단백질들의 발현 증가뿐 만 아니라 prostate-specific antigen의 수치와 발현도 감소시켰다. 결론적으로 산수유 추출물은 전립선 비대억제를 위한 식의약 소재로서의 개발 가능성이 매우 높음을 의미한다. Benign prostatic hyperplasia (BPH) is characterized by prostatic hypertrophy mainly in the elderly. Corni Fructus is reportedly effective in the prevention and treatment of various diseases, but its efficacy on BPH has not been previously studied. In the present study, we investigated whether or not a Corni Fructus water extract (CF) could prevent testosterone-induced prostatic hyperplasia in rats. To induce BPH, castrated rats were subcutaneously injected with testosterone propionate (TP). CF was administered daily by oral gavage, along with the TP injections, and finasteride, a selective inhibitor of 5α-reductase type 2, was used as a positive control. The results show that CF significantly reduces prostate weight and histopathologic changes while also decreasing levels of serum dihydrotestosterone, similar to the finasteride-treated group. CF also suppresses TP-induced 5α-reductase expression and concentration in prostate tissue and serum, respectively. Furthermore, CF markedly inhibited TPinduced expression of the androgen receptor (AR) and the steroid receptor coactivator 1, an AR coactivator, which was associated with a decrease in prostate-specific antigen levels in both serum and prostate tissue. In conclusion, the results of this study indicate that CF weakens BPH status by inactivation of 5α-reductase and AR.

Roles of Immunohistochemical Staining in Diagnosing Pulmonary Squamous Cell Carcinoma

Yan, Yue,Zhang, Ya-Xiong,Fang, Wen-Feng,Kang, Shi-Yang,Zhan, Jian-Hua,Chen, Nan,Hong, Shao-Dong,Liang, Wen-Hua,Tang, Yan-Na,He, Da-Cheng,Wu, Xuan,Zhang, Li Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.2

Background: Differentiating morphologic features based on hematoxylin-eosin (HE) staining is the most common method to classify pathological subtypes of non-small-cell lung cancer (NSCLC). However, its accuracy and inter-observer reproducibility in pathological diagnosis of poorly differentiated NSCLC remained to be improved. Materials and Methods: We attempted to explore the role of immunohistochemistry (IHC) staining in diagnosing pulmonary squamous cell carcinoma (SQCC) with poorly differentiated features by HE staining or with elevated serum adenocarcinoma-specific tumor markers (AD-TMs). We also compared the difference of epidermal growth factor receptor (EGFR) mutation rate between patients with confirmed SQCC and those with revised pathological subtype. Logistic regression analyses were used to test the association between different factors and diagnostic accuracy. Results: A total of 132 patients who met the eligible criteria and had adequate specimens for IHC confirmation were included. Pathological revised cases in poor differentiated subgroup, biopsy samples and high-level AD-TMs cases were more than those with high/moderate differentiation, surgical specimens and normal-level AD-TMs. Moreover, biopsy sample was a significant factor decreasing diagnostic accuracy of pathological subtype (OR, 4.037; 95% CI 1.446-11.267, p=0.008). Additionally, EGFR mutation rate was higher in patients with pathological diagnostic changes than those with confirmed SQCC (16.7% vs 4.4%, p=0.157). Conclusions: Diagnosis based on HE staining only might cause pathological misinterpretation in NSCLC patients with poor differentiation or high-level AD-TMs, especially those with biopsy samples. HE staining and IHC should be combined as pathological diagnostic standard. The occurrence of EGFR mutations in pulmonary SQCC might be overestimated.

Lasiokaurin derivatives: synthesis, antimicrobial and antitumor biological evaluation, and apoptosis-inducing effects

Da-Hong Li,Ping Hu,Sheng-tao Xu,Chun-yan Fang,Shuang Tang,Xin-yu Wang,Xing-yan Sun,He Lian,Ying Xu,Xiao-ke Gu,Jin-yi Xu 대한약학회 2017 Archives of Pharmacal Research Vol.40 No.7

Herein, a series of lasiokaurin derivatives were designed and synthesized. All the derivatives together with lasiokaurin and oridonin were tested for their antimicrobial and antiproliferative activity. Compound 16 showed the most promising antimicrobial activity with MICs of 2.0 and 1.0 lg/mL against Gram-Positive bacteria S. aureus and B. subtilis, respectively. All the synthetic lasiokaurin derivatives showed better antiproliferative activity than parent compound lasiokaurin 1. Compound 10 exhibited the strongest cytotoxicity with IC50 values of 0.47 and 0.20 lM against MGC-803 and CaEs-17 cells, accordingly. Moreover, it was shown to have potent antitumor activity in vivo in a murine model of MGC-803 gastric cancer. Preliminary SARs were also concluded based on obtained data. The apoptosis-inducing effects of 10 were further investigated using CaEs-17 cells. The results showed that lasiokaurin derivative 10 could induce apoptosis via mitochondria related pathway and arrest CaEs-17 cell cycle at S phase. Compound 10 could also affect apoptosisrelated proteins that was up-regulation of CDK2 and downregulation of ATM and cyclin A1.

The Effects of Maglev Chopper’s Control Cycle on Suspension Performance in EMS System

Da Liang,Kunlun Zhang,Qilong Jiang,Hongyun He 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5

The cascade control strategy of current inner loop and airgap outer loop is usually adopted in electromagnetic suspension (EMS) system. The current loop and airgap loop adopt different control cycles in controller design, and the current loop control cycle is required to be shorter than the airgap loop control cycle. In theory, the shorter the control cycle of the inner loop, the better the following effect of the chopper current, and the more beneficial to the suspension system. However, it also needs the higher controller performance and control algorithm efficiency. With the suspension control performance permitted, reducing the current loop control frequency can effectively reduce the requirements of the controller performance and expand the selection range of the controller. In order to determine the appropriate control period of the current loop in the digital suspension system, the mathematical model of the suspension system and the maglev chopper is established, then the quantitative relationship between the current loop control period and the coil current ripple is deduced. Based on Simulink, the coupling simulation model of the maglev chopper and the suspension system is established, where the influence of the chopper control period on the performance of the suspension system is simulated and analyzed.

Bioaugmentation Treatment of Mature Landfill Leachate by New Isolated Ammonia Nitrogen and Humic Acid Resistant Microorganism

( Da Hai Yu ),( Ji Yu Yang ),( Fei Teng ),( Li Li Feng ),( Xue Xun Fang ),( He Jun Ren ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.7

The mature landfill leachate, which is characterized by a high concentration of ammonia nitrogen (NH3-N) and humic acid (HA), poses a challenge to biotreatment methods, due to the constituent toxicity and low biodegradable fraction of the organics. In this study, we applied bioaugmentation technology in landfill leachate degradation by introducing a domesticated NH3-N and HA resistant bacteria strain, which was identified as Bacillus cereus (abbreviated as B. cereus Jlu) and Enterococcus casseliflavus (abbreviated as E. casseliflavus Jlu), respectively. The isolated strains exhibited excellent tolerant ability for NH3-N and HA and they could also greatly improved the COD (chemical oxygen demand), NH3-N and HA removal rate, and efficiency of bioaugmentation degradation of landfill leachate. Only 3 days was required for the domesticated bacteria to remove about 70.0% COD, compared with 9 days`` degradation for the undomesticated (autochthonous) bacteria to obtain a similar removal rate. An orthogonal array was then used to further improve the COD and NH3-N removal rate. Under the optimum condition, the COD removal rate in leachate by using E. casseliflavus Jlu and B. cereus Jlu increased to 86.0% and 90.0%, respectively after, 2 days of degradation. The simultaneous removal of NH3-N and HA with more than 50% and 40% removal rate in leachate by employing the sole screened strain was first observed.

Single Nucleotide Polymorphisms of the GnRHR Gene Associated with Reproductive Traits of Japanese Flounder (Paralichthys olivaceus)

He, Feng,Wen, Hai-Shen,Li, Ji-Fang,Yu, Da-Hui,Ma, Rui-Qin,Shi, Dan,Mu, Wei-Jie,Zhang, Yuan-Qing,Hu, Jian,Liu, Miao,Han, Wei-Guo,Zhang, Jia-Nan,Wang, Qing-Qing,Yuan, Yu-Ren,Liu, Qun Asian Australasian Association of Animal Productio 2011 Animal Bioscience Vol.24 No.4

Gonadotropin-releasing hormone receptor (GnRHR) gene is expressed at the anterior pituitary gland and plays a key role in gonad development. This study aimed to investigate molecular genetic characteristics of the GnRHR gene and elucidate the effects of single nucleotide polymorphisms (SNPs) of GnRHR gene on sex steroid level in Japanese flounder (Paralichthys olivaceus). We used polymerase chain reaction single-strand conformation polymorphism (PCR-SSCP) and sequencing of the GnRHR gene in 75 individuals. We identified three SNPs in the GnRHR gene: P1 locus (C759A and C830T) in the coding region of exon2 which were both linked together and P2 locus (G984T) in the coding region of exon3, which added a new transcript factor (ADR1) and a new methylation site (CG). Only C830T of P1 leads to amino acid changes Thr266Ile. Statistical analysis showed that P1 was significantly associated with $17{\beta}$-estradiol ($E_2$) level (p<0.01) and gonadosomatic index (GSI) (p<0.05). Individuals with genotype BB of P1 had significantly higher serum $E_2$ levels (p<0.01) and GSI (p<0.05) than those of genotype AA or AB. Another SNP, P2, synonymous mutation, was significantly associated with GSI (p<0.05). Individuals with genotype AB of P2 had significantly higher GSI (p<0.05) than that of genotype AA. In addition, there was a significant association between one diplotype based on three SNPs and reproductive traits. The genetic effects for both serum $E_2$ level and GSI of diplotype D4 were super diplotypes (p<0.05). These results suggest that the SNPs in Japanese Flounder GnRHR are associated with $E_2$ level and GSI.

Prognostic Significance of Overexpression of EZH2 and H3k27me3 Proteins in Gastric Cancer

He, Long-Jun,Cai, Mu-Yan,Xu, Guo-Liang,Li, Jian-Jun,Weng, Zi-Jin,Xu, Da-Zhi,Luo, Guang-Yu,Zhu, Sen-Lin,Xie, Dan Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.7

The enhancer of zeste homolog 2 (EZH2) methyl transferase and histone 3 lysine 27 (H3K27me3) protein can repress gene transcription, and their aberrant expression has been observed in various human cancers. This study determined their expression levels in gastric cancer tissues with reference to clinicopathological features and patient survival. We collected 117 gastric cancer and corresponding normal tissues for immunohistochemistry analysis. In gastric cancers, 82/117 (70.1%) were positive for EZH2 and 66/117 (56.4%) for H3K27me3 proteins in contrast to only 5.41% and 7.25% of normal gastric mucosa specimens, respectively. Kaplan-Meier survival data showed the average overall and disease-free survival of EZH2 high expression patients was 25.2 and 20.2 months, respectively, shorter than that with EZH2 low expression (40.5 and 35.9 months). The average overall survival and disease-free survival of high H3K27me3 expression patients was 23.4 and 17.4 months, shorter than without H3K27me3 expression (37.6 and 34.5 months). The average overall survival and disease-free survival of patients with both EZH2 and H3K27me3 expression was 18.8 and 12.9 months, respectively, shorter than that with either alone (34.7 and 31.2 months) or with low levels of both (43.9 and 39.9 months). Multivariate Cox regression analysis showed that H3K27me3 and EZH2 expression, tumor size differentiation and clinical stage were all independent prognostic factors for predicting patient survival. This study demonstrated that detection of both EZH2 and H3K27me3 proteins can predict poor survival of gastric cancer patients, superior to single protein detection. In addition, H3K27me3 and EZH2 protein expression could predict lymph node metastasis.

Gold Immunolocalization of Rubisco and Rubisco Activase in Pyrenoid of Chlamydomonas reinhardtii

He, Pei-Min,Zhang, Da-Bing,Chen, Geng-Yun,Liu, Qi-Gen,Wu, Wei-Ning The Korean Society of Phycology 2003 ALGAE Vol.18 No.2

The pyrenoid ultrastructure and distribution of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and Rubisco activase in the chloroplasts of Chlamydomonas reinhardtii was studied using the immunogold localization technology with electron microscopy. There were several tubular thylakoids invading in the pyrenoid matrix to form several spokewise channels. The connections between pyrenoid matrix and stroma of chloroplast were the partial of channels. The starch sheath surrounding the pyrenoid was separated into several parts by the connections in transection. Some thylakoids were packed together near the connections in one side of the pyrenoid. Those special structures might be used to transport substance between pyrenoid and stroma of chloroplasts. With the antibody raised against the large subunits of Rubsico from C. protothecoides, the result of the gold immunolocalization of Rubisco in Chlamydomonas reinhardtii showed most of the gold particles heavily labeled the pyrenoid matrix, as well as the starch sheath matrix, and very few in the stroma of chloroplasts. The gold particle density was 880.00 $\pm$ 164.32, 190.00 $\pm$ 152.39 and 9.60 $\pm$ 5.37 ${\mu}m^{-2}$ in pyrenoid matrix, starch sheath and stroma region of chloroplast respectively (background: 5.67 $\pm$ 1.53 ${\mu}m^{-2}$). 99.59% of the total Rubiscos was calculated to be concentrated in the pyrenoid matrix and starch sheath by spatial densities. The gold immunolocalization of Rubisco activase also showed that Rubisco activase was mainly concentrated in the periphery of the pyrenoid and the starch sheath (the density was as high as 229.69 $\pm$ 96.96 ${\mu}m^{-2}$). There were very few gold particles located in the stroma of chloroplasts. These results indicated that pyrenoid surface and starch sheath was the site for Rubisco activation and $CO_2$ fixation, which supported the suggestion that pyrenoids perform photosynthesis function.

The Application of Non-phosphorous AEC Program in Cooling Water Systems of Petrochemical Industry

( Da Gang Li ),( Mi Ke Hong ),( Gao Rong He ) 한국부식방식학회(구 한국부식학회) 2008 Corrosion Science and Technology Vol.7 No.1