Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 16 de 16
Filter
1.
Article in English | WPRIM | ID: wpr-811199

ABSTRACT

PURPOSE: C-terminal binding protein 1 (CtBP1) is a transcriptional co-repressor that is overexpressed in many cancers. CtBP1 transcriptionally represses a broad array of tumor suppressors, which promotes cancer cell proliferation, migration, invasion, and resistance to apoptosis. Recent studies have demonstrated that CtBP1 is a potential target for cancer therapy. This study was designed to screen for compounds that potentially target CtBP1.METHODS: Using a structure-based virtual screening for CtBP1 inhibitors, we found protocatechuic aldehyde (PA), a natural compound found in the root of a traditional Chinese herb, Salvia miltiorrhiza, that directly binds to CtBP1. Microscale thermophoresis assay was performed to determine whether PA and CtBP1 directly bind to each other. Further, clustered regularly interspaced short palindromic repeats associated Cas9 nuclease-mediated CtBP1 knockout in breast cancer cells was used to validate the CtBP1 targeting specificity of PA.RESULTS: Functional studies showed that PA repressed the proliferation and migration of breast cancer cells. Furthermore, PA elevated the expression of the downstream targets of CtBP1, p21 and E-cadherin, and decreased CtBP1 binding affinity for the promoter regions of p21 and E-cadherin in breast cancer cells. However, PA did not affect the expression of p21 and E-cadherin in the CtBP1 knockout breast cancer cells. In addition, the CtBP1 knockout breast cancer cells showed resistance to PA-induced repression of proliferation and migration.CONCLUSION: Our findings demonstrated that PA directly bound to CtBP1 and inhibited the growth and migration of breast cancer cells through CtBP1 inhibition. Structural modifications of PA are further required to enhance its binding affinity and selectivity for CtBP1.


Subject(s)
Apoptosis , Asians , Breast Neoplasms , Breast , Cadherins , Carrier Proteins , Cell Proliferation , Clustered Regularly Interspaced Short Palindromic Repeats , Humans , Mass Screening , Promoter Regions, Genetic , Repression, Psychology , Salvia miltiorrhiza , Sensitivity and Specificity
2.
Acta Pharmaceutica Sinica B ; (6): 1239-1248, 2020.
Article in English | WPRIM | ID: wpr-828850

ABSTRACT

A highly effective medicine is urgently required to cure coronavirus disease 2019 (COVID-19). For the purpose, we developed a molecular docking based webserver, namely D3Targets-2019-nCoV, with two functions, one is for predicting drug targets for drugs or active compounds observed from clinic or / studies, the other is for identifying lead compounds against potential drug targets docking. This server has its unique features, (1) the potential target proteins and their different conformations involving in the whole process from virus infection to replication and release were included as many as possible; (2) all the potential ligand-binding sites with volume larger than 200 Å on a protein structure were identified for docking; (3) correlation information among some conformations or binding sites was annotated; (4) it is easy to be updated, and is accessible freely to public (https://www.d3pharma.com/D3Targets-2019-nCoV/index.php). Currently, the webserver contains 42 proteins [20 severe acute respiratory syndrome-related coronavirus 2 (SARS-CoV-2) encoded proteins and 22 human proteins involved in virus infection, replication and release] with 69 different conformations/structures and 557 potential ligand-binding pockets in total. With 6 examples, we demonstrated that the webserver should be useful to medicinal chemists, pharmacologists and clinicians for efficiently discovering or developing effective drugs against the SARS-CoV-2 to cure COVID-19.

3.
Article in Chinese | WPRIM | ID: wpr-805296

ABSTRACT

Objective@#To determine the screening and early detection reference age for individuals with family history of cancer in either one of the parents.@*Methods@#We examined the family history of 33 200 subjects who visited the Department of Cancer Prevention, National Cancer Center and Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College between January 2008 and March 2018 for cancer screening and early detection. The age differences between the subjects in the research population were analyzed using an independent t-test. All statistical analysis was performed using IBM SPSS Statistics for Windows version 24.0 (IBM Corp., Armonk, NY, USA).@*Results@#We documented 480 families in which fathers and one or more of their children were diagnosed with malignancies, attributing to 614 father-child pairs. We also documented 476 families with mothers and one or more of their children diagnosed with malignancies, attributing to 614 mother-child pairs. In total, we included 956 families in our study with a total of 505 sons and 723 daughters diagnosed with cancer during the study period. In the father-child group the average age at diagnosis for fathers, sons, and daughters were 66.6±10.8, 56.6±11.7, and 51.7±11.7 years, respectively. Sons and daughters were diagnosed with malignancy 10.0 and 14.9 years earlier than their fathers, respectively (P<0.001). Daughters developed malignancies approximately 5 years earlier than sons in the father-child group (P<0.001). In the mother-child group, the average age at diagnosis for mothers, sons, and daughters were 65.8±12.2, 57.8±12.2, and 52.3±12.4 years, respectively. Mothers were diagnosed with malignant disease 8 years later than their sons (P<0.001) and 13.5 years later than their daughters (P<0.001). Interestingly, daughters developed malignant diseases 5.5 years earlier than sons even in this group (P<0.001). Average age at diagnosis for subjects whose fathers and mothers developed malignancy before 50 years was 4.8 years and 4.4 years earlier than those whose fathers and mothers developed malignancy after 50 years old (P<0.05, P<0.001). Sons and daughters were diagnosed with lung cancer 9.3 and 12.6 years earlier than the fathers, and 10.2 and 13.6 years earlier than the mothers, respectively (P<0.001).The daughters in the mother-children group and the father-daughter group were diagnosed with breast cancer 10.5 and 11.1 years earlier than the mothers in the mother-child group (P<0.001).@*Conclusions@#Children develop malignancy earlier than their parents in families with cancer in parents and children. Hence, individuals with a family history of cancer in either of their parents should undergo interventions for cancer screening and early detection at a relatively earlier age compared to the initial screening age recommended by conventional screening guidelines for certain cancers.

4.
Article in Chinese | WPRIM | ID: wpr-791592

ABSTRACT

Objective To investigate the role and significance of opportunistic screening in cervical cancer screening for elderly women aged≥65 years old. Methods The screening data of 1 304 elderly women (≥65 years old) who underwent opportunistic screening for cervical cancer at the Cancer Hospital, Chinese Academy of Medical Sciences, between January 1, 2010, and December 31 st, 2018, were analyzed retrospectively. Women who underwent cervical cytology tests and human papillomavirus (HPV) testing were divided into two groups according to age as following 65-69 and ≥70 years old. Women with abnormal cytology or who were hrHPV-positive were followed up. The cervical cytological abnormalities and high-risk HPV infection rates in women aged≥65 years in opportunistic screening were analyzed. Results Of all cases, 175 had abnormal cytology or were hrHPV-positive. Among the 1 304 women, 69 were TCT-positive, with a positivity rate of 5.3%, including 17 cases (24.6%) of high-degree squamous intraepithelial neoplasia and 3 cases (4.4%) of squamous cell carcinoma. The total abnormality rate of TCT in the 65-to 69-year age group (6.7%, 43 cases) was significantly higher than that in the≥70 age group (3.9%, 26 cases), and the difference was statistically significant between the two groups (P=0.024). The overall prevalence of hrHPV infection was 10.7% (139/1 304). HPV58 (31/174, 17.9%) was identified as the most common high-risk HPV type, followed by HPV16, HPV52, HPV33, and HPV31. Follow-up showed that 50.3% of the women had never been screened in the past 10 years, and no statistically significant difference in TCT abnormality and hrHPV infection positivity rate were found between those who had been screened (80 cases) and those who had not been screened at least once in 5 years (87 cases) (P>0.05). Conclusion Attention should be paid to the screening for cervical cancer in elderly women aged ≥65 years old. Opportunistic screening is a supplement to the population-based organized cervical cancer screening. The termination age of cervical cancer screening for elderly women may be appropriately extended.

5.
Chinese Journal of Geriatrics ; (12): 265-268, 2019.
Article in Chinese | WPRIM | ID: wpr-745504

ABSTRACT

Objective To investigate the clinical efficacy and safety of carotid endarterectomy (CEA)and carotid artery stenting(CAS)for the treatment of carotid artery stenosis in the elderly.Methods Clinical data of 116 elderly patients aged over 65 years with carotid artery stenosis were retrospectively analyzed.Of 116 patients,73 patients underwent CAS(the CAS group) and 32 received CEA(the CEA group).The success rate,30-day perioperative complications and follow-up results were compared between the two groups.Results There was no significant difference in the success rate (96.8% vs.100.0%,P > 0.05),30-day perioperative complications,such as bradycardia (6.25% vs.4.5%,x2 =0.228,P=0.663),acute myocardial infarction(0.0 vs.1.4%,x2 =0.432,P=0.511),transient hypotension(6.3% vs.8.1%,x2 =0.114,P =0.735),ischemic stroke(6.3% vs.6.8%,x2 =0.009,P =0.923),and cerebral hyperperfusion syndrome (18.8 % vs.10.8%,x2 =0.009,P =0.923),between the CEA and CAS groups.The incidence of persistent hypotension was lower in the CEA group than in the CAS group(3.1% vs.17.6%,x2 =4.398,P=0.036).No significant difference was found in carotid artery restenosis(moderate:6.3% vs.8.1%,x2 =0.114,P =0.735;severe:3.1 % vs.2.7%,x2=0.014,P=0.905)and ipsilateral stroke(3.1% vs.5.4%,x2 =0.279,P=0.598)between the CEA and CAS groups at one-year fellow-up.Conclusions Both CEA and CAS have good effieacies in treating carotid artery stenosis in the elderly,while the incidence of persistent hypotension is higher with CAS than with CEA.

6.
Article in Chinese | WPRIM | ID: wpr-709006

ABSTRACT

Objective To understand the current status of social support among the elderly,aged ≥60 years,as well as to identify influencing factors and to provide a reference for relevant health care services.Methods Publications about social support of the elderly were collected by searching the database of CNKI,VIP,Wanfang Data,Pubmed,and Web of Science.A random effects model was employed according to the results of heterogeneity (I2>50%) to pool the extracted data.Results Thirty-two articles were included,with a total sample of 21 763 articles.Total scores of social support and three dimensions were low,with social support of 34.047 (95%CI:32.532-35.563),subjective support of 19.218 (95%CI:17.589-20.846),objective support of 7.787 (95%CI:7.483-8.091),and support utilization of 7.075 (95%CI:6.884-7.266).Scores of elderly with character of high age (aged 80:30.907,95%CI:28.378-33.436),female (32.512,95%CI:30.723-34.300),low education (illiteracy:32.088,95%CI:30.944-33.231;primary school:32.709,95%CI:30.069-35.349),country side (33.780,95%CI:31.523-36.038),empty nest (32.301,95%CI:27.061-37.542) and incomplete marriage (discoverture:27.044,95%CI:24.652-29.437;divorced:29.159,95%CI:24.520-33.791) was lower than the others.Conclusions The current status of social support is not optimistic.Scores of social support and its dimensions were relatively low,and a significant difference was found between elderly of different character,indicating that health interventions should be implemented based on character.

7.
Article in Chinese | WPRIM | ID: wpr-498474

ABSTRACT

Breast cancer is the first malignant tumor of women, and the incidence is still rising. Although the overall survival rate of breast cancer is high, the difference in prognosis is significant with different stage. Finding the patients at early stage and commencement of therapy timely by breast cancer screening is the key to reduce the incidence and improve the survival rate. At present, clinical breast examination, ultrasonography, mammography and MRI are still the most common methods for breast cancer screening, but in view of the specific technology and specific population it remains controversial as to which techniques are the best, especially the value of ultrasonography still needs to be confirmed in randomized clinical trials. With the constant improvement of technologies and programs, the breast cancer screening work will be more standardized and optimized.

8.
Article in Chinese | WPRIM | ID: wpr-748206

ABSTRACT

OBJECTIVE@#To evaluate the modified rhytidectomy incision in superficial parotidectomy.@*METHOD@#Thirty-five patients with superficial parotid tumor were included in this study. A modified rhytidectomy incision often used in facial plastic surgery was used for superficial parotidectomy and subtotal superficial parotidectomy with preservation of facial nerve and great auricular nerve. The follow-up study included the exposed region, the cosmetic effect of this approach and the rate of complication.@*RESULT@#All patients healed without salivary fistula, and were satisfied with this modified approach. Temporary paralysis of the marginal mandibular branch of facial nerve were found in five patients, and six patients felt insensible around earlobe after operation. They all recovered in 1 to 3 months after surgery, no recurrence was happened during follow-up in 36 to 60 months (median follow-up period was 48 months).@*CONCLUSION@#The modified rhytidectomy incision provided good exposure, had less complication and better cosmetic outcome.


Subject(s)
Adult , Aged , Female , Follow-Up Studies , Humans , Male , Middle Aged , Parotid Neoplasms , General Surgery , Rhytidoplasty , Methods , Young Adult
9.
Chinese Journal of Oncology ; (12): 549-554, 2014.
Article in Chinese | WPRIM | ID: wpr-272336

ABSTRACT

<p><b>OBJECTIVE</b>To report the results of low-dose computed tomography (LDCT) screening for early lung cancer in 4 690 asymptomatic participants at the Cancer Hospital, Chinese Academy of Medical Sciences between July 2007 and June 2012.</p><p><b>METHODS</b>After informed consent and questionnaire forms were obtained, 4 690 asymptomatic participants ≥ 40 years underwent chest low dose spiral CT scanning. According to the National Comprehensive Cancer Network (NCCN) guideline for lung cancer screening (version 1.1, 2012), all participants were assigned to three groups, namely high-risk, moderate-risk and low-risk groups. In terms of gender, smoking history and second-hand tobacco smoking exposure history, two other groups named male and female never-smoker groups who were exposed to second-hand tobacco smoking were designated. The positive results were identified as at least one solid or part-solid nodule measuring ≥ 5 mm, or non-solid nodule ≥ 8 mm in diameter. LDCT scanning protocol, criteria of management according to the size and consistency of pulmonary nodules were compliant with the International Early Lung Cancer Active Program (I-ELCAP). TNM staging of all lung cancers were based on the clinical evidence and pathological findings.</p><p><b>RESULTS</b>In various risk status group of the participants, the percentage of positive results of baseline CT were 27.0% (86/319), 19.3% (199/1 029) and 11.3% (377/3 342), respectively. A total of 26 participants (27 lesions) were diagnosed as lung cancer (11 in men, 15 in women). The detection rate of lung cancer was 0.6% (26/4 690). Besides a SCLC (limited-disease, LD), 25 cases (76.0%) were stage I including 24 NSCLC and one cacinoid on baseline LDCT and the surgical resection rate was 88.5% (23/26). The diameter of resected cancers was 6.9-29.5 mm (median, 16.3 mm). For female never smokers aged 40 years or older who were exposed to second-hand smoking, the detection rate of lung cancer was higher than that of the high-risk and male never smokers who were exposed to second-hand smoking (1.4% vs. 0.9%, 0.4%).</p><p><b>CONCLUSIONS</b>The results indicate that LDCT can detect small lung cancers and most of the cancers are detected at an early stage. Emphasis should be placed on the non-smoking female individuals who are exposed to second-hand smoking in China.</p>


Subject(s)
Carcinoma, Non-Small-Cell Lung , Diagnosis , Epidemiology , China , Early Detection of Cancer , Female , Humans , Lung Neoplasms , Diagnosis , Epidemiology , Male , Mass Screening , Neoplasm Staging , Prevalence , Risk Factors , Smoking , Epidemiology , Tomography, Spiral Computed , Tomography, X-Ray Computed
10.
Acta Pharmaceutica Sinica ; (12): 1433-7, 2014.
Article in English | WPRIM | ID: wpr-457234

ABSTRACT

Two new sulfated sesquiterpenoids, megastigman-7-ene-3, 5, 6, 9-tetrol-3-O-β-D-6'-sulfonated-glucopyranoside (1) and 3-O-β-D-6'-sulfonated-glucopyranosyl-6-(3-oxo-2-butenylidenyl)-1, 1, 5-trimethylcyclohexan-5-ol (2), along with one known sesquitepenoid compound icariside B1 (3) were isolated from the whole herb of Petasites tricholobus Franch. Their structures were identified by their chemical and spectroscopic characters. All obtained compounds were tested for their cytotoxicity against four cancer cell lines.

11.
Article in Chinese | WPRIM | ID: wpr-452653

ABSTRACT

Objective To explore whether the Chinese medicine Guben Yiliu III can improve the effect of gemcit -abine on human pancreatic cancer xenograft in nude mice . Methods Nude mice with transplanted human pancreatic cancer were divided randomly into 4 groups: control group, gemcitabine treatment group , combined ( Guben Yiliu III +gemcitabine) group, and Guben Yiliu III group, 10 mice in each group.The gemcitabine group and combined group were treated with gemcitabine from the 8th day after transplantation in a dose of 100 mg/kg by i.p.injection, twice a week. Guben Yiliu III and combined groups were given the aqueous solution of Guben Yiliu III granules p .o.since the 8th day af-ter transplantation .Result The inhibition rate of transplanted tumor in the three treatment groups were 48.9% in the gemcitabine group , 68.9%in the combined group , and 28.0%in the Guben Yiliu III group .The combined group showed a significantly higher inhibition rate than the gemcitabine group (P<0.05).The gemcitabine group, combined group and Guben Yiliu III group showed a significantly slower growth rate than the control group .However, the combined treatment group showed a pronounced side effect and body weight loss than the other 3 groups .Conclusions The Chinese medicine Guben Yiliu III can improve the inhibitory effect of gemcitabine on nude mice with human pancreatic cancer xenograft in the auxilla of nude mice .

12.
Acta Pharmaceutica Sinica ; (12): 1567-74, 2012.
Article in Chinese | WPRIM | ID: wpr-433015

ABSTRACT

BRAF is one of the most important pro-oncogenes, which is mutated in approximately 8% of human tumors. The most common BRAF mutation is a valine-to-glutamate transition (V600E) that is expressed primarily in melanoma, colorectal cancer and thyroid carcinoma. MEK/ERK is constitutively activated in the cells expressing BRAFV600E, leading to tumor development, invasion, and metastasis. Therefore, BRAFV600E is a therapeutic target for melanoma and some other BRAFV600E tumors. Vemurafenib, a BRAFV600E inhibitor, which was approved by FDA for the treatment of late-stage melanoma in 2011, produces improved rates of overall and progression-free survival in patients with the BRAFV600E mutation, making a dramatic breakthrough in melanoma treatment. Vemurafenib is also an individual target drug based on genetic diagnosis. However, its therapeutic success is limited by the emergence of drug resistance. Therefore, it is important to explore the mechanisms underlying the resistance for developing new inhibitor drugs and for preventing or delaying the resistance evolution to BRAF inhibitor drugs. In this review, we described the role of BRAFV600E as an anti-tumor drug target and the development of BRAF inhibitors. We also discussed the mechanisms leading to resistance of BRAFV600E inhibitors. Furthermore, therapeutic strategies that might be employed to overcome acquired resistance were proposed.

13.
Article in Chinese | WPRIM | ID: wpr-748050

ABSTRACT

OBJECTIVE@#To analyze the oncological outcomes, functional outcomes in patients undergoing supracricoid partial laryngectomy (SCPL). Provide clinical experience for application of SCPL.@*METHOD@#A retrospective analysis of the 115 cases with laryngeal carcinoma accepted SCPL in our department from Jan 1996 to Dec 2004. Use the Kaplan-Meier method to analyze the patients'survival rate. Evaluate the value of reserve larynx function.@*RESULT@#The 5-years survival rates and the decannulation rate was 80.8%, 99.1% respectively; and the average decannulation time was 22.25 days. The mean time of removal of gastric tube was 9.57 days. The function of CHEP was superior to CHP. The vocal function of 115 cases were all achieved in general communication.@*CONCLUSION@#SCPL get better oncological and functional outcomes and allows the preservation of the basic function of the larynx. It's a safe, effective technique and deserved to generalization.


Subject(s)
Adult , Aged , Carcinoma, Squamous Cell , Mortality , Pathology , General Surgery , Cricoid Cartilage , General Surgery , Female , Humans , Laryngeal Neoplasms , Mortality , Pathology , General Surgery , Laryngectomy , Methods , Male , Middle Aged , Retrospective Studies , Survival Rate , Treatment Outcome
14.
Article in Chinese | WPRIM | ID: wpr-748880

ABSTRACT

OBJECTIVE@#To evaluate the treatment of advanced tonsillar carcinoma by radiotherapy plus salvage surgery (R+S) or surgery coupling with postoperative radiotherapy (S+R).@*METHOD@#Clinical data of 48 patients with advanced tonsillar carcinoma who were treated in The 2nd Affiliated Hospital of Sun Yat-sen University from June 1996 to June 2004 was retrospectively analyzed. The patients were divided into R+S group (group A, 21 cases) and S+R group (group B, 27 cases). Treatment outcomes were compared between these two groups. The QOL (quality of life) scale of Washington University (UW-QOL) was used to investigate the patient's quality of life.@*RESULT@#The 5-year survival rates were 42.9% in group A and 45.8% in group B, there was no significant statistical difference between the two groups (P < 0.05). Both the two treatment modalities could reduce the QOL in some degree. The average QOL score of 46 patients was 661.00 +/- 98.52 , group A was 696.09 + 90.70, while group B was 631.52 +/- 96.74, there was a significant statistical difference between the two groups (P < 0.05).@*CONCLUSION@#The two treatment modalities reached similar survivals. However, compared with the S+R, some patients who accepted treatment of R+S could avoid composite resection, reduce functional lesion and improve the QOL.


Subject(s)
Adult , Aged , Carcinoma, Squamous Cell , Radiotherapy , General Surgery , Therapeutics , Female , Humans , Male , Middle Aged , Quality of Life , Retrospective Studies , Survival Rate , Tonsillar Neoplasms , Radiotherapy , General Surgery , Therapeutics , Treatment Outcome
15.
Article in Chinese | WPRIM | ID: wpr-575199

ABSTRACT

Objective To study the pathogenesis, the diagnoses and the pre-hospital emergency treatment of comatose patients. Methods 314 comatose patients admitted to our hospital from September 2003 to September 2004 were analyzed retrospectively and followed in the hospital. Results Among 314 comatose patients, 119 had cerebrovascular accidents, 91 with poisoning, 42 with metabolic diseases, 37 cardiovascular diseases and 25 others. After pre-hospital treatment, 68 patients were recovered, 199 with stable conditions, 31 deterioated and 16 died. Conclusion Among the comatose patients, cerebral diseases and poisoning accounted for the most. The pre-hospital treatment could improve the successful rate of rescue.

16.
Article in Chinese | WPRIM | ID: wpr-535991

ABSTRACT

Objective To study the effect of finasteride on bleeding associated with suprapubic prostatectomy and transurethral resection of prostate (TURP). Methods CD 34 ,bcl-2,PCNA and VEGF expressions in the prostatic tissues were studied by means of immunohistochemical method in 89 patients undergone prostatectomy,43 of them had taken fenateride and the other 46 did not.Acomparative study of clinical data and immunohistochemical parameters was made between the 2 groups. Results The volume of bleeding and blood transfusion needed were much less in the group treated with fenasteride.The microyascular density as studied by immunohistochemistry was much less in the fenasteride group.The expressions of bcl-2,PCNA and VEGF were also different between the 2 groups ( P

SELECTION OF CITATIONS
SEARCH DETAIL