Objective To investigate the incidence and clinical characteristics of mitochondrial tRNA Leu(UUR) gene at nucleotide 3243 A to G mutation in diabetic patients in Dalian District of China. Methods According to ADA(1997)/WHO(1999) diagnostic criteria of diabetes mellitus (DM), 629 patients with DM were screened by polymerase chain reaction and restriction fragment lenghth polymorphism. Genetic and clinical analyses were performed in unrelated patients with the mutation in mtDNA and their family members. Results Six unrelated subjects (probands) with the mutation were detected. Then 6 diabetes patients and 1 IGT from the first degree relatives of these 6 probands were also identified being with the mutation, in which 11 patients are associated with sensory hearing loss and 5 patients requires insulin therapy due to secondary failure to oral hypoglycemic agents. All these patients had lower weight, were younger at diagnosis and most of them were maternally inherited. Conclusion The mutation at nucleotide 3243 in the mitochondrial tRNA Leu(UUR) gene is an important cause of diabetes in Dalian District of China. Compared with the DM patients without the mutation, the clinical characteristics associated with this mutation are young at onset, non obese, maternally inherited and deafness, et al.

AIM:To investigate atrial natriuretic peptide(ANP) circadian in the encapsulated human ANP(hANP) cDNA transfected cells,to alter the ANP circadian by artificial control to achieve the objective of effectively treat hypertension or congestive heart failure(CHF). METHODS:ANP cDNA was transfected into Chinese hamster ovary(CHO) cells,which were encapsulated in polycarprolactone(PCL) tubes.The longterm survival of transfected CHO cells and the levels of ANP secreted were detected.Circadian rhythm of ANP secreted by encapsulated transfected cells was also studied,which was regulated by melatonin. RESULTS:During culturing,the ANP level secreted by transfected CHO cells in 2 mL of culture medium within 24 hours could reach 210.3 ng/L in a 20 mm-long and 2 mm-diameter PCL tube.The section of ANP displayed a circadian variation:higher in daytime,but lower at night.The acrophase of circadian rhythm was 4:15 but could be shifted to 7:55 after melatonin management. CONCLUSION:ANP cDNA transfected CHO cells that encapsulated into PCL tube can secret ANP,which might be suitable for the future implantation into human body.Our research provides a new approach in the treatment of hypertension and CHF by ANP.

Sixty-two patients with type 2 diabetes were treated with acarbose combined intensive insulin therapy( combined intensive group)or intensive insulin therapy alone (simple intensive group).As the blood glucose control reached the target,the mean amplitude of glycaemic excursion (MAGE),the absolute difference between the mean of daily differences ( MODD ),and standard deviation of blood glucose (SDBG) in combined intensive group were lower than those in simple intensive group [ ( 3.76 ± 1.47 vs 6.52 ± 1.57 ) mmol/L,( 0.57 ±0.49 vs 1.10 ±0.69 )mmol/L,( 1.44±0.60 vs 2.42±0.92 ) mmol/L,all P＜0.01 ].Daily mean blood glucose (MBG) of the former group was better than that of the latter group [ (7.08±0.69 vs 8.27 ± 1.31 ) mmol/L,P＜0.01 ].By the end of treatment,HbA1c [ 6.77％ ± 0.57％ vs 7.21％ ±0.83％,P＜0.05 ],incidence of hypoglycemia( 29％ vs 48％,P＜0.01 ),and body mass index[ (24.14±2.7 vs 27.63±3.41 ) kg/m2,P＜0.01 ] in combined intensive group were statistically improved more than those in the simple intensive group.

Objective To investigate the utilization of ultrasound monitoring the renal blood flow during extracorporeal membrane oxygenation (ECMO).Methods Twentry one cases,who received veinartery ECMO for heart failure,were examinated by bed-side ultrasound before the ECMO initiated,right after the ECMO initiated,each day after the ECMO initiated,and right after the ECMO weaned.The renal interlobar artery peak velocity (Vmax) was measured,and the renal interlobar artery resistant index (RI) was calculated,as well as the values of the serum creatinine (SCr) and blood urea nitrogen (BUN) were recorded.All the data were compared.Results Compared to the variables right after the ECMO initiated,thc Vmax incrcascd (P ＜ 0.05) two days after ECMO initiated and right after the ECMO weaned,while RI (P ＜ 0.05),SCr (P ＜ 0.05) and BUN (P ＜ 0.05) decreased,there being significant differences (P ＜ 0.05).Conclusions While treating patients with extracorporeal membrane oxygenation,the ultrasound can monitoring the renal blood flow effectively,and provide important parameters for the clinical doctors as the basis of the diagnosis and treatment.

Objective:To investigate the influence of low-dose ionizing radiation on the expression level of serum insulin-like growth factor binding protein-3 (IGFBP-3) in radiation workers in hospitals.Methods:183 radiation workers were randomly selected and grouped by work type including interventional radiology ( n=37), nuclear medicine ( n=43), radiotherapy ( n=48), and diagnostic radiology ( n=55). The content of IGFBP-3 in the serum of radiation workers was detected by ELISA assay. Results:It was observed that the expression level of serum IGFBP-3 in the four groups had significant differences ( F=6.056, P<0.05), and the content of serum IGFBP-3 in the interventional radiology group was significantly higher than that of nuclear medicine, radiotherapy, and diagnostic radiology groups ( t= 2.815, 3.611, 3.936, P<0.05). The concentration of IGFBP-3 in the serum of radiation workers among different annual effective dose groups was statistically different ( F=8.380, P<0.05), which gradually increased with the increase of annual effective dose and length of service ( rs=0.202, 0.151, P<0.05). Conclusions:The expression level of serum IGFBP-3 has the potential to be used as a biomarker to reflect the cumulative exposure of long-term chronic low-dose ionizing radiation.

Objective:Based on the artificial intelligence (AI) technology in endoscopy and the internet platform, to explore and construct a safe, standardized, scientific and rigorous database for digestive endoscopy, and to provide reference and evidence for the data quality control of AI in digestive endoscopy in China.Methods:After referring to relevant guidelines and standards, data collection and labelling standards of digestive endoscopy of 12 common gastrointestinal diseases were determined. The software of online collection and labelling of multi-center digestive endoscopy data in Shandong Province was developed. Endoscopic equipment with a domestic market share of >5% was used and dozens of experienced endoscopists from 9 medical centers in Shandong Province were uniformly trained for data labelling. From July 2019 to July 2020, the endoscopic examination data from 9 medical centers including Qilu Hospital of Shandong University, Shandong Provincial Hospital , Liaocheng People′s Hospital, Linyi People′s Hospital, Weihai Municipal Hospital, Taian City Central Hospital, Binzhou Medical University Hospital, Yantai Yuhuangding Hospital and Qilu Hospital of Shandong University (Qingdao) were prospectively and continuously collected and labeled. The optimized, desensitized, and generalized data were uploaded to the server. After the file synchronization, data processing, and expert review, a multi-center digestive endoscopy AI database with standard data collection and labelling in Shandong Province was constructed, namely cloud platform. Descriptive methods were used for statistical analysis.Results:The collection and labelling standards for multi-center digestive endoscopy AI data in Shandong province was established. The software of online collection and labelling of multi-center digestive endoscopy AI data in Shandong province was developed. The database in Shandong province was successfully constructed. In the database, 43 010 lesions, 40 353 images, and 11 289 examinations were labeled. Among them, there were 2 906 cases of early esophageal cancer, 2 912 cases of early gastric cancer, 2 397 cases of early colorectal cancer, and 9 773 cases of colorectal polyps (5 539 cases of adenomatous polyps, 1 161 cases of non-adenomatous polyps and 3 073 case of undetermined polyps).Conclusions:The multi-center AI cloud platform for digestive endoscopy in Shandong Province adopts unified standards and collection and labeling software, which ensures the safety and standardization of endoscopy data. It provides a reference and basis for the construction of a quality control system for standardized data collection and labelling of digestive endoscopy AI data in our country and for the third-party data supervision.

ObjectiveTo explore the psychological defense styles and family environment among male prisoners of different terms of imprisonment， and to analyse the relationship between their psychological defense styles and family environment. MethodsA total of 200 male prisoners in a prison in Guangdong were randomly selected from April to June 2015， and they were classified into less than 5 years of imprisonment group （n=108） and 5 years or more imprisonment group （n=92）. Their defense style and family environment were evaluated by Defense Style Questionnaire （DSQ） and Family Environment Scale-Chinese Version （FES-CV）. Pearson correlation analysis was used to test the correlation between each scale score. ResultsThe factor scores of immature defense mechanism and intermediate defense mechanism of DSQ in the group with less than 5 years of imprisonment were lower than those in the group with 5 years or more imprisonment， with statistically significant differences （t=4.198， 1.137， P<0.01）. The scores of FES-CV family intimacy， emotional expression and organizational factors in less than 5 years of imprisonment group were higher than those in 5 years or more imprisonment group （t=3.122， 2.993， 2.203， P<0.01）， and the scores of contradiction factors were lower than those in 5 years or more imprisonment group （t=-3.682， P<0.01）. The scores of DSQ immature， intermediate defense mechanism and concealment factor of male prisoners were negatively correlated with the scores of FES-CV family intimacy and emotional expression factor （r=-0.428~-0.172， P<0.05 or 0.01）， and the scores of 4 factors in DSQ were all positively correlated with the scores of contradiction factor in FES-CV （r=0.175~0.384， P<0.05 or 0.01）. ConclusionCompared with male prisoners with less than 5 years of imprisonment， those with 5 years or more are prone to adopt immature and intermediate defense mechanisms， and their family environments are characterized by apparent contradiction and a lack of family intimacy， emotional expression and organization. Furthermore， the defects of psychological defense mechanism of prisoners are related to their family environment.