Image quality of CBCT under different exposure parameters / 实用口腔医学杂志

Objective:To investigate the imaging quality of CBCT under different exposure parameters and the relationship between subjective and objective evaluation.Methods:CBCT scanners of 6 different suppliers[3D Accuitomo(Morita),i-mCAT(Kavo),5G(NewTom),Smart3D(Beijing Langshi),DCT Pro(Vatech),Vgi(NewTom)]were used to scan the spatial resolution models and head simulators under typical exposure conditions(different device with different tube voltage and current for exposure).The visibility of SedentexCT IQ phantom and anatomical structures generated by different CBCT scanners were compared.For objective evaluation,7 professional evaluators scored CBCT imaging qualities.For subjective evaluation,the resolution(LP/mm)of the images were com-pared among the devices.Results:No significant difference was found by 7 evaluators either intra or inter of the teams.By objective e-valuation,the score of NewTom 5G was 2,that of i-CAT was 5 and that of the others was 4.By subjective evaluation,the LP/mm of i-CAT was 1.8,that of Smart3D was 2.0 and that of the others was 1.0-1.7.The subjective evaluation of image quality obtained un-der different tube voltages and tube currents were significantly different.Conclusion:The subjective and objective evaluations of image quality are approximately consistent.The difference of the subjective image quality may be produced by the different tube voltage and current for exposure.

Mechanism by which exercise controls uric acid level / 中国组织工程研究

BACKGROUND:Excessive accumulation of uric acid in the body can lead to diseases such as hyperuricemia and gout,which is a risk factor for cardiovascular and renal dysfunction.Many sports medicine organizations at home and abroad advocate the formulation of exercise prescription to prevent and treat chronic diseases,but this method has not been effectively carried out in the prevention and treatment of hyperuricemia. OBJECTIVE:Based on an overview of the formation of hyperuricemia and the regulation of uric acid by exercise and its related mechanisms,to condense a program suitable for popular exercise to prevent and assist in the treatment of hyperuricemia,and to propose precautions to be taken when exercising for patients with different stages of hyperuricemia. METHODS:PubMed and CNKI were searched for relevant literature published before October 2023 using the keywords of"uric acid,gout,aerobic exercise,strength training,high-intensity interval training,obesity"in English and Chinese,respectively.Initial screening was done by reading the titles and abstracts to exclude repetitive studies and literature with irrelevant content,and finally 64 papers were included for review. RESULTS AND CONCLUSION:The formation of hyperuricemia is caused by excessive synthesis of uric acid by the liver,insufficient excretion by the kidneys,or both.Exercise can improve the uric acid level in the body by regulating the activity of antioxidant enzymes,the expression of uric acid excretion protein and lipid metabolism.Aerobic exercise,strength training,high-intensity intermittent exercise can effectively regulate uric acid levels,reduce inflammation,promote the expression of uric acid excretion protein and lipid metabolism,and achieve good results in the prevention and treatment of hyperuricemia.Currently,there is a lack of research on the mechanisms underlying direct regulation of uric acid levels by exercise,and future studies need to explore in greater depth the possible mechanisms of regulation of uric acid levels by exercise and refine the effects of different exercise modalities on patients with different characteristics of hyperuricemia.

Chromosomal integration of large DNA fragments in microorganisms: a review / 生物工程学报

The modern bio-fermentation industry requires design and creation of efficient microbial cell factories for directed conversion of raw materials to target products. The main criteria for assessing the performance of microbial cell factories are their product synthesis capacity and stability. Due to the deficiencies of plasmids in gene expression such as instability and being easy to lose, integration of genes into chromosome is often a better choice for stable expression in microbial hosts. To this end, chromosomal gene integration technology has received much attention and has developed rapidly. In this review, we summarize the recent research progresses of chromosomal integration of large DNA fragments in microorganisms, illustrate the principles and features of various technologies, highlight the opportunity brought by the CRISPR-associated transposon systems, and prospect future research direction of this technology.

Clinical application of 68Ga-PSMA-NYM032 PET/CT imaging in patients diagnosed initially with prostate cancer / 中华核医学与分子影像杂志

Objective:To evaluate the clinical application potential of a novel prostate specific membrane antigen (PSMA) targeted PET tracer 68Ga-PSMA-NYM032 in patients diagnosed initially with prostate cancer. Methods:A total of 63 patients (age (68.7±8.7) years) with suspected prostate cancers who received 68Ga-PSMA-NYM032 PET/CT imaging in Affiliated Hospital of Jiangnan University between March 2022 and January 2023 were enrolled prospectively. The diagnostic efficiency of 68Ga-PSMA-NYM032 PET/CT imaging was evaluated in a patient-centered manner. The ROI was drawn to obtain SUV max by semi-quantitative analysis with visual analysis, and the diagnostic threshold of SUV max was obtained by ROC curve analysis. The correlations of SUV max in primary foci with total prostate specific antigen (tPSA) and Gleason score (GS) were analyzed by Spearman rank correlation analysis. Based on the D′Amico risk stratification (prostate specific antigen (PSA)>20 μg/L and ≤20 μg/L, GS>7 and ≤7), the detection rates of metastases by 68Ga-PSMA-NYM032 PET/CT imaging in different stratifications were analyzed by Fisher exact test, and the differences between SUV max of metastases in different stratifications were determined by Mann-Whitney U test. Results:The accuracy of 68Ga-PSMA-NYM032 PET/CT imaging was 92.06%(58/63), the sensitivity was 96.55%(28/29), the specificity was 88.24%(30/34), the positive predictive value was 87.50%(28/32), the negative predictive value was 96.77%(30/31), and the optimal SUV max threshold was 6.9. 68Ga-PSMA-NYM032 showed varying degrees of high uptake in the primary foci of prostate cancer, and SUV max were positively correlated with tPSA and GS ( rs values: 0.657, 0.592, P values: <0.001, 0.001). Stratified analysis showed a statistically significant difference in the detection rate of bone metastases by 68Ga-PSMA-NYM032 PET/CT between the GS>7 and GS≤7 subgroups (9/17 vs 1/12; P=0.019), while no statistical significances were observed in the detection rates of bone metastases or lymph node metastases of another subgroups (all P>0.05). In addition, none of the differences in SUV max of metastases in patients with different stratifications were statistically significant ( z value: from -1.57 to -0.50, all P>0.05). Conclusions:68Ga-PSMA-NYM032 PET/CT imaging has good diagnostic efficacy for prostate cancer, and it may provide a new strategy for the precise diagnosis and treatment of prostate cancer. Besides, GS stratification may affect the detection rate of bone metastases by 68Ga-PSMA-NYM032 PET/CT imaging.

LNX1 inhibits the proliferation,invasion and migration of renal clear cell carcinoma cells by regulating TIAM1/ERK signaling pathway / 肿瘤

Objective:To investigate the effect of ligand of numb-protein X1(LNX1)on the proliferation,invasion and migration of renal clear cell carcinoma cells and its underlying molecular mechanism. Methods:Gene Expression Profiling Interactive Analysis(GEPIA)database was used to analyze the mRNA expression level of LNX1 in renal clear cell carcinoma tissues and its relationship with the prognosis of patients with renal clear cell carcinoma.LNX1 gene specific shRNA(shLNX1)was delivered into renal clear cell carcinoma cell lines 786-O and ACHN by lentiviral infection,and flag-LNX1 plasmid was delivered into 786-O and ACHN cells by transient transfection.CCK-8 assay and colony formation assay were used to assess the effects of LNX1 silencing or overexpression on the proliferation of 786-O and ACHN cells.Transwell assay was used to evaluate the effects of LNX1 silencing or overexpression on the invasion and migration of 786-O and ACHN cells.Bioinformatics analysis was used to screen the downstream target genes of LNX1.Western blotting was used to examine the effects of LNX1 silencing or overexpression on the expression level of T-lymphoma invasion and metastasis-inducing protein 1(TIAM1)as well as the expression levels of total and phosphorylated ERK(phospho-ERK,p-ERK)in the ERK signaling pathway downstream of TIAM1 in 786-O and ACHN cells.786-O and ACHN cells overexpressing LNX1 were treated with proteasome inhibitor MG132,and the protein expression level of TIAM1 was analyzed by Western blotting.Finally,myc-TIAM1 recombinant plasmid was transfected into LNX1-overexpressing cells.Then,the expression levels of proteins in the ERK signaling pathway and the abilities of proliferation,invasion and migration of 786-O and ACHN cells were examined by Western blotting,colony formation assay and Transwell assay,respectively. Results:The mRNA expression level of LNX1 in renal clear cell carcinoma tissue was decreased(P＜0.05)and was positively correlated with the survival time of patients with renal clear cell carcinoma(P＜0.001).LNX1-silencing 786-O and ACHN cells and LNX1-overexpressing 786-O and ACHN cells were constructed successfully.After LNX1 silencing,the proliferation,invasion and migration of 786-O and ACHN cells were significantly enhanced(all P＜0.05).After LNX1 overexpression,the abilities of proliferation,invasion and migration of 786-O and ACHN cells were significantly decreased(all P＜0.05).Bioinformatics analysis identified TIAM1 as a potential target of LNX1.After silencing LNX1,the protein expression levels of TIAM1 and p-ERK were significantly increased(all P＜0.05),while the expression level of ERK remained unchanged.After LNX1 overexpression,the protein expression levels of TIAM1 and p-ERKwere significantly decreased(all P＜0.01),while the expression level of ERK was unchanged.Treatment with proteasome inhibitor MG132 increased the protein expression level of TIAM1 in LNX1-overexpressing 786-O and ACHN cells(P＜0.01 and P＜0.001).After LNX1-overexpressing cells were transfected with myc-TIAM1 plasmid,the protein expression level of p-ERK was increased,the abilities of cell proliferation,invasion and migration were enhanced(all P＜0.05),and the expression level of ERK protein remained unchanged. Conclusion:LNX1 inhibits the proliferation,invasion and migration of renal clear cell carcinoma cells by degrading TIAM1 which further regulates the phosphorylation of ERK.

Effects of alum ice nanoemulsion on hypertrophic scar based on Notch signaling pathway / 国际中医中药杂志

Objective:To investigate the effects of alum ice nanoemulsion on VEGF and TGF-β1 in hypertrophic scar based on Notch signaling pathway.Methods:Totally 144 SD rats were divided into blank control group, model group, triamcinolone acetonide group and alum ice nanoemulsion low-, medium- and high-dose groups according to random number table method, with 24 rats in each group. Except for the blank control group, the rats in other groups were prepared with deep Ⅱ ° burn models. 24 hours after the successful modeling, the model group was given the same amount of normal saline, the rats in alum ice nanoemulsion low-, medium- and high-dose groups were given 8.15, 6.30 and 32.60 mg/ml alum ice nanoemulsion respectively, and the triamcinolone acetonide group was given triamcinolone acetonide twice a day, 0.2 ml each time, for 35 consecutive days. At 14, 21, 28 and 35 d, the collagen fiber surface density was calculated by VG staining. The protein expressions of vascular endothelial growth factor (VEGF), transforming growth factor-β1 (TGF-β1), Notch1 and Jagged1 were detected by Western Blot. The expressions of Notch1 mRNA and Jagged1 mRNA were detected by RT-PCR.Results:Compared with model group, triamcinolone acetonide and different doses of alum ice nanoemulsion groups could decrease collagen fiber surface density, protein expressions of VEGF, TGF-β1, Notch1, Jagged1 and mRNA expressions of Notch1, Jagged1 in different degrees ( P<0.05). Compared with the triamcinolone acetonide group, the collagen fiber surface density, protein expressions of VEGF, TGF-β1, Notch1 and Jagged1 and mRNA expressions of Notch1, Jagged1 in the alum ice nanoemulsion medium-dosage group decreased ( P<0.05). Conclusion:Alum ice nanoemulsion can inhibit hypertrophic scar formation, and its mechanism is related to down-regulating Notch signal pathway related molecules Notch1, Jagged1 protein and mRNA levels, and then down-regulating VEGF and TGF-β1 protein expressions.

Inhibition of Notch signaling pathway reduces angiogenesis in hypertrophic scar / 中南大学学报(医学版)

OBJECTIVES@#Hypertrophic scar (HS) is the most common pathological scar in clinical practice. During its formation, angiogenesis-related factors show dynamic expression. Modern studies have found that Notch signaling pathway has an extremely important role in maintaining the construction and remodeling of vascular endothelial cells and vascular network. The correlation between Notch signaling pathway and angiogenesis in hypertrophic scar has been rarely reported. This study aims to investigate correlation between Notch signaling pathway and the expression of angiogenic factors in a proliferative scar model.@*METHODS@#A total of 81 Sprague Dawley rats (SPF grade) were randomly assigned into a blank control group, a model group, and a blocker group. In the blocker group, a 2 cm diameter circular scald head was placed on the back of the rats for 10 s at 75 ℃ by using a constant temperature and pressure electrothermal scalding apparatus to form a rat deep II° burn model, and a hyperplastic scar model rat was obtained after natural healing of the wound skin (21 to 23 day epithelialization). A syringe was used to inject a needle from the normal skin around the scar at the 1st, 3rd, 5th, 7th, and 14th days after modeling. The γ-secretase inhibitor was injected locally at 2 mg/kg in a dilution of 0.1 mL at the base of the scar. The rats in the model group was injected with the same amount of saline after modeling; the rats in the blank control group was injected with the same amount of saline. Nine rats in each group was randomly killed by air embolization at the 21st, 28th, and 35th days, respectively. The protein expressions of collagen type I (COL-I) and collagen type III (COL-III) were detected by immunohistochemistry. The protein expressions of vascular endothelial growth factor (VEGF), angiopoietin 1 (Ang1), transforming growth factor-β1 (TGF-β1), and matrix metalloproteinase-2 (MMP-2) were detected by Western blotting.@*RESULTS@#Immunohistochemical results showed that, at the 21st,28th, and 35th days, the protein expressions of COL-I and COL-III in the model group were up-regulated compared with the blank control group (all @*CONCLUSIONS@#In the Sprague Dawley rat proliferative scar model, inhibition of Notch signaling pathway could attenuate the expressions of COL-I and COL-III, reduce traumatic scar proliferation, down-regulate the expressions of VEGF, Ang1, TGF-β1, and MMP-2, and inhibit angiogenesis. The expressions of angiogenesis-related factors appeare to be up-regulated during the formation of proliferative scar. When the Notch signaling pathway is inhibited, the up-regulated angiogenic factors show a decreasing trend and the proliferative scar is alleviated, which suggests that Notch signaling pathway may affect the formation of hyperplastic scar by regulating the expression of angiogenic factors.

Experimental study of stomach tumor localization based on magnetic tracer technique / 中华普通外科杂志

Objective To verify the feasibility and safety of stomach tumor marker localization based on magnetic tracer technique in dogs.Methods Six male Beagle dogs were examined by gastroscopy.Then tracer magnets were sent to the "tumor" locations assumed in advance and fixed near the "tumors" by endoscopic soft tissue clamp.Laparoscopic gastric tumor localization was performed under general anesthesia 24 hours later.The tracer magnet was placed near the tumor on the surface of the stomach through the operating hole after the conventional establishment of laparoscope puncture parallel mirror to explore the tracer magnet.After the two magnets were attracted,the location of the tracer magnet seen under the laparoscope was the location of the gastric tumor,so as to complete the labeling and positioning of the lesion.Results All the 6 Beagle dogs were successfully implanted with tracer magnets under gastroscopy.Twenty-four hours after the gastroscopy,the pursuit magnet was successfully implanted during laparoscopic surgery.The two magnets automatically attracted each other and formed a sandwich structure of "tracer magnet-gastric wall-pursuit magnet ",which completed the location and identification of gastric tumor under the laparoscopy.Conclusion Gastroscopy combined with laparoscopy based on magnetic tracer technique is simple,accurate,safe and feasible.

Study of colorectal neoplasms localization based on magnetic tracer technique in an animal model / 中华消化内镜杂志

Objective:To design magnets to locate colorectal neoplasms based on magnetic tracer technology, and to test its feasibility and safety by animal experiments.Methods:The magnets used for endoscopic localization of colorectal tumors consist of a tracer magnet and a pursuit magnet, both of which are ring-shaped Nd-Fe-B magnets. Eight healthy Beagle dogs were used as animal models. Tumor locations were assumed in the different parts of the colon and rectum under colonoscopy. The tracer magnet was sent to the hypothetical tumors by endoscopic soft tissue clamp and fixed near the tumors. After 24 hours, laparoscopic surgery was performed under general anesthesia. The pursuit magnet was inserted near the resected colon or rectum through the main operating hole. The tracer magnet was absorbed to the pursuit magnet to identify the location of tumors.Results:The tracer magnet and pursuit magnet were successfully designed and processed. The suction force between the tracer magnet and the pursuit magnet at zero distance was 16 N. All the 8 Beagle dogs successfully received indwelling of magnets under colonoscopy, and no magnets fell off after 24 hours. After the placement of pursuit magnet under laparoscopy, the two magnets attracted each other rapidly and accurately, and successfully completed localization of tumor site without any damage during the operation.Conclusion:Colonoscopy combined with laparoscopy for colorectal neoplasms localization based on magnetic tracer technique is simple, accurate, safe and feasible.

Establishment of gastrointestinal anastomosis by magnetic compression technique in rabbits / 中华消化内镜杂志

Objective:To study the feasibility of establishing gastrointestinal anastomosis by magnetic compression technique in rabbits.Methods:Ten healthy New Zealand rabbits were selected as models for gastrointestinal anastomosis by magnetic compression technique. Daughter and parent magnets suitable for gastrointestinal anastomosis in rabbits were designed and manufactured. A daughter magnet was inserted into the stomach through the purse fistula in the lack of blood vessel area of gastric body, and was pushed into the duodenum along the intestinal tract. And then a parent magnet was inserted through the stomach fistula. The daughter and parent magnets were automatically attracted and pressed the gastric and intestinal walls after they were adjusted in the proper position. The stomach fistula was closed with purse string suture. After ischemia, necrosis, detachment of the tissues between magnets, gastrointestinal anastomosis was established, and the magnets and necrotic tissues were expelled together from the body through the digestive tract. Survival of experimental animals was observed. Anastomotic specimens were obtained one month after operation. The blasting pressure of anastomotic stoma was measured, and the healing of anastomotic stoma was observed with naked eyes.Results:According to the pre-designed operative route, 10 New Zealand rabbits all successfully completed the operation and survived one month after surgery. No complications occurred during perioperative period. The operation time was 35.80±4.71 min (range 28.00-43.00 min), and the magnet discharge time was 11.40±1.56 days (range 9.00-14.00 days). Anastomotic specimens were obtained one month after the operation. Gross observation showed that the anastomotic stoma of gastrointestinal bypass anastomosis healed well, and the surrounding tissues adhered slightly. The anastomotic bursting pressure was 103.00±7.95 mmHg (range 94.00-113.00 mmHg) (1 mmHg=0.133 kPa).Conclusion:The establishment of gastrointestinal anastomosis by magnetic compression technique in rabbits is simple and effective.

Clinical study on the diagnosis of endoscopic ultrasonography and endoscopic treatment in patients with esophageal submucosal tumor / 中国医师进修杂志

Objective To evaluate the diagnostic value of endoscopic ultrasonography (EUS), and explore the efficacy of endoscopic treatment in patients with esophageal submucosal tumor. Methods Sixty-eight patients with esophageal submucosal tumor were selected, and the tumor was derived from the muscularis mucosa and submucosa according to the common endoscope and endoscopic ultrasonography detection. Endoscopic mucosal resection (EMR) was applied to remove submucosal tumor with diameter less than 1.0 cm, endoscopic piecemeal mucosal resection (EPMR) or endoscopic submucosal dissection (ESD) was applied to remove submucosal tumor with diameter 1.1 - 1.5 cm, and ESD was applied to remove submucosal tumor bigger than 1.5 cm. Samples were examined by pathology after treatment. Results Tumors in all the patients were completely removed, and the tumor diameter was 0.6-2.3 cm. Forty-one cases were treated with EMR, 9 cases were treated with EPMR and 18 cases were treated with ESD. Four patients had intra-operative bleeding that was stopped by electrocoagulation hemostasis. No perforation occurred in all cases. Postoperative pathology revealed 43 cases had leiomyoma, 23 cases had interstitialoma, and 2 cases had lipoma. Patients were reviewed by gastroscope 3 months after operation. The white scars formed in all patients, and there was no residue or recurrence. Conclusions Different origin layers and property of esophageal submucosal tumor can be diagnosed accurately by EUS, and endoscopic therapy (EMR, EPMR and ESD) is an effective treatment for submucosal tumor from muscularis mucosa and submucosa. Endoscopic therapy is safe and effective. It provides sufficient pathological information.

Preparation and in vitro release behavior of adiponectin microsphere-scaffold composite / 实用口腔医学杂志

Objective:To prepare a bone substitute using microsphere scaffold containing adiponectin(APN)and to investigate the release behavior of the scaffold in vitro.Methods:Chitosan microsphere was developed by an emulsion-ionic cross-linking method. Poly (L-lactic-co-glycolic)acid (PLGA)and β-tricalcium phosphate (β-TCP)were used to prepare microsphere scaffold containing APN.The morphology,particle size,drug loading,incorporation efficiency and release behavior of the microsphere were examined. Results:The APN containing microsphere showed good spherical geometry,suitable size and microporosity under scanning electron microscope.The average diameter of the milipore was 20 -200 μm;the drug loading and incorporation efficiency were 1 .3% and 70.3% respectively.The controled-release process continued for 91 days.The extract solution from the APN microsphere-scaffold promoted MC3T3 cell proliferation without cytotoxicity.Conclusion:The APN microsphere-scaffold has sustained release function and may promote osteoblast proliferation.

Analysis of clinical effect and management status of 57 patients with type 2 diabetes mellitus after gastric bypass operation / 中国医师进修杂志

Objective To investigate the clinical effect of gastric bypass operation on treating type 2diabetes,and analyze the management status.Methods Fifty-seven patients wiith type 2 diabetes treated by gastric bypass operation were divided by different body mass index(BMI) into 4 groups:group A( BMI ＜ 20kg/m2) with 8 cases,group B (20 kg/m2≤BMI ＜24 kg/m2) with 21 cases,group C (24 kg/m2≤BMI ＜27kg/m2) with 17 cases and group D (BMI ≥27 kg/m2) with 11 cases.The control of blood glucose and glycosylated hemoglobin,changes of diets and body weight,diabetes complications,adverse reactions after operation and postoperative management were followed up or reviewed.The clinical data were analyzed comprehensively.Results The cure rate of group C was the highest [ 70.6％( 12/17 ) ],while the cure rate of group A was the lowest (0).The overall cure rate was 43.9％(25/57) and the overall improvement rate was 28.1％(16/57).The overall efficient rate was 71.9％(41/57) and the overall inefficient rate was 28.1％(16/57).Apart from a few patients had malnutrition,amenorrhea,bad stomach,diarrhea and poor diet after leaving the hospital,other patients had no surgery complications and no patients died.There was no clinician to follow up and did education to these patients after operation.Conchusions Gastric bypass operation is safe and effective for obese and non-obese patients with type 2 diabetes.It is a new method to weat type 2diabetes at present,but the indications should be grasped and operation enlargement must he prevented.The management of teams of physicians,surgeons,dietitians,nurses should be established afler operation.

Distribution characteristics of syndrome types in essential hypertension / 中西医结合学报

Objective:To investigate the distribution characteristics of syndrome types of traditional Chinese medicine (TCM) in essential hypertension and to explore the distribution rule of TCM syndromes. Methods: A multicenter, large-sample survey method of clinical epidemiology was applied to choose the patients with essential hypertension from North, Middle, and South China. A questionnaire was designed and filled in, then 477 untreated patients with first-diagnosed essential hypertension were selected and the information was recorded into FileMaker database. A cluster analysis method was utilized to study the TCM syndrome distribution rule of essential hypertension. Results: Two-step cluster analysis was done from 3 to 7 clusters. Seven clusters were appropriate, which included deficiency of heart and kidney qi, hyperactivity of liver-yang, deficiency of yin and yang, stagnation of phlegm-dampness, phlegm-heat (subtype of stagnation of phlegm-dampness), blood stasis obstructing collaterals, and other syndromes. The symptoms presenting high percentage in each cluster were more significant in TCM theory. The syndromes of hyperactivity of liver-yang (24.1%) and stagnation of phlegm-dampness (27.1%) presented the high percentages, and deficiency of heart and kidney qi (10.1%), deficiency of yin and yang (8.4%), and blood stasis obstructing collaterals (9.0%) presented the low percentages. Conclusion: As compared with the current syndrome differentiation criteria, two-step cluster analysis results not only include the syndromes of deficiency of yin and yang, hyperactivity of liver-yang, stagnation of phlegm-dampness, but also cover qi deficiency and blood stasis.

Endoscopic and pathological characteristics of early esophageal carcinoma / 中华消化外科杂志

Objective To analyze and investigate endoscopic and pathological characteristics in the diagnosis of early esophageal carcinoma. Methods The clinical data of 62 patients with early esophageal carcinoma who had been admitted to Southwest Hospital from January 2003 to December 2007 were retrospectively analyzed. Results Of all patients, 8 had upper esophageal carcinoma, 42 had middle esophageal carcinoma and 12 had lower esophageal carcinoma. The tumor growth patterns included surface diffusion growth (n = 30), bidirectional growth (n = 11), intracavitary growth (n = 9), intra-esophageal wall growth (n = 7) and mixed growth (n = 5). The diameter of lesions ranged from 1.0 cm to 2.9 cm in majority. Surgical resection was done in 38 patients, endoscopic mucosal resection in 23 patients and endoscopic submucosal dissection in 1 patient. Postoperative pathological examination showed that 13 patients had in situ carcinoma, 22 had intramucosal carcinoma and 27 had submucosal carcinoma. The lymph node metastatic rate of intramucosal carcinoma and submucosal carcinoma were 5% (1/22) and 15% (4/27), respectively. The numbers of squamous cell carcinoma, adenocarcinoma, small cell carcinoma, sarcoma carcinoma and spindle carcinoma were 57, 2, 1, 1, 1, respectively. ConelusionsEarly esophageal carcinoma tends to appear in the middle part of esophagus, and with surface diffusion growth type. Most of the early esophageal carcinoma are squamous cell carcinoma. Endoscopy combined with lugol's iodine and methyleneblue staining is effective in detecting early esophageal carcinoma.

Application of activating circulation to remove blood stasis in geriatrics / 中华中医药杂志

Blood stasis is one of the main pathogenesis of geriatrics.The main traits of geriatrics blood stasis are: blood stasis mainly induced by def iciency,def iciency and stasis is concomitant,stasis builds up gradually,symptoms of blood stasis aren’t mandatory in clinic practice,the range and severity of blood stasis is so wide and severe that it’s hard to be dissipated.Activating circulation to dissipate stasis is followed through the whole therapeutic process,and often used with replenishing qi,invigorating the kidney,and nourishing blood in order to dissipate stasis without hurting vital qi as well as reinforcing vital energy to dissipate stasis.

Transfering the target values from the WHO-IFCC reference material for apolipoproteins A1 and B to in-house calibrator / 中华检验医学杂志

Objective To prepare in-house calibrator of apolipoprotein A1 and apolipoprotein B with the values are traceable to the WHO-International reference materials SP1-01 and SP3-07.Methods We participated in the Northwest lipid research laboratory (NWLRL) protocol for target value transfer of WHO-IFCC apo A1 and apoB reference materials, and evaluated of comparability of the measurement.The analyses were performed on a Olympus AU 400, apo A1 and apoB were determined by immunoturbidimetric endpoint method.Results Through 3-step study, the precision and accuracy of apo A1 and apoB determination of our company met the NWLRL criteria.Correlation coefficients between obtained and assigned values of NWLRL on 40 individual serum samples were 0.983 for apo A1, 0.987 for apoB, the average absolute bias were 2.7 % for apo A1, 3.0 % for apoB, respectively.Conclusion NWLRL issued the certificate to Zhongsheng Beikong Bio-Technology and Science Inc.for the in-house apo A1 and apoB calibrator values are traceable to the WHO- International reference materials.