Objective　To evaluation the application value of two-phase enhanced spiral CT in pancreatic adenocarcinoma. Methods　Two-phase enhanced spiral CT was performed in 27 cases of pancreatic adenocarcinoma. After plain CT examination, performed arterial phase（25s after infusion）and portal venous phase（60～70s after infusion）with a 150ml bolus injection of contrast material at 3ml/s. CT attenuation values of tumor and normal pancreas in all scanning phase were obtained and the tumor-pancreas contrast was calculated. Results　Mean tumor enhancement were 48±8 HU（arterial phase）and 72±6 HU（portal venous phase）, normal pancreas enhancement were 125±18 HU、98±11 HU, mean tumor-pancreas contrast was significantly differenced on arterial phase （73±21 HU）and portal venous phase （25±12 HU）. Conclusion　Excellent tumor-pancreas contrast is obtained with arterial phase scans, as such it is of significance reference value for diagnosis pancreatic adenocarcinoma.

Humans ; Tinnitus ; therapy ; Treatment Outcome

Objective To investigate the protective mechanism of hyaluronic acid (HA) antagonistic to nitmprusside sodium (SNP) on the tissue engineering cartilage. Methods Alginate culture for two weeks was used to recover phenotype of dedifferentiated chondrocytes. Differentiation state of chondrecytes was analyzed by immunostaining. The growth of alginate-recovered chondrocytes on the chitosan-based scaffold was observed by scanning electron microscope. After cultured for 3 weeks, this tissue engineering cartilage was treated with SNP in the absence or presence of HA combined with specific β1 integrin blocking antibody collagen type Ⅱ and aggreean were detected by RT-PCR and Western blot. Results Collagen type Ⅱ expression in dedifferentiated chondrocytes was significantly enhanced by alginate bead culture. The chitosan-based scaffold supported cell adhesion, proliferation and migration. A dose-dependent inhibitory effect on the expression of collagen type Ⅱ and aggrecan was observed when tissue engineering cartilage was treated with SNP alone. HA significantly promoted collagen type Ⅱ, and aggrecan expression antagonistic to low concentrations of SNP (p<0.05). However, the specific β1,integrin blocking antibody abrogated the effects of HA. Conclusion Alginate culture recovers the phenotype of dedifferentiated chondrocytes. HA abrogats the inhibitory effect of SNP via β1 integrin signal pathway to protect tissue engineering cartilage.

Objective: To systematically evaluate risk factors for cardiometabolic multimorbidity (CMM), so as to provide the evidence for formulating CMM prevention and control strategies. Methods: Publications pertaining to the risk factors for CMM were retrieved from databases, including SinoMed, CNKI, Wanfang Data, VIP, PubMed and Cochrane Library from inception to March 31, 2023. Meta-analysis was performed using the software RevMan 5.4 and Stata 16.0, and sensitivity analysis was performed using the leave-one-out method. The publication bias was evaluated using Egger's test. Results: Totally 494 publications were screened, and 20 publications were included in the final analysis, including 13 cohort studies (covering 1 940 000 participants) and 7 cross-sectional studies (covering 13 000 000 participants). Meta-analysis revealed that female (OR=1.54, 95%CI: 1.40-1.71), middle age (OR=3.80, 95%CI: 3.33-4.34), elderly (OR=2.82, 95%CI: 1.48-5.37), urban resident (OR=1.41, 95%CI: 1.27-1.57), higher education level (OR=2.01, 95%CI: 1.35-3.01), higher economic level (OR=1.21, 95%CI: 1.16-1.25), overweight (OR=1.92, 95%CI: 1.64-2.26), obesity (OR=3.01, 95%CI: 2.30-3.93), central obesity (OR=1.70, 95%CI: 1.12-2.56), smoking (OR=1.27, 95%CI: 1.07-1.51), alcohol consumption (OR=1.27, 95%CI: 1.01-1.59), irregular diet (OR=1.10, 95%CI: 1.02-1.18), insufficient intake of vegetables and fruits (OR=1.12, 95%CI: 1.07-1.17), lack of sleep at night (OR=1.17, 95%CI: 1.08-1.27), and depression (OR=1.50, 95%CI: 1.33-1.69) were risk factors for CMM. Sensitivity analysis of effects of central obesity and alcohol consumption were not robust. No publication bias was examined by Egger's test. Conclusions Female, middle age, elderly, urban resident, higher education level, higher economic level, overweight, obesity, central obesity, smoking, alcohol consumption, irregular diet, insufficient intake of vegetables and fruits, lack of sleep at night and depression are risk factors for CMM.

Taxus is the source plant of anti-cancer drug paclitaxel and its biosynthetic precursor, analogs and derivatives, which has been studying for decades. There are many endemic Taxus species in China, which have been studied in the field of multiple disciplines. Based on the recent studies of the researchers, this review comments on the study of Taxus biology and chemistry. The bibliometric method is used to quantify the global scientific production of Taxus-related research, and identify patterns and tendencies of Taxus-related articles. Gaps are present in knowledge about the genomics, epigenomics, transcriptomics, proteomics, metabolomics and bioinformatics of Taxus and their endophytic fungi. Systems biology and various omics technologies will play an increasingly important role in the coming decades.

Actinin ; genetics ; Adolescent ; Adult ; Asian Continental Ancestry Group ; genetics ; Athletes ; Athletic Performance ; China ; Ethnic Groups ; genetics ; Female ; Humans ; Male ; Polymorphism, Genetic ; Young Adult

Adenocarcinoma ; etiology ; prevention & control ; surgery ; Adenomatous Polyposis Coli ; complications ; genetics ; surgery ; Adolescent ; Adult ; Colectomy ; methods ; Colonic Neoplasms ; etiology ; prevention & control ; surgery ; Female ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Pedigree

Animals ; Cell Line, Tumor ; Colonic Neoplasms ; genetics ; metabolism ; pathology ; Enzyme-Linked Immunosorbent Assay ; Humans ; Interleukin-18 ; biosynthesis ; genetics ; Mice ; Mice, Nude ; Neoplasm Transplantation ; RNA, Messenger ; biosynthesis ; genetics ; Reverse Transcriptase Polymerase Chain Reaction ; Survival Analysis ; Time Factors ; Transfection ; Transplantation, Heterologous

[Objective] To explore whether necroptosis is involved in the mechanism of lung injury induced by intestinal ischemia-reperfusion.[Method] Thirty-two healthy male Sprague-Dawley rats were randomly assigned into 4 groups (n--8):sham operation group (sham group),isehemia/ reperfusion group (I/R group),necroptosis inhibitor necrostatin-1 group (Nec-1 group) and solvent dimethyl sulfoxide (DMSO) group (DMSO group).Model of intestinal I/R injury was produced by clamping the superior mesenteric artery for 1.5 h followed by 6 h reperfusion in rats.Necrostatin-1 1.0 mg/kg was administered 30 min before occlusion in Nec1 group,while the equal volume of DMSO was given instead in DMSO group.The rats were sacrificed at 6 h of reperfusion and the lung tissues were removed for measurement of wet-dry ratio and microscopic examination and scored.The expression of receptor-interacting protein 1 (RIP1) and receptor-interacting protein 3 (RIP3) in lung tissues was detected using Western-blot and immunohistochemistry.[Result] Compared with sham group,lung morphology score and wet/dry ratio in I/R,DMSO group raised (P ＜ 0.05).Lung morphology score and wet/dry ratio statistically declined in Nec-1 group compared with I/R and DMSO group (P ＜ 0.05),while there was no statistical difference of wet/dry ratio between sham group and Nec-1 group (P ＞ 0.05).As the result of westernblot and immunohistochemistry showed,the expression of RIP1 and RIP3 was up-regulated in I/R group and DMSO group (P ＜0.05),which was inhibited by Nec-1 in Nec-1 group (P ＜ 0.05).[Conclusion] Necroptosis is involved in the mechanism of lung injury induced by intestinal ischemia-reperfusion,and Nec-1,the special inhibitor of RIP1,can reduce the injury.

Objective To investigate the role of fibroblasts in nonunion fracture healing using extracorporeal shock wave(ESW) treatment. Methods Thirty healthy rabbits were selected to make the models of non-union fractures of the right tibias, which were then held apart by external fixation. 12 weeks after the operation, hypertrophic non-unions were confirmed in 27 of the rabbits by radiography. These 27 were divided randomly into a treatment group and a control group. The test animals were treated with ESW under general anaesthesia. The two ends of the nonunion fracture were shocked 1 000 times at 0.54 mJ/mm2 and a frequency of 60 times/minute. The nonunions of the control group were treated with external fixations only. Histological examination and transmission electron microscopy(TEM) were conducted after 2 and 6 weeks. Standardized radiographs were taken after 12 weeks of the shock wave treatment. Results ESW induced microfractures, which initiated the healing process of the nonunionfractures. X-rays showed that 8 of the 9 fractures of the treatment group had healed after 12 weeks of EWS treatment, but only 3 of the 9 in the control group had healed. Statistical analysis showed that this difference was significant at the 5% level. After 2 weeks of ESW treatment, TEM showed many collagen fibers around the fibroblasts in the treatment group, with characteristic and periodic transverse lines. This indicated that the fibroblasts had been secreting collagen fibers as osteoblasts. Six weeks later, osteoblasts and fibroblasts had formed bone lacunes, and they had become osteocytes. However osteogenetic activates were not found in the control group. Conclusions Fibroblasts are activated by ESW to better form bone tissue. This process plays an important role in rebuilding broken bones.