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Radiotherapy is a primary method for treating tumors. However, since surrounding healthy tissues may also receive a certain dose of irradiation during the radiotherapy, they may suffer from radiation-induced damage, which is even serious for certain patients. Injectable hydrogels are expected to achieve the spacing between target areas and their surrounding tissues during radiotherapy, thus increasing the dose to the target areas while reducing the risk of radiation-induced damage to surrounding healthy tissues and organs. Accordingly, the quality of life of the patients can be improved. Therefore, applying injectable hydrogels serves as a potential strategy for reducing the adverse reactions associated with radiotherapy. This paper reviews the latest research progress in the spacing and protection of hydrogels in radiotherapy for different tumors.
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BackgroundPatients with schizophrenia are at high risk of suffering from metabolic syndrome. Most previous studies on the influencing factors of metabolic syndrome focused on the inpatients and limited ones on patients dwelling in community. ObjectiveTo explore the influencing factors at different risk levels of metabolic syndrome in community-dwelling patients with schizophrenia in Guangzhou， so as to provide references for future interventions on metabolic syndrome in this patient population. MethodsIn November 2021， 3 339 patients with schizophrenia who were registered in and administered by Guangzhou Mental Health Information System were included. All these patients had finished the physical examination in 2020， and whether they had metabolic syndrome was assessed basing on Guideline for the prevention and treatment of type 2 diabetes mellitus in China （2020 edition）. Patients were divided into high-risk group （n=423）， critical group （n=1 524） and metabolic syndrome group （n=1 392） according to the Chinese expert consensus on the management of metabolic syndrome in patients with schizophrenia. Multiple logistic regression analysis were performed on the risk factors of metabolic syndrome in community-dwelling patients with schizophrenia. ResultsThe prevalence rate of metabolic syndrome in community-dwelling patients with schizophrenia was 41.69%. Univariate analysis showed that the results in gender （χ2=44.610）， age （χ2=55.992）， marriage status （χ2=30.755）， illness course （χ2=25.913） and body mass index （χ2=829.265） were significantly different among the three groups （P<0.01）. Kruskal-Wallis H test showed that the levels of waist circumference （H=920.331）， systolic blood pressure （H=436.673）， diastolic blood pressure （H=393.337）， fasting blood glucose （H=807.304）， triglyceride （H=1 134.125） and high-density lipoprotein cholesterol （H=593.615） among the three groups were significantly different （P<0.01）. Logistic regression analysis showed that age ≥50 （OR=1.761， 95% CI： 1.087~2.853）， overweight （OR=2.418， 95% CI： 1.862~3.140） and obesity （OR=57.903， 95% CI： 14.340~233.802） were risk factors contributing to high-risk patients becoming critical population （P<0.05 or 0.01）. Female gender （OR=1.295， 95% CI： 1.034~1.622）， aged 40~49 （OR=2.597， 95% CI： 1.582~4.263）， age ≥50 （OR=4.392， 95% CI： 2.609~7.395）， overweight （OR=7.844， 95% CI： 6.018~10.223） and obesity （OR=426.785， 95% CI： 105.724~1 722.839） were risk factors for high-risk patients developing into metabolic syndrome population （P<0.05 or 0.01）. ConclusionThe prevalence rate of metabolic syndrome is higher in community-dwelling patients with schizophrenia. Female gender， older age， overweight and obesity would increase the risk of metabolic syndrome in schizophrenic patients. ［Funded by Health Science and Technology Project in Guangzhou （number， 20221A010028）］
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Objective:To investigate the efficacy of Peibao capsules combined with letrozole in the treatment of ovulatory infertility and its effects on serum sex hormone levels. Methods:Sixty patients with ovulatory infertility who received treatment in Taizhou Cancer Hospital from January 2017 to December 2019 were included in this study. They were randomly assigned to receive treatment with either letrozole (control group, n = 30) or Peibao capsules combined with letrozole (observation group, n = 30) starting at the 5 th day of the menstrual cycle for 5 days, totally 3 menstrual cycles. Before and after treatment, dominant follicle diameter, endometrial thickness, ovarian artery resistance index and pulsatility index, serum sex hormone level, ovulation rate and pregnancy rate were compared between the control and observation groups. Results:After treatment, dominant follicle diameter and endometrial thickness in the observation group were (18.41 ± 0.54) mm and (8.79 ± 0.56) mm, respectively, which were significantly greater than those in the control group [(17.79 ± 0.47) mm and (7.82 ± 0.62) mm, t = 4.744 and 6.359, both P < 0.05]. After treatment, ovarian arterial resistance index and pulsatility index in the observation group were 0.97 ± 0.13 and 0.56 ± 0.04, respectively, which were significantly lower than those in the control group [1.08 ± 0.10 and 0.65 ± 0.04, t = 3.674, 8.714, both P < 0.05]. After treatment, serum progesterone, estradiol and luteinizing hormone in the observation group were (0.93 ± 0.14) μg/L, (75.41 ± 6.29) ng/L and (9.47 ± 0.61) IU/L, respectively, which were significantly higher than those in the control group [(0.78 ± 0.12) μg/L, (58.23 ± 5.46) ng/L and (8.18 ± 0.65) IU/L, t = 4.456, 11.297, 7.926, all P < 0.05]. Ovulation rate and pregnancy rate in the observation group were 60.00% (18/30) and 46.67% (14/30), respectively, which were significantly higher than those in the control group [33.33% (10/30) and 23.33% (7/30), χ 2 = 4.286, 3.897, both P < 0.05). Conclusion:Peibao capsules combined with letrozole is highly effective in the treatment of ovulatory infertility. It can improve patient's serum sex hormone level, promote ovulation, and increase pregnancy rate.
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【Objective】 To develop a new approach for the preparation of 0.7~0.8 hematocrit concentrated washed red blood cells(RBCs) for fetal anemia in utero transfusion and apply it in clinical. 【Methods】 The erythrocyte suspension and frozen stored erythrocytes within expiry date in Guangzhou Blood Center from March 2020 to February 2021 were taken to prepare concentrated washed RBCs. According to the derivation formula, corresponding weight of RBC preservation solution was added to obtain 0.7~0.8 hematocrit concentrated washed RBCs. Routine blood test data were statistically analyzed by single-sample t test, and P<0.05 was considered statistically significant. Qualified Rh-negative/ O-type 0.7~0.8 hematocrit concentrated RBCs within expiry date were used in clinical intrauterine blood transfusion. 【Results】 The hematocrit of concentrated washing RBCs prepared by the new approach could reach 0.7~0.8. The RBCs count (8.389 ±0.808)×1 012/ L and hemoglobin content(233.730±15.498)g/L were higher while the erythrocyte count (0.732±0.469)×109 /L and platelets count(26.000±26.276)×109/L were lower than the normal values of adults. The mean erythrocyte volume(fL), hemoglobin content(pg) and concentration(g/L )were 88.123±6.359, 30.004±2.809 and 339.980±11.865, respectively, which were normal values of adults. Fetal anemia was significantly improved and the prognosis was good after intrauterine blood transfusion. 【Conclusion】 The 0.7~0.8 hematocrit concentrated washed RBCs prepared by the new approach is consistent with the special blood requirements during fetal anaemia transfusion, meets the clinical treatment standards, and can be applied in clinical.
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Objective To study the effects of nano silver (Ag) and titanium dioxide (TiO2) on the content of nucleic acid in staphylococcus aureus in order to explore their antibacterial mechanisms.Methods After preparation of beef extract peptone liquid cultures,the effects of minimal inhibitory concentrations (MICs) of nano Ag and TiO2 on staphylococcus aureus strains were determined.With the 1/2 MICs nano Ag and TiO2,the contents of DNA and RNA macromolecules from staphylococcus aureus cultures were measured to determine the damage degree of staphylococcus aureus cell membranes by ultraviolet spectrophotometer,and then the fluorescence intensities of the staphylococcus aureus cells were observed under fluorescence microscope and the fluorescence values were tested by fluorescence spectrophotometer to determine the contents of nucleic acid DNA and RNA.Results The MICs of nano Ag and TiO2 were 1.6 mg/mL and 5.781 μg/mL.After treatment with the 1/2 MICs nano Ag and TiO2,nano Ag group and TiO2 group were compared with the control group (culture fluid without adding antibacterial agent),respectively,and there were no significant differences in the contents of DNA and RNA macromolecules from staphylococcus aureus cultures between n anoAg group and control group as well as between TiO2 group and control group were (P＞0.05),and there were significant decreases in fluorescence intensities and the contents of nucleic acid DNA and RNA (P＜0.01).Conclusions Nano Ag and TiO2 had obvious antibacterial effects on staphylococcus aureus and the antibacterial properties of nano Ag was stronger than that of TiO2.The antibacterial mechanisms of nano Ag and TiO2 against staphylococcus aureus may be associated with the inhibition of the synthesis of nucleic acid DNA and RNA,inhibiting protein synthesis and then bacterial growth.
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Objective To explore the distribution characteristics and regularity of traditional Chinese medical (TCM) syndromes in patients with sepsis in Department of Emergency of our hospital by enalyzed their clinical data and TCM four clinical diagnostic information so as to provide the basis for TCM standardized diagnosis and treatment of sepsis. Methods From July 2016 to October 2017, 135 patients with sepsis were admitted to the Department of Emergency and Department of Emergency Intensive Care Unit (EICU) of the First Affiliated Hospital of Zhejiang Chinese Medical University, 110 cases in sepsis group, 25 cases in sepsis shock group. An unified questionnaire was developed to collect the patients' general data, infection site and TCM four clinical diagnostic information (TCM syndromes, tongue coating, pulse signs, etc.) for dialectical typing on the day of admission with definite diagnosis, the relevant laboratory examinations were completed within 24 hours after the confirmative diagnosis was made, and the quick sequential organ failure assessment (qSOFA) and SOFA scores were calculated. Results In 135 cases of sepsis, pulmonary infection (51.9%) was the main one, followed by abdominal infection (25.9%). The distribution of TCM syndromes: the toxic heat syndrome was the main syndrome in sepsis group (61.8%) and acute deficiency syndrome was the main syndrome in sepsis shock group (68.0%), the difference between the two groups being statistically significant (P < 0.001). There were no statistical significant differences in comparisons of infection related indicators between sepsis and septic shock groups, different TCM syndromes of sepsis (all P > 0.05), such as white blood cell count (WBC), percentage and absolute value of neutrophils, C-reactive protein (CRP), procalcitonin (PCT). the lactic acid in patients of the acute deficiency syndrome was significantly higher than those in patients of the toxic heat syndrome, the stoppage of the qi of the bowels syndrome and blood stasis syndrome [mmol/L: 2.8 (1.5, 4.2) vs. 1.3 (1.0, 1.8), 1.6 (1.3, 3.8), 1.6 (1.2, 2.9), P < 0.001], and in septic shock group was significantly higher than that in the sepsis group [mmol/L: 4.0 (2.7, 5.7) vs. 1.4 (1.1, 1.9), P = 0.000]. The rate of qSOFA ≥ 2 score was 25.5% (28/110) in sepsis group, and 80.0% (20/25) in sepsis shock group, the difference being statistically significant (P < 0.001); while the rate of qSOFA ≥ 2 score was 69.4% (25/36) in patients of acute deficiency syndrome, 42.1% (8/19) in patients of the stoppage of the qi of the bowels syndrome, 19.1% (13/68) in patients of toxic heat syndrome and 16.7% (2/12) in patients of blood stasis syndrome, the differences also being statistically significant (all P < 0.001). The scores of SOFA in septic shock group [7.0 (5.0, 10.0)] and acute deficiency syndrome group [6.0 (4.0, 9.0)] were significantly higher compared with those in sepsis group [3.0 (2.0, 4.0)] and other syndrome types patients [toxic heat syndrome 3.0 (2.0, 4.0), the stoppage of the qi of the bowels syndrome 4.0 (2.0, 6.0) and blood stasis syndrome 4.5 (3.0, 5.0)], the differences being statistically significant (all P < 0.001). Conclusions The distribution of TCM syndromes of sepsis is related to the severity degree of sepsis, in TCM dialectical typing of sepsis, from toxic heat syndrome developing into the stoppage of the qi of the bowels syndrome, and from blood stasis syndrome to acute deficiency syndrome, the SOFA score and lactic acid level were gradually increased as the disease condition was continuously aggravating, so the SOFA score and lactic acid could be used as the reference indicators for the severity degree of sepsis; in septic patients with different TCM syndromes, the rates of qSOFA ≥ 2 were different, and the qSOFA score combined with patient's TCM syndrome can enhance the early diagnosis of sepsis.
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Objective · To investigate the clinical characteristics of initial peritoneal dialysis (PD) patients with different peritoneal transport status, and analyze risk factors of high peritoneal transport status in PD patients. Methods · A total of 455 consecutive PD patients newly starting PD between January 2007 to October 2015 were retrospectively analyzed. According to the results of the first sPET, patients were divided into H/HA (4h D/Pcr ≥ 0.65) and L/ LA (4h D/Pcr<0.65) groups. Clinical and biochemical characteristics between the two groups were compared. Multivariate logistic regression model was established to investigate risk factors of higher peritoneal transport status of incident PD patients. Results · The study included 372 incident PD patients. The L/LA group and H/HA group had 264 cases (71.2%) and 108 cases (28.8%) respectively. The H/HA group had higher proportion of male patients (63.0% vs 50.8%, P=0.03), lower residual renal function [RRF, (4.26±2.77) mL/min vs (5.79±4.53) mL/min, P<0.01], lower serum albumin level [(29.34±6.89) g/L vs (32.08±5.86) g/L, P=0.00], and more frequent diabetic nephropathy (19.4% vs 9.5%, P=0.00), compared with L/LA group. Univariate and multivariate logistic regression analysis showed that higher peritoneal transport status was associated with lower serum albumin level (OR=0.96, 95% CI 0.28-0.99; P=0.02), male (OR=1.92, 95% CI 1.19-3.12; P=0.00), presence of diabetic nephropathy (OR=2.52, 95% CI 1.26-5.05; P=0.00) and lower residual renal function (OR=0.90,95% CI 0.83-0.96; P=0.00). The level of hsCRP in patients with hypoalbuminemia was higher than that in patients with normal albumin level (1.69 mg/L vs 0.69 mg/L, P=0.00). Conclusion · Low and low average peritoneal transport status accounted for the majority of the patients in this study. Low serum albumin levels, male, diabetic nephropathy, RRF were risk factors of initial high peritoneal solute transport status. Chronic inflammatory status might partially explain for the correlation between hypoalbuminemia and high peritoneal solute transport status in PD patients.
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Objective To establish and evaluate the animal model induced by inhalation injury of airborne fine particulate matter (PM2?5). Methods We manufactured equipment for rats aerosol inhalation with PM2?5. The effects of several facters such as concentrations(100 ± 10 μg/m3、150 ± 10 μg/m3、200 ± 10 μg/m3 )、time(1w、2w、4w、8w、12w)、method (non?exposed intratracheal instillation method and aerosol inhalation) and animals (Wistar rats, BN rats and guinea pigs) were investigated to establish the model. The respiratory rate, forced vital capacity ratio of forced expiratory volume ( FEV1/FVC) and arterial partial pressure of oxygen ( PO2 ) were measured, the pathological changes of bronchial and lung tissues under light microscope were observed. The success animal model was builded as the pneumonia was observed from the pathological changes of lung tissue. Results The Wistar rats exposed to PM2?5 aerosol inhalation for 8 weeks, we can see that the weight growth rate of rat decreased, WBC count and mononuclear cells count increased, the macrophages ratio decreased in BALF, the respiratory rate of lung increased while arterial PO2 and FEV1/FVC decreased, inflammation and pulmonary fibrosis changes were observed by bronch and pulmonary pathology, inflammatory changes with a dose?response relationship were observed. Exposed to PM2?5 aerosol inhalation for different time(1 w、2 w、4 w、8 w、12 w)with same dose, the score issue lesions of lung and bronchus in Wistar rats increased and the 8w group is obvious. The Wistar rats exposed to PM2?5 with different method ( aerosol inhalation and non?exposed intratracheal instillation method) for 8w, the aerosol inhalation worked as effectively as perfusion while mortality rate of aerosol inhalation is lower. Different animals ( Wistar rats, BN rats and guinea pigs) exposed to PM2?5 aerosol inhalation for 8w, the same results were observed with three method respectively while mortality rate of Wistar rats lower. Conclusions The optional conditions that the Wistar rats were continuously inhaled for 8w PM2?5 with a dose of 150 ± 10 μg/m3 were established. The animal model could be used on a national scale, especially in Fujian province. The results would be useful for the development of the research of the prevention and countermeasures of PM2?5 pollution.
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Objective To investigate the expressions of toll-like receptor 4 mRNA and nuclear factor-κB (TLR4-NF-κB) mRNA in lung tissue of rats with acute paraquat poisoning.Methods Thirty male SD rats were randomly divided into two groups,namely normal saline group (NS group,n =6) and the PQ groups (n =24).The rats of PQ group were administered with 20 mg/kg PQ by intraperitoneal injection to establish the models of PQ induced lung injury.The saline was administered once instead in normal saline group.The rats of PQ group were sacrificed separately at 6 h,12 h,24 h,48 h and 72 hours after modeling,while at 6 hours the rats of normal saline group was sacrificed.The expressions of TLR4 mRNA,NF-κB mRNA,and the levels of tumor necrosis factor-α and interleukin-6 in lung (serum) of rats were detected.Meanwhile,pathological changes of the lung tissue were examined under optical microscope.Results There were no histopathological changes such as alveolar edema,hemorrhage and inflammatory cell infiltration found in NS group other than in PQ group.At the 72 h,the expressions of TLR4 mRNA (9.61 ±0.21),NF-κB mRNA (5.62 ± 0.24),and the levels of TNF-α (153.08 ± 5.02) pg/ml,and interleukin-6 (230.08 ± 10.64) pg/mL in lung tissue of rats were significantly higher in PQ group than those in control group (P ＜ 0.01).Conclusions In rats after PQ poisoning,the expressions of TLR4 mRNA,NF-κB mRNA,and the levels of TNF-αand IL-6 were higher than those in normal rats,and the TLR4-NF-κB pathway could play an important role in lung injury of rats with PQ poisoning.
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ObjectiveTo study the effects of Tanreqing injectio (a Chinese herb preparation acts as an anti-inflammatory agent to eliminate the pulmonary infection) on inflammatory cytokines of rats with acute lung injury (ALI). MethodsFifty-six clean grade healthy male SD rats were randomly (random number) divided into three groups: normal group, model group and treatment group. Rats in the model group and treatment group were injected with lipopolysaccharide (LPS) into tail vein. Rats in treatment group were treated with Tanreqing injection one hour after LPS injection. The observing intervals were respectively set in 2 h, 4 h and 6 h. At each observing interval, TNF-α, IL-1 β and IL-8 in brochoalveolar lavage fluid (BALF) were detected by radioimmunoassay, and the ratio of polymorphonuclear neutrophiles (ωPMN) in BALF were calculated by Wright-Giermsa staining, as well as to observe the pathological changes of lungs and to examine the lung wet/dry weight ratio (W/D). Data were analyzed with SPSS version 17.0 software. ResultsAt 2, 4 and 6 h intervals, TNF-α, IL-1β, IL-8 and ωPMN in BALF were significantly higher in model group than those in normal group (P ＜0. 05 or P ＜0. 01 ), the lung W/D in model group were obviously higher than those in normal group ( P ＜ 0. 01 ), and the pathological injury of lung tissue in model group were severe. At each observing interval, compared with model group,TNF-o, IL-1 β, IL-8 and oPMN in BALF were significantly reduced in treatment group ( P ＜ 0. 05 or P ＜0.01 ), the lung W/D in treatment group were obviously decreased ( P ＜0.01 ), and the lung injury were attenuated in treatment group. ConclusionsTanreqing injection could provide partly protection in rats with ALI by inhibiting inflammatory factor.
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Objective To compare the efficacy between the two-cuff swan neck catheter and the Tenckhoff catheter in continuous ambulatory peritoneal dialysis (CAPD) patients prospectively. Methods One hundred and ten patients with end-stage renal disease (ESRD) were selected as candidates, who received catheter implantation and CAPD therapy for the first time. Patients were divided into group A (swan neck catheter group) and group B (Tenckhoff catheter group), 55 patients for each group. Catheters of beth groups had a straight end and were implanted by routine surgical procedure. One-year follow-up was performed and information was recorded such as complications, survival time, quit of dialysis, death, etc. Survival analysis was carried out by Kaplan-Meier method and Log-Rank tests. Results At the end of follow-up, 17 patients died, 3 received renal transplantation, 8 were transferred to hemodialysis, 3 went to other hospitals, and 79 patients (71.8%) remained in our department for CAPD. Twenty-six patients of both groups had peritonitis with a total of 35 occurrences. The total incidence of peritonitis was 0.32 times/patient year, with the detailed figure of 0.35 times/patient year for group A and 0.29 times/patient year for group B respectively (P0.05). The time interval between the catheter implanting and the onset of peritonitis was (30±29) weeks and (29±24) weeks for group A and group B respectively (P0.05). The risk of developing peritonitis in both groups was 26.97% within 1 year. Tunnel infection occurred in 2 patients and exit-site infections in 9 patients of two groups. The incidence of tunnel plus exit-site infections was 0.1 times/patient year. Incidence of tunnel infection and the exit-site infection for group A was lower than that of group B (0 vs 0.036 times/patient year and 0.06 times/patient year vs 0.11 times/patient year respectively). However, the difference was not significant (P0.05). Mechanical complications of catheter (catheter migration, omcntum wrapping, leakage of peritoneal dialysates, slip out of outer cuff), incidence of inguinal hernia and bellyache between two groups were not significantly different (P0.05). There were 4 cases of catheter drawing in each group. Both two groups had the same 12-month technical survival rate as 92.73%. Of 17 dead cases, 7 were in group A and 10 in group B (P0.05). The main death causes were cardiocerebral events (47.1%) and infections (23.5%). The 12-month survival rate was 86.34% for group A and 80.68% for group B (P0.05). Conclusions There are no significant differences of infection, mechanical complications, technical survival rate and patients' survival rate between two groups. The efficacy of swan-neck catheter is similar to Tenckhoff catheter in CAPD patients.
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0.05).CONCLUSION:The mutagenesis of Leflunomide 3-methyl-isomer was not observed in these tests.