First-aid knowledge regarding small area burns in children among 5814 caregivers: A questionnaire analysis.

BACKGROUND: To assess caregivers'knowledge of first aid for small-area thermal burns in children, and reduce burns-induced morbidity and damage in children. METHODS: The multi-stage cluster random sampling method was used to recruit school-age children from different kinds of schools. For each child, we selected only one caregiver as our study participant. First-aid knowledge regarding small area burns in children and choices of medical treatment were investigated in the manner of questionnaires. RESULTS: The effective response rate of questionnaire was 99.4% (5814/5850). Folk remedies and daily necessities were chosen by 17.8% (1,036/5814) and 48.9% (2841/5814), respectively. 39.8% (2,312/5814) of caregivers knew all standard burn first aid measures. Moreover, the proportion of knowing all five measures among caregivers with undergraduate education was significantly higher than the figures among those with other educational levels. CONCLUSIONS: Child caregivers had poor knowledge of first aid for small area burns in children. Only a few caregivers knew all five standard first aid measures for managing small area burns. Many non-scientific and inappropriate home remedies are still widely applied among Shanghai citizens. Our study results suggest relevant scientific evidence-informed measures should be more widely disseminated to the citizens.

Correlation study of abdominal aortic calcification and serum cell division cycle 42 in maintenance hemodialysis patients / 中国综合临床

Objective:To explore the correlation between abdominal aortic calcification and serum cell division cycle 42 (CDC-42) in maintenance hemodialysis (MHD) patients, and to explore the influencing factors of them.Methods:A cross-sectional study was conducted in the Blood Purification Center of Qingdao Municipal Hospital,112 patients who underwent MHD for more than 6 months from October 2019 to March 2021 were selected. The abdominal aortic calcification score (ACCs) was calculated by reference to the abdominal lateral X flat tablets. According to AACS, 50 cases were divided into no and mild calcification group (0≤AACS<5 points) and 62 cases were divided into moderate and severe calcification group (AACS≥5 points). The level of serum CDC-42 was detected by enzyme linked immunosorbent assay (ELISA). Taking the median serum CDC-42 level as the boundary, 56 cases were divided into low CDC-42 group and high CDC-42 group. Spearman correlation analysis was used to analyze the correlation between indicators. The risk factors of elevated CDC-42 and abdominal aortic calcification in MHD patients were explored by multivariate logistic regression analysis, and the variables were included by entry method.Results:In 112 patients, 91 cases (81.25%, 91/112) had abdominal aortic calcification, and the median serum CDC-42 level was 466.56 (335.56,623.57) ng/L. CDC-42, AACs, age, dialysis age, diabetic nephropathy, glycosylated hemoglobin, alkaline phosphatase, parathormone and calcium in the no and mild calcification groups were 347.77 (291.20, 419.53) ng/L, 1.00 (0.00, 3.00) points, (57.18±6.25) years, 31.50 (15.00, 49.25) months, 34.00%(17/50), (6.63±0.97)%, 116.22 (87.32, 152.13) U/L, 258.57 (143.40, 433.31) ng/L, (2.18±0.26) mmol/L, and in the moderate to severe calcification group were 602.69 (489.61, 762.73) ng/L, 10.00 (7.00, 16.25) points, (60.81±7.12) years, 49.00 (18.00, 67.00) months, 53.23%(33/62), (7.07±1.20)%, 144.34 (99.71, 201.76) U/L, 336.57 (230.63, 506.00) ng/L,(2.28±0.26) mmol/L, with statistically significant differences between the two groups(The statistical values were 6.99, 9.11, 2.83, 2.45, 4.14, 2.08, 2.04, 2.16 and 1.99, respectively, all P<0.05). CDC-42, AACs, glycosylated hemoglobin and parathormone in the low CDC-42 group were 336.50 (295.10, 395.25) ng/L, 2.00 (0.00, 4.00) points, (6.62±1.06) %, 250.60 (140.20, 462.02) ng/L,and in the high CDC-42 group were 622.92 (558.11, 836.65) ng/L, 10.00 (6.25, 15.75) points, (7.13±1.13) %, 347.21 (240.40,501.20) ng/L, with statistically significant differences between the two groups (The statistical values are 6.51, 5.21, 2.43 and 2.54, respectively,all P<0.05). Abdominal aortic calcification has positive correlations with CDC-42 ( r s=0.704, P<0.001), age ( r s=0.308, P=0.001), dialysis years ( r s=0.198, P=0.036), glycosylated hemoglobin ( r s=0.358, P<0.001), alkaline phosphatase ( r s=0.187, P=0.048), parathormone ( r s=0.437, P<0.001), serum calciu m( r s=0.323, P=0.001) and serum phospho-rus ( r s=0.251, P=0.007), and negative correlation with serum albumin( r s=-0.276, P=0.003). This study has confirmed that high serum CDC-42 ( OR=1.010, 95%CI:1.004-1.016, P=0.001) and senior dialysis age ( OR=1.033, 95%CI:1.006-1.061, P=0.018) were independent risk factors for moderate to severe abdominal aortic calcification.Serum CDC-42 levels has positive correlation with AACs ( r s=0.704, P<0.001), age ( r s=0.240, P=0.011), dialysis age ( r s=0.191, P=0.044), glycosylated hemoglobin ( r s=0.350, P<0.001), parathormone ( r s=0.380, P<0.001) and serum calcium ( r s=0.235, P=0.013). This study learned that,high AACs ( OR=1.185, 95%CI:1.037-1.354, P=0.013) and high parathormone ( OR=1.005, 95%CI:1.001-1.009, P=0.009) were independent risk factors for high CDC-42. The area under the receiver operating characteristic curve (ROC-AUC) of serum CDC-42 in predicting moderate and severe abdominal aortic calcification in MHD patients was 0.885. When the cut-off point was 466.56 ng/L, the predictive sensitivity and specificity were 79% and 86% respectively. Conclusion:The degree of abdominal aortic calcification in MHD patients was positively correlated with the level of serum CDC-42. High serum CDC-42 and high dialysis age were independent risk factors for abdominal aortic calcification in MHD patients. High AACS and high parathyroid hormone were independent risk factors for the increase of serum CDC-42 in MHD patients .

Application and anaylsis of discussion class in the teaching of Cellular and Molecular Basis of Medicine for undergraduates / 中华医学教育探索杂志

Cellular and Molecular Basis of Medicine is a basic module course newly established by our school that is compulsory for medical students. This module course overthrows traditional disciplinary boundaries, and adopts the forms of combining classroom teaching with students' self-learning and teachers' instruction with topic discussion of students guided by teachers. In the teaching of the module course, discussion was adopted among students which involves teachers giving out the range of topics to students so that they can prepare for the topic of their intertest. After group discussion during class, the head of the teaching group gave comment on students' discussion and prize for whom had the best performance. Then, students were asked to summarize and analyze the questions raised during discussion after class. In conclusion, discussion class has stimulated students' interest in learning, improved their ability to think independently and encouraged them to demonstrate their abilities, which has achieved good teaching outcomes.

Relationship between tea drinking habit and postoperative delirium in elderly patients / 中华麻醉学杂志

Objective:To evaluate the relationship between the tea drinking habit and postoperative delirium (POD) in elderly patients.Methods:Two hundred and ninety-two patients, aged 65-85 yr, weighing 50-80 kg, of American Society of Anesthesiologists physical status Ⅰ-Ⅲ, undergoing elective knee/hip arthroplasty under spinal-epidural anesthesia in our hospital, were enrolled in this study.The patient′s cognitive function was assessed using Mini-Mental State Examination at 1 day before operation.Peripheral venous blood samples were collected before anesthesia, and the concentrations of caffeine and tea polyphenols in plasma were measured by enzyme-linked immunosorbent assay.In the anesthesia recovery room after operation and at 1, 3 and 7 days after operation (or before discharge), neuropsychological tests were performed, and the Delirium Rating Scale was used to recognize POD developed.The patients were divided into POD group (P group) and non-POD group (NP group) according to whether POD occurred after operation.Logistic regression analysis was used to analyze the variables of which P values were less than 0.05. Results:There was no significant difference in age, American Society of Anesthesiologists physical status, concentrations of caffeine and tea polyphenols in plasma between P group and NP group ( P<0.05). The results of logistic regression analysis showed that age was an independent risk factor for POD, and concentrations of caffeine and tea polyphenols in plasma and tea drinking habits were protective factors for reducing the occurrence of POD in elderly patients. Conclusion:Tea drinking habit is a protective factor for reducing the occurrence of POD in elderly patients.

Relationship between cholinergic biomarkers and postoperative delirium in elderly patients / 中华麻醉学杂志

Objective:To evaluate the relationship between cholinergic biomarkers and postoperative delirium (POD) in elderly patients.Methods:The patients, aged 65-85 yr, weighing 50-80 kg, of American Society of Anesthesiologists physical status Ⅰ-Ⅲ, underwent total knee/hip arthroplasty under combined spinal-epidural block in our hospital from July 2018 to September 2019, were collected.The baseline clinical data of patients were collected, and cubital venous blood samples 5 ml were collected before anesthesia to detect plasma concentrations of choline acetyltransferase (ChAT), acetylcholinesterase (AChE), butyrylcholinesterase (BuChE), tumor necrosis factor-α (TNF-α), and interleukin-6 (IL-6). The neuropsychological testing was performed on 1 day before operation, following admission to the recovery room after surgery, and on 1, 3 and 7 days (or before discharge) after surgery.The patient′s cognitive function was assessed using Mini-Mental State Examination (MMSE) before surgery.Confusion Assessment Method and Memorial Delirium Assessment Scale were used to evaluate the occurrence of postoperative delirium (POD) after surgery.The patients were divided into POD group (P group) and non-POD group (NP group) according to whether POD occurred.Logistic regression was used to analyze the related risk factors for POD.Results:There were 349 cases in NP group and 57 cases in P group, and the incidence of POD was 14.0%.Compared with NP group, the age of patients, preoperative coexisting underlying diseases (≥3 types), plasma ChAT, TNF-α and IL-6 concentrations were increased, and plasma AChE and BuChE concentrations were decreased in P group ( P<0.05). The results of multivariate logistic regression analysis showed that changes in plasma AChE, BuChE, and ChAT concentrations and older age were independent risk factors for POD ( P<0.05). Conclusion:The development of POD is related to the preoperative changes in plasma AChE, BuChE and ChAT concentrations in elderly patients.

Expression of integrin α5 in cervical cancer and its significance / 肿瘤研究与临床

Objective To investigate the expression of integrin α5 in cervical cancer, and to explore its relationship with clinicopathological characteristics of patients with cervical cancer. Methods Immunohistochemistry was used to detect the expression of integrin α 5 in cervical cancer tissues of 60 cases and normal cervical paraffin-embeded tissues of 20 cases of benign uterine lesions undergoing hysterectomy from Qingdao Municipal Hospital between January 2014 and December 2017. Real-time quantitative polymerase chain reaction (RT-PCR) was used to detect the mRNA expression level of integrin α5 in 20 fresh cervical cancer tissues and 20 normal cervical tissues collected from benign cervical lesions in Qingdao Municipal Hospital between January 2018 and July 2018. The relationship between the expression of integrinα5 and the clinicopathological characteristics of patients with cervical cancer was analyzed. Results The positive expression rate of integrin α5 protein in cervical cancer and normal cervical tissues was 63.3％(38/60), 35.0％(7/20), respectively, and the difference was statistically significant (χ2=4.893, P<0.05). The expression of integrin α5 mRNA in cervical cancer was 1.6 ±0.4 times as high as that in normal cervical tissues (t= 5.529, P< 0.01). The positive expression of integrin α5 protein was associated with lymph node metastasis in cervical cancer patients (Z= -2.636, P= 0.008). Conclusion The high expression of integrinα5 is related to lymph node metastasis of cervical cancer, and integrin α5 may be a new potential target for treatment of cervical cancer.

Expression of integrin α5 in cervical cancer and its significance / 肿瘤研究与临床

Objective@#To investigate the expression of integrin α5 in cervical cancer, and to explore its relationship with clinicopathological characteristics of patients with cervical cancer.@*Methods@#Immunohistochemistry was used to detect the expression of integrin α 5 in cervical cancer tissues of 60 cases and normal cervical paraffin-embeded tissues of 20 cases of benign uterine lesions undergoing hysterectomy from Qingdao Municipal Hospital between January 2014 and December 2017. Real-time quantitative polymerase chain reaction (RT-PCR) was used to detect the mRNA expression level of integrin α5 in 20 fresh cervical cancer tissues and 20 normal cervical tissues collected from benign cervical lesions in Qingdao Municipal Hospital between January 2018 and July 2018. The relationship between the expression of integrin α5 and the clinicopathological characteristics of patients with cervical cancer was analyzed.@*Results@#The positive expression rate of integrin α5 protein in cervical cancer and normal cervical tissues was 63.3% (38/60), 35.0% (7/20), respectively, and the difference was statistically significant (χ 2 = 4.893, P < 0.05). The expression of integrin α5 mRNA in cervical cancer was 1.6±0.4 times as high as that in normal cervical tissues (t = 5.529, P < 0.01). The positive expression of integrin α5 protein was associated with lymph node metastasis in cervical cancer patients (Z = -2.636, P = 0.008).@*Conclusion@#The high expression of integrin α5 is related to lymph node metastasis of cervical cancer, and integrin α5 may be a new potential target for treatment of cervical cancer.

Preliminary results of magnetic resonance angiography of ophthalmic artery in diabetic retinopathy / 中华眼底病杂志

Objective To observe the characteristics of magnetic resonance angiography of(MRA) ophthalmic artery in patients with diabetic retinopathy (DR).Methods A total of 36 eyes of DR patients (DR group) diagnosed by clinical examination were included in the study.Among them,there were 42 eyes in 21 males and 15 eyes in 15 females.The average age was 55.2 years old.The average duration of diabetes was 7.56 years.All eyes were examined by MRA and fluorescein fundus angiography (FFA) in the ophthalmic artery.At the same time,24 eyes of 12 patients were examined by computed tomography angiography (CTA).Twenty-two healthy volunteers with age and gender matching were selected as the control group.Among them,there were 13 males and 9 females.All patients underwent MRA examination of the ophthalmic artery;at the same time,5 eyes of 5 eyes were examined by CTA.MRA and CTA were classified into three grades according to the development condition and shape change of the ophthalmic artery.0 grade:no abnormality;grade Ⅰ:mild lesion;grade Ⅱ:obvious lesion.According to the results of FFA examination,it was divided into no obvious disease stage,background stage,proliferative stage,proliferative stage.The morphological features of the MRA of the ophthalmic artery in the DR group and the control group were compared.The relationship between the MRA grading of the ophthalmic artery and the FFA staging was observed in the DR group.The consistency analysis between the MRA and CTA grades of the ophthalmic artery in the DR group was performed by Kappa test;the relationship between the MRA grade and the FFA staging of the ophthalmic artery was analyzed by Spearson correlation analysis of the same data with two-way ordered attributes.Results In 44 eyes of the control group,the MRA in grade 0 and Ⅰ of the ophthalmic artery were 41 and 3 eyes,respectively;all eyes of the CTA examination of the ophthalmic artery were grade 0.In 72 eyes of the DR group,the MRA in grade 0,Ⅰ,and Ⅱ of the ophthalmic artery were 28,28,and 16 eyes,respectively.Among the 24 eyes examined by CTA,there were 13,6,and 5 eyes in grade 0,Ⅰ,and Ⅱ,respectively.In the DR group,the classification of MRA and CTA of the ophthalmic artery was highly consistent (Kappa value =0.86).There were significant differences in the number of eyes with different grades of MRA in the DR group and the control group (Z=-5.74,P=0.000).In 72 eyes of the DR group,there were 8,12,22,and 30 eyes in no obvious disease stage,background stage,proliferative stage,and proliferative stage,respectively.Correlation analysis showed that there was a significant correlation between MRA grading and FFA staging in the DR group (r=0.405,P=0.000).Conclusions MRA can show the changes of ophthalmic artery morphology and reflect DR staging to a certain extent.It has a high consistency with FFA vascular changes.

Reduced field-of-view diffusion tensor imaging together with optical coherence tomography in detecting alterations of retinal ganglion cell axons in patients with retinitis pigmentosa / 中华放射学杂志

Objective To investigate the damage of retinal ganglion cell (RGC) axons in retinitis pigmentosa (RP) quantitatively by using reduced-filed-of-view DTI (rfov-DTI) together with optical coherence tomography(OCT).Methods Thirty four patients(68 eyes,Patient group)and 33 healthy controls (66 eyes, Control group) were enrolled in this study. Measures of rfov-DTI and OCT of both eyes in all subjects were performed by 3.0 MRI. The difference of fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (λ//) and radial diffusivity (λ⊥) were compared by two independent sample t test. The peripapillary retinal nerve fiber layer (RNFL) thickness in temporal and lateral nose, which data don't conform to normal distribution, were calculated by average and four quadrants and compared by Mann-Whitney U test,the average RNFL thickness and RNFL thickness in low quadrant and upper quadrant were compared by two independent sample t test.Spearman rank were performed to determine the correlation between DTI parameters of optic nerves (ONs) and RNFL thickness. Results The value of FA, MD, λ//, λ⊥, average, temporalside, nasal side, low quadrant and upper quadrant RNFL thickness in patient group were 0.445±0.078,(1.330±0.236)×10-3mm2/s,(5.502±0.263)×10-3mm2/s,(4.494±0.238)×10-3mm2/s,(104.7± 25.4)μm,(104.0±31.0)μm,(65.0±25.0)μm,(122.0±33.3)μm,and(117.4±37.7)μm respectively and the data in control group were 0.581±0.043,(1.079±0.146)×10-3mm2/s,(5.349±0.214)×10-3mm2/s,(4.195±0.126)× 10-3mm2/s, (101.2 ± 10.6)μm, (70.0 ± 10.8)μm, (81.3 ± 13.4)μm, (127.3 ± 12.5)μm, (126.3 ± 11.5)μm respectively.Compared with the control group,the value of MD,λ//,λ⊥were significantly higher but FA was significantly lower (t=-12.388, 7.394, 3.695, 9.062;all P<0.01). The temporal RNFL was significantly thicker while the nasal RNFL was much thinner than that in control group respectively(Z=-8.384,-4.518;all P<0.01);the average, low quadrant and upper quadrant RNFL thickness showed no significant differences compared with the control group(t=-1.217,-1.843, 1.049;P=0.227, 0.069, 0.297).Especially,there was a weak correlation between the temporal RNFL thickness and FA(r=0.268,P=0.029),however,no correlation of nasal RNFL thickness with mean FA was found(r=0.164,P=0.186). Conclusions rFOV-DTI together with OCT can provide information about the pathology of RGC axon disease in patients with RP.there is a weak correlation between the retinal nerve fiber layer and the pathological changes of optic nerve in the retinal ganglion cells,but the performance were not coincident.

Relationship between triggering receptor expressed on myeloid cells and postoperative cognitive dysfunction in elderly patients / 中华麻醉学杂志

Objective To evaluate the relationship between the triggering receptor expressed on myeloid cells (TREM) and postoperative cognitive dysfunction (POCD) in elderly patients.Methods Eighty American Society of Anesthesiologists physical status Ⅰ-Ⅲ patients,aged 65-85 yr,weighing 50-80 kg,scheduled for elective total knee replacement under spinal-epidural anesthesia were enrolled in this study.Cerebrospinal fluid (CSF) was extracted after a catheter was successfully inserted into subarachnoid space.Blood samples from the cubital vein was collected before anesthesia induction (T0) and at 24 and 72 h after surgery (T1,2).The concentrations of TREM1 and TREM2 in CSF and plasma and tumor necrosis factor-alpha (TNF-α) and interleukin-6 (IL-6) in plasma were measured by enzyme-linked immunosorbent assay.The expression of TREM1,TREM2,IL-6 and TNF-α protein and mRNA in mononuclear ceils in peripheral blood was detected using real-time polymerase chain reaction.Neuropsychological test was performed in the the same time period at 1 day before surgery and 7 days after surgery,and the Z score was used to diagnose the development of POCD.The patients were divided into POCD group (P group) and non-POCD group (NP group) according to whether or not POCD happened after surgery.Results The incidence of POCD was 22％.Compared with group NP,the plasma TREM1 concentrations at T1,2 and plasma IL-6 and TNF-α concentrations at T2 were significantly increased,and the expression of TREM1 mRNA and TNF-α mRNA at T1,2 and IL-6 mRNA at T2 was up-regulated in group P (P＜0.05).There was no significant difference in plasma TREM2 concentrations at each time point between and within groups (P＞0.05).There was a higher consistency between plasma and CSF TREM1 concentrations (Cronbach's Alpha=0.784,P＜ 0.01) and a high consistency between plasma and CSF TREM2 (Cronbach's Alpha =0.935,P＜0.01).Conclusion Up-regulated expression of central and peripheral TREM1 is related to the development of POCD in elderly patients.

Correlation between sleep quality and anxiety in CKD patients / 现代临床护理

Objective To study the correlation between sleep quality and anxiety in patients with chronic kidney diseases (CKD).Method Toally 118 patients with CKD were investigated with Pittsburgh sleep quality index (PSQI) and self-rating anxiety scale (SAS).Results About 75.42％ (89/118) patients had poor quality of sleep.The scores by PSQI and the dimensions were higher than those of the norms (all P＜0.05),but the total scores by PSQI and the factors of sleep quality,time of falling sleep,duration of sleep,use of hypnosis drugs were all significantly lower than those of the insomnia group (all P＜0.01).35.59％ (42/118) of the patients had anxiety and the score of SAS was significantly higher than that of the national norm (P＜0.01).The total scores of PSQI,sleep quality,sleep time,sleeping time,sleep disorder,daytime function were positively related to the score of SAS (P＜0.01).Conclusions The quality of sleep is poor in the CKD patients and there is a positive correlation between the quality of sleep and the anxiety.It is necessary to strengthen the knowledge-related health education and to provide emotional support and individualized nursing services for CKD patients so as to relieve their anxiety and improve their sleep quality.

MR diffusion tensor imaging of optic radiation in chronic Leber's hereditary optic neuropathy / 中华放射学杂志

Objective To observe quantitatively the optic radiation alterations in chronic Leber's hereditary optic neuropathy (LHON) using MR diffusion tensor imaging at 3.0 T.Methods Twenty-five patients with chronic LHON and twenty-eight sex-and age-matched disease-free control subjects wereenrolled from March 2011 to December 2014.The whole brain DTI examination and retinal opticalcoherence tomography were performed in all the subjects.The parameters values of optic radiation includingfractional anisotropy(FA),mean diffusivity(MD),principal eigenvalue(λ//),orthogonal eigenvalue(λ⊥) and average retinal nerve fiber layer (RNFL) thickness and temporal retinal nerve fiber layer(RNFL) thickness were measured.For DTI and OCT parameters,differences between patients and controls and differences right and left of the patient group were evaluated using independent-samples t test and paired t test respectively.Results In LHON patients,the DEC maps showed that the bilateral optic radiation fibers were obviously sparse and slender.The values of FA,MD,λ// and λ⊥ in the right optic radiation were 0.523±0.050,(0.903±0.061) × 10-9 mm2/s,(4.999 ±-0.097) × 10-9 mm2/s and (4.126-± 0.065) × 10-9 mm2/s respectively,and the corresponding values of left optic radiation were 0.537±0.041,(1.057±0.573)× 10-9 mm2/s,(5.052±0.119)×10-9 mm2/s and (4.138±0.072)×1009 mm2/s.Compared with optic radiation in the control group,the bilateral FA was significant reduced,the bilateral λ⊥ value and right MD value were significant increased (t=-6.524,-6.045,6.932,6.454,3.471,P＜0.05).However,there were no significant difference of the bilateral λ〃 and left MD (t=-0.457,1.221,1.833,P＞0.05).There were no significant differences in FA,MD,λ//and λ⊥ between the left and right eyes in LHON patients(P＞0.05).The values of average RNFL thickness and temporal RNFL thickness in right eyes were (59.36± 10.94) and (41.72±9.43) μm respectively,and the corresponding values of left eyes were (60.12±9.81),(44.72±9.43) μm.The average and temporal RNFL thickness were significantly thinned in LHON patients compared with the control group(t=-16.357,-10.398,-17.169,-9.672,P＜0.05).There was no significant difference in average RNFL thickness between the left and right eyes (t=0.959,P＞0.05),temporal RNFL thickness between the left and right eyes was statistically significant (t=2.645,P＜0.05).Conclusion The bilateral optic radiation had significant degeneration and atrophy in chronic LHON.

Pharmacokinetic study of salvianolic acid D after oral and intravenous administration in rats

A sensitive, specific and rapid LC-MS method was developed and validated for the determination of salvianolic acid D (SalD) in rat plasma. This method used a single quadrupole mass spectrometer with an electrospray ionization (ESI) source. A single ion monitoring scanning (SIM) mode was employed. It showed good linearity over the concentration range from 3.3 to 666.7 ng/mL for the determination of SalD. The R.S.D.% of intra-day and inter-day precision values were no more than 7.69%, and the accuracy was within 91%-104% at all quality control levels. This LC-MS method was applied to the pharmacokinetic study of SalD in rats. A two-compartmental model analysis was employed. The plasma concentrations at 2 min (C 2min) were 5756.06±719.61, 11,073.01±1783.46 and 21,077.58±5581.97 μg/L for 0.25, 0.5 and 1 mg/kg intravenous injection, respectively. The peak plasma concentration (C max) was 333.08±61.21 μg/L for 4 mg/kg oral administration. The area under curve (AUC0-t ) was 14,384.379±8443.184, 22,813.369±11,860.823, 46,406.122±27,592.645 and 8201.740±4711.961 μg/L·h for intravenous injection (0.25, 0.5 and 1 mg/kg) and oral administration (4 mg/kg), respectively. The bioavailability of SalD was calculated to be 4.159%±0.517%.

Punica granatum seed oil inhibits malignant behavior of breast cancer cells / 军事医学

Objective To study the effect of Punica granatum( pomegranate) see d oil( PSO) on proliferation and apop-tosis behaviors of breast cancer cells.Methods Fatty acid composition was detected by gas chromatography,breast cancer cells, MCF-7 and MDA-MB-231 were treated with PSO, cell proliferation was observed by MMT, cell apoptosis was analyzed by flow cytometry,and expression levels of proliferation and apoptosis-related proteins were detected by Western blot.Results Punicic acid (PA) was the major fatty acid in PSO(74.41%).PSO could inhibit the proliferation while in-ducing apoptosis in both cell lines in a dose-and time-dependent manner, significantly decrease the expression level of Cox-2 and Bcl-2, increase the expression level of Bax and caspase-3 (cleaved),remarkably upregulate the expression of P53 in MCF-7, and downregulate p53 expression in MDA-MB-231.Conclusion PA may be one of the functional ingredients of PSO which can inhibit proliferation and induce apoptosis in breast cancer cells.These effects are probably mediated by regu-lating the expression of Cox-2, Bcl-2, Bax, caspase-3 (cleaved) and p53.

Protective effect of Salvianolic acid A against isoproterenol-induced myocardial infarction in mice / 中国药理学通报

Aim To investigate the effect of Salvianol-ic acid A (Sal A)on mice with isoproterenol (ISO)-induced myocardial infraction and its possible mecha-nisms.Methods The mice were subcutaneously in-jected with ISO (8 mg·kg-1 )to induce myocardial in-farction.The myocardial protective effect of Salvianolic acid A was evaluated from mortality rate,electrocardio-gram (ECG),heart function,myocardial infarction in-dex,serum myocardial enzymes and its action mecha-nisms were explored from inflammation,anti-oxidation and cells apoptosis.Results Salvianolic acid A dose-dependently enhanced the heart function of myocardial infarction mice,reduced the heart index,inhibited the myocardial enzyme leakage,showed obvious myocardi-al protection effects.ELISA results showed that Salvi- anolic acid A could reduce the expression of myocardial inflammatory cytokines such as IL-6(interleukin-6,IL-6),TNF-α(tumornecrosis factor-α,TNF-α).West-ern-blotting confirmed that Salvianolic acid A could in-crease the expression of anti-apoptotic proteins Bcl-2, reduce the expression of apoptosis protein Bax,and raise the phosphorylation level of PI3K and Akt.Con-clusion Salvianolic acid A displays a significant pro-tective effect against isoproterenol-induced myocardial infarction and its mechanism may be related to the in-crease of PI3K/Akt signal pathway and the inhibition of cell apoptosis and inflammatory reaction.

Effect and mechanism of total flavonoids of bugloss on rats with myocardial ischemia and reperfusion injury / 药学学报

This study is to investigate the effect of total flavonoids of Uygur medicine bugloss (BTF) on rats with myocardial ischemia/reperfusion injury, and to explore the mechanisms by which it acts. Left anterior descending (LAD) coronary artery in rats was occluded for 30 min followed by 4 h reperfusion. Meanwhile, BTF dissolved in saline was administered intraperitoneally at dosage of 10, 30 and 50 mg x kg(-1). Electrocardiograph, infarction index, serum myocardial enzymes and heart function were determined to evaluate the effect of BTF. Some other observations were carried out to explore whether inhibiting inflammation and apoptosis is involved in the mechanisms underlying BTF. Our results showed that in ischemia/reperfusion injured rats BTF could dose-dependently reduce myocardial infarction index and myocardial enzyme leakage, and enhance heart function, indicating that it possesses significant cardio protection. ELISA analysis showed that BTF could decrease the content of myocardial inflammatory cytokines such as IL-1beta, IL-6 and TNF-alpha. Western-blotting confirmed that BTF could increase the expression of anti-apoptotic protein Bcl-2 and reduce the expression of proapoptosis protein Bax. Further more, the phosphorylation level of PI3K and Akt was upregulated by BTF treatment. BTF can protect rat against myocardial ischemia/reperfusion injury. Anti-inflammation and inhibition of apoptosis through upregulating PI3K/Akt signal pathway may contribute to the protective effect of BTF.

Analysis of dosimetry and clinical outcome using intensity modulated radiation therapy for early breast cancer patients after breast conservative surgery / 中华放射医学与防护杂志

Objective To analyze the dosimetfic benefits, clinical effect and side-respond of whole breast using intensity modulated radiotherapy for early breast cancer after conservative surgery. Methods From Oct.2004 to Aug. 2005,103 patients received the whole breast intensity modulated radiation therapy (IMRT). A dosimetric comparison of IMRT with conventional radiotherapy (CR) was performed on each patient. The cosmetic results, clinical effect and side-respond were observed. Results The average volume proportion of 95% and 107% prescribed dose was 95.8% ± 4.90% and 84.0% ± 20.7% (t = 9.60, P < 0.01) with IMRT and CR in clinical target volume, respectively. The V20 (lung volume of aceepted> 20 Gy/all lung volume × 100%) of the ipsilateral lung were 15.70% ± 4.64% and 23. 11% ± 7.88% (t = - 13.3, P < 0.01). The V30of the heart were 4.44% ±3.93% and 15.55% ± 10.89%(t = - 11.3, P< 0.01) with IMRT and CR respectively for sixty-three left side breast cancer patients. The 1- and 2-year excellent rate of good cosmetic outcome was both 100%. The 1-, 2- and 3-year local control rate was 99% ,99% and 98% ,respectively. The 1-, 2- and 3-year disease-free survival rate was 99% ,99% and 96% ,respectively. The Grade 1 and 2 acute radiation skin reaction rate was 95.1% and 4.9%, respectively. Conclusion Compared with conventional radiotherapy, IMRT improves dose distribution of CTV and reduce the dose of normal tissue around CTV;but with better clinical effects and lower side-respond for early breast cancer patients after breast conservative surgery.

Dosimetry study of intensity modulated radiation therapy for left side breast cancer / 中华放射肿瘤学杂志

Objective To compared intensity modulated radiation therapy (IMRT) with conventional radiotherapy(CR) for the left side breast cancer after breast-conserving surgery in regard to the homogeneity of dose in the target area, cardiac dose and irradiation volume in the target area. Methods Thirty-eight patients received inverse planning of IMRT with dynamic multi-leaf collimation (dMLC). Prescription dose was 46Gy in breast volume with X-ray, and added electron boost dose was 14Gy in the tumor bed, with a total dose of 60Gy. Clinical target volume(CTV) and heart were evaluated with dose-volume histograms(DVH) in the two plans, with the t test taken with SPSS 11.0. Results Average received dose of 95% breast volume(D 95) was (4541?34),(4517?62)cGy, volume of 105% of dose prescription(V 105%) was 17.5%?17.6%,29.4%?26.3%, while V 110% was 0.3%?0.8%,3.7%?8.2% with IMRT and CR, respectively. Received 30Gy by the heart(V 30) was 4.6%?4.3%,18.8%?12.2%(P

A novel strategy for the detection of SARS-CoV-2 variants based on multiplex PCR-MALDI-TOF MS

BackgroundThe second wave of coronavirus disease 2019 (COVID-19) has been incessantly causing catastrophe worldwide, and the emergence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants causes further uncertainty regarding epidemic risk. Here, a novel strategy for the detection of SARS-CoV-2 variants using multiplex PCR coupled with MALDI-TOF MS was developed. MethodsPlasmids carrying gene sequences containing 9 mutation types in 7 mutated sites (HV6970del, N501Y, K417N, P681H, D614G, E484K, L452R, E484Q and P681R) in the receptor-binding domain of the spike protein of SARS-CoV-2 variants were synthesized. Using the nucleic acid sequence of SARS-CoV-2 nonvariant and a synthetic SARS-CoV-2-variant-carrying plasmid, a MALDI-TOF MS method based on the single-base mass probe extension of multiplex PCR amplification products was established to detect the above nine mutation types. The detection limit of this method was determined via the concentration gradient method. Twenty-one respiratory tract pathogens (9 bacteria, 11 respiratory viruses) and pharyngeal swab nucleic acid samples from healthy people were selected for specific validation. Sixteen samples from COVID-19 patients were used to verify the accuracy of this method. ResultsThe 9 mutation types could be detected simultaneously by triple PCR amplification coupled with MALDI-TOF MS. SARS-CoV-2 and all six variants (B.1.1.7, B.1.351, B.1.429, B.1.526, P.1 and B.1.617) could be identified. The detection limit for all 9 sites was 1.5x103 copies. The specificity of this method was 100%, and the accuracy of real-time PCR CT values less than 30 among positive samples was 100%. This method is open and extensible, and can be used in a high-throughput manner, easily allowing the addition of new mutation sites as needed to identify and track new SARS-CoV-2 variants as they emerge. ConclusionsMultiplex PCR-MALDI-TOF MS provides a new detection option with practical application value for SARS-CoV-2 and its variant infection. Key pointAn all-in-one SARS-CoV-2 variant identification method based on a multiplex PCR-MALDI-TOF MS system was developed. All of the SARS-CoV-2 variants can be identified based on 9 types of 7 mutated sites of RBD of spike protein using this method.