ABSTRACT
Objective:To compare the clinical effects of minimally invasive reduction through a bone tunnel combined with Jail screwing and those of posterolateral locking plating in the treatment of simple posterolateral tibial plateau fractures.Methods:A retrospective analysis was conducted of the data of 48 patients who had been operatively treated and completely followed up at Department of Orthopedics, Suqian Hospital of Nanjing Drum Tower Hospital Group for simple posterolateral tibial plateau fractures from October 2016 to October 2020. There were 26 males and 22 females, aged from 35 to 68 years. They were divided into a minimally invasive group (25 cases subjected to minimally invasive reduction through a bone tunnel combined with Jail screwing) and an incision group (23 cases subjected to posterolateral locking plating) according to their surgical methods. The operation time, incision length, intraoperative blood loss, fracture healing time, cumulative fluoroscopy time, hospital stay and posterior inclination angles of the tibial plateau and Hospital for Special Surgery (HSS) knee function scores at 1, 3, 6, 9, and 12 months after operation were compared between the 2 groups. Complications in the 2 groups of patients were recorded.Results:There was no significant difference in the preoperative general data between the 2 groups, showing comparability ( P>0.05). The 48 patients were followed up for 12 to 36 months (average 16.5 months). The minimally invasive group was significantly better than the incision group in operation time [(42.6±9.1) min versus (65.7±11.5) min], incision length [(4.0±0.4) cm versus (15.0±1.5) cm], intraoperative blood loss[(22.6±5.8) mL versus (31.5±8.8) mL], hospital stay [(7.6±1.4) d versus (11.1±2.4) d], and HSS score one month after operation [(84.8±1.9) points versus (72.9±4.1) points], but the cumulative fluoroscopy time in the incision group [(4.1±1.4) s]was significantly less than that in the minimally invasive group [(22.3±4.2) s] ( P<0.05). There were no significant differences in fracture healing time, HSS scores at 3, 6, 9, or 12 months after operation, or posterior inclination angle of the tibial plateau between the 2 groups ( P>0.05). There were no such complications as wound infection, vascular injury, internal fixation failure, nonunion or malunion of fractures in either of the 2 groups. Two cases in the incision group presented with symptoms of common peroneal nerve injury but recovered 3 months after operation. Conclusions:Although both minimally invasive reduction through a bone tunnel combined with Jail screwing and posterolateral locking plating can achieve satisfactory outcomes in the treatment of simple posterolateral tibial plateau fractures, the minimally invasive technique is preferable because it shows the advantages of a smaller incision, less bleeding, shorter operation time, a lower operation risk, quicker postoperative recovery and shorter hospital stay.
ABSTRACT
Objective:To evaluate our novel path based on anatomical division of the anterior lateral wall of calcaneus and the sustentaculum tali for precise sustentacular screw placement in the surgical treatment of calcaneal fractures of Sanders types Ⅱ and Ⅲ.Methods:The anterior lateral wall of the calcaneus was divided into the anterior-superior zone S 1, the anterior-inferior zone S 2, the posterior-superior zone S 3 and the posterior-inferior zone S 4 for demarcation of the screw insertion points by our method of Four Zones, and into the front, middle and rear sections by our method of Three Sections for demarcation of the screw target points. The specimens were scanned by CT and modeled by Mimics. On the 3D virtual model of the calcaneus, one screw was placed from each zone of the anterior lateral wall of the calcaneus to the sustentaculum tali body. The screw placement target for S 1 and S 2 was the medial intersection point P 1 of the front and middle sections of the sustentaculum tali, and that for S 3 and S 4 was the medial intersection point P 2 of the middle and rear sections of the sustentaculum tali. It was observed whether the screws were placed in the bone channel. A total of 72 patients were included who had been admitted to Department of Orthopaedics, Suqian Hospital Affiliated to Xuzhou Medical University for calcaneal fractures of Sanders types Ⅱ and Ⅲ from January 2017 to January 2021. They were divided into an anatomical division group and a 3D printing group according to their screw placement method for the sustentaculum tali. In the anatomical division group of 32 patients subjected to screw placement based on our anatomical division, there were 25 males and 7 females, aged from 24 to 60 years; in the 3D printing group of 40 patients subjected to screw placement assisted by 3D printing, there were 31 males and 9 females, aged from 25 to 58 years. The disparities between the parameters of sustentacular screw placement and the actual values were compared in the anatomical division group, and the total number of screws, screws on average, distribution of screws, and accuracy of screw placement were compared between the 2 groups. Results:All the screws which were virtually placed in the specimens of the calcaneus from S 1 and S 2 to P 1 and from S 3 and S 4 to P 2 passed through the bony channel, with no perforation into the tarsal sinus. There was no significant difference in the general date between the anatomical division group and the 3D printing group, showing they were comparable ( P > 0.05). In the anatomical division group, a total of 52 screws were placed to the sustentaculum tali with an average of (1.63 ± 0.48) screws per patient, and 2 screws were placed in 20 patients, yielding an accuracy rate of screw placement of 92.3% (48/52). There were no statistically significant differences between the parameters and the actual values of screw placement in the anatomical division group ( P > 0.05). In the 3D printing group, a total of 63 screws were placed to the sustentaculum tali with an average of (1.58 ± 0.49) screws per patient, and 2 screws were placed in 23 patients, yielding an accuracy rate of screw placement of 93.7% (59/63). There were no significant differences in the above comparisons between the anatomical division group and the 3D printing group ( P > 0.05). Conclusion:In the surgical treatment of calcaneal fractures of Sanders types Ⅱ and Ⅲ, the sustentacular screw placement based on our anatomical division of the anterior lateral wall of the calcaneus and the sustentaculum tali can lead to similar clinical accuracy as 3D printing-assisted screw placement does.
ABSTRACT
Objective:To explore the efficacy of the proximal tibial lateral locking plate with rafting screws combined with Jail screws in the treatment of collapse fracture of the lateral tibial plateau.Methods:A retrospective case series study was performed on clinical data of 36 patients with collapse fracture of the lateral tibial plateau admitted to Suqian Hospital of Nanjing Drum Tower Hospital Group from January 2016 to January 2020, including 19 males and 17 females, aged 34-68 years [(48.6±5.8)years]. Schatzker classification was type II in 28 patients and type III in 8 patients. All patients were treated using the proximal tibial lateral locking plate with raft screws combined with Jail screws. The operation time, intraoperative blood loss and fracture healing were detected. The distance of articular surface collapse of the tibial plateau, posterior inclination angle (PSA) of the tibial plateau, tibial plateau varus angle (TPVA) and Rasmussen anatomical score were compared before operation and at day 2 and 1 year after operation. The Hospital for Special Surgery (HSS) score was used to evaluate knee function at day 2 and 1 year after operation. Complications were also recorded.Results:All patients were followed up for 12-32 months [(19.5±3.1)months]. The operation time was 56-82 minutes [(68.5±9.1)minutes]. The intraoperative blood loss was 40-100 ml [(75.6±10.2)ml]. The fracture was clinically healed by first-stage, with the healing time of 8 to 15 weeks [(12.5±1.3)weeks]. The distance of articular surface collapse of the tibial plateau was improved from (15.5±4.2)mm before operation to (0.7±0.3)mm at day 2 after operation and (1.0±0.2)mm at 1 year after operation (all P<0.01). The PSA was improved from (21.2±2.1)° before operation to (8.9±0.8)° at day 2 after operation and (9.2±0.6)° at 1 year after operation (all P<0.01). The TPA was improved from (100.2±3.7)° before operation to (88.9±1.8)° at day 2 after operation and (87.2±1.6)° at 1 year after operation (all P<0.05). The Rasmussen anatomical score changed from (7.8±1.8)points before operation to (17.1±0.9)points at day 2 after operation and (16.3±0.7)points at 1 year after operation (all P<0.01). There were no significant difference in the distance of articular surface collapse of the tibial plateau, PSA, TPVA and Rasmussen anatomical score at day 2 and 1 year after operation (all P>0.05). The HSS score was (92.8±3.2)points at 1 year after operation, significantly higher than (74.8±3.5) points at day 2 after operation ( P<0.01). Two patients sustained superficial wound infection after operation, which healed after debridement and dressing change. No deep infection occurred. Conclusion:For patients with collapse fracture of the lateral tibial plateau, the proximal tibial lateral locking plate with rafting screws combined with Jail screws can effectively prevent secondary collapse of the articular surface and obtain satisfactory anatomical reduction, good functional recovery and few postoperative complications.
ABSTRACT
Objective To investigate the effects of Maiqi-Jiangtang pill on the glycolipid level in type 2 diabetic ob/ob mice.Methods The 8-week old male ob/ob mice were randomly divided into Maiqi-Jiangtang pill high- (8 g/kg), medium- (4 g/kg), low- (2 g/kg) dose groups. All the mice orally adiministered with the drugs once a day for 10 weeks. The same week age normal C57BL/6J control mice and ob/ob model group mice were orally administered with the equal volume solvent. The body weight per week were recorded. The fasting blood-glucose (FBG) was measured by glycemic instrument. The content of TG, TC, HDL-C, LDL-C in serum, and TG and TC content in liver were determined by biochemical method. The liver index was calculated.Results Compared with ob/ob model group, there was no significant change in body weight of mice administered with Maiqi-Jiangtang pill for 10 weeks. Compared with the model group, the low-, medium- dose Maiqi-Jiangtang pill could significantly decrease the FBG (7.43 ± 1.71 mmol/L,7.84 ± 1.09 mmol/L vs.8.95 ± 0.96mmol/L), the high- dose Maiqi-Jiangtang pill could significantly reduce the TG (0.93 ± 0.16 mmol/L vs.1.18 ± 0.26 mmol/L) and LDL-C (2.10 ± 0.51 mmol/L vs.2.56 ± 0.44 mmol/L) content in serum of ob/ob mice (P<0.05), increase the HDL-C/LDL-C ratio (2.40 ± 0.39vs.1.96 ± 0.24) in serum (P<0.01), decrease the liver weight (3.52 ± 0.26 gvs. 3.98 ± 0.35 g) and the liver index (0.063 ± 0.004vs. 0.071 ± 0.006) (P<0.05). Compared with the model group, the low dose Maiqi-Jiangtang pill could also significantly decrease the TG level (0.63 ± 0.25 mmol/gvs. 1.05 ± 0.67 mmol/g) in liver and significantly increase the HDL-C/LDL-C ratio (2.30 ± 0.44vs. 1.96 ± 0.24) in serum (P<0.05).Conclusions The Maiqi-Jiangtang pill can reduce lipid in serum and liver of ob/ob mice while it can decrease the blood glucose, which need to further study its mechanism.
ABSTRACT
Cultivating students' autonomic learning ability is an important research area . It is very important to build a reasonable evaluation system in the process of cultivating students' autonomic learning ability. Based on the autonomic learning content and teaching methods of pharmacology of traditional Chinese medicine, this paper discusses the design and implementation strategies of pluralistic evaluation system including learning in the classroom, expands the learning out of the classroom, experimental operation and final examination, which emphasizes the combination of process evaluation and the participation of teachers and students. It is beneficial to stimulate students'self-learning motivation and improve their self-learning ability and learning effect.
ABSTRACT
Cultivating students' autonomic learning ability is an important research area . It is very important to build a reasonable evaluation system in the process of cultivating students' autonomic learning ability. Based on the autonomic learning content and teaching methods of pharmacology of traditional Chinese medicine, this paper discusses the design and implementation strategies of pluralistic evaluation system including learning in the classroom, expands the learning out of the classroom, experimental operation and final examination, which emphasizes the combination of process evaluation and the participation of teachers and students. It is beneficial to stimulate students'self-learning motivation and improve their self-learning ability and learning effect.
ABSTRACT
To explore the mechanism for changes in brain microstructure in long-term abstinent from methamphetamine-dependence by using the diffusion tensor imaging (DTI). Methods: A total of 26 patients with long-term abstinent methamphetamine-dependence, whose abstinence time more than 14 months, and 26 normal controls all underwent cognitive executive function tests and DTI scans. We used voxel-based analysis to compare the fractional anisotropy (FA) and mean diffusivity (MD) to obtain the abnormal brain regions of DTI parameters between the two groups. Spearman correlation analysis was used to explore the correlation between FA, MD of the brain regions with abnormal parameters and cognitive executive function tests. Results: There were no statistical differences in the cognitive executive function tests between the two groups (P>0.05). Compared with the normal control group, the long-term abstinent from methamphetamine-dependence group showed the decreased FA in the right precuneus, right superior frontal gyrus, right calcarine, left inferior temporal gyrus and the increased MD in the right triangular part of inferior frontal gyrus, right precuneus, right posterior cingulate, right middle temporal gyrus, bilateral middle occipital gyrus, left superior parietal lobule, and lobule VIII of cerebellar hemisphere. The MD values of the right middle temporal gyrus in the long-term abstinent group were negatively correlated with the number of completions within 60 seconds (r=-0.504) and within 120 seconds (r=-0.464) . Conclusion: The DTI parameters in multiple brain regions from the methamphetamine-dependence patients are still abnormal after a long-term abstinence. DTI can provide imaging evidence for brain microstructural abnormalities in long-term abstinent from methamphetamine-dependence.
Subject(s)
Humans , Amphetamine-Related Disorders , Anisotropy , Brain , Diffusion Tensor Imaging , MethamphetamineABSTRACT
Objective To study the protective effect of Panax notoginseng saponins(PNS)and its components Rg1 and Rb1 on oxygen-glucose deprivation/reoxygenation(OGD/Reox)-induced tight junction damage. Methods Anaerobic box were used to induce OGD in HUVEC cells for 6 h followed by reoxygenation for 24 h. Transepithelial/endothelial electrical resistance(TEER)and cell permeability were detected,immunefluorescence was used to observe the ZO-1 and claudin-5 protein expression. Results PNS 20,40 mg/L and ginsenoside Rb1 significantly inhibited the OGD/Reox-induced decreased tight junction resistance,and the increased cell permeability(P< 0.05). PNS 20,40 mg/L and ginsenoside Rb1 partly restored the inter-cellular tight junctions which were regularly arranged on the cell membrane, and the cells displayed cobble stone-like arrangement. Conclusions PNS ameliorates ischemia-induced vascular endothelial cell tight junction damage via MMP-9 and VEGF/VEGFR2 signaling pathway. Rb1 is one of the effective monomer components.
ABSTRACT
To assess the value of noise-optimized virtual monoenergetic imaging (VMI+) reconstruction technique on objective and subjective image quality in patients with inflammatory bowel disease (IBD) undergoing abdominal dual-energy computed tomography (DECT). Methods: Datasets from 32 patients (22 men, 10 women) with IBD, who underwent abdominal DECT, were reconstructed by using the standard linearly blended (M_0.6), traditional monoenergetic (VMI) and VMI+ algorithms in 10-keV intervals from 40-100 keV. Attenuation in IBD lesions was measured to perform objective evaluation using signal-to-noise (SNR) and contrast-to-noise ratios (CNR). Subjective evaluation was performed by 3 independent blinded radiologists using 5-point Likert scales. The overall image quality, image sharpness, lesion delineation, and image noise were analyzed. Results: Mean SNR and CNR peaked at 40 keV VMI+ series (SNR 8.28±2.34, CNR 5.10±2.10) and they were significantly higher than those in linearly blended (SNR 5.82±1.44, CNR 1.53±0.86) and all VMI series (all P<0.01). Subjective image parameter was the highest for the 50 keV VMI+ series regarding overall image quality (mean 4.80, all P<0.01). The highest image sharpness scores were observed at 40 and 50 keV VMI+ reconstructions (mean 4.14 and 4.25, respectively; P=0.415). VMI+ series at 40 keV provided the highest lesion delineation (mean 4.52, all P<0.01). Image noise was low at the 100 keV VMI+ and VMI series (mean 4.58 and 4.40, respectively; P≥0.11). Conclusion: Low-keV VMI+ reconstructions improves SNR, CNR, and subjective image quality significantly in patients with IBD.
Subject(s)
Female , Humans , Male , Inflammatory Bowel Diseases , Diagnostic Imaging , Radiographic Image Interpretation, Computer-Assisted , Radiography, Dual-Energy Scanned Projection , Methods , Reproducibility of Results , Retrospective Studies , Signal-To-Noise Ratio , Tomography, X-Ray Computed , MethodsABSTRACT
The Chinese herbal compound formula preparation,which is guided by traditional Chinese medicine (TCM) theories,and based on long-term clinical application,has its unique value.The multi-compound and multi-target characteristics are also features of Chinese materia medica (CMM).The finding and exploration of innovation CMM in modern times should be based on TCM theory and clinical application,as well as the combination of efficacy in the concept of holism and biomedical technology.Key issue in the research,development and evaluation of innovation Chinese medicine is to use to the methodology to illustrate the scientific meaning in according to the clinical application characteristics of Chinese herbal compound formula preparation.During the research and development process,considerations on CMM characteristics should be taken from research evidence,to pharmacodynamics and toxicology studies.Pharmacodynamics researches should reflect the properties of TCM syndrome.Aspects,such as research and application of TCM syndrome model,correspondence between disease and syndrome model,research method of correspondence between syndrome and prescription,identification of biological markers corresponding to CMM pharmacologic effect,are important.So we should catch up the historical chance for TCM development,speedily develop the advantage areas,and promote the modernization and innovation of TCM.
ABSTRACT
Aim To establish phlegm and blood stasis, qi-stag-nation and blood stasis, phlegm turbid+qi-stagnation and blood stasis model in rats and to study the characteristics of animal models with different blood stasis. Methods SD rats were ran-domly divided into normal group, high fat diet group, chronic unpredictable mild stress group ( CUMS ) and high fat diet +chronic unpredictable mild stress group. Different states of blood stasis rat models were established by corresponding factors for 6 weeks. Indexes of weight, open field behavior, serum lipids and corticosterone were monitored dynamically at the 2 nd, 4 th, 6 th weeks. At the end of the experiment(6th week), the heart func-tion was detected by small animal ultrasound and the left ventric-ular intubation. The blood rheology indexes were detected by the viscosity tester and red blood cell deformation/aggregation test instrument. Results Compared with the normal group, blood stasis could be induced by high fat diet and chronic unpredicta-ble mild stress, introducing the influence of different degree on animal behavior, blood lipids, heart function and blood viscosi-ty. When the two factors were superimposed, the changes of the indexes about blood stasis were the most significant. Perform-ance as: compared with normal control group, a significant re-duction was observed in body weight ( P < 0. 01 ); horizontal movement, vertical movement and movement time were reduced (P<0. 01 or P<0. 05) at the 2 nd week;at the 2 nd and 4 th week, serum corticosterone was increased ( P <0. 01 or P <0. 05) as well as TG at the 4 th and 6 th week (P<0. 01); at the 6 th week, velocity of blood was slowed down ( P<0. 01 );left ventricular anterior wall and posterior wall thickness at end-systolic was increased ( P<0. 01 or P<0. 05 ); left ventricular diastolic index was increased ( P<0. 01 ); the maximum rate of myocardial contraction was decreased ( P < 0. 05 ); the whole blood viscosity was increased ( P<0. 01 ) . Conclusions Blood stasis could be formed by high fat diet and chronic unpredictable mild stress, which has different characteristics. When the two factors are superimposed, the abnormal behavior, blood viscosi-ty, heart function, blood lipid and other indexes of the animal could obviously appear, which can provide the basis for the stud-y of blood stasis syndrome and related drugs.
ABSTRACT
Alzheimer ’ s disease ( AD ) is characterized by pro-gressive loss of memory and other cognitive functions .With re-cent discoveries , activation of silent mating-type information reg-ulator 2 homolog 1 ( SIRT1 ) could attenuate the cognitive dys-function of AD via reducing amyloid-βaggregation and tau pro-tein phosphorylation , inhibiting inflammatory reaction , and regu-lating synaptic plasticity .This review aims to highlight the in-volvement of these new discoveries of SIRT 1, and Akt/protein kinase B(PKB) signaling pathways, for their potential therapeu-tic effect against AD .
ABSTRACT
Objective To evaluate the effects of baijin capsule on behavioral changes and monoamine neurotransmitters concentration in chronic unpredictable mild stress ( CUMS ) depression rat model.Methods The depression rat model was induced by11-week chronic unpredictable mild stress combining with solitary.After the model were established, rats were given the decoction of baijin capsule ( 12.6 g/kg, 4.2 g/kg, 1.4 g/kg ) or fluoxetine hydrochloride (3.5 mg/kg) by intragastricfor 4 weeks.During the experiment period, sucrose consumption and open-field experiment were conducted to monitor the behavior of rats, such as sucrose consumption percentage, horizontal motion, and vertical motion.At the end of the experiment, the levels of the monoamine neurotransmitters in the cerebral cortex and hippocampus were analyzed by method of high performance liquid chromatography-electrochemistry.Results Compared with the normal group, the weight, horizontal displacement distance, vertical movement times, and sucrose consumption percentage of rats in model group decreased significantly after stimulated with CUMS and solitary for 7 weeks (P<0.05,P<0.01).Compared with model group, consecutively administrated for 4 weeks, horizontal displacement distance, vertical movement times, and the percentage in sugar water consumption significantly increased with the treatment of baijin capsule (P<0.05, P<0.01).Meanwhile, the content of norepinephrine (NE), dopamine (DA), and 5-hydroxytryptamine (5-HT) in the cortex were significantly increased in rats of the baijin capsule ( P <0.05 ) .Conclusions The results indicated that baijin capsule improved the behavioral disturbances in depression rat model, which were related to enhancement of the concentration of monoamine neurotransmitters in the cortex.
ABSTRACT
Objective To establish experimental vascular dementia rat model and evaluate gait behavior . Methods Vascular dementia rat model induced by bilateral carotid artery ligation methods , 50 days for real-time gait behavioral training and testing after surgery .Results Compared with the sham group , Experimental vascular dementia model rats had 19 gait indicators appeared significantly statistical difference , Animal model gait abnormal behavior is mainly reflected in the forelimb step width increased (P <0.05), each foot walk cycle extension (P <0.05), Each foot stance time increased (P <0.05, P <0.01), and the swing time shortened (P <0.05), Homologous coupling shortened (P<0.05), each foot average footprint area and average intensity increased (P <0.05, P <0.01).Conclusion Experimental rat model of vascular dementia in real time gait abnormal behavior and seen in patients with clinical symptoms similar, can provide a reference model for the establishment and judgment .
ABSTRACT
Objective To explore the relationship between the gait behavior changes and cognitive function in APP/PS1 transgenic mice .Methods 16 APP/PS1 transgenic mice were divided into model group and Huperzine A group, C57/BL6J mice with the same age were chosed as control group .After a 150 days consecutive treatment , Morris water maze(MWM) was used to detect the learning and memory ability and Gait analysis system (GAS-2) was used to detect the gait behavior after the treatment when the mice were 8-month-old.Results The escape latency of the model group was significantly higher than that of the control group ( P <0.05 ) , the time spended in the target quadrant , swimming distance in the target quadrant significantly lower than that of the control group ( P <0.05 ) , the first time passing through the platform prolonged significantly than the control group (P <0.05), and the number of passing though the platform reduced significantly than the control group (P <0.05).In the gait behavior experiments , compared with the control group, the average walking speed of the model group reduced significantly (P <0.05), the average walking cycle, the absolute average body angle and lateral movement increased significantly (P <0.05);The percentage of support time in a walking cycle of the left and right foot increased significantly (P <0.05).Accordingly, the percentage of swing time in a walking cycle of the left and right foot reduced significantly (P <0.05).The propulsion index of the left hand , right hand, right foot increased significantly ( P <0.05), and then the braking index of the above three feet decreased significantly ( P <0.05) .Huperzine A can improve the cognitive function , rectify the changes in the gait behavior .The two behavioral relevance shows that cognitive function and the front two feet braking , propulsion index have a high correlation index (correlation coefficients were -0.433, -0.379, P values were 0.039,0.079), the others were not. Conclusion APP/PS1 transgenic mice of 8-months-old have a remarkable impairment of learning and memory ability and disorder of gait behavior , and these two behaviors have a correlation in some extent .
ABSTRACT
Objective To study the real-time gait behavioral changes in rat models of experimental diabetic peripheral neuropathy.Methods Twenty-five SPF Sprague-Dawley rats were randomly divided into experimental group ( 6 males and 7 females) and control group (6 males and 6 females).Diabetes was induced in rats by intraperitoneal injection of streptozotocin ( STZ ) in a dose of 45 mg/kg.The gait behavior in all rats was tested at 12 weeks after diabetes modelling.Results Compared with the control group, the rats with diabetic peripheral neuropathy showed statistically significant different walk cycle extension, walk speed, average print intensity, balance and coordination.The abnormal gait behavior of the rat models was mainly reflected in the increased average and each foot walk cycle extension ( P<0.01 ) , average intensity (P<0.05), absolute average body rotation (P<0.01),and shortened both homologous coupling and homolateral coupling( P <0.05 ) .Conclusions Experimental rat models of diabetic peripheral neuropathy can exhibit obvious changes of gait behavior, and may provide a reference for related clinical and basic research.
ABSTRACT
OBJECTIVE@#To evaluate dynamic contrast-enhanced MRI in conjunction with MR subtraction in the differential diagnosis of benign and malignant breast tumors at 3 Tesla.@*METHODS@#A total of 78 patients with breast tumors enrolled in this study, including 45 malignant lesions and 33 benign lesions verified by histopathology. Dynamic MR contrast enhanced imaging was done by T1 high resolution isotropic volume excitation sequence. MR subtraction was used to retrospectively analyze the MR dynamic image. A dynamic phase subtraction (DPS) map is a map image with pixel-by-pixel subtraction of an early-phase image from a delayed maximum enhancement phase image obtained in a dynamic study. The sensitivity and specificity were calculated with or without subtraction in the diagnosis of benign and malignant breast tumors.@*RESULTS@#The sensitivity of benign breast masses increased from 0.879 to 0.939, and the specificity increased from 0.818 to 0.909 with reference to the DPS map. There was statistical difference between with or without DPS (Z=2.023, P=0.043). The sensitivity of breast malignant masses increased from 0.889 to 0.933, and the specificity increased from 0.867 to 0.911 with reference to the DPS map, with statistical difference between with or without DPS map (Z=2.294, P=0.021). The pattern of TIC changed from continuous to a plateau in 8 patients, from a plateau to washout in 10, and from continuous to washout in 5. No changes were observed in the other 55 patients.@*CONCLUSION@#MR Subtraction is a simple and useful technique to identify breast lesions. It helps to accurately set the location of the ROI TIC and improve the detection rate of benign and malignant breast tumors.
Subject(s)
Female , Humans , Breast Neoplasms , Diagnosis , Contrast Media , Diagnosis, Differential , Image Enhancement , Magnetic Resonance Imaging , Retrospective Studies , Sensitivity and SpecificityABSTRACT
This study was aimed to observe influence of disease/syndrome on the toxicity and effect of aconite roots, in order to reveal relationship among disease/syndrome, toxicity and effect. The mice model of cold syn-drome was establish by wind-cold stimulation. The pain model was established by intraperitioneal injection of glacial acetic acid. Then, LD50 and ED50 of analgesic effect were compared, as well as the therapeutic index (TI) of crude aconite roots. The rat model of cold syndrome was also established by wind-cold stimulation. And the rheumatoid arthritis (RA) model was established by intracutaneous injection of CII and CFA. TD50 of cardiac toxic-ity and arthroncus degree of prepared aconite roots were compared among the normal rats, RA rats, RA with wind-cold stimulation rats according to the recording of lead II ECG. The results showed that after wind-cold stimulation, mice and rats appeared with symptoms which were similar to Chinese medicine cold syndrome. Com-pared with normal mice, LD50 and TI increased, but ED50 decreased in the group of wind-cold stimulation after using powders of crude aconite roots. Compared with normal rats, TD50 of cardiac toxicity and arthroncus degree in-creased in groups of RA and RA with wind-cold stimulation after using prepared aconite roots. It was concluded that in the case of disease/syndrome state, the toxicity of aconite roots decreased, but its effect increased. It sug-gested that there is a significant correlation among disease/syndrome, toxicity and effect.
ABSTRACT
This study was aimed to observe the influence of Catalpol on real-time gait analysis of early recovery after permanent middle cerebral artery occlusion (pMCAO) in rats to evaluate its effect on the improvement after cerebral ischemia. Rats were randomly divided into 6 groups, which were the normal control group, model group, Tianbaoning group, Catalpol 15, 30, 60 mg·kg-1 group. Rats were trained on the gait instrument for 7 days before pMCAO, 3 times/day. After the training, pMCAO model was made. And continuous infusion was performed from the 3rd to the 14th day after the operation. Then, the real-time gait behavior was detected on the 14th day. The re-sults showed that 14 days after the surgery, compared with the normal control group, the models had a significant extending in the duty cycle (P < 0.01), and obvious increasing of the average body angle of absolute value (P <0.05), the shortening of the two feet supporting time (P < 0.05), and extending of three feet supporting time (P <0.01), and increasing of the coordination index (P < 0.01). Compared with the model group, the Catalpol of 30 mg·kg-1 and 60 mg·kg-1 group has obviously decreased duty cycle and average body angle of absolute value (P <0.05, or P < 0.01). The Catalpol of 30 mg·kg-1 can obviously reduce the coordination index of the right front foot relative to the other three feet (P < 0.05), which improved the coordination of cerebral ischemia animals. It was concluded that Catalpol can improve the real-time gait behavior changes of cerebral ischemia model rats. There-fore, Catalpol have a neural protective effect on cerebral ischemia.
ABSTRACT
This study was aimed to explore the effect of Catalpol on the cerebral infarction size in acute phase, water content and inflammatory reaction of early recovery after permanent middle cerebral artery occlusion (pM-CAO). Adult male Sprague-dawley rats were subjected to chemical method to establish MCAT model. The detec-tion was made on neurobehavioral symptoms, cerebral infarction volume and water content at 24 h after surgery. The content of intedeukin-6 (IL-6), intedeukin-10 (IL-10) and nuclear factor kappa Bp65 (NF-κBp65) were de-tected after pMCAO with enzyme-linked immunosorbent assay (ELISA). The results showed that 24 h after MCAT, Catalpol 15-60 mg·kg-1 can significantly improve the neurobehavioral symptoms (P < 0.01, or P <0.001). The Catalpol 15 mg·kg-1 can significantly reduce cerebral infarction volume (P < 0.05). The Catalpol 30-60 mg·kg-1 can significantly reduce water content (P < 0.05). Catalpol 30-60 mg·kg-1 can significantly improve neurobehav-ioral symptoms from the 7th day after pMCAO. On the 14th after pMCAO, the content of IL-10 and NF-κBp65 of ischemia brain had no difference compared with sham-operated group. The IL-6 level of ischemia brain was obvi-ously reduced than the sham-operated group(P < 0.05). The intragastric administration of Catalpol 15 mg·kg-1 for 14 days can reduce the content of NF-κBp65 in the ischemia brain of model rats (P < 0.05). It was concluded that Catalpol can improve neurobehavioral symptoms of acute and subacute phase after cerebral ischemia, reduce infarcts and water content. These effects may not be related with its inhibition of inflammatory derived from cere-bral ischemia.