Clinical and laboratory characteristics of rheumatoid arthritis with positive antinuclear antibody / 北京大学学报(医学版)

OBJECTIVE@#To analyse the clinical and laboratory characteristics of antinuclear antibody (ANA) positive rheumatoid arthritis (RA) patients.@*METHODS@#The clinical and laboratory data of 428 RA cases from Department of of Rheumatology and Immunology Peking University Third Hospital from Jan 2013 to Dec 2018 were collected and used to analyse characters between ANA positive group and ANA negative group. T test was used for the quantitative data in accordance with normal distribution. Wilcoxon rank sum test was used for the quantitative data of non normal distribution. The qualitative data were analyzed by chi square test. But while 1≤theoretical frequency < 5, chi square test of corrected four grid table was used. And Fisher exact probability method was used when theoretical frequency < 1.@*RESULTS@#The number of ANA positive group was 231 (54%). The female rate was obviously higher in ANA positive group (82.7% vs. 63.5%, χ2=20.355, P < 0.01). The rate of metatarsophalangeal joints (MTPJs) involvement was lower in ANA positive group (22.1%) than in ANA negative group (33.0) (χ2=6.414, P < 0.05). The incidence of secondary Sjögren's syndrome (sSS) was much higher in ANA positive group(19.5% vs. 4.1%, χ2=23.300, P < 0.01). The positivity of rheumatoid factor (RF), as well as the positivity of anti-cyclic citrullinated peptide(CCP) antibody was much higher in ANA positive group (77.1% vs. 53.8%, χ2=25.743, P < 0.01, 74.9% vs. 59.4%, χ2=11.694, P < 0.01, respectively). The levels of immunoglobulin G (IgG) and immunoglobulin M (IgM) of ANA positive group were higher [(15.1±5.1) g/L vs. (13.8±5.3) g/L, t=2.359, P < 0.05, 1.25 (0.92) g/L vs. 1.05 (0.65) g/L, Z=-3.449, P < 0.01, respectively]. But the levels of hemoglobin (Hb) and platelet (PLT) was lower in ANA positive group[(109.64±17.98) vs. (114.47±18.48) g/L, t=-2.734, P < 0.01; (266.4×109±104.6×109) vs. (295.9×109±100.1×109) /L, t=-2.970, P < 0.01, respectively].@*CONCLUSION@#The incidence of sSS was obviously higher in ANA positive group than in ANA negative group. Serum IgG of ANA positive group was higher, but Hb and PLT were lower.

Multidisciplinary classification of magnetic resonance imaging features of neuropsychiatric lupus / 北京大学学报(医学版)

OBJECTIVE@#To investigate the clinical correlation between the manifestations of neuropsychiatric lupus (NPSLE) and brain magnetic resonance imaging (MRI).@*METHODS@#Retrospective analysis of 65 neuropsychiatric lupus patients with brain MRI and clinical data from Peking University Third Hospital from January 2006 to October 2016, which was classified by rheumatologist, neurologists, and radiologists based on their brain MRI findings. The correlation between brain MRI findings and clinical manifestations was analyzed.@*RESULTS@#The characteristics of the brain MRI of the 65 patients were divided into 6 categories: 16 cases (25%) with demyelination in the white matter, 15 cases (23%) with cerebrovascular disease, including 4 cases (6%) with large vascular disease and 11 cases (17%) with small vessel disease, 4 cases (6%) with inflammation, 4 cases (6%) with edema, 13 cases (20%) with multiple manifestation coexistence, and 13 cases (20%) without any abnormality. Except for 4 cases of brain MRI with edema, the clinical manifestations were only epileptic seizures, other patients had complex and diverse clinical manifestations, including epileptic seizures, lupus-like headaches, mental symptoms, blurred vision, peripheral neuropathy and disturbance of consciousness. The incidence of epileptic seizures in patients with edema of MRI is significantly higher than that of other patients, and the therapeutic response time is the shortest.@*CONCLUSION@#Multidisciplinary collaboration divides the MRI findings of neuropsychiatric lupus patients into six categories. This classification method helps clinicians to predict and intervene early possible neuropsychiatric symptoms to guide clinical treatment.

Diffusion weighted imaging combined with dynamic contrast enhanced magnetic resonance imaging in monitoring therapeutic efficacy for hepatocellular carcinoma after transcatheter arterial chemoembolization / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To evaluate the diagnostic value of diffusion weighted imaging (DWI) combined with dynamic contrast-enhanced (DCE) MRI in monitoring the efficacy for hepatocellular carcinoma (HCC) after transcatheter arterial chemoembolization (TACE).</p><p><b>METHODS</b>MRI and CT scan were performed 4-6 weeks after TACE in 31 patients.With digital signature algorithm (DSA) examination as the reference standard, the value in detection of the residue and recurrence of HCC was compared between MRI and CT results.</p><p><b>RESULTS</b>Seventy-three lesions were detected in 31 patients. Fourteen lesions confirmed by DSA had no tumor staining, and 59 lesions had tumor staining. Diagnostic sensitivity and specificity of DCE-CT were 78.0% and 85.7%, respectively; while those of DWI combined with DCE-MRI were 100% and 92.9% (P<0.001).</p><p><b>CONCLUSION</b>DWI combined with DCE-MRI is more effective than DCE-CT in detecting the residue and recurrence of HCC after TACE.</p>

Effects of baicalin on apoptosis in rats with autoimmune encephalomyelitis / 中国当代儿科杂志

<p><b>OBJECTIVE</b>To study the therapeutic efficacy of baicalin and its effect on apoptosis of inflammatory cells in spinal cords in Wistar rats with autoimmune encephalomyelitis (EAE).</p><p><b>METHODS</b>Forty-four rats were randomly divided into four groups: normal control group (control, n=10), EAE group (n=12), and two intervention groups with dexamethasone (DXM) or baicalin. Seven days after immunization, the two intervention groups were injected intraperitoneally with DXM (1 mg/kg) and baicalin (200 mg/kg) for 1 week, respectively. The spinal cords were removed 14 days after immunization, and stained with hematoxylin and eosin. MBP expression in spinal cords was detected by immunohistochemistry. The apoptosis of inflammatory cells in spinal cords was detected by TUNEL.</p><p><b>RESULTS</b>The weight gain rate in the untreated EAE and the DXM or baicalin intervention groups were significantly lower than that in the control group (P<0.05). The weight gain rate in the baicalin intervention group was significantly higher than that in the untreated EAE and the DXM intervention groups (P<0.05). The scores of neurological function in the two intervention groups were significantly higher than that in the untreated EAE group (P<0.05). DXM or baicalin treatment significantly increased the MBP expression compared with the untreated EAE group (P<0.05). The apoptosis of inflammatory cells increased more in the DXM and the baicalin intervention groups compared with the untreated EAE groups (P<0.05).</p><p><b>CONCLUSIONS</b>Baicalin has protective effects against EAE in rats. It can promote the apoptosis of inflammatory cells in spinal cords.</p>

Magnetic resonance signal detection of superparamagnetic iron oxide nanoparticles and its biological effects on endothelial cells / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the magnetic resonance (MR) signal changes of superparamagnetic iron oxide (SPIO) and its biological effects on endothelial cells.</p><p><b>METHODS</b>The citric-acid coated SPIO was synthesized by co-precipitation method. The human umbilical vein endothelial cells (HUVECs) were incubated with SPIO for 24 h in culture medium at iron concentration of 0.01, 0.05, 0.10, 0.15 mg/ml (experimental groups), and the cells incubated without SPIO served as control groups. The uptake efficiency of intracellular iron was measured by Prussian blue staining, and the cell viability was monitored by Calcein-AM method. The cell cytoskeleton (F-actin and tubulin), adherence and migration capacity were measured by immunofluorescence staining. The iron oxide nanoparticles distribution and the cellular organelle change were monitored by transmission electron microscopy (TEM). Quantification of particle uptake was measured by atomic absorption spectrometry. The MR signal of endothelial cells after labeling was monitored by Philips 3.0 T MR scanner.</p><p><b>RESULTS</b>SPIO was uptaken by HUVECs in a concentration-dependence manner. Compared with the control group, cell viability was decreased along with the increase of iron concentration. Compared with the control group, the cell cytoskeleton was markedly disorganized and the FAK spot was bigger and sparser.The nanoparticles were mainly existed in lysosomes, and the higher concentration of SPIO, the more lysosomes and vacuoles presented in the cells. The iron content per cell was (55.86 +/-9.935) pg when the SPIO concentration was 0.15 mg/ml. The MR image showed that the cells labeled with SPIO resulted in the decrease of MR signal.</p><p><b>CONCLUSION</b>The cells labeled with SPIO can be detected by MR. The cell viability, cytoskeleton, adherence and migration capacity of HUVECs are affected by citric-acid coated SPIO in a concentration-dependent manner.</p>

Magnetic resonance signal features of superparamagnetic iron oxide with different particle size and concentration / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To investigate the magnetic resonance (MR) signal features of superparamagnetic iron oxide (SPIO) with different particle size and concentration.</p><p><b>METHODS</b>The superparamagnetic iron oxide with different concentration and particle size was scanned by magnetic resonance; T1, T2 and T2(*) values of each group were recorded to evaluate the features of MR signals.</p><p><b>RESULTS</b>The T1 value of SPIO with different particle size had negative linear relationship with concentration. In low concentration the T2 and T2(*) values were elevated markedly with the particle size decreased; while in high concentration the T2 and T2(*)values were elevated gently with particle size decreased. lg(T2), particle size and concentration of SPIO had linear relationship.</p><p><b>CONCLUSIONS</b>SPIO affects magnetic resonance signal mainly with effect on T1 and T2. T2 value can be regarded as the major detection index in the magnetic resonance scan of SPIO. There is a linear relationship among particle size, SPIO concentration and lg(T2) value.</p>

Expression of odorant receptor genes on the olfactory epithelium following olfactory nerve disconnection / 中华耳鼻咽喉头颈外科杂志

<p><b>OBJECTIVE</b>To constitute the animal model of unilateral olfactory nerve transection and observe the expression level and distribution of odorant receptors.</p><p><b>METHODS</b>Thirty-two rats were divided into two groups: the olfactory nerve transection group (20) and the control group (12). The former group received the operation to transect the left olfactory nerve following the left olfactory bulb was exposed under microscope and the latter group did not give any disposal. At every stage of five days, two weeks, four weeks and six weeks after the operation, five rats from the nerve transection group and three from the control group were anaesthetized simultaneously, and olfactory epithelium were taken out after transcardial perfusion, then paraffin imbedding. Coronal sections were sliced for HE staining to observe the thickness changes of the olfactory epithelium, and for in situ hybridization (ISHs) to investigate the expression of olfactory receptor genes (Olr287, Olr226, Olr1493 and Olr1654) in the epithelium, also to evaluate the changes of the expression level and location of the selected receptors during the regeneration of olfactory epithelium.</p><p><b>RESULTS</b>HE staining showed that 5 days after the operation cell quantity and thickness of the olfactory epithelium decreased obviously, which increased gradually 2 or 4 weeks after operation. After 6 weeks' recovery, the thickness of the epithelium could reach the control level. The pattern of cell staining by ISH showed a specific spatial distribution along the anteroposterior (AP) and dorsoventral (DV) axis. Evidence suggested that odorant receptors were distributed in continuous and multiple overlapping bands in the normal or nerve transected-recovered epithelium rather than in the conventionally accepted three or four zones. The data also demonstrated that the distribution of sensory neuron types, as identified and defined by odorant receptor expression, was restored to normal or nearly so by 6 weeks after operation. Likewise, the numbers of probe-labeled neurons in the nerve transected-recovered had an obvious decrease 5 days after olfactory nerve transection. Reactive cells (x(-) +/- s) of Olr1493 in the operated side was (53.9 +/- 19.9), compared with (419.0 +/- 21.2) in the unoperated side, there was statistic significance between them (t = 63.960, P < 0.01). Reactive cells increased gradually according to the regeneration of the epithelium, and were nearly equivalent to the normal side 6 weeks later without significant differentiation (t = 2.600, P > 0.05), according to the absolute positive cells in the operated and unoperated side of (417.8 +/- 32.4) and (445.3 +/- 10.0) respectively.</p><p><b>CONCLUSION</b>The regeneration of the sensory neurons and receptors, both the number and the distribution, can recover to normal after olfactory nerve transection.</p>

Experimental study of hippocampal neuronic lesion in ischemic rat by magnetic resonance spectroscopy / 中国应用生理学杂志

<p><b>AIM</b>To evaluate N-acetylaspartate reflecting the neuronal lesion in middle cerebral artery occlusion and reperfusion rat by magnetic resonance spectroscopy (MRS).</p><p><b>METHODS</b>Sixteen adult Wistar rats with MCAO reperfusion and ten pseudooperation rats were performed MRS in vivo at the sixth weeks, then pathologic examination of HE staining and immunohistochemical staining were made. We compared hippocampus modality, cell density and immunohistochemical results with N-acetylaspartate, creatine changes and ration of NAA/Cr.</p><p><b>RESULTS</b>The values of NAA, Cr and NAA/Cr of ipsilateral hippocampus lesion in MCAO reperfusion rats (2.05 +/- 0.33, 2.42 +/- 0.41 and 0.86 +/- 0.10) were visiblly decreased than contralateral hippocampus (3.45 +/- 0.58, 3.10 +/- 0.93, 1.18 +/- 0.32) and control group (3.42 +/- 0.43, 3.57 +/- 0.47, 0.98 +/- 0.14). But the level of decreased NAA is not corresponding to the degree of neuronal death in ipsilateral region of hippocampus in histochemistry.</p><p><b>CONCLUSION</b>MRS has perfect explanation of cell metabolic changes in CA1 region. Decrease of NAA represented neuron delayed injury. But the decreased level of NAA is not perfectly corresponded to the degree of neuron lost. This change has closed correlation with reactive astrocytes proliferation.</p>

Observation on therapeutic effect of herbs-partitioned moxibustion on Parkinson disease of 54 cases / 中国针灸

<p><b>OBJECTIVE</b>To observe clinical therapeutic effect of herbs-partitioned moxibustion at Shenque (CV 8) on Parkinson disease.</p><p><b>METHODS</b>Ninety cases of Parkinson disease were randomly divided into a treatment group (n=4) and a control group (n=36) in order of visiting. The two groups were treated with routine western medicine for treatment of Parkinson disease, and herbs-partitioned moxibustion at Shenque (CV 8) was added to the treatment group. Their comprehensive therapeutic effects were observed and modified UPDRS cumulative scores were compared.</p><p><b>RESULTS</b>The total effective rate was 83.3% in the treatment group, significantly better than 58.3% in the control group (P < 0.01); the modified UPDRS cumulative score was reduced by 74.1% in the treatment group, significantly better than 16.7% in the control group (P < 0.01).</p><p><b>CONCLUSION</b>Herbs-partitioned moxibustion at Shenque (CV 8) has a certain therapeutic effect on Parkinson disease.</p>

Preliminary study on Professor SUN Liu-he's academic thought / 中国针灸

Professor SUN Liu-he has been engaged in scientific research, clinical and teaching works for tens years and he is a meticulous scholar with great learning, rich clinical experience and great theoretical attainments. In clinical practice of many years, he summarizes and develops Kangai Plaster, Kangai Fushui Plaster, Ai tong Ling Plaster, and so on for acupoint sticking to treat tumors, and establishes Nu-needle hot-reinforcing method and Ti-Yun reducing method, enriching contents of needling methods, and he is good at application of specific points, established points and channel acupoints to treat refractory diseases with good results.

Study of multi-slice CT perfusion imaging on angiogenesis of VX_2 tumor in rabbits:before and after interventional therapy / 中华放射学杂志

0.05).Three days after interventional therapy,the values of BF,BV,MTT,PS,MVD and VEGF of VX_2 tumors in interventional group were (7.5?2.4)ml? 100g~(-1)?min~(-1),(1.20?0.23)ml/100g,(3.29?0.57)s,(4.0?1.5)ml?100g~(-1)?min~(-1), 16.0?2.4/HP and 0.215?0.008 respectively.Compared with the values of pre-interventional therapy and the control group,there were significant differences among them(P0.7,P0.05)but had a significant negative correlation with average A value of VEGF(r=-0.78,P