Imaging evaluation of cerebrospinal fluid otorrhea associated with inner ear malformation in children / 中华耳鼻咽喉头颈外科杂志

Objective: To explore the imaging evaluation of cerebrospinal fluid (CSF) otorrhea associated with inner ear malformation (IEM) in children. Methods: The clinical data of 28 children with CSF otorrhea associated with IEM confirmed by surgical exploration in Beijing Children's Hospital, from Nov, 2016 to Jan, 2021, were analyzed retrospectively,including 16 boys and 12 girls, aged from 8-month to 15-year and 8-month old, with a median age of 4-year old. The shapes of stapes were observed during the exploration surgery, and the imaging features of temporal bone high resolution CT(HRCT) and inner ear MRI pre- and post-operation were analyzed. Results: In 28 children with CSF otorrhea, 89.3%(25/28) had stapes footplates defect during exploration. Preoperative CT showed indirect signs such as IEM, tympanic membrane bulging, soft tissue in the tympanum and mastoid cavity. IEM included four kinds: incomplete partition type I (IP-Ⅰ), common cavity (CC), incomplete partition type Ⅱ (IP-Ⅱ), and cochlear aplasia (CA); 100%(28/28) presented with vestibule dilation; 85.7%(24/28) with a defect in the lamina cribrosa of the internal auditory canal. The direct diagnostic sign of CSF otorrrhea could be seen in 73.9%(17/23) pre-operative MRI: two T2-weighted hyperintense signals between vestibule and middle ear cavity were connected by slightly lower or mixed intense T2-weighted signals, and obvious in the coronal-plane; 100%(23/23) hyperintense T2-weighted signals in the tympanum connected with those in the Eustachian tube.In post-operative CT, the soft tissues in the tympanum and mastoid cavity decreased or disappeared as early as one week. In post-operative MRI, the hyperintense T2-weighted signals of tympanum and mastoid decreased or disappeared in 3 days to 1 month,soft tissues tamponade with moderate intense T2-weighted signal were seen in the vestibule in 1-4 months. Conclusions: IP-Ⅰ, CC, IP-Ⅱ and CA with dilated vestibule can lead to CSF otorrhea. Combined with special medical history, T2-weighted signal of inner ear MRI can provide diagnostic basie for most children with IEM and CSF otorrhea.HRCT and MRI of inner ear can also be used to evaluate the effect of surgery.

Effectiveness of autologous hematopoietic stem cell transplantation in the treatment of high-risk neuroblastoma in children: a single-center clinical study / 中国当代儿科杂志

OBJECTIVES@#To investigate the effectiveness of high-dose chemotherapy combined with autologous hematopoietic stem cell transplantation (ASCT) in the treatment of children with high-risk neuroblastoma (NB).@*METHODS@#A retrospective analysis was performed on 29 children with high-risk NB who were admitted to Shanghai Children's Hospital and were treated with high-dose chemotherapy combined with ASCT from January 2013 to December 2021, and their clinical features and prognosis were analyzed.@*RESULTS@#Among the 29 children treated by high-dose chemotherapy combined with ASCT, there were 18 boys (62%) and 11 girls (38%), with a median age of onset of 36 (27, 59) months. According to the International Neuroblastoma Staging System, 6 children (21%) had stage III NB and 23 children (79%) had stage IV NB, and the common metastatic sites at initial diagnosis were bone in 22 children (76%), bone marrow in 21 children (72%), and intracalvarium in 4 children (14%). All 29 children achieved reconstruction of hematopoietic function after ASCT. After being followed up for a median time of 25 (17, 45) months, 21 children (72%) had continuous complete remission and 8 (28%) experienced recurrence. The 3-year overall survival rate and event-free survival rate were 68.9%±16.1% and 61.4%±14.4%, respectively. Presence of bone marrow metastasis, neuron-specific enolase ≥370 ng/mL and positive bone marrow immunophenotyping might reduce the 3-year event-free survival rate (P<0.05).@*CONCLUSIONS@#Children with high-risk NB who have bone marrow metastasis at initial diagnosis tend to have a poor prognosis. ASCT combined with high-dose chemotherapy can effectively improve the prognosis of children with NB with a favorable safety profile.

The clinical analysis of 12 patients with immunoglobulin G4 related sialoadenitis and literature review / 中华风湿病学杂志

Objective@#To explore the clinical characteristics of Immunoglobulin G4 (IgG4) related sialoadenitis, to analyze the difference between the IgG4 related sialoadenitis and Sjögren′ syndrome (SS) and to summarize the treatment method and prognosis of the disease, so as to help clinical diagnosis and appro-priate treatment.@*Methods@#According to inclusion criteria and exclusione criteria, we collected 12 cases of IgG4 related sialoadenitis patients and 78 cases of SS patients from the First Affiliated Hospital of Xinjiang Medical University from 2015-2017. The clinical manifestations, laboratory test, pathological examinations, imaging examinations and the effects of treatment of IgG4 related sialoadenitis were retrospectively anal-yzed. Several aspects of the examination were compared with SS. The count data was analyzed by chi-square test or Fisher exact probality using Statistical program for social sciences (SPSS) 19.0 software.@*Results@#Character-istics of IgG4 related sialoadenitis was that one or more pairs of salivary glands and lacimal glands were enlar-ged with increasing serum IgG4 levels and IgG4+ plasma cell infiltration. Compared with SS, sialoadenitis enl-argement (12/12 vs 18/78, χ2=24.339, P<0.01), dry eyes and mouth (9/12 vs 78/78, P<0.01), serum IgG4 (12/12 vs 0/78, χ2=81.554, P<0.01), antinuclear antibodies (1/11 vs 78/78, χ2=71.030, P<0.01), anti-SSA antibody (0/9 vs 68/78,χ2=31.001, P<0.01), anti-SSB antibody (0/9 vs 36/78, χ2=5.311, P=0.021), anti-Ro-52 antibody (0/9 vs 70/78, χ2=35.824, P<0.01), infiltration of IgG4 positive plasma cell (12/12 vs 0/78, χ2=81.554, P<0.01), therapeutic efficacy of glucocorticoid (6/6 vs 0/34, P<0.01) was statistically significant.@*Conclusion@#IgG4 related sialoadenitis has remarkable characteristics in clinical manifestations, serology, pathology and imaging examinations. Although IgG4 related sialoadenitis and SS have many similarities, we still need to diagnose the disease as early as possible and set up a reasonable treatment plan for patients.

The clinical analysis of 12 patients with immunoglobulin G4 related sialoadenitis and literature review / 中华风湿病学杂志

Objective To explore the clinical characteristics of Immunoglobulin G4 (IgG4) related sialoadenitis,to analyze the difference between the IgG4 related sialoadenitis and Sj(o)gren'syndrome (SS) and to summarize the treatment method and prognosis of the disease,so as to help clinical diagnosis and appropriate treatment.Methods According to inclusion criteria and exclusione criteria,we collected 12 cases of IgG4 related sialoadenitis patients and 78 cases of SS patients from the First Affiliated Hospital of Xinjiang Medical University from 2015-2017.The clinical manifestations,laboratory test,pathological examinations,imaging examinations and the effects of treatment of IgG4 related sialoadenitis were retrospectively anal-yzed.Several aspects of the examination were compared with SS.The count data was analyzed by chi-square test or Fisher exact probality using Statistical program for social sciences (SPSS) 19.0 software.Results Characteristics of IgG4 related sialoadenitis was that one or more pairs of salivary glands and lacimal glands were enlarged with increasing serum IgG4 levels and IgG4+ plasma cell infiltration.Compared with SS,sialoadenitis enlargement (12/12 vs 18/78,x2=24.339,P＜0.01),dry eyes and mouth (9/12 vs 78/78,P＜0.01),serum IgG4 (12/12 vs 0/78,x2=81.554,P＜0.01),antinuclear antibodies (1/11 vs 78/78,x2=71.030,P＜0.01),anti-SSA antibody (0/9 vs 68/78,x2=31.001,P＜0.01),anti-SSB antibody (0/9 vs 36/78,x2=5.311,P=0.021),anti-Ro-52 antibody (0/9 vs 70/78,x2=-35.824,P＜0.01),infiltration of IgG4 positive plasma cell (12/12 vs 0/78,x2=81.554,P＜0.01),therapeutic efficacy of glucocorticoid (6/6 vs 0/34,P＜0.01) was statistically significant.Conclusion IgG4 related sialoadenitis has remarkable characteristics in clinical manifestations,serology,pathology and imaging examinations.Although IgG4 related sialoadenitis and SS have many similarities,we still need to diagnose the disease as early as possible and set up a reasonable treatment plan for patients.

The effects of silica dust on the expression of MyD88 and TRAF6 mRNA of lung macrophages in rats / 中华劳动卫生职业病杂志

Objective@#To investigate the effects of silica dust on the expression of Myeloid differentiation factor 88 (MyD88) mRNA and tumor necrosis factor receptor-associated factor (TRAF6) mRNA of lung macrophages in rats.@*Methods@#Selecting 40 SPF-class Wistar rats with average weight (200±20) g randomly divided into control group and 30 d, 60 d, 120 d experimental groups with 10 rats in each group according to body weight. The experimental groups rats were injected with 1 ml of SiO2 (100 mg/ml) suspension through the trachea into lung only once, then they were respectively killed after 30, 60, 120 days. The control group rats were injected with 1 ml of saline into lung, and killed after 120 days. The lungs of the rats were taken for pathological observation. Lung macrophages were extracted and counted, and their activity was detected by MTT. RT-qPCR was used to assess the relative contents of MyD88 mRNA and TRAF6 mRNA.@*Results@#Silica dust inhalation led to infiltration of lung tissue cells, thickening the alveolar wall and destruction of alveolar structure. The longer the exposure to dust, the more obvious the results were. The number of macrophages in all experimental groups and activity in the 30 d, 60 d groups were significantly higher than that in the control group (P<0.05) . Among them, 30 d group had the largest number and the highest activity. Compared with the control group, the expression of MyD88 mRNA and TRAF6 mRNA of lung macrophages in rats increased in the experimental groups (P<0.05) , especially in the 60 d group.@*Conclusion@#Silica dust inhalation can increase the expression of MyD88 and TRAF6 in macrophages, suggesting that silica dust can induce silicosis fibrosis by activating TLR/NF-κB signal pathway.

Multicenter clinical trial of acute lymphoblastic leukemia in elder children and adolescents / 中华血液学杂志

Objective: To analyze the clinical characteristics and long-term outcomes with multicenter study for acute lymphoblastic leukemia (ALL) in children over 10 years old and adolescents. Method: Newly diagnosed ALL patients aged from 10 to 18 years old in three hospitals were included in the study from May 1(st) 2005 to April 30(th) 2015. They were received ALL-2005/2009 protocol following up to December 31(st) 2016. The clinical characteristics, outcomes and the prognostic analysis were evaluated between the two protocols. Results: Totally, 237 patients were involved in the study, 76 cases for ALL-2005 and 161 cases for ALL-2009 protocol. Complete remission (CR) after induction therapy was 94.5%. 64 (28.6%) patients relapsed with a median time of 14.5 months and 70 (29.5%) patients passed away during the following time. In long-term follow-up, the 5-year event-free survival (EFS) and 5-year overall survival (OS) of ALL patients were (63.1±3.3)% and (68.4±3.2)%. The 7-year EFS and OS were (61.0±3.5)% and (67.6±3.3)%.The 5-year EFS of intermediate risk group in ALL-2005 and ALL-2009 protocol were (73.6±6.1)% and (71.7±4.3)% with no difference (χ(2)=0.064, P=0.801). The 5-year EFS of high risk group in two protocols were (27.6±9.6)% and (33.9±9.3)%, showing no significant difference (χ(2)=0.296, P=0.586). Five years relapsed rate of two protocols were (33.8±5.7)% and (32.6±4.1)% with no difference (χ(2)=0.055, P=0.815). The mortalities were 36.8% and 29.8% separately (χ(2)=2.869, P=0.090). Univariate analysis indicated that age, male, risk, BCR/ABL translocation/t(9;22) and resistant to induction were risk prognostic factors in long-term survival (χ(2)=4.764, 4.796, 46.410, 9.560, 25.450; P=0.029, 0.029, <0.001, 0.049, <0.001). Cox multivariate analysis showed male, risk and resistant to induction were independent risk prognostic factors (RR=1.790, 2.727, 2.719; P=0.021, 0.000, 0.012). Conclusion: Protocol ALL-2009 enhanced the chemotherapy intensity in intermediate risk group with no benefit of survival. BCR-ABL fusion or t(9;22) translocation was still the risk factor of prognosis. TKI inhibitor used in these patients could improve survival. EFS rate was increased a little and death rate was decreased in ALL-2009 protocol with no significant lower relapsed rate comparing with ALL-2005 protocol.

Expression and significance of LAT1 and p-s6 breast cancer / 临床与实验病理学杂志

Purpose To investigate the expression and significance of type L amino acid transporter 1 (LAT1 ) and phosphorylated s6 ribosomal protein (p-s6) in breast cancer tissues and their correlation. Methods LAT1 protein and p-s6 protein were detected by immunohistochemical EnVision two step method in 178 cases of breast cancer and 78 cases of benign breast lesion, and the relationship between the expression and clinicopathological parameters was analyzed. Results The positive rate of LAT1 in breast cancer was 36.5％, which was significantly higher than that of breast benign lesion tissues (23.1 ％, P＜ 0.05 ), the positive rate of p-s6 in breast cancer tissues was33.2％, which was significantly higher than that of breast benign lesion tissues (12.8％, P＜0.05). There was a positive correlation between the expression of LAT1 protein and p-s6 protein in breast cancer tissues (r = 0.345, P＜ 0.05). The expression of LAT1 protein in breast cancer was correlated with tumor diameter, axillary lymph node metastasis, TNM staging and HER-2 level (P＜ 0.05), but not associated with the patient's age, histological grade, ER, and PR levels (P＞ 0.05). The expression of p-s6 protein was related to axillary lymph node metastasis, TNM staging, age and ER level (P＜ 0.05), but not associated with tumor diameter, histological grade, PR and HER-2 levels (P＞ 0.05 ). Multivariate analysis showed that the expres sion of LAT1 protein was related to tumor diameter and expression level of HER-2. The expression of p-s6 protein was related to axillary lymph node metastasis. Conclusion The expression of LAT1 protein and p-s6 protein in breast cancer is up-regulated, and the expression of these two proteins is positively related, which implying that LAT1 and p-s6 might play a synergistic role in the development and progression of breast cancer.

Relationship between the expression of TIP30 and clinico-pathological characteristics in extrahepatic cholangiocarcinoma / 中国现代普通外科进展

Objective:To investigate the expression of TIP30 and its relationship with clinico-pathological characteristics in patients with extrahepatic cholangiocarcinoma (ECC).Methods:The expression of TIP30 in 78 cases of ECC tissues and 78 cases of para-cancerous tissues were detected by immunohistochemistry.Results:The positive expression rate of TIP30 was 43.59％ and 75.64％ in ECC tissues and para-cancerous tissues,respectively.Differences were statistically significant (P＜ 0.05).The expression levels of TIP30 were not correlated with age,gender,degree of differentiation and tumor size(P＞0.05),but correlated with lymph node metastasis,distant metastasis and TNM staging(P＜ 0.05).The median overall survival of 78 ECC cases was 14.8 months,and it of TIP30 positive expression cases was 20.3 months,statistically higher than 11.5 months in TIP30 negative expression cases(P＜ 0.01).Conclusion:The downregulation of TIP30 is closely correlated with the development,metastasis and prognosis of ECC.TIP30 may be used as a molecular marker to identify and predict the progression,metastasis and prognosis of ECC.

Midterm clinical outcomes and radiological results of surgical treatment for Hirayama disease / 北京大学学报(医学版)

Objective:To assess the midterm clinical and radiological outcomes of internal fixation and fusion for the treatment of Hirayama disease and to evaluate the clinical significance and value of this procedure.Methods:In the study,36 patients were treated with anterior cervical internal fixation and fusion.The clinical outcomes including muscle strength and atrophy were recorded.The radiological outcomes including range of motion of cervical spine and the cross-sectional area of spinal cord at each level on MRI scan were measured before and at 3 month,1 year and 2 years follow-up time points after surgery.Results:(1) Clinical outcomes:all the patients showed no further progression of symptoms except one patient with mild progression of muscular weakness and atrophy.As the time passed by,the ratio of the patients with muscle strength and atrophy improvement increased.There were 26.5 ％ of patients in 3 months,36.0％ in 1 year and 85.7％ in 2 years who experienced muscle strength improvement.8.8％ of patients in 3 months,24.0％ in 1 year and 35.8％ in 2 years felt muscle atrophy improvement.And 12 of the 14 patients showed improved muscle strength and atrophy at the end of 2 years period follow-up.(2) Radiological outcomes:the range of motion (ROM) of C2-C7 was significantly decreased after the operation.The ROM of preoperation was 62.25° ±2.10° and that of 2 years postoperation was 13.67° ± 7.51°(P ＜ 0.01).The spinal cord was of no compression on flexion MRI.The cross-section area of spinal cord on MRI was significantly increased only at C6 level (P ＜0.05) at the end of three months follow-up.The level of increased cross-section area rose to C4-C5-C6 levels (P ＜0.01) in 1 year and to C4-C5-C6-C7 levels at the end of 2 years follow-up P ＜ 0.05).The cross-section area increased 15.60％ at C4,19.08％ at C5,21.60％ at C6 and 23.91％ at C7 with significant difference (P ＜0.05) 2 years after the operation.Conclusion:Anterior cervical internal fixation and fusion is an effective surgical treatment for Hirayama disease and may provide preferable midterm clinical and radiological outcomes.This procedure has clinical significance and value in terms of control of the progression and outcome of this disease.

Design and application of Shenmen point electronic stimulator for attenuating insomnia and anxiety / 医疗卫生装备

Objective To design and manufacture a Shenmen point electronic stimulator and determine its therapeutic effects for insomnia and anxiety.Methods The stimulator was composed of a single point electrode unit and an electronic stimulation generator.The single point electrode unit consisted of a circular transdermal patch and two circular electrodes which was used for precision stimulation on Shenmen point.The electronic stimulation generator released low-frequency square-wave pulse current based on specific parameters to treat the examinees with insomnia and anxiety.The curative effect of the stimulator was tested by Hamilton rating scale for anxiety and evaluation on improved sleeping.Results The stimulator executed precision stimulation based on specific requirements on the point.30-min treatment with the stimulator before sleeping in 10 d contributed to significantly decreasing Hamilton rating scores for anxiety and improving sleeping quality.Conclusion The stimulator markedly attenuates anxiety and insomnia,and can be a convenient,effective and safe choice for adjunctive therapy of insomnia and anxiety.

Design and application of Shenmen point electronic stimulator for attenuating insomnia and anxiety / 医疗卫生装备

Objective To design and manufacture a Shenmen point electronic stimulator and determine its therapeutic effects for insomnia and anxiety.Methods The stimulator was composed of a single point electrode unit and an electronic stimulation generator.The single point electrode unit consisted of a circular transdermal patch and two circular electrodes which was used for precision stimulation on Shenmen point.The electronic stimulation generator released low-frequency square-wave pulse current based on specific parameters to treat the examinees with insomnia and anxiety.The curative effect of the stimulator was tested by Hamilton rating scale for anxiety and evaluation on improved sleeping.Results The stimulator executed precision stimulation based on specific requirements on the point.30-min treatment with the stimulator before sleeping in 10 d contributed to significantly decreasing Hamilton rating scores for anxiety and improving sleeping quality.Conclusion The stimulator markedly attenuates anxiety and insomnia,and can be a convenient,effective and safe choice for adjunctive therapy of insomnia and anxiety.

Simvastatin protect retinal ganglion cells against optic nerve crush in mice / 眼科新进展

Objectivc To investigate the protective effect of simvastatin on retinal ganglion cells (RGC) after optic nerve crush (ONC).Methods Together 50 Kunming mice were randomly divided into normal group,sham group,ONC group and simvastatin protection group.The mice in the normal group were untreated,the sham group was treated with the exposure of the optic nerve without injury,the ONC group mice underwent ONC operation on the left eyes,followed by intravitreal administration of equilibrium solvent [50 mg · mL-1 ethanol plus 1 mol · L-1 NaOH,which were activated by 1 mol · L-1 HC1 (pH 7.2)],and the simvastatin protection group was intravitreally injected different concentrations of simvastatin (0.5 g · L-1,1.0 g · L-1,1.5 g · L-1) after ONC operation.Brn3a immunofluorescence staining,HE staining and toluidine blue staining were used to detect the apoptosis of RGC and pathological changes of optic nerve.Results On day 7 after operation,in the ONC group,the apoptosis of RGC was observed obviously,with the survival rate dropping to (35.1 ± 3.9) ％,and the thickness from the retinal ganglion cell layer to outer nuclear layer was decreased from (123.13 ± 1.04) μm to (97.48 ± 2.33) μm,which was significantly thinner than that in the control group (P ＜ 0.01);moreover,the fibrous bundle of optic nerve disappeared,and the neuroglial cells were clustered into groups,as well as the axons showed swelling and serious degeneration,but after intravitreal injection of 1.0 g · L-1 simvastatin,the survival rate of retinal ganglion cells increased to (76.3 ± 3.7) ％ (P ＜ 0.05),and the aforementioned thickness was increased to (111.39 ± 4.06) μm,which was statistically significant when compared with the ONC group (P ＜ 0.01).The degeneration of optic nerve was improved,and the structure of neuroglial cell axons and the nerve fibers became normal.Conclusion Simvastatin can reduce the optic nerve degeneration and improve the survival rote of retinal ganglion cells.

Study of intracellular location of adenovirus protein IX with correlative light and electron microscopy based on miniSOG / 中华实验和临床病毒学杂志

Objective@#To establish a method of correlative light and electron microscopy (CLEM) to study the intracellular location of adenovirus protein IX.@*Methods@#MiniSOG (mini singlet oxygen generator) is a recently-invented genetically-encoded tag for CLEM. MiniSOG-fused adenovirus IX gene (IXSOG) was cloned by PCR, and inserted into pcDNA3 plasmid to form pTPL-IXSOG, which was used to transfect 293 cells. IXSOG expressing cells could be distinguished under fluorescence microscope due to the emission of green fluorescence of miniSOG. The transfected cells were fixed in 2.5% glutaraldehyde in situ, stained with diaminobenzidine(DAB) through the photooxidation activity of miniSOG, and used to prepare ultrathin sections. Intracellular location of IXSOG was studied by observing the sections under transmission electron microscope.@*Results@#Eukaryotic expression plasmid carrying IXSOG fusion gene was constructed. IXSOG expressing cells were selected for DAB photooxidation and preparation of ultrathin sections. IXSOG fusion mainly formed punctate aggregations or inclusions in the nucleus.@*Conclusions@#The correlative light and electron microscopy method based on miniSOG was successfully established, and it could be used to study the intracellular localization of viral proteins.

Platelets Decrease the Sensitivity of Leukemia Cell L1210 to Multiple Drugs via Activiting The AKT and ERK Signalling Pathway / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To explore the effect of platelets on signal transducers and the sensitivity of leukemia cells to chemotherapeuticl drugs in leukemia cells L1210.</p><p><b>METHODS</b>Murine platelets were prepared and cocultured with leukemia L1210 cells, and the aggregation between them was observed by flow cytometry. The levels of several transducer proteins in leukemia cells were analyzed with Western blot. In some experiments, methotrexate, vincristine or doxorubicin was added to the coculture system and the cell proliferation was measured by using CCK8 colorigenic methods to detect the sensitivity of leukemia cells to the therapeuticals drugs.</p><p><b>RESULTS</b>Platelets, either freshly prepared or fixed with 1% paraformaldehyde, aggregated with leukemia cells. Both fresh and fixed platelets increased the level of phosphorylation of AKT and ERK in leukemia cells as measured with Western blot. Also, platelets significantly decreased the sensitivity of 3 therapeutics to L1210 cells.</p><p><b>CONCLUSION</b>Platelets may bind with L1210 cells and decrease the sensitivity of the leukemia cells to chemotherapeutics, possibly by activating the AKT and ERK signaling pathways.</p>

Influence of fenofibrate on tissue NF-KB, IL-6 and cell apoptosis in secondary brain injury after traumatic brain injury in rats / 中国医师杂志

Objective To investigate the changes of NF-κB p65, IL-6 and cell apoptosis in sec-ondary brain injury after traumatic brain injury and the influence of fenofibrate on these parameters in rats. Methods Ninety-eight male Sprague-Dawley ( SD) rats were randomly divided into two groups:fenofibrate group ( n =49) and control group ( n =49) .The fenofibrate group was induced with the improved Feeney method and received intragastrica of lipanthyl 60 mg/(kg? d) immediately after injury.The control group were received intragastrica of sodium chloride injection 2 ml/( kg? d) immediately after injury and twice everyday until rats were killed.Each group was divided into seven subgroups by sacrificed time after injury, those were 1 h, 3 h, 6 h, 12 h, 24 h, 3 d, and 7 d, and each subgroup got 7 rats.Each subgroup was ran-domly selected three rats after being killed to detect expressions of NF-κB p65 and IL-6 of rat contusion peri tissues brain tissues with immunohistochemical method.While using terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling ( TUNEL) method was used to observe the peri cell apoptosis after brain contusion.Results The expressions of NF-κB p65 and the IL-6 in each fenofibrate group were significantly decreased relative to the control group ( P <0.05),and a significant positive correlation between both pa-rameters in two groups ( P <0.01) .At the same time, the number of apoptotic cells was decreased ( P <0.05).Conclusions Fenofibrate was probably through the route of relieving inflammation response to re-duce the change of secondary brain injury after traumatic brain injury and decrease neural cell apoptosis, and then provide protection of neurocytes.

Expression Changes of Matrix Reconstitution-related Genes in Bone Marrow during 5-Fluorouracil-Induced Hemopoietic Injury and Their Significance / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To explore the expression change of the genes related with matrix reconstitution during the injury and reconstitution of murine bone marrow following treatment with 5-fluorouracil (5-FU).</p><p><b>METHODS</b>C57BL/6 mice received intraperitoneal injection of 5-FU (200 mg/kg), and peripheral blood cell counts were monitored at 3, 6, 9, 15, 21, 27 days after treatment. Bone marrow cells were harvested at these times for total RNA extraction using TRIzol. Reverse transcriptions in combination with real-time PCR were performed for detecting expression of genes related with matrix reconstitution, including ECM-1, MMP-2, MMP-3, MMP-13 and TIMP-1.</p><p><b>RESULTS</b>After injection of 5-FU, the numbers of three line cells in peripheral blood (i.e. RBC, WBC and platelets) decreased and then recovered with differential dynamics. Similarly, RT-qPCR revealed that all the 5 detected gene expressions were significantly up-regulated during the injury. The mRNA expression of MMP-2 reached to peak at day 3 while the other genes reached to peak at day 6. MMP-3 has a low expression when compared with others, but its expression increased significantly after injury.</p><p><b>CONCLUSION</b>In 5-FU induced hematopoietic injury and reconstitution model, matrix reconstitution-related genes may play an important role in hematopoietic reconstitution, but different genes play different roles at various time, and cooperate with each other for hematopoietic reconstitution.</p>

Effects of Trimetazidine on Cardiac Function and Heart Rate Turbulence in Coronary Heart Disease and Chronic Heart Failure / 中国康复理论与实践

@#Objective To evaluate the effects of trimetazidine on cardiac function and autonomic function in patients with coronary heart disease and chronic heart failure. Methods 73 patients with coronary heart disease and chronic heart failure were randomly divided into control group (conventional therapy, n=35) and trimetazidine group (conventional therapy plus oral trimetazidine, n=38). All the patients underwent echocardiography for left ventricular ejection fraction (LVEF) and left ventricular end-diastolic diameter (LVd), and 24-hour Holter electrocardiogram for heart rate turbulence (HRT) indexes, turbulence onset (TO) and turbulence slope (TS) were calculated before and 3 months after treatment. Results 3 months after treatment, LVEF increased, and LVd shrank in both groups (P<0.01). LVEF improved better in the trimetazidine group than in the control group (P<0.001). TO decreased and TS increased in the trimetazidine group (P<0.05). Only TO decreased in the trimetazidine group (P<0.05). TO and TS improved better in the trimetazidine group than in the control group (P<0.05). Conclusion Trimetazidine could improve cardiac function and autonomic function in patients with coronary heart disease and chronic heart failure.

Chondrogenesis of synovial mesenchymal stem cells co-cultured with chondrocytes on the three-dimensional scaffold / 中国组织工程研究

BACKGROUND:Articular chondrocytes with the ability of autocrine and paracrine can provide the growth factors and microenvironment for synovial mesenchymal stem cels differentiating into the chondrocyte. The three-dimensional scaffold could provide space for cels adhesion, proliferation and differentiation. OBJECTIVE: To study the ability of chondrogenesis by co-culturing synovial mesenchymal stem cels and chondrocytes under the three-dimensional condition. METHODS:The synovial membrane and articular cartilage were harvested from rat knee joint. The synovial mesenchymal stem cels and chondrocytes were obtained through the method of enzyme digestion. The passage 3 synovial mesenchymal stem cels and passage 2 chondrocytes were co-cultured in the chitosan/I colagen composite scaffolds at the ratio of 1:2. Then, the cels/scaffold composite was harvested to be examined morphologicaly, histologicaly and immunohistochemicaly after being cultured 21 days. The confocal laser was also employed to detect the cels distribution in the scaffold. RESULTS AND CONCLUSION: After being cultured 72 hours, it could be observed from the cels/scaffold composite examined through the scanning electron microscope that the cels adhered on the surface of the scaffold and extracelular matrix surrounding the cels was seen on the scaffold. After being cultured 21 days, it could be found through the confocal laser scanning that the cels were wel-distributed on the scaffold, and cels decreased gradualy. Type II colagen was positive in the extracelular matrix immunohistochamicaly. It suggested from this study that the synovial mesenchymal stem cels could be co-cultured with chondrocytes in the chitosan/I colagen composite scaffolds and have the ability of chondrogenesis differentiation.

Chondrogenic differentiation of rat synovial-derived mesenchymal stem cells / 中国组织工程研究

BACKGROUND:Compared with other sources of mesenchymal stem cells, synovial-derived mesenchymal stem cells have significant characteristics of chondrogenesis and cloning. Therefore, synovial-derived mesenchymal stem cells are one of the most promising seed cells in cartilage tissue engineering. OBJECTIVE:To isolate and culture synovial-derived mesenchymal stem cells of Sprague-Dawley rats, identify the multipotential differentiation and the potential ability of chondrogenic differentiation in three-dimensional culture condition. METHODS:The synovium tissue was harvested from Sprague-Dawley rats. The synovial-derived mesenchymal stem cells were isolated with typeⅠcol agen enzyme digestion method and cultured in vitro. The passage 3 cells were detected with giemsa staining, the cellcycle, adipogenic and osteogenic differentiation were determined. The passage 3 cells were centrifuged as pel ets and cultured in the chondriogenic medium for 21 days. And the pel ets were examined by toluidine blue staining, typeⅡcol agen immunohistochemical staining and RT-PCR. RESULTS AND CONCLUSION:The mesenchymal stem cells isolated from the synovium tissue of rats have the characteristics of mesenchymal stem cells, and exhibit fibroblast-like morphology after cultured in vitro. The multilineage differentiation potentials were also revealed. After the cellwere cultured in chondrogenic medium for 21 days, chondroid tissue was found, type II col agen and aggrecan could be detected positively by toluidine blue staining, typeⅡcol agen immunohistochemical staining, and expressed by RT-PCR examination. Therefore, synovial mesenchymal stem cells have a chondrogenic differentiation potential.

Chondrocyte supernatant induces chondrogenesis and pellet cultivation of rat synovial mesenchymal stem cells / 中国组织工程研究

BACKGROUND:Synovial mesenchymal stem cells have the ability of multilineage differentiation in vitro, which are expected to be seed cells for the treatment of cartilage defects in cartilage tissue engineering. Appropriate growth factors are critical for the chondrocyte differentiation of synovial mesenchymal stem cells. OBJECTIVE:To study the role of secreted factors by chondrocytes to induce chondrogenesis of synovial mesenchymal stem cells. METHODS:The synovial mesenchymal stem cells and chondrocytes were harvested from rat knee joints and cultured through the digestion method. The supernatant was col ected from chondrocytes, and centrifuged, filtered and cryopreserved. The third passage synovial mesenchymal stem cells centrifuged as pel ets were cultured in the chondrocyte supernatant for 21 days. And the cells morphology was examined and the type II col agen and aggrecan were detected through immunohistochemistry and RT-PCR. RESULTS AND CONCLUSION:The synovial mesenchymal stem cellpel ets cultured in the chondrocyte supernatant became cartilage-like tissue after 21 days. The type II col agen was detected positively in the matrix of synovial mesenchymal stem cellpel et immunohistochemical y. RT-PCR examination showed that the type II col agen and aggrecan expressed in the synovial mesenchymal stem cellpel et cultured in the chondrocyte supernatant. It suggested that synovial mesenchymal stem cellcould be induced to differentiate into chondrocytes depending on soluble factors secreted by chondrocytes.