Effect of high-frequency repetitive transcranial magnetic stimulation in M1 region combined with dorsolateral prefrontal cortex on electroencephalogram θ frequency band amplitude of patients with neuropathic pain after spinal cord injury / 中国康复理论与实践

ObjectiveTo explore the efficacy of high-frequency repetitive transcranial magnetic stimulation (rTMS) in M1 region combined with dorsolateral prefrontal cortex (DLPFC) on electroencephalogram (EEG) θ frequency band amplitude of patients with neuropathic pain (NP) after spinal cord injury. MethodsFrom June, 2022 to June, 2023, 50 NP patients after SCI in Qingdao University Affiliated Hospital were included and divided into M1 region stimulation group (n = 25) and M1 region combined with DLPFC stimulation group (the combined stimulation group, n = 25). M1 region stimulation group received 10 Hz rTMS in the left M1 region, while the combined stimulation group received same stimulation in left M1 region combined with DLPFC, for three weeks. Before and after intervention, the pain was assessed with Short Form of McGill Pain Questionnaire (SF-MPQ), the depression and anxiety status were evaluated using Hamilton Depression Scale (HAMD) and Hamilton Anxiety Scale (HAMA), and the EEG θ frequency band amplitude was recorded to detect the changes of brain electrophysiological activity. ResultsFour cases in M1 region stimulation group, and two cases in the combined stimulation group were dropped. After intervention, the total score of SF-MPQ and the scores of the subscales, the scores of HMMD and HAMA decreased in both groups (|t| > 2.523, P < 0.05). The EEG θ frequency band amplitude significantly reduced in the prefrontal and frontal regions in M1 region stimulation group (|t| > 5.243, P < 0.001), and it also significantly reduced in the prefrontal, frontal regions, central and parietal regions in the combined stimulation group (|t| > 4.630, P < 0.001). All the scores were lower (|t| > 2.270, Z = -1.973, P < 0.05), and the EEG θ frequency band amplitude in the prefrontal, frontal regions, central and parietal regions were lower (P < 0.05) in the combined stimulation group than in M1 region stimulation group. ConclusionHigh frequency rTMS is an effective analgesic method on NP after SCI, which can improve their depression and anxiety symptoms and reduce the EEG θ frequency band amplitude. Compared with M1 region rTMS stimulation, the combination of M1 region and DLPFC rTMS is more effective.

Genotype and Phenotype of α-Thalassemia Fusion Gene in Huadu District of Guangzhou, Guangdong Province of China / 中国实验血液学杂志

OBJECTIVE@#To explore the carrier rate, genotype and phenotype of α-thalassemia fusion gene in Huadu district of Guangzhou, Guangdong province of China, and provide data reference for the prevention and control of thalassemia.@*METHODS@#A total of 10 769 samples who were screened for thalassemia in Maternal and Child Health Hospital of Huadu District from July 2019 to November 2020 were analyzed retrospectively. Blood cell analysis and hemoglobin (Hb) electrophoresis were performed. Thalassemia genes were analyzed by gap-PCR and PCR-reverse dot blot hybridization (PCR-RDB).@*RESULTS@#A total of 9 cases with α-thalassemia fusion gene were detected in 10 769 samples (0.08%). There were 7 cases with fusion gene heterozygote, 1 case with compound of α-thalassemia fusion gene and Hb G-Honolulu, 1 case with compound of α-thalassemia fusion gene and Hb QS. The MCV results of 4 samples of blood cell analysis were within the reference range, the Hb A2 value of 1 case was decreased, and there were no other abnormalities found.@*CONCLUSION@#The α-thalassemia fusion gene is common in Huadu district of Guangzhou, and heterozygotes are more common, and current screening methods easily lead to misdiagnosis.

Effect of Different Collateral Bleeding Methods on TNF-α in Peripheral Blood of Cervical Spondylosis of Nerve Root Type / 上海针灸杂志

Objective To study the difference between scattered prick with three-edge needle and tapping prick with plum-blossom needle (seven-star needle) in treating cervical spondylosis of nerve root type by observing the content of serum tumor necrosis factor-α (TNF-α) in patients' peripheral blood. Method Sixty patients with cervical spondylosis of nerve root type were randomized into a three-edge needle group and a plum-blossom needle group. The three-edge needle group was intervened by scattered prick with three-edge needle, while the plum-blossom needle group was intervened by plum-blossom needle. The two groups were treated once a week, for 4 weeks in total. The level of TNF-αin serum of the two groups was measured before and after the treatment, and the clinical efficacies were compared. Result The level of serum TNF-α changed significantly after the treatment in both groups (P<0.05), but there was no significant between-group difference in comparing the level of serum TNF-α after the intervention (P>0.05). The between-group difference in the clinical efficacy was statistically insignificant (P>0.05). Conclusion Both three-edge needle and plum-blossom needle can significantly down-regulate the content of serum TNF-α in peripheral blood, and there is no noticeable difference between the two methods.

The effect of calcium dobesilate on creatinine measurement by sarcosine oxidase assay / 中华检验医学杂志

Objective To investigate the interference effect of calcium dobesilate on serum creatinine levels by Sarcosine oxidase-based assay.Methods 1.Interference test in vivo:Ten patients with chronic renal diseases from Huangshi second hosptial were recruited.Serum creatinine (sarcosine oxidase method,Scr1 ; deiminase method,Scr2),urea,and cystatin C were detected and compared before and after one week administration of calcium dobesilate; 2.Interference test in vitro:to detect whether 100 mg/L calcium dobesilate has any interference with Scr1 and Scr2; 3.Dose-dependent interference test:To detect the interference effect of different concentrations of calcium dobesilate (1.25-20.0 mg/L) on different creatinine concentrations (404.5 μmol/L or 65.9 μmoL/L) measured by sarcosine oxidase assay.Bias within 3.5％ or 6.63 μmol/L of creatinine levels was clinically acceptable.Statistical comparisons were made using Wilcoxon rank-sum test.Results There was significant difference of sarcosine oxidase-based serum creatinine levels between before and after one week administration of calcium dobesilate (P ＜ 0.05),while no significant differences were observed for deiminase-based serum creatinine levels,urea and estimated GFR values (P ＞ 0.05).Interference test showed that 95％ confidence interval of interventional value (Dobs) of calcium dobesilate (100 mg/L) was (-173.9 ± 2.86) μmol/L for the sarcosine oxidase assay and (1.21 ± 3.14) μmol/L for deiminase method,indicating that calcium dobesilate caused a significant negative effect on the former enzymatic assay but not the latter one.In the dose effect interference test of calcium dobesilate,the regression equations were:Y =-2.7649X-0.0782 (R2 =0.998,F =7943.4,P =0.000) for high creatinine levels and Y =0.0263X2-1.6394X-0.2754 (R2 =0.996,F =2546.7,P =0.000) for low creatinine levels.The interference effect was less than the predetermined d with the calcium dobesilate concentrations of 4.4 mg/L in high concentration specimen and 3.5 mg/L in low concentration specimen.Conclusions Calcium dobesilate has a significant negative interference with serum creatinine detected by the sarcosine oxidase method,which leads to the bias of creatinine in patients with renal insufficiency.Hence,sarcosine-oxidase-based creatinine levels should be cautious when calcium dobesilate was used,and further check with another assay is necessary if possible.

Study on molecular epidemiology of major pathogenic Streptococcus suis serotypes in middle part of Jiangsu province / 中华流行病学杂志

<p><b>OBJECTIVE</b>To determine the prevalence of Streptococcus suis and major pathogenic serotypes in middle part of Jiangsu province.</p><p><b>METHODS</b>Tonsillar specimens from 303 slaughtered pigs aged 6 to 8 months were investigated for the presence of Streptococcus suis and major pathogenic serotypes by polymerase chain reaction (PCR) method. Bacteriological examination compared with molecular genetics identification for three Streptococcus suis isolates were also done.</p><p><b>RESULTS</b>The overall carrier rate of Streptococcus suis was up to 88.0%, with the percentages of serotype 1(14), 2(1/2), 7 and 9 were 9.6%, 8.5%, 11.3% and 29.5% respectively in 2005. While in 2006, the prevalence of Streptococcus suis was 82.5%, with capsular types 1 (14), 2 (1/2), 7 and 9 were accounted for 17.6%, 2.4%, 25.8% and 20.0% of all the specimens. All the three isolates belonged to Streptococcus suis serotype 2,named 2a, 2f and 14e, which exhibiting the virulent phenotype cps2+/gdh+/mrp-/lepf-/sly-/fbps+/orf2+/89k-, cps2+/lgdh+/mrp-/epf-/sly-/fbps-/orf2-/89k- and cps2+/gdh+/mrp-/epf-/sly-/fbps/orf2-/ respectively. These isolates were all susceptible to amoxicillin, ampicillin, penicillin and resistant to amikacin and tetraycline. Clinical signs were not noted in BALB/c mice and rabbit.</p><p><b>CONCLUSION</b>Prevalence of the Streptococcus suis among the healthy herds in the areas was very high, with various capsule types of Streptococcus suis involved in the same herds, and the virulent phenotype of these 3 isolates were very different from those prevalent Streptococcus suis serotype 2 virulent isolates frequently discovered from the epidemic areas.</p>

Construction of RevS gene knock-out mutant of Streptococcus suis serotype 2 / 中华流行病学杂志

<p><b>OBJECTIVE</b>To construct a gene knock-out mutant of response regulator named RevS in Streptococcus suis serotype 2 virulent strain 05ZYH33, and to investigate the effects of its deletion on the biological characters of this pathogen and the pathogenesis to mice and piglets.</p><p><b>METHODS</b>Recombinant gene knock-out vector consisting of Spc(r) cassette was constructed and flanking was constructed consisting of Spc(r) cassette with flanking homology regions to the RevS genes while the isogenic RevS-deficient mutant was screened by allelic replacement. The effects of RevS deletion on the basic biological characters of 05ZYH33 including growth stability, colonial morphology, haemolysis, Gram staining, growth curve and protein expression were examined in vitro. The mice and piglets were infected with 10(8) CFU wild virulent and mutant isolates.</p><p><b>RESULTS</b>PCR analysis confirmed that the coding genes of RevS were replaced completely by Spc(r) cassette and the basic biological characters of 05ZYH33 did not undergo any apparent change. Balb/c mice infection assay indicated that RevS play a role in the pathogenesis of Streptococcus suis infections, while no remarkable difference was observed in the piglets' pathogenesis infection rates between mutant isolates deltaA05ZYH33 and wild-type isolates 05ZYH33.</p><p><b>CONCLUSION</b>The mutant of Streptococcus suis 05ZYH33 response regulator was successfully constructed, while the mutation did not obviously affect the bacterial biological characters, while the knock-out mutant of RevS was shown to be attenuated in pathogenesis to mice and piglets.</p>

Surveillance of Antimicrobial Resistance of Klebsiella pneumoniae in Nosocomial Infections During 1999-2004 / 中华医院感染学杂志

OBJECTIVE A surveillance study was performed for nosocomial infections in order to investigate the change in antimicrobial resistance of Klebsiella pneumoniae,especially the strains isolated from 1999 to 2004.METHODS K-B test was used for the antibiotics susceptibility test and the results were read based on National Committee for Clinical Laboratory Standards(NCCLS) of the USA.The situation of ESBLs-producing strains of K.pneumoniae was investigated.RESULTS Totally 326 K.pneumoniae strains showed the highest susceptibility to imipenem.Ceftazidime,cefepime,and cefoperazone/sulbactam also showed excellent activity against K.pneumoniae.The prevalence of ESBLs from 326 strains was 20.2%.CONCLUSIONS It is important to study the drug resistance in nosocomial infections by K.pneumoniae.

A field trial study on the influence of different salt iodine concentration on urinary iodine excrition among the target population / 中华流行病学杂志

<p><b>OBJECTIVE</b>To evaluate the influence of different salt iodine concentration on urinary iodine excrition among the target population and to determine the appropriate level of salt iodization to the local people.</p><p><b>METHODS</b>In the 31-day random control trial, 1099 subjects from 399 families were randomly distributed into four groups and were supplied with iodized-salt with different iodine concentration of (6 +/- 2)mg/kg, (15 +/- 2)mg/kg, (24 +/- 2)mg/kg and (34 +/- 2)mg/kg, respectively. The original family salt was retrieved, whose iodine content was determined in those subjects' families with single-blind method. Baseline survey was conducted including salt and urinary iodine of the subjects. From the 27th day after the intervention, the urinary samples of the subjects were continuously collected for 5 days and urinary iodine was tesed respectively. Meanwhile, daily meal investigation was conducted to evaluate the influences originated from food.</p><p><b>RESULTS</b>The median of local water iodine content was 3.05 microg/L and the average salt iodine concentration was (36.4 +/- 5.4)mg/kg while 98.8% of the household consumed sufficient iodized-salt. The medians of baseline urinary iodine of the subjects were 293.6 microg/L in city, and 508.8 microg/L in the countryside. The urinary iodine medians of four groups in the day of 28th after intervention were 97.2 microg/L, 198.6 microg/L, 249.4 microg/L, and 330.7 microg/L respectively in the city group, while they were 100.5 microg/L, 193.0 microg/L, 246.3 microg/L and 308.3 microg/L seperately in the countryside group. There was no statistically significant differences among the medians of urine iodine in the 27th, 28th, 29th, 30th and 31st day after intervention (P > 0.05).</p><p><b>CONCLUSIONS</b>The target areas were with iodine deficiency which possessed high coverage of qualified iodized-salt at household level. The average urinary iodine level of the subjects was slightly higher than the standard level, according to the baseline survey. The intervetion trail showed that the salt iodine concentration of 15-24 mg/kg was sufficient to the local people.</p>

Study on graft-versus-host disease in the allogeneic peripheral blood stem cell transplantation for the treatment of leukemia / 中华血液学杂志

<p><b>OBJECTIVE</b>To analyze the incidence and the effective prevention and treatment of graft-versus-host disease (GVHD) for the allogeneic peripheral blood stem cell transplantation (allo-PBSCT) for the treatment of leukemia.</p><p><b>METHODS</b>Fifty patients with acute leukemia (n = 29) and chronic myeloid leukemia (n = 21) were treated with allo-PBSCT. The conditioning regimens were TBI plus CTX and Vp16 or TBI plus CTX. Two regimens were used for prophylaxis of GVHD: one was the combination of low dose cyclosporine (CsA, 2 - 3 mg x kg(-1) x d(-)1 i.v. or 4 - 6 mg x kg(-1) x d(-1) p.o.) and short course methotrexate (MTX, 15 approximately 10 mg, +1, +3, +6, +11 d) (CsA/MTX group, 32 patients), the other was short course of mycophenolate mofetil (MMF, 1.0 bid, +1 - +28 d) in addition to CsA and MTX (MMF/CsA/MTX group, 18 patients).</p><p><b>RESULTS</b>All patients were successfully engrafted and the median times to ANC > 0.5 x 10(9)/L and to platelet > 20 x 10(9)/L were 14 (10 - 22) and 20 (10 - 68) days post PBSCT respectively. The incidence of acute GVHD (aGVHD) was 40% (20/50) and of grade III - IV was 12% (6/50). The chronic GVHD (cGVHD) occurred in 22 out of 33 (66.7%) evaluable patients (survived longer than 6 months post PBSCT) and extensive cGVHD in 11 out of 33 (33.3%) patients. Patients with aGVHD displayed significantly higher sIL-2R levels [(277.3 +/- 26.4) U/L] and CD(25)(+) cells [(8.1 +/- 3.4)%] than those without GVHD [(128.1 +/- 96.7) U/L and (3.6 +/- 1.7)%] (P < 0.05). The incidences of aGVHD (16.7%) and extensive cGVHD (9.1%) in MMF/CsA/MTX group were significantly lower than that in CsA/MTX group (53.1% and 45.5%, P < 0.05). The median follow-up duration was 30 (3 - 70) months and 33 patients were still alive. The relapse rate was significantly higher in GVHD negative group (47.1%) than in GVHD positive group (0, P < 0.05). The 3 year disease-free-survival (DFS) rate was 66%.</p><p><b>CONCLUSION</b>The incidence of aGVHD was low, but of cGVHD was high in allo-PBSCT. sIL-2R and CD(25)(+) cells after PBSCT may provide predictive markers for aGVHD. The MMF/CsA/MTX regimen for prevention of aGVHD in allo-PBSCT is more effective than the CsA/MTX one. There was a strong antileukemic effect of GVHD in the allo-PBSCT.</p>

Study on nonmyeloablative allogeneic bone marrow transplantation in the treatment of L615 leukemia mice / 中华血液学杂志

<p><b>OBJECTIVE</b>To establish strategies for preventing graft versus host disease (GVHD) and reducing treatment associated morbidity while preserving graft versus leukemia (GVL) effect in nonmyeloablative allogeneic bone marrow transplantation (allo-BMT), with or without donor lymphocyte infusion (DLI) after BMT.</p><p><b>METHODS</b>3 x 10(7) bone marrow cells mixed with 1 x 10(7) spleen cells from the same BALB/c mouse were transplanted into the nonablative irradiated inbred 615 mouse which received a single subcutaneous injection of 1 x 10(6) L615 leukemia cells three days before. The experiments were designed as follows (ten mice in each group): myeloablative BMT control group (group A), nonmyeloablative conditioning without BMT group (group B), nonmyeloablative BMT group (group C), and nonmyeloablative BMT + DLI group (group D). GVL effects were assessed by survival time, white blood cell count and L615 cells in peripheral blood and histologic changes. GVHD was assessed by signs of weight loss, ruffled fur, diarrhea and histologic changes of skin, liver and small intestines. Chimerism was detected by cytogenetic analysis and PCR technique.</p><p><b>RESULTS</b>The survival time of group A, B, C and D was (20.3 +/- 13.4), (15.9 +/- 1.1), (21.6 +/- 1.7) and (37.8 +/- 2.0) days, respectively, being no significant difference between group A and group C (P > 0.05). The survival time of group C was longer than that of group B (P < 0.01). And among group B, C and D, group D had the longest survival time (P < 0.01). GVHD signs and histologic changes were observed in 60% of control group mice at + 14 day, but none of group C and group D. 40% of mice in group A died of treatment associated morbidity within two weeks, but none in group C and group D. Allogeneic chimerism was kept in group A, but excluded gradually in group C.</p><p><b>CONCLUSION</b>GVL effect seems preserved in nonmyeloablative BMT mice, but weaker than that in myeloablative BMT mice. GVL effect seems to be enhanced by DLI after nonmyeloablative BMT. GVHD and transplantation associated morbidity seems to be reduced in nonmyeloablative BMT.</p>

Role of interleukin-18 in pathogenesis of acute graft-versus-host disease / 中国实验血液学杂志

To investigate the relationship between interleukin-18 (IL-18) and human acute graft-versus-host disease (aGVHD), 26 patients undergoing allogeneic peripheral blood stem cell transplantation (allo-PBSCT) were included in this study. IL-18 secreted by peripheral blood mononuclear cells (MNCs) was measured by enzyme-linked immunosorbent assay (ELISA) before transplantation and during aGVHD. The results showed that grade I GVHD and grades III-IV GVHD developed in 10 and 5 cases, respectively. The levels in the supernatants of MNCs from patients with aGVHD were significantly higher than those in the cases without aGVHD. The levels of IL-18 were correlated with the severity of aGVHD. It is concluded that IL-18 plays an important role in the development of aGVHD.

Fetal bone marrow stromal cells support the in vitro expansion of human hematopoietic bone marrow progenitor cells: requirement for cell-to-cell interactions and colony-stimulating factors / 第二军医大学学报

Objective： To elucidate the role of bone marrow stromal cells in cooperation with exogenous cytokines in hematopoiesis. Methods： Fetal bone marrow stromal cells (FBMSC) was combined with cytokines including SCF,IL-3,IL-6,GM-CSF in a 5-day liquid culture system of adult bone marrow mononuclear cells, then we cultured bone marrow derived CD34+-enriched cells with FBMSC+SCF+IL-3+IL-6+G-CSF+EPO for 2 weeks. Results：FBMSC were in good cooperation with above mentioned exogenous cytokines. When CD34+-enriched cells from adult bone marrow were cultured with combinations of FBMSC, SCF, IL-3, IL-6, G-CSF and EPO, total nucleated cells, CFU-GM, BFU-E and CD34+ cells were increased by 119.6±30.9, 54.6±17.4, 25.2±4.4, 11.1±4.2 folds, respectively. Conclusion：FBMSC in cooperation with exogenous cytokines support the in vitro expansion of human hematopoietic progenitor cells efficiently.

Fetal bone marrow stromal cells support the in vitro expansion of human hematopoietic bone marrow progenitor cells: requirement for cell-to-cell interactions and colony-stimulating factors / 第二军医大学学报

Objective： To elucidate the role of bone marrow stromal cells in cooperation with exogenous cytokines in hematopoiesis. Methods： Fetal bone marrow stromal cells (FBMSC) was combined with cytokines including SCF,IL-3,IL-6,GM-CSF in a 5-day liquid culture system of adult bone marrow mononuclear cells, then we cultured bone marrow derived CD34+-enriched cells with FBMSC+SCF+IL-3+IL-6+G-CSF+EPO for 2 weeks. Results：FBMSC were in good cooperation with above mentioned exogenous cytokines. When CD34+-enriched cells from adult bone marrow were cultured with combinations of FBMSC, SCF, IL-3, IL-6, G-CSF and EPO, total nucleated cells, CFU-GM, BFU-E and CD34+ cells were increased by 119.6±30.9, 54.6±17.4, 25.2±4.4, 11.1±4.2 folds, respectively. Conclusion：FBMSC in cooperation with exogenous cytokines support the in vitro expansion of human hematopoietic progenitor cells efficiently.

Study on Relation of Early Immune Reconstitution with Acute Graft-Versus-Host Disease / 中国实验血液学杂志

To analyze the relation of early immune reconstitution with acute graft-versus-host disease after allogeneic hematopoietic stem cell transplantation (all-HSCT), the changes of CD3(+), CD4(+), CD8(+), CD25(+) and CD69(+) cells in peripheral blood from 26 patients with hematologic malignancies were assayed by flow cytometry within 2 months after allo-HSCT. All patients achieved hematopoietic reconstitution, and grade I and II - IV GVHD were developed in 9 and 5 patients, respectively. CD25(+) cells were increased in patients aGVHD at week 2 after transplantation and the peak value was appeared at week 3. The increase of CD25(+) cells was preceded the occurence of clinical signs of aGVHD. The maximal levels of CD25(+) cells increase correlated significantly with the severity of aGVHD. The increase of CD25(+) cells was declined along with remission of aGVHD signs. Our results suggest that analyzing immune reconstitution after allo-HSCT could predict occurence of aGVHD, and CD25(+) cell increase prior occurence of aGVHD is predictive marker for aGVHD.