Clinical efficacy of UBE-LIF versus posterior lesion removal bone graft fusion fixation in the treatment of lumbar brucelli spondylitis / 西安交通大学学报(医学版)

Objective To compare the safety and clinical efficacy of lesion removal combined with percutaneous pedicle screw fixation with classical posterior lesion removal in the treatment of lumbar brucelli spondylitis(LBS)by unilateral biportal endoscopic technique with transforaminal lumbar interbody fusion(UBE-LIF)technique.Methods The clinical data of 32 patients with LBS admitted by the Department of Spine and Orthopedics of Gansu Provincial Hospital of Traditional Chinese Medicine from January 2020 to January 2022 were retrospectively analyzed,and the clinical data of the 32 LBS patients were divided into 15 cases in the UBE-LIF group and 17 cases in the posterior group.The general data,surgery-related indexes,and postoperative pathological HE staining of the two groups were recorded and analyzed.The patients'clinical recovery was assessed according to their erythrocyte sedimentation rate(ESR)and C-reactive protein(CRP),low back pain visual analogue score(VAS),Japanese Orthopaedic Association(JOA)score,and Oswestry Dysfunction Index(ODI)preoperative,1 week after surgery,1,3,6 months and 1 year after surgery.Lumbar lordosis angle(LL)and intervertebral space height(DH)were measured by imaging before surgery and at the last follow-up,and intervertebral bone graft fusion was assessed using Suk grading criteria.Results Both groups successfully completed the operation and no serious postoperative complications occurred.There were no significant differences in gender,age,surgical segment,operation time,preoperative ESR and CRP,preoperative VAS,JOA score and ODI index,preoperative LL and DH(P＞0.05).The intraoperative blood loss,postoperative drainage,postoperative getting out of bed,and postoperative hospital stay in UBE-LIF group were significantly lower than those in the posterior group(P＜0.001).Pathological examination of diseased tissues was performed during surgery,all of which was consistent with brucellosis changes.Patients in both groups were followed up for 12-18 months,with an average of 14.8 months.The VAS,JOA score,and ODI index at all postoperative time points in the two groups were significantly improved compared with the preoperative period(P＜0.05).The difference between the two groups was significantly greater than that in the postoperative group:VAS score was lower in UBE-LIF group than in the posterior group(P＜0.01),CRP in both groups was higher than that in the preoperative group,and the elevation level was significantly lower in UBE-LIF group than in the posterior group(P＜0.001).There was no significant difference in ESR between the two groups compared with that before surgery(P＞0.05).There were no significant differences in VAS,JOA score,ODI index,CRP or ESR between the remaining time points after surgery(P＞0.05).At the last follow-up,imaging examination showed that the overall fusion rate of intervertebral bone graft in UBE-LIF group was 93.3％and 94.1％in the posterior group,without significant difference(x2=0.246,P=0.884).LL and DH were significantly improved in both groups compared with preoperative ones(P＜0.01),and the two groups did not significantly differ before and after surgery(P＞0.05).Conclusion Both surgical treatments for LBS are safe effect.Compared with posterior lesion removal bone graft fusion internal fixation,UBE-LIF technology combined with percutaneous pedicle screw internal fixation has the advantages of clear intraoperative vision,less blood loss,faster early postoperative recovery,and shorter postoperative hospital stay,and thus is a feasible surgical method for the minimally invasive treatment of LBS.

A preliminary analysis of individual neutron dose monitoring with 6LiF-7LiF and CR39 / 中国辐射卫生

Objective To preliminarily compare 6LiF-7LiF and CR39 in individual neutron dose monitoring, and to provide a reference for improving individual neutron dose monitoring. Methods According to the GBZ 128-2019, 26 radiation workers from 7 institutions received individual neutron dose monitoring with 6LiF-7LiF and CR39 at the same time. The monitoring results were analyzed. Results For most of the workers, the personal neutron dose equivalent Hp(10) was less than the minimum detectable level. The results with the two monitoring methods differed in 6 of 26 workers. Conclusion Both 6LiF-7LiF and CR39 monitoring methods can be used for individual neutron dose monitoring for radiation workers, but the difference between 6LiF-7LiF and CR39 (in threshold energy, energy response, etc.) should be considered so that different types of radiation workers receive appropriate individual neutron dose monitoring.

Quantitative estimation of enzymatic released specific oligosaccharides from Hericium erinaceus polysaccharides using CE-LIF / 药物分析学报

Polysaccharides exhibit multiple pharmacological activities which are closely related to their structural features.Therefore,quantitatively quality control of polysaccharides based on their chemical charac-teristics is important for their application in biomedical and functional food sciences.However,poly-saccharides are mixed macromolecular compounds that are difficult to isolate and lack standards,making them challenging to quantify directly.In this study,we proposed an improved saccharide mapping method based on the release of specific oligosaccharides for the assessment of Hericium eri-naceus polysaccharides from laboratory cultured and different regions of China.Briefly,a polysaccharide from H.erinaceus was digested by β-(1-3)-glucanase,and the released specific oligosaccharides were labeled with 8-aminopyrene-1,3,6-trisulfonic-acid(APTS)and separated by using micellar electrokinetic chromatography(MEKC)coupled with laser induced fluorescence(LIF),and quantitatively estimated.MEKC presented higher resolution compared to polysaccharide analysis using carbohydrate gel elec-trophoresis(PACE),and provided great peak capacity between oligosaccharides with polymerization degree of 2(DP2)and polymerization degree of 6(DP6)in a dextran ladder separation.The results of high performance size exclusion chromatography coupled with multi-angle laser light scattering and refractive index detector(HPSEC-MALLS-RI)showed that 12 h was sufficient for complete digestion of polysaccharides from H.erinaceus.Laminaritriose(DP3)was used as an internal standard for quantifi-cation of all the oligosaccharides.The calibration curve for DP3 showed a good linear regression(R2＞0.9988).The limit of detection(LOD)and limit of quantification(LOQ)values were 0.05 μg/mL and 0.2 μg/mL,respectively.The recovery for DP3 was 87.32(±0.03)％in the three independent injections.To sum up,this proposed method is helpful for improving the quality control of polysaccharides from H.erinaceus as well as other materials.

Curative effects of omeprazole combined with amoxicillin on chronic gastritis in 175 patients / 中国基层医药

Objective:To investigate the curative effects of omeprazole combined with amoxicillin on chronic gastritis and patients' quality of life.Methods:A total of 350 patients with chronic gastritis who received treatment in Jinan Seventh People's Hospital from May 2018 to August 2020 were included in this study. They were randomly divided into control and observation groups ( n = 175/group). The control group was treated with omeprazole, and the observation group was treated with omeprazole combined with amoxicillin. Curative effects, inflammatory factor levels, gastric motility, quality of life score, and the incidence of adverse reactions were compared between the two groups. Results:The response rate in the observation group was significantly higher than that in the control group [95.43% (167/175) vs. 86.86% (155/175), χ2 = 5.59, P = 0.018). Before treatment, there were no significant differences in C-reactive protein, interleukin-6, and tumor necrosis factor-α levels between the two groups (all P > 0.05). After treatment, C-reactive protein, interleukin-6, and tumor necrosis factor-α levels in the observation group were (47.97 ± 8.59) mg/L, (38.82 ± 6.29) μg/L, and (38.77 ± 5.92) μg/L, respectively, which were significantly lower than (51.34 ± 9.77) mg/L, (41.20 ± 7.53) μg/L, (41.09 ± 6.85) μg/L in the control group ( t = 3.42, 3.20, 3.39, all P < 0.05). Before treatment, there were no significant differences in serum gastrin-17 and motilin levels between the two groups (both P > 0.05). After treatment, serum gastrin-17 and motilin levels in the observation group were (380.49 ± 61.27) ng/L and (514.42 ± 68.73) ng/L, respectively, which were significantly higher than (362.25 ± 50.16) ng/L and (495.43 ± 61.36) ng/L in the control group ( t = 3.04, 2.72, both P < 0.05). After treatment, the quality of life score in the observation group was significantly higher than that in the control group ( P < 0.05). There was no significant difference in the incidence of adverse reactions between the two groups ( P > 0.05). Conclusion:Omeprazole combined with amoxicillin is highly effective on chronic gastritis. The combined therapy can reduce inflammatory responses, improve gastric motility, improve patients' quality of life, and is highly safe.

Role of LIF/LIFR/STAT3 pathway in endometrial receptivity in rats with polycystic ovary syndrome / 西安交通大学学报(医学版)

【Objective】 To investigate the role of LIF/LIFR/STAT3 pathway in endometrial receptivity in rats with polycystic ovary syndrome (PCOS). 【Methods】 Forty 21-day-old SD female rats were divided into normal (control) group, model group, sham-operation group, and LIF group with 10 rats in each. The rat model of PCOS was constructed by subcutaneous injection of prasterone sodium sulfate at the back of the neck. The serum levels of testosterone (T), glucose and insulin in each group were detected. The morphological changes of the uterus in each group were observed by HE staining, and the morphological changes of endometrium were measured. Immunohistochemistry, Western blotting, and Real-time fluorescence quantitative PCR(qRT-PCR) were used to determine the protein expression and mRNA expression of LIF and STAT3 in rat endometrium. 【Results】 Compared with control group, the levels of integrin avb3, serum T, insulin and glucose in PCOS rats were significantly increased (P=0.000, P=0.000, P=0.001). Supplementation of exogenous LIF could significantly reduce the levels of integrin avb3, serum T, glucose and insulin in PCOS rats (P=0.000, P=0.002, P=0.003, P=0.007). HE results showed that exogenous LIF could reduce uterine cavity and glandular morphology in PCOS rats and increase the equivalent diameter (P=0.000, P=0.000) and area (P=0.000, P=0.000) of uterine glands and glandular cavity, the ratio of glandular interstitial area (P=0.000), and the average endometrial thickness (P=0.006), with statistically significant differences. Immunohistochemistry, Western blotting, and qRT-PCR results showed that the expression levels of LIF and p-STAT3 protein and mRNA in model group were significantly decreased compared with control group. Compared with model group, the protein and mRNA expressions of LIF and p-STAT3 in LIF group were significantly increased (P<0.05). 【Conclusion】 Exogenous LIF supplementation can improve endometrial receptivity in PCOS rats, and its mechanism is related to the LIF/LIFR/STAT3 pathway.

Early effects of spinal endoscopic fusion technology in the treatment of degenerative lumbar disease / 西安交通大学学报(医学版)

【Objective】 To report the early clinical effects and surgical complications of endoscopic spinal fusion technology （Endo-LIF） in the treatment of degenerative lumbar disease. 【Methods】 The clinical data of 31 patients with degenerative lumbar spine disease treated with Endo-LIF from June 2019 to May 2021 were retrospectively analyzed. All the 31 patients underwent endoscopic spinal fusion therapy. We recorded the operation time， hospital stay duration， postoperative complications， visual analogue scale for pain （VAS）， oswestry dysfunction Index （ODI） and low back pain in the Chinese Orthopaedic Association Spine Group Surgery scoring standards before operation， immediately after operation， and the last follow-up to evaluate clinical efficacy. 【Results】 The operation time of the 31 patients was （134.80±34.98） min， the intraoperative blood loss was （100.13±18.49） mL， the hospital stay was （6.65±0.17） days， and the follow-up time was 6 to 18 （14±2.3） months. One patient had hematoma compression after surgery； he had incision made immediately to clear the hematoma and healed after bed rest. Two patients developed spinal hypertension and healed after bed rest. All the patients had no symptoms of nerve injury after operation， and the clinical symptoms were significantly relieved. We compared the perioperative VAS score and ODI index of all the patients， which were lower immediately after operation and at the last follow-up than those before the operation （P<0.05）， and the difference was statistically significant. 【Conclusion】 Endo-LIF technology has good short-term clinical effects and the advantages of milder trauma， less blood loss， and quick recovery after surgery. It is a safe and minimally invasive lumbar fusion surgery.

Alveolar bone pattern and salivary leptin levels among premenopausal obese women / Padrão ósseo alveolar e níveis salivares de leptina entre mulheres obesas na pré-menopausa

ABSTRACT Background: Systemic bone loss may lead to more severe periodontal destruction, decreasing local bone mineral density. Aim: A cross-sectional designed was performed to study associations among alveolar bone pattern, salivary leptin concentrations, and clinical periodontal status in premenopausal obese and eutrophic women. Methods: Thirty morbid obese (G1) and 30 normal-weight (G2) women were included. Anthropometric and periodontal measurements (probing depth - PD, clinical attachment levels - CAL, presence of calculus, bleeding on probing -BOP, and plaque accumulation) were assessed. OHIP-14 was used for assessment of oral health impact on quality of life. Panoramic radiography was used to obtain the panoramic mandibular index (PMI), mandibular cortical index (MCI), and mental index (MI). Intraoral periapical (PA) radiography was taken to measure the total trabecular bone volume. Leptin was measured in saliva of fasted overnight women. Results: Groups 1 and 2 differed in all anthropometric aspects, but height. Pocket depth, calculus, BOP, and plaque index were worse in G1. No differences between groups were found considering OHIP. Normal-weight subjects showed higher proportion of dense bone trabeculae than obese subjects for pre-molars, but not for molars. Mental and panoramic mandibular indexes did not differ and were in normal level. Leptin concentration was dependent only on BMI. Conclusion: Obesity affected the periodontal conditions, the alveolar bone pattern, and the salivary leptin concentration.

RESUMO Racional: A perda óssea sistêmica pode levar à destruição periodontal mais severa, diminuindo a densidade mineral óssea local. Objetivo: Investigar as associações entre padrão ósseo alveolar, concentrações de leptina salivar e estado periodontal em mulheres obesas na pré-menopausa e eutróficas. Métodos: Foram avaliadas 30 mulheres com obesidade mórbida (G1) e 30 com peso normal (G2). Foram analisadas as medidas antropométricas e periodontais (profundidade de sondagem - PS, nível clínico de inserção - NCI, presença de cálculo, sangramento à sondagem - SS e acúmulo de placa). O impacto da saúde bucal na qualidade de vida foi mensurado por meio do questionário OHIP-14. Radiografia panorâmica foi utilizada para obter o índice mandibular panorâmico (PMI), índice cortical mandibular (MCI) e índice mental (MI); já a radiografia periapical intraoral (AF) para medir o volume ósseo trabecular total. A leptina salivar foi coletada no período da manhã com a paciente em jejum. Resultados: Os grupos 1 e 2 diferiram em todos os aspectos antropométricos, exceto em estatura. Profundidade de bolsa, cálculo, SS e índice de placa foram piores no G1. Não foram encontradas diferenças entre os grupos considerando o OHIP. Indivíduos com peso normal apresentaram maior proporção de trabéculas ósseas densas do que os obesos para pré-molares, mas não para molares. Índices radiomorfométricos não diferiram entre os grupos e estavam dentro de valores normais. A concentração de leptina esteve associada ao IMC. Conclusão: A obesidade afetou as condições periodontais, o padrão ósseo alveolar e a concentração de leptina salivar.

El desafío de construir una Psicología del desarrollo crítica en sociedades inhóspitas / The Challenge of Constructing a Critical Developmental Psychology in Inhospitable Societies

Resumen La Psicología del desarrollo constituye un campo de conocimiento cuya existencia se da por descontada en el imaginario académico de la psicología salvadoreña. No obstante, existe una Psicología del desarrollo dominante que se ve reproducida en textos, clases y discursos, mientras que otra distinta, consecuente con la realidad histórica donde su estudio tiene lugar, aún es una tarea pendiente. Al considerar la descontextualización como uno de los presupuestos fundamentales de la Psicología del desarrollo dominante al uso, en este artículo de carácter teórico se reflexiona sobre esta desde la perspectiva del caso salvadoreño en tanto sociedad inhóspita: aquella que compromete el avance del ciclo vital de la mayoría de la población por, entre otras características, ser violenta y desigual. Son sometidas a escrutinio las conocidas categorías analíticas de la Psicología del desarrollo definidas como influencias normativas y no normativas para mostrar la relatividad y los sesgos de su aplicación usual. Se sostiene que, en el marco de una sociedad inhóspita, una Psicología del desarrollo debe considerar, al menos, procesos de adultización prematura en la niñez y la juventud, la improbabilidad de biografías estables, la vejez precaria así como las características típicas que muestran los miembros del contexto de interés. Se propone avanzar a una Psicología del desarrollo crítica: la necesidad de reacomodar su quehacer y reinventarse epistemológicamente para construir un conocimiento situado, propio y multidisciplinario que supere cegueras, provincianismos y reduccionismos académicos.

Abstract Developmental Psychology is a field of knowledge whose existence is taken for granted in the academic imagination of Salvadoran psychology. However, there is a mainstream Developmental Psychology that is reproduced in texts, lectures and discourses, while a different one, consistent with the historical reality where its study takes place, and is still a pending task. Considering de-contextualization as one of its fundamental assumptions, this theoretical article deals with the situation of Developmental Psychology from the perspective of the Salvadoran case as an Inhospitable Society: one that distorts the progress of most of its people´s life cycle, due to, among other features, its violence and social inequality. Very well known analytical categories such as normative and non-normative developmental trends are subjected to scrutiny to show the relativity and biases of their usual applications. It is argued that, in the context of an inhospitable society, Developmental Psychology should consider at least: Early Childhood and Youth Adultisation Processes, the improbability of stable biographies, Precarious Old Age and the typical features of individuals living in the context of interest. It aims to advance a Critical Developmental Psychology: the need to rearrange the work and to reinvent itself epistemologically in order to construct a situated, appropriated and multidisciplinary knowledge that overcomes blindness, provincialism and academic reductionism.

Association between metabolic syndrome and quality of life / Associação entre síndrome metabólica e qualidade de vida

AIMS: Despite all progress made in understanding and treating metabolic syndrome, the study of its impact on quality of life is still controversial and not well understood. The aim of this study was to test the hypothesis that metabolic syndrome can be associated with a worse quality of life. MESTHODS: A controlled cross-sectional study included individuals with metabolic syndrome, from the sub-analysis of a randomized clinical trial about lifestyle modification and cardiovascular risk factors, as well as individuals with no metabolic syndrome, attended as outpatients in several clinics at a general university hospital in Southern Brazil. Measurements were made in individual interviews and included data collection, laboratory tests, and application of general scales such as Mini-Mental State Examination and Medical Outcomes Study Short Form, General Health Survey (SF-36). Comparisons of quantitative data used the Student's t test, followed by analysis of covariance or multiple linear regression for adjustment, and correlation coefficient. For categorical data, the Chi-square or Fisher's exact test were used. RESULTS: The study included 229 individuals, 118 metabolic syndrome and 111 no metabolic syndrome. In univariate analysis, metabolic syndrome was significantly associated with lower scores in the social functioning (p<0.001) and role emotional (p=0.019) quality of life domains, and with the Mental Component Summary score of the SF-36 (p=0.013). However, after adjustments for confounding factors, especially body mass index, the significance of these associations was lost. The only significant association between metabolic syndrome and quality of life that has remained after the adjustments was with worse QOL in the role emotional domain, but only in men (p=0.049). CONCLUSIONS: After adjusting for multiple variables, metabolic syndrome was significantly associated with decreased quality of life scores in men in the role emotional domain.

OBJETIVOS: Apesar dos avanços no entendimento e tratamento da síndrome metabólica, o estudo do seu impacto sobre a qualidade de vida é ainda controverso e inconclusivo. O objetivo deste estudo foi testar a hipótese de que a síndrome metabólica estaria associada à piora da qualidade de vida. MÉTODOS: Um estudo transversal controlado incluiu indivíduos com síndrome metabólica, advindos da subanálise de um estudo controlado randomizado sobre modificação de estilo de vida e fatores de risco cardiovascular; e indivíduos sem síndrome metabólica, provenientes de diversos ambulatórios de um hospital geral no sul do Brasil. As medidas foram realizadas em entrevistas individuais, que incluíram coleta de dados demográficos, testes laboratoriais e aplicação do Exame do Estado Mental e o Medical Outcome Study Short Form, General Health Survey (SF-36). Para comparações entre dados quantitativos, foram utilizados teste t de Student, análise de covariância ou regressão linear múltipla para os ajustes dos fatores confundidores, e coeficiente de correlação. Para dados categóricos foi utilizado o qui quadrado ou o Exato de Fisher quando necessário. RESULTADOS: O estudo incluiu 229 indivíduos, sendo 118 com síndrome metabólica e 111 sem síndrome metabólica. A síndrome metabólica foi significativamente associada com baixos escores de qualidade de vida nos domínios funcionamento social (p<0,001) e aspectos emocionais (p=0,019); e com baixos escores no Componente Sumário da Saúde Mental do SF-36 (p=0,013). Entretanto, após ajustes para os fatores confundidores, especialmente índice de massa corporal, a significância dessas associações foi perdida. A única associação significativa que foi mantida entre síndrome metabólica e qualidade de vida após a análise ajustada foi com o domínio aspectos emocionais, embora somente em homens (p=0,049). CONCLUSÕES: Após o ajuste para múltiplas variáveis, a síndrome metabólica foi significativamente associada com diminuição da pontuação para qualidade de vida em homens, no domínio aspectos emocionais.

Hepatitis B monovalent vaccines produced by different manufacturers: comparative study on the quality of vaccine in period before and after the shelf life / Vacinas de Hepatite B monovalente produzidas por diferentes fabricantes: estudo comparativo da qualidade das vacinas no período pré e após o prazo de validade

For over 20 years, the hepatitis B (HB) vaccine has been produced by the expression of the viral gene encoding the hepatitis B surface antigen (HBsAg) in yeast. According to the data from WHO, the hepatitis B vaccines are generally stable for up to three years when stored at 2 ºC to 8 ºC. The purpose of this study was to evaluate whether the hepatitis B vaccine, at the time of their release, the quality criteria of this product were maintained seven years after the expiration date. Vaccine vials in multi-dose (10 and 05 doses) and three lots from each manufacturer (A, B and C) were analyzed. All batches were assayed for visual appearance, potency, bacterial endotoxin, thiomersal amount, aluminum hidroxyde contents and pH by means of validated tests. The nine lots evaluated seven years after the expiration date showed similar concentrations when compared to those demonstrated at the time of batches release by the National Institute for Quality Control in Health (INCQS). No significant change in the quality of the hepatitis B vaccine after the expiration date was confirmed. These data might be useful to subsidize a future evaluation for reviewing an extension of the vaccines shelf life.

As vacinas contra a hepatite B são produzidas pela expressão do gene viral codificado para o antígeno de superfície do vírus da hepatite B (HBsAg) em levedura, há mais de 20 anos. De acordo com os dados da OMS, a vacina de hepatite B tem até três anos de estabilidade quando armazenada entre 2 ºC e 8 ºC. O objetivo deste estudo foi de avaliar se, no momento da liberação, os critérios de qualidade da vacina de hepatite B foram mantidos após sete anos da data de validade. Foram analisados frascos de vacinas multi-dose (10 e 5 doses), sendo três lotes de cada produtor (A, B e C). Todos os lotes foram avaliados quanto às características de aparência visual, potência, endotoxina bacteriana, presença de timerosal, conteúdo de hidróxido de alumínio e pH por meio de testes validados. Os nove lotes avaliados sete anos após a data de expiração tiveram resultados similares quando comparados às concentrações na época de liberação dos lotes, realizada pelo Instituto Nacional de Controle de Qualidade em Saúde (INCQS). Os estudos confirmaram a manutenção da qualidade da vacina após o período de expiração. Estes dados podem subsidiar uma futura avaliação para extensão do prazo de validade das vacinas.

Secretory TAT-peptide-mediated protein transduction of LIF receptor α-chain distal cytoplasmic motifs into human myeloid HL-60 cells

The distal cytoplasmic motifs of leukemia inhibitory factor receptor α-chain (LIFRα-CT3) can independently induce intracellular myeloid differentiation in acute myeloid leukemia (AML) cells by gene transfection; however, there are significant limitations in the potential clinical use of these motifs due to liposome-derived genetic modifications. To produce a potentially therapeutic LIFRα-CT3 with cell-permeable activity, we constructed a eukaryotic expression pcDNA3.0-TAT-CT3-cMyc plasmid with a signal peptide (ss) inserted into the N-terminal that codes for an ss-TAT-CT3-cMyc fusion protein. The stable transfection of Chinese hamster ovary (CHO) cells via this vector and subsequent selection by Geneticin resulted in cell lines that express and secrete TAT-CT3-cMyc. The spent medium of pcDNA3.0-TAT-CT3-cMyc-transfected CHO cells could be purified using a cMyc-epitope-tag agarose affinity chromatography column and could be detected via SDS-PAGE, with antibodies against cMyc-tag. The direct administration of TAT-CT3-cMyc to HL-60 cell culture media caused the enrichment of CT3-cMyc in the cytoplasm and nucleus within 30 min and led to a significant reduction of viable cells (P < 0.05) 8 h after exposure. The advantages of using this mammalian expression system include the ease of generating TAT fusion proteins that are adequately transcripted and the potential for a sustained production of such proteins in vitro for future AML therapy.

The effect of adenovirus mediated LIF and OSM co-expressing on proliferation and differentiation of umbilical cord blood CD34+ hematopoietic stem/progenitor cell / 中华微生物学和免疫学杂志

Objective To establish Ad-LIF-OSM transgenic feeder cells for the expansion of CD34+ hematopoietic stem/progenitor cell and tentatively study its effect in expansion and differentiation of cord blood hematopoietic stem cell(HSC) in vitro.Methods In the foundation of pAdTrack-CMV-LIF-polyA+promoterΔ,the OSM gene was inserted to the vector plasmid.Then we structure the transfer plasmid pAdTrack-CMV-LIF-polyA+promoterΔ-OSM.The transfer vector and backbone vector were further cotransfected for homologous recombination. The result pAdEasy-1-pAdTrack-CMV-LIF-polyA + promoterΔ-OSM homologous recombination plasmid were transfected into the human embryonic kidney 293 (QBI-293A) cells,leading to formation of the recombinant adenviruses Ad-LIF-OSM which co-expressing LIF and OSM.Infect the feeder layer cells with groups of Adenovirus,detection the expressing of LIF and OSM in WI-38 cells by RT-PCR and ELISA.Compares the stem cells differentiation and proliferation of the different experimental groups in vitro by transwell and cell counting.Results The sequencing results show that the OSM genes were anastomotic in Ad-LIF-OSM.LIF and OSM gene could be detected in feeder layer cells which infected by Ad-LIF-OSM.Exogenetic LIF and OSM have special effect in culturing HSC in vitro.Conclusion The adenoviral vector co-expressing LIF and OSM (Ad-LIF-OSM) were successfully constructed.Ad-LIF-OSM transgenic feeder cells can effectively proliferate umbilical cord blood CD34+ HSPC in vitro and delay it differentiate.

Construction and fluorescence intensity of lipid ultrasound microbubbles with monoclonal antibody targeted to leukaemia inhibitory factor receptor / 中华超声影像学杂志

Objective To investigate fluorescence intensity of lipid ultrasound microbubbles constructed in vitro and targeted to leukaemia inhibitory factor receptor (LIFR) with a monoclonal antibody.MethodsThe LIFR-targeted ultrasound mierobubbles (MB-BSB-LIFR-AB) were constructed using a technology of biotin-avidin bridge.FITC labeled Avidin was incubated with lipid ultrasound microbubbles (MB) and biotinylated lipid microbubbles (MB-B).Two dilutions (1:4 and 1:16) of DTAF second antibody were incubated with four types of ultrasound microbubbles,including MB,MB-B,biotinavidin-MB (MB-BS),MB-BSB-LIFR-AB.The fluorescence intensity of microhubbles were graded as 0,1,2to 3.ResultsAfter incubating with FITC-avidin,MB-B displayed bright green fluorescence ( grade 3),but MB had no fluorescence ( grade 0).After incubating with two dilutions of DTAF second antibody (1:4 and 1:16),MB-BSB-LIFR-AB displayed brightest green fluorescence (grade 3) in both concentration,while MB-BS and MB-B only displayed dim green fluorescence (grade 1 ) at the dilution of 1:4,with MB displaying no fluorescence at either dilution (grade 0).Conclusions LIFR monoclonal antibody can be effectively conjugated to MB-B with biotin-avidin bridge.Fluorescence detection is a simple method for investigating the conjugation reliability of targeted lipid ultrasound microbubbles.

Effects of Catgut Embedding at "Shimen" (CV 5) on the Endometrial Receptivity during the Periimplantation Period in Mice / 针刺研究

Objective To observe the effect of catgut embedding(CE) at "Shimen"(CV 5) on the endometrial receptivity,pinopodes expression of the endometrial surface and leukaemia inhibitory factor(LIF) immunoactivity during periimplantation period.Methods Thirty Kunming mice were randomly divided into control,CE of "Shimen"(CV 5,CE-CV 5) and medication groups(n=10/group).For mice of CE-CV 5 group,a piece of catgut was embedded into the subcutaneous tissue of "Shimen"(CV 5) on the day when the vagina-discharged epistom was found(pregnancy day 1,Pd 1).On Pd 4,mifepristone(0.1 mL,diluted in propylene glycol) was subcutaneously injected into CV 5 in rats of medication group.The expression of endometrial pinopodes(sampled on Pd 5) was observed by scanning electron microscopy.The immunoactivity of LIF of the endometrium was detected by immunohistochemistry.Results Compared with control group,the mean optical density(OD) values of LIF in CE-CV 5 and medication groups decreased significantly(P0.05).Electronic microscopic observation showed 1) abundant mature pinopodes on the endometrial surface,with a large number of well-stacked ecphyma in control group;2) fewer pinopodes and well-arranged smooth epithelial cells on the endometrial surface in catgut embedding group;and 3) no pinopodes found in the endometrium of medication group.Conclusion Catgut embedding at "Shimen"(CV 5) can suppress the establishment of the mouse endometrial receptivity,which is possibly related to its effect in inhibiting the expression of endometrial pinopodes and LIF.

Protective effect of GSH on lung injury in rats with severe acute pancreatitis / 中华内分泌外科杂志

Objective To investigate the protective effect of GSH on lung injury in rats with severe acute pancreatitis(SAP) and investigate the mechanism of severe acute pancreatitis associated lung injury. Methods Fifty-four Spragwe Dawley rats were randomly divided into three groups: control group, model(SAP)group and herbal group. Rats in model group and herbal group were induced pancreatitis by retrograde injection of 5% sodium taurocholate into the pancreatobiliary duct. Animals were killed at 3h, 6h, 12h after injection. The serum amylase was examined at 3h, 6h, 12h after injection. Pulmonary tissue fluid content was measured.The expression of pulmonary TNF-α mRNA and LIF mRNA was detected by semi-quantitative reverse transcription polymerase chain reaction (RT-PCR). Results The serum level of amylase was lowered significantly in herbal group in comparision with that in model group (P<0.05) and pulmonary tissue fluid content in herbal group was reduced compared with model group (P<0.05). Similarly, the level of pulmonary TNF-α mRNA and LIF mRNA expressions was both significantly reduced in herbal group compared with model group (P<0.05). LIF mRNA was not examined in normal control group. Conclusion Treatment with GSH can prevent lung injury of rats with SAP.

Evaluation the Output Dose of Linear Accelerator Photon Beams by Blind Test with Dose Characteristics of LiF:Mg,Cu,P TLD / 의학물리

To achieve the accurate evaluation of given absorbed dose from output dose of linear accelerator photon beam through investigate the characteristics of LiF:Mg,Cu,P TLD powder. This experimental TL phosphor is performed with a commercial LiF:Mg,Cu,P powder (Supplied by PTW) and TL reader (LTM, France). The TLD was exposed to 6 MV X rays of linear accelerator photon beam with range 15 to 800 cGy in blind dose at two hospitals. The dose evaluation of TLD was through the experimental algorithms which were dose dependency, dose rate dependency, fading and powder weight dependency. The glow curve has shown the three peaks which are 110, 183 and 232 degrees of heating temperature and the main dosimetric peak showed highest TL response at 232 high temperature. In this experiments, the LiF:Mg,Cu,P phosphor has shown the 2.5 eV of electron trap energy with a second order. This experiments guided the dose evaluation accuracy is within 1% +2.58% of discrepancy. The TLD powder of LiF:Mg,Cu,P was analyzed to dosimetric characterists of electron captured energy and order by glow shape, and dose-TL response curve guided the accuracy within 1.0+2.58% of output dose discrepancy.

The Factors Affecting the Success and Quality of Life after a Tension-free Vaginal Tape Procedure in Patients with Stress Urinary Incontinence / 대한비뇨기과학회지

PURPOSE: The factors affecting the success and quality of life following a tension-free vaginal tape(TVT) procedure were investigated in patients with stress urinary incontinence. MATERIALS AND METHODS: We included 79 women with stress urinary incontinence that underwent the TVT procedure and were followed for at least 3 years. Preoperatively, the patients were evaluated by history, physical examination, a 1-hour pad test, and videourodynamics to determine the abdominal leak point pressure(ALPP). In addition, pre- and postoperative quality of life was evaluated by the incontinence quality of life questionnaire(I-QoL). We analyzed factors including patient characteristics, history, 1-hour pad test and ALPP with respect to the success and quality of life after the TVT. A success after the TVT was defined as the absence of any subjective complaint of leakage. RESULTS: The overall 3-year success rate of the TVT was 90%. There was a statistically significant increase in the I-QoL scores postoperatively. There were no significant preoperative factors affecting the success rate and the postoperative I-QoL scores. However, when the postoperative I-QoL scores were compared with the preoperative scores, the increase in the I-QoL scores was significantly higher in the patients with urge incontinence, low ALPP and high-grade incontinence. CONCLUSIONS: The results of this study suggest that the TVT procedure is effective for treating female stress incontinence and improving the quality of life without any independent risk factors. However, for improving the quality of life, the TVT was more effective in women with stress urinary incontinence with urge incontinence, low ALPP and high-grade symptoms.

Effect of LIF gene modified ECV-304 cells on the ex vivo culture of HSC/HPC in cord blood / 临床检验杂志

Objective To study the effect of the ECV-304 cells modified with LIF gene on the ex vivo culture of HSC/HPC in cord blood.Methods The ECV-304 cells were infected by Eukaryotic Expression plasmid pcDNA3.0LIF,and the positive ECV-304 cells were obtained by selected with G418.These cells were used to co-culture with CD34+ cells of cord blood.The phenotype of CD34+ and CD34+ CD54+、CD34+ CD62L+ primitive progenitors was detected by flow cytometry.Results The LIF gene can express in ECV-304 cells steadily.ECV-304 cells modified with LIF gene can improve expansion of CB CD34+、CD34+CD54+ and CD34+ CD62L+ cells while sustaining the expression of homing-related adhesion molecule.Conclusion The ECV-304 cells modified with LIF gene can not only significantly expand CB hematopoietic progenitor cells ex vivo,but the expanded CD34+ cells may well retain their homing ability.

A LIF Mutation at The 29th Amino Acid Totally Abolished The Biological Functions / 生物化学与生物物理进展

Leukemia inhibitory factor (LIF) plays important roles in varieties of biological processes. This factor is highly conserved in mammalian animals and only one heterozygous LIF mutation was reported to cause the infertility of women. A LIF mutation was generated and the evidences were provided that the mutation of mature LIF at the 29th amino acid totally abolished its functions, including stimulation of STAT activation assayed by Luciferase reporter gene expression and EMSA experiments. In addition, the mutated LIF failed to inhibit the proliferation of M1 cells. The data indicated that the mutation of LIF did not have a dominant negative effect but lost the biological functions, suggesting that the 29th amino acid is critical for maintaining the activities of LIF.

Expression of leukemia inhibitory factor in osteoarthritic tissues in rabbits and human:an experimental and clinical study / 中华创伤骨科杂志

Objective To investigate the regulation expression of leukemia inhibitory factor(LIF)in hu- man and animal osteoarthritic(OA)tissues and its clinical relevance.Methods 1)Thirty-five Japanese rabbits, aged eight months,were used to make models of experimental osteoarthritis.Operations were performed at the right knee and the sham ones at the left knee in each rabbit.Rabbits were sacrificed on the 3,7,14,28,42,56 and 84 days after operation respectively.Cartilage and synovium of the knee were collected to observe histological changes of osteoarthritis at different times;immunohistochemistry analysis was conducted to observe the LIF expression and distribution in the cartilage and synovium of the animals.2)From April 2003 to October 2003,32 samples of human articular tissues(cartilage,subchondral bone and synovium)were obtained in the operational procedures and a good quantity of RNA was isolated using Magnetic Beads.The patients who underwent articular operations donated the samples.In the reverse transcription-polymerase chain reaction(RT-PCR),the mRNA expression of LIF was mea- sured by semi-quantity analysis and the location of LIF protein was determined by enzyme-linked immunosorbent assay (ELISA).Results A slight expression of LIF was seen in normal cartilage but less in synovium.However,the expression of LIF was remarkable in synovial lining cells,superficial and middle layers of cartilage in animal os- teoarthritis.There was a significant difference in expression between the animal osteoarthritis and the control group (P＜0.05 ).In human tissue study,LIF mRNA was expressed to a very low level in normal articular tissues and there was no significant difference(P＞0.05)between different anatomical locations.In moderate degrading sub- chondral bone,LIF mRNA was expressed to its highest level.LIF was expressed to the highest level in seriously degrading cartilage tissues.The results were similar to ELISA testing results.LIF extents varied in different articular tissue sections.Conclusions LIF is an important mediator that can contribute to tbe pathogenesis of OA.The different temporal and spatial distributions of LIF in normal and OA tissues imply that LIF may play some important roles in pathogenesis of OA.