Conhecimento de graduandos sobre doação de medula óssea / Knowledge of undergraduates about bone marrow donation

Caracterizar o conhecimento dos graduandos de uma instituição de ensino superior acerca do processo de doação de medula óssea. Método: Trata-se de um estudo descritivo com abordagem quantitativa. Foram entrevistados 266 graduandos, de ambos os sexos, entre 17 e 21 anos de idade. Foi utilizado um questionário estruturado, contendo perguntas sobre o conhecimento a respeito do processo de doação de medula óssea. Resultados: A maioria dos participantes não conhece o processo de cadastro e doação de medula óssea, tendo como a falta de informação a principal causa para a desinformação a respeito do tema abordado, consequentemente resultando em pouca demanda para que mais pessoas sejam cadastradas no REDOME. Conclusão: os estudantes do ensino superior desconhecem os processos que envolvem desde ao cadastro até a doação de medula óssea, devido à desinformação e pouca divulgação sobre a temática. (AU)

To characterize the knowledge of undergraduates from a higher education institution about the bone marrow donation process. Method: This is a descriptive study with a quantitative approach. 266 undergraduates were interviewed, of both sexes, between 17 and 21 years old. A structured questionnaire was used, containing questions about their knowledge about the bone marrow donation process. Results: Most participants do not know the bone marrow registration and donation process, with lack of information being the main cause for misinformation about the topic addressed, consequently resulting in little demand for more people to be registered in REDOME. Conclusion: the higher education students are unaware of the processes that involve from registration to bone marrow donation, due to misinformation and little dissemination on the subject. (AU)

Caracterizar el conocimiento de estudiantes de grado de una institución de educación superior sobre el proceso de donación de médula ósea. Método: Se trata de un estudio descriptivo con abordaje cuantitativo. Se entrevistaron 266 estudiantes universitarios, de ambos sexos, entre 17 y 21 años. Se utilizó un cuestionario estructurado que contenía preguntas sobre el conocimiento sobre el proceso de donación de médula ósea. Resultados: La mayoría de los participantes desconocen el proceso de registro y donación de médula ósea, siendo la falta de información la principal causa de la desinformación sobre el tema abordado, por lo que se genera poca demanda para que más personas se registren en REDOME. Conclusión: los estudiantes de educación superior desconocen los procesos que involucran desde el registro hasta la donación de médula ósea, debido a la desinformación y poca difusión sobre el tema. (AU)

Resveratrol Alleviates Osteoporosis by Promoting Osteogenic Differentiation of Bone Marrow Mesenchymal Stem Cells via SITR1/PI3K/AKT Pathway / El Resveratrol Alivia la Osteoporosis al Promover la Diferenciación Osteogénica de las Células Madre Mesenquimales de la Médula Ósea a Través de la Vía SITR1/PI3K/AKT

SUMMARY: Senile osteoporosis is mainly caused by reduced osteoblast differentiation and has become the leading cause of fractures in the elderly worldwide. Natural organics are emerging as a potential option for the prevention and treatment of osteoporosis. This study was designed to study the effect of resveratrol on osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) in osteoporosis mice. A mouse model of osteoporosis was established by subcutaneous injection of dexamethasone and treated with resveratrol administered by gavage. In vivo and in vitro, we used western blot to detect protein expression, and evaluated osteogenic differentiation of BMSCs by detecting the expression of osteogenic differentiation related proteins, calcium deposition, ALP activity and osteocalcin content. Resveratrol treatment significantly increased the body weight of mice, the level of serum Ca2+, 25(OH)D and osteocalcin, ration of bone weight, bone volume/total volume, trabecular thickness, trabecular number, trabecular spacing and cortical thickness in osteoporosis mice. In BMSCs of osteoporosis mice, resveratrol treatment significantly increased the expression of Runx2, osterix (OSX) and osteocalcin (OCN) protein, the level of calcium deposition, ALP activity and osteocalcin content. In addition, resveratrol treatment also significantly increased the expression of SIRT1, p-PI3K / PI3K and p-AKT / AKT in BMSCs of osteoporosis mice. In vitro, resveratrol increased the expression of SIRT1, p-PI3K / PI3K and p-AKT / AKT, Runx2, OSX and OCN protein, the level of calcium deposition, ALP activity and osteocalcin content in BMSCs in a concentration-dependent manner, while SIRT1 knockdown significantly reversed the effect of resveratrol. Resveratrol can attenuate osteoporosis by promoting osteogenic differentiation of bone marrow mesenchymal stem cells, and the mechanism may be related to the regulation of SIRT1/PI3K/AKT pathway.

La osteoporosis senil es causada principalmente por una diferenciación reducida de osteoblastos y se ha convertido en la principal causa de fracturas en las personas mayores en todo el mundo. Los productos orgánicos naturales están surgiendo como una opción potencial para la prevención y el tratamiento de la osteoporosis. Este estudio fue diseñado para estudiar el efecto del resveratrol en la diferenciación osteogénica de las células madre mesenquimales de la médula ósea (BMSC) en ratones con osteoporosis. Se estableció un modelo de osteoporosis en ratones mediante inyección subcutánea de dexametasona y se trató con resveratrol administrado por sonda. In vivo e in vitro, utilizamos Western blot para detectar la expresión de proteínas y evaluamos la diferenciación osteogénica de BMSC detectando la expresión de proteínas relacionadas con la diferenciación osteogénica, la deposición de calcio, la actividad de ALP y el contenido de osteocalcina. El tratamiento con resveratrol aumentó significativamente el peso corporal de los ratones, el nivel sérico de Ca2+, 25(OH)D y osteocalcina, la proporción de peso óseo, el volumen óseo/ volumen total, el espesor trabecular, el número trabecular, el espaciado trabecular y el espesor cortical en ratones con osteoporosis. En BMSC de ratones con osteoporosis, el tratamiento con resveratrol aumentó significativamente la expresión de las proteínas Runx2, osterix (OSX) y osteocalcina (OCN), el nivel de deposición de calcio, la actividad de ALP y el contenido de osteocalcina. Además, el tratamiento con resveratrol también aumentó significativamente la expresión de SIRT1, p-PI3K/PI3K y p-AKT/AKT en BMSC de ratones con osteoporosis. In vitro, el resveratrol aumentó la expresión de las proteínas SIRT1, p-PI3K/PI3K y p- AKT/AKT, Runx2, OSX y OCN, el nivel de deposición de calcio, la actividad de ALP y el contenido de osteocalcina en BMSC de manera dependiente de la concentración, mientras que La caída de SIRT1 revirtió significativamente el efecto del resveratrol. El resveratrol puede atenuar la osteoporosis al promover la diferenciación osteogénica de las células madre mesenquimales de la médula ósea, y el mecanismo puede estar relacionado con la regulación de la vía SIRT1/PI3K/AKT.

Research progress on the effect of fluoride on bone marrow mesenchymal stem cells / 中华地方病学杂志

Fluorine is an important element widely present in nature, and moderate intake can prevent dental caries and promote bone development. However, long-term excessive intake can lead to fluorosis, damaging tissues or organs such as teeth, bones, heart muscle, and blood vessels. Bone marrow mesenchymal stem cells (BMSCs) play an important role in the repair process of bone injury due to their excellent multi-directional differentiation potential. Therefore, studying BMSCs is of great value in the treatment of fluorosis caused by fluoride poisoning. This article summarize the progress on the effect of fluoride on BMSCs, providing new ideas for the study of the pathogenesis and clinical treatment of fluorosis.

Molecular mechanism of sulforaphane promoting the differentiation of bone marrow stem cells into osteoblasts / 局解手术学杂志

Objective To investigate the molecular mechanism of sulforaphane(Sul)promoting bone marrow stem cells(BMSCs)differentiating into osteoblasts.Methods BMSCs were divided into the control group(without any treatment),induction group(induction of osteogenic differentiation),and induction+Sul group(induction of osteogenic differentiation with the addition of 40 μmol/L of Sul).The adenovirus-shRNA-Mock,-shRNA-TET1,-shRNA-TET2,and-shRNA-TET3 were transfected into BMSCs as the shRNA-Mock group,shRNA-TET1 group,shRNA-TET2 group,and shRNA-TET3 group.BMSCs were cultured in cell culture medium containing osteogenic differentiation induction medium and 40 μmol/L of Sul,and then transfected with adenovirus-shRNA-TET1,-shRNA-TET2,-shRNA-TET3,and-shRNA-Mock as the induction+Sul+shRNA-TET1 group,induction+Sul+shRNA-TET2 group,induction+Sul+shRNA-TET3 group,and induction +Sul+shRNA-Mock group.The mRNA and protein expression levels of Runx2 after BMSCs differentiated into osteoblasts were determined by qPCR and Western blot.The DNA content of Runx2 promoter region bound to Histone H3 after BMSCs differentiated into osteoblasts was determined by chromatin immunocoprecipitation(ChIP).The methylation level of Runx2 promoter region of BMSCs differentiated into osteoblasts was determined by HpaⅡenzyme and MspⅠenzyme digestion combined with qPCR.The degree of BMSCs differentiated into osteoblasts was determined by alizarin red staining.Results Compared with the induction group,the mRNA and protein expression levels of Runx2 in the induction+Sul group were significantly increased(P<0.05);the content of DNA in the Runx2 promoter region bound to Histone H3 was increased(P<0.05),the methylation level of Runx2 promoter region was reduced(P<0.05),and the alizarin red staining score was elevated(P<0.05).Compared with the induction+Sul group,the content of DNA in the Runx2 promoter region bound to Histone H3 in the induction+Sul+shRNA-TET1 group was decreased(P<0.05),the methylation level of Runx2 promoter region was increased(P<0.05),and the alizarin red staining score was decreased(P<0.05).While there was no significant change among the induction+Sul+shRNA-TET2 group,induction+Sul+shRNA-TET3 group,induction+Sul+shRNA-Mock group(P>0.05).Conclusion Sul can promote the differentiation of BMSCs into osteoblasts through promoting DNA demethylation of Runx2 promoter region by TET1.

Correlation study of age,gender and lumbar vertebral marrow fat in adults based on MRI iterative decomposition of water and fat with echo asymmetry and least-squares estimation image quantitation imaging technique / 中国脊柱脊髓杂志

Objectives:To investigate the relationships between vertebral marrow fat in lumbar spine and age and gender in adults using iterative decomposition of water and fat with echo asymmetry and least-squares estimation image quantitation(IDE AL-IQ)magnetic resonance imaging technology.Methods:The IDEAL-IQ fat fraction images from 298 subjects(Male:138,Female:160,age range:20-69 years old)were collected.All the patients were divided into 5 groups based on age,with each group spanning a range of 10 years:age range 20-29 years(Twenties):24 males,20 females;30-39 years(Thirties):47 males,39 females;40-49 years(Forties):36 males,47 females;50-59 years(Fifties):20 males,37 females;60～69 years(Sixties):11 males,17 females.The bone marrow proton density fat fration(PDFF)were measured using GE ADW4.6 processing work station.Results:In the same age group,there were differences in vertebral bone marrow PDFF between gen-ders.PDFF of L1-L5 vertebrae was significantly higher in males than females in twenties,thirties and forties(P＜0.05).In the fifties,there was no statistically significant difference in the L1-L5 vertebrae PDFF between males and females(P＞0.05);while in the sixties,the PDFF of the L1-L5 vertebrae was lower in males than that in females(P＜0.05).The PDFF of lumbar vertebral bone marrow was positively correlated with age,with a higher correlation observed in females(r=0.72,P＜0.05)than that in males(r=0.32,P＜0.05).From the age of 20 to 69,the L4 vertebra PDFF in males had the highest growth rate(21.08％),while the L1 vertebra PDFF in female had the highest growth rate(65.68％).For males,the growth of PDFF was primarily concentrated in the thirties and fifties;The PDFF of L1,L4,and L5 vertebrae showed the largest increase in the fifties,while that of L2 and L3 vertebrae had the highest increase rate in the thirties.For females,vertebral PDFF showed a slight decrease trend in the group of thirties,which gradually increased subsequently in all vertebare in the group of forties,fifties,and sixties,with the largest increase rate observed in the fifties.Conclusions:There are differences in vertebral fat distribution between males and females across different age groups,and the growth rates of vertebral PDFF also vary;the PDFF of vertebral bodies in different segments of the lumbar spine is positively correlated with age.

Auto-segmentation of target areas and organs-at-risk for total marrow and lymphoid irradiation in children / 中国医学物理学杂志

Objective To investigate the feasibility of AccuLearning system for the auto-segmentation of target areas and organs-at-risk(OAR)for total marrow and lymphoid irradiation(TMLI)in children.Methods Thirty pediatric patients who underwent TMLI since 2018 to 2022 were selected.The patients were immobilized in the supine position,and their CT images were acquired on the Philips Brilliance Big Bore CT scanner.After the target areas and OAR were manually delineated and modified,the CT images and manually delineated contours were imported into AccuLearning system for training,validation,and testing of the auto-segmentation model.The auto-segmentation results in 6 TMLI patients in the test set were evaluated in terms of Dice similarity coefficient(DSC),95%Hausdorff distance and average surface distance.Results On the test set with 6 cases,except for the lens that was difficult to be delineated automatically,the DSC values was above 0.70 for all other target areas and OAR,with only one patient having a DSC value of 0.59 for the stomach.The average DSC value for the stomach in all 6 patients was 0.76,and the average DSC values for the other organs were above 0.80.Conclusion The target areas and OAR automatically delineated with the model can meet the requirements of clinical planning after simple modifications.

Diagnostic value of MRI using proton density-weighted fat-saturated sequence for bone marrow edema in osteoarticular injury / 中国医学物理学杂志

Objective To analyze the value of magnetic resonance proton density-weighted fat-saturated(PDWI-FS)sequence in the diagnosis of bone marrow edema(BME)in osteoarticular injury.Methods A total of 150 patients with bone and joint trauma were enrolled in the study.All patients underwent sagittal PDWI-FS sequence scan and conventional MRI sequence scan.The BME detection,signal intensity,image quality,and the signal-to-noise ratio and contrast-to-noise ratio of the lesions were compared between two methods.Results Both methods revealed that there were 225 sites of BME signs in 134 out of the 150 patients,with a higher prevalence in knee joint trauma patients.The signal intensity of the lesions was mainly grade 3 on PDWI-FS sequence and grade 2 on conventional MRI sequence,accounting for 97.78%(220/225)and 43.11%(97/225),indicating that the two methods graded signal intensity differently(Z=15.919,P<0.05).PDWI-FS sequence and conventional sequence had scores of 4.09±0.45 vs 3.88±0.39,3.65±0.42 vs 3.41±0.36,3.25±0.37 vs 3.14±0.35 and 4.21±0.38 vs 3.97±0.34 on lesion clarity,spatial resolution,anamorphosis and diagnostic confidence,and the former scored higher(t=4.319,5.314,2.645,5.765;P<0.05).The signal-to-noise ratio and contrast-to-noise ratio of the lesions on PDWI-FS sequence were 2.07±0.23 and 5.52±0.64,higher than 2.01±0.22 and 5.17±0.59 on conventional sequence,and the differences were statistically significant(t=2.309,4.925;P<0.05).Conclusion Compared with conventional MRI sequence,magnetic resonance PDWI-FS sequence can effectively enhance image quality and display lesions more clearly,providing more accurate information for the diagnosis of BME in osteoarticular injury.

Treatment of blastocytic plasmacytoid dendritic cell tumor with bone marrow involvement and no skin lesions: a case report / 中国综合临床

Plasm Blastic Plasmacytoid Dendritic Cell Neoplasm (BPDCN) is a rare and highly invasive hematological malignancies. Typical BPDCN usually starts with skin lesions, involves lymph nodes, bone marrow, central nervous system and other soft tissues. It is not sensitive to chemotherapy and radiotherapy, and the prognosis is very poor. A patient with abdominal pain, anemia, hepatosplenomegalosis as the first manifestations, and lack of typical skin lesions was admitted in Bayannur Hospital on August 28, 2020. BPDCN was finally diagnosed by bone marrow morphology, flow cytometry and bone marrow biopsy. Provide reference for clinical doctors to indentify and treat BPDCN by analyzing the clinical data of rare BPDCN cases with no skin lesions.

Study on the correlation between bone marrow adipocytokines and myelodysplastic syndromes / 中国肿瘤临床

Objective:To explore the relationship between adipocytokine levels in bone marrow and the onset,progression,and prognosis of myelodysplastic syndromes(MDS).Methods:Retrospective analysis of adipocytokine levels in the bone marrow of 72 patients with MDS and 16 patients with MDS-related secondary acute myeloid leukemia(sAML),including adiponectin(ADP),leptin(LEP),visfatin/nicotinamide phosphoribosyltransferase(NAMPT),adipsin/complement factor D(CFD),and C1q/TNF-related protein 1(CTRP1),detected by enzyme-linked immunosorbent assay(ELISA)at The Affiliated Cancer Hospital of Zhengzhou University from February 2020 to February 2022.High-throughput sequencing was used to detect MDS-related genes in 70 patients and the relationship between adipocytokines and the clinical characteristics,disease subtypes,mutant genes,and prognosis of patients were analyzed.Seventy-eight MDS-related genes were identified.Results:Clinical characteristics showed that ADP(P=0.027)and LEP(P=0.019)levels were significantly lower in men than inwomen;ADP(P=0.020),CFD(P<0.001),and NAMPT(P=0.021)levels were significantly lower in patients aged<65 years than in patients aged≥65,where-as LEP levels were significantly higher(P=0.043).Adiponectin levels were significantly higher in patients with BMI<24 than in patients with BMI≥24(P=0.025),whereas LEP levels were significantly lower(P=0.020);NAMPT levels were significantly higher in the group with in-creased blasts than in the group with no blasts(P=0.037).The CTRP1 levels were significantly higher in the MDS group than in the sAML group(P=0.010).Abnormal gene correlation analysis showed that elevated CTRP1 levels were positively correlated with the occurrence of epigenetically related abnormal genes(P=0.001)and were positively correlated with the occurrence of TET2 and U2AF1(P<0.001 and P=0.036,respectively);ADP and CFD levels were positively correlated with the occurrence of NPM1(P=0.048 and P=0.026,respectively).Multifactorial Cox proportional hazards regression model analysis showed that LEP<0.2 ng/mL was an independent risk factor for progres-sion-free survival(PFS)and overall survival in patients with MDS(P=0.002 and P<0.001,respectively),whereas NAMPT<2.1 ng/mL was a protective factor for PFS in patients with MDS(P=0.043).Conclusions:Adipocytokines in the bone marrow microenvironment are closely as-sociated with the clinical characteristics,gene mutations,and prognosis of patients with MDS,with LEP<0.2 ng/mL being an independent prognostic risk factor and NAMPT<2.1 ng/mL being a prognostic protective factor.

Assessment of the effect of time-restricted feeding on bone marrow fat in high-fat diet-induced obese rats based on MRI proton density fat fraction / 中华放射学杂志

Objective:To investigate the effect of time-restricted feeding (TRF) on bone marrow fat of proximal femur in obese rats induced by high-fat diet (HFD) using proton density fat fraction (PDFF).Methods:Totally 30 male Sprague-Dawley rats were stratified and randomly sampled into 6 subgroups according to body weight, with 5 rats each. Then 2 subgroups were combined into one group, and there were totally 3 groups. The rats in the control group were fed with normal diet, and the rats could eat as much as they wanted for 24 h; the rats in the HFD group were fed with high-fat diet, and the rats could eat as much as they wanted for 24 h; the rats in the HFD+TRF group were fed with high-fat diet only between 9 AM (2 h after light) and 17 PM. One subgroup of rats from each group was examined with MRI on the femur on day 28 of the experiment, and the other subgroup from each group was examined on day 56 to measure the bone marrow PDFF of proximal femur based on mDixon-Quant quantitative sequence images. The rats were executed at the end of the scanning period, and blood samples were collected to measure serum levels of leptin. One-way ANOVA or Kruskal-Wallis H test was used to compare the differences in body weight, PDFF, and serum levels of leptin among 3 groups. The LSD- t test was used for multiple comparisons. Results:On day 28 of the experiment, the differences in body weight, PDFF, and serum leptin among the 3 groups of rats were not statistically significant ( P>0.05). On day 56, the bone marrow PDFF of proximal femur of the rats in the control group, HFD group, and HFD+TRF group were (7.2±1.4)%, (9.7±2.4)%, and (11.2±3.6)%, respectively. The differences in body weight, PDFF, and serum levels of leptin among the 3 groups of rats were statistically significant ( F=6.95, P=0.010, F=5.98, P=0.007, F=4.54, P=0.034). The results of multiple comparisons showed that the body weight in the HFD group was higher than those in the control group (LSD- t=52.96, P=0.036) and the HFD+TRF group (LSD- t=82.74, P=0.003). The values of bone marrow PDFF of proximal femur in the HFD+TRF group was higher than that in the control group (LSD- t=4.01, P=0.012). The serum levels of leptin in the HFD group were higher than those in the control group (LSD- t=1.45, P=0.030) and the HFD+TRF group (LSD- t=1.62, P=0.018). Conclusion:TRF induces an increase in the values of bone marrow PDFF of proximal femur in conjunction with weight loss in obese rats induced by HFD, and the increase in bone marrow fat may be related to the decrease in serum leptin.

Methimazole-induced agranulocytosis and other hematologic damages: Bone marrow characteristics and literature review / 中华内分泌代谢杂志

Objective:To retrospectively analyze the bone marrow characteristics of methimazole-induced agranulocytosis and other hematologic damage, and to explore its correlation with clinical features and prognosis.Methods:The bone marrow and clinical parameters of 20 patients of Graves′ disease diagnosed with methimazole-induced agranulocytosis at the First Affiliated Hospital of Xi′an Jiaotong University from January 2000 to December 2022 were collected. The intergroup differences in bone marrow characteristics and granulocyte recovery time were analyzed. Differences in peripheral blood and bone marrow characteristics between patients with single agranulocytosis and pancytopenia were compared. Besides, literature review of the bone marrow characteristics of methimazole-induced hematologic diseases was conducted.Results:Compared to patients with bone marrow characteristics of granulocyte and precursor maturation disorders(Type Ⅱ), patients with aplastic marrow(Type Ⅰ) had significant decreases in the proportions of granulocytes in all phases( P<0.05). Patients with bone marrow characteristics of Type Ⅰ had a significant increase in the proportion of the lymphocyte system [51.00%(41.50%, 75.50%) vs 22.00%(14.00%, 35.00%), P=0.002], and got a longer to recovery time [(6.58±1.68)d vs(3.71±1.60)d, P=0.003]; Correlation analysis suggested the granulocyte to erythrocyte ratio was negatively correlated with the granulocyte recovery time( r=-0.520, P=0.023), and the proportion of the bone marrow lymphocyte was positively correlated with granulocyte recovery time( r=0.622, P=0.004). Compared to patients with single agranulocytosis, patients with pancytopenia had a markedly longer hospital stay duration [(27.14±5.27)d vs(14.15±7.36)d, P=0.001]. Literature review suggestsed that methimazole may cause various degrees of damage to blood system and bone marrow. Conclusion:Methimazole can induce a variety of hematologic damages. Analysis of bone marrow characteristics can aid in further prognosis assessment. Clinicians should be vigilant about potential hematologic adverse reactions when using methimazole and promptly diagnose and treat them to prevent serious consequences.

UHPLC-Q-TOF/MS Analysis of the Active Components of Total Flavonoids Extracts from Sarcandra glabra in Promoting Megakaryocyte Differentiation / 中药新药与临床药理

Objective To screen the active components of total flavonoid extracts of Sarcandra glabra to promote megakaryocyte differentiation.Methods(1)A model of megakaryocyte differentiation disorder was established by co-culturing human megakaryocytic leukaemia cells(Dami)with human bone marrow stromal cells(HS-5)as an evaluation system,and the experimental groupings were as follows:the Dami group(Dami),the control group(Dami+HS-5),and the PMA group[Dami+HS-5+5 ng·mL-1 foprolol 12-tetradecanoate 13-acetate(PMA)],and model group[Dami+HS-5+1%rabbit anti-rat platelet serum(APS)+5 ng·mL-1 PMA]were cultured for 48 hours.The expressions of megakaryocyte differentiation and maturation surface marker molecules,CD41a and CD61 were detected by flow cytometry.(2)Forty-nine SD male rats were randomly divided into blank plasma group,15-minute group,30-minute group,60-minute group,90-minute group,120-minute group,and 240-minute group,with 7 rats in each group.The rats in each administration group were gavaged with 1.26 g·kg-1 of total flavonoids extracts of Sarcandra glabra,and blood was collected at six set time points(15,30,60,90,120,240 minutes)for the preparation of time-dependent serum-containing plasma of total flavonoids extracts of Sarcandra glabra.(3)Ultra-high performance liquid chromatography-quadrupole tandem time-of-flight mass spectrometry(UHPLC-Q-TOF/MS)was used to analyze the plasma of the time-dependent serum-containing plasma of the total flavonoids extracts of Sarcandra glabra,and the peak area was used to construct a matrix(X-matrix)of the amount of chemical composition change over time in the time-dependent serum-containing plasma of the total flavonoids extracts of Sarcandra glabra.The collected time-dependent serum-containing plasma of the total flavonoids extracts of Sarcandra glabra at six different time points was used to intervene in the model of megakaryocyte differentiation and maturation disorder,and the expression of cell surface molecules CD41a and CD61 was detected by flow cytometry to construct the matrix of effect of time-dependent serum-containing plasma of the total flavonoids extracts of Sarcandra glabra(Y-matrix).(4)After the data of X and Y matrices were standardized,partial least squares(PLS)was used to calculate and analyze the quantitative and qualitative effect relationship,and variable importance for projection(VIP)>1 was used as the threshold to screen the effect components related to the changes of cell surface molecules CD41a and CD61,and chemical composition identification,as the potential effector components in the total flavonoid extracts of Sarcandra glabra were used to promote the differentiation of megakaryocytes,and finally the regression evaluation system was used to verify the efficacy of its medicinal effect.Results(1)Compared with the Dami group,the expression level of CD41a on the surface of Dami cells in the control group was significantly increased(P＜0.05).Compared with the control group,the expression levels of CD41a and CD61 on the surface of Dami cells in the PMA group were significantly increased(P＜0.01).Compared with the PMA group,the expression levels of CD41a and CD61 on the surface of Dami cells in the model group were significantly reduced(P＜0.01).(2)Compared with the blank plasma group,the expression levels of the molecules CD41a and CD61 on the surface of Dami cells at each time point of 15,30,60,90,120,and 240 minutes were significantly increased(P＜0.01),and the expression levels of CD41a and CD61 were both highest in the 30-minute group.The potential effective components with VIP value greater than 1 were screened out in the positive and negative ion mode,and 540.3638@12.25 and 559.2991@11.53 were selected for pharmacodynamic verification.559.2991@11.53 was identified as daucosterol(Dau),540.3638@12.25 was identified as rosmarinic acid 4-O-β-D-glucoside(Ros).After Ros and Dau intervened in the megakaryocyte differentiation and maturation disorder model respectively,the expression levels of CD41a and CD61 on the surface of Dami cells in the low-,medium-and high-dose groups(40,60 and 80 μg·mL-1)of Ros and Dau were significantly increased compared with the model group(P＜0.05,P＜0.01).Conclusion Ros and Dau may be the active components of the total flavonoids extracts of Sarcandra glabra to promote the differentiation of megakaryocytes.

Discussion on the Pathogenesis and Treatment of Children Enuresis Based on the Theory "Kidney-Marrow-Brain" Axis and "Yin Heel Channel （阴跷脉）" / 中医杂志

Guided by the theory of "kidney generates marrow"， the study elaborates the viewpoint that the route of Yin Heel Channel （阴跷脉） is consistent with the "kidney-marrow-brain" axis from the perspective of the circulation of the meridians and the relationship between the zang-fu organs. Accordingly， it is believed that disease of Yin Heel Channel and dysfunction of the "kidney-marrow-brain" axis are the core pathogenesis of children enuresis， and it is elaborated from the following three major aspects， firstly， insufficient kidney essence， dysfunction of the "kidney-marrow-brain" axis， secondly， disease of Yin Heel Channel and deficiency and cold in lower jiao， and thirdly， disease of Yin Heel Channel and loss of nourishment of Chong Vessel. It is proposed to use the mode of "firstly needle， secondly moxibustion， and lastly consolidation" to treat children enuresis. Needle is to adjust yin and yang， warm yang and tonify kidney， and wake up the brain and open the orifices. The acupoints in Yin Heel Channel such as Zhaohai （KI 6）， Jiaoxin （KI 8） and confluence points of the eight extraordinary vessels such as Waiguan （TE 5）， Zulinqi （GB 41） are used， together with Baihui （GV 20）， Yintang （EX-HN 3）， Guanyuan （CV 4）， Qixue （KI 13）， Dazhong （KI 4）. Moxibustion is to reinforce healthy qi and warm yang， bank up the root and consolidate the original qi by moxibustion at Shenque （CV 8）， Mingmen （GV 4）， and Xuanshu （GV 5）. Consolidation is to use acupoints application to consolidate the therapeutic effect， and Guanyuan （CV 4） & Pangguangshu （BL 28）， Qihai （CV 6） & Zhishi （BL 52）， and Shenque （CV 8） & Ciliao （BL 32） are commonly used as the three groups of acupoints to warm the kidney and stop collapse， regulate and tonify the qi and blood.

Mechanism of musk-containing serum in promoting the migration of bone marrow mesenchymal stem cells / 西安交通大学学报(医学版)

【Objective】 To investigate the effect and mechanism of musk-containing serum on the migration of bone marrow mesenchymal stem cells (BMSCs). 【Methods】 Sixty SD rats were randomly divided into four groups: musk-high-, medium- and low-dose groups and blank control group; medicated serum was prepared. Fifteen SD rats were isolated and cultured with BMSCs, and the third generation of BMSCs were identified by morphology, phenotype, osteogenic and adipogenic induction. BMSCs received medicinal healing intervention with high-, medium- and low- (16.8, 8.4, and 4.2 μL/100 g) musk, and the cell proliferation rate was detected by MTT assay. Under the intervention of the protein kinase C (PKC) signaling pathway (GF109203X), the effect of musk with pharmacition on the migration of BMSCSs was detected with the Transwell test. 【Results】 The rat BMSCs were attached to the wall, with orderly arrangement and good cell viability. Phenotypic identification revealed that the expressions of CD44 and CD90 were positive, while the expressions of CD45 and CD34 were negative, and the cells could differentiate into osteoblasts and adipocytes. The proliferation rates of BMSCSs with different concentrations at different time periods were higher than those in the blank control group (P0.05). 【Conclusion】 The mechanism of musk-containing serum in promoting BMSCs migration may be related to the activation of PKC signaling pathway.

Effect of lumbar bone marrow composition on bone marrow diffusion signal intensity and apparent diffusion coefficient in healthy adult women / 重庆医学

Objective To analyze the effect of lumbar bone marrow composition on bone marrow diffu-sion-weighted imaging(DWI)in healthy adult women.Methods Retrospective analysis was performed on up-per abdominal MRI of 103 adult women.Bone marrow fat fraction of lumbar vertebra was measured according to two-point water-lipid separation technique,and apparent diffusion coefficient(ADC)value of lumbar verte-bra was measured according to DWI image(b=800 s/mm2).The subjects were divided into the high-signal group and the equal-low-signal group according to the signal intensity of lumbar vertebra and adjacent erector spine muscles.The effects of age,lumbar bone marrow fat fraction and menstrual status on the signal intensity and ADC value of lumbar bone marrow diffusion were analyzed.Finally,the correlation between lumbar bone marrow fat fraction and ADC value was analyzed.Results Univariate analysis showed that the lumbar bone marrow diffusion signal intensity and ADC value were affected by age,lumbar bone marrow fat fraction and menstrual status(P＜0.001).Multivariate analysis showed that age(P=0.046)and lumbar bone marrow fat fraction(P=0.005)were the influencing factors of lumbar bone marrow diffusion signal intensity,but men-strual status(P=0.242)was not the influencing factor.In addition,lumbar bone marrow fat fraction(P＜0.001)was the factor influencing the ADC value of lumbar bone marrow,and the two were negatively correla-ted(r=-0.607,P＜0.001),but age(P=0.497)and menstrual status(P=0.082)were not the influencing factors.Conclusion The bone marrow composition of lumbar vertebrae in healthy adult women has significant effects on the signal intensity and ADC value of bone marrow diffusion.

Discussion on the syndrome of toxin and blood stasis in myelodysplastic syndrome from Xuanfu theory / 国际中医中药杂志

Myelodysplastic syndrome (MDS) is a malignant hematologic tumor, which is currently difficult to cure. The theory of Xuanfu was proposed by Liu Wansu, which is unique in the clinical evidence of Chinese medicine and is less frequently applied to hematological diseases. The application of Xuanfu theory in myelodysplastic syndrome provides new ideas for the treatment of the disease. The abnormal flow of Qi, blood and fluids caused by the occlusion of the Xuanfu is the cause of toxic stasis obstruction, which is the pathogenesis of toxic stasis obstruction. Thus, the method of dispersion of Bone from Xuanfu, the external treatment of Xuanfu, and regulation of liver qi and Xuanfu help to return to normal of opening and closing function of Xuanfu, and release toxic stasis. In this paper, we analyzed the evidence of toxin-stasis obstruction in myelodysplastic syndrome from the theory of Xuanfu, aiming to provide a feasible theoretical basis for clinical treatment of the disease.

Effect and mechanism of transplantation bone marrow stromal stem cells transfected NRG1 gene on repair of hemi-transected spinal cord injury in rats / 解放军医学杂志

Objective To investigate the effect and mechanism of transplantation of neuregulin1(NRG1)gene-modified bone marrow mesenchymal stem cells(BMSCs)on the repair of hemi-transected spinal cord injury(SCI)in rats.Methods Isolated and cultured rat BMSCs,followed by transfection with the NRG1 gene.The levels of NRG1 in BMSCs lysate and culture supernatant was deected by ELISA method,and the proliferation activity of the BMSCs was detected by cell counting method.Forty-three healthy 8-week-old SD rats were randomly divided into control group(n=10),SCI model group(n=10),BMSCs group(n=10),and NRG1-BMSCs group(n=13).After establishing the spinal cord hemisection model,animals received in-situ transplantation of BMSCs or NRG1-BMSCs.On the 1,7,14,21,and 28 days after transplantation,the hind limb motor function was evaluated using BBB score and inclined plate test;on the 7th day after transplantation,the migration and distribution of transplanted cells was monitored using a fluorescence microscope;on the 28th day after transplantation,the pathological changes of rat spinal cord tissues was examined using HE staining and Nissl staining;cell apoptosis using TUNEL staining,and levels of endoplasmic reticulum stress-related proteins[X-box binding protein 1(XBP1),C/EBP homologous protein(CHOP),activating transcription factor 4(ATF4),ATF6,glucose-regulated protein 78(GRP78)]and apoptosis-related proteins[B-cell lymphoma-2(Bcl-2)and Bcl-2-associated protein X(Bax)]in rat spinal cord tissues using Western blotting.Results BMSCs were successfully isolated,cultured,and transfected with the NRG1 gene.ELISA method results showed that the NRG1 contents in the NRG1-BMSCs lysate and culture supernatant were significantly higher than that of BMSCs in a time-dependent manner(P<0.05).The proliferation activity of NRG1-BMSCs was significantly higher than that of BMSCs(P<0.05).On the 21 and 28 days after transplantation,the BBB score and the slope angle of the inclined plate in NRG1-BMSCs group were higher than those in SCI model group or BMSCs group(P<0.05).However,it did not reverse to the level in control group(P<0.05).On the 28th day after transplantation,compared with the SCI model group and BMSCs group,neuronal pyknosis reduced,the Nissl body density increased,the expression levels of XBP1,CHOP,ATF4,ATF6,GRP78,and Bax,and the rate of TUNEL-positive cells significantly reduced in NRG1-BMSCs group(P<0.05),and the expression level of Bcl-2 significantly increased(P<0.05).Conclusion Transplantation of NRG1 gene-modified BMSCs can alleviate SCI and improve the recovery of motor function in rats.The mechanism may be related to promoting the proliferation activity of BMSCs,inhibiting cell apoptosis,and mitigating endoplasmic reticulum stress.

Pathological characteristics of angioimmunoblastic T cell lymphoma with bone marrow involvement / 临床与实验病理学杂志

Purpose To explore the pathological features of angioimmunoblastic T-cell lymphoma(AITL)with bone marrow involvement and to improve awareness of bone marrow infiltration in AITL.Methods The tissue morphology of 32 cases of AITL with bone marrow involvement was retrospectively analyzed.Im-munohistochemistry using the EnVision method and ten-color flow cytometry were conducted to detect AITL-related immune markers.T cell clonality was analyzed through T cell receptor(TCR)gene rearrangement.Results The predominant pat-terns of tumor cell infiltration were nodular(20/32,62.5％)and interstitial or small clusters(10/32,31.3％).The nodules showed a mixture of cellular components.In some cases,the fo-ci contained a mixture of cells with characteristic"granuloma-toid"changes.The tumor cells were mainly small to medium-sized lymphocytes with inconspicuous atypia.Some cases showed plasma cell proliferation.19 cases were subject to immunohisto-chemical staining,which revealed a low count of CD4-positive T cells,with an average of 8.4％.The positive rates of T follic-ular helper cells(TFH)markers were as follows:CD10(7/14,50.0％),BCL6(6/19,31.6％),PD-1(13/19,68.4％),and CXCL13(13/19,68.4％).In most cases,tumor cells showed co-expression of PD-1 and CXCL13,but the number of positive cells was less than 1％.Flow cytometry analysis was performed in 24 cases,among which 22 cases all consistently expressed cytoplasmic CD3(cCD3),CD5,CD4,and CD2,with varying degrees of CD10 expression.In some cases,there was a lack of expression of surface CD3(sCD3)(12/22,54.5％),while there was a lack of expression of CD7(8/22,36.4％).and no abnormal T cells were found in 2 cases.TCR gene rearrangement analysis was performed in 7 cases,with 3 cases showing TCR clonality.Conclusion AITL with bone marrow involvement exhibits a lower proportion of tumor cells and less atypia,making it prone to misdiagnosis.The presence of lymphocytic foci with mixed cellular components in the bone marrow can indicate bone marrow involvement in AITL.Flow cy-tometry detection of abnormal T cells(double positive for CD4 and CD10)strongly suggests bone marrow infiltration in AITL.A comprehensive diagnosis of bone marrow involvement in AITL re-quires consideration of bone marrow biopsy,flow cytometry,and TCR gene rearrangement analysis.

Zoledronic acid affects osteogenic differentiation and bone formation by regulating the expression of SIRT3/P53 / 中华内分泌外科杂志

Objective:To explore the mechanism of zoledronic acid (ZOL) affects osteogenic differentiation and bone formation through the regulation of sirtuin 3 (SIRT3) / P53 expression.Methods:Bone marrow mesenchymal stem cells (BMSCs) were induced to differentiate into osteogenic cells, the expression of SIRT3 in the cells was detected, and the targeting regulation relationship between SIRT3 and P53 was analyzed. The intracellular expressions of SIRT3 and P53 were intervened and ZOL was used to treat the cells. MTT method, Western blot method and kit were used to detect cell viability, osteogenesis-related genes Osteoprotegerin (OPG), runt-related transcription factor 2 (Runx2) expression, alkaline phosphatase (ALP) activity and alizarin red S (ARS) staining, respectively. Ovariectomy (OVX) was used to construct a rat model and explore the effect of ZOL on the progression of osteoporosis (OP) in vivo.Results:ZOL promoted osteogenic differentiation of BMSCs. The expression of SIRT3 was down-regulated in the serum of OP patients (0.78±0.23) compared with that of healthy subjects (1.00±0.26 vs. 0.78±0.23. t=3.85, P<0.001). During the osteogenic differentiation of BMSCs, the expression level of SIRT3 gradually increased with the prolonged induction of osteogenesis. Compared with the p53 protein expression and BMSCs activity in the control group, SIRT3 knockout could increase the expression level of p53 protein (0.59±0.05 vs. 1.01±0.11. t=6.02, P=0.004) but inhibited the activity of BMSCs (100.00±8.41 vs. 51.26±5.59. t=8.36, P=0.001). After ZOL treatment, the inhibitory effect of SIRT3 on cell viability (49.61±5.11 vs. 87.61±7.31. t=7.38, P=0.002) and osteogenesis was relieved, and the level of P53 was inhibited (1.10±0.10 vs. 0.69±0.04. t=6.59, P=0.003). P53 overexpression partially offseted the effects of ZOL on cell viability (84.61±6.52 vs. 66.54±5.47. t=3.68, P=0.021) and osteogenesis. Compared with the sham surgery group, the OVX group showed inhibition of osteogenesis in rats, and ZOL treatment significantly improved osteogenic inhibition. ZOL treatment increased the expression level of SIRT3 protein in bone tissue of OVX rats, but inhibited the expression level of P53. Conclusion:ZOL promoted osteogenic differentiation and bone formation of BMSCs by promoting the ubiquitination and degradation of P53 by SIRT3.

PRMT7 Regulates Adipogenic Differentiation of hBMSCs by Modulating IGF-1 Signaling / 生物化学与生物物理进展

ObjectiveProtein arginine methyltransferases (PRMTs) play pivotal roles in numerous cellular biological processes. However, the precise regulatory effects of PRMTs on the fate determination of mesenchymal stromal/stem cells (MSCs) remain elusive. Our previous studies have shed light on the regulatory role and molecular mechanism of PRMT5 in MSC osteogenic differentiation. This study aims to clarify the role and corresponding regulatory mechanism of PRMT7 during the adipogenic differentiation of bone marrow-derived mesenchymal stem cells (BMSCs). Methods(1) Human bone marrow-derived mesenchymal stem cells (hBMSCs) were cultured in a medium that induces adipogenesis. We used qRT-PCR and Western blot to monitor changes in PRMT7 expression during adipogenic differentiation. (2) We created a cell line with PRMT7 knocked down and assessed changes in PRMT7 expression and adipogenic capacity using Oil Red O staining, qRT-PCR and Western blot. (3) We implanted hBMSCs cell lines mixed with a collagen membrane subcutaneously into nude mice and performed Oil Red O staining to observe ectopic lipogenesis in vivo. (4) A cell line overexpressing PRMT7 was generated, and we examined changes in PRMT7 expression using qRT-PCR and Western blot. We also performed Oil Red O staining and quantitative analysis after inducing the cells in lipogenic medium. Additionally, we assessed changes in PPARγ expression. (5) We investigated changes in insulin-like growth factor 1 (IGF-1) expression in both PRMT7 knockdown and overexpressing cell lines using qRT-PCR and Western blot, to understand PRMT7’s regulatory effect on IGF-1 expression. siIGF-1 was transfected into the PRMT7 knockdown cell line to inhibit IGF-1 expression, and knockdown efficiency was confirmed. Then, we induced cells from the control and knockdown groups transfected with siIGF-1 in lipogenic medium and performed Oil Red O staining and quantitative analysis. Finally, we assessed PPARγ expression to explore IGF-1’s involvement in PRMT7’s regulation of adipogenic differentiation in hBMSCs. Results(1) During the adipogenesis process of hBMSCs, the expression level of PRMT7 was significantly reduced (P<0.01). (2) The adipogenic differentiation ability of PRMT7 knockdown group was significantly stronger than that of control group (P<0.001). (3) The ectopic adipogenic differentiation ability of PRMT7 knockdown group was significantly stronger than that of control group. (4) The adipogenic differentiation ability of the PRMT7 overexpression group was significantly weaker than that of the control group (P<0.01). (5) The expression level of IGF-1 increased after PRMT7 knockdown (P<0.000 1). The expression level of IGF-1 decreased after PRMT7 overexpression (P<0.000 1), indicating that PRMT7 regulates the expression of IGF-1. After siIGF-1 transfection, the expression level of IGF-1 in all cell lines decreased significantly (P<0.001). The ability of adipogenic differentiation of knockdown group transfected with siIGF-1 was significantly reduced (P<0.01), indicating that IGF-1 affects the regulation of PRMT7 on adipogenic differentiation of hBMSCs. ConclusionIn this investigation, our findings elucidate the inhibitory role of PRMT7 in the adipogenic differentiation of hBMSCs, as demonstrated through both in vitro cell-level experiments and in vivo subcutaneous transplantation experiments conducted in nude mice. Mechanistic exploration revealed that PRMT7’s regulatory effect on the adipogenic differentiation of hBMSCs operates via modulation of IGF-1 signaling pathway. These collective findings underscore PRMT7 as a potential therapeutic target for fatty metabolic disorders, thereby offering a novel avenue for leveraging PRMT7 and hBMSCs in the therapeutic landscape of relevant diseases.