This study aimed to characterize and identify the non-volatile components in aqueous and ethanolic extracts of the stems and leaves of Rhododendron tomentosum by using sensitive and efficient ultra-performance liquid chromatography-quadrupole-time of flight mass spectrometry(UHPLC-Q-TOF-MS) combined with a self-built information database. By comparing with reference compounds, analyzing fragment ion information, searching relevant literature, and using a self-built information database, 118 compounds were identified from the aqueous and ethanolic extracts of R. tomentosum, including 35 flavonoid glycosides, 15 phenolic glycosides, 12 flavonoids, 7 phenolic acids, 7 phenylethanol glycosides, 6 tannins, 6 phospholipids, 5 coumarins, 5 monoterpene glycosides, 6 triterpenes, 3 fatty acids, and 11 other types of compounds. Among them, 102 compounds were reported in R. tomentosum for the first time, and 36 compounds were identified by comparing them with reference compounds. The chemical components in the ethanolic and aqueous extracts of R. tomentosum leaves and stems showed slight differences, with 84 common chemical components accounting for 71.2% of the total 118 compounds. This study systematically characterized and identified the non-volatile chemical components in the ethanolic and aqueous extracts of R. tomentosum for the first time. The findings provide a reference for active ingredient research, quality control, and product development of R. tomentosum.
Rhododendron/chemistry* ; Chromatography, High Pressure Liquid/methods* ; Drugs, Chinese Herbal/chemistry* ; Mass Spectrometry/methods* ; Plant Leaves/chemistry*

The lungs are the most common sites of metastases from non-pulmonarymalignancies. Endobronchial metastases are rare and have no specificity in clinical manifestations,thus being prone to misdiagnosis and delayed treatment.The common tumors associated with endobronchial metastasis are renal,breast,and colorectal cancers.This article reported one case of postoperative rectal cancer with endobronchial and lung metastases,which was relieved by high-frequency electrocautery ablation via bronchoscope,chemotherapy,and targeted drugs,aiming to provide a reference for clinical diagnosis and treatment.
Humans ; Rectal Neoplasms/pathology* ; Electrocoagulation/methods* ; Bronchial Neoplasms/drug therapy* ; Bronchoscopy ; Lung Neoplasms/secondary* ; Bronchoscopes

OBJECTIVE: To explore the safety and efficacy of high-dose etoposide (VP-16) combined with recombinant human granulocyte colony-stimulating factor (rhG-CSF) as salvage mobilization for peripheral blood stem cells (PBSC) in newly diagnosed multiple myeloma (NDMM) patients. METHODS: From April 2021 to May 2023, eight NDMM patients who had failed to yield sufficient PBSC during initial mobilization with high-dose cyclophosphamide (CTX) combined with rhG-CSF underwent salvage mobilization with 1.2 g/m2 etoposide combined with rhG-CSF 10 μg/(kg·d). The effects and adverse reactions of initial mobilization and salvage mobilization were analyzed. RESULTS: For salvage mobilization and initial mobilization, the numbers of PBSC collections were 16 and 18, respectively. The mean value of total collected CD34⁺ cells were (11.90±5.75)×10⁶/kg and (1.67±0.75)×10⁶/kg (P =0.0010) in salvage mobilization group and initial mobilization group, respectively. The proportion of patients with a total collection of CD34⁺ cell count≥2×10⁶/kg were 100% and 37.5% (P =0.0625), and the proportion of patients with a total collection of CD34⁺ cell count≥5×10⁶/kg were 87.5% and 0% (P =0.0156) in salvage mobilization group and initial mobilization group, respectively. For five patients who underwent high-dose CTX initial mobilization but had a total CD34⁺ cell count < 2×10⁶/kg, successful collection was achieved through salvage mobilization with high-dose VP-16. Salvage mobilization with high-dose VP-16 was scheduled 2-3 weeks after failure of CTX mobilization. Adverse reactions of high-dose VP-16 mobilization did not increase compared to the initial mobilization with high-dose CTX. CONCLUSION As a salvage mobilization regimen, VP-16 1.2 g/m² combined with rhG-CSF is safe and highly effective in NDMM patients who failed to initial mobilization with high-dose CTX combined with rhG-CSF.
Humans ; Multiple Myeloma/therapy* ; Etoposide/therapeutic use* ; Hematopoietic Stem Cell Mobilization/methods* ; Cyclophosphamide/therapeutic use* ; Granulocyte Colony-Stimulating Factor ; Salvage Therapy ; Peripheral Blood Stem Cells ; Male ; Middle Aged ; Female ; Peripheral Blood Stem Cell Transplantation

Acute mitochondrial damage and the energy crisis following axonal injury highlight mitochondrial transport as an important target for axonal regeneration. Syntaphilin (Snph), known for its potent mitochondrial anchoring action, has emerged as a significant inhibitor of both mitochondrial transport and axonal regeneration. Therefore, investigating the molecular mechanisms that influence the expression levels of the snph gene can provide a viable strategy to regulate mitochondrial trafficking and enhance axonal regeneration. Here, we reveal the inhibitory effect of microRNA-146b (miR-146b) on the expression of the homologous zebrafish gene syntaphilin b (snphb). Through CRISPR/Cas9 and single-cell electroporation, we elucidated the positive regulatory effect of the miR-146b-snphb axis on Mauthner cell (M-cell) axon regeneration at the global and single-cell levels. Through escape response tests, we show that miR-146b-snphb signaling positively regulates functional recovery after M-cell axon injury. In addition, continuous dynamic imaging in vivo showed that reprogramming miR-146b significantly promotes axonal mitochondrial trafficking in the pre-injury and early stages of regeneration. Our study reveals an intrinsic axonal regeneration regulatory axis that promotes axonal regeneration by reprogramming mitochondrial transport and anchoring. This regulation involves noncoding RNA, and mitochondria-associated genes may provide a potential opportunity for the repair of central nervous system injury.
Animals ; Zebrafish ; MicroRNAs/genetics* ; Nerve Regeneration/physiology* ; Mitochondria/metabolism* ; Zebrafish Proteins/genetics* ; Axons/metabolism* ; Signal Transduction/physiology* ; Axonal Transport/physiology* ; Nerve Tissue Proteins/genetics*

Promoting the construction of a “Healthy China” is essential to building a great modern socialist country. Health workers in every era have their historical missions and they are the “benevolent doctors” of their own era. Therefore， clarifying the basic connotation and times requirements of “benevolent doctors” has become the first question to be answered in cultivating “benevolent doctors”. The basic connotation of “benevolent doctor” should reflect not only the comprehensive development of moral， intellectual， physical， aesthetic， and labor education in fostering virtue and nurturing talents， but also embody the people-centered development philosophy， promote social equity and justice， and reflect the strategic needs of building a “Healthy China.” Specifically in the practice of medical education， emphasizing both medical science spirit and medical humanities spirit has become an important path to cultivate “benevolent doctors” in the new era.

Objective To investigate the effect and mechanism of edaravone(Eda)on myocardial injury in chronic heart failure(CHF)rats by regulating Notch/Hes-1 signaling pathway.Methods The CHF rat model was established and the rats were separated into sham surgery(S)group,model(M)group,low dose Eda(Eda-L)group,medium dose Eda(Eda-M)group,high dose Eda(Eda-H)group,and Eda-H+Notch signal pathway inhibitor DAPT(Eda-H+DAPT)group,with 25 rats in each group.Echocardiography was applied to detect the levels of left ventricular end diastolic diameter(LVEDd),left ventricular end-systolic diameter(LVEDs),and left ventricular ejection fraction(LVEF)in rats.ELISA was applied to detect levels of tumor necrosis factor-α(TNF-α),interleukin(IL)-1β,IL-6,malondialdehyde(MDA),superoxide dismutase(SOD),and angiotensin Ⅱ(Ang Ⅱ)in serum.Myocardial infarction was observed by 2,3,5-triphenyl tetrazolium chloride(TTC)staining.HE staining,TUNEL staining and Masson staining were applied to observe the morphological changes of myocardial tissue,myocardial cell apoptosis and myocardial fibrosis respectively.immunohistochemistry was applied to detect the expression of collagen Ⅰ and angiotensin converting enzyme 2(ACE2)proteins in myocardial tissue.Western blotting was applied to detect the expression of Notch 1,Hes-1,transforming growth factor-β1(TGF-β1),Bcl-2,Bax,and Caspase-3 proteins in myocardial tissue.Results Compared with the sham group,the distribution of cardiomyocytes in model group was disordered,and severe inflammatory symptoms.There was a large amount of blue collagen deposition between the perivascular area and the myocardium.The LVEDd,LVEDs,TNF-α,IL-1β,IL-6,MDA and Ang Ⅱ levels,myocardial infarction size,cardiomyocyte apoptosis rate,Collagen Ⅰ,Bax,Caspase-3 and TGF-β1 protein expressions increased obviously(P＜0.05),the LVEF,SOD levels,ACE2,Bcl-2,Notch 1,and Hes-1 protein expressions were obviously reduced(P＜0.05).Compared with the model group,the myocardial tissue damage was reduced in the Eda-L,Eda-M,and Eda-H groups,with reduced inflammatory cell infiltration and collagen deposition;The LVEDd,LVEDs,TNF-α,IL-1β,IL-6,MDA and Ang Ⅱ levels,myocardial infarction size,cardiomyocyte apoptosis rate,collagen Ⅰ,Bax,Caspase-3 and TGF-β1 protein expressions reduced obviously(P＜0.05),the LVEF,SOD levels,ACE2,Bcl-2,Notch 1,and Hes-1 protein expressions increased obviously(P＜0.05).Notch signaling pathway inhibitor DAPT reversed the protective effect of edaravone on myocardial injury in rats with CHF(P＜0.05).Conclusion Edaravone may improve myocardial injury in CHF rats by activating Notch/Hes-1 signaling pathway.

AIM:To establish methods for the isolation,identification,primary culture and evaluation of gas-tric smooth muscle cells(GSMC)from rat and mouse.METHODS:Thirty SD rats and thirty C57BL/6 mice were random-ly assigned into three groups,with 10 rats or mice in each group.Three parallel experiments were conducted to isolate pri-mary GSMC under aseptic conditions.The isolated cells were identified through morphological observation,immunofluo-rescence and Western blot.Flow cytometry was employed to analyze the purity of the cells.Additionally,trypan blue ex-clusion test was utilized to evaluate the viability of the cells after resuscitation.RESULTS:Isolated rat and mouse GSMC exhibited a fusiform or polygonal morphology.Immunofluorescence and Western blot results demonstrated the expression of α-smooth muscle actin(α-SMA).Flow cytometry showed that the positive expression rate of α-SMA was 99.6%in rat GSMC and 97.4%in mouse GSMC.Moreover,the viability rates of rat and mouse GSMC after cryopreservation were found to be greater than 97%.CONCLUSION:A stable and reliable method for the isolation,culture and evaluation of primary GSMC from rat and mouse has been established.

Objective:To investigate whether the rs612529 C/T and rs11669663 G/A in VSTM1 gene are associated with leukocyte signaling inhibitory receptor-1(SIRL-1)expression and an increased risk for systemic lupus erythematosus(SLE)in a Han Chinese cohort.Methods:A total of 200 patients with SLE and 218 healthy controls(HC)were enrolled.Relevant laboratory characteris-tics of patients with SLE were also collected.Genotyping of rs612529 C/T and rs11669663 G/A were performed by Sanger sequencing technology.SIRL-1 expression was assessed in peripheral blood neutrophils and monocytes was detected by flow cytometry.Levels of autoantibodies associated with SLE were detected by ELISA.Results:In both SLE group and HC,the C allele of rs612529 was asso-ciated with a decreased expression level of SIRL-1 on monocytes,with a gradual increased in SIRL-1 protein level from the CC over the CT to the TT genotype.C allele of rs612529 was associated with higher serum anti-dsDNA antibody titers in patients with SLE(P<0.05).In the case of rs11669663 G/A,no significant association of genotypes with SLE susceptibility was detected.Conclusion:VSTM1 rs612529 C/T may contribute to SLE disease activity and regulate SIRL-1 expression on monocytes in the Han Chinese cohort.

Objective To develop a deep learning model based on fundus retinal images to improve the detection rate of mild cognitive impairment(MCI)in patients with coronary heart disease,achieve early intervention and improve prognosis.Methods The study was a single-center cross-sectional study that retrospectively included patients diagnosed with coronary heart disease(CHD)by coronary angiography(≥50％ stenosis of at least one coronary vessel)from Beijing Anzhen Hospital between November 2021 and December 2022.The whole data set was randomly divided into the training set and the testing set according to the ratio of 8∶2 for model development.After that,the patient data of the same center from January 2023 to April 2023 were included in the time verification method to verify the model.The diagnostic criteria for MCI were MMSE＜27 or MoCA＜26.Four kinds of convolutional neural network(CNN)architectures were used to train fundus images,and a comprehensive vision model of MCI detection was established through model integration.The area under the curve(AUC),sensitivity and specificity of the receiver operating curve(ROC)were used to evaluate the performance of the AI model.Results We collected 5 880 eligible fundus images from 3 368 CHD patients.Based on the results of the MMSE scale,the algorithm was labeled,including 2 898 males and 527 MCI patients.The AUC of the deep learning model in the test group is 0.733(95％CI 0.688-0.778),and the sensitivity of the algorithm in the test group is 0.577(95％CI 0.528-0.625)by using the operating point with the maximum sum of sensitivity and specificity.With a specificity of 0.758(95％CI 0.714-0.802),corresponding to a validated AUC of 0.710(95％CI 0.601-0.818).Based on the results of the MoCA scale,the algorithm labels 2 437 males and 1 626 MCI patients.The AUC of the deep learning model in the test group was 0.702(95％CI 0.671-0.733).The operating point with the maximum sum of sensitivity and specificity was selected,and the sensitivity of the algorithm was 0.749(95％CI 0.719-0.778)and the specificity was 0.561(95％CI 0.527-0.595),corresponding to the AUC value of the verification group was 0.674(95％CI 0.622-0.726).Conclusions The deep learning algorithm model based on fundus images has good diagnostic performance,and may be used as a new non-invasive,convenient and rapid screening method for MCI in CHD population.