Objective To explore the rehabilitation effect of abdominal breathing training and the improvement status of cardiopulmonary function in elderly patients with chronic obstructive pulmonary disease (COPD) over 60 years old. Methods A total of 520 COPD patients over 60 years old admitted to the hospital were selected from June 2021 to March 2024 as the research subjects. The patients were divided into reference group (routine intervention, n=260) and abdominal rehabilitation group (abdominal breathing training on the basis of routine intervention, n=260) by adopting computer random function. Cardiopulmonary tolerance, respiratory muscle condition and pulmonary function markers were compared between the two groups before and after intervention. Results Compared with the reference group after intervention, the abdominal rehabilitation group had higher maximum oxygen uptake and minute ventilation volume, lower anaerobic threshold, and higher maximal expiratory pressure (MEP). The maximal inspiratory pressure (MIP), forced expiratory volume in one second (FEV1), forced expiratory volume (FVC), ratio of forced expiratory volume to forced vital capacity in one second (FEV1/FVC), the percentage of FEV1 to the predicted value (FEV1%pred) and 1 min maximum ventilation volume (MVV) (P<0.05) were all higher in the abdominal rehabilitation group than the reference group after intervention. Conclusion Abdominal breathing training for patients with COPD over 60 years old can effectively enhance cardiopulmonary tolerance, and improve respiratory muscle physiology and pulmonary function.

Nipah virus (NiV) and related viruses form a distinct henipavirus genus within the Paramyxoviridae family. NiV continues to spillover into the humans causing deadly outbreaks with increasing human-bat interaction. NiV encodes the large protein (L) and phosphoprotein (P) to form the viral RNA polymerase machinery. Their sequences show limited homologies to those of non-henipavirus paramyxoviruses. We report two cryo-electron microscopy (cryo-EM) structures of the Nipah virus (NiV) polymerase L-P complex, expressed and purified in either its full-length or truncated form. The structures resolve the RNA-dependent RNA polymerase (RdRp) and polyribonucleotidyl transferase (PRNTase) domains of the L protein, as well as a tetrameric P protein bundle bound to the L-RdRp domain. L-protein C-terminal regions are unresolved, indicating flexibility. Two PRNTase domain zinc-binding sites, conserved in most Mononegavirales, are confirmed essential for NiV polymerase activity. The structures further reveal anchoring of the P protein bundle and P protein X domain (XD) linkers on L, via an interaction pattern distinct among Paramyxoviridae. These interactions facilitate binding of a P protein XD linker in the nucleotide entry channel and distinct positioning of other XD linkers. We show that the disruption of the L-P interactions reduces NiV polymerase activity. The reported structures should facilitate rational antiviral-drug discovery and provide a guide for the functional study of NiV polymerase.
Nipah Virus/chemistry* ; Cryoelectron Microscopy ; Viral Proteins/genetics* ; RNA-Dependent RNA Polymerase/genetics* ; Phosphoproteins/genetics* ; Humans ; Models, Molecular ; Protein Binding

N⁶-methyladenosine (m⁶A) modification plays a critical role in cell cycle regulation, while the mechanism of m⁶A in regulating mitosis remains underexplored. Here, we found that the total m⁶A modification level in cells increased during mitosis by the liquid chromatography-mass spectrometry/mass spectrometry and m⁶A dot blot assays. Silencing methyltransferase-like 3 (METTL3) or METTL14 results in delayed mitosis, abnormal spindle assembly, and chromosome segregation defects by the immunofluorescence. By analyzing transcriptome-wide m⁶A targets in HeLa cells, we identified polo-like kinase 1 (PLK1) as a key gene modified by m⁶A in regulating mitosis. Specifically, through immunoblotting and RNA pulldown, m⁶A modification inhibits PLK1 translation via YTH N⁶-methyladenosine RNA binding protein 1, thus mediating cell cycle homeostasis. Demethylation of PLK1 mRNA leads to significant mitotic abnormalities. These findings highlight the critical role of m⁶A in regulating mitosis and the potential of m⁶A as a therapeutic target in proliferative diseases such as cancer.
Humans ; Polo-Like Kinase 1 ; Cell Cycle Proteins/metabolism* ; Proto-Oncogene Proteins/metabolism* ; Protein Serine-Threonine Kinases/metabolism* ; Mitosis/physiology* ; HeLa Cells ; Adenosine/genetics* ; Methyltransferases/metabolism* ; RNA, Messenger/metabolism* ; RNA-Binding Proteins/metabolism*

OBJECTIVE To investigate the HRCT and MRI characteristic of external auditory canal cholesteatoma(EACC)in children.METHODS A total of 40 patients(45 lesions)with EACC confirmed by pathology were retrospectively analyzed with HRCT and MRI characteristics and clinical therapeutic value.Imaging findings of 40 patients(45 lesions)with EACC were retrospectively analyzed.RESULTS Soft tissues were found in all the external auditory canal(EAC).Of the forty-five soft tissues,7 manifested as inhomogeneous strip soft tissues and 38 as lesions solid soft tissues;30 located in medial part of the EAC and covered the tympanic membrane,while the other 15 presented as tympanic membrane perforation and involved the tympanic cavity.The MRI of the 3 ears showed high signal on T2/T1 iso-intensity,high signal on DWI,and low signal on ADC.Normal whole bony EAC was observed in 17 cases and enlarged medial EAC in 28 cases.Seven cases only involved in the superior wall,but 38 cases displayed as multiple bone wall involved,of which 6 involved in circumferential walls.Thirty-three cases displayed atactic ear bone margin,11 displayed blunted or disappeared drum shield plate.Destroy of long crus of incus and manubrium mallei occurred in 15 cases,of short crus of incus in 8 cases,of stapes in 2 cases,and mastoiditis in 5 cases.According to the pneumatization degree of mastoid air cell,37 cases were classified into pneumatic type,7 cases into mixed type,and the last one into diploic type.CONCLUSION The children EACC tends to be limited and rarely involved in middle ear and mastoid process.No patient with peri-ear infection was found.Application of HRCT and MRI help accurate location and determination of cholesteatoma.According to the extent of the lesion,selecting the appropriate surgical method is an effective method to remove cholesteatoma,improve hearing and reduce recurrence.

Objective:To explore the application effect of online and offline BOPPPS teaching mode based on rain-classroom in ideological and political teaching of Dermatovenerology.Methods:A total of 242 undergraduates from Class 1 to Class 8 majoring in Medical Imaging in grade 2019 were selected.They were randomly divided into the control group(class 5 to class 8)and the experimental group(class 1 to class 4).The control group received the mixed online and offline teaching mode based on rain-classroom.The experimental group received the online and offline BOPPPS teaching mode based on rain-classroom.The ideological and political elements were integrated into the teaching of Dermatovenerology.After the course,the score of curriculum theory,the questionnaire survey of ideological and political teaching and the questionnaire survey of the satisfaction of teaching in the two groups were compared.Results:After the course,the score of curriculum theory in the experimental group was higher than that in the control group(P＜0.01).The approval rate of each question in the questionnaire on ideological and political teaching effect of the experimental group was higher than that of the control group(P＜0.05).The teaching satisfaction of the experimental group was higher than that of the control group(P＜0.05).Conclusion:In the ideological and political teaching of Dermatovenerology,the online and offline BOPPPS teaching mode based on the rain-classroom has a certain effect on improving the course performance,ideological and political education effect and students'satisfaction.

Objective To investigate the clonal rearrangement characteristics and clinical application value of IGH gene in B-cell non-Hodgkin's lymphoma(B-NHL).Methods Demographic and clinical data as well as IGH sequencing results of 55 patients with B-NHL who underwent next-generation sequencing(NGS)testing were collected,and IGH gene clonal rearrangement was detected.The characteristics of IGH gene clonal rearrangement,IGHV gene usage,and the clinical application value of NGS for IGH clonal rearrangement were analyzed.Results Among 55 patients with B-NHL and IGH clonal rearrangement,single dominant clones were mainly detected(85.45%,47/55);a few patients had two(12.73%,7/55)and three dominant clones(1.82%,1/55).In terms of preference for IGHV gene usage,IGHV3 gene had the highest frequency of access in B-NHL,followed by IGHV4.Among the IGHV subtypes,IGHV3-23 had the highest frequency in chronic lymphocytic leukemia/small lymphocytic lymphoma,and IGHV4-34 had the highest frequency in primary central nervous system diffuse large B-cell lymphoma and not otherwise specified diffuse large B-cell lymphoma.Conclusion A preference for IGHV gene usage in clonal rearr-angement of IGH genes is noted in B-NHL patients with different pathological types.Using NGS to detect IGHclonal rearrangement can identify subclones and clonal correlations,and assist in disease diagnosis.

Objective To systematically evaluate and integrate the experiences of people living with HIV in peer support,and to provide references and suggestions for improving peer support for HIV patients in clinical practice.Methods The computer retrieval was performed in PubMed,CINAHL(EBSCO),Web of Science,ProQuest,CNKI and Wanfang Data from January 1,1996 to September 30,2022,to collect qualitative studies in the experience of people living with HIV participating in peer support.This qualitative systematic review was conducted under the Joanna Briggs Institute guideline.This paper was written according to the enhancing transparency in reporting the synthesis of qualitative research(ENTREQ).Results A total of 7 qualitative studies were included,and 26 findings were extracted,which were summarized into 12 categories and integrated into 4 synthesized findings.Findings included that peer support provides patients with information and help them establish and maintain a healthy lifestyle;patients receive emotional support in peer support;patients receive instrumental support in peer support;the objective requirements and scenarios of peer support.Conclusion AIDS peer support has a positive effect on AIDS prevention and treatment,and it is important to address the practical needs of people living with HIV/AIDS.The practice of HIV peer support needs further theoretical support and scientific guidance.Building an HIV peer support model,providing systematic training and professional guidance to HIV peers is conducive to improving the accuracy of HIV peer support behaviors,the development of HIV peer support activities,and optimizing the effectiveness and sustainability of peer support for people living with HIV/AIDS.

Objective:To explore the effect of cluster nursing in robot-assisted surgery for the treatment of reducible atlantoaxial dislocation.Methods:A retrospective cohort study was conducted to analyze the clinical data of 41 patients with reducible atlantoaxial dislocation treated by robot-assisted surgery in Honghui Hospital affiliated to Xi′an Jiaotong University from January 2019 to December 2021, including 28 males and 13 females; aged 18-79 years [(45.2±10.3)years]. Ninteen patients received cluster nursing (cluster nursing group), with operating room nursing team set up on the basis of routine nursing and performed cluster nursing in line with evidence-based medicine. Twenty-two patients received routine nursing (routine nursing group). The operation time, intraoperative blood loss, frequency of intraoperative C-arm fluoroscopy, time of drainage tube placement and chief surgeon′s satisfaction for nursing were compared between the two groups. The degree of pain was evaluated by pain numerical score (NRS) at 12 hours, 24 hours, 48 hours, 72 hours, 1 month and 3 months after operation and at the last follow-up. The neck disability index (NDI) was assessed at 1 day before operation, 1 month after operation, 3 months after operation and at the last follow-up. The complications were observed.Results:All patients were followed up for 12-18 months [(16.7±3.7)months]. The operation time, intraoperative blood loss, frequency of C-arm fluoroscopy and time of drainage tube placement in cluster nursing group were (82.9±10.4)minutes, (105.9±11.8)ml, (3.8±0.6)times and (1.5±0.4)days, while those in routine nursing group were (125.7±12.8)minutes, (208.4±13.8)ml, (9.7±2.3)times and (3.6±0.6)days, respectively (all P<0.01). The chief surgeon′s satisfaction for nursing was 94.7% (18/19) in cluster nursing group and was 68.2% (15/22) in routine nursing group ( P<0.05). The NRS in cluster nursing group was (6.2±0.4)points, (6.0±0.7)points, (4.9±1.1)points, (2.7±0.5)points, (1.9±0.4)points, (1.8±0.4)points and (1.5±0.3)points at 12 hours, 24 hours, 48 hours, 72 hours, 1 month and 3 months after operation and at the last follow-up, while it was (7.6±0.6)points, (6.8±1.2)points, (5.8±1.5)points, (4.2±0.8)points, (3.4±0.7)points, (2.6±0.5)points and (2.2±0.5)points in routine nursing group ( P<0.05 or 0.01). There was no significant difference in the NDI between the two groups at 1 day before operation, but the NDI in cluster nursing group was 20.6±4.5, 14.6±2.8 and 10.7±2.5 at 1 month and 3 months after operation and at the last follow-up, while it was 26.9±4.1, 18.7±3.3 and 13.7±1.7 in routine nursing group (all P<0.01). There was no hematoma, infection or implant-related complications in both groups .Conclusion:For robot-assisted surgery in the treatment of reducible atlantoaxial dislocation, cluster nursing is associated with shortened operation time and time of drainage tube placement, decreased intraoperative blood loss and frequency of intraoperative fluoroscopy, increased chief surgeon′s satisfaction for nursing, reduced pain and accelerated functional recovery.

Objective:To establish the normal reference value of left ventricular function parameters by cadmium-zinc-tellurium (CZT) SPECT stress gated myocardial perfusion imaging (G-MPI) in low-likelihood of stable coronary artery disease (SCAD).Methods:From March 2022 to August 2022, 348 consecutive SCAD patients (146 males, 202 females, age (58±10) years) who underwent exercise or pharmacological stress G-MPI (CZT SPECT) in Beijing Anzhen Hospital, Capital Medical University were retrospectively recruited. Left ventricular end-diastolic volume (EDV), end-systolic volume (ESV), and left ventricular ejection fraction (LVEF) were acquired using quantitative gated SPECT (QGS) analysis. EDV and ESV were corrected by body surface area (BSA) to obtain EDV index (EDVI) and ESV index (ESVI), respectively. Independent-sample t test, one-way analysis of variance and Mann-Whitney U test were used for data analysis. The influences of EDV, ESV, EDVI, ESVI and LVEF were analyzed by multiple regressions for linear models. Results:There were 314 patients with low-likelihood of SCAD (128 males, 186 females, age (58±10) years) and 34 normal controls (18 males, 16 females, age (55±10) years). There were no significant differences of basic clinical characteristics and left ventricular function parameters in different genders between 2 groups ( z values: from -1.74 to -0.02, t values: from -1.16 to 1.17, all P>0.05). Using the 95% CI as the cut-off value for left ventricular function parameters in patients with a low-likelihood of SCAD, the upper limits of EDV, ESV, EDVI and ESVI in females and males were 84 and 111 ml, 30 and 44 ml, 47 and 54 ml/m 2, 17 and 21 ml/m 2, respectively, and the lower limit of LVEF in females and males were 58% and 55%, respectively. In the low-likelihood of SCAD group, the EDV ((58±13) vs (77±17) ml) and ESV ((16±7) vs (26±9) ml) of females were smaller than those of males ( t values: 10.65, 10.35, both P<0.001), while LVEF of females was higher than that of males ((72±7)% vs (67±6)%; t=-6.23, P<0.001). However, there were no significant differences in left ventricular function parameters among different age groups with the same gender ( F values: 0.12-2.19, all P>0.05). Based on multiple regression for linear models, the primary predictors of EDV, ESV and LVEF were gender and weight ( β values: from -0.380 to 0.358, all P<0.05). Conclusions:Normal reference values of left ventricular function parameters are established by CZT SPECT stress G-MPI in low-likelihood of SCAD patients. Left ventricular EDV and ESV of females are smaller than those of males, while LVEF of females is higher than that of males. The influence of gender on left ventricular function parameters should be considered in clinical practice.

【Objective】 To reduce the occurrence of adverse reactions to blood donation during platelet collection in female blood donors with low body weight and high platelet count, so as to improve the comfortableness during platelet collection and increase the proportion of repeated blood donors. 【Methods】 The control group and observation group were compared to explore the causes that may cause adverse reactions in the blood collection cycle using blood collection process program software in MCS⁺, and the incidence of blood donation reaction was compared and observed by increasing the times of oral administrations of calcium gluconate by 10%, increasing the number of collection cycles and reducing the peak plasma volume of the last cycle. 【Results】 After comparing the two groups, it was found that the incidence of adverse reactions in the observation group and the control group was 16.7%(3/18) and 81.2%(26/32), the proportion of repeated donors in the observation group and the control group was 77.7%(14/18) and 31.2%(10/32). 【Conclusion】 Female platelet donors with low body weight and high platelet count should be given more care during the collection process. It is suggested that giving more times of oral administrations of calcium gluconate by 10% and one more collection cycle to reduce the collection peak in each cycle, as well as the supplement of saline, which can effectively reduce the occurrence of adverse reactions to blood donation, thus improving blood donation satisfaction and increasing the proportion of repeated blood donors.