Brain’s neural activities encompass both periodic rhythmic oscillations and aperiodic neural fluctuations. Rhythmic oscillations manifest as spectral peaks of neural signals, directly reflecting the synchronized activities of neural populations and closely tied to cognitive and behavioral states. In contrast, aperiodic fluctuations exhibit a power-law decaying spectral trend, revealing the multiscale dynamics of brain neural activity. In recent years, researchers have made notable progress in studying brain aperiodic dynamics. These studies demonstrate that aperiodic activity holds significant physiological relevance, correlating with various physiological states such as external stimuli, drug induction, sleep states, and aging. Aperiodic activity serves as a reflection of the brain’s sensory capacity, consciousness level, and cognitive ability. In clinical research, the aperiodic exponent has emerged as a significant potential biomarker, capable of reflecting the progression and trends of brain diseases while being intricately intertwined with the excitation-inhibition balance of neural system. The physiological mechanisms underlying aperiodic dynamics span multiple neural scales, with activities at the levels of individual neurons, neuronal ensembles, and neural networks collectively influencing the frequency, oscillatory patterns, and spatiotemporal characteristics of aperiodic signals. Aperiodic dynamics currently boasts broad application prospects. It not only provides a novel perspective for investigating brain neural dynamics but also holds immense potential as a neural marker in neuromodulation or brain-computer interface technologies. This paper summarizes methods for extracting characteristic parameters of aperiodic activity, analyzes its physiological relevance and potential as a biomarker in brain diseases, summarizes its physiological mechanisms, and based on these findings, elaborates on the research prospects of aperiodic dynamics.

AIM To analyze the component composition of Xeriga-4 Powder,and to determine the contents of phellodendrine,chlorogenic acid,gardenoside,berberine,rutin and curcumin.METHODS The high performance liquid chromatography-Q-exactive orbitrap mass spectrometry(HPLC-Q-Exactive-MS)qualitative analysis was performed on a 35℃thermostatic Agilent ZORBAX SB-Aq column(4.6 mm×150 mm,5 μm),with the mobile phase comprising of methanol-0.1%formic acid flowing at 0.35 mL/min in a gradient elution manner,and electron spray ionization source was adopted in positive and negative ion scanning.High performance liquid chromatography tandem mass spectrometry(HPLC-MS/MS)quantitative analysis was performed on a 35℃thermostatic Shim-pack GIST-HP C18 column(2.1 mm×100 mm,3 μm),with the mobile phase comprising of methanol-0.1%formic acid flowing at 0.25 mL/min in a gradient elution manner,and electron spray ionization source was adopted in positive and negative ion scanning with multiple reaction monitoring mode.RESULTS Total 65 constituents were identified,containing 19 alkaloids,13 organic acids,13 flavonoids,7 curcumins,6 iridoids,4 fatty acids,2 aldehydes,and 1 amino acid.Six constituents showed good linear relationships within their own ranges(r≥0.999 1),whose average recoveries were 96.44%-102.37%with the RSDs of 2.05%-3.74%.CONCLUSION This study can provide a reference for the quality control for Xieriga-4 Powder.

italic>Platycodon grandiflorum (Jacq.) A. DC is one of the most commonly used bulk medicinal herbs. It has important value in the fields of medicine, food and cosmetics, and its market demand is increasing year by year, and it has a good development prospect. In this study, based on 403 distribution records and 8 environmental variables, we used Maxent model to predict the potential distribution of P. grandiflorum under climate change. The results showed that the model simulation effect was the best when the Maxent parameter was FC (feature combination) = LQPH (L: linear features; Q: quadratic features; P: product features; H: hinge features) and RM (regularization multiplier) = 2.1, AUC (area under curve) = 0.901, and the model prediction showed that P. grandiflorum was widely distributed in 28 provinces of China under the current climate conditions, with a suitable area of 2 337 419.98 km². Under the influence of climate change in the future, the area of suitable habitat of P. grandiflorum showed a decreasing trend, and the distribution center as a whole showed a trend of northward and eastward shift. The distribution area of P. grandiflorum in the three main producing areas is affected by climate change, and the overall trend is that the future suitable distribution area of Chifeng in Inner Mongolia increases, while the future suitable distribution area of Zibo in Shandong and Taihe, Bozhou in Anhui decreases or even disappears under the SSP5-8.5 scenario (shared socioeconomic pathways). It is suggested to maintain and protect the ecological environment and germplasm resources of the reserved area suitable for the growth of P. grandiflorum, and increase the cultivation research in the expansion area of P. grandiflorum, so as to lay a foundation for the subsequent expansion of P. grandiflorum planting and to promote the protection and sustainable development of P. grandiflorum resources.

Objective:To investigate the clinical features and influencing factors of prognosis in elderly patients with heart failure(HF)in ICU.Methods:Clinical data of 148 elderly HF patients(≥60 years old)admitted to ICU of our hospital from January to December 2021 were retrospectively analyzed.Disease history,etiology and related ex-amination data were analyzed in these patients,and predisposing factors and clinical features of HF were summa-rized.According to incidence of adverse cardiovascular events within 6 months,they were divided into event group(n=70)and no event group(n=78).General clinical data were compared between two groups.Univariate and multivariate Logistic regression were used to analyze influencing factors of poor prognosis in elderly HF patients in ICU.Results:Predisposing factors of elderly HF mainly included upper respiratory tract infections and pneumonia 34 cases(22.97％),20 cases(13.51％)of rapid atrial fibrillation and fatigue respectively.There were 91 cases(61.49％)with typical cardiac insufficiency as initial symptom;24 cases(16.22％)complicated with neuropsychiatric symptom;44 cases(29.73％)complicated with anxiety and depression of different extent.Univariate and multivariate Logistic regression a-nalysis indicated that age,NYHA class Ⅲ～Ⅳ,Acute Physiology and Chronic Health Evaluation Ⅱ(APACHE Ⅱ)score,N terminal pro brain natriuretic peptide(NT-proBNP),growth differentiation factor 15(GDF-15)and high sensitive C reactive protein(hsCRP)levels were independent risk factors for poor prognosis in elderly HF patients(OR=1.021～1.393,P＜0.05 or＜0.01).Conclusion:For elderly HF patients in ICU,clinical manifestations are not typical,and the predisposing factors are complex.It is found that APACHE Ⅱ score,GDF-15,hsCRP and NT-proBNP levels possess important significance for diagnosis and prognosis of these patients.

Objective To evaluate the efficacy and safety of Chinese patent medicine combined with inhalation therapy for bronchial asthma in children with network meta-analysis.Methods CNKI,CBM,Wanfang Data,VIP,Embase,PubMed,and Web of Science were searched for obtaining the clinical randomized controlled trials of Chinese patent medicine combined with inhalation therapy for the treatment of bronchial asthma in children.Stata14 was used for network meta-analysis of the data.Results A total of 28 studies were eventually included,involving seven kinds of Chinese patent medicines,namely Hanchuan Zupa Granules,Huaiqihuang Granules,Tanreqing Injection,Xiaoer Feire Kechuan Granules,Chuankezhi Injection,Yupingfeng Granules and Zhubei Dingchuan Pills.The results of network meta-analysis showed that for improving the total effective rate,Tanreqing Injection combined with inhalation therapy,Chuankezhi Injection combined with inhalation therapy,and Zhubei Dingchuan Pills combined with inhalation therapy had the top 3 rankings of surface under the cumulative ranking curve(SUCRA).The optimal intervention measures to improve the peak expiratory flow(PEF),forced expiratory volume at one second(FEV1),and the ratio of FEV1 to forced vital capacity(FEV1/FVC)may separately be Tanreqing Injection combined with inhalation therapy,Hanchuan Zupa Granules combined with inhalation therapy,and Zhubei Dingchuan Pills combined with inhalation therapy.The analysis of the SUCRA ranking of the incidence of adverse reactions showed that Xiaoer Feire Kechuan Granules combined with inhalation therapy may be the intervention with the least side effects,and Zhubei Dingchuan Pills combined with inhalation therapy may be the intervention with greater side effects.Conclusion Compared with inhalation therapy alone,Chinese patent medicine combined with inhalation therapy can enhance the effective rate of bronchial asthma in children and improve lung function indicators,and has good safety.

Objective To investigate the relationship between single nucleotide polymorphisms(SNPs)in the eNOS gene and genetic susceptibility to systemic lupus erythematosus(SLE)in Hainan.Methods Blood samples were collected from SLE patients(SLE group,n=214)and healthy controls(control group,n=214)from January 2020 to December 2022 at the First Affiliated Hospital of Hainan Medical College and Hainan Provincial People's Hospital.The bases of eNOS gene rs3918188,rs1799983 and rs1007311 loci in each group were detected by SNaPshot sequencing technology.Logistic regression was used to analyze the correlation between genotypes,alleles and gene models(dominant model,recessive model,and overdominant model)of the above 3 target loci of the eNOS gene and genetic susceptibility to SLE.Haplotype analysis was conducted using HaploView 4.2 software to investigate the relationship between haploid and genetic susceptibility to SLE at each site.Results The results of logistic regression analysis revealed that the CC genotype and the C allele at rs3918188 locus were risk factors for genetic susceptibility to SLE(CC vs.AA:OR=2.449,P<0.05;C vs.A:OR=2.133,P<0.001).In recessive model at rs3918188 locus,CC genotype carriers had an increased risk of SLE development compared with AA+AC genotype carriers(OR=2.774,P<0.001).In contrast,in overdominant model at this locus,AC genotype carriers had a decreased risk of SLE occurrence compared with AA+CC genotype carriers(OR=0.385,P<0.001).In addition,polymorphisms of rs1799983 and rs1007311 were not associated with susceptibility to SLE in genotype,allele type and the 3 genetic models(P>0.05).Haplotype analysis revealed a strong linkage disequilibrium between the rs1007311 and rs1799983 loci of the eNOS gene,but no significant correlation was found between haplotype and genetic susceptibility to SLE(P>0.05).Conclusion The CC genotype and C allele at rs3918188 locus of eNOS gene may be risk factors for SLE in Hainan,while the risk of SLE occurrence is reduced in carriers of AC genotype under the overdominant model.

Objective To investigate the risk factors for bronchopulmonary dysplasia(BPD)in twin preterm infants with a gestational age of<34 weeks,and to provide a basis for early identification of BPD in twin preterm infants in clinical practice.Methods A retrospective analysis was performed for the twin preterm infants with a gestational age of<34 weeks who were admitted to 22 hospitals nationwide from January 2018 to December 2020.According to their conditions,they were divided into group A(both twins had BPD),group B(only one twin had BPD),and group C(neither twin had BPD).The risk factors for BPD in twin preterm infants were analyzed.Further analysis was conducted on group B to investigate the postnatal risk factors for BPD within twins.Results A total of 904 pairs of twins with a gestational age of<34 weeks were included in this study.The multivariate logistic regression analysis showed that compared with group C,birth weight discordance of>25%between the twins was an independent risk factor for BPD in one of the twins(OR=3.370,95%CI:1.500-7.568,P<0.05),and high gestational age at birth was a protective factor against BPD(P<0.05).The conditional logistic regression analysis of group B showed that small-for-gestational-age(SGA)birth was an independent risk factor for BPD in individual twins(OR=5.017,95%CI:1.040-24.190,P<0.05).Conclusions The development of BPD in twin preterm infants is associated with gestational age,birth weight discordance between the twins,and SGA birth.

Objective To compare the efficacy of single-port laparoscopic unilateral salpingectomy and adnexectomy(ovary+fallopian tube)via different approaches,and to explore the safety and feasibility of single-port single-handed laparoscopy without access platform.Methods A total of 94 patients who underwent unilateral salpingectomy and 78 patients who underwent unilateral adnexectomy in our hospital from August 2021 to November 2022 were selected and randomly divided into the single-port single-handed without access platform group,the single-port double-handed without access platform group,and the single-port with access platform group,respectively.The operation time,intraoperative blood loss,postoperative morbidity,postoperative anal exhaust time,postoperative hospitalization time,total hospitalization cost,incision length,postoperative pain visual analogue scale(VAS)score,surgical complications,postoperative body image scale(BIS),and cosmetic score(CS)of patients in the three groups were observed and compared.Results There was no statistically significant difference in operative time,intraoperative blood loss,postoperative morbidity,postoperative anal exhaust time,postoperative hospitalization time,and surgical complications among the three groups(P>0.05).There were statistically significant differences in total hospitalization cost,incision length,postoperative VAS score,postoperative BIS score,and postoperative CS among the three groups(P<0.05).Conclusion Single-port single-handed laparoscopy salpingectomy and adnexectomy without access platform is a safe and feasible surgical method,which has the advantages of smaller incision,less hospitalization cost,and higher incision satisfaction than single-port surgery with access platform and single-port double-handed laparoscopic surgery without access platform.

The establishment and maintenance of latent cellular reservoirs of human immunodeficiency virus(HIV)within days after infection remains a major obstacle to achieving functional HIV cure.Epigenetics pertains to the regulation of gene ex-pression through means beyond mutations in DNA sequences.Research on epigenetic modifications in recent decades has facili-tated in-depth understanding of HIV pathogenesis and ongoing AIDS therapy strategies.This review briefly introduces princi-ples of epigenetics,and summarizes current epigenetic findings observed during HIV infection,particularly regarding the roles of epigenetic mechanisms including DNA methylation,histone modification,RNA modification,and non-coding RNAs in the processes of viral latency and formation of reservoirs.In addition,the implications and challenges of these epigenetic regulatory mechanisms in functional AIDS cure strategies are discussed.This review is aimed at encouraging more research groups to focus on epigenetic studies in HIV-infected populations,to develop more therapeutic drugs based on epigenetics,and to propose more rational and feasible functional AIDS cure strategies.

Objective:To explore the optimal storage condition and time of umbilical cord blood from collection to preparation.Methods:Collect cord blood samples from 30 healthy newborns,with each new born's umbilical cord blood was divided into two parts on average.One part was stored in cold storage(4 ℃)and the other was stored at room temperature(20-24 ℃).Samples were taken at 24,36,48,60 and 72 h,respectively,total nucleated cells(TNC)count and TNC viability was analyzed.Flow cytometry was used to detect the ratio of viable CD34+cells to viable CD45+cells and viability of CD34+cells,and colony-forming unit-granulocyte-macrophage(CFU-GM)count was performed by hematopoietic progenitor cell colony culture.The change trend of each index over time was observed,and the differences in each index was compared between cold storage and room temperature storage under the same storage time.Results:The TNC count(r4℃=-0.9588,r20-24℃=-0.9790),TNC viability(r4℃=-0.9941,r20 24 ℃=-0.9970),CD34+cells viability(r4℃=-0.9932,r20-24℃=-0.9828)of cord blood stored in cold storage(4 ℃)and room temperature storage(20-24 ℃)showed a consistent downward trend with the prolongation of storage time.The percentage of viable CD34+cells(r4℃=0.9169,r20-24 ℃=0.7470)and CFU-GM count(r4℃=-0.2537,r20-24℃=-0.8098)did not show consistent trends.When the storage time was the same,the TNC count,TNC viability,CD34+cells viability and CFU-GM count of cord blood stored in cold storage were higher than those stored at room temperature.Under the same storage time(24,36,48,60 or 72 h),TNC viability in room temperature storage was significantly lower than that in cold storage(P＜0.001),but TNC count,percentage of viable CD34+cells and CFU-GM count were not significantly different between room temperature storage and cold storage.When stored at room temperature for 24 h and 36 h,the viability of CD34+cells was significantly lower than that in cold storage(P＜0.001,P＜0.01),when the storage time for 48,60 and 72 h,there was no significant difference in the CD34+cells viability between room temperature storage and cold storage.Conclusion:It is recommended that cord blood be stored in cold storage(4 ℃)from collection to preparation,and processed as soon as possible.