1.Working practices in eliminating the public health crisis caused by viral hepatitis in Hainan Province of China
Weihua LI ; Changfu XIONG ; Taifan CHEN ; Bin HE ; Dapeng YIN ; Xuexia ZENG ; Feng LIN ; Biyu CHEN ; Xiaomei ZENG ; Biao WU ; Juan JIANG ; Lu ZHONG ; Yuhui ZHANG
Journal of Clinical Hepatology 2025;41(2):228-233
In 2022, Hainan provincial government launched the project for the prevention and control of viral hepatitis with the goals of a hepatitis B screening rate of 90%, a diagnostic rate of 90%, and a treatment rate of 80% among people aged 18 years and above by the year 2025, and the main intervention measures include population-based prevention, case screening, antiviral therapy, and health management. As of December 31, 2024, a total of 6.875 million individuals in the general population had been screened for hepatitis B, with a screening rate of 95.6%. A total of 184 710 individuals with positive HBsAg were identified, among whom 156 772 were diagnosed through serological reexamination, resulting in a diagnostic rate of 84.9%. A total of 50 742 patients with chronic hepatitis B were identified, among whom 42 921 had hepatitis B-specific health records established for health management, with a file establishment rate of 84.6%. A total of 31 553 individuals received antiviral therapy, with a treatment rate of 62.2%. A total of 2.503 million individuals at a high risk of hepatitis C were screened, among whom 4 870 tested positive for HCV antibody and 3 858 underwent HCV RNA testing, resulting in a diagnostic rate of 79.2%, and 1 824 individuals with positive HCV RNA were identified, among whom 1 194 received antiviral therapy, with a treatment rate of 65.5%. In addition, 159 301 individuals with negative HBsAg and anti-HBs and an age of 20 — 40 years were inoculated with hepatitis B vaccine free of charge. Through the implementation of the project for the prevention and control of viral hepatitis, a large number of hepatitis patients have been identified, treated, and managed in the province within a short period of time, which significantly accelerates the efforts to eliminate the crisis of viral hepatitis.
2.Therapeutic role of miR-26a on cardiorenal injury in a mice model of angiotensin-II induced chronic kidney disease through inhibition of LIMS1/ILK pathway.
Weijie NI ; Yajie ZHAO ; Jinxin SHEN ; Qing YIN ; Yao WANG ; Zuolin LI ; Taotao TANG ; Yi WEN ; Yilin ZHANG ; Wei JIANG ; Liangyunzi JIANG ; Jinxuan WEI ; Weihua GAN ; Aiqing ZHANG ; Xiaoyu ZHOU ; Bin WANG ; Bi-Cheng LIU
Chinese Medical Journal 2025;138(2):193-204
BACKGROUND:
Chronic kidney disease (CKD) is associated with common pathophysiological processes, such as inflammation and fibrosis, in both the heart and the kidney. However, the underlying molecular mechanisms that drive these processes are not yet fully understood. Therefore, this study focused on the molecular mechanism of heart and kidney injury in CKD.
METHODS:
We generated an microRNA (miR)-26a knockout (KO) mouse model to investigate the role of miR-26a in angiotensin (Ang)-II-induced cardiac and renal injury. We performed Ang-II modeling in wild type (WT) mice and miR-26a KO mice, with six mice in each group. In addition, Ang-II-treated AC16 cells and HK2 cells were used as in vitro models of cardiac and renal injury in the context of CKD. Histological staining, immunohistochemistry, quantitative real-time polymerase chain reaction (PCR), and Western blotting were applied to study the regulation of miR-26a on Ang-II-induced cardiac and renal injury. Immunofluorescence reporter assays were used to detect downstream genes of miR-26a, and immunoprecipitation was employed to identify the interacting protein of LIM and senescent cell antigen-like domain 1 (LIMS1). We also used an adeno-associated virus (AAV) to supplement LIMS1 and explored the specific regulatory mechanism of miR-26a on Ang-II-induced cardiac and renal injury. Dunnett's multiple comparison and t -test were used to analyze the data.
RESULTS:
Compared with the control mice, miR-26a expression was significantly downregulated in both the kidney and the heart after Ang-II infusion. Our study identified LIMS1 as a novel target gene of miR-26a in both heart and kidney tissues. Downregulation of miR-26a activated the LIMS1/integrin-linked kinase (ILK) signaling pathway in the heart and kidney, which represents a common molecular mechanism underlying inflammation and fibrosis in heart and kidney tissues during CKD. Furthermore, knockout of miR-26a worsened inflammation and fibrosis in the heart and kidney by inhibiting the LIMS1/ILK signaling pathway; on the contrary, supplementation with exogenous miR-26a reversed all these changes.
CONCLUSIONS
Our findings suggest that miR-26a could be a promising therapeutic target for the treatment of cardiorenal injury in CKD. This is attributed to its ability to regulate the LIMS1/ILK signaling pathway, which represents a common molecular mechanism in both heart and kidney tissues.
Animals
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MicroRNAs/metabolism*
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Angiotensin II/toxicity*
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Mice
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Renal Insufficiency, Chronic/chemically induced*
;
Mice, Knockout
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Disease Models, Animal
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Male
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Signal Transduction/genetics*
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LIM Domain Proteins/genetics*
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Mice, Inbred C57BL
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Cell Line
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Humans
3.Programmed death-ligand 1 tumor proportion score in predicting the safety and efficacy of PD-1/PD-L1 antibody-based therapy in patients with advanced non-small cell lung cancer: A retrospective, multicenter, observational study.
Yuequan SHI ; Xiaoyan LIU ; Anwen LIU ; Jian FANG ; Qingwei MENG ; Cuimin DING ; Bin AI ; Yangchun GU ; Cuiying ZHANG ; Chengzhi ZHOU ; Yan WANG ; Yongjie SHUI ; Siyuan YU ; Dongming ZHANG ; Jia LIU ; Haoran ZHANG ; Qing ZHOU ; Xiaoxing GAO ; Minjiang CHEN ; Jing ZHAO ; Wei ZHONG ; Yan XU ; Mengzhao WANG
Chinese Medical Journal 2025;138(14):1730-1740
BACKGROUND:
This study aimed to investigate programmed death-ligand 1 tumor proportion score in predicting the safety and efficacy of PD-1/PD-L1 antibody-based therapy in treating patients with advanced non-small cell lung cancer (NSCLC) in a real-world setting.
METHODS:
This retrospective, multicenter, observational study enrolled adult patients who received PD-1/PD-L1 antibody-based therapy in China and met the following criteria: (1) had pathologically confirmed, unresectable stage III-IV NSCLC; (2) had a baseline PD-L1 tumor proportion score (TPS); and (3) had confirmed efficacy evaluation results after PD-1/PD-L1 treatment. Logistic regression, Kaplan-Meier analysis, and Cox regression were used to assess the progression-free survival (PFS), overall survival (OS), and immune-related adverse events (irAEs) as appropriate.
RESULTS:
A total of 409 patients, 65.0% ( n = 266) with a positive PD-L1 TPS (≥1%) and 32.8% ( n = 134) with PD-L1 TPS ≥50%, were included in this study. Cox regression confirmed that patients with a PD-L1 TPS ≥1% had significantly improved PFS (hazard ratio [HR] 0.747, 95% confidence interval [CI] 0.573-0.975, P = 0.032). A total of 160 (39.1%) patients experienced 206 irAEs, and 27 (6.6%) patients experienced 31 grade 3-5 irAEs. The organs most frequently associated with irAEs were the skin (52/409, 12.7%), thyroid (40/409, 9.8%), and lung (34/409, 8.3%). Multivariate logistic regression revealed that a PD-L1 TPS ≥1% (odds ratio [OR] 1.713, 95% CI 1.054-2.784, P = 0.030) was an independent risk factor for irAEs. Other risk factors for irAEs included pretreatment absolute lymphocyte count >2.5 × 10 9 /L (OR 3.772, 95% CI 1.377-10.329, P = 0.010) and pretreatment absolute eosinophil count >0.2 × 10 9 /L (OR 2.006, 95% CI 1.219-3.302, P = 0.006). Moreover, patients who developed irAEs demonstrated improved PFS (13.7 months vs. 8.4 months, P <0.001) and OS (28.0 months vs. 18.0 months, P = 0.007) compared with patients without irAEs.
CONCLUSIONS
A positive PD-L1 TPS (≥1%) was associated with improved PFS and an increased risk of irAEs in a real-world setting. The onset of irAEs was associated with improved PFS and OS in patients with advanced NSCLC receiving PD-1/PD-L1-based therapy.
Humans
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Carcinoma, Non-Small-Cell Lung/metabolism*
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Male
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Female
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Retrospective Studies
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Middle Aged
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Lung Neoplasms/metabolism*
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Aged
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B7-H1 Antigen/metabolism*
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Programmed Cell Death 1 Receptor/metabolism*
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Adult
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Aged, 80 and over
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Immune Checkpoint Inhibitors/therapeutic use*
4.Effect of total secondary ginsenosides on apoptosis and energy metabolism of H9c2 cells under hypoxia based on mitochondrial biogenesis.
Zhong-Jie YUAN ; Yue XIAO ; Zhen LIU ; Ai-Qun ZHANG ; Bin LI ; Shang-Xian GAO
China Journal of Chinese Materia Medica 2025;50(5):1255-1266
This study explores the effect of total secondary ginsenosides(TSG) on apoptosis and energy metabolism in H9c2 cells under hypoxia and its potential mechanisms. H9c2 cell viability was observed and the apoptosis rate was calculated to determine suitable intervention concentrations of TSG, antimycin A complex(AMA), and coenzyme Q10(CoQ10), along with the duration of hypoxia. H9c2 cells at the logarithmic phase were divided into a normal group, a model group, a TSG group, an AMA group, a TSG+AMA group, and a CoQ10 group. All groups, except the normal group, were treated with their respective intervention drugs and cultured under hypoxic conditions. Adenosine triphosphate(ATP) content and creatine kinase(CK) activity were measured using an ATP chemiluminescence assay kit and a CK colorimetric assay kit. Flow cytometry was used to assess apoptosis rates, and Western blot evaluated the expression levels of apoptosis-related proteins, including B-cell lymphoma 2(Bcl-2), Bcl-2-associated X protein(Bax), cysteinyl aspartate-specific protease(caspase)-3, caspase-8, and caspase-9, as well as mitochondrial biogenesis-related proteins peroxisome proliferator-activated receptor-γ coactivator 1α(PGC-1α), estrogen-related receptor-α(ERRα), nuclear respiratory factor(NRF)-1, NRF-2, peroxisome proliferator activated receptor-α(PPARα), and Na~+-K~+-ATPase. RT-PCR was employed to analyze the mRNA expression of mitochondrial biogenesis factors, including PGC-1α, ERRα, NRF-1, NRF-2, PPARα, mitochondrial transcription factor A(TFAM), mitochondrial cytochrome C oxidase 1(COX1), and mitochondrial NADH dehydrogenase subunit 1(ND1), ND2. The selected intervention concentrations were 7.5 μg·mL~(-1) for TSG, 10 μmol·L~(-1) for AMA, and 1×10~(-4) mol·L~(-1) for CoQ10, with a hypoxia duration of 6 h. Compared with the normal group, the model group showed decreased ATP content and CK activity, increased apoptosis rates, decreased Bcl-2 expression, and increased Bax, caspase-3, caspase-8, and caspase-9 expression in H9c2 cells. Additionally, the protein and mRNA expression levels of mitochondrial biogenesis-related factors(PGC-1α, ERRα, NRF-1, NRF-2, PPARα), mRNA expression of TFAM, COX1, and ND1, ND2, and protein expression of Na~+-K~+-ATPase in mitochondrial DNA, were also reduced. In the TSG and CoQ10 groups, ATP content and CK activity increased, and apoptosis rates decreased compared with those in the model group. The TSG group showed decreased protein expression of apoptosis-related proteins Bax, caspase-3, caspase-8, and caspase-9, increased protein and mRNA expression of mitochondrial biogenesis factors PGC-1α, ERRα, NRF-1, and PPARα, and increased NRF-2 protein expression and TFAM mRNA expression in mitochondrial DNA. Conversely, in the AMA group, ATP content and CK activity decreased, the apoptosis rate increased, Bcl-2 expression decreased, and Bax, caspase-3, caspase-8, and caspase-9 expression increased, alongside reductions in PGC-1α, ERRα, NRF-1, NRF-2, PPARα protein and mRNA expression, as well as TFAM, COX1, ND1, ND2 mRNA expression and Na~+-K~+-ATPase protein expression. Compared with the TSG group, the TSG+AMA group exhibited decreased ATP content and CK activity, increased apoptosis rates, decreased Bcl-2 expression, and increased Bax, caspase-3, caspase-8, and caspase-9 expression, along with decreased PGC-1α, ERRα, NRF-1, NRF-2, and PPARα protein and mRNA expression and TFAM, COX1, and ND1, ND2 mRNA expression. Compared with the AMA group, the TSG+AMA group showed increased CK activity, decreased apoptosis rate, increased Bcl-2 expression, and decreased Bax, caspase-8, and caspase-9 expression. Additionally, the protein and mRNA expression of PGC-1α, ERRα, NRF-1, PPARα, mRNA expression of TFAM, COX1, ND1, ND2, and Na~+-K~+-ATPase protein expression increased. In conclusion, TSG enhance ATP content and CK activity and inhibit apoptosis in H9c2 cells under hypoxia, and the mechanisms may be related to the regulation of PGC-1α, ERRα, NRF-1, NRF-2, PPARα, and TFAM expression, thus promoting mitochondrial biogenesis.
Apoptosis/drug effects*
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Ginsenosides/pharmacology*
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Energy Metabolism/drug effects*
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Mitochondria/metabolism*
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Animals
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Rats
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Cell Line
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Cell Hypoxia/drug effects*
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Organelle Biogenesis
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Adenosine Triphosphate/metabolism*
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Humans
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Cell Survival/drug effects*
5.Correlation of IGF2 levels with sperm quality, inflammation, and DNA damage in infertile patients.
Jing-Gen WU ; Cai-Ping ZHOU ; Wei-Wei GUI ; Zhong-Yan LIANG ; Feng-Bin ZHANG ; Ying-Ge FU ; Rui LI ; Fang WU ; Xi-Hua LIN
Asian Journal of Andrology 2025;27(2):204-210
Insulin-like growth factor 2 (IGF2) is a critical endocrine mediator implicated in male reproductive physiology. To investigate the correlation between IGF2 protein levels and various aspects of male infertility, specifically focusing on sperm quality, inflammation, and DNA damage, a cohort of 320 male participants was recruited from the Women's Hospital, Zhejiang University School of Medicine (Hangzhou, China) between 1 st January 2024 and 1 st March 2024. The relationship between IGF2 protein concentrations and sperm parameters was assessed, and Spearman correlation and linear regression analysis were employed to evaluate the independent associations between IGF2 protein levels and risk factors for infertility. Enzyme-linked immunosorbent assay (ELISA) was used to measure IGF2 protein levels in seminal plasma, alongside markers of inflammation (tumor necrosis factor-alpha [TNF-α] and interleukin-1β [IL-1β]). The relationship between seminal plasma IGF2 protein levels and DNA damage marker phosphorylated histone H2AX (γ-H2AX) was also explored. Our findings reveal that IGF2 protein expression decreased notably in patients with asthenospermia and teratospermia. Correlation analysis revealed nuanced associations between IGF2 protein levels and specific sperm parameters, and low IGF2 protein concentrations correlated with increased inflammation and DNA damage in sperm. The observed correlations between IGF2 protein levels and specific sperm parameters, along with its connection to inflammation and DNA damage, underscore the importance of IGF2 in the broader context of male reproductive health. These findings lay the groundwork for future research and potential therapeutic interventions targeting IGF2-related pathways to enhance male fertility.
Humans
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Male
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Insulin-Like Growth Factor II/metabolism*
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Infertility, Male/genetics*
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DNA Damage
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Adult
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Inflammation/metabolism*
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Spermatozoa/metabolism*
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Semen Analysis
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Semen/metabolism*
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Tumor Necrosis Factor-alpha/metabolism*
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Histones/metabolism*
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Interleukin-1beta/metabolism*
6.Strychni Semen and its active compounds promote axon regeneration following peripheral nerve injury by suppressing myeloperoxidase in the dorsal root ganglia.
Yan ZHANG ; Xin-Yue ZHAO ; Meng-Ting LIU ; Zhu-Chen ZHOU ; Hui-Bin CHENG ; Xu-Hong JIANG ; Yan-Rong ZHENG ; Zhong CHEN
Journal of Integrative Medicine 2025;23(2):169-181
OBJECTIVE:
Treating peripheral nerve injury (PNI) presents a clinical challenge due to limited axon regeneration. Strychni Semen, a traditional Chinese medicine, is clinically used for numbness and hemiplegia. However, its role in promoting functional recovery after PNI and the related mechanisms have not yet been systematically studied.
METHODS:
A mouse model of sciatic nerve crush (SNC) injury was established and the mice received drug treatment via intragastric gavage, followed by behavioral assessments (adhesive removal test, hot-plate test and Von Frey test). Transcriptomic analyses were performed to examine gene expression in the dorsal root ganglia (DRGs) from the third to the sixth lumbar vertebrae, so as to identify the significantly differentially expressed genes. Immunofluorescence staining was used to assess the expression levels of superior cervical ganglia neural-specific 10 protein (SCG10). The ultra-trace protein detection technique was used to evaluate changes in gene expression levels.
RESULTS:
Strychni Semen and its active compounds (brucine and strychnine) improved functional recovery in mice following SNC injury. Transcriptomic data indicated that Strychni Semen and its active compounds initiated transcriptional reprogramming that impacted cellular morphology and extracellular matrix remodeling in DRGs after SNC, suggesting potential roles in promoting axon regeneration. Imaging data further confirmed that Strychni Semen and its active compounds facilitated axon regrowth in SNC-injured mice. By integrating protein-protein interaction predictions, ultra-trace protein detection, and molecular docking analysis, we identified myeloperoxidase as a potentially critical factor in the axon regenerative effects conferred by Strychni Semen and its active compounds.
CONCLUSION
Strychni Semen and its active compounds enhance sensory function by promoting axonal regeneration after PNI. These findings establish a foundation for the future applications of Strychni Semen and highlight novel therapeutic strategies and drug targets for axon regeneration. Please cite this article as: Zhang Y, Zhao XY, Liu MT, Zhou ZC, Cheng HB, Jiang XH, Zheng YR, Chen Z. Strychni Semen and its active compounds promote axon regeneration following peripheral nerve injury by suppressing myeloperoxidase in the dorsal root ganglia. J Integr Med. 2025; 23(2): 169-181.
Animals
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Nerve Regeneration/drug effects*
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Mice
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Peripheral Nerve Injuries/physiopathology*
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Male
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Ganglia, Spinal/enzymology*
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Axons/physiology*
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Peroxidase/antagonists & inhibitors*
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Mice, Inbred C57BL
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Drugs, Chinese Herbal/pharmacology*
;
Disease Models, Animal
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Strychnine/pharmacology*
7.Clinical trial of brexpiprazole in the treatment of adults with acute schizophrenia
Shu-Zhe ZHOU ; Liang LI ; Dong YANG ; Jin-Guo ZHAI ; Tao JIANG ; Yu-Zhong SHI ; Bin WU ; Xiang-Ping WU ; Ke-Qing LI ; Tie-Bang LIU ; Jie LI ; Shi-You TANG ; Li-Li WANG ; Xue-Yi WANG ; Yun-Long TAN ; Qi LIU ; Uki MOTOMICHI ; Ming-Ji XIAN ; Hong-Yan ZHANG
The Chinese Journal of Clinical Pharmacology 2024;40(5):654-658
Objective To evaluate the efficacy and safety of brexpiprazole in treating acute schizophrenia.Methods Patients with schizophrenia were randomly divided into treatment group and control group.The treatment group was given brexpiprozole 2-4 mg·d-1 orally and the control group was given aripiprazole 10-20 mg·d-1orally,both were treated for 6 weeks.Clinical efficacy of the two groups,the response rate at endpoint,the changes from baseline to endpoint of Positive and Negative Syndrome Scale(PANSS),Clinical Global Impression-Improvement(CGI-S),Personal and Social Performance scale(PSP),PANSS Positive syndrome subscale,PANSS negative syndrome subscale were compared.The incidence of treatment-related adverse events in two groups were compared.Results There were 184 patients in treatment group and 186 patients in control group.After treatment,the response rates of treatment group and control group were 79.50%(140 cases/184 cases)and 82.40%(150 cases/186 cases),the scores of CGI-I of treatment group and control group were(2.00±1.20)and(1.90±1.01),with no significant difference(all P>0.05).From baseline to Week 6,the mean change of PANSS total score wese(-30.70±16.96)points in treatment group and(-32.20±17.00)points in control group,with no significant difference(P>0.05).The changes of CGI-S scores in treatment group and control group were(-2.00±1.27)and(-1.90±1.22)points,PSP scores were(18.80±14.77)and(19.20±14.55)points,PANSS positive syndrome scores were(-10.30±5.93)and(-10.80±5.81)points,PANSS negative syndrome scores were(-6.80±5.98)and(-7.30±5.15)points,with no significant difference(P>0.05).There was no significant difference in the incidence of treatment-related adverse events between the two group(69.00%vs.64.50%,P>0.05).Conclusion The non-inferiority of Brexpiprazole to aripiprazole was established,with comparable efficacy and acceptability.
8.Advances in the Study of Cerebrocardiac Syndrome and Its Forensic Significance
Jian-Feng WANG ; Chen-Teng YANG ; Guo-Zhong ZHANG ; Bin CONG
Journal of Forensic Medicine 2024;40(4):372-378
Cerebrocardiac syndrome refers to secondary cardiac damage caused by various craniocere-bral injury lesions,which can exacerbate existing heart disease.In the practice of forensic pathology,cerebral-cardiac interaction is often ignored in cases of death with a short time after craniocerebral in-jury,especially those with underlying heart disease.This article reviews the pathogenesis of cerebrocar-diac syndrome by summarizing recent research results of cerebrocardiac syndrome at home and abroad and discusses its significance in the field of forensic medicine.The aim is to provide assistance for fo-rensic medicine practice of cerebrocardiac syndrome.
9.Effects of Yishen Huayu Xugu prescription combined with Dixumab on IL-6,β-CTX and bone mineral density in elderly patients operated for osteoporotic lumbar vertebral compression fractures
Bin ZHANG ; Wei HU ; Rongzhen TAN ; Panpan YANG ; Jun HU ; Zhong YUAN ; Gongtao JIANG
The Journal of Practical Medicine 2024;40(19):2766-2771
Objective To investigate the application value of Yishen Huayu Xugu prescriptionin the man-agement of osteoporotic lumbar compression fracture among elderly patients.Methods From March 2022 to August 2023,all elderly patients with osteoporotic lumbar compression fractures were enrolled in our hospital and randomly assigned into two groups.The patients were diagnosed with kidney deficiency and blood stasis syndrome through physical identification.After admission,both groups(85 cases each)underwent percutaneous kyphoplasty.The control group received conventional Western medicine treatment post-surgery,while the observation group was administered Yishen Huayu Xugu prescription.This herbal formula was prepared by decocting 300 mL of juice in water,divided into two doses,and taken warmly after breakfast and dinner for a duration of 12 weeks.Therapeutic effects were compared after completion of the 12-week treatment period.Results After treatment,the serum levels of D-dimer(D-dimer,D-D)were(5.02±0.63),interleukin-17(IL-17)was(53.68±5.47),β-collagen special sequence(β-CTX)was(0.37±0.06,interleukin-6(IL-6)was(69.38±8.27)compared to the control group;bone morphogenetic protein-2(BMP-2)was(2.69±0.31),25-hydroxyvitamin D was(58.93±7.17),and vascular endo-thelial growth factor(VEGF)was(309.81±51.49)which were higher than those in the control group with more sig-nificant improvement observed in the intervention group(P<0.05).Bone mineral density(BMD)increased at both week 6 and week12 after treatment with a more pronounced improvement seen in the intervention group(P<0.05).After treatment,the observation group exhibited a more significant reduction in the total Traditional Chinese Medicine(TCM)symptom score,Cobb Angle,and ODI,compared to the control group(P<0.05).Furthermore,the observation group demonstrated a higher total effective rate of 95.29%(81/85)compared to 85.88%(73/85)in the con-trol group after treatment,with a statistically significant difference between the two groups(P<0.05).Conclusion The Yishen Huayu Xugu prescription holds significant positive implications for this particular medication,as it ex-hibits enhanced efficacy in reducing inflammation,regulating bone metabolism,improving lumbar function,promot-ing disease amelioration,and enhancing clinical outcomes.
10.Effects of Medial Protrusio Technique of Total Hip Arthroplasty on Acetabular Cup in Adult Patient with Developmental Dysplasia of the Hip:A Finite Element Analysis
Xin ZHANG ; Wenjie LIN ; Bin HE ; Bolin FENG ; Haicong CHEN ; Huan ZHONG ; Hanbin OUYANG
Journal of Medical Biomechanics 2024;39(3):421-427
Objective To investigate the biomechanical effects of the medial protrusio technique on the acetabular cup in adult patients with developmental hip(DDH)after total hip arthroplasty.Methods The CT scanning data of bilateral hips from an adult patient with unilateral DDH were obtained further to develop a finite element model of the affected hemipelvis.The medial protrusio technique with various levels of medial protrusio was simulated,and the biomechanical differences between the medial protrusio and non-protrusio groups were evaluated.Results In the simulated pull-out test,the maximum anti-pull-out load strength of the non-protrusio group was 1 166 N.Compared with the non-protrusio group,the anti-pull-out load strength of the 4 mm and 8 mm medial protrusio groups increased by 45.8%and 57.1%,respectively.The peak micromotion at the cup-bone interface for the non-protrusio group was 166.4 μm in the standing phase of the gait cycle,and that of the 4 mm and 8 mm medial protrusio groups was decreased by 46.2%and 62.1%,respectively.Regarding the immediate stress distributions of periacetabular bone tissues following cup implantation,the differences between the groups were not significant.Under the loading condition of the standing phase,the non-protrusio group yielded the lowest average and peak stresses.The average stress increased with the level of medial protrusio,and the highest peak stress was observed in the 4 mm medial protrusio group.Conclusions The medial protrusio technique can improve the initial stability of the acetabular cup,and the initial stability is positively proportional to the protrusio level.However,owing to the concentration of marginal stress at the cup-bone interface,a minor medial protrusio cup with insufficient bone coverage might increase the risk of various prosthesis-related complications.

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