Loading...

Current Issue

, Volume 51 Issue 1 Previous Issue    Next Issue
Research on prediction of daily admissions of respiratory diseases with comorbid diabetes in Beijing based on long short-term memory recurrent neural network
ZHU Qian,ZHANG Meng,HU Yaoyu,XU Xiaolin,TAO Lixin,ZHANG Jie,LUO Yanxia,GUO Xiuhua,LIU Xiangtong
J Zhejiang Univ (Med Sci), 2022, 51(1): 1-9.   https://doi.org/10.3724/zdxbyxb-2021-0227
Abstract( 11 )   HTML( 4 )     PDF(4907KB)( 2 )

Objective: To compare the performance of generalized additive model (GAM) and long short-term memory recurrent neural network (LSTM-RNN) on the prediction of daily admissions of respiratory diseases with comorbid diabetes. Methods: Daily data on air pollutants, meteorological factors and hospital admissions for respiratory diseases from Jan 1st, 2014 to Dec 31st, 2019 in Beijing were collected. LSTM-RNN was used to predict the daily admissions of respiratory diseases with comorbid diabetes, and the results were compared with those of GAM. The evaluation indexes were calculated by five-fold cross validation. Results: Compared with the GAM, the prediction errors of LSTM-RNN were significantly lower [root mean squared error (RMSE): 21.21±3.30 vs. 46.13±7.60, P<0.01; mean absolute error (MAE): 14.64±1.99 vs. 36.08±6.20,P<0.01], and theR2 value was significantly higher (0.79±0.06 vs. 0.57±0.12, P<0.01). In gender stratification, RMSE, MAE andR2 values of LSTM-RNN were better than those of GAM in predicting female admission (all P<0.05), but there were no significant difference in predicting male admission between two models (allP>0.05). In seasonal stratification, RMSE and MAE of LSTM-RNN were lower than those of GAM in predicting warm season admission (allP<0.05), but there was no significant difference inR2 value (P>0.05). There were no significant difference in RMSE, MAE andR2 between the two models in predicting cold season admission (all P>0.05). In the stratification of functional areas, the RMSE, MAE andR2 values of LSTM-RNN were better than those of GAM in predicting core area admission (all P<0.05).Conclusion: LSTM-RNN has lower prediction errors and better fitting than the GAM, which can provide scientific basis for precise allocation of medical resources in polluted weather in advance.

Trends and influencing factors of perinatal birth defects in Huai’an from 2008 to 2020
WANG Hui,ZHANG Yue,DING Weijie,ZHU Yi,LU Hongmei,YUE Hongni,DAI Xiaochen,LI Duanhui,ZHU Xiaoqin,XU Xiaolin
J Zhejiang Univ (Med Sci), 2022, 51(1): 10-18.   https://doi.org/10.3724/zdxbyxb-2021-0120
Abstract( 8 )   HTML( 0 )     PDF(3974KB)( 0 )

Objective: To analyze the incidence, trends and related factors of birth defects in Huai’an from 2008 to 2020. Methods: The surveillance data from maternal and child health system of Huai’an from 2008 to 2020 and Huai’an Statistical Yearbook were used for analysis. Taking the annual change percentage and average annual change percentage (AAPC) as the main outcome indicators, the JoinPoint regression analysis was performed to estimate the changing trend of birth defects from 2008 to 2020. Spearman correlation analysis was used to examine the association between birth defects and birth rate, marriage rate, proportion of women with advanced maternal age. Results: During 2008 to 2020, a total of 3414 cases of neonatal birth defects occurred in Huai’an, with an incidence of 4.6‰ (3414/736 608). The rate of perinatal birth defects in Huai’an showed an increasing trend (AAPC=8.8%, t=3.2, P<0.01), and the year of 2016 was a significant changing point. Among 24 types of birth defects, the incidence of congenital heart disease rose and became the most prevalent defect, while the incidence of neural tube malformations such as anencephaly, encephalocele and spina bifida was declined. The incidence of birth defect was negatively correlated with the birth rate (r=–0.751, P<0.01), not correlated with marriage rate (r=–0.516, P>0.05), and positively correlated with the proportion of women with advanced maternal age (r=0.726, P<0.01).Conclusion: The incidence of birth defects in Huai’an shows an increasing trend from 2008 to 2020 with congenital heart disease as the most common type of birth defect, and the increase of birth defects incidence is closely related with the increase of the proportion of women with advanced maternal age.

Influence of perceived stress on health-promoting behaviors in patients with metabolic syndrome: the multiple mediating roles of adaptability and social support
SHAO Jing,CHEN Dandan,ZHANG Hui,WANG Xiyi,WU Jingjie,TANG Leiwen,YE Zhihong
J Zhejiang Univ (Med Sci), 2022, 51(1): 19-26.   https://doi.org/10.3724/zdxbyxb-2021-0377
Abstract( 8 )   HTML( 0 )     PDF(2385KB)( 2 )

Objective: To explore the potential associations between perceived stress and health-promoting behaviors based on the theoretical schema of the middle-range theory of adaptation to chronic illness. Methods: From January to May 2021, a convenience sampling method was used to recruit 230 young and middle-aged patients with metabolic syndrome who underwent physical examination in the inpatient center of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine. The Health-Promoting Health Profile-Ⅱ, Chinese Perceived Stress Scale, Coping and Adaptation Processing Scale-Short Form, and Multi-dimensional Scale of Perceived Social Support were used in the cross-sectional study. The chain mediation effect procedure and bootstrap sampling test were used to examine the mediating role of adaptability and social support between perceived stress and health-promoting behaviors. Results: The mean score of health-promoting behaviors was 100.0±14.6, the mean score of perceived stress was 22.0± 6.9, the mean score of adaptability was 47.0±6.1, and the mean score of social support was 63.8±10.8. Perceived stress had a negative impact on patients’ health-promoting behaviors (r=–0.309, P<0.05). The adaptability (effect size= –0.112, 95%CI:–0.199~–0.038) and social support (effect size= –0.032, 95%CI:–0.083~–0.004) played a mediating role and a chain mediating role in the process of perceived stress influencing patients’ health-promoting behaviors (effect size= –0.045, 95%CI:–0.093~–0.020). Conclusions: Adaptability and social support play an intermediary role between perceived stress and health-promoting behaviors in young and middle-aged patients with metabolic syndrome. Healthcare professionals can motivate patients to develop healthy behaviors by developing intervention strategies on adaptability and social support.

Summary of the best evidence of diet and physical activity management in patients with metabolic syndrome
CHEN Dandan,ZHANG Hui,SHAO Jing,TANG Leiwen,WU Jingjie,YE Zhihong
J Zhejiang Univ (Med Sci), 2022, 51(1): 27-37.   https://doi.org/10.3724/zdxbyxb-2021-0378
Abstract( 12 )   HTML( 3 )     PDF(2348KB)( 2 )

Objective: To evaluate and summarize the evidence of diet and physical activity management in patients with metabolic syndrome (MS). Methods: BMJ Best Practice, UpToDate, Joanna Briggs Institute (JBI) database, Agency for Healthcare Research and Quality (AHRQ) network, National Institute for Health and Clinical Excellence (NICE) network, Scottish Intercollegiate Guidelines Network (SIGN), Guidelines International Network (GIN), Medlive, Registered Nurses’ Association of Ontario (RNAO) network, American Diabetes Association (ADA) network, New Zealand Guideline Group (NZGG) network, Canadian medical association clinical practice guidelines network, PubMed, EmBase, Web of Science, CINAHL, Cochrane Library, CNKI, China Science and Technology Journal Database, Wanfang Knowledge Data Service Platform and Chinese biomedical database were searched systematically to obtain guidelines, evidence summary, expert consensus, best practice information book, clinical decision-making, recommended practice, and systematic review on diet and physical activity management in patients with MS. The retrieval period is from the establishment of database to November 2021. Two researchers with evidence-based medicine background evaluated the quality and evidence level of the included literature. Results: A total of 36 articles met the criteria, including 3 guidelines, 5 expert consensus, 1 clinical decision and 27 systematic reviews. We summarized 49 pieces of evidence related to diet and physical activity in patients with MS, involving 15 aspects, namely diet goals, diet patterns, diet time, carbohydrate intake, fat intake, fiber intake, salt intake, fruits, vegetables and grains intake, coffee intake, effects of diet, principle of physical activity, intensity, form, time of physical activity, effects of physical activity, physical activity prescription of patients with MS and cardiovascular disease, and the joint effects of diet and physical activity. Conclusions: Diet and physical activity management can effectively improve the health outcomes of patients with MS. Health professionals should choose and apply the best evidence with consideration of the clinical situation and patient preference.

Research progress on multicomponent physical exercise for patients with neurocognitive impairment
JIN Qun,HUANG Lihua
J Zhejiang Univ (Med Sci), 2022, 51(1): 38-46.   https://doi.org/10.3724/zdxbyxb-2021-0312
Abstract( 6 )   HTML( 1 )     PDF(2273KB)( 2 )

Neurocognitive impairment is a group of clinical syndromes characterized by impaired cognitive function and decreased motor ability. Non-pharmacological interventions such as physical exercise have advantages in the treatment of patients with neurocognitive impairment. Multicomponent exercise is a combination of various physical exercises, including strength training, endurance training, balance training and flexibility training, that can improve gait, balance and cardiopulmonary function by increasing muscle mass, strength and endurance in people with neurocognitive impairment, while also reducing the risk of falls in elders. This article reviews the benefits of multicomponent exercise for patients with neurocognitive impairment and its evaluation methods; also describes 4 intervention programs and their clinical application, to provide evidence for clinical practice and promote the application of multicomponent exercise in patients with neurocognitive impairment.

Genotypes of Bordetella pertussis isolated from infants in Xi’an and Shanghai
ZHANG Juansheng,LIN Chen,CHANG Ling,WANG Xiaoqiang,WEI Xiaoguang,LI Hao
J Zhejiang Univ (Med Sci), 2022, 51(1): 47-52.   https://doi.org/10.3724/zdxbyxb-2021-0282
Abstract( 7 )   HTML( 0 )     PDF(2149KB)( 1 )

Objective: To compare the genotypes of Bordetella pertussis isolated from infants in Xi’an and Shanghai. Methods: Samples were collected by nasopharyngeal swab from infants aged <1?year hospitalized with suspected pertussis in Xi’an and Shanghai during 2018 and 2019. Bordetella pertussis was isolated, and multilocus antigen sequence typing (MAST) and multilocus variable-number tandem repeat analysis (MLVA) were used to analyse the genotypes. Results: A total of 1200 samples were collected from infants suspected of pertussis and 60 strains of Bordetella pertussis were isolated, including 34 strains in Xi’an and 26 strains in Shanghai. There were significant differences in the MAST types between Xi’an and Shanghai (χ2=18.642, P<0.01); theprn1/ptxP1/ptxA1/fim3-1/fim2-1 strains dominated in Xi’an (32/34, 94.12%), while the dominated MAST types in Shanghai were prn1/ptxP1/ptxA1/fim3-1/fim2-1 (13/26, 50.00%) and prn2/ptxP3/ptxA1/fim3-1/fim2-1 (11/26, 42.31%). The composition of MLVA type of pertussis strains was also significantly different between Xi’an and Shanghai (χ2=15.866, P<0.01); the MT195 (13/34, 38.24%), MT55 (10/34, 29.41%) and MT104 (9/34, 26.47%) strains dominated in Xi’an, while the MT27 (12/26, 46.15%) strain was most common in Shanghai.Conclusion: There are differences in molecular types of Bordetella pertussis isolated from infants with suspected persussis in Xi’an and Shanghai, indicating that further monitoring of Bordetella pertussis is necessary for better understanding the pathogen evolution in China.

Efficacy of Qingfei oral liquid for idiopathic pulmonary fibrosis in rats and related network pharmacology study
ZHANG Yiwen,SHENG Kongsheng,SONG Feifeng,PAN Zongfu,ZOU Xiaozhou,LIU Yujia,HUANG Ping
J Zhejiang Univ (Med Sci), 2022, 51(1): 53-61.   https://doi.org/10.3724/zdxbyxb-2021-0203
Abstract( 7 )   HTML( 2 )     PDF(11308KB)( 1 )

Objective:To investigate the therapeutic effect and mechanism of Qingfei oral liquid in idiopathic pulmonary fibrosis. Methods: Seventy-two male SD rats were divided into control group, model group, pirofenidone group and Qingfei group with 18 animals in each group. The idiopathic pulmonary fibrosis was induced in last three groups by intratracheal injection of 3?mg/kg bleomycin; pirofenidone group was given oral administration of 50?mg/kg pirofenidone b.i.d for 21?d, and Qingfei group was given Qingfei oral liquid 3.6?mL/kg q.d for 21?d. Lung tissues were obtained for HE staining, Masson staining and transforming growth factor (TGF)-β immunohistochemical staining. Superoxide dismutase (SOD), malondialdehyde (MDA) and glutathione (GSH) were detected in tissue homogenates. The BATMAN-TCM database was used to retrieve the chemical components and their corresponding targets of Qingfei oral solution by network pharmacology method, and then the component-target-disease network diagram was constructed. Finally, the pathway enrichment analysis was carried out to explore the molecular mechanism of Qingfei oral liquid against idiopathic fibrosis. Results: Histopathology results showed that Qingfei oral liquid had a similar relieving effect on pulmonary fibrosis as the positive drug pirfenidone; TGF-β secretion had a significant reduction in lung tissues of Qingfei group; and Qingfei oral liquid had better regulatory effect on SOD, MDA and GSH than pirfenidone. The results of component-target-disease network and pathway enrichment analysis showed that the related molecular pathways were concentrated in inflammation, extracellular matrix and cytokines. Conclusion: Qingfei oral liquid has a good therapeutic effect on idiopathic pulmonary fibrosis in rats via regulation of inflammation, extracellular matrix and cytokines.

Molecular mechanism of ovarian toxicity of Tripterygium wilfordii Hook.F.: a study based on network pharmacology and molecular docking
WANG Zhiqiang,GONG Caixia,LI Zhenbin
J Zhejiang Univ (Med Sci), 2022, 51(1): 62-72.   https://doi.org/10.3724/zdxbyxb-2021-0230
Abstract( 6 )   HTML( 0 )     PDF(6936KB)( 2 )

Objective: To explore the mechanism of ovarian toxicity of Tripterygium wilfordii Hook. F. (TwHF) by network pharmacology and molecular docking. Methods: The candidate toxic compounds and targets of TwHF were collected by the Traditional Chinese Medicine Systems Pharmacology Database and Analysis Platform (TCMSP) and the Comparative Toxicogenomics Database (CTD). Then, the potential ovarian toxic targets were obtained from CTD, and the target genes of ovarian toxicity of TwHF were analyzed using the STRING database. The protein-protein interaction (PPI) network was established by Cytoscape and analyzed by the cytoHubba plug-in to identify hub genes. Additionally, the target genes of ovarian toxicity of TwHF were subjected to Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analyses by using the R software. Finally, Discovery Studio software was used for molecular docking verification of the core toxic compounds and the hub genes. Results: Nine candidate toxic compounds of TwHF and 56 potential ovarian toxic targets were identified in this study. Further network analysis showed that the core ovarian toxic compounds of TwHF were triptolide, kaempferol and tripterine, and the hub ovarian toxic genes included TP53, MYC, PTEN, MAPK3, MTOR, STAT3, EGFR, KRAS, CDH1 and AKT1. Besides, the GO and KEGG analysis indicated that TwHF caused ovarian toxicity through oxidative stress, reproductive system development and function, regulation of cell cycle, response to endogenous hormones and exogenous stimuli, apoptosis regulation and aging. The docking studies suggested that 3 core ovarian toxic compounds of TwHF were able to fit in the binding pocket of the 10 hub genes. Conclusion: TwHF may cause ovarian toxicity by acting on 10 hub genes and 140 signaling pathways.

Comparison of different neonatal illness severity scores in predicting mortality risk of extremely low birth weight infants
YANG Yang,CHI Xia,TONG Meiling,ZHOU Xiaoyu,CHENG Rui,PAN Jingjing,CHEN Xiaoqing
J Zhejiang Univ (Med Sci), 2022, 51(1): 73-78.   https://doi.org/10.3724/zdxbyxb-2021-0217
Abstract( 7 )   HTML( 0 )     PDF(2264KB)( 1 )

Objective:To compare different illness severity scores in predicting mortality risk of extremely low birth weight infants (ELBWI). Methods:From January 1st, 2019 to January 1st, 2020, all ELBWI admitted in the Children’s Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital and the First Affiliated Hospital of Nanjing Medical University were included in the study. ELBWI with admission age ≥1?h, gestational age ≥37 weeks and incomplete data required for scoring were excluded. The clinical data were collected, neonatal critical illness score (NCIS), score for neonatal acute physiology version Ⅱ (SNAP-Ⅱ), simplified version of the score for neonatal acute physiology perinatal extension (SNAPPE-Ⅱ), clinical risk index for babies (CRIB) and CRIB-Ⅱ were calculated. The scores of the fatal group and the survival group were compared, and the receiver operating characteristic (ROC) curve was used to evaluate the predictive value of the above illness severity scores for the mortality risk of ELBWI. Pearson correlation analysis was used to analyze the correlation between illness scores and birth weight, illness scores and gestational age. Results:A total of 192 ELBWI were finally included, of whom 114 cases survived (survival group) and 78 cases died (fatal group). There were significant differences in birth weight, gestational age and Apgar scores between fatal group and survival group (all P<0.01). There were significant differences in NCIS, SNAP-Ⅱ, SNAPPE-Ⅱ, CRIB and CRIB-Ⅱ between fatal group and survival group (allP<0.01). The CRIB had a relatively higher predictive value for the mortality risk. Its area under the ROC curve (AUC) was 0.787, the sensitivity was 0.678, the specificity was 0.804, and the Youden index was 0.482. The scores of NCIS, SNAP-Ⅱ, SNAPPE-Ⅱ, CRIB and CRIB-Ⅱ were significantly correlated with birth weight and gestational age (allP<0.05). The correlation coefficients of CRIB-Ⅱ and CRIB with birth weight and gestational age were relatively large, and the correlations coefficients of NCIS with birth weight and gestational age were the smallest (0.191 and 0.244, respectively).Conclusion:Among these five illness severity scores, CRIB has better predictive value for the mortality risk in ELBWI. NCIS, which is widely used in China, has relatively lower sensitivity and specificity, and needs to be further revised.

Construction of prognosis model of bladder cancer based on transcriptome
CHEN Qiu,CAI Liangliang,LIANG Jingyan
J Zhejiang Univ (Med Sci), 2022, 51(1): 79-86.   https://doi.org/10.3724/zdxbyxb-2021-0368
Abstract( 8 )   HTML( 0 )     PDF(3328KB)( 0 )

Objective: To screen for prognosis related genes in bladder cancer, and to establish prognosis model of bladder cancer. Methods: The clinical information and bladder tissue RNA sequencing data of 406 bladder cancer patients, and the bladder tissue RNA sequencing data of 28 healthy individuals were downloaded from The Cancer Genome Atlas (TCGA) database, Genotype-Tissue Expression (GTEx) database through the UCSC Xena platform. The weighted gene co-expression network analysis (WGCNA), univariate Cox regression, LASSO regression analysis and multivariate Cox regression analysis were used to screen the prognosis-related genes of bladder cancer and the prognostic model was established. The prognostic model was evaluated with receiver operator characteristic curve (ROC curve). Results: A total of 2308 differentially expressed genes related to bladder cancer were obtained from the analysis. Six gene modules were obtained by WGCNA, and 829 genes with significant effect on bladder cancer prognosis were screened out. Univariate Cox regression and LASSO regression analysis showed that 24 genes were related to the prognosis of bladder cancer patients. Multivariate Cox regression analysis revealed 9 genes as independent predictors in training set, namely ADCY9, MAFG_DT, EMP1, CAST, PCOLCE2, LTBP1, CSPG4, NXPH4, SLC1A6, which were used to establish the prognosis model of bladder cancer patients. The 3-year survival rates of the high-risk group and the low-risk group in the training set were 31.814% and 59.821%, respectively. The 3-year survival rates of the high-risk group and the low-risk group in the test set were 32.745% and 68.932%, respectively. The areas under the ROC curve of the model for predicting the prognosis of bladder cancer patients in both the training set and the test set were above 0.7. Conclusion: The established model in this study has good predictive ability for the survival of bladder cancer patients.

Quantitative analysis of maxillary palatal masticatory mucosa thickness and anatomical morphology of palatal vault in Zhejiang province
SHEN Chenlu,GAO Bicong,LYU Kejia,YE Weijia,YAO Hua
J Zhejiang Univ (Med Sci), 2022, 51(1): 87-94.   https://doi.org/10.3724/zdxbyxb-2021-0334
Abstract( 5 )   HTML( 0 )     PDF(3922KB)( 0 )

Objective: To quantitatively analyze the maxillary palatal masticatory mucosa thickness and anatomical morphology of palatal vault in Zhejiang province. Methods: Cone beam computed tomography (CBCT) images of 146 adult patients were collected from outpatients in Department of Stomatology, the First Affiliated Hospital, Zhejiang University School of Medicine. The images were reconstructed by adjusting the reference line and analyzed on the sagittal plane of the measured teeth. The thickness of masticatory mucosa from maxillary canine to second molar area was measured at the level of 3, 6, 9, 12?mm from the gingival margin. At the same time, the height and width of the palatal vault were measured, the position of the greater palatal foramen relative to the second molar, and the distance from the greater palatal foramen to the mid-palatal suture and the alveolar crest were determined. Spearman correlation analysis and multiple regression analysis were used to explore the influencing factors of the maxillary masticatory mucosa thickness. One-way analysis of variance and LSD multiple comparisons were used to analyze the difference in palatal mucosal thickness of each tooth position in different age groups. The sample t-test was used to analyze the differences in the mucosal thickness of each tooth position and the distance from the greater palatal foramen to the mid-palatal suture and the alveolar crest in different anatomical forms of the palatal vault. Results: The mean palatal masticatory mucosa thickness from maxillary canines, first premolars, second premolars, first molar and second molar areas were (2.94±0.48), (3.28±0.49), (3.43±0.53), (3.01±0.55), (3.49±0.70)?mm, respectively. The mucosa thickness of canines, first premolars and second premolars areas showed increasing at first and then decreasing trend. The mucosal thickness of the canines area was greatest at 6?mm from the gingival margin, and the thickness of the first and second premolars areas was greatest at 9?mm from the gingival margin. Premolars are thickest at 9?mm from the gingival margin. The thickness of the mucosa of the first molars area increased with the increase of the distance from the gingival margin, and the thickness of the mucosa of the second molars area was the thinnest at 6?mm, and then increased with the increase of the distance from the gingival margin. The main influencing factors of the mucosal thickness of canines, first premolars and first molars areas were age and palatal vault aspect ratio, the main influencing factor of the mucosal thickness of second premolars area was age, and the main influencing factor of the mucosal thickness of second molars area was palatal vault aspect ratio. There was no significant colinearity among the variables (VIF<10). The results of the further stratified analysis showed that the mucosal thickness of the maxillary canine to the first molar area was positively correlated with age, and mucosal thickening is more pronounced in people aged 45 years old and above. The thickness of the canine mucosa in the high palate vault group was greater than that in the low palate vault group (P<0.05), and the thickness of the second molar mucosa was smaller than that in the low palate vault group (P<0.05). The greater palatal foramen was mostly located in the distal region of the second molar crown. The distance from the greater palatal foramen to the alveolar crest in the high palatal vault group was greater than that in the low palatal vault group (P<0.05), while there was no significant difference between the two groups in the distance from the foramen magnum to the mid-palatal suture (P>0.05).Conclusion: The most suitable donor site for autologous soft tissue graft may be 3–9?mm from the gingival margin of the first and second premolars area.

Advances in relationship between cell senescence and atherosclerosis
LIU Dekun,LIU Jiali,ZHANG Dan,YANG Wenqing
J Zhejiang Univ (Med Sci), 2022, 51(1): 95-101.   https://doi.org/10.3724/zdxbyxb-2021-0270
Abstract( 8 )   HTML( 2 )     PDF(2025KB)( 2 )

Cellular senescence is a biological process associated with the degeneration of cell structure and function, which contribute to age-related diseases. Atherosclerosis is a chronic inflammatory disease that can cause a variety of cardiovascular disorders. In this article, we review the effects of cellular senescence on the development of atherosclerosis through diverse physiopathological changes, focusing on the alterations in senescent organelles and the increased senescence-associated secretory phenotype (SASP), and exploring the relevant therapeutic strategies for atherosclerosis by clearing senescent cells and reducing SASP, to provide new insights for the treatment of atherosclerosis.

Research progress on effect of magnetic nanoparticle composite scaffold on osteogenesis
WANG Wenni,CHEN Chaoqun,GU Xinhua
J Zhejiang Univ (Med Sci), 2022, 51(1): 102-107.   https://doi.org/10.3724/zdxbyxb-2021-0398
Abstract( 7 )   HTML( 0 )     PDF(2002KB)( 0 )

Magnetic nanoparticles (MNP) have been widely used as biomaterials due to their unique magnetic responsiveness and biocompatibility, which also can promote osteogenic differentiation through their inherent micro-magnetic field. The MNP composite scaffold retains its superparamagnetism, which has good physical, mechanical and biological properties with significant osteogenic effects in vitro and in vivo. Magnetic field has been proved to promote bone tissue repair by affecting cell metabolic behavior. MNP composite scaffolds under magnetic field can synergically promote bone tissue repair and regeneration, which has great application potential in the field of bone tissue engineering. This article summarizes the performance of magnetic composite scaffold, the research progress on the effect of MNP composite scaffold with magnetic fields on osteogenesis, to provide reference for further research and clinical application.

Research progress on the relationship between chronic periodontitis and Parkinson’s disease
BIAN Mengyao,CHEN Lili,LEI Lihong
J Zhejiang Univ (Med Sci), 2022, 51(1): 108-114.   https://doi.org/10.3724/zdxbyxb-2021-0111
Abstract( 8 )   HTML( 2 )     PDF(2069KB)( 1 )

Chronic periodontitis is an infectious disease, which has a reciprocal relationship with a variety of systemic disorders. Parkinson’s disease is a prevalent neurodegenerative disease in which inflammation plays an important role for its progression. A vast number of studies suggest that there is a potential connection between chronic periodontitis and neurodegenerative diseases such as Parkinson’s disease. Individuals with Parkinson’s disease usually have poor periodontal health, and their oral flora composition differs from that of healthy people; at the same time, patients with chronic periodontitis have a higher risk of Parkinson’s disease, which can be reduced with regular periodontal treatment. In fact, the mechanism of interaction between chronic periodontitis and Parkinson’s disease is not clear. According to several studies, the clinical symptoms of Parkinson’s disease prevent patients to maintain oral hygiene effectively, increasing the risk of periodontitis. Neuroinflammation mediated by microglia may be the key to the influence of chronic periodontitis on Parkinson’s disease. Periodontal pathogens and inflammatory mediators may enter the brain and activate microglia in various ways, and ultimately leading to occurrence and development of Parkinson’s disease. This article reviews the recent research progress on the association between chronic periodontitis and Parkinson’s disease, and its potential mechanism to provide information for further research.

Design and development of a Wechat applet for intelligent health management of metabolic syndrome
TANG Leiwen,CHEN Dandan,SHAO Jing,ZHANG Hui,WU Jingjie,YE Zhihong
J Zhejiang Univ (Med Sci), 2022, 51(1): 115-121.   https://doi.org/10.3724/zdxbyxb-2021-0380
Abstract( 6 )   HTML( 1 )     PDF(2744KB)( 2 )

Objective: To design and develop a Wechat applet for intelligent health management of metabolic syndrome. Methods: Based on the needs and requirements of individuals undergoing health check-up, patients with metabolic syndrome and medical workers, a Wechat applet for metabolic syndrome management was designed and developed, which involving health data collection, health risk prediction, health management knowledge base fusion and intelligent recommendation, data privacy and security. Results: The platform consists of three user ports: individuals undergoing health check and patients with metabolic syndrome, the medical workers and the system administrators. The main functions of the platform included metabolic syndrome risk prediction, intelligent recommendation of health management strategies, health behavior record and supervision, experts’ consultation and health knowledge guide. Conclusion: The Wechat applet developed in this study can be used for metabolic syndrome risk prediction for general population, and health management for patients with metabolic syndrome, which helps them to enhance health management awareness and health behavior adherence.

Expert consensus on diagnosis and treatment of very long-chain acyl-CoA dehydrogenase deficiency
LIN Wenhui
J Zhejiang Univ (Med Sci), 2022, 51(1): 122-128.   https://doi.org/10.3724/zdxbyxb-2022-0107
Abstract( 6 )   HTML( 0 )     PDF(2272KB)( 1 )

Very long-chain acyl-CoA dehydrogenase (VLCAD) deficiency is a metabolic disease of long chain fatty acid oxidation. The clinical manifestations are heterogeneous, mainly with heart, liver, skeletal muscle and brain damage, and the onset of which can be from newborn to adult. Cardiomyopathy type is more serious with high mortality. The liver failure type and myopathy type would be potentially lethal, but generally the prognosis is relatively good. Recurrent hypoglycemia, energy metabolism disorder, liver dysfunction, cardiomyopathy and serious arrhythmia are the main causes of death. Most patients can be identified through neonatal screening, and the prognosis is usually good in patients with early diagnosis and treatment. The purpose of this consensus is to standardize the diagnosis, treatment and management of VLCAD deficiency, so as to improve the prognosis of patients and reduce death and disability.

Expert consensus on screening, diagnosis and treatment of multiple carboxylase deficiency
SHAO Jing
J Zhejiang Univ (Med Sci), 2022, 51(1): 129-135.   https://doi.org/10.3724/zdxbyxb-2022-0164
Abstract( 4 )   HTML( 0 )     PDF(2483KB)( 1 )

Multiple carboxylase deficiency (MCD) includes autosomal recessive holocarboxylase synthetase (HLCS) deficiency and biotinidase (BTD) deficiency, which are caused by HLCS and BTD gene mutations respectively. Neonatal screening for HLCS deficiency is based on 3-hydroxyisovaleryl carnitine in dry blood filter paper, and BTD deficiency is based on BTD activity determination. HLCS deficiency and BTD deficiency are characterized by neurocutaneous syndrome and organic aciduria, however, they are different in onset age, neurological symptoms and metabolic decompensation, which needed to be differentiated from acquired biotin deficiency or other genetic metabolic diseases. The diagnosis of the disease requires a combination of biochemical characteristics of hematuria, enzyme activity determination and genetic test. Routine biotin doses are effective for most MCD patients. This consensus is intended to benefit early screening and diagnosis of MCD.

17 articles