Catalpol ameliorates LPS-induced endometritis by inhibiting inflammation and TLR4/NF-κB signaling / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

Catalpol is the main active ingredient of an extract from Radix rehmanniae, which in a previous study showed a protective effect against various types of tissue injury. However, a protective effect of catalpol on uterine inflammation has not been reported. In this study, to investigate the protective mechanism of catalpol on lipopolysaccharide (LPS)-induced bovine endometrial epithelial cells (bEECs) and mouse endometritis, in vitro and in vivo inflammation models were established. The Toll-like receptor 4 (TLR4)/nuclear factor-κB (NF-κB) signaling pathway and its downstream inflammatory factors were detected by enzyme-linked immunosorbent assay (ELISA), quantitative real-time polymerase chain reaction (qRT-PCR), western blot (WB), and immunofluorescence techniques. The results from ELISA and qRT-PCR showed that catalpol dose-dependently reduced the expression of pro-inflammatory cytokines such as tumor necrosis factor α (TNF-α), interleukin (IL)-1β, and IL-6, and chemokines such as C-X-C motif chemokine ligand 8 (CXCL8) and CXCL5, both in bEECs and in uterine tissue. From the experimental results of WB, qRT-PCR, and immunofluorescence, the expression of TLR4 and the phosphorylation of NF-κB p65 were markedly inhibited by catalpol compared with the LPS group. The inflammatory damage to the mouse uterus caused by LPS was greatly reduced and was accompanied by a decline in myeloperoxidase (MPO) activity. The results of this study suggest that catalpol can exert an anti-inflammatory impact on LPS-induced bEECs and mouse endometritis by inhibiting inflammation and activation of the TLR4/NF-κB signaling pathway.

Effect of Rapid Eye Movement Sleep Behavior Disorder on Obstructive Sleep Apnea Severity and Cognition of Parkinson's Disease Patients / 中华医学杂志(英文版)

<p><b>Background</b>Rapid eye movement (REM) sleep behavior disorder (RBD) and obstructive sleep apnea (OSA) are the most common sleep disorders in Parkinson's disease (PD). The aim of this study was to identify whether RBD could alleviate OSA severity in PD patients and its effect on cognitive impairment.</p><p><b>Methods</b>From February 2014 to May 2017, we recruited 174 PD patients from the Second Affiliated Hospital of Soochow University, all of whom underwent polysomnography (PSG). We collected clinical data, PSG results, and compared information between patients with and without RBD or OSA by analysis of covariance. We also investigated the effect of these sleep disorders on cognitive impairment using linear regression.</p><p><b>Results</b>We grouped participants as follows: PD only (n = 53), PD + OSA (n = 29), PD + RBD (n = 61), and PD + RBD + OSA (n = 31). Minimum oxygen saturation (SaO) during whole sleep and in REM sleep was higher in PD + RBD + OSA patients than that in PD + OSA patients. PD + RBD patients had worse Mini-Mental Status Examination and Montreal Cognitive Assessment (MoCA) scores than those in the PD group (P < 0.001), especially in visuospatial/executive, attention, and memory functions. The PD + OSA group performed worse than the PD group in the delayed recall domain. After adjusting for age, sex, body mass index, education, disease severity, and other sleep disorders, MoCA was negatively associated with OSA (β = -0.736, P = 0.043) and RBD (β = -2.575,P < 0.001). The severity of RBD (tonic/phasic electromyography activity) and OSA (apnea-hypopnea index/oxygen desaturation index/minimum SaO) were also associated with MoCA. The adjusted β values of RBD-related parameters were higher than that for OSA.</p><p><b>Conclusions</b>We found that RBD alleviated OSA severity; however, RBD and OSA together exacerbated PD cognitive impairment. Further studies are needed to evaluate whether OSA treatment can improve cognition in PD.</p>

Long-term Levodopa Treatment Accelerates the Circadian Rhythm Dysfunction in a 6-hydroxydopamine Rat Model of Parkinson's Disease / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Parkinson's disease (PD) patients with long-term levodopa (L-DOPA) treatment are suffering from severe circadian dysfunction. However, it is hard to distinguish that the circadian disturbance in patients is due to the disease progression itself, or is affected by L-DOPA replacement therapy. This study was to investigate the role of L-DOPA on the circadian dysfunction in a rat model of PD.</p><p><b>METHODS</b>The rat model of PD was constructed by a bilateral striatal injection with 6-hydroxydopamine (6-OHDA), followed by administration of saline or 25 mg/kg L-DOPA for 21 consecutive days. Rotarod test, footprint test, and open-field test were carried out to evaluate the motor function. Striatum, suprachiasmatic nucleus (SCN), liver, and plasma were collected at 6:00, 12:00, 18:00, and 24:00. Quantitative real-time polymerase chain reaction was used to examine the expression of clock genes. Enzyme-linked immunosorbent assay was used to determine the secretion level of cortisol and melatonin. High-performance liquid chromatography was used to measure the neurotransmitters. Analysis of variance was used for data analysis.</p><p><b>RESULTS</b>L-DOPA alleviated the motor deficits induced by 6-OHDA lesions in the footprint and open-field test ( P < 0.01, P < 0.001, respectively). After L-DOPA treatment, Bmal1 decreased in the SCN compared with 6-OHDA group at 12:00 ( P < 0.01) and 24:00 ( P < 0.001). In the striatum, the expression of Bmal1, Rorα was lower than that in the 6-OHDA group at 18:00 (P < 0.05) and L-DOPA seemed to delay the peak of Per2 to 24:00. In liver, L-DOPA did not affect the rhythmicity and expression of these clock genes (P > 0.05). In addition, the cortisol secretion was increased (P > 0.05), but melatonin was further inhibited after L-DOPA treatment at 6:00 (P < 0.01).</p><p><b>CONCLUSIONS</b>In the circadian system of advanced PD rat models, circadian dysfunction is not only contributed by the degeneration of the disease itself but also long-term L-DOPA therapy may further aggravate it.</p>

Study on knowledge,attitudes and use of the pre-packaged food nutrition labeling in Hangzhou supermarket consumers in 2010 / 中华流行病学杂志

Objective To study the prevalence rates of knowledge,attitudes and use of the nutrition labeling and related influential factors in Hangzhou supermarket consumers.Methods Using a self-developed survey questionnaire,randomly selected customers were conducted a face-toface interview program in a large supermarket of Hangzhou city.Results 586 people were interviewed,including 202 males and 384 females,with the mean age as 41.6±17.23 years.The Facts Labels'were as follows:dietary fiber(71.84%),fat(70.99%),calcium(60.75%),salt (58.36%),energy(50.85%)and sugar(39.42%).The support rates of the three attitudes indicators were"support marking the Nutrition Facts Label"(90.44%)."support marking the nutrition claims"(87.03%)and"want to know more relative knowledge"(77.13%).There were 58.36% and 80.03%first-time buyers who would read the Nutrition Facts Food Labels and the Nutrition Claims.Through logistic model analysis,male,youth,low-educated people were found to be the risk factors related to the nutrition label reading behavior.Conclusion The capacity of the reading,understanding and correct application of nutrition labeling among consumers was not satisfactory.Improvement on the readability and the authority of nutrition labeling and the development of the national nutrition knowledge and health education programs were in urgent needs.

Application of health vignettes in correcting self-reported health condition / 中华流行病学杂志

To introduce the application of vignettes in the survey on health condition,we took the Hangzhou health survey as an example. We tried to find the respondents' health judgment standard by using vignettes first and discovered the population' s demographic characteristics as sex,age, years of schooling and income etc. could influence the self-reported health condition on the response category cut-points. Then the cut-points were corrected through hierarchical ordered probit model in order to reflect the respondents' self-reported health condition based on the same standard,making the result suitable for comparison. Data from our research discovered that the level of health condition of females was lower than that of males among the residents living in Hangzhou and the higher income they received, the better health condition they had. Thus, the health vignettes seemed very essential in the survey on health condition.

Sequence analysis and genotypes of glutamate rich protein of Plasmodium falciparum isolates from different malaria endemic areas in China / 生物医学与环境科学（英文）

<p><b>OBJECTIVE</b>To sequence the gene encoding glutamate rich protein (GLURP) and identify the genotypes of geographically different Plasmodium falciparum (P. f) isolates from China.</p><p><b>METHODS</b>The gene of R2 repeat region of GLURP was amplified by nested polymerase chain reaction and cloned into T-vector. The nucleotide sequence of GLURP gene was determined by automatic sequencer (Dideoxy termination method) and analyzed by DNA Star software.</p><p><b>RESULTS</b>At least 7 different GLURP genotypes ranging from 600 bp to 1,500 bp were found in Yunnan and Hainan provinces. R2 region of GLURP gene consisted of several repeat units. Each repeat unit was composed of 19-20 residues which were shown to be highly conserved. GLURP gene was also size polymorphic due to differences in the number of repeat units, whereas the repeat sequence was conserved. Sequence analysis showed that DNA sequences and deduced amino acid sequences were highly homologous among the geographically dispersed isolates or various isolates from the same geographical region. No obvious differences were found in the GLURP gene sequences among geographically different isolates.</p><p><b>CONCLUSION</b>GLURP gene is highly structure conserved and size polymorphic, and so is useful in searching for malaria vaccine candidate antigen and developing a genotyping method for malaria research.</p>