Objective To propose a new diagnostic criterion for rosacea based on the analysis of clinical features of rosacea in a large sample.Methods A total of 1 090 Chinese outpatients with rosacea were enrolled from Department of Dermatology of Xiangya Hospital,and their demographic data,clinical manifestations and subjective symptoms were collected.According to results of descriptive analysis,clinical features of rosacea were summarized,and a new diagnostic criterion for rosacea was set up.Then,the sensitivity and specificity of the new diagnostic criterion were verified among 1 200 outpatients clinically characterized by facial erythema.Results Of 1 090 patients with rosacea,131 (12.0％) were male and 959(88.0％) were female,and the average age was 33.5 ± 11.1 years (range,10-66).Among the 1 090 patients,715 (65.6％) had initial lesions on the cheek,of whom,712 (99.6％) had intermittent flushing as the initial symptom,and 689 (96％) had sensitive skin symptoms such as dryness,burning and itching sensations;208 (19.1％) had initial lesions on the perioral region,of whom,204 (98.1％) had persistent erythema as the initial symptom;167 (15.3％) had initial lesions on the nose,of whom,163 (97.6％) had persistent erythema as the initial symptom;in addition,311 (28.5％) had lesions on the ocular region,and only 24 (2.2％) had lesions outside the face on the neck and retroauricular region.Based on these clinical features,a new diagnostic criterion for rosacea was proposed,including 1 major condition (intermittent flushing or persistent erythema on the cheek,perioral region or nose) and 5 minor conditions (1.sensitive skin symptoms such as burning,tingling,drying or itching sensations;2.telangiectasia;3.papules or pustules;4.hypertrophy;5.ocular symptoms).If with the major condition and at least one minor condition were met,patients could be diagnosed with rosacea.After verification among 1 200 patients with facial dermatitis clinically characterized by facial erythema,the new criterion was proved to have a sensitivity of 99.3％ and a specificity of 95.8％.Conclusion A new diagnostic criterion for rosacea with high sensitivity and specificity is proposed,which is worthy of clinical application.

OBJECTIVETo observe the protective effect of metformin on the endothelial function and the mechanisms in rats with low-density lipoprotein (LDL) injection.

METHODSA single dose (4 mg/kg) of natural LDL was injected through the sublingual vein of rats to induce vascular endothelial dysfunction. Blood samples were then collected from the rats to detect the concentrations of malondialdehyde (MDA) and nitric oxide (NO), activity of superoxide dismutase (SOD) and serum lipid levels. The thoracic aorta of rats was obtained to assay acetylcholine (ACh)-induced endothelium-dependent relaxation (EDR) and sodium nitroprusside (SNP)-induced endothelium-independent relaxation. The effects of metformin pretreatment on the endothelial functions in the rats were investigated.

RESULTSA single-dose LDL significantly inhibited ACh-induced EDR without affecting SNP-induced endothelial-independent relaxation. The injection decreased serum NO and elevated serum MDA level, but had no effect on serum lipid level. Metformin markedly attenuated LDL-induced inhibition of EDR, serum MDA elevation, and serum NO reduction without affecting the serum lipid levels.

CONCLUSIONMetformin provides protection against vascular endothelial dysfunction induced by LDL in rats, the mechanism of which is probably associated with protection of endothelium-dependent relaxation factor and inhibition of the oxidative stress.

Animals ; Endothelium, Vascular ; drug effects ; physiopathology ; Endothelium-Dependent Relaxing Factors ; metabolism ; Lipoproteins, LDL ; administration & dosage ; Male ; Malondialdehyde ; blood ; Metformin ; pharmacology ; Nitric Oxide ; blood ; Oxidative Stress ; drug effects ; Rats ; Rats, Sprague-Dawley ; Superoxide Dismutase ; metabolism ; Vasodilation ; drug effects ; physiology

OBJECTIVETo study action of Cryptoporus volvatus ferment substance (CVFS) on leukotriene production of polymorphonuclear leukocytes in rats.

METHODSThe level of slow reaction substance (SRS) and leukotriene B4 (LTB4) in polymorphonuclear leukocytes (PMNs) in rats in vitro were determined with bioassay and HPLC.

RESULTSCVFS 0.9, 2.7 g.kg-1 by ig significantly inhibited SRS and LTB4 production in PMNs in rats in vivo.

CONCLUSIONThe inhibition effect of CVFS on SRS and LTB4 release may be related to its mechanism of anti-inflammation and anti-asthma.

Animals ; Anti-Asthmatic Agents ; pharmacology ; Anti-Inflammatory Agents, Non-Steroidal ; pharmacology ; Cell Separation ; Dose-Response Relationship, Drug ; Drugs, Chinese Herbal ; isolation & purification ; pharmacology ; Female ; Guinea Pigs ; Leukotriene B4 ; metabolism ; Male ; Neutrophils ; metabolism ; Polyporaceae ; chemistry ; Rats ; Rats, Sprague-Dawley ; SRS-A ; metabolism

Antiviral Agents/adverse effects* ; Betacoronavirus ; COVID-19 ; Cardiovascular System/drug effects* ; Coronavirus Infections/drug therapy* ; Humans ; Pandemics ; Pneumonia, Viral/drug therapy* ; SARS-CoV-2

Objective:To explore the composition characteristics of rhizosphere soil under Rehmannia glutinosa-Zea mays intercropping model，and screen out special signal substances in rhizosphere soil of R. glutinosa under intercropping Z. mays， so as to provide the basis for the study of allelopathic substances in continuous cropping obstacle of R. glutinosa. Method:In this experiment，rhizosphere soils of R. glutinosa under Z. mays intercropping and R. glutinosa single cropping models in July，August，September and October were taken as the research objects， and the volatile organic compounds in ethyl acetate fraction were analyzed by gas chromatography-mass spectrometry （GC-MS）. Principal component analysis （PCA）， hierachical cluster analysis （HCA） and orthogonal partial least squares discriminant analysis （OPLS-DA） analysis were performed on the data by SIMCA 14.1 to screen out potential differences in volatile organic compounds between the two models. Result:The types of volatile organic compounds in intercropping and single cropping models were mainly hydrocarbons， alcohols， esters， ketones， amides， acids and other substances. Specifically， the average relative contents of hydrocarbons，esters and amides in intercropping model were 58.46%，32.15% and 5.42% respectively，while the relative contents of hydrocarbons，esters and amides in single cropping model were 37.27%，36.11% and 21.13%. The results of PCA and HCA showed that the characteristics of volatile organic compounds in the ethyl acetate fraction of rhizosphere soil under intercropping and single cropping models could be clearly divided into two categories，the screening results of potential differential components based on OPLS-DA analysis indicated that various components， such as dibutyl phthalate，（Z）-9-oleamide，β-caryophyllene，dioctyl iso-phthalate， phthalate （2-propylamyl） diester， n-hexadecane，octodecane， n-heneicosane， were screened from rhizosphere soil under the two models. Conclusion:The R. glutinosa-Z. mays intercropping model has certain effects on the volatile organic compounds in the rhizosphere soil of R. glutinosa，and the effect of the selected components on the growth and quality characteristics of R. glutinosa still need to be further studied.

Objective:To investigate the effective substance of the choleretic effect of Gardeniae Fructus，and analyze the relationships between its choleretic effect and the HPLC fingerprint chromatogram. Method:HPLC method was applied to establish the fingerprint chromatography of 8 batches of Gardeniae Fructus at different harvest periods. The flow，the content of bile acid，bilirubin and cholesterol in bile were tested，and then the principal component analysis was used to comprehensively evaluate the total choleretic effects of Gardeniae Fructus. After the relationships between the relative peak area of the common peaks and the choleretic effects were explored using grey relationship analysis method，the spectrum-effect relationship of Gardeniae Fructus was established. Result:The order of the contribution of the chemical components to the choleretic effect at the common peaks was as follow（r>0.8）：P9>P14>P26>P4>P30>P6>P1>P10>P5>P24. Among all peaks，the full wavelength scanning results implied that the peaks 9，14 and 4 might be iridoids, and the peaks 26，30 and 24 might be crocins. By comparing with the standard substances，the peak 9 was finally identified as geniposide. Conclusion:The choleretic effect of Gardeniae Fructus may be the results of multiple components and pathways，and the main components in Gardeniae Fructus with the choleretic effect was from geniposide. In conclusion，these results provide a reference for investigating the material basis of choleretic effect of Gardeniae Fructus.