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Kong LM, Zhang L, Ye LJ, Yang JW, Liu YL, Song SL. [To take the initiative in the prevention and control of the coronavirus disease 2019 epidemic in the changing and unchanged strategies]. Zhonghua Yi Xue Za Zhi 2022; 102:463-467. [PMID: 35184500 DOI: 10.3760/cma.j.cn112137-20211221-02838] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In early 2020, an outbreak of coronavirus disease 2019 (COVID-19) epidemic happened in China. In the following three months, 42 600 medical personnels and more than 9 000 public health employees were "rushed out" of their own position and onto Wuhan and other areas in Hubei Province. They helped to strengthen the treatment of severe cases and the isolation of mild cases, and actively carried out community screenings, and eventually won victory in the defense of Wuhan. During the normalization stage of prevention and control of the epidemic of COVID-19, China adopted the expanded preventive strategy by focusing on widely implement PCR testing, and integrate general and emergency departments to improve the performance of public health system. In this stage, China put out the cluster of epidemics that have occurred in several places one after another, and effectively controlled the spread of the epidemic in 2 to 3 incubation periods. In the stage of "dynamic zeroing", China emphasized the strategy of "grasping early, grasping the basics", focused on specific measures such as precise prevention in key areas. The rule of golden 24 hours was used to control the spread of the epidemic within one incubation period. During the epidemic, China continues to adopt active prevention and control strategies. This self-confidence and determination depends on adhering to the leadership of the Communist Party of China, the distinct essence of medical and health services, and significant advantages of social governance on health.
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Affiliation(s)
- L M Kong
- China Health Magazine, Beijing 100000, China
| | - L Zhang
- Health News Newspaper, Beijing 100000, China
| | - L J Ye
- Health News Newspaper, Beijing 100000, China
| | - J W Yang
- Health News Newspaper, Beijing 100000, China
| | - Y L Liu
- China Health Magazine, Beijing 100000, China
| | - S L Song
- China-Japan Friendship Hospital, Beijing 100029, China
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Li H, Yang P, Zhang EH, Kong LM, Meng CY. Antimicrobial ent-abietane-type diterpenoids from the roots of Euphorbia wallichii. J Asian Nat Prod Res 2021; 23:652-659. [PMID: 32406751 DOI: 10.1080/10286020.2020.1758931] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 04/17/2020] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
Three previously undescribed ent-abietane-type diterpenoids, designated as 11β-hydroxy-14-oxo-17-al-ent-abieta-8(9),13(15)-dien-16,12β-olide (1), 11β,17-dihydroxy-12-methoxy-ent-abieta-8(14),13(15)-dien-16,12ɑ-olide (2), and 14ɑ-hydroxy-17-al-ent-abieta-7(8),11(12),13(15)-trien-16,12-olide (3), were isolated from 95% ethanol extract of the roots of Euphorbia wallichii. The structures of the new compounds were elucidated by spectroscopic analysis (NMR, IR, UV, and MS). The isolated diterpenoids were tested in vitro for antimicrobial potentials against 6 pathogenic microorganisms. As a result, compounds 1-3 exhibited some antimicrobial activity against the tested Gram positive bacteria with minimum inhibitory concentration values less than 60 μg/ml.[Formula: see text].
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Affiliation(s)
- He Li
- Department of Clinical Laboratory, Division of Maolin, The 967th Hospital of Joint Logistic Support Force of PLA, Dalian 116041, China
| | - Peng Yang
- Department of Clinical Laboratory, Division of Shengli, The 967th Hospital of Joint Logistic Support Force of PLA, Dalian 116011, China
| | - En-Hui Zhang
- Department of Pharmacy, Division of Maolin, The 967th Hospital of Joint Logistic Support Force of PLA, Dalian 116041, China
| | - Ling-Man Kong
- Department of Burn and Plastic Surgery, Division of Shengli, The 967th Hospital of Joint Logistic Support Force of PLA, Dalian 116011, China
| | - Chun-Yuan Meng
- Department of Pharmacy, Division of Maolin, The 967th Hospital of Joint Logistic Support Force of PLA, Dalian 116041, China
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Abstract
This article aims to explore the expression and mechanism of miR-10a-5p in pancreatic cancer. MiR-10a-5p mimic, MiR-10a-5p inhibitor and negative control were transfected into human pancreatic cancer cell line SW1990. Real-time quantitative PCR technology was used to analyze the expression level of miR-10a-5p in pancreatic cancer tissues and cells. The proliferation, invasion and apoptosis of SW1990 cells in each group were detected by CCK-8 analysis, Transwell analysis, TUNEL method and flow cytometry. Targetscan7.2 was used to predict the target protein of MiR-10a-5p, and the expression of related proteins was detected by Western blot analysis. The results showed that the expression of miR- 10a-5p in cancer tissues of patients with pancreatic cancer was significantly higher than that in adjacent tissues (P <0.05). The expression of miR-10a-5p in cancer cells increased significantly, which could promote the proliferation and invasion of SW1990 cells and inhibit apoptosis (P <0.05). Overexpression of miR-10a-5p can regulate the expression of BDNF and SEMA4C. miR-10a-5p can promote the occurrence and development of pancreatic cancer by regulating the BDNF / SEMA4C pathway, and may become a molecular target for the diagnosis and treatment of pancreatic cancer in the future.
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Affiliation(s)
- X Fei
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - H Y Jin
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - Y Gao
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - L M Kong
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
| | - X D Tan
- Department of General Surgery, Shengjing Hospital of China Medical University, Shenyang, China
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Kong LM, Zeng JY, Zheng WB, Shen ZW, Wu RH. Effects of Acute Alcohol Consumption on the Human Brain: Diffusional Kurtosis Imaging and Arterial Spin-Labeling Study. AJNR Am J Neuroradiol 2019; 40:641-647. [PMID: 30872417 DOI: 10.3174/ajnr.a5992] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2018] [Accepted: 01/22/2019] [Indexed: 01/15/2023]
Abstract
BACKGROUND AND PURPOSE Brain function and microstructure are affected by alcohol consumption. Until recently, the effect of alcohol on neural mechanisms has not been fully elucidated. Our aim was to explore the acute effects of alcohol on healthy human brains by diffusional kurtosis imaging and 3D arterial spin-labeling and elucidate structural and functional changes in the brain on acute alcohol intake. MATERIALS AND METHODS Conventional MR imaging, diffusional kurtosis imaging, and 3D arterial spin-labeling were performed on 24 healthy volunteers before and 0.5 and 1 hour after drinking alcohol. Participants were divided into 2 groups according to the response to alcohol: blushing (n = 12) and unblushing (n = 12) groups. Twenty brain regions were analyzed. RESULTS Diffusional kurtosis imaging revealed an increase in mean kurtosis and fractional anisotropy at 0.5 hour post-alcohol intake in most brain regions, whereas mean diffusion was decreased in several brain regions at 1 hour after drinking. 3D arterial spin-labeling showed increased cerebral blood flow in most brain regions, particularly in the frontal regions. However, perfusion in the anterior commissure decreased. Regional changes in the brain correlated with various behavioral performances with respect to blush response and sex. In general, blushing individuals and men are more sensitive to alcohol with acute effects. CONCLUSIONS Physiologic and microstructural alterations in the brain on alcohol consumption were examined. Brain areas with blood flow alteration detected by 3D arterial spin-labeling were highly consistent with susceptible areas detected by diffusional kurtosis imaging. The current study provides new insight into the effects of alcohol on the brain and behavioral performance in different blush response and sex populations.
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Affiliation(s)
- L M Kong
- From the Department of Radiology (L.M.K., J.Y.Z., W.B.Z., Z.W.S., R.H.W.), the Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - J Y Zeng
- From the Department of Radiology (L.M.K., J.Y.Z., W.B.Z., Z.W.S., R.H.W.), the Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - W B Zheng
- From the Department of Radiology (L.M.K., J.Y.Z., W.B.Z., Z.W.S., R.H.W.), the Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - Z W Shen
- From the Department of Radiology (L.M.K., J.Y.Z., W.B.Z., Z.W.S., R.H.W.), the Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
| | - R H Wu
- From the Department of Radiology (L.M.K., J.Y.Z., W.B.Z., Z.W.S., R.H.W.), the Second Affiliated Hospital, Medical College of Shantou University, Shantou, China .,China Provincial Key Laboratory of Medical Molecular Imaging (R.H.W.), Guangdong, Shantou, China
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Kong LM, Fok KC, Tsui A, Qian C, Fisher L. Peripheral T-cell lymphoma mimicking 5-aminosalicylate hypersensitivity in ulcerative colitis. Intern Med J 2014; 43:1137-40. [PMID: 24134170 DOI: 10.1111/imj.12240] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 07/03/2013] [Indexed: 01/20/2023]
Abstract
5-aminosalicylates (5-ASA) remain an important strategy in the induction and maintenance of remission of inflammatory bowel diseases especially in ulcerative colitis. The prototypical drug of this class, sulfasalazine is generally well tolerated with severe hypersensitivity reactions and hepatotoxicity also described within the literature. When approaching a patient with an adverse reaction to 5-ASA, it can be difficult to differentiate clinically between a sulfa allergy versus a 5-ASA allergy versus a malignancy. We report on a case with initial signs and symptoms suggestive of a sulfa/5-ASA allergy that was subsequently found to be malignant in nature.
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Affiliation(s)
- L M Kong
- Department of Gastroenterology, Frankston Hospital, Frankston, Victoria, Australia
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Kong LM, Xu SY, Hu HH, Zhou H, Jiang HD, Yu LS, Zeng S. Identification of CYP2C19 inhibitors from phytochemicals using the recombinant human enzyme model. Pharmazie 2014; 69:362-366. [PMID: 24855828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The aim of the present study was to develop the recombinant insect cell-expressed protein as an in vitro model for inhibitors screening for human cytochrome P450 2C19 (CYP2C19), and to use the model to investigate the inhibition effect of three phytochemicals on CYP2C19 in vitro. Omeprazole was applied as the probe substrate. The estimated inhibitory constant (K(i)) of ticlopidine and fluvoxamine were 0.64 +/- 0.025 microM and 0.29 +/- 0.090 microM, respectively. After co-incubation with ticlopidine or fluvoxamine, the mean omeprazole Michaelis-Menten constant (K(m)) increased from 4.99 +/- 0.22 microM to 16.25 +/- 1.22 microM or 19.20 +/- 1.73 microM, respectively, while omeprazole's mean V(max) did not vary much. Both ticlopidine and fluvoxamine were competitive inhibitors of CYP2C19. The IC50 of three phytochemicals, isoalantolactone, curcumol and schisandrin A was determined as 38.91 microM, 121.0 microM and 86.41 microM, and the K(i) as 5.02 +/- 1.04 microM, 35.84 +/- 8.95 microM, and 4.46 +/- 0.017 microM, respectively. The in vitro model for inhibitor screening established using recombinant CYP2C19 could be used to assess the inhibition potential of drug candidates. Isoalantolactone and schisandrin A are potent inhibitors of CYP2C19, while curcumol is a moderate potent inhibitor of CYP2C19.
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Kong LM, Qian MR, Hu HH, Xu SY, Yu LS, Jiang HD, Chen SQ, Zeng S. Comparison of catalytical activity and stereoselectivity between the recombinant human cytochrome P450 2D6.1 and 2D6.10. Pharmazie 2012; 67:440-447. [PMID: 22764579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Polymorphisms of the cytochrome P450 2D6 (CYP2D6) gene play a major role in pharmacokinetic variability in human, while CYP2D6*10 is an important subtype in Asian people. In this study, the co-expression enzyme of human recombinant CYPOR, CYPb5 and CYP2D6.1 or CYP2D6.10 with the Bac-to-Bac system in baculovirus-infected insect cells was used to study the catalytical activity to imipramine metabolism and stereoselective metabolism of propranolol. The metabolites of imipramine were identified of hydroxyl imipramine and desipramine by LC-MS/MS. There are some differences between CYP2D6.1 and CYP2D6.10 activity. The kinetics parameters K(m), V(max), and CL(int) are 11.77 +/- 0.91 micromol/L, 0.4235 +/- 0.05 nmol/nmol CYP2D6.1/min and 3.60 x 10(-5) ml/min/nmol CYP2D6.1 (n = 3) for CYP2D6.1, respectively, and 9.05 +/- 0.87 micromol/L, 0.42 +/- 0.03 nmol/nmol CYP2D6.10/min, and 4.60 x 10(-5) ml/min/nmol CYP2D6.10 (n = 3) for CYP2D6.10. For propranolol, two metabolites were identified to be hydroxyl and N-desisopropylation propranolol by LC-MS/MS. When the substrate concentration was 0.20 micromol/L, CYP2D6.1 and CYP2D6.10 exhibited significant stereoseletivity. Furthermore, enantioselective formation has been detected. Both of CYP2D6.1 and CYP2D6.10 produced more hydroxyl propranolol from the R-(+)-isomer than from the S-(-)-isomer while there was no obvious difference for N-desisopropylation propranolol production between R-(+)- and S-(-)- isomer. In summary, there is a somewhat different catalytical activity and stereoselectivity between the human recombinant CYP2D6.1 and CYP2D6.10. The data we got will be helpful in preclinical research and clinical use of CYP2D6 substrates.
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Affiliation(s)
- L M Kong
- College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, PR China
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Abstract
BACKGROUND AND PURPOSE DTI can provide information about brain ultrastructure by quantifying water diffusion. Our objective was to assess the value of DTI in detecting the acute effects of alcohol on healthy human brains. MATERIALS AND METHODS Sixteen healthy volunteers were studied with conventional MR imaging and DTI before and 0.5, 1, 2, and 3 hours after the initiation of acute alcohol administration. Two DTI parameters, FA and ADC, were measured in the frontal lobe, internal capsule, external capsule, precentral gyrus, postcentral gyrus, thalamus, middle cerebellar peduncle, and brain stem. BrACs were measured at each time point after drinking to estimate BACs. RESULTS No abnormalities were found by conventional MR imaging at any time point in all subjects. ADC values of the frontal lobe, thalamus, and middle cerebellar peduncle were significantly reduced, reaching a minimum value at 1 or 2 hours, and FA values of the frontal lobe were significantly increased, reaching a maximal value at 0.5 hour in both doses. BrAC (BAC) was significantly increased to reach a peak at 0.5 hour in both doses and decreased gradually. CONCLUSIONS DTI can detect changes in brains after acute alcohol consumption that are not detectable by conventional MR imaging. The frontal lobe, thalamus, and middle cerebellar peduncle are more vulnerable to the effects of acute alcohol consumption. DTI is more effective than BrAC or BAC for the detection of alcohol-induced changes on the human brain.
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Affiliation(s)
- L M Kong
- Department of Radiology, Second Affiliated Hospital, Medical College of Shantou University, Shantou, China
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Yu FP, Yuan DR, Kong LM, Duan XL, Guo SY, Wang XQ, Zhao X. Fluorescence properties of Dy(3+) doped La(3)Ga(5.5)Nb(0.5)O(14) nanocrystals. Nanotechnology 2008; 19:045705. [PMID: 21817522 DOI: 10.1088/0957-4484/19/04/045705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effects of Dy(3+) doping concentration and calcinations on the fluorescence properties of La(3)Ga(5.5)Nb(0.5)O(14) (Dy:LGN) nanocrystals were examined for the first time. High quality Dy:LGN nanocrystals were synthesized by the sol-gel method. The room temperature fluorescence spectra were measured; they showed a yellow emission, which can be attributed to the (4)F(9/2)-(6)H(13/2) transition. The relationship between the relative emission intensity and the doping concentration of the specimens, sintered at different temperatures, is consistent with a Gaussian distribution according a fitted and modified formula. The optimum value of the Dy(3+) doping concentration in LGN nanocrystals is in the range 2.0-2.5%. Moreover, in LGN bulk crystal for laser use, the optimum value, calculated through the obtained formula, is presumed in the range 1.5-2.0%. The fluorescent lifetime of a 2.0% Dy:LGN nanocrystal is quite short, only about 8.5 ns.
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Affiliation(s)
- F P Yu
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
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Qian XL, Zhang RD, Kong LM, Zhang HZ. [The specific inhibitory effect of cancer serum on mouse lymphocyte SCM reaction]. Shi Yan Sheng Wu Xue Bao 1987; 20:171-7. [PMID: 3660987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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