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Moazzam Z, Ziogas IA, Wu WK, Rauf MA, Pai AK, Hafberg ET, Gillis LA, Izzy M, Matsuoka LK, Alexopoulos SP. Delay in liver transplantation referral for adolescents with biliary atresia transitioning to adult care: a slippery slope. Br J Surg 2021; 108:e324-e325. [PMID: 34227648 DOI: 10.1093/bjs/znab209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Accepted: 05/12/2021] [Indexed: 11/13/2022]
Abstract
We compared the waitlist mortality of 114 adolescent (12–17 years) and 217 adult (≥ 18 years) biliary atresia candidates, and the post-transplant survival of 117 adolescent and 160 adult biliary atresia liver transplant recipients using Scientific Registry of Transplant Recipients data (2002-2018). After adjusting for Model for End-stage Liver Disease score (P = 0.001) and ascites, portal vein thrombosis, encephalopathy, life support at listing (all P ≥ 0.09), adults demonstrated 10.9 times higher risk of waitlist mortality vs. adolescents (95 per cent c.i. 1.55 to 76.46; P = 0.02). Adolescents exhibited superior patient (P = 0.007) and graft survival (P = 0.006).
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Affiliation(s)
- Z Moazzam
- Medical College, Aga Khan University Hospital, Karachi, Pakistan
| | - I A Ziogas
- Department of Surgery, Division of Hepatobiliary Surgery and Liver Transplantation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - W K Wu
- Department of Surgery, Division of Hepatobiliary Surgery and Liver Transplantation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M A Rauf
- Department of Surgery, Division of Hepatobiliary Surgery and Liver Transplantation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - A K Pai
- Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - E T Hafberg
- Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - L A Gillis
- Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - M Izzy
- Department of Medicine, Division of Gastroenterology, Hepatology, and Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - L K Matsuoka
- Department of Surgery, Division of Hepatobiliary Surgery and Liver Transplantation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - S P Alexopoulos
- Department of Surgery, Division of Hepatobiliary Surgery and Liver Transplantation, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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Dou LJ, Zhang QF, Bao HH, Wu WK, Sheng J, Yan SQ, Xu YY, Gu CL, Huang K, Cao H, Su PY, Tao FB, Hao JH. [A birth cohort study of the association between prenatal serum bisphenol A concentration and infant neurobehavior development]. Zhonghua Yu Fang Yi Xue Za Zhi 2020; 54:644-650. [PMID: 32842280 DOI: 10.3760/cma.j.cn112150-20190902-00696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the association between maternal bisphenol A (BPA) exposure during pregnancy and neurobehavioral development in infant. Methods: Participants were from the Ma'anshan Birth Cohort, which was established from October 2008 to October 2010 based on four municipal medical and health institutions in Ma'anshan. High-performance liquid chromatography-tandem mass spectrometry was applied for the determination of serum BPA concentration in 1 783 pregnant women sampled at their first filing, and during 2.97 to 28.1 months age of the infants. Neurobehavioral development were assessed by 0-6-year-old pediatric examination table of neuropsychological development. Generalized linear model was used to analyze the association between serum BPA levels during pregnancy and infants' neurobehavioral development. Results: A total of 931 mother-child pairs had complete data on serum BPA detection during pregnancy and assessment of infants' neurobehavioral development status. The age of pregnant women at their first filing was (26.67±3.45) years old, and the M (P25,P75) of serum BPA concentration (ng/ml) was 0.23 (0.11, 0.52), with a detection rate of 84.1% (783/931). The age of infants was (13.18±5.46) months, and 53.5% (498) were boys. The developmental quotient scores of large motor, fine motor, adaptive ability, language ability and social behaviors of infants were (97.88±16.32), (97.16±15.35), (99.64±15.47), (95.3±16.04) and (98.95±14.76) points, respectively. Generalized linear model showed that after adjusting for factors such as delivery mode, feeding mode, family per capita monthly income, preterm delivery, gender, maternal age, residence, pre-pregnancy body mass index and residence time, serum BPA level in pregnancy was negatively associated with infant's development of social behavior [β (95%CI):-2.42 (-4.71, -0.12)]. The post-stratification analysis by infant age revealed that the serum BPA level in pregnancy was only negatively associated with the development of language and social behavior developmental quotient scores in infants between the ages of 12 and 18 months, with β (95%CI) about -6.66 (-13.06, -0.25) and -7.401 (-12.97, -1.83), respectively. Conclusion: BPA exposure during pregnancy affects language and social behavior development in infants, and the detection window is between 12 and 18 months old of the infant.
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Affiliation(s)
- L J Dou
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - Q F Zhang
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - H H Bao
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - W K Wu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - J Sheng
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - S Q Yan
- Department of Child Health Care, Maternal and Child Health Care Center of Ma'anshan, Ma'anshan 243000, Anhui Province, China
| | - Y Y Xu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - C L Gu
- Department of Child Health Care, Maternal and Child Health Care Center of Ma'anshan, Ma'anshan 243000, Anhui Province, China
| | - K Huang
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - H Cao
- Department of Child Health Care, Maternal and Child Health Care Center of Ma'anshan, Ma'anshan 243000, Anhui Province, China
| | - P Y Su
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - F B Tao
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
| | - J H Hao
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University/Ministry of Education Key Laboratory of Health of New-born Population, Hefei 230032, China
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Zhang QF, Bao HH, Wu WK, Yan SQ, Sheng J, Xu YY, Gu CL, Huang K, Zhu P, Cao H, Su PY, Tao FB, Hao JH. [Association between early pregnancy bisphenol A exposure and sleep problems among preschool children]. Zhonghua Yu Fang Yi Xue Za Zhi 2018; 52:1018-1022. [PMID: 30392320 DOI: 10.3760/cma.j.issn.0253-9624.2018.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the association between maternal bisphenol A exposure during early pregnancy and sleep problems among preschool children. Methods: Research subjects were from one of the sub-cohorts(Ma'anshan Cohort) of the China-Anhui Birth Cohort Study (C-ABCS) in Ma'anshan city. The basic situation of pregnant women and sleep information of preschool children were investigated. We selected preschool children whose mother's maternal serum bisphenol A concentrations of the first trimester had been already detected between December 2012 to Januray 2014. 1 259 pairs of mothers and children were included. The concentrations of bisphenol A exposure during early pregnancy were divided into low, medium and high exposure groups according to 25(th) percentile (P(25)) and 75(th) percentile (P(75)) levels. Multivariate multinomial logistic regression model was used to analyze the association between maternal bisphenol A exposure during early pregnancy and sleep-related problems in preschool children. Results: The P(50) (P(25)-P(75)) of serum bisphenol A exposure level during early pregnancy was 0.231 (0.106-0.512) ng/ml. The sleep-related problems scores of 1 259 preschool children were (16.43±3.82) points. The occasional sleep-related problems were detected about 47.8% (602 cases) and frequent sleep-related problems were detected about 18.3% (230 cases). After the adjustment of the confounding factors such as children's gender, age, BMI, sleep position (lying down, sleeping on one's back), the length of time to sleep and the length of sleep at night, in comparison with bisphenol A low exposure group, the OR (95%CI) value of preschool children with occasional sleep-related problems in maternal bisphenol A high exposure group during early pregnancy was 1.44 (1.01-2.06). After the gender stratification, the results showed that in comparison with bisphenol A low exposure group, the OR (95%CI) value of preschool girls with occasional sleep-related problems in maternal bisphenol A medium and high exposure group during early pregnancy were 1.61 (1.05-2.46) and 2.40 (1.42-4.04), respectively. The OR (95%CI) value of preschool girls with frequent sleep-related problems in maternal bisphenol A high exposure group during early pregnancy was 2.64 (1.34-5.17). However, in boys, there was no statistically significant association between maternal bisphenol A exposure during early pregnancy and sleep-related problems (P>0.05). Conclusion: Maternal bisphenol A exposure during early pregnancy might be related to sleep-related problems in preschool children.
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Affiliation(s)
- Q F Zhang
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University; Anhui Provincial Key Laboratory of Population Health and Aristogenics, Hefei 230032, China
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Cho CH, Yu J, Wu WK. Identification of pathogenic microRNAs in Helicobacter pylori-associated gastric cancer using a combined approach of animal study and clinical sample analysis. Hong Kong Med J 2016; 22 Suppl 6:13-18. [PMID: 27807311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023] Open
Affiliation(s)
- C H Cho
- School of Biomedical Sciences, The Chinese University of Hong Kong
- Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong
| | - J Yu
- Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong
| | - W Kk Wu
- Institute of Digestive Disease, Faculty of Medicine, The Chinese University of Hong Kong
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Wu WK, Liang CK, Huang JZ. MEMS-based flow cytometry: microfluidics-based cell identification system by fluorescent imaging. Conf Proc IEEE Eng Med Biol Soc 2007; 2004:2579-81. [PMID: 17270801 DOI: 10.1109/iembs.2004.1403741] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
This study utilizes MEMS technology to realize a novel low-cost microfluidics-based biochip system for flow-type cell handling. Powered by vacuum pump, the microfluidic driving system enables cells to move in order one by one in the biochip by an effect of sheath flow prefocus. Then, cells are guided to a fluorescent inspection region where two detection tasks such as cell image identification and cell counting are conducted. Currently, the glass-based biochip has been manufactured and all the related devices have been well set up in our laboratory. With this proposed prototype system, typical results about cell separation of yeast cell and PC-3 cell are available and their separated images are also presented, respectively.
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Affiliation(s)
- W K Wu
- Dept. of Electr. Eng., Southern Taiwan Univ. of Tech., Taipei, Taiwan
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Wu WK, Mak CH, Ko RC. Cloning and characterization of the Cu/Zn superoxide dismutase of Trichinella pseudospiralis. Parasitol Res 2005; 98:281-7. [PMID: 16341881 DOI: 10.1007/s00436-005-0056-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2005] [Accepted: 09/28/2005] [Indexed: 10/25/2022]
Abstract
Copper/zinc (Cu/Zn) superoxide dismutase (SOD) activity was identified for the first time in both crude somatic extracts (CE) and excretory/secretory (E/S) products of Trichinella pseudospiralis. It was the dominant SOD in infective-stage larvae. Native polyacrylamide gel electrophoresis of CE and E/S products yielded a prominent band, which was cyanide-sensitive and was partly inhibited by hydrogen peroxide in SOD assay. Cytosolic Cu/Zn SOD was cloned. The 471-bp full-length cDNA sequence contained an open reading frame of 157 amino acids. The gene contained three introns. Quantitative reverse transcription-polymerase chain reaction indicated that the expression of cytosolic Cu/Zn SOD was substantially higher in infective-stage larvae than in adult worms. Cluster analysis showed that the sequence of the Cu/Zn SOD of T. pseudospiralis, an adenophorean nematode, is related to those of Brugia pahangi, Acanthocheilonema viteae, Onchocerca volvulus, and Haemonchus contortus (all belonging to the sercenentean group).
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Affiliation(s)
- W K Wu
- Department of Zoology, The University of Hong Kong, Pokfulam, Hong Kong, SAR, China
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Abstract
OBJECTIVE To describe a patient who developed a Descemet membrane detachment after hydrogen peroxide injury with successful reattachment by intracameral injection of sulfur hexafluoride gas. METHODS Case report. RESULTS The right eye of a 40-year-old man was exposed to 35% hydrogen peroxide. This resulted in a central corneal epithelial defect, corneal edema, a localized detachment of Descemet membrane, and a gas bubble between the posterior corneal stroma and Descemet membrane. The Descemet membrane detachment persisted after reabsorption of the gas bubble. Successful reattachment of Descemet membrane was achieved with injection of 0.15 mL of 20% sulfur hexafluoride gas into the anterior chamber. CONCLUSION Hydrogen peroxide ocular injury may cause Descemet membrane detachment, and successful reattachment may be achieved with intracameral injection of 20% sulfur hexafluoride gas.
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Affiliation(s)
- Hunter K L Yuen
- Department of Ophthalmology & Visual Sciences, The Chinese University of Hong Kong, and Hospital Authority Ophthalmic Services, Hong Kong Eye Hospital, Kowloon, Hong Kong, People's Republic of China
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Yim TK, Wu WK, Pak WF, Ko KM. Hepatoprotective action of an oleanolic acid-enriched extract of Ligustrum lucidum fruits is mediated through an enhancement on hepatic glutathione regeneration capacity in mice. Phytother Res 2001; 15:589-92. [PMID: 11746839 DOI: 10.1002/ptr.878] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The fruits of Ligustrum lucidum Ait. (FLL) were fractionated into petroleum ether (FLL-Pe), chloroform (FLL-Ch), butanol (FLL-Bu) and aqueous (FLL-Aq) fractions, of which FLL-Ch and FLL-Bu were found to be enriched with oleanolic acid (OLA). The in vivo antioxidant activities of various FLL fractions and OLA were assessed by examining the effect on carbon tetrachloride (CCl(4))-induced hepatotoxicity in mice. Pretreatment of animals with various FLL fractions could protect against CCl(4)-induced hepatotoxicity to a varying degree, with OLA-enriched FLL-Bu and FLL-Ch being more potent. However, a mortality rate of 60% was observed in the FLL-Ch pretreated and CCl(4)-intoxicated mice. OLA pretreatment also produced a dose-dependent protection against CCl(4) hepatotoxicity. The hepatoprotection afforded by FLL-Bu or OLA pretreatment was associated with an enhancement of hepatic-glutathione regeneration capacity (GRC). In contrast, the inability of FLL-Aq pretreatment to enhance hepatic GRC resulted in a failure to prevent CCl(4)-induced hepatic injury. The results suggest that the hepatoprotective action afforded by OLA-enriched FLL-Bu or OLA pretreatment may be mainly mediated by the enhancement of hepatic GRC, particularly under conditions of CCl(4)-induced oxidative stress.
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Affiliation(s)
- T K Yim
- Department of Biochemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
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Liu XA, Wu WK. [Researches on prevention and treatment of reperfusion injury in cerebral ischemia by Chinese herbal medicine]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:794-6. [PMID: 12575615] [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: 02/28/2023]
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10
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Wu WK, Su JW, Lin SG. [Clinical study on effect of sini decoction on ischemia/reperfusion injury by Holter monitoring in patients with acute myocardial infarction treated with thrombolytic therapy]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:744-6. [PMID: 12575606] [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: 02/28/2023]
Abstract
OBJECTIVE To observe the clinical effect of Sini Decoction (SND) on ischemia/reperfusion injury in acute myocardial infarction (AMI). METHODS Randomized case-control clinical trial was conducted to observe the change of Holter monitoring in 22 cases of AMI treated with thrombolytic therapy before and after treatment. RESULTS The lasting time of acute ST segment, total burden of myocardial infarction, QRS score, QT dispersion and occurrence of reperfusion arrhythmia in patients received SND treatment were lower than those untreated with SND (P < 0.05). CONCLUSION SND is helpful in improving reperfusion injury of thrombolytic therapy in AMI patients.
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Affiliation(s)
- W K Wu
- Institute of Integrated Traditional Chinese and Western Medicine, Sun Yat-sen University of Medical Sciences, Guangzhou 510089
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Tang TJ, Wu WK, Lu HP. [Mechanism of sini decoction in regulating beta-adrenergic receptor signal transduction in rats with myocardial ischemia]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2001; 21:206-8. [PMID: 12577340] [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: 02/28/2023]
Abstract
OBJECTIVE To investigate the effect of Sini Decoction (SND) on beta-adrenergic receptor (beta-AR) signal transduction in rats with myocardial ischemia. METHODS After beta-AR had been blocked by propranolol, the myocardial ischemia rats were established by pituitrin injection. The density of beta-AR in myocardial cell membrane was determined by radioligand binding assay, cAMP level in plasma and myocardial tissue was detected by radioimmunoassay (RIA), and the mRNA expression of beta 1-AR and beta 1-AR kinase (beta ARK-1) was measured by quantitative reverse transcriptase polymerase chain reaction (RT-PCR) amplifying assay. RESULTS In myocardial ischemia group, the density of beta 1-AR was up-regulated and the mRNA expression of beta ARK-1 increased (P < 0.01), but the cAMP level in plasma and myocardium was lower than that in the normal group (P < 0.01 and P < 0.05). SND could promote beta 1-AR mRNA expression and inhibit beta ARK-1 mRNA expression so as to increase the density of beta-AR and cause significant raising of cAMP level in plasma and myocardium. CONCLUSION SND could reduce the desensitization of beta 1-AR during myocardial ischemia and improve signal transduction of beta-AR.
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MESH Headings
- Animals
- Drugs, Chinese Herbal/pharmacology
- Female
- Male
- Myocardial Ischemia/chemically induced
- Myocardial Ischemia/metabolism
- Pituitary Hormones, Posterior
- RNA, Messenger/genetics
- Random Allocation
- Rats
- Rats, Wistar
- Receptors, Adrenergic, beta-2/biosynthesis
- Receptors, Adrenergic, beta-2/genetics
- Receptors, Adrenergic, beta-2/physiology
- Signal Transduction
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Affiliation(s)
- T J Tang
- Institute of Integrated Traditional Chinese and Western Medicine, Sun Yat-sen University of Medical Sciences, Guangzhou 510089
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Yim TK, Wu WK, Pak WF, Mak DH, Liang SM, Ko KM. Myocardial protection against ischaemia-reperfusion injury by a Polygonum multiflorum extract supplemented 'Dang-Gui decoction for enriching blood', a compound formulation, ex vivo. Phytother Res 2000; 14:195-9. [PMID: 10815014 DOI: 10.1002/(sici)1099-1573(200005)14:3<195::aid-ptr629>3.0.co;2-4] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
'Dang-Gui Decoction for Enriching the Blood' (BE), a traditional Chinese formulation comprising Angelica sinensis and Astragalus membranaceus, is used for stimulating red blood cell production as well as enhancing cardiovascular function. In the present study, we have demonstrated the myocardial protection afforded by BE pretreatment against ischaemia-reperfusion (IR) injury in isolated-perfused rat hearts. A more complete and potent myocardial protection against IR injury was also shown by a Polygonum multiflorum extract supplemented BE preparation (BEA). The results suggest that the more potent cardioprotective action of BEA may be related to its ability to sustain the myocardial glutathione antioxidant status under conditions of IR-induced oxidative stress, which may possibly in turn result from the synergistic interaction between the BE and Polygonum extract.
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Affiliation(s)
- T K Yim
- Department of Biochemistry, The Hong Kong University of Science & Technology, Clear Water Bay, Hong Kong, China
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Yim TK, Wu WK, Mak DH, Ko KM. Myocardial protective effect of an anthraquinone-containing extract of Polygonum multiflorum ex vivo. Planta Med 1998; 64:607-611. [PMID: 9810265 DOI: 10.1055/s-2006-957531] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
An ethyl acetate extract of Polygonum multiflorum Thunb. (PME) was fractionated into an anthraquinone-containing (PME-I) and a non-anthraquinone-containing (PME-II) fraction. The effects of PME and its related extracts pretreatment on myocardial ischemia-reperfusion (IR) injury in isolated perfused rat hearts were examined. Pretreatment with PME extract or its anthraquinone-containing fraction produced a dose-dependent protection against myocardial IR injury, as evidenced by a significant decrease in the extent of LDH leakage as well as an improvement in contractile force recovery. The myocardial protection was found to be associated with an enhancement in myocardial glutathione antioxidant status, as indicated by significant reductions in both the extent of IR-induced reduced glutathione (GSH) depletion and inhibition of Se-glutathione peroxidase (GPX) and glutathione reductase (GRD) activities. Both alpha-tocopherol acetate (VE) and emodin (EMD) pretreatments protected against IR-induced myocardial injury as assessed by the decrease in the extent of LDH leakage. But the contractile force recovery of the ischemic-reperfused hearts prepared from VE or EMD pretreated animals was not improved. The more complete myocardial protection afforded by the anthraquinone-containing fraction of PME extract may be related to its ability to sustain the glutathione antioxidant status under the condition of IR-induced oxidative stress.
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Affiliation(s)
- T K Yim
- Department of Biochemistry, Hong Kong University of Science & Technology, Clear Water Bay, China
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Xie QJ, Hou C, Wu WK. [Study on platelet-derived growth factor mRNA and copper-zinc superoxide dismutase mRNA expression changes of aortic artery endothelium with restenosis after aortic artery dilatation treated with buyang huanwu decoction]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1997; 17:611-3. [PMID: 10322893] [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: 02/12/2023]
Abstract
OBJECTIVE To study on dynamic mechanism of restenosis after PTCA treated with Buyang Huanwu Decoction (BYHWD). METHODS Twenty-eight male New Zealand rabbits with mimic restenosis after aortic artery dilatation were detected by prime in situ labeling in aortic endothelium. The items included gene expression of copper zinc superoxide dismutase (SOD-1) and platelet-derived growth factor receptor (PDGFR) mRNA to analyse dynamic mechanism of restenosis. RESULTS Seven days after aortic artery dilatation, PDGFR mRNA of aortic endothelium decreased clearly. The comparison between experimental and the control group showed significant difference (P < 0.05). By the same condition, the gene expression of SOD-1 was increasing, which showed a significant difference with the control group (P < 0.05). CONCLUSIONS BYHWD increased SOD-1 gene expression of artery endothelium, to improve oxygen feed for ischemia reperfusion in the same way, BYHWD suppressed PDGFR mRNA expression to control cellular pathological proliferation.
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Affiliation(s)
- Q J Xie
- Sun Yat-sen University of Medical Sciences, Guangzhou
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Su JW, Wu WK, Lin SG. [Improvement of sini decoction on hemorheology following percutaneous transluminal coronary angioplasty]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1997; 17:345-7. [PMID: 9863128] [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: 02/09/2023]
Abstract
OBJECTIVE To study the hemorheological effects of Sini decoction on patients following percutaneous transluminal coronary angioplasty (PTCA). METHODS Forty-six patients were randomly divided into Sini decoction and control groups. The hemorheologic variables were determined before and after Sini decoction treatment. RESULTS No hemorheologic changes were observed in the patients (n = 23) only with PTCA, but the patients (n = 23) with Sini decoction were found to be significantly decreased in whole blood viscosity and red cell aggregation and dredging the blood of microcirculation as post-PTCA compared to pre-PTCA. CONCLUSION Sini decoction could improve the patient's hemorheology.
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Affiliation(s)
- J W Su
- Guangdong Cardiovascular Institute, Guangzhou
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Springer B, Wu WK, Bodmer T, Haase G, Pfyffer GE, Kroppenstedt RM, Schröder KH, Emler S, Kilburn JO, Kirschner P, Telenti A, Coyle MB, Böttger EC. Isolation and characterization of a unique group of slowly growing mycobacteria: description of Mycobacterium lentiflavum sp. nov. J Clin Microbiol 1996; 34:1100-7. [PMID: 8727884 PMCID: PMC228963 DOI: 10.1128/jcm.34.5.1100-1107.1996] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
A distinct group of slowly growing mycobacteria was identified on the basis of growth characteristics, biochemical and lipid profiles, and nucleic acid analyses. The isolates showed growth at 22 to 37 degrees C, yellow pigmentation, and negative tests for Tween 80 hydrolysis, nicotinic acid, nitrate reductase, and urease; tests for arylsulfatase, pyrazinamidase, and heat-stable catalase were variable. Analysis of cellular fatty acids by gas-liquid chromatography and mycolic acids by thin-layer chromatography and high-performance liquid chromatography indicated a distinctive pattern which was unlike those of other species. Determination of the 16S rRNA gene sequence showed a unique sequence closely related to Mycobacterium simiae and M. genavense. On the basis of DNA homology studies, we suggest that these organisms are representatives of a novel species, for which the name M. lentiflavum sp. nov. is proposed.
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Affiliation(s)
- B Springer
- Institut für Medizinische Mikrobiologie, Medizinische Hochschule Hannover, Germany
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Yi HZ, Wu WK, Hou C. [Progress on research in preventing and treating the myocardial ischemia/reperfussion injury with Chinese herb medicine]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1995; 15:509-11. [PMID: 8580700] [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: 01/31/2023]
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Liu SY, Wu WK, Wang JY, Son LM, Yen MH, Lin CC. Studies on the agronomic characteristics, yield, and saikosaponin content of two Bupleurum species in Taiwan. Am J Chin Med 1995; 23:181-94. [PMID: 7572780 DOI: 10.1142/s0192415x95000249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Two Bupleurum species (Bupleurums spp.), i.e., B. falcatum L. cv. Tainung No. 1 and B. kaoi Liu, Chao, et Chuang, were compared for their differences in seed germination, plant characteristics and root yield, and saikosaponin content. Experimental data showed that the most suitable temperature for seed germination of the two species was 16 degrees C. Two treatments, cold stratification at 4 degrees C for 8 weeks and presoaking by running water for 2 days, resulted in higher germination rates. Tainung No. 1 possessed a higher 1,000-seed weight than B. kaoi. However, field survival rate was higher for B. kaoi than for Tainung No.1. Results from field experiments also revealed that stem diameter, leaf width and fresh weight of various plant parts except the root were superior for Tainung No. 1 to B. kaoi. On the contrary, tiller number and root diameter and weight of B. kaoi were higher than those of Tainung No. 1. Harvest data and elevation had significant effects on the agronomic performance of the two Bupleurum spp. Measurements of most traits of the 6 month-old plants were superior to those of the 3 and 10 month-old plants. Cultivation at higher elevation (850 m) favored the development of leaf weight and root length, while cultivation at lower elevation (85 m) facilitated the development of plant height, root diameter, and root weight. Analysis of saikosaponin concentration in the root tissue revealed that average contents of 3.19 and 3.80 mg/g, respectively, for plants grown at the elevations of 850 m and 85 m. Comparison between the two species showed no significant difference in saikosaponin content, ranging from 3.45 to 3.55 mg/g.
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Affiliation(s)
- S Y Liu
- Department of Agronomy, Taiwan Agricultural Research Institute, Taichung
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Wu WK, Hou C, Luo HC. [Mechanisms responsible for protective effect of Sini decoction on ischemic myocardium in mice]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1994; 14:549-50. [PMID: 7532484] [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: 01/25/2023]
Abstract
The possible mechanisms responsible for the protective effect of Sini decoction (SND) on the ischemic myocardium were studied on the mice model of pituitrin-induced myocardial ischemia in terms of free radical. Results indicated that SND significantly decreased the concentration of oxygen free radical and the content of malondialdehyde (MDA), increased nutritional blood flow and the activity of superoxide dismutase (SOD) in ischemic myocardium. These results suggested that three mechanisms whereby SND exerted its protective effects existed; improving the perfusion of ischemic myocardium, attenuating the injurious action of free radical and strengthening the free radical defense.
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Affiliation(s)
- W K Wu
- Sun Yat-sen University of Medical Sciences, Guangzhou
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Cummings LA, Wu WK, Larson AM, Gavin SE, Fine JS, Coyle MB. Effects of media, atmosphere, and incubation time on colonial morphology of Arcanobacterium haemolyticum. J Clin Microbiol 1993; 31:3223-6. [PMID: 8308114 PMCID: PMC266379 DOI: 10.1128/jcm.31.12.3223-3226.1993] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Arcanobacterium haemolyticum causes pharyngitis as well as skin and other wound infections. Although it is a beta-hemolytic organism, the hemolysis is less well defined than that of beta-hemolytic streptococci and may be overlooked in cultures with heavy growth of commensal throat flora. To determine whether routine throat culture conditions are sufficient to produce recognizable colonies of A. haemolyticum, the morphology of six distinct strains was studied after various combinations of incubation time, medium, and atmosphere. The agar media, containing 5% sheep blood, were Trypticase soy agar, Columbia agar, and heart infusion agar. Cultures were incubated in ambient air, 6 to 8% CO2, or an anaerobic atmosphere. Cultures were compared after 24, 48, and 72 h of incubation for colony size, clarity and size of hemolytic zone, and macroscopic evidence of agar pitting. A minimum of 48 h was needed for expression of beta-hemolysis and pitting. Trypticase soy agar was the superior medium and CO2 was the superior atmosphere for beta-hemolysis. Agar pitting was not significantly affected by variations in medium or atmosphere. Strains differed in their expression of hemolysis and production of pits at 48 h. After 72 h of incubation, beta-hemolysis and pitting were visible in over 96% of culture observations.
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Affiliation(s)
- L A Cummings
- Department of Laboratory Medicine, Harborview Medical Center, University of Washington, Seattle 98104
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Thomas RE, Wu WK, Verleye D, Rai KS. Midgut basal lamina thickness and dengue-1 virus dissemination rates in laboratory strains of Aedes albopictus (Diptera: Culicidae). J Med Entomol 1993; 30:326-331. [PMID: 8459409 DOI: 10.1093/jmedent/30.2.326] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Strain differences in midgut basal lamina thickness, assessed by measurement in transmission electron micrographs, and disseminated infection rates of dengue-1 virus were compared among three laboratory strains of Aedes albopictus (Skuse). Mean basal lamina thickness for the New Orleans and Houston strains were significantly greater than those for the Oahu strain, which exhibits a higher disseminated infection rate than the former two. Although basal lamina thickness among the F1 progeny of reciprocal crosses of the Oahu and Houston strains were intermediate between the parental strains, they were too variable to be useful as markers in genetic studies. Measurements of basal laminae among individuals of the New Orleans strain, with disseminated or nondisseminated infections, failed to demonstrate a role for basal lamina thickness as a modulator of dengue-1 virus dissemination across the midgut epithelium of Ae. albopictus.
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Affiliation(s)
- R E Thomas
- Department of Biological Sciences, University of Notre Dame, IN 46556
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Wu WK, Tesh RB. Genetic factors controlling susceptibility to Leishmania major infection in the sand fly Phlebotomus papatasi (Diptera: Psychodidae). Am J Trop Med Hyg 1990; 42:329-34. [PMID: 2331042 DOI: 10.4269/ajtmh.1990.42.329] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Studies of the genetic factors controlling Leishmania major infection in Phlebotomus papatasi were carried out using 2 different sand fly lines: one highly susceptible and the other refractory to the parasite. L. major infection rates in both F1 and F2 generations from reciprocal crosses and in backcrosses between the parent lines showed that susceptibility and refractoriness of Ph. papatasi to infection with L. major are controlled by less than 1 gene. Neither susceptibility nor refractoriness is dominant over the other.
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Affiliation(s)
- W K Wu
- Yale Arbovirus Research Unit, Yale University School of Medicine, New Haven, Connecticut
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Abstract
Variation in susceptibility to infection with cultured promastigotes of Leishmania major was detected among 3 different geographic strains (ISRAEL, EGYPT, and INDIA) of the sand fly Phlebotomus papatasi. The ISRAEL strain showed the greatest susceptibility and was chosen for subsequent genetic selection experiments. After 13 generations of genetic selection in this strain, a stable refractory line was obtained in which only 7.5% of the insects could be infected. A highly susceptible line was also obtained in 5 generations of selection. Infection rates in the susceptible line were stabilized at about 94%. A description of the selection process and characteristics of the 2 lines are given.
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Affiliation(s)
- W K Wu
- Yale Arbovirus Research Unit, Yale University School of Medicine, New Haven, Connecticut
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Wu WK, Hou C. [Electro-acupuncture at "zusanli" in the prevention of dexamethasone-induced atrophy of the adrenal cortex in rabbits]. Zhong Xi Yi Jie He Za Zhi 1988; 8:98-100, 70. [PMID: 3261645] [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: 01/04/2023]
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Wu WK, Kivelson S. Theory of conducting polymers with weak electron-electron interactions. Phys Rev B Condens Matter 1986; 33:8546-8557. [PMID: 9938252 DOI: 10.1103/physrevb.33.8546] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Abstract
Cryostat sections of 11 rejected human renal grafts were selected for positive results in immunofluorescence tests. Immune complexes were detected in glomerular basement membrane (9 cases), tubular basement membrane (3 cases), and vessels (5 cases). Preincubation of the sections with FII of pooled human serum, but not of rabbit serum, prevented the staining of immune complexes for human IgG. These findings were interpreted by the assumption that most complexes under study were produced by reaction of the patient's altered IgG with the rheumatoid-like factor of IgG variety.
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Lin C, Zhang TM, Wu WK, Cao SH, Wang DX, Yi MG. [Absorption, distribution and excretion of [3H]rubescensine A in mice]. Zhongguo Yao Li Xue Bao 1983; 4:57-60. [PMID: 6223502] [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: 01/19/2023]
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Bogedain W, Colina LA, Wu WK, Park UH. Sporotrichosis of the extremities. J Med Assoc Ga 1981; 70:442-444. [PMID: 7252382] [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: 05/21/2023]
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Wilkins RH, Wu WK. Spontaneous rupture of a metastatic brain tumor into the ventricular system. Report of two cases. J Neurosurg 1971; 34:412-6. [PMID: 5313337 DOI: 10.3171/jns.1971.34.3.0412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
✓ Two cases are reported in which spontaneous rupture of a metastatic brain tumor occurred into the ventricular system, leading to the dissemination of the tumor contents in the cerebrospinal fluid. The site of rupture was demonstrated by ventriculography in the first case and by surgical exposure in the second. These cases support the assumption that metastatic neoplasms within the brain may rupture into the ventricular system and spread via the cerebrospinal fluid pathways.
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Wu WK. Inborn metabolic errors of urea cycle. Va Med Mon (1918) 1967; 94:723-725. [PMID: 6063458] [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: 05/21/2023]
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