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1.
Commun Biol ; 6(1): 630, 2023 06 10.
Artigo em Inglês | MEDLINE | ID: mdl-37301948

RESUMO

Coral reefs in the Central Indo-Pacific region comprise some of the most diverse and yet threatened marine habitats. While reef monitoring has grown throughout the region in recent years, studies of coral reef benthic cover remain limited in spatial and temporal scales. Here, we analysed 24,365 reef surveys performed over 37 years at 1972 sites throughout East Asia by the Global Coral Reef Monitoring Network using Bayesian approaches. Our results show that overall coral cover at surveyed reefs has not declined as suggested in previous studies and compared to reef regions like the Caribbean. Concurrently, macroalgal cover has not increased, with no indications of phase shifts from coral to macroalgal dominance on reefs. Yet, models incorporating socio-economic and environmental variables reveal negative associations of coral cover with coastal urbanisation and sea surface temperature. The diversity of reef assemblages may have mitigated cover declines thus far, but climate change could threaten reef resilience. We recommend prioritisation of regionally coordinated, locally collaborative long-term studies for better contextualisation of monitoring data and analyses, which are essential for achieving reef conservation goals.


Assuntos
Antozoários , Recifes de Corais , Animais , Teorema de Bayes , Oceanos e Mares
4.
Placenta ; 76: 6-9, 2019 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-30803713

RESUMO

Placental mediated fetal growth restriction (FGR) is a leading cause of perinatal morbidity and mortality. Heparan sulphate proteoglycans (HSPG) are highly expressed in placentae and regulate haemostasis. We hypothesise that altered expression of HSPGs, glypicans (GPC) may contribute to the development of FGR and small-for-gestational-age (SGA). GPC expression was determined in first-trimester chorionic villous samples collected from women with later SGA pregnancies and in placentae from third-trimester FGR and gestation-matched uncomplicated pregnancies. The expression of both GPC1 and GPC3 were significantly reduced in first-trimester SGA as well as in the third-trimester FGR placentae compared to controls. This is the first study to report a relationship between altered placental GPC expression and subsequent development of SGA/FGR.


Assuntos
Retardo do Crescimento Fetal/metabolismo , Glipicanas/metabolismo , Placenta/metabolismo , Adulto , Estudos de Casos e Controles , Feminino , Humanos , Recém-Nascido , Recém-Nascido Pequeno para a Idade Gestacional , Gravidez , Primeiro Trimestre da Gravidez/metabolismo , Terceiro Trimestre da Gravidez/metabolismo
5.
Placenta ; 45: 58-62, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27577711

RESUMO

Fetal growth restriction (FGR) is a leading cause of perinatal morbidity and mortality. FGR pregnancies are often associated with histological evidence of placental vascular thrombosis. The proteoglycans are important components and regulators of vascular homeostasis. Previous studies from our laboratory highlighted mRNA and protein expression differences in placental proteoglycan decorin (DCN), within a clinically well-characterised cohort of third-trimester idiopathic FGR compared with gestation-matched uncomplicated control pregnancies. We also showed that decorin contributes to abnormal angiogenesis and increased thrombin generation in vitro. These observations suggest that DCN gene expression may contribute to the etiology of FGR. Small for gestational age (SGA) is frequently used as a proxy for FGR and is defined as a birth weight below the 10th percentile of a birth weight curve. We therefore made use of a unique resource of first trimester tissues obtained via chorionic villus sampling during the first trimester to investigate the temporal relationship between altered DCN expression and any subsequent development of SGA. We hypothesized that placental DCN expression is decreased early in gestation in SGA pregnancies. Surplus chorionic villus specimens from 15 women subsequently diagnosed with FGR and 50 from women with uncomplicated pregnancies were collected. DCN mRNA and DCN protein were determined using real-time PCR and immunoblotting, respectively. Both DCN mRNA and protein were significantly decreased in placentae from first-trimester SGA-pregnancies compared with controls (p < 0.05). This is the first study to report a temporal relationship between altered placental DCN expression and subsequent development of SGA.


Assuntos
Decorina/metabolismo , Regulação para Baixo , Placenta/metabolismo , Adulto , Feminino , Humanos , Recém-Nascido Pequeno para a Idade Gestacional , Idade Materna , Gravidez , Primeiro Trimestre da Gravidez/metabolismo
6.
Placenta ; 35(8): 596-605, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24947404

RESUMO

OBJECTIVE: Fetal growth restriction (FGR) is a key cause of adverse pregnancy outcome where maternal and fetal factors are identified as contributing to this condition. Idiopathic FGR is associated with altered vascular endothelial cell functions. Decorin (DCN) has important roles in the regulation of endothelial cell functions in vascular environments. DCN expression is reduced in FGR. The objectives were to determine the functional consequences of reduced DCN in a human microvascular endothelial cell line model (HMVEC), and to determine downstream targets of DCN and their expression in primary placental microvascular endothelial cells (PLECs) from control and FGR-affected placentae. APPROACH: Short-interference RNA was used to reduce DCN expression in HMVECs and the effect on proliferation, angiogenesis and thrombin generation was determined. A Growth Factor PCR Array was used to identify downstream targets of DCN. The expression of target genes in control and FGR PLECs was performed. RESULTS: DCN reduction decreased proliferation and angiogenesis but increased thrombin generation with no effect on apoptosis. The array identified three targets of DCN: FGF17, IL18 and MSTN. Validation of target genes confirmed decreased expression of VEGFA, MMP9, EGFR1, IGFR1 and PLGF in HMVECs and PLECs from control and FGR pregnancies. CONCLUSIONS: Reduction of DCN in vascular endothelial cells leads to disrupted cell functions. The targets of DCN include genes that play important roles in angiogenesis and cellular growth. Therefore, differential expression of these may contribute to the pathogenesis of FGR and disease states in other microvascular circulations.


Assuntos
Decorina/metabolismo , Células Endoteliais/metabolismo , Retardo do Crescimento Fetal/etiologia , Regulação da Expressão Gênica , Placenta/metabolismo , Apoptose , Estudos de Casos e Controles , Linhagem Celular , Proliferação de Células , Feminino , Retardo do Crescimento Fetal/metabolismo , Humanos , Gravidez , RNA Interferente Pequeno , Trombina/metabolismo
7.
Hong Kong Med J ; 19(6 Suppl 7): 1-24, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-24356244

RESUMO

This report presents the latest estimates of Hong Kong domestic health spending for financial years 1989/90 to 2010/11, cross-stratified and categorised by financing source, provider, and function.Total expenditure on health (TEH) was HK$93 433 million in financial year 2010/11, which represents an increase of HK$5364 million or 6.1% over the preceding year. As a result of a gradual recovery from the financial tsunami in 2008, gross domestic product (GDP) grew faster relative to TEH leading to a drop in TEH as a percentage of GDP from 5.2% in 2009/10 to 5.1% in 2010/11.During the period 1989/90 to 2010/11, TEH per capita (at constant 2011 prices)grew at an average annual rate of 4.8%, which was faster than the average annual growth rate of per capita GDP by 1.8 percentage points.Compared to 2009/10, in 2010/11 public and private expenditure on health increased by 3.7% and 8.5% and reached HK$45 491 million and HK$47 943 million, respectively. Consequently, the public share of TEH dropped slightly from 49.8% to 48.7% over the year. Regarding private spending, the most important source was out-of-pocket payments by households (35.0% of TEH),followed by employer-provided group medical benefits (7.4%), and private insurance (7.2%). It is worth noting that private insurance will likely overtake employer benefits as the second largest private payer if the insurance market continues to expand at the current rate.Of the HK$93 433 million TEH in 2010/11, HK$88 987 million (95.2%) was current expenditure and HK$4446 million (4.8%) was for capital expenses (ie investment in medical facilities). Analysed by health care function, services for curative care accounted for the largest share of TEH (65.8%), which was made up of ambulatory services (34.0%), in-patient curative care (27.0%), day patient hospital services (4.2%), and home care (0.5%). Notwithstanding its small share,the total spending for day patient hospital services shows an increasing trend over the period 1989/90 to 2010/11, which is likely due to shift of policy directives from in-patient to day patient care, and the increasing demand for dialysis and cataract surgery in an ageing population.Hospitals accounted for an increasing share of TEH, from 28.2% in 1989/90 to 46.8% in 2002/03 and then dropped slightly to 43% to 44%during the period 2005/06 to 2010/11, which was primarily driven by reduced expenditure by the Hospital Authority. As a result of several epidemics (e g avian flu, SARS, swine flu) and expansion of the private health insurance market in the last two decades, spending on the provision and administration of public health programmes, and general health administration and insurance accounted for increasing, though less significant, shares of TEH over that period.Without taking into account capital expenses (ie investment in medical facilities), public current expenditure on health amounted to HK$42 264 million(47.5% of total current expenditure) in 2010/11. The remaining HK$46 723 million was from private sources. Public current expenditure was mostly incurred at hospitals (74.7%), whereas private current expenditure was mostly incurred at providers of ambulatory health care (51.0%). Although both public and private spending were mostly expended on personal health care services and goods (91.4%of total current spending), the distributional patterns among functional categories differed. Public expenditure was targeted at in-patient care (47.6%) and substantially less on out-patient care (27.5%). In comparison, private spending was mostly concentrated on out-patient care (43.2%),whereas in-patient care (24.5%) and medical goods outside the patient care setting (19.9%) accounted for most of the remaining share. Compared to the Organisation for Economic Cooperation and Development countries, Hong Kong has devoted a relatively low percentage of GDP to healthcare in the last decade. As a share of TEH, public funding(either general government revenue or social security funds) was also lower than in most economies with comparable economic development and public revenue collection base.


Assuntos
Gastos em Saúde/estatística & dados numéricos , Financiamento Governamental/economia , Pessoal de Saúde/economia , Hong Kong
8.
Hong Kong Med J ; 19(2 Suppl 3): 1-24, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23589588

RESUMO

This report presents the latest estimates of Hong Kong domestic health spending for financial years 1989/90 to 2009/10, cross-stratified and categorised by financing source, provider and function. Total expenditure on health (TEH) was HK$88,721 million in financial year 2009/10, which represents an increase of HK$5031 million or 6.0% over the preceding year. As a result of a slow revival in the economy from the financial tsunami in 2008, TEH grew faster relative to gross domestic product (GDP) leading to a marked increase in TEH as a percentage of GDP from 5.0% in 2008/09 to 5.2% in 2009/10. During the period 1989/90 to 2009/10, total health spending per capita (at constant 2010 prices) grew at an average annual rate of 4.9%, which was faster than the average annual growth rate of per capita GDP by 2.0 percentage points. In 2009/10, public and private expenditure on health increased by 6.2% and 5.8% when compared with 2008/09, reaching HK$43,823 million and HK$44,898 million, respectively. Consequently, public and private shares of total health expenditure stayed at similar levels (49% and 51% respectively) in the 2 years. With respect to private spending, the most important source of health financing was out-of-pocket payments by households (34.9% of TEH), followed by employer-provided group medical benefits (7.4%) and private insurance (6.8%). During the period, a growing number of households (mostly in middle to high income groups) have taken out pre-payment plans to finance health care. As such, private insurance has taken on an increasingly important role in financing private spending. Of the HK$88,721 million total health expenditure in 2009/10, current expenditure comprised HK$84,874 million (95.7%), whereas HK$3847 million (4.3%) was for capital expenses (ie investment in medical facilities). Analysed by health care function, services for curative care accounted for the largest share (66.2%), which was made up of ambulatory services (33.5%), in-patient curative care (27.3%), day patient hospital services (4.9%) and home care (0.5%). Notwithstanding the small share of total spending for day patient hospital services, there was an increasing trend over the period 1989/90 to 2009/10, likely as a result of policy directives to shift the emphasis from in-patient to day patient care. Hospitals accounted for an increasing share of total spending, from 28.2% in 1989/90 to 46.8% in 2002/03 and then dropped steadily to 43% to 44% during the period 2005/06 to 2009/10. This trend was primarily driven by reduced expenditure by the Hospital Authority. As a result of epidemics that were of public health importance (eg avian flu, SARS, swine flu) and expansion of the private health insurance market in the last 2 decades, spending on provision and administration of public health programmes, and general health administration and insurance accounted for increasing, though less significant, shares of total health spending over the period. Without taking into account capital expenses (ie investment in medical facilities), public current expenditure on health amounted to HK$40,951 million (48.2% of total current expenditure) in 2009/10. The remaining HK$43,923 expenditure was mostly incurred at hospitals (74.1%), whereas private current expenditure was mostly incurred at providers of ambulatory health care (50.9%). Although both public and private spending were mostly expended on personal health care services and goods (91.0% of total current spending), the distribution patterns among functional categories differed. Public expenditure was targeted at in-patient care (48.9%) and substantially less on out-patient care (26.0%). In comparison, private spending was mostly concentrated on out-patient care (43.4%), whereas in-patient care (23.3%) and medical goods outside the patient care setting (19.5%) accounted for the majority of the remaining share. Compared to the Organisation for Economic Cooperation and Development countries, Hong Kong has devoted a relatively low percentage of GDP to health care in the last decade. As a share of total spending, public funding (either general government revenue or social security funds) was also lower than in most economies with comparable economic development and public revenue collection base.


Assuntos
Gastos em Saúde , Financiamento Pessoal , Produto Interno Bruto , Hong Kong , Humanos , Seguro Saúde , Saúde Pública , Fatores de Tempo
9.
Placenta ; 34(4): 299-309, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23484914

RESUMO

The placenta provides critical transport functions between the maternal and fetal circulations during intrauterine development. Formation of this interface is controlled by nuclear transcription factors including homeobox genes. Here we summarize current knowledge regarding the expression and function of homeobox genes in the placenta. We also describe the identification of target transcription factors including PPARγ, biological pathways regulated by homeobox genes and their role in placental development. The role of the nuclear receptor PPARγ, ligands and target genes in human placental development is also discussed. A better understanding of these pathways will improve our knowledge of placental cell biology and has the potential to reveal new molecular targets for the early detection and diagnosis of pregnancy complications including human fetal growth restriction.


Assuntos
Genes Homeobox/fisiologia , PPAR gama/genética , Doenças Placentárias/patologia , Placenta/patologia , Placentação , Placentação/genética , Animais , Diferenciação Celular , Células Cultivadas , Inibidor de Quinase Dependente de Ciclina p57/fisiologia , Feminino , Retardo do Crescimento Fetal/genética , Proteínas de Homeodomínio/fisiologia , Humanos , Camundongos , Doenças Placentárias/genética , Placentação/fisiologia , Gravidez , Proteínas Proto-Oncogênicas c-jun/fisiologia , Proteínas Proto-Oncogênicas c-myc/fisiologia , Fatores de Transcrição/fisiologia , Trofoblastos/fisiologia
10.
Hong Kong Med J ; 18(4 Suppl 4): 1-23, 2012 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-22947491

RESUMO

This report presents the latest estimates of Hong Kong domestic health spending for financial years 1989/90 to 2008/09, cross-stratified and categorised by financing source, provider and function. Total expenditure on health (TEH) was HK$84,391 million in financial year 2008/09, which represents an increase of HK$5030 million or 6.3% over the preceding year. Amid the financial tsunami in late 2008, TEH grew faster relative to gross domestic product (GDP) leading to a marked increase as a percentage of GDP from 4.8% in 2007/08 to 5.1% in 2008/09. During the period 1989/90 to 2008/09, TEH per capita (at constant 2009 prices) grew at an average annual rate of 4.9%, which was faster than that of per capita GDP by 2.0 percentage points. 6.4% when compared with 2007/08, reaching HK$41 257 million and HK$43 134 million, respectively. Consequently, public and private shares of total health expenditure remained the same in the 2 years at 48.9% and 51.1%, respectively. Regarding private spending, the most important source of health financing was out-of-pocket payments by households (35.4% of TEH), followed by employer-provided group medical benefits (7.5%) and private insurance (6.4%). During the period, a growing number of households (mostly in middle to high-income groups) subscribed to pre-payment plans for financing health care. As such, private insurance has taken on an increasingly important role for financing private spending. Of the HK$84 391 million total health expenditure in 2008/09, current expenditure comprised HK$81 186 million (96.2%), whereas HK$3206 million (3.8%) was for capital expenses (ie investment in medical facilities). Analysed by health care function, services for curative care accounted for the largest share of total health spending (66.1%), which was made up of ambulatory services (32.8%), in-patient curative care (28.8%), day patient hospital services (3.9%) and home care (0.5%). Notwithstanding the small share of total spending for day patient hospital services, there was an increasing trend over the period 1989/90 to 2008/09, likely as a result of policy directives to shift the emphasis from inpatient to day patient care. 1989/90 to 46.8% in 2002/03 and then dropped slightly to 43.1% in 2007/08, which was primarily driven by reduced expenditure of Hospital Authority. Compared with the preceding year, expenditure on hospitals increased by HK$2935 million in 2008/09, whereas the corresponding increase for providers of ambulatory health care was only HK$919 million. As a result, the hospital share rebounded a little to 44.0% of total health spending, whereas that of providers of ambulatory health care dropped to 29.1%. Without taking into account capital expenses (ie investment in medical facilities), public current expenditure on health amounted to HK$39 301 million (48.4% of total current expenditure) in 2008/09 with the remaining HK$41 885 million made up from private sources. Public current expenditure was mostly incurred at hospitals (76.1%), whereas private current expenditure was mostly incurred at providers of ambulatory health care (48.9%). Although both public and private spending were mostly expended on personal health care services and goods (91.8% of total current spending), the patterns of distribution among functional categories differed. Public expenditure was targeted at in-patient care (51.8%) and substantially less on out-patient care (25.1%). In comparison, private spending was mostly concentrated on out-patient care (42.6%), whereas in-patient care (23.4%) and medical goods outside the patient care setting (22.5%) accounted for the majority of the remaining share. Compared to the Organisation for Economic Cooperation and Development countries, Hong Kong has devoted a relatively low percentage of GDP to health care in the last decade. As a share of total spending, public funding (either general government revenue or social security funds) in Hong Kong was also lower than that in most economies with comparable economic development and public revenue collection base.


Assuntos
Custos de Cuidados de Saúde/estatística & dados numéricos , Gastos em Saúde/estatística & dados numéricos , Setor Privado/economia , Setor Público/economia , Assistência Ambulatorial/economia , Custos de Cuidados de Saúde/tendências , Gastos em Saúde/tendências , Política de Saúde/economia , Serviços de Assistência Domiciliar/economia , Hong Kong , Hospitalização/economia , Humanos , Assistência de Longa Duração/economia , Instituições Residenciais/economia
11.
Gynecol Obstet Invest ; 73(4): 277-84, 2012.
Artigo em Inglês | MEDLINE | ID: mdl-22516801

RESUMO

BACKGROUND/AIMS: Pre-eclampsia (PE) is one of the leading causes of maternal and perinatal morbidity and mortality. PE is defined clinically as the onset of maternal hypertension and proteinuria following 20 weeks of gestation. It is associated with altered maternal uterine decidual spiral artery remodelling, which may lead to reduced blood flow and increased thrombosis within the uteroplacental vasculature. Proteoglycans (PGs) are macromolecules which have (in combination with glycosaminoglycans) important anticoagulant roles in vascular endothelial environments, including the uteroplacental circulation. The hypothesis under consideration in this study was that differential expression of placental PGs may be associated with PE. METHODS: PE and control placental samples were collected with ethics approval and patient consent. RNA and protein were extracted and real-time PCR and Western immunoblotting were performed to determine the expression of the PGs in the samples. RESULTS: Of the nine PGs investigated, none showed increased expression, whereas the mRNA and protein expression of five of them was significantly decreased in the placentae of pre-eclamptic women compared to gestation-matched controls. CONCLUSION: Therefore, the results of this study support the hypothesis that a placental PG deficiency may contribute to the placental thrombotic lesions characteristic of PE.


Assuntos
Placenta/metabolismo , Pré-Eclâmpsia/metabolismo , Proteoglicanas/análise , Proteoglicanas/genética , Adulto , Western Blotting , Decorina/análise , Decorina/genética , Feminino , Expressão Gênica , Glipicanas/análise , Glipicanas/genética , Proteoglicanas de Heparan Sulfato/análise , Proteoglicanas de Heparan Sulfato/genética , Humanos , Placenta/química , Gravidez , RNA Mensageiro/análise , Sindecanas/análise , Sindecanas/genética
12.
Placenta ; 32(10): 745-51, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21802725

RESUMO

Dlx3, a member of the large homeobox gene family of transcription factors, is important for murine placental development. Targeted deletion of Dlx3 in the mouse results in embryonic death due to placental failure. This study investigated the role of human DLX3 in villous cytotrophoblast (VCT) differentiation in the placenta. Primary VCT from human term placentae, which spontaneously differentiate when maintained in culture over 72 h, showed a significant increase in mRNA and protein expression of DLX3 and 3ßHSD. The functional role of DLX3 was determined using trophoblast derived-cell line, BeWo. Forskolin treated BeWo cells showed significantly increased DLX3 mRNA and protein expression. Forskolin stimulation also showed a significant increase in syncytin and 3ßHSD mRNA expression, and increased release of ßhCG into the cell culture supernatant. To determine whether DLX3 had a direct or indirect effect on VCT differentiation, mRNA and protein expression of DLX3 was increased using a plasmid DLX3 over-expression construct. Over-expression of DLX3 resulted in increased mRNA expression of 3ßHSD and syncytin, as well as increased secretion of ß-hCG protein in the cell culture medium. In conclusion, we provide evidence that DLX3 acts upstream of syncytin, 3ßHSD and ßhCG and that DLX3 has a regulatory role in VCT differentiation.


Assuntos
Diferenciação Celular/fisiologia , Proteínas de Homeodomínio/biossíntese , Placenta/citologia , Fatores de Transcrição/biossíntese , Trofoblastos/citologia , 3-Hidroxiesteroide Desidrogenases/biossíntese , 3-Hidroxiesteroide Desidrogenases/genética , Linhagem Celular , Feminino , Produtos do Gene env/biossíntese , Produtos do Gene env/genética , Proteínas de Homeodomínio/genética , Humanos , Immunoblotting , Gravidez , Proteínas da Gravidez/biossíntese , Proteínas da Gravidez/genética , RNA Mensageiro/biossíntese , RNA Mensageiro/genética , Reação em Cadeia da Polimerase em Tempo Real , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Estatísticas não Paramétricas , Fatores de Transcrição/genética
13.
Placenta ; 31(8): 691-7, 2010 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-20542333

RESUMO

DLX3, a member of the large homeobox gene family of transcription factors, is necessary for normal placentation. Targeted deletion of dlx3 in mouse resulted in embryonic death due to placental failure. This study demonstrates the presence of DLX3 mRNA expression in human first trimester and term placental tissue, cultured trophoblast-like cell lines and in isolated primary villous and extravillous trophoblast cells. Using an ovine polyclonal antibody, the spatial distribution was identified for DLX3 in human placental tissues, trophoblast cell lines and in freshly isolated primary trophoblast cells. A 50 kDa immunoreactive DLX3 protein was detected in the human placenta, in trophoblast cell lines and in primary trophoblast cells. Nuclear expression for DLX3 was observed in villous cytotrophoblasts, syncytiotrophoblast and extravillous cytotrophoblast in the proximal regions of the cytotrophoblast cell columns in first trimester placental tissues. Immunoreactivity was also detected in few stromal cells and microvascular endothelial cells surrounding the fetal capillaries. In the first trimester placental bed, DLX3 expression was predominantly observed in the cytoplasm of the endovascular and interstitial trophoblasts. We conclude that the cellular expression of DLX3 was extensive in the human placenta and propose that DLX3 may play an important role in normal placental development.


Assuntos
Proteínas de Homeodomínio/metabolismo , Placenta/metabolismo , Fatores de Transcrição/metabolismo , Diferenciação Celular , Linhagem Celular , Proliferação de Células , Feminino , Humanos , Placentação , Gravidez , Primeiro Trimestre da Gravidez/metabolismo , Terceiro Trimestre da Gravidez/metabolismo
15.
Phytother Res ; 19(8): 674-8, 2005 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-16177969

RESUMO

The liver is the major organ for the metabolism of homocysteine (Hcy) and production of insulin-like growth factor 1 (IGF-1). Hcy metabolism and IGF-1 synthesis may be impaired in chronic liver diseases. The study investigated the regulatory effect of a Chinese herbal suppository, Vitalliver, on Hcy and IGF-1, as well as their relationship in patients with hepatitis B infection. Forty patients with chronic hepatitis B virus (HBV) infection without cirrhosis, 25 males and 15 females, were observed for changes in Hcy and IGF-1 after the administration of Vitalliver (one nightly) for a period of 3 months. Serum levels of Hcy, IGF-1 and IGFBP-3 were measured at baseline, and at 1 month and 3 months after treatment. Vitalliver reduced Hcy levels significantly (p = 0.001) from 9.7 +/- 2.8 to 9.0 +/- 2.1 micromol/L after treatment of 3 months. Furthermore, the IGF-1 levels increased significantly (p < 0.001) from 170.2 +/- 81.8 to 212.8 +/- 80.9 ng/mL at 1 month and 187.5 +/- 72.3 ng/mL at 3 months (p = 0.001) after treatment. In conclusion, it is speculated Vitalliver may have a self-regulatory effect on the release of IGF-1 in HBV patients without liver cirrhosis.


Assuntos
Medicamentos de Ervas Chinesas/farmacologia , Hepatite B/sangue , Hepatite B/tratamento farmacológico , Homocisteína/sangue , Fator de Crescimento Insulin-Like I/metabolismo , Medicina Tradicional Chinesa , Adolescente , Adulto , Feminino , Hepatite B/metabolismo , Humanos , Proteína 3 de Ligação a Fator de Crescimento Semelhante à Insulina/metabolismo , Masculino , Pessoa de Meia-Idade , Fitoterapia , Supositórios
16.
Transplant Proc ; 36(8): 2224-5, 2004 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15561198

RESUMO

Living related liver transplantation (LRLT) has gained popularity, especially in Asian countries as the primary mode of liver transplantation. LRLT, however, carries the inherent problem of potential donor harm. In view of reports of donor deaths and significant donor morbidity (as high as 67%), we examined donor complication rates in our LRLT program. All sixteen LRLT donors between February 2000 and January 2003 were retrospectively analyzed. The 16 donors (13 men, 3 women) of mean age 30 years (range, 18-49 years) included 5 donations from siblings, 2 from parents, and 9 from offsprings. The portion of liver donated was L hepatectomy (n = 4) R hepatectomy (n = 7), and Modified Extended R hepatectomy (n = 5) with the weight of resected liver being 618.9 g (range, 380-1000). The mean blood loss was 936 mL (range, 400-1900 mL), but only 2 donors required transfusion of banked blood. The mean intensive care unitstay was 1.06 days (range, 1-2 days) and the mean hospital stay was 9.12 days (range, 7-14 days). There was no case of reoperation and no mortality. There was no biliary or vascular complication. Four of 16 (25%) donors had a minor morbidity; 2 of 16 (12.5%) had a morbidity requiring intervention. In conclusion, with meticulous preoperative, intraoperative, and postoperative management, successful LRLT can be performed with minimal donor morbidities.


Assuntos
Transplante de Fígado/efeitos adversos , Doadores Vivos , Adolescente , Adulto , Feminino , Humanos , Transplante de Fígado/estatística & dados numéricos , Doadores Vivos/estatística & dados numéricos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Resultado do Tratamento
17.
Transplant Proc ; 36(8): 2277-8, 2004 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15561217

RESUMO

With a high prevalence of chronic hepatitis B and a low cadaveric organ donation rate, living donor liver transplantation (LDLT) remains the only option for many patients in Hong Kong. In such cases, the liver graft volume is smaller owing to a partial liver graft; therefore, a problem of small-for-size grafts often occurs. Between September 1999 and April 2003, 25 cadaveric, 16 living related, and 1 auto-LTs were performed at our center. The outcomes of LDLT were analyzed to assess the critical graft size and functional recovery. Among the 16 LDLT recipients (mean age, 44.4 +/- 14.4 years; mean weight, 61.9 +/- 11.4 kg), 1 patient received a graft from a donor left lobe (weight, 400 g) in an auxillary partial orthotopic LT (APOLT), 12 received right lobes, and 3 received left lobes. Besides the APOLT case, the overall graft/recipient weight ratio (GRWR) for the 15 LDLTs was 1.11 (0.76 to 1.75). The GRWR in the 25 cadaveric LTs was 1.92 (1.05 to 3.69) (P < .001). Among the 12 successful LDLTs, there were 5 (41.7%) cases of small-for-size graft syndrome: 3 of 3 (100%) in GRWR < or = 0.8%; 5 of 6 (83.3%) in GRWR < 1%; and 0 of 6 with GRWR > 1%. The initial post-LT graft function parameters were significantly higher among the LDLT group: International normalized ratio (INR), 1.42 vs 1.24, P = .03; alanine aminotransferase (ALT, 387 vs 201 IU/L, P = .005, and bilirubin, 170 vs 48 micromol/L, P < .001 as compared to the cadaveric transplant group). Small-for-size graft syndrome can be avoided if GRWR > 1%, but often occurs when GRWR < 0.8%. Graft function in LDLT recovers more slowly than in cadaveric liver transplant.


Assuntos
Transplante de Fígado/fisiologia , Fígado/anatomia & histologia , Doadores Vivos , Hepatite B/epidemiologia , Humanos , Transplante de Fígado/métodos , Pessoa de Meia-Idade , Estudos Retrospectivos , Transplante Autólogo , Transplante Homólogo , Resultado do Tratamento
18.
Transplant Proc ; 36(8): 2287-8, 2004 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15561221

RESUMO

Liver transplantation (LT) is an acceptable mode of treatment for selected patients with unresectable hepatocellular carcinoma (HCC). However, due to the scarcity of cadaveric donor organs, it is considered desirable for patients to opt for living donor liver transplantation (LDLT) or, for those not being transplanted soon, to have some form of tumor control therapy. Such an approach in our program is analyzed and reported. At our institution, 42 LTs were performed between October 1999 and April 2003. Of these, 18 recipients (15 men, 3 women) had 27 HCC. The average number and size of HCC was 1.59 (1 to 4) and 2.31 (0.2 to 6.5) cm, respectively. Thirteen (72%) patients were transplanted primarily for the HCC, whereas five (28%) others were incidental HCC cases. Seven patients (5 LRLT, 2 cadaveric LT) were transplanted soon after listing, and thus did not require tumor control therapy. Six patients waited for 11 (6 to 19) months before LT. Three patients underwent microwave coagulation therapy, and one had additional alcohol injections. One patient received the novel PIAF (cisplatin, interferon, adriamycin, and 5-FU) chemotherapy regimen followed by selective internal irradiation (SIR) treatment. One patient received conformal radiation therapy and another received SIR treatment before LT. Besides 2 postoperative deaths, the remaining 16 patients have been well, with a mean follow-up of 20.4 (3.6 to 41.2) months. In conclusion, for patients with unresectable HCC, in areas with poor cadaveric donor rate, living donation should be the first option. If a suitable live donor is not available, aggressive multimodality therapy is recommended while waiting for cadaveric LT.


Assuntos
Carcinoma Hepatocelular/cirurgia , Neoplasias Hepáticas/cirurgia , Transplante de Fígado/métodos , Transplante de Fígado/fisiologia , Doadores Vivos , Cadáver , Carcinoma Hepatocelular/patologia , Feminino , Humanos , Neoplasias Hepáticas/patologia , Transplante de Fígado/mortalidade , Masculino , Estadiamento de Neoplasias , Estudos Retrospectivos , Análise de Sobrevida , Fatores de Tempo , Doadores de Tecidos , Resultado do Tratamento , Listas de Espera
19.
Transplant Proc ; 36(8): 2302-3, 2004 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15561228

RESUMO

Severe acute respiratory syndrome (SARS) struck 1755 patients in Hong Kong and developed into a global health crisis. Although the World Health Organization and national health authorities are sparing no effort to contain the disease and to find a cure for the potentially deadly infection, SARS has an impact on our liver transplantation (LTx) program. Before the SARS outbreak, an average of 1 LTx was performed per month in our center. For 6 months since the outbreak, there had been no LTx performed. The intensive care unit had to be dedicated to patients with SARS. Two of the LTx team members were struck by SARS. A survey conducted among LTx recipients and their family members (n = 45) demonstrated symptoms of anxiety and stress in all. Some LTx recipients were treated at the Emergency Department for suspected SARS, which were later confirmed to be false alarms. Many LTx patients were too frightened to come back for follow-up. A new strain of coronavirus was identified as the causative agent. The origin of this virus is uncertain but the probability of zoonoses is being seriously discussed. Not only are immunosuppressed patients exposed to higher risk of infection, but also the waiting list mortality is also expected to increase. The SARS outbreak has demonstrated the vulnerability of an organ transplantation service and reminds us of the fearful possibility of zoonoses in future xeno-transplantation.


Assuntos
Transplante de Fígado/estatística & dados numéricos , Síndrome Respiratória Aguda Grave/epidemiologia , Controle de Doenças Transmissíveis , Surtos de Doenças , Hong Kong/epidemiologia , Humanos
20.
Transplant Proc ; 36(8): 2309-10, 2004 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-15561232

RESUMO

A patient with chronic hepatitis B underwent liver transplantation for end-stage cirrhosis. The donor liver graft had moderate steatosis and fibrosis. He was placed on lamivudine for hepatitis B prophylaxis but developed viral relapse due to emergence of a lamivudine-resistant mutant at week 72 posttransplantation. Results of liver biochemistry were normal liver histology revealed minimal steatosis and inflammation at weeks 151 and 128, respectively. This report illustrates that the use of a steatotic donor liver and the emergence of lamivudine resistance posttransplantation are not necessarily associated with significant graft damage. A marginal donor graft can be considered due to the donor shortage. Lamivudine monoprophylaxis for hepatitis B virus-related liver diseases post liver transplantation can be used in areas where hepatitis B immunoglobulin is not affordable.


Assuntos
Fígado Gorduroso , Hepatite B Crônica/cirurgia , Lamivudina/efeitos adversos , Transplante de Fígado , Doadores de Tecidos , Resistência a Medicamentos , Humanos , Masculino , Pessoa de Meia-Idade , Inibidores da Transcriptase Reversa/efeitos adversos , Resultado do Tratamento
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