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1.
Nucleic Acids Res ; 50(8): 4500-4514, 2022 05 06.
Artigo em Inglês | MEDLINE | ID: mdl-35451487

RESUMO

Histone H3.3 is an H3 variant which differs from the canonical H3.1/2 at four residues, including a serine residue at position 31 which is evolutionarily conserved. The H3.3 S31 residue is phosphorylated (H3.3 S31Ph) at heterochromatin regions including telomeres and pericentric repeats. However, the role of H3.3 S31Ph in these regions remains unknown. In this study, we find that H3.3 S31Ph regulates heterochromatin accessibility at telomeres during replication through regulation of H3K9/K36 histone demethylase KDM4B. In mouse embryonic stem (ES) cells, substitution of S31 with an alanine residue (H3.3 A31 -phosphorylation null mutant) results in increased KDM4B activity that removes H3K9me3 from telomeres. In contrast, substitution with a glutamic acid (H3.3 E31, mimics S31 phosphorylation) inhibits KDM4B, leading to increased H3K9me3 and DNA damage at telomeres. H3.3 E31 expression also increases damage at other heterochromatin regions including the pericentric heterochromatin and Y chromosome-specific satellite DNA repeats. We propose that H3.3 S31Ph regulation of KDM4B is required to control heterochromatin accessibility of repetitive DNA and preserve chromatin integrity.


Assuntos
Heterocromatina , Histonas , Animais , Camundongos , Histonas/genética , Histonas/metabolismo , Heterocromatina/genética , Histona Desmetilases/metabolismo , Fosforilação , Montagem e Desmontagem da Cromatina
2.
Hong Kong Med J ; 30(1): 33-43, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38369958

RESUMO

INTRODUCTION: The coronavirus disease 2019 (COVID-19) pandemic created many challenges for Hong Kong residents attempting to maintain healthy lifestyle habits. This study aimed to measure the prevalences of unhealthy dietary habits and physical inactivity levels in Hong Kong Chinese, identify associated factors, and conduct a time trend analysis during the third wave of the COVID-19 pandemic. METHODS: A cross-sectional telephone survey was conducted in Hong Kong by simple random sampling. The survey comprised socio-demographic characteristics, clinical information, the Hong Kong Diet Score (HKDS), smoking and alcohol consumption, and a Chinese version of the International Physical Activity Questionnaire Short Form. The composite outcome was low HKDS, physical inactivity, smoking, and alcohol consumption. We used 14 Health Behaviour Survey reports from 2003 to 2019 to establish a trend analysis regarding fruit and vegetable consumption, physical activity level, smoking, and alcohol consumption. RESULTS: We performed 1500 complete telephone surveys with a response rate of 58.8%. Most participants were older adults (≥65 years, 66.7%), women (65.6%), and married (77.9%). The HKDS was significantly lower in men, single individuals, low-income participants, alcohol drinkers, and patients with diabetes mellitus or renal disease. Participants who were single, undergoing long-term management of medical diseases, or had diabetes or renal diseases exhibited greater likelihood of physical inactivity. CONCLUSION: Prevalences of unhealthy lifestyle habits were high among men, single individuals, and chronic disease patients during the third wave of the COVID-19 pandemic in Hong Kong. The adoption of physical activity habits tended to decrease in the past two decades.


Assuntos
COVID-19 , Pandemias , Masculino , Humanos , Feminino , Idoso , Estudos Transversais , COVID-19/epidemiologia , COVID-19/prevenção & controle , Exercício Físico , Hong Kong/epidemiologia , Comportamento Alimentar
3.
Hong Kong Med J ; 30(3): 233-240, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38825732

RESUMO

The surgical management of obesity in Hong Kong has rapidly evolved over the past 20 years. Despite increasing public awareness and demand concerning bariatric and metabolic surgery, service models generally are not standardised across bariatric practitioners. Therefore, a working group was commissioned by the Hong Kong Society for Metabolic and Bariatric Surgery to review relevant literature and provide recommendations concerning eligibility criteria for bariatric and metabolic interventions within the local population in Hong Kong. The current position statement aims to provide updated guidance regarding the indications and contraindications for bariatric surgery, metabolic surgery, and bariatric endoscopic procedures.


Assuntos
Cirurgia Bariátrica , Obesidade , Humanos , Cirurgia Bariátrica/normas , Cirurgia Bariátrica/métodos , Hong Kong , Obesidade/cirurgia , Adulto , Endoscopia/métodos , Endoscopia/normas , Sociedades Médicas , Obesidade Mórbida/cirurgia
4.
Proc Natl Acad Sci U S A ; 115(18): 4737-4742, 2018 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-29669917

RESUMO

ATRX (alpha thalassemia/mental retardation X-linked) complexes with DAXX to deposit histone variant H3.3 into repetitive heterochromatin. Recent genome sequencing studies in cancers have revealed mutations in ATRX and their association with ALT (alternative lengthening of telomeres) activation. Here we report depletion of ATRX in mouse ES cells leads to selective loss in ribosomal RNA gene (rDNA) copy number. Supporting this, ATRX-mutated human ALT-positive tumors also show a substantially lower rDNA copy than ALT-negative tumors. Further investigation shows that the rDNA copy loss and repeat instability are caused by a disruption in H3.3 deposition and thus a failure in heterochromatin formation at rDNA repeats in the absence of ATRX. We also find that ATRX-depleted cells are reduced in ribosomal RNA transcription output and show increased sensitivity to RNA polymerase I (Pol I) transcription inhibitor CX5461. In addition, human ALT-positive cancer cell lines are also more sensitive to CX5461 treatment. Our study provides insights into the contribution of ATRX loss of function to tumorigenesis through the loss of rDNA stability and suggests the therapeutic potential of targeting Pol I transcription in ALT cancers.


Assuntos
DNA de Neoplasias/metabolismo , DNA Ribossômico/metabolismo , Dosagem de Genes , Mutação , Proteínas de Neoplasias/metabolismo , Neoplasias/metabolismo , Proteína Nuclear Ligada ao X/metabolismo , Benzotiazóis/farmacologia , Linhagem Celular Tumoral , DNA de Neoplasias/genética , DNA Ribossômico/genética , Instabilidade Genômica , Humanos , Naftiridinas/farmacologia , Proteínas de Neoplasias/genética , Neoplasias/genética , Neoplasias/patologia , RNA Polimerase I/antagonistas & inibidores , RNA Polimerase I/genética , RNA Polimerase I/metabolismo , Transcrição Gênica/efeitos dos fármacos , Transcrição Gênica/genética , Proteína Nuclear Ligada ao X/genética
5.
Med J Malaysia ; 75(2): 152-157, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-32281597

RESUMO

OBJECTIVES: To explore the epidemiological and histopathological patterns of glomerular diseases in Sabah. METHODS: A state-wide cross-sectional study was conducted. There were 336 native renal biopsies in 296 eligible patients from 1st January 2013 to 30th June 2016. All patients aged ≥12 years with sufficient sampling (≥8 glomeruli) for histopathological assessment were included. Graft kidney biopsies, protocol-based biopsies and patients with uncertain demographics were excluded. Demographics of patients, clinical data, laboratory parameters prior to biopsy, and histology findings of renal biopsies were collected from local unit database and recorded into a standardised data collection form. Descriptive statistical analyses were employed and factors associated with Lupus nephritis (LN) were explored using logistic regression. RESULTS: The mean age during biopsy was 34.53 years (Standard Deviation 0.759). Primary glomerulonephritis (PGN) accounted for 42.6% (126) of all native renal biopsies. The commonest cause of PGN was minimal change disease (38.9%, 49) followed by focal segmental glomerulosclerosis (33.3%, 42) and IgA nephropathy (14.3%, 18). LN is the leading cause for secondary glomerulonephritis (SGN) (87.2%, 136). Younger age (Odds Ratio, OR 0.978; 95% Confidence Interval, 95%CI 0.960, 0.996); female gender (OR 17.53; p<0.001); significant proteinuria (OR 132.0; p<0.001); creatinine level at biopsy (OR 11.26; p=0.004); positive antinuclear antibody (ANA) (OR 46.7; p<0.001); and ANA patterns (OR 8.038; p=0.018) were significant in predicting the odds of having LN. CONCLUSION: This is the first epidemiology study of glomerular diseases in Sabah. The predominance of LN suggests lower threshold for renal biopsy in patients with suspected glomerular disorders. We have identified significant predictors for early detection and treatment of LN.


Assuntos
Biópsia , Nefropatias/diagnóstico , Nefropatias/epidemiologia , Adolescente , Adulto , Criança , Estudos Transversais , Bases de Dados Factuais , Feminino , Glomerulonefrite/diagnóstico , Glomerulonefrite/epidemiologia , Humanos , Modelos Logísticos , Malásia/epidemiologia , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Adulto Jovem
6.
Dis Esophagus ; 32(1)2019 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-30085000

RESUMO

Dysphagia is a common symptom of esophageal cancer (EC). Esophagectomy should relieve the presenting dysphagia as the mechanical obstruction caused by the tumor is removed. However, the new onset oropharyngeal dysphagia develops after esophagectomy and the deficit may persist increasing the risk of aspiration pneumonia and mortality as well as adversely affecting quality of life (QOL). This study investigates the persistent swallowing deficits in long-term postesophagectomy patients and explores the factors associated with dysphagia severity, penetration, and aspiration. A better understanding of the swallowing function can aid future management of the condition. A total of 29 patients who were more than six months postesophagectomy for EC, had no history of disease that would likely affect swallowing function or vocal cord palsy underwent detailed videofluoroscopic swallow studies and completed the European Organisation for Research and Treatment of Cancer QLQ-C30 and OES18 QOL questionnaires. Swallowing deficits were analyzed and rated using the videofluoroscopic dysphagia scale (VDS) and the penetration-aspiration scale (PAS). These variables were correlated with the clinical and QOL parameters to determine which factors would affect swallowing function. Our cohort consisted of 27 males and 2 females. The mean duration after esophagectomy when the swallowing study was performed was 3.2 years (range: 0.5-18.4 years). Swallowing deficits were mainly found in the pharyngeal phase of swallowing. The mean total VDS score was 36.1 (SD = 15.2, range: 11.0-69.5) out of a possible 100. The mean PAS score was 4.1 (SD = 2.5, range: 1-8) and 1.5 (SD = 0.9, range: 1-4) for thin and semisolids, respectively. Dysphagia was significantly more severe in males, those of more advanced age at esophagectomy and at swallowing assessment. Increasing pathological N stage significantly correlated with worse PAS score for thin fluid. Self-reports of more pain and less troubles with coughing were also associated with less penetration and aspiration. This study demonstrated that a mild to moderate pharyngeal dysphagia is present late after esophagectomy even in patients without VC palsy or anastomotic stricture. The long-term aspiration rate is comparable to the figures in the literature for those early after esophagectomy. It is suggested that damage to the intercostal nerves and the pulmonary vagus may affect oropharyngeal swallowing function in this population.


Assuntos
Transtornos de Deglutição/diagnóstico por imagem , Neoplasias Esofágicas/cirurgia , Esofagectomia/efeitos adversos , Fotofluorografia/métodos , Complicações Pós-Operatórias/diagnóstico por imagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Deglutição/fisiologia , Transtornos de Deglutição/etiologia , Transtornos de Deglutição/fisiopatologia , Neoplasias Esofágicas/fisiopatologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Pneumonia Aspirativa/diagnóstico por imagem , Pneumonia Aspirativa/etiologia , Pneumonia Aspirativa/fisiopatologia , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/fisiopatologia , Qualidade de Vida , Índice de Gravidade de Doença , Inquéritos e Questionários , Fatores de Tempo , Resultado do Tratamento
7.
Hong Kong Med J ; 25(6): 444-452, 2019 12.
Artigo em Inglês | MEDLINE | ID: mdl-31796642

RESUMO

INTRODUCTION: Progressive supranuclear palsy (PSP) is a common type of atypical parkinsonism. To the best of our knowledge, there has been no study of its natural clinical course among Chinese patients. METHODS: This retrospective study included 21 patients with PSP who had radiological evidence of midbrain atrophy (confirmed by magnetic resonance imaging) from the geriatrics clinics of Queen Mary Hospital and Tuen Mun Hospital. Clinical information was retrieved from clinical records, including age at onset, age at presentation, age at death, duration of symptoms, level of education, sex, presenting scores on Cantonese version of Mini-Mental State Examination, clinical symptoms, and history of levodopa or dopamine agonist intake and response. Clinical symptoms were clustered into the following categories and the dates of development of these symptoms were determined: motor symptoms, bulbar symptoms, cognitive symptoms, and others. RESULTS: Motor symptoms developed early in the clinical course of disease. Cox proportional hazards modelling showed that the number of episodes of pneumonia, time to vertical gaze palsy, and presence of pneumonia were predictive of mortality. Apathy, dysphagia, pneumonia, caregiver stress, and pressure injuries were predictive of mortality when analysed as time-dependent covariates. There was a significant negative correlation between the age at presentation and time to mortality from presentation (Pearson correlation=-0.54, P=0.04). Approximately 40% of caregivers complained of stress during the clinical course of disease. CONCLUSION: Important clinical milestones, including the development of dysphagia, vertical gaze palsy, significant caregiver stress, pressure injuries, and pneumonia, may guide advanced care planning for patients with PSP.


Assuntos
Paralisia Supranuclear Progressiva/mortalidade , Idoso , Povo Asiático , Progressão da Doença , Feminino , Hong Kong/epidemiologia , Humanos , Imageamento por Ressonância Magnética , Masculino , Prontuários Médicos , Estudos Retrospectivos , Índice de Gravidade de Doença , Paralisia Supranuclear Progressiva/diagnóstico por imagem , Paralisia Supranuclear Progressiva/patologia , Análise de Sobrevida
9.
Hong Kong Med J ; 25(3): 178-182, 2019 06.
Artigo em Inglês | MEDLINE | ID: mdl-31178437

RESUMO

INTRODUCTION: Clostridioides difficile infection (CDI) is a leading cause of healthcare-associated infection globally, causing significant morbidity and mortality. Faecal microbiota transplantation (FMT) has emerged as a promising option for recurrent and refractory CDI. This study aimed to assess the safety, efficacy, and feasibility of FMT for CDI in Hong Kong. METHODS: We conducted a single-centre, retrospective study for all consecutive cases of recurrent or refractory CDI who underwent FMT from 2013 to 2018. Clinical demographics, outcome, and safety parameters were collected. RESULTS: A total of 24 patients with recurrent or refractory CDI (median age 70 years, interquartile range=45.0-78.3 years; 67% male) were included. Over 80% had been recently hospitalised or were long-term care facility residents. Faecal microbiota transplantation was delivered by feeding tube in 11 (45.8%), oesophagogastroduodenoscopy in eight (33.3%), and colonoscopy in six (25%) of the patients. Resolution of diarrhoea without relapse within 8 weeks was achieved in 21 out of 24 patients (87.5%) after FMT. No deaths occurred within 30 days. The FMT was well tolerated and no serious adverse events attributable to FMT were reported. CONCLUSION: Our results confirm that FMT is a safe, efficacious, and feasible intervention for patients with refractory or recurrent CDI in Hong Kong. Given the increasing disease burden and the lack of effective alternatives in Hong Kong for difficult-to-treat cases of CDI, we recommend that a territory-wide FMT service be established to address increasing demand for this treatment.


Assuntos
Infecções por Clostridium/terapia , Diarreia/terapia , Transplante de Microbiota Fecal , Idoso , Colonoscopia , Endoscopia do Sistema Digestório , Fezes/microbiologia , Feminino , Hong Kong , Humanos , Masculino , Pessoa de Meia-Idade , Recidiva , Estudos Retrospectivos , Resultado do Tratamento
10.
Occup Med (Lond) ; 68(3): 211-214, 2018 05 17.
Artigo em Inglês | MEDLINE | ID: mdl-29538712

RESUMO

Background: 3D printers emit potentially hazardous ultrafine particles and volatile organic compounds. Workers using 3D printing technologies may be at risk of respiratory illness from occupational exposure. Aims: To assess whether 3D printing is associated with health effects in occupational users. Methods: This was a preliminary survey. Workers in 17 companies using 3D printing, including commercial prototyping businesses, educational institutions and public libraries, in the Greater Toronto Area, Canada, were asked to complete survey questionnaires concerning demographic, occupational and health information. Associations between self-reported health history variables and occupational characteristics were examined by chi-square and Fisher's exact tests. Results: Among 46 surveyed workers, 27 (59% of participants) reported having respiratory symptoms at least once per week in the past year. Working more than 40 h per week with 3D printers was significantly associated with having been given a respiratory-related diagnosis (asthma or allergic rhinitis) (P < 0.05). We observed a wide variation in occupational hygiene practices in the 17 printing workplaces that we surveyed. Conclusions: Our finding of frequently reported respiratory symptoms suggests a need for additional studies on exposed workers in this field.


Assuntos
Exposição Ocupacional/efeitos adversos , Impressão Tridimensional/normas , Adulto , Distribuição de Qui-Quadrado , Escolaridade , Feminino , Inquéritos Epidemiológicos/métodos , Humanos , Renda/estatística & dados numéricos , Masculino , Ontário , Projetos Piloto , Compostos Orgânicos Voláteis/efeitos adversos
11.
Hong Kong Med J ; 24(2): 98-106, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29302017

RESUMO

INTRODUCTION: Elderly patients are at risk of drug-related problems. This study aimed to determine whether a pharmacist-led medication review programme could reduce inappropriate medications and hospital readmissions among geriatric in-patients in Hong Kong. METHODS: This prospective controlled study was conducted in a geriatric unit of a regional hospital in Hong Kong. The study period was from December 2013 to September 2014. Two hundred and twelve patients were allocated to receive either routine care (104) or pharmacist intervention (108) that included medication reconciliation, medication review, and medication counselling. Medication appropriateness was assessed by a pharmacist using the Medication Appropriateness Index. Recommendations made by the pharmacist were communicated to physicians. RESULTS: At hospital admission, 51.9% of intervention and 58.7% of control patients had at least one inappropriate medication (P=0.319). Unintended discrepancy applied in 19.4% of intervention patients of which 90.7% were due to omissions. Following pharmacist recommendations, 60 of 93 medication reviews and 32 of 41 medication reconciliations (68.7%) were accepted by physicians and implemented. After the program and at discharge, the proportion of subjects with inappropriate medications in the intervention group was significantly lower than that in the control group (28.0% vs 56.4%; P<0.001). The unplanned hospital readmission rate 1 month after discharge was significantly lower in the intervention group than that in the control group (13.2% vs 29.1%; P=0.005). Overall, 98.0% of intervention subjects were satisfied with the programme. There were no differences in the length of hospital stay, number of emergency department visits, or mortality rate between the intervention and control groups. CONCLUSIONS: A pharmacist-led medication review programme that was supported by geriatricians significantly reduced the number of inappropriate medications and unplanned hospital readmissions among geriatric in-patients.


Assuntos
Reconciliação de Medicamentos , Farmacêuticos , Serviço de Farmácia Hospitalar , Idoso , Idoso de 80 Anos ou mais , Atenção à Saúde , Feminino , Hospitalização , Humanos , Masculino , Estudos Prospectivos
12.
Nucleic Acids Res ; 43(5): 2603-14, 2015 Mar 11.
Artigo em Inglês | MEDLINE | ID: mdl-25690891

RESUMO

Human ALT cancers show high mutation rates in ATRX and DAXX. Although it is well known that the absence of ATRX/DAXX disrupts H3.3 deposition at heterochromatin, its impact on H3.3 deposition and post-translational modification in the global genome remains unclear. Here, we explore the dynamics of phosphorylated H3.3 serine 31 (H3.3S31ph) in human ALT cancer cells. While H3.3S31ph is found only at pericentric satellite DNA repeats during mitosis in most somatic human cells, a high level of H3.3S31ph is detected on the entire chromosome in ALT cells, attributable to an elevated CHK1 activity in these cells. Drug inhibition of CHK1 activity during mitosis and expression of mutant H3.3S31A in these ALT cells result in a decrease in H3.3S31ph levels accompanied with increased levels of phosphorylated H2AX serine 139 on chromosome arms and at the telomeres. Furthermore, the inhibition of CHK1 activity in these cells also reduces cell viability. Our findings suggest a novel role of CHK1 as an H3.3S31 kinase, and that CHK1-mediated H3.3S31ph plays an important role in the maintenance of chromatin integrity and cell survival in ALT cancer cells.


Assuntos
Montagem e Desmontagem da Cromatina , Cromatina/metabolismo , Histonas/metabolismo , Proteínas Quinases/metabolismo , Western Blotting , Linhagem Celular Transformada , Linhagem Celular Tumoral , Sobrevivência Celular/genética , Quinase 1 do Ponto de Checagem , Cromatina/genética , DNA Helicases/genética , DNA Helicases/metabolismo , Células HT29 , Células HeLa , Histonas/genética , Humanos , Microscopia de Fluorescência , Mutação , Neoplasias/genética , Neoplasias/metabolismo , Neoplasias/patologia , Proteínas Nucleares/genética , Proteínas Nucleares/metabolismo , Fosforilação , Proteínas Quinases/genética , Interferência de RNA , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Serina/genética , Serina/metabolismo , Telômero/genética , Telômero/metabolismo , Proteína Nuclear Ligada ao X
13.
Nucleic Acids Res ; 43(21): 10227-37, 2015 Dec 02.
Artigo em Inglês | MEDLINE | ID: mdl-26304540

RESUMO

In addition to being a hallmark at active genes, histone variant H3.3 is deposited by ATRX at repressive chromatin regions, including the telomeres. It is unclear how H3.3 promotes heterochromatin assembly. We show that H3.3 is targeted for K9 trimethylation to establish a heterochromatic state enriched in trimethylated H3.3K9 at telomeres. In H3f3a(-/-) and H3f3b(-/-) mouse embryonic stem cells (ESCs), H3.3 deficiency results in reduced levels of H3K9me3, H4K20me3 and ATRX at telomeres. The H3f3b(-/-) cells show increased levels of telomeric damage and sister chromatid exchange (t-SCE) activity when telomeres are compromised by treatment with a G-quadruplex (G4) DNA binding ligand or by ASF1 depletion. Overexpression of wild-type H3.3 (but not a H3.3K9 mutant) in H3f3b(-/-) cells increases H3K9 trimethylation level at telomeres and represses t-SCE activity induced by a G4 ligand. This study demonstrates the importance of H3.3K9 trimethylation in heterochromatin formation at telomeres. It provides insights into H3.3 function in maintaining integrity of mammalian constitutive heterochromatin, adding to its role in mediating transcription memory in the genome.


Assuntos
Heterocromatina/metabolismo , Código das Histonas , Histonas/metabolismo , Lisina/metabolismo , Telômero/metabolismo , Animais , Células Cultivadas , Dano ao DNA , Deleção de Genes , Histonas/química , Histonas/genética , Metilação , Camundongos , Troca de Cromátide Irmã , Transcrição Gênica
14.
Dis Esophagus ; 30(9): 1-8, 2017 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-28859363

RESUMO

Optimal interval between neoadjuvant chemoradiotherapy (CRT) and surgery is not elucidated for esophageal squamous carcinoma. The aim of this study is to evaluate the impact of this time interval on patient outcome. Patients treated with neoadjuvant CRT followed by surgery between 2002 and 2009 were analyzed. Patients were divided into two groups based on the median interval to surgery (64 days): A  64 days (n = 53). A second analysis was performed by re-classifying patients into three interval groups: A* ≤ 40 days (n = 16); B* 41-80 days (n = 60); C* > 80 days (n = 31). Operative outcome, pathological data, and long-term survival were analyzed. One hundred and seven (n = 107) patients were analyzed. Five patients (9.4%) in group B had an anastomotic leak compared with no leakage from group A (P < 0.021). The complete pathological response was comparable in groups A and B (35% vs. 24.5%, p = 0.23). R0 was significantly lower in group A* (A*: 56.3%, B*: 90%, C*: 74.2%, P = 0.006). In patients with R0 resection, 5-year survival was significantly better in group A than B (71.7% vs. 51%, P = 0.032) and in group A* (A* 100% vs. B* 60.2% & C* 48.3%; A* vs. B*, P = 0.036; A* vs. C*, P = 0.019). Complete pathological response was an independent predictor of survival. Early surgery with R0 resection following neoadjuvant CRT may lead to a better outcome. Further prospective studies are still necessary to provide better insight into the issue. At present, timing of surgery should be individualized and performed at the earliest opportunity.


Assuntos
Carcinoma de Células Escamosas/terapia , Neoplasias Esofágicas/terapia , Esofagectomia , Adulto , Idoso , Idoso de 80 Anos ou mais , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Quimiorradioterapia Adjuvante , Cisplatino/administração & dosagem , Esofagectomia/efeitos adversos , Feminino , Fluoruracila/administração & dosagem , Humanos , Masculino , Pessoa de Meia-Idade , Terapia Neoadjuvante , Neoplasia Residual , Estudos Retrospectivos , Taxa de Sobrevida , Fatores de Tempo , Resultado do Tratamento , Adulto Jovem
16.
Hong Kong Med J ; 23(3): 306-10, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28572521

RESUMO

Feeding problems are common in older people with advanced dementia. When eating difficulties arise tube feeding is often initiated, unless there is a valid advance directive that refuses enteral feeding. Tube feeding has many pitfalls and complications. To date, no benefits in terms of survival, nutrition, or prevention of aspiration pneumonia have been demonstrated. Careful hand feeding is an alternative to tube feeding with advanced dementia. In Hong Kong, the Hospital Authority has established clear ethical guidelines for careful hand feeding. Notwithstanding, there are many practical issues locally if tube feeding is not used in older patients with advanced dementia. Training of doctors, nurses, and other members of the health care team is vital to the promulgation of careful hand feeding. Support from the government and Hospital Authority policy, health care staff training, public education, and promotion of advance care planning and advance directive are essential to reduce the reliance on tube feeding in advanced dementia.


Assuntos
Diretivas Antecipadas , Demência/complicações , Nutrição Enteral/métodos , Demência/fisiopatologia , Nutrição Enteral/efeitos adversos , Hong Kong , Humanos , Equipe de Assistência ao Paciente , Pneumonia Aspirativa/prevenção & controle , Guias de Prática Clínica como Assunto
17.
Hong Kong Med J ; 23(3): 231-8, 2017 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-28278490

RESUMO

INTRODUCTION: The mortality rate after oesophageal perforation is high despite advances in operative and non-operative techniques. In this study, we sought to identify risk factors for hospital mortality after oesophageal perforation treatment. METHODS: We retrospectively examined patients treated for oesophageal perforation in a university teaching hospital in Hong Kong between January 1997 and December 2013. Their demographic and clinical characteristics, aetiology, management strategies, and outcomes were recorded and analysed. RESULTS: We identified a cohort of 43 patients treated for perforation of the oesophagus (28 men; median age, 66 years; age range, 30-98 years). Perforation was spontaneous in 22 (51.2%) patients (15 with Boerhaave's syndrome and seven with malignant perforation), iatrogenic in 15 (34.9%), and provoked by foreign body ingestion in six (14.0%). Of the patients, 14 (32.6%) had pre-existing oesophageal disease. Perforation occurred in the intrathoracic oesophagus in 30 (69.8%) patients. Emergent surgery was undertaken in 23 patients: 16 underwent primary repair, six surgical drainage or exclusion, and one oesophagectomy. Twenty patients were managed non-operatively, 13 of whom underwent stenting. Two stented patients subsequently required oesophagectomy. Four patients had clinical signs of leak after primary repair: two were treated conservatively and two required oesophagectomy. Overall, six (14.0%) patients required oesophagectomy, one of whom died. Nine other patients also died in hospital; the hospital mortality rate was 23.3%. Pre-existing pulmonary and hepatic disease, and perforation associated with malignancy were significantly associated with hospital mortality (P=0.03, <0.01, and <0.01, respectively). CONCLUSIONS: Most oesophageal perforations were spontaneous. Mortality was substantial despite modern therapies. Presence of pre-existing pulmonary disease, hepatic disease, and perforation associated with malignancy were significantly associated with hospital mortality. Salvage oesophagectomy was successful in selected patients.


Assuntos
Perfuração Esofágica/etiologia , Esofagectomia/métodos , Corpos Estranhos/complicações , Mortalidade Hospitalar , Adulto , Idoso , Idoso de 80 Anos ou mais , Estudos de Coortes , Neoplasias Esofágicas/complicações , Perfuração Esofágica/complicações , Perfuração Esofágica/mortalidade , Perfuração Esofágica/terapia , Feminino , Hong Kong , Hospitais Universitários , Humanos , Masculino , Doenças do Mediastino/complicações , Pessoa de Meia-Idade , Estudos Retrospectivos , Fatores de Risco , Stents
19.
Med J Malaysia ; 72(3): 179-185, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28733566

RESUMO

AIM: To study the epidemiology, clinical characteristics, vascular access, and the short term survival of ESRD patients initiated on dialysis from Hospital Queen Elizabeth (HQE). BACKGROUND: The number of patients with ESRD is increasing in Sabah, Malaysia. Most patients present late and some live in remote areas with difficult access to healthcare services. Many therefore present with potentially fatal complications. METHODS: All the newly confirmed ESRD patients who were initiated on renal replacement therapy (RRT) from 1 January to 31 December 2014 were included. The basic epidemiological and clinical data were collected. They were divided into three groups: Group 1 - those known to the medical service and had been prepared properly for the initiation of RRT; Group 2 - those known to the medical service, but were not prepared for the RRT; Group 3 - those with undiagnosed CKD. Outcome is mainly survival at 3rd, 6th, 9th and 12th month. RESULTS: There were 249 ESRD patients. 153 (61.4%) were male. The average age was 53.3 (range 12 - 83). The main cause of ESRD was diabetic nephropathy (128 patients, 51.4%). Most patients were started on RRT with a catheter (74.3%), 47 patients (18.9%) with a fistula, and 17 patients (6.8%) with a Tenckhoff catheter. 185 (74.3%) patients were not prepared properly (Group 2 - 66.3%, and Group 3 - 8.0%). The survival for 249 patients were 86.3% at 6 months, 77.9% at 12 months. Group 2 has the worst survival (81.9% at 6 months, 71.1% at 12 months). CONCLUSIONS: Our data showed that most patients (74.3%) were started on dialysis in an unplanned manner with poor survival. A comprehensive and well-supported predialysis programme is needed.


Assuntos
Falência Renal Crônica/epidemiologia , Adolescente , Adulto , Fatores Etários , Idoso , Idoso de 80 Anos ou mais , Criança , Estudos Transversais , Feminino , Humanos , Falência Renal Crônica/diagnóstico , Falência Renal Crônica/mortalidade , Malásia/epidemiologia , Masculino , Pessoa de Meia-Idade , Terapia de Substituição Renal/estatística & dados numéricos , Fatores Sexuais , Análise de Sobrevida , Centros de Atenção Terciária/estatística & dados numéricos , Adulto Jovem
20.
Diabet Med ; 33(10): 1427-36, 2016 10.
Artigo em Inglês | MEDLINE | ID: mdl-26433212

RESUMO

AIM: To assess whether a structured diabetes education programme, the Patient Empowerment Programme, was associated with a lower rate of all-cause hospitalization and emergency department visits in a population-based cohort of patients with Type 2 diabetes mellitus in primary care. METHODS: A cohort of 24 250 patients was evaluated using a linked administrative database during 2009-2013. We selected 12 125 patients with Type 2 diabetes who had at least one Patient Empowerment Programme session attendance. Patients who did not participate in the Patient Empowerment Programme were matched one-to-one with patients who did, using the propensity score method. Hospitalization events and emergency department visits were the events of interest. Cox proportional hazard and negative binomial regressions were performed to estimate the hazard ratios for the initial event, and incidence rate ratios for the number of events. RESULTS: During a median 30.5 months of follow-up, participants in the Patient Empowerment Programme had a lower incidence of an initial hospitalization event (22.1 vs 25.2%; hazard ratio 0.879; P < 0.001) and emergency department visit (40.5 vs 44%; hazard ratio 0.901; P < 0.001) than those who did not participate in the Patient Empowerment Programme. Participation in the Patient Empowerment Programme was associated with a significantly lower number of emergency department visits (incidence rate ratio 0.903; P < 0.001): 40.4 visits per 100 patients annually in those who did not participate in the Patient Empowerment Programme vs. 36.2 per 100 patients annually in those who did. There were significantly fewer hospitalization episodes (incidence rate ratio 0.854; P < 0.001): 20.0 hospitalizations per 100 patients annually in those who did not participate in the Patient Empowerment Programme vs. 16.9 hospitalizations per 100 patients annually in those who did. CONCLUSIONS: Among patients with Type 2 diabetes, the Patient Empowerment Programme was shown to be effective in delaying the initial hospitalization event and in reducing their frequency.


Assuntos
Diabetes Mellitus Tipo 2/epidemiologia , Diabetes Mellitus Tipo 2/terapia , Serviço Hospitalar de Emergência/estatística & dados numéricos , Hospitalização/estatística & dados numéricos , Educação de Pacientes como Assunto/organização & administração , Participação do Paciente , Atenção Primária à Saúde/organização & administração , Adulto , Idoso , Bases de Dados Factuais , Feminino , Seguimentos , Humanos , Masculino , Pessoa de Meia-Idade , Educação de Pacientes como Assunto/métodos , Educação de Pacientes como Assunto/normas , Participação do Paciente/métodos , Participação do Paciente/estatística & dados numéricos , Atenção Primária à Saúde/métodos
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