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INTRODUCTION: This study aimed to determine the prevalence and association between the severity of COVID-19 and short and long-term neuropsychiatric symptoms, as well as the risk factors for the development of these symptoms. MATERIALS AND METHODS: A prospective observational study was conducted between 1st October 2021 till September 2022 in the state of Johor, Malaysia. 300 patients with confirmed SARS-CoV-2 infection were randomly selected and followed up for six months. Data were analysed by using Chi-square test, Fisher's Exact test, Paired t test and Multiple logistic regression. RESULTS: The prevalence of short-term neuropsychiatric symptoms was 78%, with anosmia being the most prevalent symptom. Long-term symptoms were found in 22.75% of patients, with headache being the most prevalent (p= 0.001). COVID-19 Stage 2 and 3 infections were associated with a higher risk of short-term neuropsychiatric symptoms, OR for Stage 2 infection was 5.18 (95% CI: 1.48-16.97; p=0.009) and for Stage 3 infection was 4.52 (95% CI: 1.76-11.59; p=0.002). Complete vaccination was a significant predictor of longterm symptoms with adjusted OR 3.65 (95% CI 1.22-10.91; p=0.021). CONCLUSION: This study demonstrated that neuropsychiatric symptoms were common among COVID-19 patients in Johor, Malaysia and the risk of these symptoms was associated with the severity of the infection. Additionally, complete vaccination does not completely protect against long-term neuropsychiatric deficits. This is crucial for continuous monitoring and addressing neuropsychiatric symptoms in COVID-19 survivors.
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COVID-19 , Pacientes Internados , Humanos , Anosmia , COVID-19/complicações , COVID-19/epidemiologia , Malásia/epidemiologia , SARS-CoV-2 , Estudos ProspectivosRESUMO
Prevalence of cognitive impairment in hip fractures was 86.5%. MoCA is an independent risk factor of mortality. MoCA score of < 15 is correlated with 11.71 times increased risk of mortality. Early attention and caution should be given to these patients for appropriate intervention to decrease mortality rates. INTRODUCTION: Hip fractures rank amongst the top 10 causes of disability and current mortality of hip fractures is high. Objectives were to determine 1) prevalence of cognitive impairment, 2) whether Montreal Cognitive Assessment (MoCA) score was an independent risk factor associated with mortality, 3) MoCA cut-off that result in high risk of mortality. METHODS: This was a cohort study between July 2019 to June 2020. Inclusion criteria were 1) hip fracture, 2) > = 65 years old, and 3) low-energy trauma. Patients undergo assessment for cognitive impairment with MoCA. Prevalence was assessed, MoCA cut-off point, and accuracy of statistical model was evaluated. Logistic regression modelling was used to assess association between mortality and MoCA. RESULTS: There were 260 patients recruited. Two hundred twenty-five patients had MoCA score < 22 signifying cognitive impairment, and 202 patients had MoCA score of < 19. 46 hip fracture patients died at 1-year follow-up. 45 of these patients had MoCA score < 19, and 1 patient had a MoCA > 22. Results showed statistical significance and good model effect (at least 0.8) with MoCA cut-off points between < 15 and < 19 (p < 0.05). After controlling confounding factors, statistical significance still existed in MoCA cut-off point at < 15 (odds ratio (95% CI) = 11.71 (1.14, 120.71); p = 0.04). CONCLUSION: Prevalence of cognitive impairment in hip fractures was 86.5%. MoCA is an independent risk factor of mortality in hip fracture patients. MoCA score of < 15 is correlated with 11.71 times increased risk of mortality at 1-year after a hip fracture. AUC with MoCA score < 15 was 0.948. Early attention and caution should be given to these patients for appropriate intervention to decrease mortality rates.
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Disfunção Cognitiva , Fraturas do Quadril , Idoso , Disfunção Cognitiva/epidemiologia , Disfunção Cognitiva/etiologia , Estudos de Coortes , Fraturas do Quadril/complicações , Humanos , Testes de Estado Mental e Demência , Testes Neuropsicológicos , Fatores de RiscoRESUMO
The genetic fusion of cytolysin A (clyA) to heterologous antigen expressed in live Salmonella vector demonstrated efficient translocation into periplasmic space and extracellular medium. Accumulating evidence has shown that clyA-mediated antigen delivery improved growth fitness and enhanced immunogenicity of live vector vaccine, but the factors influencing this protein exportation has not been investigated. In this study, Toxoplasma gondii antigen fused at C-terminal of clyA protein was expressed in live S. Typhi vector via both plasmid and chromosomal-based expressions. The bivalent strains showed comparable growth rates as monovalent strains, but in varies antigen exportation efficiency. ClyA-fusion antigen with positive charges was translocated to the extracellular spaces, whereas those with negative charges were retained in the cytoplasm. Furthermore, excessive cellular resources expenditure on antigen expression, especially antigen with larger size, could limit the clyA-fusion antigen exportation, resulting in undesirable metabolic burden that eventually affects the growth fitness. Altogether, the present work indicates potential linkage of factors mainly on antigen properties and expression platforms that may affect clyA-mediated antigen delivery to enhance the growth fitness of live vector strain.
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Proteínas de Bactérias , Salmonella typhi , Proteínas de Bactérias/metabolismo , Perforina/genética , Perforina/metabolismo , Salmonella typhi/genética , Vacinas Atenuadas , Vacinas Sintéticas/genética , Vacinas Sintéticas/metabolismoRESUMO
Background: Community psychiatric rehabilitation has proven effective in supporting individuals and their families in recovering from mental illness. The delivery of evidence-based community rehabilitation services, however, requires health care workers to possess a set of specially trained knowledge and skills. Most developing countries, including China, do not have specially trained mental health personnel. The purpose of this study was to test the feasibility and efficacy of a community psychiatric rehabilitation program delivered by laypeople. Method: We conducted a randomized controlled study. Patients at two sites in Chengdu, China, were randomly assigned to either the laypeople-delivered (LPD) community psychiatric rehabilitation group (N = 49) or the drop-in center control group (N = 45). The outcomes were changes in symptoms, social functioning, and family functioning over 6 months, as measured by the Positive and Negative Syndrome Scale (PANSS), the Personal and Social Performance Scale (PSP), the Family Burden Scale of Disease (FBS), and the Family APGAR index. Results: The number of sessions received over the 12-week period of treatment ranged from 20 to 100%, with a mean completion rate of 77.32% for all 12 sessions. Statistically significant interactions between group and time were found for the total PANSS [F (2, 94) = 12.51, p < 0.001] and both the Negative PANSS [F (2, 94) = 5.89, p < 0.01] and Positive PANSS [F (2, 94) = 6.65, p < 0.01] as well as the PSP [F (2, 94) = 3.34, p < 0.05], FBS [F (2, 94) = 5.10, p < 0.01], and Family APGAR index [F (2, 94) = 4.58, p < 0.01]. The results showed that the experimental group outperformed their counterparts in symptom management, personal social functioning, family care burden, and coherence. Conclusion: These results support the feasibility and efficacy of having laypeople deliver psychiatric rehabilitation services. A discussion and limitations of the study have been included.
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OBJECTIVE: To analyze the effectiveness of exercise interventions on falls and fall-related fracture prevention among community-dwelling elderlies. METHODS: Literature search was conducted in Pubmed and Embase. Keywords used for literature search were "fracture" AND "fall" AND "exercise". Randomized controlled trials involving community-dwelling elderlies older than 60 years old with physical exercises as intervention were included. A systematic review and meta-analysis was performed. The primary outcomes were falls and fractures. RESULTS: Twelve studies were included and 4784 participants were involved with a mean age of 75.4. The most common exercise interventions were strength and balance exercises. The results of meta-analysis of 11 studies showed that exercise intervention had beneficial effect on fall prevention (RR = 0.71, 95% CI, 0.62-0.82; I2 = 24%, p < 0.0001). The effect was better when exercise intervention applied to women participants (RR = 0.64, 95% CI, 0.49-0.83; I2 = 28%, p = 0.00009) compared to men and women participants (RR = 0.75, 95% CI, 0.64-0.89; I2 = 24%, p = 0.001). The results of meta-analysis of seven studies showed that physical exercise had significant effect on fracture prevention (RR = 0.54, 95% CI, 0.35-0.83; I2 = 25%, p = 0.005). However, the effect was significant when exercise intervention applied to women participants only (RR = 0.37, 95% CI, 0.20-0.67; I2 = 0%, p = 0.001) but not significant when exercise intervention applied to both genders (RR = 0.80, 95% CI, 0.58-1.09; I2 = 0%, p = 0.15). CONCLUSION: Exercise interventions, especially the combination of strength and balance training, were effective in preventing falls. Resistance exercises and jumping exercises were effective for fracture prevention among community-dwelling older population. The effectiveness of exercise interventions on fracture prevention have more significant effect on women. Further studies are needed to test the effectiveness of exercise interventions in men. TRANSLATIONAL POTENTIAL: The use of effective exercises or biophysical interventions including vibration therapy can be incorporated into Fracture Liaison Services to prevent future fall and fracture.
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Fracture healing is a well-orchestrated and coordinated process and begins with the inflammatory stage involving the infiltration of immune cells and the release of cytokines, including tumour necrosis factor-alpha (TNF-α), interleukin-6 (IL-6) and interleukin-10 (IL-10). Low-magnitude high-frequency vibration (LMHFV) stimulation is effective in promoting fracture healing. The study hypothesis was that the innate immune response was impaired in osteoporotic fracture and LMHFV could positively modulate it. 9-month-old ovariectomy (OVX)-induced osteoporotic rats were randomised into sham (SHAM), OVX control (OVX), OVX-vibration (OVX-VT) or OVX vibration plus administration of COX-2 specific non-steroid anti-inflammatory drugs (OVX-VT-NSAID). LMHFV (35 Hz, 0.3 g) was given 20 min/d and 5 d/week to the treatment groups. Healing and innate immune response were evaluated by weekly radiographs, endpoint micro-computed tomography (µCT), enzyme-linked immunosorbent assay (ELISA) and histomorphometry at weeks 1, 2, 4 and 8 post-treatment. Results showed that OVX slightly elevated systemic inflammation but impaired the innate immune response locally at the fracture site, with significantly lower expressions of TNF-α and IL-6 but higher IL-10 expression during the early stage of healing. LMHFV was effective in accelerating the delayed fracture healing in OVX bones by partly restoring the impaired innate immune response at the fracture site, accompanied by promoted progression of macrophage polarisation from M1 (pro-inflammatory) to M2 (anti-inflammatory) phenotype. In conclusion, vibration treatment could positively modulate the impaired innate immune response and promote macrophage polarisation in osteoporotic-fracture healing.
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Consolidação da Fratura , Macrófagos/citologia , Fraturas por Osteoporose/terapia , Vibração/uso terapêutico , Animais , Diferenciação Celular , Estrogênios/deficiência , Feminino , Imunidade Inata , Interleucina-10/genética , Interleucina-10/metabolismo , Macrófagos/metabolismo , Fraturas por Osteoporose/etiologia , Ratos , Ratos Sprague-DawleyRESUMO
Most osteoporotic fractures occur at metaphyseal regions of long bones. The present study proposed a clinically relevant animal model that satisfied: i) induction of osteoporosis, ii) unilateral complete osteotomy at metaphysis, iii) internal fixation. 6 months old female Sprague-Dawley rats (n = 64) were randomly divided into the ovariectomised-metaphyseal osteotomy (OVX, n = 32) and metaphyseal osteotomy (SHAM, n = 32) groups. The metaphyseal-osteotomy model was created with a plate-fixation of the osteotomy and assessed by X-ray, micro-computed tomography, histomorphometry and mechanical testing at weeks 1, 3 and 6. X-ray results showed complete healing of metaphyseal osteotomy at week 6. Histology showed 3 stages of metaphyseal healing. Stage 1 was characterised by fibrous tissue, consisting of disorganised orientation of collagen fibres, and infiltration of immune cells. At stage 2, a transitional zone consisting of maturing fibrous tissue and differentiating mesenchymal cells with early trabecular bone formation and disorganised woven bone were observed. During stage 3, cortical bone ends unified and woven bone underwent transformation to lamellar bone. OVX group healing was significantly delayed when compared to SHAM samples. The study demonstrated that healing of osteoporotic osteotomy at the metaphyseal region was delayed in terms of radiography, histomorphometry and mechanical strength. These quantitative evaluations, along with histological features, may provide key references for future studies. The animal model may provide additional clinical relevance as most osteoporotic fracture in humans occurs at metaphyseal regions.
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Osso e Ossos/fisiopatologia , Osteoporose/fisiopatologia , Fraturas por Osteoporose/fisiopatologia , Animais , Modelos Animais de Doenças , Feminino , Fixação Interna de Fraturas/métodos , Consolidação da Fratura/fisiologia , Osteotomia/métodos , Ratos , Ratos Sprague-Dawley , Microtomografia por Raio-X/métodosRESUMO
Dry eye disease is one of the most common ophthalmic complaints; it results from the activity of various pathways and is considered a multifactorial disease. An important factor that contributes to the onset of dry eye disease is meibomian gland dysfunction. Meibomian gland dysfunction causes a disruption in the tear film lipid layer which affects the rate of tear evaporation. This evaporation leads to tear hyperosmolarity, eventually triggering the onset of dry eye disease. Dry eye disease and meibomian gland dysfunction are strongly associated with each other, such that many of their risk factors, signs, and symptoms overlap. This review aimed to provide an update on the association between dry eye disease and meibomian gland dysfunction. A stepwise approach for diagnosis and management is summarised.
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Síndromes do Olho Seco/etiologia , Doenças Palpebrais/etiologia , Glândulas Tarsais/patologia , Diagnóstico por Imagem/instrumentação , Síndromes do Olho Seco/diagnóstico por imagem , Síndromes do Olho Seco/terapia , Doenças Palpebrais/diagnóstico por imagem , Doenças Palpebrais/terapia , Corantes Fluorescentes/administração & dosagem , Humanos , Glândulas Tarsais/diagnóstico por imagem , Ensaios Clínicos Controlados Aleatórios como Assunto , Fatores de Risco , Lâmpada de Fenda , Coloração e Rotulagem , Lágrimas/fisiologiaRESUMO
Sarcopenia is a common geriatric syndrome characterized by progressive decrease of muscle mass and function leading to an increased risk of physical disability, poor quality of life, and mortality. Increasing evidence shows that sarcopenia is related with fragility fractures. This systematic review aimed to summarize the following: (1) the prevalence of sarcopenia in patients with fragility fracture and (2) the associated risk factors for fragility fracture in patients with sarcopenia. Literature search was conducted in PubMed and Cochrane databases. Studies with the prevalence of sarcopenia in elderly patients with fragility fracture and associated risk factors in patients with sarcopenia were included. A total of 15 papers were included, with 10 reporting sarcopenia prevalence, and 5 on fracture risk in patients with sarcopenia. The prevalence of sarcopenia after fracture ranged from 12.4 to 95% in males and 18.3 to 64% in females. The prevalence of sarcopenia in elderly patients with fragility fracture was high, especially in men. Two studies showed that sarcopenia was a risk factor for fragility fracture when associated with low bone mineral density (BMD) but only in men. Caution should be taken for male patients with sarcopenia and low BMD, which is related to significantly increased risk of fractures. There is a pressing need for further research on sarcopenia and its risk on fragility fracture to better understand the relationship, pathophysiology, and mechanisms, which may shed light on potential interventions to improve clinical outcomes.
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Fraturas por Osteoporose/etiologia , Sarcopenia/complicações , Densidade Óssea/fisiologia , Humanos , Fraturas por Osteoporose/epidemiologia , Fraturas por Osteoporose/fisiopatologia , Prevalência , Fatores de Risco , Sarcopenia/epidemiologia , Sarcopenia/fisiopatologiaRESUMO
OBJECTIVES: Rapid and accurate sexually transmitted infection diagnosis can reduce onward transmission and improve treatment efficacy. We evaluated the accuracy of a 15-minute run-time recombinase polymerase amplification-based prototype point-of-care test (TwistDx) for Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG). METHODS: Prospective, multicentre study of symptomatic and asymptomatic patients attending three English sexual health clinics. Research samples provided were additional self-collected vulvovaginal swab (SCVS) (female participants) and first-catch urine (FCU) aliquot (female and male participants). Samples were processed blind to the comparator (routine clinic CT/NG nucleic acid amplification test (NAAT)) results. Discrepancies were resolved using Cepheid CT/NG GeneXpert. RESULTS: Both recombinase polymerase amplification and routine clinic NAAT results were available for 392 male and 395 female participants. CT positivity was 8.9% (35/392) (male FCU), 7.3% (29/395) (female FCU) and 7.1% (28/395) (SCVS). Corresponding NG positivity was 3.1% (12/392), 0.8% (3/395) and 0.8% (3/395). Specificity and positive predictive values were 100% for all sample types and both organisms, except male CT FCU (99.7% specificity (95% confidence interval (CI) 98.4-100.0; 356/357), 97.1% positive predictive value (95% CI 84.7-99.9; 33/34)). For CT, sensitivity was ≥94.3% for FCU and SCVS. CT sensitivity for female FCU was higher (100%; 95% CI, 88.1-100; 29/29) than for SCVS (96.4%; 95% CI, 81.7-99.9; 27/28). NG sensitivity and negative predictive values were 100% in FCU (male and female). CONCLUSIONS: This prototype test has excellent performance characteristics, comparable to currently used NAATs, and fulfils several World Health Organization ASSURED criteria. Its rapidity without loss of performance suggests that once further developed and commercialized, this test could positively affect clinical practice and public health.
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Chlamydia trachomatis/isolamento & purificação , Neisseria gonorrhoeae/isolamento & purificação , Técnicas de Amplificação de Ácido Nucleico/normas , Testes Imediatos , Infecções Sexualmente Transmissíveis/diagnóstico , Adolescente , Adulto , Idoso , Instituições de Assistência Ambulatorial , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Sensibilidade e Especificidade , Manejo de Espécimes , Adulto JovemRESUMO
The first conception outside of the human body that led to the birth of Louise Brown was a tremendous accomplishment, which opened the door to the utilization of assisted reproductive techniques globally. This brought the understanding that accomplishing life in a dish required several steps, the most obvious being the timing and characteristics of fertilization. It soon became obvious in the 1980s that the most disappointing phenomenon was unexpected and complete fertilization failure. Among the approaches that were attempted to treat male factor infertility, ICSI surfaced as the technique that brought the ratio of the gametes to 1:1 and was also able to grant consistent fertilization and a higher pregnancy rate. ICSI has now been implemented for a quarter of a century, proving itself as the ultimate technique utilizing ejaculated spermatozoa independent of the semen parameters and is the sole insemination method to be used with surgically retrieved spermatozoa. There are currently various indications for ICSI that are widely adopted, rendering it the most popular insemination method worldwide. The reliability of ICSI ensures its employment in upcoming techniques involving in vitro spermatogenesis and neogametogenesis.
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Injeções de Esperma Intracitoplásmicas/métodos , Espermatozoides , Feminino , Humanos , Masculino , Gravidez , Taxa de Gravidez , Análise do SêmenRESUMO
This study clarifies the location, size and age at the onset of metamorphosis in Japanese eels Anguilla japonica through oceanic surveys, rearing experiments and analyses of the morphology and otoliths of leptocephali and glass eels. Twenty-eight metamorphosing leptocephali were collected in the mesoscale eddy region to the east of Taiwan during research expeditions in 2004. Rearing experiments showed that the total length (LT ) of leptocephali decreased by an average of 12·5% during metamorphosis and 13·9% during the 2-12 h after death. Thus, the mean back-calculated LT at the onset of metamorphosis for 630 glass eels from Taiwan and Japan was estimated at 67·8 ± 2·7 mm (mean ± S.D.). The estimated mean ante-mortem size of the fully grown pre-metamorphic leptocephali collected in 2004 was 64·6 ± 3·4 mm, which was consistent with the LT estimate for glass eels. Otolith analysis showed that the mean age at the onset of metamorphosis was 137 ± 15 days and indicated that Japanese eels may have a recruitment route through the mesoscale eddies to the east of Taiwan in addition to the direct transfer route from the North Equatorial Current to the Kuroshio Current.
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Anguilla/crescimento & desenvolvimento , Metamorfose Biológica , Determinação da Idade pelo Esqueleto , Fatores Etários , Animais , Tamanho Corporal , Japão , Oceano Pacífico , TaiwanRESUMO
Gastroesophageal reflux disease and esophageal dysmotility are prevalent in patients with advanced lung disease and are associated with graft dysfunction following lung transplantation. As a result, many transplant centers perform esophageal function testing as part of the wait-listing process but guidelines for testing in this population are lacking. The aim of this study is to describe whether symptoms of gastroesophageal reflux correlate with abnormal results on pH-metry and high-resolution manometry and can be used to identify those who require testing. We performed a retrospective cohort study of 226 lung transplant candidates referred for high-resolution manometry and pH-metry over a 12-month period in 2015. Demographic data, results of a standard symptom questionnaire and details of esophageal function testing were obtained. Associations between the presence of symptoms and test results were analyzed using Fisher's exact tests and multivariable logistic regression. The most common lung disease diagnosis was interstitial lung disease (N = 131, 58%). Abnormal pH-metry was seen in 116 (51%) patients and the presence of symptoms was significantly associated with an abnormal study (p < 0.01). Dysmotility was found in 98 (43%) patients, with major peristaltic or esophageal outflow disorders in 45 (20%) patients. Symptoms were not correlated with findings on esophageal high-resolution manometry. Fifteen of 25 (60%) asymptomatic patients had an abnormal manometry or pH-metry. These results demonstrate that in patients with advanced lung disease, symptoms of gastroesophageal reflux increase the likelihood of elevated acid exposure on pH-metry but were not associated with dysmotility. Given the proportion of asymptomatic patients with abnormal studies and associated post-transplant risks, a practice of universal high-resolution manometry and pH-metry testing in this population is justifiable.
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Transtornos da Motilidade Esofágica , Monitoramento do pH Esofágico/métodos , Refluxo Gastroesofágico , Transplante de Pulmão , Manometria/métodos , Complicações Pós-Operatórias/prevenção & controle , Adulto , Transtornos da Motilidade Esofágica/complicações , Transtornos da Motilidade Esofágica/diagnóstico , Transtornos da Motilidade Esofágica/fisiopatologia , Esôfago/fisiopatologia , Feminino , Refluxo Gastroesofágico/complicações , Refluxo Gastroesofágico/diagnóstico , Refluxo Gastroesofágico/fisiopatologia , Humanos , Pneumopatias/cirurgia , Transplante de Pulmão/efeitos adversos , Transplante de Pulmão/métodos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Estudos RetrospectivosRESUMO
BACKGROUND: Rapid Point-Of-Care Tests for Chlamydia trachomatis (CT) may reduce onward transmission and reproductive sexual health (RSH) sequelae by reducing turnaround times between diagnosis and treatment. The io® single module system (Atlas Genetics Ltd.) runs clinical samples through a nucleic acid amplification test (NAAT)-based CT cartridge, delivering results in 30min. METHODS: Prospective diagnostic accuracy study of the io® CT-assay in four UK Genito-Urinary Medicine (GUM)/RSH clinics on additional-to-routine self-collected vulvovaginal swabs. Samples were tested "fresh" within 10days of collection, or "frozen" at -80°C for later testing. Participant characteristics were collected to assess risk factors associated with CT infection. RESULTS: CT prevalence was 7.2% (51/709) overall. Sensitivity, specificity, positive and negative predictive values of the io® CT assay were, respectively, 96.1% (95% Confidence Interval (CI): 86.5-99.5), 97.7% (95%CI: 96.3-98.7), 76.6% (95%CI: 64.3-86.2) and 99.7% (95%CI: 98.9-100). The only risk factor associated with CT infection was being a sexual contact of an individual with CT. CONCLUSIONS: The io® CT-assay is a 30-min, fully automated, high-performing NAAT currently CE-marked for CT diagnosis in women, making it a highly promising diagnostic to enable specific treatment, initiation of partner notification and appropriately intensive health promotion at the point of care.
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Infecções por Chlamydia/diagnóstico , Infecções por Chlamydia/microbiologia , Chlamydia trachomatis/fisiologia , Genitália/microbiologia , Técnicas de Amplificação de Ácido Nucleico/métodos , Sistemas Automatizados de Assistência Junto ao Leito , Feminino , Humanos , Estudos Prospectivos , Padrões de Referência , Fatores de RiscoRESUMO
OBJECTIVES: The treatment of osteoporotic fractures is a major challenge, and the enhancement of healing is critical as a major goal in modern fracture management. Most osteoporotic fractures occur at the metaphyseal bone region but few models exist and the healing is still poorly understood. A systematic review was conducted to identify and analyse the appropriateness of current osteoporotic metaphyseal fracture animal models. MATERIALS AND METHODS: A literature search was performed on the Pubmed, Embase, and Web of Science databases, and relevant articles were selected. A total of 19 studies were included. Information on the animal, induction of osteoporosis, fracture technique, site and fixation, healing results, and utility of the model were extracted. RESULTS: Fracture techniques included drill hole defects (3 of 19), bone defects (3 of 19), partial osteotomy (1 of 19), and complete osteotomies (12 of 19). Drill hole models and incomplete osteotomy models are easy to perform and allow the study of therapeutic agents but do not represent the usual clinical setting. Additionally, biomaterials can be filled into drill hole defects for analysis. Complete osteotomy models are most commonly used and are best suited for the investigation of therapeutic drugs or noninvasive interventions. The metaphyseal defect models allow the study of biomaterials, which are associated with complex and comminuted osteoporotic fractures. CONCLUSION: For a clinically relevant model, we propose that an animal model should satisfy the following criteria to study osteoporotic fracture healing: 1) induction of osteoporosis, 2) complete osteotomy or defect at the metaphysis unilaterally, and 3) internal fixation.Cite this article: R. M. Y. Wong, M. H. V. Choy, M. C. M. Li, K-S. Leung, S. K-H. Chow, W-H. Cheung, J. C. Y. Cheng. A systematic review of current osteoporotic metaphyseal fracture animal models. Bone Joint Res 2018;7:6-11. DOI: 10.1302/2046-3758.71.BJR-2016-0334.R2.
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The leucine aminopeptidase inhibitor, benzyloxycarbonyl-leucine-chloromethylketone (z-L-CMK), was found to be toxic and readily induce cell death in Jurkat T cells. Dose-response studies show that lower concentration of z-L-CMK induced apoptosis in Jurkat T cells whereas higher concentration causes necrosis. In z-L-CMK-induced apoptosis, both the initiator caspases (-8 and -9) and effector caspases (-3 and -6) were processed to their respective subunits. However, the caspases remained intact in z-L-CMK-induced necrosis. The caspase inhibitor, z-VAD-FMK inhibited z-L-CMK-mediated apoptosis and caspase processing but has no effect on z-L-CMK-induced necrosis in Jurkat T cells. The high mobility group protein B1 (HMGB1) protein was found to be released into the culture medium by the necrotic cells and not the apoptotic cells. These results indicate that the necrotic cell death mediated by z-L-CMK at high concentrations is via classical necrosis rather than secondary necrosis. We also demonstrated that cell death mediated by z-L-CMK was associated with oxidative stress via the depletion of intracellular glutathione (GSH) and increase in reactive oxygen species (ROS), which was blocked by N-acetyl cysteine. Taken together, the results demonstrated that z-L-CMK is toxic to Jurkat T cells and induces apoptosis at low concentrations, while at higher concentrations the cells die of necrosis. The toxic side effects in Jurkat T cells mediated by z-L-CMK are associated with oxidative stress via the depletion of GSH and accumulation of ROS.
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Clorometilcetonas de Aminoácidos/toxicidade , Apoptose/efeitos dos fármacos , Leucil Aminopeptidase/antagonistas & inibidores , Necrose/induzido quimicamente , Estresse Oxidativo/efeitos dos fármacos , Inibidores de Proteases/toxicidade , Linfócitos T/efeitos dos fármacos , Clorometilcetonas de Aminoácidos/antagonistas & inibidores , Biomarcadores/metabolismo , Inibidores de Caspase/farmacologia , Caspases/química , Caspases/metabolismo , Forma do Núcleo Celular/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Glutationa/antagonistas & inibidores , Glutationa/metabolismo , Humanos , Células Jurkat , Leucil Aminopeptidase/metabolismo , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Nucleossomos/efeitos dos fármacos , Nucleossomos/imunologia , Nucleossomos/metabolismo , Concentração Osmolar , Fragmentos de Peptídeos/metabolismo , Inibidores de Proteases/química , Proteólise/efeitos dos fármacos , Linfócitos T/citologia , Linfócitos T/imunologia , Linfócitos T/metabolismoRESUMO
INTRODUCTION: Surgery for hip fracture may be performed out-of-hours to avoid surgical delay. There is, however, a perception that this may constitute less-than-ideal conditions and result in a poorer outcome. The aim of this study was to evaluate the surgical outcome of elderly patients with hip fracture who underwent daytime versus out-of-hours surgery in Hong Kong. This will help make decisions about whether to operate out-of-hours or to delay surgery until the following day. METHODS: This retrospective study included all elderly patients with hip fracture who were operated on and discharged from the Prince of Wales Hospital in 2014. Patients were divided into groups according to the time of surgical incision. Records were examined for 30-day mortality and postoperative surgical complications, and their potential associations with surgeon characteristics. RESULTS: Overall, 367 patients were selected in this study with 242 patients in the daytime group and 125 in the out-of-hours group. Demographic characteristics were comparable between the two groups. The overall 30-day mortality rate was 2.0% and the surgical complication rate was 24.2%. Compared with the daytime group, there was no increase in 30-day mortality or surgical complications for out-of- hours group. Fewer surgeons were involved in out-of-hours surgery but the number of surgeons and their qualifications did not affect the outcomes. CONCLUSIONS: The two groups were homogeneous in terms of demographic characteristics. Outcomes for 30-day mortality and postoperative surgical complications were comparable between the two groups. Surgeons' qualifications and number of surgeons involved were also not associated with the outcomes. Out-of-hours surgery remains a viable option in order to facilitate early surgery.
Assuntos
Emergências , Fraturas do Quadril/mortalidade , Fraturas do Quadril/cirurgia , Admissão e Escalonamento de Pessoal , Complicações Pós-Operatórias/epidemiologia , Plantão Médico , Idoso , Idoso de 80 Anos ou mais , Feminino , Hong Kong/epidemiologia , Humanos , Masculino , Estudos Retrospectivos , Fatores de Tempo , Resultado do TratamentoRESUMO
OBJECTIVES: Self-determination is viewed as an important ingredient of successful recovery in psychiatric rehabilitation. The concept of autonomy, a key component of self-determination, may be of less importance in Chinese cultures, whereby an individual's choices may be in conflict with the family's expectations. This study aimed to develop an instrument to measure opinions about self-determination among Chinese consumers and their family members. METHODS: A 27-item questionnaire, the Consumer and Family Decision Making Scale (CFDMS), was constructed to measure consumers' and family members' views of self-determination in various aspects of daily life. A total of 364 (182 consumers of psychiatric services with a diagnosis of schizophrenia and 182 of their family members) participated in the study. RESULTS: The CFDMS was found to possess good psychometric properties and appears to be a reliable and valid instrument for assessment of consumers' decision making. (The Cronbach's alphas of psychiatric care and treatment factor, personal and social function factor, community and daily living factor, and money management factor were as follows: .86, .89, .87 and .76. The respective test-retest reliabilities were as follows: .81, .89, .80, and .88). Chinese consumers preferred autonomous decision making in regard to personal and social functioning and community and daily living but preferred to defer decisions regarding psychiatric care and treatment and money management to others. Family members and consumers had similar views. CONCLUSIONS: Deferring decisions to family members is common in Chinese families. The emphasis on autonomy in Western health care may need to be reconsidered in the treatment of Chinese consumers. Chinese families have a strong influence on treatment decisions, and providers must respect this style and remain nonjudgmental when dealing with situations or decisions that may be contradictory to their own culture and values.