Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 49
Filtrar
1.
Support Care Cancer ; 32(7): 432, 2024 Jun 14.
Artigo em Inglês | MEDLINE | ID: mdl-38874678

RESUMO

PURPOSE: Upper gastrointestinal (GI) cancers contribute to 16.7% of UK cancer deaths. These patients make high use of acute hospital services, but detail about palliative care use is lacking. We aimed to determine the patterns of use of acute hospital and hospital specialist palliative care services in patients with advanced non-curative upper GI cancer. METHODS: We conducted a service evaluation of hospital use and palliative care for all patients with non-curative upper GI cancer seen in one large hospital, using routinely collected data (2019-2022). We report and characterise hospital admissions and palliative care within the study time period, using descriptive statistics, and multivariable Poisson regression to estimate the unadjusted and adjusted incidence rate ratio of hospital admissions. RESULTS: The total with non-curative upper GI cancer was 960. 86.7% had at least one hospital admission, with 1239 admissions in total. Patients had a higher risk of admission to hospital if: aged ≤ 65 (IRR for 66-75 years 0.71, IRR 76-85 years 0.68; IRR > 85 years 0.53; p < 0.05), or lived in an area of lower socioeconomic status (IMD Deciles 1-5) (IRR 0.90; p < 0.05). Over the 4-year period, the rate of re-admission was higher in patients not referred to palliative care (rate 0.52 readmissions/patient versus rate 1.47 readmissions/patient). CONCLUSION: People with advanced non-curative gastrointestinal cancer have frequent hospital admissions, especially if younger or from areas of lower socioeconomic status. There is clear association between specialist palliative care referral and reduced risk of hospitalisation. This evidence supports referral to specialist palliative care.


Assuntos
Neoplasias Gastrointestinais , Hospitalização , Cuidados Paliativos , Humanos , Cuidados Paliativos/estatística & dados numéricos , Cuidados Paliativos/métodos , Idoso , Masculino , Feminino , Idoso de 80 Anos ou mais , Neoplasias Gastrointestinais/terapia , Pessoa de Meia-Idade , Hospitalização/estatística & dados numéricos , Reino Unido , Adulto
3.
J Clin Microbiol ; 56(3)2018 03.
Artigo em Inglês | MEDLINE | ID: mdl-29237790

RESUMO

The use of high-risk human papillomavirus (HPV) testing for surveillance and clinical applications is increasing globally, and it is important that tests are evaluated to ensure they are fit for this purpose. In this study, the performance of a new HPV genotyping test, the Papilloplex high-risk HPV (HR-HPV) test, was compared to two well-established genotyping tests. Preliminary clinical performance was also ascertained for the detection of CIN2+ in a disease-enriched retrospective cohort. A panel of 500 cervical liquid-based cytology samples with known clinical outcomes were tested by the Papilloplex HR-HPV test. Analytical concordance was compared to two assays: a Linear Array (LA) HPV genotyping test and an Optiplex HPV genotyping test. The initial clinical performance for the detection for CIN2+ samples was performed and compared to that of two clinically validated HPV tests: a RealTime High-Risk HPV test (RealTime) and a Hybrid Capture 2 HPV test (HC2). High agreement for HR-HPV was observed between the Papilloplex and LA and Optiplex HPV tests (97 and 95%, respectively), with kappa values for HPV16 and HPV18 being 0.90 and 0.81 compared to the LA and 0.70 and 0.82 compared to the Optiplex test. The sensitivity, specificity, positive predictive value, and negative predictive value of the Papilloplex test for the detection of CIN2+ were 92, 54, 33, and 96%, respectively, and very similar to the values observed with RealTime and HC2. The Papilloplex HR-HPV test demonstrated a analytical performance similar to those of the two HPV genotyping tests at the HR-HPV level and the type-specific level. The preliminary data on clinical performance look encouraging, although further longitudinal studies within screening populations are required to confirm these findings.


Assuntos
Detecção Precoce de Câncer/métodos , Técnicas de Genotipagem/métodos , Técnicas de Diagnóstico Molecular/métodos , Papillomaviridae/genética , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/virologia , Kit de Reagentes para Diagnóstico/normas , Colo do Útero/virologia , DNA Viral/genética , Feminino , Genótipo , Humanos , Programas de Rastreamento , Reação em Cadeia da Polimerase Multiplex , Papillomaviridae/classificação , Infecções por Papillomavirus/patologia , Reprodutibilidade dos Testes , Estudos Retrospectivos , Sensibilidade e Especificidade , Especificidade da Espécie , Displasia do Colo do Útero/diagnóstico , Displasia do Colo do Útero/patologia , Displasia do Colo do Útero/virologia
4.
Br J Anaesth ; 119(4): 765-774, 2017 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-29121284

RESUMO

BACKGROUND: The objectives of this study were to evaluate the methodological quality of rigorous neuropathic pain assessment tools in applicable clinical studies, and determine the performance of screening tools for identifying neuropathic pain in patients with cancer. METHODS: Systematic literature search identified studies reporting use of Leeds Assessment of Neuropathic Symptoms and Signs (LANSS), Douleur Neuropathique en 4 (DN4) or painDETECT (PDQ) in cancer patients with a clinical diagnosis of neuropathic or not neuropathic pain. Individual patient data were requested to examine descriptor item profiles. RESULTS: Six studies recruited a total of 2301 cancer patients of which 1564 (68%) reported pain. Overall accuracy of screening tools ranged from 73 to 94%. There was variation in description and rigour of clinical assessment, particularly related to the rigour of clinical judgement of pain as the reference standard. Individual data from 1351 patients showed large variation in the selection of neuropathic pain descriptor items by cancer patients with neuropathic pain. LANSS and DN4 items characterized a significantly different neuropathic pain symptom profile from non-neuropathic pain in both tumour- and treatment-related cancer pain aetiologies. CONCLUSIONS: We identified concordance between the clinician diagnosis and screening tool outcomes for LANSS, DN4 and PDQ in patients with cancer pain. Shortcomings in relation to standardized clinician assessment are likely to account for variation in screening tool sensitivity, which should include the use of the neuropathic pain grading system. Further research is needed to standardize and improve clinical assessment in patients with cancer pain. Until the standardization of clinical diagnosis for neuropathic cancer pain has been validated, screening tools offer a practical approach to identify potential cases of neuropathic cancer pain.


Assuntos
Neoplasias/complicações , Neuralgia/diagnóstico , Neuralgia/etiologia , Medição da Dor/métodos , Humanos
5.
Br J Psychiatry ; 205(6): 478-85, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25359923

RESUMO

Background The frequency of full syndromal and subsyndromal delirium is understudied. Aims We conducted a point prevalence study in a general hospital. Method Possible delirium identified by testing for inattention was evaluated regarding delirium status (full/subsyndromal delirium) using categorical (Confusion Assessment Method (CAM), DSM-IV) and dimensional (Delirium Rating Scale-Revised-98 (DRS-R98) scores) methods. Results In total 162 of 311 patients (52%) screened positive for inattention. Delirium was diagnosed in 55 patients (17.7%) using DSM-IV, 52 (16.7%) using CAM and 58 (18.6%) using DRS-R98⩾12 with concordance for 38 (12.2%) individuals. Subsyndromal delirium was identified in 24 patients (7.7%) using a DRS-R98 score of 7-11 and 41 (13.2%) using 2/4 CAM criteria. Subsyndromal delirium with inattention (v. without) had greater disturbance of multiple delirium symptoms. Conclusions The point prevalence of delirium and subsyndromal delirium was 25%. There was modest concordance between DRS-R98, DSM-IV and CAM delirium diagnoses. Inattention should be central to subsyndromal delirium definitions.


Assuntos
Programas de Rastreamento , Avaliação de Sintomas/métodos , Idoso , Idoso de 80 Anos ou mais , Confusão/diagnóstico , Confusão/etiologia , Estudos Transversais , Delírio/complicações , Delírio/diagnóstico , Delírio/epidemiologia , Delírio/psicologia , Manual Diagnóstico e Estatístico de Transtornos Mentais , Feminino , Humanos , Irlanda/epidemiologia , Masculino , Programas de Rastreamento/métodos , Programas de Rastreamento/normas , Programas de Rastreamento/estatística & dados numéricos , Pessoa de Meia-Idade , Testes Neuropsicológicos/normas , Testes Neuropsicológicos/estatística & dados numéricos , Gravidade do Paciente , Prevalência , Escalas de Graduação Psiquiátrica , Centros de Atenção Terciária/estatística & dados numéricos
6.
Support Care Cancer ; 22(10): 2615-20, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24733635

RESUMO

PURPOSE: It is recommended that patients with multiple myeloma should be assessed for unmet holistic needs at key times in their disease trajectory. The aim of this exploratory study was to characterise the holistic needs of advanced, intensively treated multiple myeloma using a structured assessment tool. METHODS: Patients with multiple myeloma who had undergone a haematopoietic stem cell transplantation and subsequent treatment for at least one episode of progressive disease but were in stable plateau phase were included in the study. Patients' holistic needs were assessed using the self-reporting tool, Sheffield Profile for Assessment and Referral for Care (SPARC). RESULTS: Thirty-two patients with a median age of 60 years at assessment and a median of 5.5 years from diagnosis were recruited. Using the SPARC, half of the patients reported tiredness as 'quite a bit/very much,' while one third complained that daytime somnolence and insomnia were 'quite a bit/very much.' Forty-four percent of patients reported pain. One third of patients were bothered and distressed by the side effects from their treatment and were worried about long-term effects of their treatment. Thirty-one percent of patients felt that the effect of their condition had an impact on their sexual life, and 40 % were worried about the effect that their illness was having on their family or other people. CONCLUSION: This is the first study to use a self-reported holistic needs assessment tool in multiple myeloma. A multidimensional structured questionnaire like the SPARC could provide a useful first step in the effective delivery of supportive and palliative care for patients with multiple myeloma.


Assuntos
Mieloma Múltiplo/psicologia , Avaliação das Necessidades , Psicometria/instrumentação , Inquéritos e Questionários/normas , Adulto , Idoso , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/terapia
7.
Bone Marrow Transplant ; 49(7): 907-12, 2014 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-24710566

RESUMO

Modern treatment strategies have increased life expectancy in multiple myeloma, but little is known about the endocrine, metabolic and nutritional status of long-term survivors. We performed endocrine, metabolic, bone, body composition and nutritional evaluations in 32 patients with intensively-treated, advanced but stable, myeloma a median duration of 6 years from diagnosis and three lines of intensive treatment, including at least one haematopoietic SCT procedure. All patients were off active treatment. There was a high prevalence of endocrine dysfunction: hypothyroidism (9%), hypogonadism (65% males) and elevated prolactin (19%). Adrenocortical function was preserved despite large cumulative corticosteroid pretreatment. Biochemical markers were consistent with postmenopausal status in all females and infertility in males. Nutritionally, 59% were vitamin D insufficient/deficient, reduced serum folate in 25% and vitamin B12 in 6%. Total body DEXA scanning confirmed 'sarcopenic-obesity' in 65%, but reduced bone density was seen in a minority. We conclude that potentially correctable endocrine, metabolic and nutritional abnormalities are prevalent in heavily-treated patients with stable multiple myeloma. Preservation of bone supports the efficacy of bisphosphonate treatment from diagnosis, but sarcopenic-obesity may contribute to frailty. Ultimately, multi-system screening and appropriate interventions may optimise quality of long-term survival and further studies are warranted.


Assuntos
Mieloma Múltiplo/metabolismo , Mieloma Múltiplo/terapia , Adulto , Idoso , Composição Corporal , Estudos Transversais , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/imunologia , Mieloma Múltiplo/patologia , Estado Nutricional
8.
Transplant Proc ; 43(9): 3256-61, 2011 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-22099770

RESUMO

Immunoisolation strategies have the potential to impact the treatment of several diseases, such as hemophilia, Parkinson's and endocrine disorders, such as parathryroid disorders and diabetes. The hallmark of these disease states is the amelioration of the disease process by replacement of the deficient protein. Naturally, several cellular therapeutic strategies like genetically modified host cells, stem cells, donor cells, or even complex tissues like pancreatic islets have been investigated. Current evidence suggests that successful strategies must incorporate considerations for local hypoxia, vascularity, and immunoisolation. Additional regulatory concerns also include safe localization of implanted therapeutic cells to allow for monitoring, dose adjustment, or removal when indicated. Local hypoxia and cellular toxicity can be detrimental to the survival of freshly implanted pancreatic islets, leading to a need for a larger initial number of islets or repeated implantation procedures. The lack of adequate donors and the large number of islet equivalents needed to achieve euglycemic states amplify the nature of this problem. We have developed a novel immunoisolation device based on electrospun nylon, primarily for islet transplantation, such that the inner component functions as a cellular barrier while allowing diffusion, whereas the outer component can be optimized for tissue integration and accelerated vascularization. Devices explanted after subcutaneous implantation in wild-type B6 mice after a period of 30 days show vascular elements in the outer layer of the electrospun device. The inner layer when intact functioned as an effective barrier to cellular infiltration. The preimplantation of such a device, with a relatively thin inner barrier membrane, will allow for adequate vascularization and reduce postimplantation hypoxia. This study demonstrates the feasibility of an electrospun isolation device that can be easily assembled, modified by varying the electrospinning parameters, and functionalized with surface-active molecules to accelerate vascularization.


Assuntos
Separação Celular/métodos , Transplante das Ilhotas Pancreáticas/métodos , Animais , Técnicas de Cultura de Células , Separação Celular/instrumentação , Micropartículas Derivadas de Células , Hipóxia , Imuno-Histoquímica/métodos , Insulina/metabolismo , Transplante das Ilhotas Pancreáticas/instrumentação , Membranas Artificiais , Camundongos , Microscopia Eletrônica de Varredura/métodos , Porosidade , Transplante Heterólogo/métodos
9.
Anim Reprod Sci ; 116(1-2): 19-27, 2009 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-19217227

RESUMO

Cloned animals often suffer from loss of development to term and abnormalities, typically classified under the umbrella term of Large Offspring Syndrome (LOS). Cattle are an interesting species to study because of the relatively greater success rate of nuclear transfer in this species compared with all species cloned to date. The imprinted insulin-like growth factor receptor (IGF2R; mannose-6-phosphate) gene was chosen to investigate aspects of fetal growth and development in cloned cattle in the present study. IGF2R gene expression patterns in identical genetic clones of several age groups were assessed in day 25, day 45, and day 75 fetuses as well as spontaneously aborted fetuses, calves that died shortly after birth and healthy cloned calves using single stranded conformational polymorphism gel electrophoresis. A variable pattern of IGF2R allelic expression in major organs such as the brain, cotyledon, heart, liver, lung, spleen, kidney and intercotyledon was observed using a G/A transition in the 3'UTR of IGF2R. IGF2R gene expression was also assessed by real time RT-PCR and found to be highly variable among the clone groups. Proper IGF2R gene expression is necessary for survival to term, but is most likely not a cause of early fetal lethality or an indicator of postnatal fitness. Contrary to previous reports of the transmission of imprinting patterns from somatic donor cells to cloned animals within organs in the same cloned animal the paternal allele of IGF2R can be imprinted in one tissue while the maternal allele is imprinted in another tissue. This observation has never been reported in any species in which imprinting has been studied.


Assuntos
Clonagem Molecular/métodos , Feto/fisiologia , Impressão Genômica , Receptor IGF Tipo 2/genética , Regiões 3' não Traduzidas/genética , Animais , Encéfalo/embriologia , Encéfalo/fisiologia , Bovinos , DNA/genética , Feminino , Regulação da Expressão Gênica , Idade Gestacional , Coração/embriologia , Coração/fisiologia , Fígado/embriologia , Fígado/fisiologia , Pulmão/embriologia , Pulmão/fisiologia , Masculino , Placenta/fisiologia , Polimorfismo de Nucleotídeo Único , Gravidez , RNA/genética , Pele , Baço/embriologia , Baço/fisiologia
10.
Am J Hum Genet ; 82(4): 916-26, 2008 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-18374296

RESUMO

We report fluorescence in situ hybridization (FISH) mapping of 152, mostly de novo, apparently balanced chromosomal rearrangement (ABCR) breakpoints in 76 individuals, 30 of whom had no obvious phenotypic abnormality (control group) and 46 of whom had an associated disease (case group). The aim of this study was to identify breakpoint characteristics that could discriminate between these groups and which might be of predictive value in de novo ABCR (DN-ABCR) cases detected antenatally. We found no difference in the proportion of breakpoints that interrupted a gene, although in three cases, direct interruption or deletion of known autosomal-dominant or X-linked recessive Mendelian disease genes was diagnostic. The only significant predictor of phenotypic abnormality in the group as a whole was the localization of one or both breakpoints to an R-positive (G-negative) band with estimated predictive values of 0.69 (95% CL 0.54-0.81) and 0.90 (95% CL 0.60-0.98), respectively. R-positive bands are known to contain more genes and have a higher guanine-cytosine (GC) content than do G-positive (R-negative) bands; however, whether a gene was interrupted by the breakpoint or the GC content in the 200 kB around the breakpoint had no discriminant ability. Our results suggest that the large-scale genomic context of the breakpoint has prognostic utility and that the pathological mechanism of mapping to an R-band cannot be accounted for by direct gene inactivation.


Assuntos
Aberrações Cromossômicas , Mapeamento Cromossômico , Doenças Genéticas Inatas/diagnóstico , Hibridização in Situ Fluorescente , Estudos de Casos e Controles , Humanos , Fenótipo , Prognóstico , Deleção de Sequência
11.
J Vet Intern Med ; 22(1): 53-9, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18289289

RESUMO

BACKGROUND: Nonsteroidal anti-inflammatory drugs (NSAIDs) do not always provide sufficient pain relief in dogs with osteoarthritis (OA). HYPOTHESIS: The use of amantadine in addition to NSAID therapy will provide improved pain relief when compared with the use of nonsteroidal analgesics alone in naturally occurring OA in dogs. ANIMALS: Thirty-one client-owned dogs with pelvic limb lameness despite the administration of an NSAID. METHODS: The study was randomized, blinded, and placebo controlled with parallel groups (days 21-42). On day 0, analgesic medications were discontinued. On day 7, all dogs received meloxicam for 5 weeks. On day 21, all dogs received amantadine (3-5 mg/kg once daily per os) or placebo for 21 days, in addition to receiving meloxicam. Assessments were performed before the study and on days 7, 21, and 42. Primary outcome measures were blinded owner assessments of activity using client-specific outcome measures (CSOM) on days 0, 7, 21, and 42. Data were analyzed by a mixed model approach. RESULTS: For CSOM activity, there was a significant time by treatment effect (P=.009). On the basis of the planned post hoc t-tests of postrandomization means, there was a significant difference between treatment groups on day 42 (P=.030), with the amantadine group being more active. CONCLUSIONS AND CLINICAL IMPORTANCE: In dogs with osteoarthritic pain refractory to an NSAID, physical activity is improved by the addition of amantadine. Amantadine might be a useful adjunct therapy for the clinical management of canine osteoarthritic pain.


Assuntos
Amantadina/uso terapêutico , Analgésicos não Narcóticos/uso terapêutico , Doenças do Cão/tratamento farmacológico , Osteoartrite/veterinária , Dor/veterinária , Amantadina/administração & dosagem , Animais , Doenças do Cão/etiologia , Cães , Método Duplo-Cego , Esquema de Medicação/veterinária , Feminino , Masculino , Osteoartrite/complicações , Osteoartrite/tratamento farmacológico , Dor/tratamento farmacológico , Dor/etiologia
12.
Theriogenology ; 68(8): 1128-37, 2007 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-17875317

RESUMO

This study was conducted to examine pregnancy progression and fetal characteristics following transfer of vitrified bovine nuclear transfer versus in vivo-derived embryos. Nuclear transfer (NT) was conducted using cumulus cells collected from an elite Holstein-Friesian dairy cow. Expanding and hatching blastocysts on Day 7 were vitrified using liquid nitrogen surface vitrification. Day 7 in vivo embryos, produced using standard superovulation procedures applied to Holstein-Friesian heifers (n=6), were vitrified in the same way. Following warming, embryos were transferred to synchronized recipients (NT: n=65 recipients; Vivo: n=20 recipients). Pregnancies were monitored by ultrasound scanning on Days 25, 45 and 75 and a sample of animals were slaughtered at each time point to recover the fetus/placenta for further analyses. Significantly more animals remained pregnant after transfer of in vivo-derived embryos than NT embryos at all time points: Day 25 (95.0 versus 67.7%, P<0.05), Day 45 (92.8 versus 49.1%, P<0.01) and Day 75 (70.0 versus 20.8%, P<0.0). There was no significant difference (P=0.10) in the weight of the conceptus on Day 25 from NT transfers (1.14+/-0.23 g, n=8) versus in vivo transfers (0.75+/-0.19 g, n=8). On Day 45, there was no significant difference in the weight of either fetus (P=0.393) or membranes (P=0.167) between NT embryos (fetus: 2.76+/-0.40, n=12; membranes: 59.0+/-10.0, n=11) or in vivo-derived embryos (fetus: 2.60+/-0.15, n=6; membranes: 41.8+/-5.2, n=4). However, on Day 75 the weight of the fetus and several of the major organs were heavier from NT embryos. These data suggest that morphological abnormalities involving the fetus and the placenta of cloned pregnancies are manifested after Day 45.


Assuntos
Bovinos/embriologia , Clonagem de Organismos/veterinária , Feto/anatomia & histologia , Técnicas de Transferência Nuclear/veterinária , Animais , Blastocisto/citologia , Bovinos/fisiologia , Transferência Embrionária/veterinária , Feminino , Peso Fetal , Técnicas de Transferência Nuclear/normas , Tamanho do Órgão , Gravidez , Taxa de Gravidez , Fatores de Tempo
13.
J Microencapsul ; 24(2): 109-16, 2007 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-17454422

RESUMO

The current method of choice for astronauts to treat space motion sickness is an intra-muscular injection of promethazine hydrochloride (PMZ HCl) which is invasive and causes considerable local irritation and discomfort at the site of injection. Intra-nasal delivery is considered a feasible alternative route for administration of medications to treat space motion sickness. The purpose of this research is to develop a PMZ HCl formulation that can be administered intra-nasally without irritation (i.e. leukocyte infiltration) in the nasal epithelium when dosed at PMZ HCl concentrations greater than the cytotoxic limit. The biocompatibility of PMZ HCl was tested in vitro and was shown to be cytotoxic at concentrations greater than 10(-5) molar regardless of pH. A controlled-release microencapsulated dosage formulation was developed using spinning disk atomization and release rates for the PMZ HCl microcapsules were determined in phosphate buffered saline. An animal study was conducted to determine the irritation response of rat nasal mucosa when dosed with encapsulated and non-encapsulated PMZ HCl.


Assuntos
Administração Intranasal , Cápsulas , Géis , Enjoo devido ao Movimento/prevenção & controle , Prometazina/administração & dosagem , Animais , Linhagem Celular , Sobrevivência Celular/efeitos dos fármacos , Portadores de Fármacos , Humanos , Pulmão , Mucosa Nasal/efeitos dos fármacos , Mucosa Nasal/patologia , Prometazina/toxicidade , Ratos
14.
J Microencapsul ; 22(7): 737-44, 2005 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-16421084

RESUMO

Use of microencapsulation technology in combination with absorption enhancers eliminated epithelium irritation and necrosis commonly associated with nasal delivery of cytotoxic therapeutic agents. Phenothiazines, such as ethopropazine (ETZ), promethazine, trimeprazine and propiomazine have been used for the treatment of allergenic conditions, motion sickness, nausea, Parkinson's disease, Prion disease and as a sedative for psychiatric disorders. The enantiomers of commercially available racemic phenothiazines were isolated and purified using classical diastereomeric salt techniques. The racemate and the enantiomers of ETZ were tested in vitro for their cellular toxicity using lung fibroblast cells. Each enantiomer was shown to be cytotoxic at concentrations greater than 10(-5) molar. The ETZ enantiomers were encapsulated using spinning disk atomization to prepare a nasal delivery dosage form that does not produce an irritation response. Release rates for the ETZ microcapsules were determined in vitro and an animal study was conducted to determine the irritation response of rat nasal mucosa when dosed with encapsulated vs. non-encapsulated ETZ.


Assuntos
Antimetabólitos/administração & dosagem , Mucosa Nasal/efeitos dos fármacos , Fenotiazinas/administração & dosagem , Animais , Composição de Medicamentos/métodos , Ácido Clorídrico/administração & dosagem , Mucosa Nasal/imunologia , Ratos , Ratos Sprague-Dawley , Estereoisomerismo
15.
Acta Biomater ; 1(4): 377-85, 2005 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-16701819

RESUMO

We characterize the infiltration of interstitial cells into tissue engineering scaffolds prepared with electrospun collagen, electrospun gelatin, electrospun poly(glycolic) acid (PGA), electrospun poly(lactic) acid (PLA), and an electrospun PGA/PLA co-polymer. Electrospinning conditions were optimized to produce non-woven tissue engineering scaffolds composed of individual fibrils less than 1000 nm in diameter. Each of these materials was then electrospun into a cylindrical construct with a 2 mm inside diameter with a wall thickness of 200-250 microm. Electrospun scaffolds of collagen were rapidly, and densely, infiltrated by interstitial and endothelial cells when implanted into the interstitial space of the rat vastus lateralis muscle. Functional blood vessels were evident within 7 days. In contrast, implants composed of electrospun gelatin or the bio-resorbable synthetic polymers were not infiltrated to any great extent and induced fibrosis. Our data suggests that topographical features, unique to the electrospun collagen fibril, promote cell migration and capillary formation.


Assuntos
Materiais Biocompatíveis/química , Eletroquímica/métodos , Ácido Láctico/química , Fibras Musculares Esqueléticas/fisiologia , Nanotubos/química , Ácido Poliglicólico/química , Polímeros/química , Engenharia Tecidual/métodos , Animais , Adesão Celular/fisiologia , Técnicas de Cultura de Células/métodos , Movimento Celular/fisiologia , Células Cultivadas , Teste de Materiais , Nanotubos/ultraestrutura , Tamanho da Partícula , Copolímero de Ácido Poliláctico e Ácido Poliglicólico , Ratos , Ratos Sprague-Dawley , Rotação
17.
Diabet Med ; 18(11): 864-70, 2001 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11703429

RESUMO

While treatment of Type 1 diabetes mellitus (T1DM) in children and adolescents is especially difficult, recent technological advances have provided new therapeutic options to clinicians and patients. The urgency to achieve strict diabetes control and the introduction of new and improved insulin pumps have been accompanied by a marked increase in use of continuous subcutaneous insulin infusion (CSII) therapy in youth with diabetes. Results of clinical outcome studies indicate that CSII provides a safe and effective alternative to multiple daily injection (MDI) therapy, even when employed in a regular clinic setting in a large number of children. The safety and efficacy of CSII is further enhanced by the introduction of lispro and aspart insulin. The sharper peaks and shorter duration of action of these very rapid-acting insulin analogues provides a means to achieve better control of post-prandial hyperglycaemia with less late post-prandial and nocturnal hypoglycaemia. Glargine insulin, a soluble and essentially peakless long-acting insulin analogue, may provide a better basal insulin for MDI regimens, but there are limited published data with this agent in children with T1DM. A number of systems for pulmonary delivery of insulin are in development and preliminary results of Phase III studies have been promising. Like CSII, inhaled insulin allows the child to take bolus insulin doses before each meal without having to take a premeal injection. A major obstacle to effective treatment is that self-monitoring of three to four blood glucose levels a day often misses the marked glycaemic excursions that characterize T1DM in young patients. On the other hand, new continuous glucose sensing systems provide a wealth of data that can be used to optimize basal and bolus therapy, regardless of how insulin is administered. Even more important, we may finally be at the threshold of development of a practically applicable artificial pancreas.


Assuntos
Diabetes Mellitus Tipo 1/terapia , Terapêutica/tendências , Administração por Inalação , Adolescente , Automonitorização da Glicemia/instrumentação , Automonitorização da Glicemia/métodos , Humanos , Insulina/administração & dosagem , Insulina/análogos & derivados , Sistemas de Infusão de Insulina
18.
Diabetes Care ; 24(11): 1858-62, 2001 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-11679447

RESUMO

OBJECTIVE: Children with type 1 diabetes are usually asked to perform self-monitoring of blood glucose (SMBG) before meals and at bedtime, and it is assumed that if results are in target range, along with HbA(1c) measurements, then overall glycemic control is adequate. However, the brief glimpses in the 24-h glucose profile provided by SMBG may miss marked glycemic excursions. The MiniMed Continuous Glucose Monitoring System (CGMS) has provided a new method to obtain continuous glucose profiles and opportunities to examine limitations of conventional monitoring. RESEARCH DESIGN AND METHODS: A total of 56 children with type 1 diabetes (age 2-18 years) wore the CGMS for 3 days. Patients entered four fingerstick blood samples into the monitor for calibration and kept records of food intake, exercise, and hypoglycemic symptoms. Data were downloaded, and glycemic patterns were identified. RESULTS: Despite satisfactory HbA(1c) levels (7.7 +/- 1.4%) and premeal glucose levels near the target range, the CGMS revealed profound postprandial hyperglycemia. Almost 90% of the peak postprandial glucose levels after every meal were >180 mg/dl (above target), and almost 50% were >300 mg/dl. Additionally, the CGMS revealed frequent and prolonged asymptomatic hypoglycemia (glucose <60 mg/dl) in almost 70% of the children. CONCLUSIONS: Despite excellent HbA(1c) levels and target preprandial glucose levels, children often experience nocturnal hypoglycemia and postprandial hyperglycemia that are not evident with routine monitoring. Repeated use of the CGMS may provide a means to optimize basal and bolus insulin replacement in patients with type 1 diabetes.


Assuntos
Automonitorização da Glicemia/normas , Glicemia/metabolismo , Diabetes Mellitus Tipo 1/sangue , Período Pós-Prandial/fisiologia , Adolescente , Criança , Pré-Escolar , Ritmo Circadiano , Hemoglobinas Glicadas/análise , Humanos , Hiperglicemia/sangue , Monitorização Ambulatorial/métodos , Reprodutibilidade dos Testes
19.
J Adolesc Health ; 28(5): 377-85, 2001 May.
Artigo em Inglês | MEDLINE | ID: mdl-11336867

RESUMO

PURPOSE: To examine the following questions with regard to the initiation of a new intensive management program for adolescents with Type 1 diabetes mellitus: (a) What clinical and psychosocial factors are associated with achievement of metabolic control treatment goals after 1 year? and (b) What baseline clinical and psychosocial factors are associated with improvement in the quality of life after 12 months? METHODS: Eighty-one subjects (of 83 who began; aged 14.3 +/- 2.0 years at entry; 48 females, 33 males; 95% white; diabetes duration 8.9 +/- 3.9 years) with Type 1 diabetes completed 12 months of follow-up in a study of intensified treatment of diabetes. Assessments at baseline and at 12 months used the Diabetes Quality of Life for Youth scale, the Self-efficacy for Diabetes Scale, the Children's Depression Inventory, the Issues in Coping with Diabetes Scale, and the Diabetes Family Behavior Scale. Data were analyzed using multiple and logistic regression. RESULTS: From a baseline of >9%, HbA1c levels decreased to a mean of 7.8 +/- 0.7%, with 30% of the subjects achieving our treatment goal of

Assuntos
Adaptação Psicológica , Diabetes Mellitus Tipo 1/psicologia , Qualidade de Vida , Adolescente , Bases de Dados Factuais , Diabetes Mellitus Tipo 1/terapia , Feminino , Hemoglobinas Glicadas/metabolismo , Objetivos , Humanos , Modelos Logísticos , Masculino , Carência Psicossocial
20.
J Pediatr ; 137(1): 107-13, 2000 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-10891831

RESUMO

OBJECTIVE: To determine whether initial effects on metabolic control and quality of life associated with a behavioral intervention combined with intensive diabetes management (IDM) can be sustained over 1 year in youth implementing intensive therapy regimens. STUDY DESIGN: Seventy-seven patients (43 females, 95% white) 12 to 20 years (mean = 14.2 +/- 1.9; duration, 8.7 +/- 3.9) electing to initiate IDM were randomly assigned to one of two groups: with or without coping skills training (CST), which consists of 6 small group sessions and monthly follow-up to help youth cope with their lives in the context of diabetes management; skills included social problem solving, cognitive behavior modification, and conflict resolution. Data were collected before the intervention and at 3, 6, and 12 months after the intervention by using the Self-Efficacy for Diabetes Scale, Children's Depression Inventory, Issues in Coping with IDDM, and the Diabetes Quality of Life: Youth scales. Clinical data (glycosylated hemoglobin level, height, weight, adverse effects) were collected monthly. RESULTS: The CST and IDM groups were comparable at baseline. CST subjects had lower glycosylated hemoglobin (P =.001) and better diabetes (P =.002) and medical (P =. 04) self-efficacy, and less impact of diabetes on their quality of life (P =.005) than youth receiving IDM alone after 1 year. In males, CST did not affect adverse outcomes of IDM hypoglycemia, diabetic ketoacidosis, and weight gain, but CST decreased the incidence of weight gain (P =.05) and hypoglycemia in females (P =.03). CONCLUSIONS: The addition of behavioral intervention to IDM in adolescence results in improved metabolic control and quality of life over 1 year.


Assuntos
Adaptação Psicológica , Terapia Comportamental , Diabetes Mellitus Tipo 1/terapia , Qualidade de Vida , Adolescente , Adulto , Criança , Diabetes Mellitus Tipo 1/sangue , Feminino , Hemoglobinas Glicadas/análise , Humanos , Masculino
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA