Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 28
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
Scand J Med Sci Sports ; 28(1): 77-87, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28295686

RESUMO

We investigated the effects of sprint interval training (SIT) and moderate-intensity continuous training (MICT) on glucose uptake (GU) during hyperinsulinemic euglycemic clamp and fatty acid uptake (FAU) at fasting state in thigh and arm muscles in subjects with type 2 diabetes (T2D) or prediabetes. Twenty-six patients (age 49, SD 4; 10 women) were randomly assigned into two groups: SIT (n=13) and MICT (n=13). The exercise in the SIT group consisted of 4-6×30 s of all-out cycling with 4- minute recovery and in the MICT group 40- to 60- minute cycling at 60% of VO2peak . Both groups completed six training sessions within two weeks. GU and FAU were measured before and after the intervention with positron emission tomography in thigh (quadriceps femoris, QF; and hamstrings) and upper arm (biceps and triceps brachii) muscles. Whole-body insulin-stimulated GU increased significantly by 25% in both groups, and this was accompanied with significantly increased insulin-stimulated GU in all thigh and upper arm muscles and significantly increased FAU in QF. Within QF, insulin-stimulated GU improved more by SIT than MICT in rectus femoris (P = .01), but not differently between the training modes in the other QF muscles. In individuals with T2D or prediabetes, both SIT and MICT rapidly improve insulin-stimulated GU in whole body and in the thigh and arm muscles as well as FAU in the main working muscle QF. These findings highlight the underused potential of exercise in rapidly restoring the impaired skeletal muscle metabolism in subjects with impaired glucose metabolism.


Assuntos
Diabetes Mellitus Tipo 2/metabolismo , Exercício Físico , Glucose/metabolismo , Insulina/farmacologia , Músculo Esquelético/metabolismo , Estado Pré-Diabético/metabolismo , Braço , Composição Corporal , Metabolismo dos Carboidratos , Feminino , Técnica Clamp de Glucose , Humanos , Perna (Membro) , Masculino , Pessoa de Meia-Idade , Consumo de Oxigênio , Condicionamento Físico Humano/métodos
2.
Br J Cancer ; 110(12): 2905-13, 2014 Jun 10.
Artigo em Inglês | MEDLINE | ID: mdl-24853182

RESUMO

BACKGROUND: Cdc20 is an essential component of cell division and responsible for anaphase initiation regulated by securin degradation. Cdc20 function is strongly regulated by the spindle assembly checkpoint to ensure the timely separation of sister chromatids and integrity of the genome. We present the first results on Cdc20 in a large clinical breast cancer material. METHODS: The study was based on 445 breast cancer patients with up to 20 years of follow-up (mean 10.0 years). DNA content was determined by image cytometry on cell imprints, and Cdc20 and securin immunohistochemistry on tissue microarrays of breast cancer tissue. RESULTS: In our results, high Cdc20 and securin expression was associated with aneuploid DNA content. In prognostic analyses, high Cdc20 immunoexpression alone and in combination with high securin immunoexpression indicated aggressive course of disease and up to 6.8-fold (P<0.001) risk of breast cancer death. Particularly, high Cdc20 and securin immunoexpression identified a patient subgroup with extremely short, on average 2.4 years, breast cancer survival and triple-negative breast cancer (TNBC) subtype. CONCLUSIONS: We report for the first time the association of high Cdc20 and securin immunoexpression with extremely poor outcome of breast cancer patients. Our experience indicates that Cdc20 and securin are promising candidates for clinical applications in breast cancer prognostication, especially in the challenging prognostic decisions of TNBC.


Assuntos
Proteínas Cdc20/biossíntese , Proteínas de Neoplasias/biossíntese , Securina/biossíntese , Neoplasias de Mama Triplo Negativas/metabolismo , Neoplasias de Mama Triplo Negativas/mortalidade , Adulto , Idoso , Idoso de 80 Anos ou mais , DNA/análise , DNA/genética , Feminino , Humanos , Pessoa de Meia-Idade , Resultado do Tratamento
3.
J Endocrinol ; 261(3)2024 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-38593833

RESUMO

The mouse estrous cycle is divided into four stages: proestrus (P), estrus (E), metestrus (M), and diestrus (D). The estrous cycle affects reproductive hormone levels in a wide variety of tissues. Therefore, to obtain reliable results from female mice, it is important to know the estrous cycle stage during sampling. The stage can be analyzed from a vaginal smear under a microscope. However, it is time-consuming, and the results vary between evaluators. Here, we present an accurate and reproducible method for staging the mouse estrous cycle in digital whole-slide images (WSIs) of vaginal smears. We developed a model using a deep convolutional neural network (CNN) in a cloud-based platform, Aiforia Create. The CNN was trained by supervised pixel-level multiclass semantic segmentation of image features from 171 hematoxylin-stained samples. The model was validated by comparing the results obtained by CNN with those of four independent researchers. The validation data included three separate studies comprising altogether 148 slides. The total agreement attested by the Fleiss kappa value between the validators and the CNN was excellent (0.75), and when D, E, and P were analyzed separately, the kappa values were 0.89, 0.79, and 0.74, respectively. The M stage is short and not well defined by the researchers. Thus, identification of the M stage by the CNN was challenging due to the lack of proper ground truth, and the kappa value was 0.26. We conclude that our model is reliable and effective for classifying the estrous cycle stages in female mice.


Assuntos
Aprendizado Profundo , Ciclo Estral , Animais , Feminino , Ciclo Estral/fisiologia , Camundongos , Esfregaço Vaginal/métodos , Redes Neurais de Computação , Processamento de Imagem Assistida por Computador/métodos , Reprodutibilidade dos Testes
4.
Osteoporos Int ; 24(12): 2983-92, 2013 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-23652464

RESUMO

UNLABELLED: Guidelines suggest identification of women at fracture risk by bone density measurement and subsequently pharmacotherapy. However, most women who sustain a hip fracture do not have osteoporosis in terms of bone density. The present non-pharmacological intervention among elderly women unselected for osteoporosis reduced hip fracture risk by 55 % providing an alternative approach to fracture prevention. INTRODUCTION: Hip fractures are expensive for society and cause disability for those who sustain them. We studied whether a multifactorial non-pharmacological prevention program reduces hip fracture risk in elderly women. METHODS: A controlled trial concerning 60- to 70-year-old community-dwelling Finnish women was undertaken. A random sample was drawn from the Population Information System and assigned into the intervention group (IG) and control group (CG). Of the 2,547 women who were invited to the IG, 1,004 (39 %) and of the 2,120 invited to the CG, 1,174 (55 %) participated. The IG participated in a fracture prevention program for 1 week at a rehabilitation center followed by review days twice. The CG received no intervention. During the 10-year follow-up, both groups participated in survey questionnaire by mail. Outcome of interest was occurrence of hip fractures and changes in bone-health-related lifestyle. RESULTS: During the follow-up, 12 (1.2 %) women in the IG and 29 (2.5 %) in the CG sustained a hip fracture (P = 0.039). The determinants of hip fractures by stepwise logistic regression were baseline smoking (odds ratio (OR) 4.32 (95 % confidence interval [CI] 2.14-8.71), age OR 1.15/year (95 % CI 1.03-1.28), fall history OR 2.7 (95 % CI 1.24-5.9), stroke history OR 2.99 (95 % CI 1.19-7.54) and participating in this program OR 0.45 (95 % CI 0.22-0.93). Starting vitamin D and calcium supplement use was more common in the IG compared with the CG. CONCLUSIONS: The results suggest that this non-pharmacological fracture prevention program may reduce the risk of hip fractures in elderly Finnish women.


Assuntos
Educação em Saúde/métodos , Promoção da Saúde/métodos , Fraturas do Quadril/prevenção & controle , Fraturas por Osteoporose/prevenção & controle , Acidentes por Quedas/prevenção & controle , Acidentes por Quedas/estatística & dados numéricos , Idoso , Cálcio/uso terapêutico , Uso de Medicamentos/estatística & dados numéricos , Feminino , Finlândia/epidemiologia , Seguimentos , Fraturas do Quadril/epidemiologia , Humanos , Incidência , Estilo de Vida , Pessoa de Meia-Idade , Fraturas por Osteoporose/epidemiologia , Prevenção do Hábito de Fumar , Vitamina D/uso terapêutico
5.
Pediatr Rheumatol Online J ; 21(1): 35, 2023 Apr 14.
Artigo em Inglês | MEDLINE | ID: mdl-37060076

RESUMO

BACKGROUND: The ten-joint juvenile arthritis disease activity score (JADAS10) is designed to measure the level of disease activity in non-systemic juvenile idiopathic arthritis by providing a single numeric score. The clinical JADAS10 (cJADAS10) is a modification of the JADAS10 that excludes erythrocyte sedimentation rate (ESR). Three different sets of JADAS10/cJADAS10 cut-offs for disease activity states have been published, i.e., the Backström, Consolaro, and Trincianti cut-offs. The objective of this study was to investigate the performance of existing JADAS10 cut-offs in real-life settings using patient data from The Finnish Rheumatology Quality Register (FinRheuma). METHODS: Data were collected from the FinRheuma register. The proportion of patients with an active joint count (AJC) above zero when classified as being in clinically inactive disease (CID) or low disease activity (LDA) groups according to existing JADAS10/cJADAS10 cut-off levels were analyzed. RESULTS: A significantly larger proportion of the patients classified as being in CID had an AJC > 0 when using the JADAS10/cJADAS10 cut-offs by Trincianti et al. compared to those for the other cut-offs. In the LDA group, a significantly larger proportion of the polyarticular patients (35%/29%) had an AJC of two when Trincianti JADAS10/cJADAS10 cut-offs were used compared with when Backström (11%/10%) and Consolaro (7%/3%) JADAS10/cJADAS10 cut-offs were used. CONCLUSIONS: We found the cut-offs proposed by Consolaro et al. to be the most feasible, since these cut-off levels for CID do not result in the misclassification of active disease as remission, and the proportion of patients with AJC > 1 in the LDA group is lowest using these cut-offs.


Assuntos
Antirreumáticos , Artrite Juvenil , Reumatologia , Humanos , Artrite Juvenil/diagnóstico , Artrite Juvenil/tratamento farmacológico , Antirreumáticos/uso terapêutico , Finlândia , Estudos de Viabilidade
6.
Eur J Endocrinol ; 185(4): 515-524, 2021 Aug 27.
Artigo em Inglês | MEDLINE | ID: mdl-34324430

RESUMO

OBJECTIVE: In primary hyperparathyroidism (PHPT) with osteoporosis, bone mineral density (BMD) improves after parathyroidectomy. It is unclear whether combining surgery with postoperative bisphosphonate treatment can further improve bone health. DESIGN: This randomized, placebo-controlled study compared the effects of surgery alone and surgery combined with zoledronic acid on bone metabolism in PHPT with osteoporosis. METHODS: Fifty-six patients (f/m 47/9, mean age 68.4 years) with PHPT and osteoporosis were randomized 1-3 months after parathyroidectomy to receive a 2-year treatment of zoledronic acid or placebo. Dual-energy X-ray absorptiometry (DXA) and bone turnover markers (N-terminal propeptide of type 1 procollagen, C-terminal telopeptide of type 1 collagen, and alkaline phosphatase) were measured annually during the 2-year follow-up. RESULTS: Two years after parathyroidectomy, BMD was significantly higher in the zoledronic acid (ZOL) group compared with the placebo (PBO) group at the femoral neck (P = 0.045 for Z-score) and lumbar spine (P = 0.039 and 0.017 for T- and Z-scores, respectively). Bone turnover markers were significantly lower in the ZOL group (P < 0.001 for all markers). Of the 18 patients who had received bisphosphonates for >1 year before surgery, BMD improved significantly in the ZOL group both in the femoral neck and lumbar spine (n = 10; all P < 0.001-0.01), but in the PBO group, only in the lumbar spine (n = 8, P = 0.03), (P = 0.08-0.95 for between-group changes). CONCLUSION: BMD increases after parathyroidectomy both with and without zoledronic acid but the increase is significantly higher with postoperative zoledronic acid.


Assuntos
Hiperparatireoidismo Primário , Osteoporose , Ácido Zoledrônico/administração & dosagem , Idoso , Densidade Óssea/efeitos dos fármacos , Conservadores da Densidade Óssea/administração & dosagem , Terapia Combinada , Método Duplo-Cego , Esquema de Medicação , Feminino , Finlândia , Humanos , Hiperparatireoidismo Primário/complicações , Hiperparatireoidismo Primário/tratamento farmacológico , Hiperparatireoidismo Primário/cirurgia , Masculino , Pessoa de Meia-Idade , Osteoporose/tratamento farmacológico , Osteoporose/etiologia , Osteoporose/cirurgia , Paratireoidectomia , Período Pós-Operatório , Resultado do Tratamento
7.
Obes Sci Pract ; 5(3): 258-272, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31275600

RESUMO

INTRODUCTION: New strategies for weight loss and weight maintenance in humans are needed. Human brown adipose tissue (BAT) can stimulate energy expenditure and may be a potential therapeutic target for obesity and type 2 diabetes. However, whether exercise training is an efficient stimulus to activate and recruit BAT remains to be explored. This study aimed to evaluate whether regular exercise training affects cold-stimulated BAT metabolism and, if so, whether this was associated with changes in plasma metabolites. METHODS: Healthy sedentary men (n = 11; aged 31 [SD 7] years; body mass index 23 [0.9] kg m-2; VO2 max 39 [7.6] mL min-1 kg-1) participated in a 6-week exercise training intervention. Fasting BAT and neck muscle glucose uptake (GU) were measured using quantitative [18F]fluorodeoxyglucose positron emission tomography-magnetic resonance imaging three times: (1) before training at room temperature and (2) before and (3) after the training period during cold stimulation. Cervico-thoracic BAT mass was measured using MRI signal fat fraction maps. Plasma metabolites were analysed using nuclear magnetic resonance spectroscopy. RESULTS: Cold exposure increased supraclavicular BAT GU by threefold (p < 0.001), energy expenditure by 59% (p < 0.001) and plasma fatty acids (p < 0.01). Exercise training had no effect on cold-induced GU in BAT or neck muscles. Training increased aerobic capacity (p = 0.01) and decreased visceral fat (p = 0.02) and cervico-thoracic BAT mass (p = 0.003). Additionally, training decreased very low-density lipoprotein particle size (p = 0.04), triglycerides within chylomicrons (p = 0.04) and small high-density lipoprotein (p = 0.04). CONCLUSIONS: Although exercise training plays an important role for metabolic health, its beneficial effects on whole body metabolism through physiological adaptations seem to be independent of BAT activation in young, sedentary men.

8.
EJNMMI Res ; 9(1): 38, 2019 May 09.
Artigo em Inglês | MEDLINE | ID: mdl-31073768

RESUMO

BACKGROUND: Positron emission tomography (PET) can be used for in vivo evaluation of the pathology associated with multiple sclerosis. We investigated the use of longitudinal PET imaging and the 18-kDa translocator protein (TSPO) binding radioligand [18F]GE-180 to detect changes in a chronic multiple sclerosis-like focal delayed-type hypersensitivity experimental autoimmune encephalomyelitis (fDTH-EAE) rat model during and after anti-VLA-4 monoclonal antibody (mAb) treatment. Thirty days after lesion activation, fDTH-EAE rats were treated with the anti-VLA-4 mAb (n = 4) or a control mAb (n = 4; 5 mg/kg, every third day, subcutaneously) for 31 days. Animals were imaged with [18F]GE-180 on days 30, 44, 65, 86 and 142. Another group of animals (n = 4) was used for visualisation the microglia with Iba-1 at day 44 after a 2-week treatment period. RESULTS: After a 2-week treatment period on day 44, there was a declining trend (p = 0.067) in [18F]GE-180-binding in the anti-VLA-4 mAb-treated animals versus controls. However, cessation of treatment for 4 days after a 31-day treatment period increased [18F]GE-180 binding in animals treated with anti-VLA-4 mAb compared to the control group (p = 0.0003). There was no difference between the groups in TSPO binding by day 142. CONCLUSIONS: These results demonstrated that cessation of anti-VLA-4 mAb treatment for 4 days caused a transient rebound increase in neuroinflammation. This highlights the usefulness of serial TSPO imaging in the fDTH-EAE model to better understand the rebound phenomenon.

9.
Eur J Clin Nutr ; 61(4): 493-7, 2007 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-17136043

RESUMO

OBJECTIVE: To study if vitamin D fortification of milk products started in February 2003 has improved vitamin D status of young Finnish men, which has been poor before. DESIGN: A longitudinal study of one cohort. SETTING: Helsinki University Central Hospital. SUBJECTS: Sixty-five healthy men, studied for the first time in January 2001, were re-examined in January 2004. They were aged 18-21 years in 2001. METHODS: Blood was sampled for determination of serum 25-hydroxyvitamin D (25-OHD) and intact parathyroid hormone (iPTH). 25-OHD was measured by both radioimmunoassay (RIA) and high-pressure liquid chromatography (HPLC). Consumption of milk, sour milk and fish and use of vitamin D supplements were assessed using a questionnaire. RESULTS: In January 2004, vitamin D fortification had raised serum 25-OHD level, with the mean of individual percent changes being 20.4% measured with RIA (P=0.0015). The correlation between the RIA and HPLC methods was high (r=0.85). Nineteen men (29.2%) had vitamin D deficiency (25-OHD

Assuntos
Conservadores da Densidade Óssea/administração & dosagem , Alimentos Fortificados , Hormônio Paratireóideo/sangue , Deficiência de Vitamina D/dietoterapia , Vitamina D/análogos & derivados , Vitamina D/administração & dosagem , Adolescente , Adulto , Animais , Cálcio da Dieta/administração & dosagem , Bovinos , Cromatografia Líquida de Alta Pressão , Estudos de Coortes , Finlândia , Humanos , Estudos Longitudinais , Masculino , Leite , Radioimunoensaio , Inquéritos e Questionários , Vitamina D/sangue , Deficiência de Vitamina D/sangue , Deficiência de Vitamina D/epidemiologia
10.
J Psychiatr Ment Health Nurs ; 23(6-7): 427-37, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-27500395

RESUMO

WHAT IS KNOWN ON THE SUBJECT?: Stigma related to mental illnesses is a great burden on societies globally. Factors associated with nurses' attitudes towards people with mental illness in health-care settings are discrepant. Stigmatized attitudes among staff members towards patients with mental illness have widely been studied in various specialized health care contexts, but less often in primary health-care settings. WHAT THIS PAPER ADDS TO THE EXISTING KNOWLEDGE?: Nurses' attitudes towards people with mental illness in general were positive in primary care health settings. Younger nurses expressed feeling afraid of mentally ill patients. They not only lacked a feeling of safety around these patients but were also often of the opinion that people with mental illness should be segregated from the general population. WHAT ARE THE IMPLICATIONS FOR PRACTICE?: Systematic and continuous mental health on-the-job training for primary care nurses is recommended to strengthen the positive attitudes of young nurses towards patients. Young nurses especially should be prevented from developing stigmatized attitudes towards patients with mental problems and to ensure a skilled workforce for the future in this demanding area of health care. ABSTRACT: Introduction Despite the development of mental health services in many countries, nurses working in different health care specialties may still have concerns and negative attitudes towards people with mental illness. Aim To describe nurses' attitudes towards people with mental illness and examine factors associated with their attitudes in primary care health centres. Method The data were collected from nursing staff (N = 264, response rate 84%) in 15 primary care health centres in two Finnish cities (spring 2014) with a self-report questionnaire (Attribution Questionnaire-27, Corrigan 2003) and analysed by descriptive statistics and multiway covariance analysis. Results Nurses' attitudes towards people with mental illness were generally positive. The nurses mostly reported willingness to help and feelings of concern and sympathy towards these patients. However, younger nurses or those without additional mental health training expressed a fear of patients. Discussion Special attention should be paid to nursing education and on-the-job training to prevent young nurses from developing stigmatized attitudes towards patients. Implications for practice Higher confidence in nursing staff could ensure a skilled work force in areas of mental health in the future, prevent young nurses from developing a fear of patients at work and support positive attitudes towards patients with mental problems.


Assuntos
Atitude do Pessoal de Saúde , Pessoas Mentalmente Doentes , Recursos Humanos de Enfermagem/estatística & dados numéricos , Atenção Primária à Saúde/estatística & dados numéricos , Estereotipagem , Adulto , Feminino , Finlândia , Humanos , Masculino , Pessoa de Meia-Idade , Recursos Humanos de Enfermagem/psicologia
11.
Cell Oncol (Dordr) ; 39(4): 319-31, 2016 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-26984614

RESUMO

PURPOSE: Securin belongs to a class of cell cycle regulators that prevent metaphase-to-anaphase transition until sister chromatid separation is complete. Evidence is accumulating that securin has a prognostic impact on a variety of malignancies but, thus far, the role and regulation of securin expression and its sub-cellular localization have not been systematically addressed in breast cancer. METHODS: In total 470 breast cancer specimens with follow-up data for up to 22 years were included. Immunohistochemical staining and immunofluorescence double-staining were performed for securin and its regulating proteins PTTG1IP, CDC20 and BUBR1. Prognostic associations were evaluated between the expression patterns of these proteins and established prognosticators of invasive breast cancer and patient survival. RESULTS: We found that a high fraction of securin expressing cancer cells predicted an unfavorable clinical outcome of the breast cancer patients (p < 0.001). Also in multivariate analyses, the fraction of securin expressing cancer cells served as an independent prognosticator of a poor survival (p < 0.0001). We also found that the sub-cellular localization of securin exhibited prognostic power, since cytoplasmic securin expression in the cancer cells appeared to be associated with aggressive breast cancer subtypes and high breast cancer-associated mortality rates (p = 0.003). Through immunofluorescence double-staining, we found that PTTG1IP, CDC20 and BUBR1 exhibited distinct patterns of co-expression with securin, suggesting a regulatory role in the metaphase-to-anaphase transition in human breast cancer cells. We also noted that a subgroup of triple-negative breast carcinomas exhibited deviant expression patterns for the proteins studied. CONCLUSIONS: Our data indicate that securin expression may serve as a strong and independent prognosticator of breast cancer outcome and that a cytoplasmic localization of the protein may provide additional prognostic information, particularly in the biologically and clinically challenging subgroup of triple-negative breast carcinomas. The sub-cellular localization of securin appears to reflect the expression of PTTG1IP, CDC20 and BUBR1, which may participate in the regulation of securin activity and, ultimately, in the survival of breast cancer patients.


Assuntos
Biomarcadores Tumorais/análise , Neoplasias da Mama/patologia , Securina/biossíntese , Adulto , Idoso , Neoplasias da Mama/metabolismo , Neoplasias da Mama/mortalidade , Feminino , Imunofluorescência , Humanos , Imuno-Histoquímica , Estimativa de Kaplan-Meier , Pessoa de Meia-Idade , Prognóstico , Modelos de Riscos Proporcionais , Securina/análise , Análise Serial de Tecidos
12.
Eur J Clin Nutr ; 59(10): 1105-11, 2005 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-16015262

RESUMO

OBJECTIVE: To study the relationships of molecularly defined lactose malabsorption (LM) and self-reported lactose intolerance (LI) to bone mineral density (BMD) and fractures among Finnish postmenopausal women. DESIGN: A cross-sectional study of two cohorts. SETTING: Helsinki University Central Hospital. SUBJECTS: One cohort was population-based and comprised 453 women, aged 62-78 (mean 69) y. Another comprised 52 women, aged 69-85 (mean 75) y, with osteoporotic fractures and 59 control women, aged 69-83 (mean 74) y, without osteoporosis. METHODS: A single nucleotide polymorphism of the lactase (LCT) gene at chromosome 2q21-22 was studied. It shows complete association with intestinal disaccharidase activity, with the genotype CC(-13 910) meaning adult-type hypolactasia (primary LM) and the genotypes CT(-13 910) and TT(-13 910) lactose absorption. BMD of the heel was measured by dual-energy X-ray absorptiometry (DXA). RESULTS: In the population-based cohort, 16.0% of women had self-reported LI but only 15.3% of them had the CC(-13 910) genotype. Calcium intake from dairy products (P = 0.10) and BMD, adjusted for age, weight, height, exercise, smoking, and estrogen use (P = 0.71) were similar for the genotypes. Women with self-reported LI had reduced calcium intake from dairy products (P < 0.0001) but they were more frequent users of calcium supplements than lactose-tolerants (P < 0.0001). Adjusted BMD was similar for lactose intolerant and tolerant women (P = 0.60). Of 104 women with previous fracture in the population-based cohort, 13.5% had the CC(-13 910) genotype, which did not differ from the prevalence of 19.3% among 347 women without fractures (P = 0.29). The frequency of the CC(-13 910) genotype (23.1%) for 52 women with established osteoporosis was similar as for 59 control women (15.3%) (P = 0.19). CONCLUSION: Molecularly defined LM and self-reported LI are not risk factors for osteoporosis, if calcium intake from diet and/or supplements remains sufficient. Our study confirms the poor correlation between self-reported LI and LM established by different techniques.


Assuntos
Lactase , Intolerância à Lactose/genética , Lactose/metabolismo , Osteoporose Pós-Menopausa/epidemiologia , Polimorfismo de Nucleotídeo Único , Idoso , Idoso de 80 Anos ou mais , Cálcio da Dieta/administração & dosagem , Cálcio da Dieta/metabolismo , Estudos de Casos e Controles , Estudos de Coortes , Estudos Transversais , Laticínios , Feminino , Finlândia/epidemiologia , Fraturas Ósseas/epidemiologia , Fraturas Ósseas/etiologia , Predisposição Genética para Doença , Genótipo , Humanos , Lactase/deficiência , Lactase/genética , Intolerância à Lactose/complicações , Intolerância à Lactose/epidemiologia , Pessoa de Meia-Idade , Osteoporose Pós-Menopausa/etiologia , Fatores de Risco
13.
J Bone Miner Res ; 12(1): 66-71, 1997 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-9240727

RESUMO

Gastrointestinal absorption of bisphosphonates is highly variable from individual to individual (between-subject variation) and from day to day (within-subject variation), a fact that creates problems both in research and in clinical use of these drugs. We conducted a randomized, two-period cross-over pharmacokinetic (phase I) study to assess the relative bioavailability of two different clodronate preparations: an 800 mg tablet and a 400 mg capsule. Urinary excretion of clodronate correlates with gastrointestinal absorption. To minimize the confounding effect of the high variability of gastrointestinal absorption, we chose as the primary parameter the cumulative amount of clodronate excreted into urine (A(e0-t)) during 9 days (7 days of treatment, 2 days of follow-up). The 90% confidence interval calculated for the population medians of A(e0-t) was 0.83-1.09, well within the 90% confidence interval stipulated for bioequivalence for the area under the curve values (0.80-1.25). This new procedure for pooling urinary excretion data offered a clear advantage over previous methods, and thus could presumably be used to study other drugs as well that are not metabolized and may show highly variable gastrointestinal absorption.


Assuntos
Analgésicos não Narcóticos/farmacocinética , Ácido Clodrônico/farmacocinética , Administração Oral , Adolescente , Adulto , Analgésicos não Narcóticos/administração & dosagem , Analgésicos não Narcóticos/farmacologia , Analgésicos não Narcóticos/urina , Análise de Variância , Área Sob a Curva , Disponibilidade Biológica , Cápsulas/metabolismo , Cápsulas/normas , Ácido Clodrônico/administração & dosagem , Ácido Clodrônico/farmacologia , Ácido Clodrônico/urina , Estudos Cross-Over , Feminino , Seguimentos , Meia-Vida , Humanos , Absorção Intestinal/efeitos dos fármacos , Absorção Intestinal/fisiologia , Masculino , Padrões de Referência , Reprodutibilidade dos Testes , Software , Comprimidos/metabolismo , Comprimidos/normas , Equivalência Terapêutica
14.
Bone ; 27(2): 293-6, 2000 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-10913925

RESUMO

Because of the low and variable bioavailability of bisphosphonates and the huge effect of food on their gastrointestinal absorption, it is of utmost importance to know the optimal timing of drug intake in relation to food intake. We investigated the effect of time on the bioavailability of clodronate when the drug was administered 2, 1, or 0.5 h before breakfast, with breakfast, or 2 h after breakfast (in the middle of a 4-h fast). The study was conducted as a single-center, open, balanced, randomized, crossover pharmacokinetic study in 31 healthy subjects aged 21 to 34 years. The volunteers participated in five different sessions with 800 mg of oral clodronate, and these sessions were separated by washout phases, each for at least 1 week. The primary pharmacokinetic variables were the area under the serum concentration time curve in 24 h (AUC(0-24)) for clodronate and the maximal concentration of clodronate in serum (C(max)). Clodronate was absorbed rather similarly when taken in the morning on an empty stomach 2, 1, or 0.5 h before breakfast, but because the best absorption occurred (as expected) when the drug was taken 2 h before breakfast, this scheme served as the reference treatment. As evaluated by area under the serum concentration time curves, the dose-breakfast interval of 1 h scarcely reduced absorption from the reference treatment level (relative absorption 91%, p = 1.0). Compared with the reference treatment, clodronate was absorbed with 69% efficacy (p = 0.65) when breakfast followed only 0.5 h later. The dose-breakfast intervals of 0.5 and 1 h did not differ significantly from each other (p = 0.85). Absorption was, however, only 34% (p < 0.0001) of the optimum when the drug was taken 2 h after breakfast, and only 10% of optimal when clodronate was taken with breakfast (p < 0.0001). In conclusion, it can be recommended to take Bonefos capsules in the morning on an empty stomach at least 0.5 h before breakfast.


Assuntos
Analgésicos não Narcóticos/administração & dosagem , Analgésicos não Narcóticos/farmacocinética , Ácido Clodrônico/administração & dosagem , Ácido Clodrônico/farmacocinética , Ingestão de Alimentos , Adulto , Estudos Cross-Over , Esquema de Medicação , Interações Alimento-Droga , Humanos , Absorção Intestinal
15.
Bone ; 28(3): 310-5, 2001 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-11248662

RESUMO

The aim of this study was to determine whether clodronate reduced the incidence of vertebral fractures in patients with osteoporosis. We report here the interim analysis after 1 year of a 3-year double-blind placebo-controlled study. The objectives of the interim analysis were to determine whether there was a trend in fracture frequency and to examine the effects of clodronate on bone mineral density (BMD). Patients with densitometrically proven osteoporosis (T-score <-2.5 and <-3 for women and men, respectively) or with at least one prevalent vertebral fracture were recruited to a 3-year double-blind, controlled study. Patients were randomized to three strata, namely women with postmenopausal osteoporosis (stratum I, n = 483), women with secondary osteoporosis (II, n = 110), and men with osteoporosis of any causation (III, n = 84). They received either clodronate 800 mg daily by mouth or an identical placebo, and all patients received a calcium supplement of 500 mg daily. BMD was measured at six monthly intervals, and lateral spine radiographs for vertebral morphometry were obtained at baseline and 1 year. Treatment with clodronate was associated with a significant increase in BMD at the spine of 3.2 +/- 0.3% (p < 0.0001 vs. baseline) compared with a nonsignificant change of 0.5 +/- 0.3% in the placebo group (p < 0.0001 between treatments). At the hip, clodronate was associated with a significant increase in total hip BMD of 1.3 +/- 0.3% (p = 0.018 vs. baseline) compared with a small decrease of 0.4 +/- 0.3% in the placebo group (p = 0.027 for the difference between treatment groups). The mean changes at the spine and hip were similar in all three strata. Incident vertebral fractures were observed in 27 patients at 1 year in the placebo group (9.0%) and in 14 patients receiving clodronate (4.9%) (relative risk 0.54; 95% CI 0.29-1.02; p = 0.07). A trend was observed in all treatment strata. Treatment was well tolerated, with no significant adverse events attributable to clodronate treatment. We conclude that clodronate 800 mg daily is effective in preventing bone loss, and at 1 year, there is a trend consistent with antifracture efficacy in patients with established osteoporosis regardless of causation.


Assuntos
Ácido Clodrônico/uso terapêutico , Osteoporose/complicações , Fraturas da Coluna Vertebral/prevenção & controle , Densidade Óssea , Feminino , Humanos , Incidência , Masculino , Medição de Risco , Fraturas da Coluna Vertebral/epidemiologia , Fraturas da Coluna Vertebral/etiologia , Reino Unido/epidemiologia
16.
Bone Marrow Transplant ; 23(4): 355-61, 1999 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-10100579

RESUMO

Transplantation of solid organs including heart, kidney, and liver is associated with rapid bone loss and increased rate of fracture; data on bone marrow transplantation recipients (BMT) are scarce. The purpose of the present study was to examine the magnitude, timing, and mechanism of bone loss following allogeneic BMT, and to study whether bone loss can be prevented by calcium with or without calcitonin. Sixty-nine patients undergoing allogeneic BMT for malignant blood diseases were enrolled into the study. Forty-four (22 women, 22 men) completed 6 months, and 36 patients 1 year follow-up. They were randomized to receive either no additional treatment (n = 22), or oral calcium 1 g twice daily for 12 months (n = 12) or the same dose of calcium plus intranasal calcitonin 400 IU/day for the first month and then 200 IU/day for 11 months (n = 10). Bone mineral density (BMD) at the lumbar spine and three femoral sites (femoral neck, trochanter, Ward's triangle) was measured by dual-energy X-ray absorptiometry (DXA). Bone turnover rate was followed with markers of bone formation and resorption (serum bone-specific alkaline phosphatase (B-ALP), type I procollagen carboxyterminal (PICP) and aminoterminal propeptide (PINP), serum type I collagen carboxyterminal telopeptide (ICTP)). Serum testosterone was assayed in men. Calcium with or without calcitonin had no effect on bone loss or bone markers; consequently the three study groups were combined. During the first 6 post-transplant months BMD decreased by 5.7% in the lumbar spine and by 6.9% to 8.7% in the three femoral sites (P < 0.0001 for all); no significant further decline occured between 6 and 12 months. Four out of 25 assessable patients experienced vertebral compression fractures. Markers of bone formation reduced: B-ALP by 20% at 3 weeks (P = 0.027), PICP by 40% (P < 0.0001) and PINP by 63% at 6 weeks (P < 0.0001), with a return to baseline by 6 months. The marker of bone resorption, serum ICTP was above normal throughout the whole observation period, with a peak at 6 weeks (77% above baseline, P < 0.0001). In male patients serum testosterone decreased reaching a nadir (57% below baseline) at 6 weeks (P = 0.0003). In conclusion, significant bone loss occurs after BMT. It results from imbalance between reduced bone formation and increased bone resorption; hypogonadism may be a contributing factor in men. Bone loss can not be prevented by calcium with or without calcitonin.


Assuntos
Transplante de Medula Óssea/efeitos adversos , Remodelação Óssea , Reabsorção Óssea/tratamento farmacológico , Reabsorção Óssea/etiologia , Calcitonina/administração & dosagem , Cálcio/administração & dosagem , Neoplasias Hematológicas/terapia , Administração por Inalação , Administração Oral , Adulto , Reabsorção Óssea/fisiopatologia , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Prospectivos , Transplante Homólogo
17.
Eur J Pain ; 18(9): 1316-22, 2014 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-24687865

RESUMO

BACKGROUND: There are no nationwide trend surveys of the prevalence of musculoskeletal symptoms among university students. The aim of the study was to examine whether the prevalence of perceived musculoskeletal pain symptoms among Finnish university students has changed from 2000 to 2012, and to explore the co-occurrence of these symptoms. METHODS: Four cross-sectional nationwide representative samples (n = 11,502) were compared in 2000 (n = 3174), 2004 (n = 3153), 2008 (n = 2750) and 2012 (n = 2425). The prevalence of weekly neck-shoulder, lower back, limb or joint, and temporomandibular joint pain was studied. RESULTS: All the studied pains increased significantly from 2000 to 2012. The prevalence rate of neck-shoulder pain increased from 25% to 29%, lower back pain from 10% to 14%, and limb and joint pain increased from 7% to 8%. The prevalence of pain in temporomandibular joint increased from 4% to 5%. In addition, the co-occurrence of different musculoskeletal pain symptoms increased. All of these pain symptoms were more common among female students and among older students. CONCLUSION: An increasing trend in the prevalence of frequent musculoskeletal pain was found over the period of 12-years among Finnish university students.


Assuntos
Dor Musculoesquelética/epidemiologia , Estudantes/estatística & dados numéricos , Universidades/estatística & dados numéricos , Adulto , Comorbidade , Estudos Transversais , Feminino , Finlândia/epidemiologia , Humanos , Masculino , Prevalência , Fatores de Tempo , Adulto Jovem
18.
Eur Psychiatry ; 29(6): 371-80, 2014 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24315804

RESUMO

PURPOSE: In patients with schizophrenia, premorbid psychosocial adjustment is an important predictor of functional outcome. We studied functional outcome in young clinical high-risk (CHR) patients and how this was predicted by their childhood to adolescence premorbid adjustment. METHODS: In all, 245 young help-seeking CHR patients were assessed with the Premorbid Adjustment Scale, the Structured Interview for Prodromal Syndromes (SIPS) and the Schizophrenia Proneness Instrument (SPI-A). The SIPS assesses positive, negative, disorganised, general symptoms, and the Global Assessment of Functioning (GAF), the SPI-A self-experienced basic symptoms; they were carried out at baseline, at 9-month and 18-month follow-up. Transitions to psychosis were identified. In the hierarchical linear model, associations between premorbid adjustment, background data, symptoms, transitions to psychosis and GAF scores were analysed. RESULTS: During the 18-month follow-up, GAF scores improved significantly, and the proportion of patients with poor functioning decreased from 74% to 37%. Poor premorbid adjustment, single marital status, poor work status, and symptoms were associated with low baseline GAF scores. Low GAF scores were predicted by poor premorbid adjustment, negative, positive and basic symptoms, and poor baseline work status. The association between premorbid adjustment and follow-up GAF scores remained significant, even when baseline GAF and transition to psychosis were included in the model. CONCLUSION: A great majority of help-seeking CHR patients suffer from deficits in their functioning. In CHR patients, premorbid psychosocial adjustment, baseline positive, negative, basic symptoms and poor working/schooling situation predict poor short-term functional outcome. These aspects should be taken into account when acute intervention and long-term rehabilitation for improving outcome in CHR patients are carried out.


Assuntos
Sintomas Prodrômicos , Transtornos Psicóticos/psicologia , Psicologia do Esquizofrênico , Ajustamento Social , Adaptação Psicológica , Adolescente , Adulto , Feminino , Humanos , Masculino , Prognóstico , Transtornos Psicóticos/diagnóstico , Risco , Esquizofrenia/diagnóstico , Adulto Jovem
20.
Osteoporos Int ; 17(12): 1763-71, 2006 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-16944074

RESUMO

INTRODUCTION: Determinants of BUA and SOS and their changes during military service-associated physical training were studied in 196 army recruits and 50 control men, aged 18-20 years. METHODS: Heel ultrasound measurement, DXA, muscle strength test, Cooper's running test and genetic analyses were performed. Lifestyle factors were recorded. Sex steroids and bone turnover markers were determined. Heel ultrasound was repeated after six months. RESULTS: Exercise was the most significant determinant of both BUA (p<0.0001) and SOS (p<0.0001). There were 10% and 1.3% differences in BUA (p=0.006) and SOS (p=0.0001), respectively, between men belonging to the lowest and highest quartiles of exercise index. Weight associated with BUA (p=0.005) and height with SOS (p=0.03). BUA and SOS correlated with BMC and BMD (p<0.0001) but explained only up to 21% of their variance. Over six months SOS increased more in recruits than in control men (p=0.0043), the increase being higher, the lower muscle strength at baseline (r =-0.27, p=0.0028). CONCLUSION: Exercise is the most important determinant of ultrasonographic variables in men, aged 18-20 years. Physical loading during military training increases SOS.


Assuntos
Densidade Óssea/fisiologia , Calcanhar/diagnóstico por imagem , Militares , Adolescente , Adulto , Biomarcadores/sangue , Estatura/fisiologia , Peso Corporal/fisiologia , Reabsorção Óssea/fisiopatologia , Estudos de Coortes , Exercício Físico/fisiologia , Fêmur/fisiologia , Finlândia/epidemiologia , Calcanhar/fisiologia , Quadril , Humanos , Estilo de Vida , Vértebras Lombares/fisiologia , Masculino , Força Muscular/fisiologia , Osteogênese/fisiologia , Educação Física e Treinamento , Polimorfismo Genético , Ultrassonografia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA