| 1. |
- Fanidi, Anouar, et al.
(författare)
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Circulating Folate, Vitamin B6, and Methionine in Relation to Lung Cancer Risk in the Lung Cancer Cohort Consortium (LC3)
- 2018
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Ingår i: Journal of the National Cancer Institute. - : Oxford University Press. - 0027-8874 .- 1460-2105. ; 110:1
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Tidskriftsartikel (refereegranskat)abstract
- Background: Circulating concentrations of B vitamins and factors related to one-carbon metabolism have been found to be strongly inversely associated with lung cancer risk in the European Prospective Investigation into Cancer and Nutrition (EPIC) study. The extent to which these associations are present in other study populations is unknown.Methods: Within 20 prospective cohorts from the National Cancer Institute Cohort Consortium, a nested case-control study was designed including 5364 incident lung cancer case patients and 5364 control subjects who were individually matched to case patients by age, sex, cohort, and smoking status. Centralized biochemical analyses were performed to measure circulating concentrations of vitamin B6, folate, and methionine, as well as cotinine as an indicator of recent tobacco exposure. The association between these biomarkers and lung cancer risk was evaluated using conditional logistic regression models.Results: Participants with higher circulating concentrations of vitamin B6 and folate had a modestly decreased risk of lung cancer risk overall, the odds ratios when comparing the top and bottom fourths (OR 4vs1 ) being 0.88 (95% confidence interval [CI] = 0.78 to 1.00) and 0.86 (95% CI = 0.74 to 0.99), respectively. We found stronger associations among men (vitamin B6: OR 4vs1 = 0.74, 95% CI = 0.62 to 0.89; folate: OR 4vs1 = 0.75, 95% CI = 0.61 to 0.93) and ever smokers (vitamin B6: OR 4vs1 = 0.78, 95% CI = 0.67 to 0.91; folate: OR 4vs1 = 0.87, 95% CI = 0.73 to 1.03). We further noted that the association of folate was restricted to Europe/Australia and Asia, whereas no clear association was observed for the United States. Circulating concentrations of methionine were not associated with lung cancer risk overall or in important subgroups.Conclusions: Although confounding by tobacco exposure or reverse causation cannot be ruled out, these study results are compatible with a small decrease in lung cancer risk in ever smokers who avoid low concentrations of circulating folate and vitamin B6.
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| 2. |
- Huang, Joyce Y., et al.
(författare)
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Circulating markers of cellular immune activation in prediagnostic blood sample and lung cancer risk in the Lung Cancer Cohort Consortium (LC3)
- 2020
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Ingår i: International Journal of Cancer. - : John Wiley & Sons. - 0020-7136 .- 1097-0215. ; 146:9, s. 2394-2405
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Tidskriftsartikel (refereegranskat)abstract
- Cell-mediated immune suppression may play an important role in lung carcinogenesis. We investigated the associations for circulating levels of tryptophan, kynurenine, kynurenine:tryptophan ratio (KTR), quinolinic acid (QA) and neopterin as markers of immune regulation and inflammation with lung cancer risk in 5,364 smoking-matched case-control pairs from 20 prospective cohorts included in the international Lung Cancer Cohort Consortium. All biomarkers were quantified by mass spectrometry-based methods in serum/plasma samples collected on average 6 years before lung cancer diagnosis. Odds ratios (ORs) and 95% confidence intervals (CIs) for lung cancer associated with individual biomarkers were calculated using conditional logistic regression with adjustment for circulating cotinine. Compared to the lowest quintile, the highest quintiles of kynurenine, KTR, QA and neopterin were associated with a 20-30% higher risk, and tryptophan with a 15% lower risk of lung cancer (all p(trend) < 0.05). The strongest associations were seen for current smokers, where the adjusted ORs (95% CIs) of lung cancer for the highest quintile of KTR, QA and neopterin were 1.42 (1.15-1.75), 1.42 (1.14-1.76) and 1.45 (1.13-1.86), respectively. A stronger association was also seen for KTR and QA with risk of lung squamous cell carcinoma followed by adenocarcinoma, and for lung cancer diagnosed within the first 2 years after blood draw. This study demonstrated that components of the tryptophan-kynurenine pathway with immunomodulatory effects are associated with risk of lung cancer overall, especially for current smokers. Further research is needed to evaluate the role of these biomarkers in lung carcinogenesis and progression.
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| 3. |
- Midttun, Oivind, et al.
(författare)
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Circulating concentrations of biomarkers and metabolites related to vitamin status, one-carbon and the kynurenine pathways in US, Nordic, Asian, and Australian populations
- 2017
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Ingår i: American Journal of Clinical Nutrition. - : AMER SOC NUTRITION-ASN. - 0002-9165 .- 1938-3207. ; 105:6, s. 1314-1326
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Tidskriftsartikel (refereegranskat)abstract
- Background: Circulating concentrations of biomarkers that are related to vitamin status vary by factors such as diet, fortification, and supplement use. Published biomarker concentrations have also been influenced by the variation across laboratories, which complicates a comparison of results from different studies. Objective: We robustly and comprehensively assessed differences in biomarkers that are related to vitamin status across geographic regions. Design: The trial was a cross-sectional study in which we investigated 38 biomarkers that are related to vitamin status and one-carbon and tryptophan metabolism in serum and plasma from 5314 healthy control subjects representing 20 cohorts recruited from the United States, Nordic countries, Asia, and Australia, participating in the Lung Cancer Cohort Consortium. All samples were analyzed in a centralized laboratory. Results: Circulating concentrations of riboflavin, pyridoxal 5'-phosphate, folate, vitamin B-12, all-trans retinol, 25-hydroxyvitamin D, and a-tocopherol as well as combined vitamin scores that were based on these nutrients showed that the general B-vitamin concentration was highest in the United States and that the B vitamins and lipid soluble vitamins were low in Asians. Conversely, circulating concentrations of metabolites that are inversely related to B vitamins involved in the one-carbon and kynurenine pathways were high in Asians. The high B-vitamin concentration in the United States appears to be driven mainly by multivitamin-supplement users. Conclusions: The observed differences likely reflect the variation in intake of vitamins and, in particular, the widespread multivitamin-supplement use in the United States. The results provide valuable information about the differences in biomarker concentrations in populations across continents.
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| 4. |
- Simonson, Oscar E., et al.
(författare)
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In Vivo Effects of Mesenchymal Stromal Cells in Two Patients With Severe Acute Respiratory Distress Syndrome
- 2015
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Ingår i: Stem Cells Translational Medicine. - : Oxford University Press (OUP). - 2157-6564 .- 2157-6580. ; 4:10, s. 1199-1213
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Tidskriftsartikel (refereegranskat)abstract
- Mesenchymal stromal cells (MSCs) have been investigated as a treatment for various inflammatory diseases because of their immunomodulatory and reparative properties. However, many basic questions concerning their mechanisms of action after systemic infusion remain unanswered. We performed a detailed analysis of the immunomodulatory properties and proteomic profile of MSCs systemically administered to two patients with severe refractory acute respiratory distress syndrome (ARDS) on a compassionate use basis and attempted to correlate these with in vivo anti-inflammatory actions. Both patients received 2 x 10(6) cells per kilogram, and each subsequently improved with resolution of respiratory, hemodynamic, and multiorgan failure. In parallel, a decrease was seen in multiple pulmonary and systemic markers of inflammation, including epithelial apoptosis, alveolar-capillary fluid leakage, and proinflammatory cytokines, microRNAs, and chemokines. In vitro studies of the MSCs demonstrated a broad anti-inflammatory capacity, including suppression of T-cell responses and induction of regulatory phenotypes in T cells, monocytes, and neutrophils. Some of these in vitro potency assessments correlated with, and were relevant to, the observed in vivo actions. These experiences highlight both the mechanistic information that can be gained from clinical experience and the value of correlating in vitro potency assessments with clinical effects. The findings also suggest, but do not prove, a beneficial effect of lung protective strategies using adoptively transferred MSCs in ARDS. Appropriate randomized clinical trials are required to further assess any potential clinical efficacy and investigate the effects on in vivo inflammation. STEM CELLS TRANSLATIONAL MEDICINE 2015;4:1199-1213
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| 5. |
- Theofylaktopoulou, Despoina, et al.
(författare)
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Impaired functional vitamin B6 status is associated with increased risk of lung cancer
- 2018
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Ingår i: International Journal of Cancer. - : Wiley. - 0020-7136 .- 1097-0215. ; 142:12, s. 2425-2434
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Tidskriftsartikel (refereegranskat)abstract
- Circulating vitamin B6 levels have been found to be inversely associated with lung cancer. Most studies have focused on the B6 form pyridoxal 5'-phosphate (PLP), a direct biomarker influenced by inflammation and other factors. Using a functional B6 marker allows further investigation of the potential role of vitamin B6 status in the pathogenesis of lung cancer. We prospectively evaluated the association of the functional marker of vitamin B6 status, the 3-hydroxykynurenine:xanthurenic acid (HK:XA) ratio, with risk of lung cancer in a nested case-control study consisting of 5,364 matched case-control pairs from the Lung Cancer Cohort Consortium (LC3). We used conditional logistic regression to evaluate the association between HK:XA and lung cancer, and random effect models to combine results from different cohorts and regions. High levels of HK:XA, indicating impaired functional B6 status, were associated with an increased risk of lung cancer, the odds ratio comparing the fourth and the first quartiles (OR4th vs. 1st) was 1.25 (95% confidence interval, 1.10-1.41). Stratified analyses indicated that this association was primarily driven by cases diagnosed with squamous cell carcinoma. Notably, the risk associated with HK:XA was approximately 50% higher in groups with a high relative frequency of squamous cell carcinoma, i.e., men, former and current smokers. This risk of squamous cell carcinoma was present in both men and women regardless of smoking status.
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| 6. |
- Amsberg, Susanne, et al.
(författare)
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A cognitive behavior therapy-based intervention among poorly controlled adult type 1 diabetes patients : a randomized controlled trial
- 2009
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Ingår i: Patient Education and Counseling. - : Elsevier BV. - 0738-3991 .- 1873-5134. ; 77:1, s. 72-80
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVE: To examine the impact of a Cognitive Behavior Therapy (CBT)-based intervention on HbA(1c), self-care behaviors and psychosocial factors among poorly controlled adult type 1 diabetes patients. METHODS: Ninety-four type 1 diabetes patients were randomly assigned to either an intervention group or a control group. The intervention was based on CBT and was mainly delivered in group format, but individual sessions were also included. All subjects were provided with a continuous glucose monitoring system (CGMS) during two 3-day periods. HbA(1c), self-care behaviors and psychosocial factors were measured up to 48 weeks. RESULTS: Significant differences were observed with respect to HbA(1c) (P<0.05), well-being (P<0.05), diabetes-related distress (P<0.01), frequency of blood glucose testing (P<0.05), avoidance of hypoglycemia (P<0.01), perceived stress (P<0.05), anxiety (P<0.05) and depression (P<0.05), all of which showed greater improvement in the intervention group compared with the control group. A significant difference (P<0.05) was registered with respect to non-severe hypoglycemia, which yielded a higher score in the intervention group. CONCLUSION: This CBT-based intervention appears to be a promising approach to diabetes self-management. PRACTICE IMPLICATIONS: Diabetes care may benefit from applying tools commonly used in CBT. For further scientific evaluation in clinical practice, there is a need for specially educated diabetes care teams, trained in the current approach, as well as cooperation between diabetes care teams and psychologists trained in CBT.
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| 7. |
- Amsberg, Susanne, et al.
(författare)
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Experience from a behavioural medicine intervention among poorly controlled adult type 1 diabetes patients
- 2009
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Ingår i: Diabetes Research and Clinical Practice. - : Elsevier BV. - 0168-8227 .- 1872-8227. ; 84:1, s. 76-83
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Tidskriftsartikel (refereegranskat)abstract
- Aim To describe experience from a behavioural medicine intervention among poorly controlled adult type 1 diabetes patients, in terms of feasibility, predictors and associations of improved glycaemic control. Methods Data were collected on 94 poorly controlled adult type 1 diabetes patients who were randomised to a study evaluating the effects of a behavioural medicine intervention. Statistics covered descriptive and comparison analysis. Backward stepwise regression models were used for predictive and agreement analyses involving socio-demographic and medical factors, as well as measures of diabetes self-efficacy (DES), diabetes locus of control (DLOC), self-care activities (SDSCA), diabetes-related distress (Swe-PAID-20), fear of hypoglycaemia (HFS), well-being (WBQ), depression (HAD) and perceived stress (PSS). Results The participation rate in the study was 41% and attrition was 24%. Of those patients actually participating in the behavioural medicine intervention, 13% withdrew. From the regression models no predictors or associations of improvement in HbA1c were found. Conclusions The programme proved to be feasible in terms of design and methods. However, no clear pattern was found regarding predictors or associations of improved metabolic control as the response to the intervention. Further research in this area is called for.
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| 8. |
- Amsberg, Susanne
(författare)
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Health Promotion in Diabetes Care : Studies on Adult Type 1 Diabetes Patients
- 2008
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Introduction: A landmark report has shown that improving glycaemic control among type 1 diabetes patients markedly reduces diabetes-related complications. In clinical practice, however, many patients have problems in adhering to the treatment, and thus remain in poor glycaemic control. Research suggests a more behaviour-oriented approach to diabetes, but there is a lack of evidence on the efficacy of interventions, especially for those adult type 1 diabetes patients who are in poor glycaemic control. Diabetes-related distress has been associated with poor adherence to treatment and poor glycaemic control. There is a need for validated measures in this area, to identify patients who experience diabetes-related distress. Additionally, injection technique is crucial for the management of diabetes, and lipohypertrophy is a common side effect which deserves further attention.Objectives: The overall aim of this thesis was to evaluate a behavioural medicine intervention among poorly controlled adult type 1 diabetes patients, and to gain a deeper knowledge in an area of diabetes self-management.Methods: Quantitative design was used for the studies, and the clinical settings comprised two diabetes care units in Stockholm, Sweden. Study I: The Swedish version of the Problem Areas in Diabetes (Swe-PAID-20) scale was evaluated regarding its psychometric properties by type 1 diabetes patients, as well as by an expert panel of diabetes specialist nurses. Study II: A behavioural medicine intervention based on Cognitive Behaviour Therapy (CBT) was evaluated in a randomised controlled trial among poorly controlled adult type 1 diabetes patients. Study III: Using the same sample as in study II, descriptive statistics were produced, and predictive and comparative analyses performed, in order to find predictors of or associations with improvements in glycaemic control as a response to the intervention. Study IV: In a randomised crossover trial insulin absorption in lipohypertrophic injection sites was investigated in type 1 diabetes patients.Results and conclusions: Study I: A three-factor solution of the scale was found, comprising sub-dimensions of diabetes-related emotional problems, treatment-related problems and support-related problems. Cronbach’s alpha for the total score was 0.94 and varied between 0.61 and 0.94 in the three subscales. The findings also supported the convergent and content validity. The Swe-PAID-20 seems to be a reliable and valid outcome for measuring diabetes-related distress in type 1 diabetes patients. Study II: Significant differences were observed with respect to HbA1c, well-being, diabetes-related distress, frequency of blood glucose testing, fear of hypoglycaemia, perceived stress, and depression, all of which improved more in the intervention group compared with the control group. The CBT based behavioural medicine intervention appears to be a promising approach to diabetes self-management. Study III: The participation rate in the study was 41% and attrition was 24%. Of those patients who actually participated in the intervention, 13% withdrew. From the regression models no predictors or associations were found with regard to improvement in HbA1c. The programme proved to be feasible in terms of design and methods. However, no clear pattern was found regarding predictors of or associations with improved metabolic control. Study IV: Impairment of insulin absorption from lipohypertrophic injection sites was also found with analogue insulins. It is suggested that patients should be advised to refrain from injecting insulin aspart into lipohypertrophic subcutaneous tissue.
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| 9. |
- Amsberg, Susanne, et al.
(författare)
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The psychometric properties of the Swedish version of the Problem Areas in Diabetes Scale (Swe-PAID-20) : scale development
- 2008
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Ingår i: International Journal of Nursing Studies. - : Elsevier BV. - 0020-7489 .- 1873-491X. ; 45:9, s. 1319-28
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Considering the importance of psychological aspects in the management of diabetes, there is a need of validated measurements in this area. Such tools make it possible to screen patients for specific conditions as well as they serve as reliable measures when evaluating medical, psychological and educational interventions. OBJECTIVES: The current study was conducted to adapt the Problem Areas in Diabetes Scale for use among Swedish-speaking patients with type 1 diabetes and to evaluate the psychometric properties. DESIGN: Methodological research design was used in this study. SETTING AND PARTICIPANTS: A convenience sample of 325 type 1 diabetes patients was systematically selected from the local diabetes registry of a university hospital in Stockholm, Sweden. METHODS: Following the linguistic adaptation using the forward-backward translation method, the 20-item PAID was answered by the selected patients. Statistics covered exploratory factor analysis, Cronbach's alpha, convergent validity and content validity. RESULTS: In the factor analysis a three-factor solution was found to be reasonable with the sub-dimensions diabetes-related emotional problems (15 items), treatment-related problems (2 items) and support-related problems (3 items). Cronbach's alpha coefficient for the total score was 0.94 and varied between 0.61 and 0.94 in the three subscales. The findings also gave support for the convergent and content validity. CONCLUSIONS: The Swedish version of the Problem Areas in Diabetes Scale (Swe-PAID-20) seems to be a reliable and valid outcome for measuring diabetes-related emotional distress in type 1 diabetes patients.
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| 10. |
- Anderbro, Therese, et al.
(författare)
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Fear of hypoglycaemia in adults with type 1 diabetes
- 2010
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Ingår i: Diabetic Medicine. - : Wiley. - 0742-3071 .- 1464-5491. ; 27:10, s. 1151-8
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Forskningsöversikt (refereegranskat)abstract
- Aims The aim of this study was to examine the fear of hypoglycaemia and its association with demographic and disease-specific variables in a large and unselective population of adult patients with Type 1 diabetes. Methods Questionnaires were sent by post to all patients with Type 1 diabetes who were identified in the local diabetes registries of two hospitals in Stockholm, Sweden (n = 1387). Fear of hypoglycaemia was measured using the Swedish Hypoglycaemia Fear Survey, the Worry subscale and the Aloneness subscale. Demographic variables and disease-specific factors were collected from patients' self reports and medical records. Univariate analysis and multiple stepwise linear regression analysis were used in the statistical analyses of the data. Results Seven hundred and sixty-four (55%) patients participated in the study (mean age 43.3 years and mean HbA(1c) 7.0%, normal < 5.0%). The Hypoglycaemia Fear Survey - Worry subscale was significantly associated with frequency of severe hypoglycaemia, number of symptoms during mild hypoglycaemia, gender, hypoglycaemic symptoms during hyperglycaemia and hypoglycaemic unawareness. The Hypoglycaemia Fear Survey - Aloneness subscale was significantly associated with frequency of severe hypoglycaemia, number of symptoms during mild hypoglycaemia, gender, frequency of mild hypoglycaemia, HbA(1c) , hypoglycaemic unawareness and visits to the emergency room because of severe hypoglycaemia. Fear of hypoglycaemia proved to be more prevalent in females and indicated a different pattern between genders in relation to factors associated with fear of hypoglycaemia. Conclusions This study identifies the frequency of severe hypoglycaemia as the most important factor associated with fear of hypoglycaemia. Moreover, for the first time, we document gender differences in fear of hypoglycaemia, suggesting that females are more affected by fear of hypoglycaemia than men.
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