| 1. |
- Blomstrand, Peter, et al.
(author)
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Overweight and obesity impair left ventricular systolic function as measured by left ventricular ejection fraction and global longitudinal strain
- 2018
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In: Cardiovascular Diabetology. - : BioMed Central. - 1475-2840. ; 17:1
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Journal article (peer-reviewed)abstract
- AimsObesity is associated with type 2 diabetes mellitus, left ventricular diastolic dysfunction and heart failure but it is unclear to which extent it is related to left ventricular systolic dysfunction. The aim of the study was to explore the effects of overweight and obesity on left ventricular systolic function in patients with type 2 diabetes mellitus and a control group of non-diabetic persons.MethodsWe prospectively investigated 384 patients with type 2 diabetes mellitus, and 184 controls who participated in the CARDIPP and CAREFUL studies. The participants were grouped according to body mass index (normal weight < 25 kg/m2, overweight 25–29 kg/m2, and obesity ≥ 30 kg/m2). Echocardiography was performed at the beginning of the study and after 4-years in the patient group.ResultsUnivariable and multivariable regression analysis revealed that variations in left ventricular ejection fraction, global longitudinal strain, left ventricular mass and diastolic function expressed as E/é (the ratio between early diastolic mitral flow and annular motion velocities) all are related to body mass index. The mean and standard deviation of left ventricular ejection fraction and global longitudinal strain values were 57% (8%) vs. − 18.6% (2.3%) for normal weight patients, 53% (8%) vs. − 17.5% (2.3%) for overweight, and 49% (9%) vs. − 16.2% (3.0%) for obese (p < 0.05 vs. p < 0.05). Corresponding results in the control group were 58% (6%) vs. − 22.3% (3.0%), 55% (7%) vs. − 20.8% (3.1%) and 54% (8%) − 19.6% (4.0%) (p < 0.05 vs. p < 0.05). Patients who gained weight from baseline to follow-up changed left ventricular ejection fraction (median and interquartile range) by − 1.0 (9.0) % (n = 187) and patients who lost weight changed left ventricular ejection fraction by 1.0 (10.0) % (n = 179) (p < 0.05).ConclusionOverweight and obesity impair left ventricular ejection fraction and global longitudinal strain in both patients with type 2 diabetes mellitus and non-diabetic persons.
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| 2. |
- Bojmar, Linda, et al.
(author)
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Multi-parametric atlas of the pre-metastatic liver for prediction of metastatic outcome in early-stage pancreatic cancer
- 2024
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In: Nature Medicine. - : NATURE PORTFOLIO. - 1078-8956 .- 1546-170X.
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Journal article (peer-reviewed)abstract
- Metastasis occurs frequently after resection of pancreatic cancer (PaC). In this study, we hypothesized that multi-parametric analysis of pre-metastatic liver biopsies would classify patients according to their metastatic risk, timing and organ site. Liver biopsies obtained during pancreatectomy from 49 patients with localized PaC and 19 control patients with non-cancerous pancreatic lesions were analyzed, combining metabolomic, tissue and single-cell transcriptomics and multiplex imaging approaches. Patients were followed prospectively (median 3 years) and classified into four recurrence groups; early (<6 months after resection) or late (>6 months after resection) liver metastasis (LiM); extrahepatic metastasis (EHM); and disease-free survivors (no evidence of disease (NED)). Overall, PaC livers exhibited signs of augmented inflammation compared to controls. Enrichment of neutrophil extracellular traps (NETs), Ki-67 upregulation and decreased liver creatine significantly distinguished those with future metastasis from NED. Patients with future LiM were characterized by scant T cell lobular infiltration, less steatosis and higher levels of citrullinated H3 compared to patients who developed EHM, who had overexpression of interferon target genes (MX1 and NR1D1) and an increase of CD11B(+) natural killer (NK) cells. Upregulation of sortilin-1 and prominent NETs, together with the lack of T cells and a reduction in CD11B(+) NK cells, differentiated patients with early-onset LiM from those with late-onset LiM. Liver profiles of NED closely resembled those of controls. Using the above parameters, a machine-learning-based model was developed that successfully predicted the metastatic outcome at the time of surgery with 78% accuracy. Therefore, multi-parametric profiling of liver biopsies at the time of PaC diagnosis may determine metastatic risk and organotropism and guide clinical stratification for optimal treatment selection.<br />
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| 3. |
- Marie, Blomstrand, et al.
(author)
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Systematic bladder scanning identifies more women with postpartum urinary retention than diagnosis by clinical signs and symptoms
- 2015
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In: International Journal of Nursing and Midwifery. - : Academic Journals. - 2141-2456. ; 7:6, s. 108-115
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Journal article (peer-reviewed)abstract
- This study aims to determine if systematic use of bladder scan accurately identifies more women with postpartum urinary retention compared with diagnosis using clinical signs and symptoms, alone. A prospective, quasi experimental study was performed at the Department of Obstetrics and Gynecology, County Hospital Ryhov, Jönköping, Sweden. A total of 252 women participated in this study; they were women who gave birth between the period of March and April, 2011. One hundred and twenty-six women were included in an experimental group, they received ultrasound scanning of post-void residual bladder volume for identification of urinary retention; patients were catheterized if post-void residual bladder volume was ≥400 ml. A control group of 126 women, matched by parity and age, were also included. The latter group were catheterized on clinical signs or symptoms of urinary retention. Twenty-one women in the experimental group were identified as having post-void residual bladder volume ≥400 ml compared to 9 in the control group, verified by catheterization (p < 0.05). Eleven women in the experimental group had covert urinary retention with a post-void residual bladder volume of 400 to 1200 ml. No woman who gave birth by caesarean section was identified with postpartum urinary retention. Univariable logistic regression analyses identified seven risk indicators of postpartum urinary retention: first pregnancy, delivery with use of ventouse, oxytocin infusion, epidural analgesia, second stage of >120 min, active pushing >30 min and perineal tear. Oxytocin infusion and perineal tear were independent risk indicators in a multivariable regression analysis. Systematic bladder scanning identifies more women with postpartum urinary retention in women with vaginal delivery than diagnosis by clinical signs and symptoms, alone. Oxytocin infusion and perineal tear are independent risk indicators for urinary retention in new delivered women.
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| 4. |
- Åberg, N David, 1970, et al.
(author)
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Insulin-like growth factor-I increases astrocyte intercellular gap junctional communication and connexin43 expression in vitro.
- 2003
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In: Journal of neuroscience research. - : Wiley. - 0360-4012. ; 74:1, s. 12-22
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Journal article (peer-reviewed)abstract
- Connexin43 (cx43) forms gap junctions in astrocytes, and these gap junctions mediate intercellular communication by providing transport of low-molecular-weight metabolites and ions. We have recently shown that systemic growth hormone increases cx43 in the brain. One possibility was that local brain insulin-like growth factor-I (IGF-I) could mediate the effect by acting directly on astrocytes. In the present study, we examined the effects of direct application of recombinant human IGF-I (rhIGF-I) on astrocytes in primary culture concerning cx43 protein expression and gap junctional communication (GJC). After 24 hr of stimulation with rhIGF-I under serum-free conditions, the GJC and cx43 protein were analyzed. Administration of 30 ng/ml rhIGF-I increased the GJC and the abundance of cx43 protein. Cell proliferation of the astrocytes was not significantly increased by rhIGF-I at this concentration. However, a higher concentration of rhIGF-I (150 ng/ml) had no effect on GJC/cx43 but increased cell proliferation. Because of the important modulatory role of IGF binding proteins (IGFBPs) on IGF-I action, we analyzed IGFBPs in conditioned media. In cultures with a low abundance of IGFBPs (especially IGFBP-2), the GJC response to 30 ng/ml rhIGF-I was 81%, compared with the average of 25%. Finally, as a control, insulin was given in equimolar concentrations. However, GJC was not affected, which suggests that rhIGF-I acted via IGF-I receptors. In summary, the data show that rhIGF-I may increase GJC/cx43, whereas a higher concentration of rhIGF-I--at which stimulation of proliferation occurred--did not affect GJC/cx43. Furthermore, IGFBP-2 appeared to modulate the action of rhIGF-I on GJC in astrocytes by a paracrine mechanism.
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| 5. |
- Atefyekta, Saba, 1987, et al.
(author)
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Antimicrobial Peptide-Functionalized Mesoporous Hydrogels
- 2021
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In: ACS Biomaterials Science & Engineering. - : American Chemical Society (ACS). - 2373-9878. ; 7:4, s. 1693-1702
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Journal article (peer-reviewed)abstract
- Antimicrobial peptides (AMPs) are seen as a promising replacement to conventional antibiotics for the prevention of skin wound infections. However, due to the short half-life of AMPs in biological environments, such as blood, their use in clinical applications has been limited. The covalent immobilization of AMPs onto suitable substrates is an effective solution to create contact-killing surfaces with increased long-term stability. In this work, an antimicrobial peptide, RRPRPRPRPWWWW-NH2 (RRP9W4N), was covalently attached to amphiphilic and ordered mesoporous Pluronic F127 hydrogels made of cross-linked lyotropic liquid crystals through 1-ethyl-3-(3-(dimethylamino)propyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) chemistry. The AMP-hydrogels showed high antibacterial activity against Staphylococcus epidermidis, Staphylococcus aureus, Pseudomonas aeruginosa, methicillin-resistant S. aureus (MRSA), and multidrug-resistant Escherichia coli for up to 24 h. Furthermore, the AMP-hydrogels did not present any toxicity to human fibroblasts. The AMPs retained their antimicrobial activity up to 48 h in human blood serum, which is a significant increase in stability compared to when used in dissolved state. A pilot in vivo rat model showed 10-100x less viable counts of S. aureus on AMP-hydrogels compared with control hydrogels during the first 3 days of infection. Studies performed on human whole blood showed that blood coagulated more readily in the presence of AMP-hydrogels as compared to hydrogels without AMPs, indicating potential hemostatic activity. Overall, the results suggest that the combination of amphiphilic hydrogels with covalently bonded AMPs has potential to be used as antibacterial wound dressing material to reduce infections and promote hemostatic activity as an alternative to antibiotics or other antimicrobial agents, whose use should be restricted.
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| 6. |
- Blomstrand, Ann, et al.
(author)
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Low-budget method for lifestyle improvement in primary care. Experiences from the Göteborg Health Profile Project.
- 2005
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In: Scandinavian journal of primary health care. - : Informa UK Limited. - 0281-3432 .- 1502-7724. ; 23:2, s. 82-7
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Journal article (peer-reviewed)abstract
- OBJECTIVE: To describe a self-administered preventive tool dealing with risk factors for cardiovascular disease and its effect with special reference to the question: did the project involve persons most in need of lifestyle changes? DESIGN: Screening questions offered to consecutive patients and followed by a self-administered health profile, intervention, and follow-up. Setting. Primary healthcare area of Askim, Sweden. SUBJECTS: Men and women between 18 and 65 years of age visiting GPs for acute disorders or planned visits during a three-month period were offered screening questions and, if wanted, a health profile. MAIN OUTCOME MEASURES: Participation rates, effects on lifestyle factors. RESULTS: There was an overrepresentation of subjects with a less favourable lifestyle among those who asked for the health profile. There was good agreement for all variables between self-estimation in screening questions and grading in the basal health profile. Lifestyle improvement was observed for dietary habits, physical activity, and mental stress at the one year follow-up. CONCLUSIONS: The results indicate that a relevant selection of persons with a "risk profile" can be made by means of simple screening questions. The pedagogic model using self-administered health profile in combination with own responsibility seems to be a tool for low-budget preventive work in primary healthcare.
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| 7. |
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| 8. |
- Blomstrand, Eva, et al.
(author)
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Exercise training induces similar elevations in the activity of oxoglutarate dehydrogenase and peak oxygen uptake in the human quadriceps muscle.
- 2011
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In: Pflügers Archiv. - : Springer Science and Business Media LLC. - 0031-6768 .- 1432-2013. ; 462:2, s. 257-65
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Journal article (peer-reviewed)abstract
- During exercise involving a small muscle mass, peak oxygen uptake is thought to be limited by peripheral factors, such as the degree of oxygen extraction from the blood and/or mitochondrial oxidative capacity. Previously, the maximal activity of the Krebs cycle enzyme oxoglutarate dehydrogenase has been shown to provide a quantitative measure of maximal oxidative metabolism, but it is not known whether the increase in this activity after a period of training reflects the elevation in peak oxygen consumption. Fourteen subjects performed one-legged knee extension exercise for 5-7 weeks, while the other leg remained untrained. Thereafter, the peak oxygen uptake by the quadriceps muscle was determined for both legs, and muscle biopsies were taken for assays of maximal enzyme activities (at 25°C). The peak oxygen uptake was 26% higher in the trained than in the untrained muscle (395 vs. 315 ml min(-1) kg(-1), respectively; P<0.01). The maximal activities of the Krebs cycle enzymes in the trained and untrained muscle were as follows: citrate synthase, 22.4 vs. 18.2 μmol min(-1) g(-1) (23%, P<0.05); oxoglutarate dehydrogenase, 1.88 vs. 1.54 μmol min(-1) g(-1) (22%, P<0.05); and succinate dehydrogenase, 3.88 vs. 3.28 μmol min(-1) g(-1) (18%, P<0.05). The difference between the trained and untrained muscles with respect to peak oxygen uptake (80 ml min(-1) kg(-1)) corresponded to a flux through the Krebs cycle of 1.05 μmol min(-1) g(-1), and the corresponding difference in oxoglutarate dehydrogenase activity (at 38°C) was 0.83 μmol min(-1) g(-1). These parallel increases suggest that there is no excess mitochondrial capacity during maximal exercise with a small muscle mass.
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| 9. |
- Blomstrand, Eva, et al.
(author)
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Influence of ingesting a solution of branched-chain amino acids on perceived exertion during exercise.
- 1997
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In: Acta Physiologica Scandinavica. - 0001-6772 .- 1365-201X. ; 159:1, s. 41-9
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Journal article (peer-reviewed)abstract
- On two occasions, seven male endurance-trained cyclists performed exhaustive exercise on a cycle ergometer in the morning after they had performed a bout of exercise the preceding evening in an attempt to lower the muscle glycogen stores. The subjects exercised at a work rate corresponding to approximately 70% of their maximal oxygen uptake for 60 min, followed by another 20 min of maximal exercise. During exercise the subjects were given either a solution of branched-chain amino acids (BCAAs) or flavoured water (placebo). Every 10 min during exercise the subjects rated their perceived exertion and mental fatigue on two different Borg scales. During the 60 min exercise at a given work rate the subjects ratings of perceived exertion when they were given BCAAs were 7% lower, and their ratings of mental fatigue were 15% lower than when they were given placebo. In addition, the performance in the colour task of Stroops Colour Word Test performed after exercise was improved when BCAAs had been ingested during exercise, compared with the results from the placebo trial. There was no difference in the physical performance between the two trials measured as the amount of work done during the last 20 min of exercise when the subjects performed at their maximum. The plasma concentration ratio of free tryptophan/BCAAs, which increased by 45% during exercise and by 150% 5 min after exercise in the placebo trial, remained unchanged or even decreased when BCAAs were ingested.
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| 10. |
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