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Bergström M, Larsson Ranada Å, Sverker A, Thyberg I, Björk M. A dyadic exploration of support in everyday life of persons with RA and their significant others. Scand J Occup Ther 2023; 30:616-627. [PMID: 34846249 DOI: 10.1080/11038128.2021.2007997] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 10/22/2021] [Accepted: 11/13/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Support from significant others is important for participation in everyday life for persons with rheumatoid arthritis (RA). Meanwhile, significant others also experience limitations. AIMS To explore how support is expressed by persons with RA and significant others, and how support relates to participation in everyday life of persons with RA. MATERIAL AND METHODS Sixteen persons with RA and their significant others participated in individual semi-structured interviews. The material was analyzed using dyadic analysis. RESULTS Persons with RA and significant others reported that RA and support had become natural parts of everyday life, especially emotional support. The reciprocal dynamics of support were also expressed as imperative. Also, support from people outside of the dyads and well-functioning communication facilitated everyday life. CONCLUSIONS Significant others and the support they give are prominent factors and facilitators in everyday life of persons with RA. Concurrently, the support persons with RA provide is important, along with support from outside of the dyads. SIGNIFICANCE The results indicate that the interaction between persons with RA and the social environment is central to gain insight into how support should be provided for optimal participation in everyday life. Significant others can preferably be more involved in the rehabilitation process.
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Affiliation(s)
- Maria Bergström
- Department of Health, Medicine and Caring Sciences, Linköping University, Norrköping, Sweden
| | - Åsa Larsson Ranada
- Department of Health, Medicine and Caring Sciences, Linköping University, Norrköping, Sweden
| | - Annette Sverker
- Department of Activity and Health and Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
| | - Ingrid Thyberg
- Department of Rheumatology in Östergötland, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Mathilda Björk
- Pain and Rehabilitation Centre and Department of Health, Medicine and Caring Sciences, Linköping University, Linköping, Sweden
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2
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Liu J, Hefni ME, Witthöft CM, Bergström M, Burleigh S, Nyman M, Hållenius F. On the effect of flavonoids and dietary fibre in lingonberries on atherosclerotic plaques, lipid profiles and gut microbiota composition in Apoe-/- mice. Int J Food Sci Nutr 2022; 73:1080-1090. [PMID: 35930435 DOI: 10.1080/09637486.2022.2106358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Abstract
It has not been clarified whether the anti-atherosclerotic effect of lingonberry can be ascribed to its content of flavonoids or dietary fibre or both. The aim of this study was to evaluate the metabolic effects of whole lingonberries compared with isolated flavonoid and fibre fractions on atherosclerotic plaques, plasma lipid profiles, gut microbiota and microbiota-dependent metabolites in an Apoe-/- mouse model. Mice fed whole lingonberries showed the lowest amount of atherosclerotic plaques, while mice fed the fibre fraction had the highest formation of caecal butyric acid. Flavonoids, rather than dietary fibre, were suggested to be the components that favour proliferation of Akkermansia, as judged by the lowest abundance of this bacterium in mice fed the fibre fraction. All groups fed lingonberry diets had both, lower Firmicutes/Bacteroidetes ratios and creatinine concentrations, compared with the control. To conclude, different components in lingonberries are associated with different physiological effects in Apoe-/- mice.
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Affiliation(s)
- Jiyun Liu
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, Kalmar, Sweden
| | - Mohammed E Hefni
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, Kalmar, Sweden.,Food Industries Department, Faculty of Agriculture, Mansoura University, Mansoura, Egypt
| | - Cornelia M Witthöft
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, Kalmar, Sweden
| | - Maria Bergström
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, Kalmar, Sweden
| | - Stephen Burleigh
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
| | - Margareta Nyman
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
| | - Frida Hållenius
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
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3
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Liu J, Hefni ME, Witthöft CM, Bergström M, Burleigh S, Nyman M, Hållenius F. Effects of Whole Brown Bean and Its Isolated Fiber Fraction on Plasma Lipid Profile, Atherosclerosis, Gut Microbiota, and Microbiota-Dependent Metabolites in Apoe-/- Mice. Nutrients 2022; 14:nu14050937. [PMID: 35267913 PMCID: PMC8912725 DOI: 10.3390/nu14050937] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 02/10/2022] [Accepted: 02/18/2022] [Indexed: 12/21/2022] Open
Abstract
The health benefits of bean consumption are widely recognized and are largely attributed to the dietary fiber content. This study investigated and compared the effects of whole brown beans and an isolated bean dietary fiber fraction on the plasma lipid profile, atherosclerotic plaque amount, gut microbiota, and microbiota-dependent metabolites (cecal short-chain fatty acids (SCFAs) and plasma methylamines) in Apoe−/− mice fed high fat diets for 10.5 weeks. The results showed that both whole bean and the isolated fiber fraction had a tendency to lower atherosclerotic plaque amount, but not plasma lipid concentration. The whole bean diet led to a significantly higher diversity of gut microbiota compared with the high fat diet. Both bean diets resulted in a lower Firmicutes/Bacteroidetes ratio, higher relative abundance of unclassified S24-7, Prevotella, Bifidobacterium, and unclassified Clostridiales, and lower abundance of Lactobacillus. Both bean diets resulted in higher formation of all cecal SCFAs (higher proportion of propionic acid and lower proportion of acetic acid) and higher plasma trimethylamine N-oxide concentrations compared with the high fat diet. Whole beans and the isolated fiber fraction exerted similar positive effects on atherosclerotic plaque amount, gut microbiota, and cecal SCFAs in Apoe−/− mice compared with the control diets.
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Affiliation(s)
- Jiyun Liu
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, 39231 Kalmar, Sweden; (M.E.H.); (C.M.W.); (M.B.)
- Correspondence: ; Tel.: +46-072-451-6957
| | - Mohammed E. Hefni
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, 39231 Kalmar, Sweden; (M.E.H.); (C.M.W.); (M.B.)
- Food Industries Department, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Cornelia M. Witthöft
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, 39231 Kalmar, Sweden; (M.E.H.); (C.M.W.); (M.B.)
| | - Maria Bergström
- Department of Chemistry and Biomedical Sciences, Faculty of Health and Life Sciences, Linnaeus University, 39231 Kalmar, Sweden; (M.E.H.); (C.M.W.); (M.B.)
| | - Stephen Burleigh
- Department of Food Technology, Engineering and Nutrition, Lund University, 22100 Lund, Sweden; (S.B.); (M.N.); (F.H.)
| | - Margareta Nyman
- Department of Food Technology, Engineering and Nutrition, Lund University, 22100 Lund, Sweden; (S.B.); (M.N.); (F.H.)
| | - Frida Hållenius
- Department of Food Technology, Engineering and Nutrition, Lund University, 22100 Lund, Sweden; (S.B.); (M.N.); (F.H.)
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Hefni ME, Bergström M, Lennqvist T, Fagerström C, Witthöft CM. Simultaneous quantification of trimethylamine N-oxide, trimethylamine, choline, betaine, creatinine, and propionyl-, acetyl-, and L-carnitine in clinical and food samples using HILIC-LC-MS. Anal Bioanal Chem 2021; 413:5349-5360. [PMID: 34258650 PMCID: PMC8405501 DOI: 10.1007/s00216-021-03509-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 06/15/2021] [Accepted: 06/28/2021] [Indexed: 01/22/2023]
Abstract
Trimethylamine-N-oxide (TMAO), a microbiome-derived metabolite from the metabolism of choline, betaine, and carnitines, is associated to adverse cardiovascular outcomes. A method suitable for routine quantification of TMAO and its precursors (trimethylamine (TMA), choline, betaine, creatinine, and propionyl-, acetyl-, and l-carnitine) in clinical and food samples has been developed based on LC-MS. TMA was successfully derivatized using iodoacetonitrile, and no cross-reactions with TMAO or the other methylamines were detected. Extraction from clinical samples (plasma and urine) was performed after protein precipitation using acetonitrile:methanol. For food samples (meatballs and eggs), water extraction was shown to be sufficient, but acid hydrolysis was required to release bound choline before extraction. Baseline separation of the methylamines was achieved using a neutral HILIC column and a mobile phase consisting of 25 mmol/L ammonium formate in water:ACN (30:70). Quantification was performed by MS using external calibration and isotopic labelled internal standards. The assay proved suitable for both clinical and food samples and was linear from ≈ 0.1 up to 200 μmol/L for all methylamines except for TMA and TMAO, which were linear up to 100 μmol/L. Recoveries were 91–107% in clinical samples and 76–98% in food samples. The interday (n=8, four duplicate analysis) CVs were below 9% for all metabolites in clinical and food samples. The method was applied successfully to determine the methylamine concentrations in plasma and urine from the subjects participating in an intervention trial (n=10) to determine the effect of animal food ingestion on methylamine concentrations.
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Affiliation(s)
- Mohammed E Hefni
- Department of Chemistry and Biomedical Sciences, Linnaeus University, 392 31, Kalmar, Sweden.
- Food Industries Department, Faculty of Agriculture, Mansoura University, P.O. Box 46, Mansoura, 35516, Egypt.
| | - Maria Bergström
- Department of Chemistry and Biomedical Sciences, Linnaeus University, 392 31, Kalmar, Sweden
| | - Torbjörn Lennqvist
- Department of Chemistry and Biomedical Sciences, Linnaeus University, 392 31, Kalmar, Sweden
| | - Cecilia Fagerström
- Department of Health and Caring Sciences, Linnaeus University, 392 31, Kalmar, Sweden
| | - Cornelia M Witthöft
- Department of Chemistry and Biomedical Sciences, Linnaeus University, 392 31, Kalmar, Sweden
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Bergström M, Dahlström Ö, Thyberg I, Björk M. The role of support from significant others in the association between disease-related factors and sickness absence in early rheumatoid arthritis: a longitudinal study. Scand J Rheumatol 2021; 50:427-434. [PMID: 33678129 DOI: 10.1080/03009742.2020.1870712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Objective: The aim of this study was to analyse how support from significant others affects the associations between disease-related variables and sickness absence during the first 2 years after rheumatoid arthritis (RA) diagnosis.Method: Data from 274 people with RA (73% women) of working age (18-63 years) were retrieved from the Swedish early RA cohort TIRA-2. These data concerned disease-related variables (disease activity, activity limitations, pain intensity, and grip force), sickness absence, and perceived support from significant others. Associations of disease-related variables with sickness absence and how these associations were moderated by support from significant others were analysed using zero-inflated negative binomial regression.Results: During the 2 years after diagnosis, higher disease activity was significantly associated with increased odds of sickness absence, a connection strengthened by perceived support from family during the first year. More perceived support was also directly and significantly associated with increased odds of sickness absence during the first year.Conclusions: Support from significant others is related to sickness absence in RA, specifically during the first year after diagnosis. Although patients report high levels of support from significant others, this does not necessarily lead to more positive work outcomes. Therefore, it is important to consider other aspects of support that might influence work outcomes, e.g. type and quality of support. Future research should investigate these forms of support, and when significant others should be encouraged to support in the rehabilitation process to increase the chances of people with RA having a well-functioning and sustainable work life.
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Affiliation(s)
- M Bergström
- Unit of Occupational Therapy, Department of Health, Medicine and Caring Sciences, Faculty of Health Sciences, Linköping University, Norrköping, Sweden
| | - Ö Dahlström
- Department of Behavioural Sciences and Learning, Faculty of Arts and Sciences, Linköping University, Linköping, Sweden
| | - I Thyberg
- Department of Rheumatology in Östergötland, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - M Björk
- Unit of Occupational Therapy, Department of Health, Medicine and Caring Sciences, Faculty of Health Sciences, Linköping University, Norrköping, Sweden.,Department of Rheumatology in Östergötland, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
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6
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Arroyo Vázquez JA, Khodakaram K, Bergström M, Park PO. Stent treatment or surgical closure for perforated duodenal ulcers: a prospective randomized study. Surg Endosc 2020; 35:7183-7190. [PMID: 33258032 PMCID: PMC8599331 DOI: 10.1007/s00464-020-08158-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 11/06/2020] [Indexed: 11/30/2022]
Abstract
Background Perforated peptic ulcer is a life-threatening condition. Traditional treatment is surgery. Esophageal perforations and anastomotic leakages can be treated with endoscopically placed covered stents and drainage. We have treated selected patients with a perforated duodenal ulcer with a partially covered stent. The aim of this study was to compare surgery with stent treatment for perforated duodenal ulcers in a multicenter randomized controlled trial. Methods All patients presenting at the ER with abdominal pain, clinical signs of an upper G-I perforation, and free air on CT were approached for inclusion and randomized between surgical closure and stent treatment. Age, ASA score, operation time, complications, and hospital stay were recorded. Laparoscopy was performed in all patients to establish diagnosis. Surgical closure was performed using open or laparoscopic techniques. For stent treatment, a per-operative gastroscopy was performed and a partially covered stent was placed through the scope. Abdominal lavage was performed in all patients, and a drain was placed. All patients received antibiotics and intravenous PPI. Stents were endoscopically removed after 2–3 weeks. Complications were recorded and classified according to Clavien-Dindo (C-D). Results 43 patients were included, 28 had a verified perforated duodenal ulcer, 15 were randomized to surgery, and 13 to stent. Median age was 77.5 years (23–91) with no difference between groups. ASA score was unevenly distributed between the groups (p = 0.069). Operation time was significantly shorter in the stent group, 68 min (48–107) versus 92 min (68–154) (p = 0.001). Stents were removed after a median of 21 days (11–37 days) without complications. Six patients in the surgical group had a complication and seven patients in the stent group (C-D 2–5) (n.s.). Conclusions Stent treatment together with laparoscopic lavage and drainage offers a safe alternative to traditional surgical closure in perforated duodenal ulcer. A larger sample size would be necessary to show non-inferiority regarding stent treatment.
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Affiliation(s)
- Jorge Alberto Arroyo Vázquez
- Department of Surgery, South Älvsborg Hospital, Brämhultsvägen 53, 501 82, Borås, Sweden. .,University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden.
| | - Kaveh Khodakaram
- Department of Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Maria Bergström
- Department of Surgery, Halland Hospital, Varberg, Sweden.,University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
| | - Per-Ola Park
- Department of Surgery, Halland Hospital, Varberg, Sweden.,University of Gothenburg, Sahlgrenska Academy, Gothenburg, Sweden
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Björk M, Bergström M, Sverker A, Brodin N. Measures of Participation in Persons With Musculoskeletal Conditions. Arthritis Care Res (Hoboken) 2020; 72 Suppl 10:486-498. [PMID: 33091247 DOI: 10.1002/acr.24226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 04/14/2020] [Indexed: 11/07/2022]
Affiliation(s)
- M Björk
- Linköping University, Linköping, Sweden
| | - M Bergström
- Linköping University, Norrköping Campus, Norrköping, Sweden
| | - A Sverker
- Linköping University, Linköping, Sweden
| | - N Brodin
- Karolinska Institutet, Huddinge, Sweden, and Danderyd Hospital, Stockholm, Sweden
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8
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Monaco S, Walpole S, Doukani H, Nepravishta R, Martínez‐Bailén M, Carmona AT, Ramos‐Soriano J, Bergström M, Robina I, Angulo J. Exploring Multi-Subsite Binding Pockets in Proteins: DEEP-STD NMR Fingerprinting and Molecular Dynamics Unveil a Cryptic Subsite at the GM1 Binding Pocket of Cholera Toxin B. Chemistry 2020; 26:10024-10034. [PMID: 32449563 PMCID: PMC7496166 DOI: 10.1002/chem.202001723] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/08/2020] [Indexed: 11/30/2022]
Abstract
Ligand-based NMR techniques to study protein-ligand interactions are potent tools in drug design. Saturation transfer difference (STD) NMR spectroscopy stands out as one of the most versatile techniques, allowing screening of fragments libraries and providing structural information on binding modes. Recently, it has been shown that a multi-frequency STD NMR approach, differential epitope mapping (DEEP)-STD NMR, can provide additional information on the orientation of small ligands within the binding pocket. Here, the approach is extended to a so-called DEEP-STD NMR fingerprinting technique to explore the binding subsites of cholera toxin subunit B (CTB). To that aim, the synthesis of a set of new ligands is presented, which have been subject to a thorough study of their interactions with CTB by weak affinity chromatography (WAC) and NMR spectroscopy. Remarkably, the combination of DEEP-STD NMR fingerprinting and Hamiltonian replica exchange molecular dynamics has proved to be an excellent approach to explore the geometry, flexibility, and ligand occupancy of multi-subsite binding pockets. In the particular case of CTB, it allowed the existence of a hitherto unknown binding subsite adjacent to the GM1 binding pocket to be revealed, paving the way to the design of novel leads for inhibition of this relevant toxin.
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Affiliation(s)
- Serena Monaco
- School of PharmacyUniversity of East AngliaNorwich Research ParkNR4 7TJNorwichUK
| | - Samuel Walpole
- School of PharmacyUniversity of East AngliaNorwich Research ParkNR4 7TJNorwichUK
| | - Hassan Doukani
- School of PharmacyUniversity of East AngliaNorwich Research ParkNR4 7TJNorwichUK
| | - Ridvan Nepravishta
- School of PharmacyUniversity of East AngliaNorwich Research ParkNR4 7TJNorwichUK
- Department of Biochemistry & Molecular BiologySealy Center for Structural Biology & Molecular BiophysicsUniversity of Texas Medical Branch301 University BlvdGalvestonTX77555-1068USA
| | | | - Ana T. Carmona
- Department of Organic ChemistryFaculty of ChemistryUniversity of Seville41012SevilleSpain
| | - Javier Ramos‐Soriano
- Department of Organic ChemistryFaculty of ChemistryUniversity of Seville41012SevilleSpain
| | - Maria Bergström
- Department of Chemistry and Biomedical SciencesLinnaeus University391 82KalmarSweden
| | - Inmaculada Robina
- Department of Organic ChemistryFaculty of ChemistryUniversity of Seville41012SevilleSpain
| | - Jesus Angulo
- School of PharmacyUniversity of East AngliaNorwich Research ParkNR4 7TJNorwichUK
- Department of Organic ChemistryFaculty of ChemistryUniversity of Seville41012SevilleSpain
- Instituto de Investigaciones Químicas (CSIC-US)Avda. Américo Vespucio, 4941092SevillaSpain
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Bergström M, Larsson Ranada Å, Sverker A, Thyberg I, Bjork M. OP0330-HPR ‘THE BEST THING WE HAVE IS EACH OTHER’ – A QUALITATIVE DYADIC APPROACH TO EXPLORE SUPPORT IN EVERYDAY LIFE BETWEEN PERSONS WITH RA AND THEIR SIGNIFICANT OTHERS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.4255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Participation in everyday life and the relationships between persons with rheumatoid arthritis (RA) and their significant others are often affected by the disease. Usually, both parts need to adapt to new roles [1]. However, the dyadic interaction between them in everyday life is yet to be understood on a deeper level.Objectives:To exploreI) How dyads consisting of persons with RA and their significant others comprehend support and participation in everyday life, andII) how the dyadic interaction can influence their experience of participation in everyday life.Methods:In-depth individual interviews were conducted both with the persons with RA 12-13 years after diagnosis and inclusion in the Swedish multicenter project TIRA-2 [2], and with their significant others as defined by the persons with RA. Demographic data and the Valued Life Activity Scale (VLA-swe) [3] was reported by the persons with RA. To avoid bias, the persons with RA and their significant others were interviewed by different researches. Data from the interviews were transcribed verbatim and content analysis with a dyadic approach was undertaken [4]. The process of coding and categorizing was discussed between the researchers. The study was approved by the Regional Ethics Committee at Linköping University (Dnr. 2018/158-31), all participants gave their written consent.Results:Three women and two men with RA and five significant others, all represented by spouses, participated (N=10). The age of the persons with RA ranged from 34 to 67 years and a majority experienced difficulties in ≥ 12 valued life activities.Three categories were revealed:1) A strong willpower affecting the dyadic relationship, meaning that the understanding within the dyads was that the persons with RA were not so keen to share status, which was mentioned in connection to tenacity and expectations.2) Being a support to each other, referring to the mutual understanding within the couples that there was a constant exchange of support, forming a basis for participation in everyday life. However, disagreement was expressed concerning an unequal amount of support.3) The dyads’ potential issues with awareness, addressing the difficulty in fully comprehending the impact of the diagnosis. The couples mentioned an unwillingness from the person with RA to share information, and the significant other viewing comments as complaining. This type of miscommunication was interpreted as a potential negative effect on participation in everyday life.Conclusion:A constant exchange of support within the dyads was evident. However, the dyadic relationships were often affected by the willpower of the persons with RA to be independent in everyday life. In addition, the dyads faced the concern of fully understanding the diagnosis. The results indicate further needs for interventions for both the persons with RA as well as the significant others, in order to boost the dyadic interaction, and thereby facilitate optimal participation in everyday life of persons with RA.References:[1]Brignon M, Vioulac C, Boujut E et al. (2019) Patients and relatives coping with inflammatory arthritis: care teamwork. Health Expect 2019;00:1-11[2]Thyberg I, Dahlström Ö, Björk M, et al. (2017) Hand pains in women and men in early rheumatoid arthritis, a one year follow-up after diagnosis. The Swedish TIRA project. Disabil Rehabil 2017;39(3):291-300[3]Björk M, Thyberg M, Valtersson, E et al. (2016) Validation and internal consistency of the Swedish version of the Valued Life Activities scale. Clin Rehabil 2016;30(12):1211-1219[4]Eiskovits Z, Koren C (2010) Approaches to and outcomes of dyadic interview analysis. Qual Health Res 2010;20(12):1642-55Disclosure of Interests:None declared
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Bergström M, Håkansson A, Blücher A, Andersson HS. From carbohydrates to fat: Trends in food intake among Swedish nutrition students from 2002 to 2017. PLoS One 2020; 15:e0228200. [PMID: 31990946 PMCID: PMC6986719 DOI: 10.1371/journal.pone.0228200] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 01/09/2020] [Indexed: 01/22/2023] Open
Abstract
Earlier studies have implied a change in dietary habits of the Swedish population towards a low carbohydrate, high fat diet. Questions have been raised about the development in recent years and potential health effects. We have investigated the dietary intake of Swedish female students enrolled in a university nutrition course between 2002 and 2017. The students carried out self-reporting of all food and drink intake over one weekday and one weekend day. Intake of macronutrients (E%) and micronutrients were calculated for the whole period while statistical analysis was performed for changes between 2009 and 2017 (729 women). Results showed significant changes in carbohydrate intake (from 47.0 to 41.4 E%) and fat intake (from 31.7 to 37.5 E%). Carbohydrate intake was significantly lower than the Nordic Nutrition Recommendations (45–60 E%). However, daily fiber intake remains high (3.0 g/MJ) in a national context, and intake of vitamin D and folate appears to increase during the period. The results suggest that the observed national transition from carbohydrate to fat intake persists, and that it might be especially evident among individuals interested in food and nutrition. Considering the fiber and micronutrient intake, the change is not necessarily unfavorable for this particular group.
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Affiliation(s)
- Maria Bergström
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Andreas Håkansson
- Department of Food Technology, Engineering and Nutrition, Lund University, Lund, Sweden
| | - Anna Blücher
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
| | - Håkan S Andersson
- Department of Chemistry and Biomedical Sciences, Linnaeus University, Kalmar, Sweden
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, Solna, Sweden
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11
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Karlsson M, Norder H, Bergström M, Park PO, Karlsson M, Wejstål R, Alsiö Å, Rosemar A, Lagging M, Mellgren Å. Hepatitis E virus genotype 3 is associated with gallstone-related disease. Scand J Gastroenterol 2019; 54:1269-1273. [PMID: 31553628 DOI: 10.1080/00365521.2019.1666163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Objective: Hepatitis E virus (HEV) genotype 3 is endemic in Northern Europe and despite a high seroprevalence of anti-HEV IgG antibodies among blood donors (≈17%), few clinical cases are notified in Sweden. Low awareness of hepatitis E and its possible symptoms may contribute to this discrepancy. The aim of this study was to investigate the prevalence of acute HEV infection among hospital admitted patients with abdominal pain and elevated liver enzymes.Materials and methods: During 2016-2017, 148 adult patients with serum alanine aminotransferase (ALT) or aspartate aminotransferase (AST) > twice normal levels were prospectively enrolled at surgical wards at three Swedish hospitals. Serum samples were analyzed for HEV RNA as well as anti-HEV IgM and IgG, and medical records were reviewed.Results: Six (6/148, 4.1%) patients were HEV infected confirmed by detectable HEV RNA, but only one of these patients had detectable anti-HEV antibodies. Four of the HEV infected patients were diagnosed with gallstone-related disease: three with biliary pancreatitis and one with biliary colic. The remaining two were diagnosed with bowel obstruction and pancreatic malignancy. Four HEV strains were typed by sequencing to genotype 3.Conclusions: This study identified acute HEV3 infection in 4% of the patients with elevated liver enzymes admitted to a surgical ward. HEV infection was not the solitary disease leading to hospitalization, instead it was found to be associated with other surgical conditions such as gallstone-related disease including biliary pancreatitis. Additionally, HEV RNA might be the preferential diagnostic tool for detecting ongoing HEV infection.
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Affiliation(s)
- Miriam Karlsson
- Department of Infectious Diseases, Region Västra Götaland, South Älvsborg Hospital, Borås, Sweden.,Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Heléne Norder
- Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Clinical Microbiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Maria Bergström
- Department of Surgery, Region Västra Götaland, South Älvsborg Hospital, Borås, Sweden.,Department of Surgery, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Per-Ola Park
- Department of Surgery, Region Västra Götaland, South Älvsborg Hospital, Borås, Sweden.,Department of Surgery, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Marie Karlsson
- Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Rune Wejstål
- Department of Infectious Diseases, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Åsa Alsiö
- Department of Infectious Diseases, Region Västra Götaland, Skaraborg Hospital, Skövde, Sweden
| | - Anders Rosemar
- Department of Surgery, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Martin Lagging
- Department of Infectious Diseases/Virology, Institute of Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.,Department of Clinical Microbiology, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Åsa Mellgren
- Department of Infectious Diseases, Region Västra Götaland, South Älvsborg Hospital, Borås, Sweden.,Department of Infectious Diseases, Region Västra Götaland, Sahlgrenska University Hospital, Gothenburg, Sweden
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12
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Arroyo Vázquez JA, Henning C, Park PO, Bergström M. Bacterial colonization of the stomach and duodenum in a Swedish population with and without proton pump inhibitor treatment. JGH Open 2019; 4:405-409. [PMID: 32514445 PMCID: PMC7273737 DOI: 10.1002/jgh3.12265] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 08/30/2019] [Accepted: 09/04/2019] [Indexed: 12/22/2022]
Abstract
Background and Aim Microbial contamination of the abdominal cavity is a serious concern during transgastric endoscopic interventions and perforations, particularly in patients who have inhibited gastric acid secretion due to treatment with proton pump inhibitors (PPIs). The aim of this study was to investigate the gastric and duodenal bacterial flora in patients with and without PPI treatment. Methods Patients referred for gastroscopy, without recent antibiotic treatment, were eligible for inclusion. Use of PPIs was recorded. Samples for bacterial culturing were obtained from the antrum of the stomach and from the duodenal bulb through a gastroscope. Positive cultures were examined for bacterial types and subtypes. Biopsies were taken in the antrum for urease test to detect Helicobacter pylori. Results Bacterial cultures from the stomach were obtained from 103 patients, and duodenal samples were also cultured from 49 of them, for a total of 53 patients with PPI use and 50 patients without. Positive gastric cultures were found in 42 of 53 patients with PPI use and in 13 of 50 without (P < 0.0001). Duodenal cultures were positive in 20 of 24 with PPI and 8 of 25 without (P < 0.0001). The most commonly identified bacterial species were oral strains of Streptococcus, followed by Neisseria and Haemophilus influenzae. Of 103 patients, 10 had a positive urease test, indicating H. pylori infection, 1 with PPI and 9 without. Conclusions Bacterial growth in the stomach and duodenum is more common in patients with PPI treatment. The dominating bacterial species found in the stomach and duodenum originates from the oropharynx. Clinical trials registry: Trial registration number 98041 in Researchweb (FoU in Sweden).
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Affiliation(s)
- Jorge Alberto Arroyo Vázquez
- Department of Surgery South Älvsborg Hospital Borås Sweden.,University of Gothenburg, Sahlgrenska Academy Gothenburg Sweden
| | - Claes Henning
- University of Gothenburg, Sahlgrenska Academy Gothenburg Sweden.,Department of Microbiology South Älvsborg Hospital Borås Sweden
| | - Per-Ola Park
- Department of Surgery South Älvsborg Hospital Borås Sweden.,University of Gothenburg, Sahlgrenska Academy Gothenburg Sweden
| | - Maria Bergström
- Department of Surgery South Älvsborg Hospital Borås Sweden.,University of Gothenburg, Sahlgrenska Academy Gothenburg Sweden
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13
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Bergström M, Sverker A, Larsson Ranada Å, Valtersson E, Thyberg I, Östlund G, Björk M. Significant others' influence on participation in everyday life - the perspectives of persons with early diagnosed rheumatoid arthritis. Disabil Rehabil 2019; 42:385-393. [PMID: 30634863 DOI: 10.1080/09638288.2018.1499825] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Purpose: To describe the meaning of significant others in relation to participation in everyday life of persons with early diagnosed rheumatoid arthritis (RA).Materials and methods: Fifty-nine persons participated in this interview study. Inclusion criteria were three years' experience of diagnosis and being of working age. Semi-structured interviews were conducted using critical incident technique (CIT), and the material was analysed using content analysis.Results: Four categories were revealed: (1) My early RA causes activity adaptations for us all, referring to the person and significant others modifying activities. (2) Making the significant others balance between shortfalls and participation, where the participants distinguished between needing help and feeling involved in activities. (3) Physical interactions with significant others, referring to both the problematic and manageable impact RA could have on body contact. (4) Emotions in relation to activities with others, where participants described feelings of failing others, and anxiety about future activities.Conclusions: For persons with early diagnosed RA, significant others can be both hindering and facilitating for participation in everyday life. As a clinical implication, it is valuable to identify how significant others can be involved in the rehabilitation process, to enhance participation in everyday life early in the disease process.Implications for rehabilitationSignificant others of persons with rheumatoid arthritis can facilitate as well as hinder participation in everyday life, even early in the disease process.It is important to include the significant others in the rehabilitation process of persons with early diagnosed rheumatoid arthritis.It is of great importance to identify when and how significant others can be facilitators of participation in everyday life for persons with early rheumatoid arthritis.To make it easier for significant others to facilitate participation, there is a need for the healthcare system to explore ways to support significant others with easily accessible information about early rheumatoid arthritis.
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Affiliation(s)
- Maria Bergström
- Division of Occupational Therapy, Department of Social and Welfare Studies, Linköping University, Norrköping, Sweden
| | - Annette Sverker
- Department of Activity and Health, Department of Rehabilitation Medicine and Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Åsa Larsson Ranada
- Division of Occupational Therapy, Department of Social and Welfare Studies, Linköping University, Norrköping, Sweden
| | - Eva Valtersson
- Department of Activity and Health, Department of Rehabilitation Medicine and Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Ingrid Thyberg
- Department of Clinical and Experimental Medicine, Linköping University, Department of Rheumatology, Heart and Medicine Center, Region Östergötland, Linköping, Sweden
| | - Gunnel Östlund
- School of Health Care and Social Welfare, Mälardalen University, Eskilstuna, Sweden
| | - Mathilda Björk
- Division of Occupational Therapy, Department of Social and Welfare Studies, Faculty of Health Sciences, Linköping University, Department of Rheumatology, Heart and Medicine Center, Region Östergötland, Linköping, Sweden
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14
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Arroyo Vázquez JA, Bergström M, Bligh S, McMahon BP, Park PO. Exploring pyloric dynamics in stenting using a distensibility technique. Neurogastroenterol Motil 2018; 30:e13445. [PMID: 30109904 DOI: 10.1111/nmo.13445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 06/20/2018] [Accepted: 07/16/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Perforated duodenal ulcers can be treated with a covered stent. Stent migration is a severe complication, sometimes requiring surgery. Pyloric physiology during stent treatment has not been studied and mechanisms for migration are unknown. The aim of this study was to investigate the pyloric response to distention, mimicking stent treatment, using the EndoFLIP. METHODS A nonsurvival study in five pigs was carried out, followed by a pilot study in one volunteer. Animals were gastroscoped during anaesthesia and the EndoFLIP was placed straddling the pylorus. Baseline distensibility readings were performed at stepwise balloon distentions to 20, 30, 40, and 50 mL, measuring pyloric cross-sectional area and pressure. Measurements were repeated after administration of a prokinetic drug and after a liquid meal. In the human study, readings were performed in conscious sedation at baseline and after stimulation with metoclopramide. KEY RESULTS During baseline readings, the pylorus was shown to open more with increasing distention together with higher amplitude motility waves. Reaching maximum distention-volume (50 mL), pyloric pressure increased significantly (P = 0.016), and motility waves disappeared. After prokinetic stimulation, the pressure decreased and the motility waves increased in frequency and amplitude. After food stimulation, the pressure stayed low and the motility showed increase in amplitude. During both tests, the pylorus showed higher pressure and lack of motility waves at maximum probe distention. CONCLUSIONS AND INFERENCES The pylorus seems to act as a sphincter at low distention but when further dilated starts acting as a pump. Fully distended the pyloric motility disappears and the pressure remains high, suggesting that a stent with high-radial force might show less migration.
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Affiliation(s)
| | - Maria Bergström
- Department of Surgery, South Älvsborg Hospital, Borås, Sweden.,Gothenburg University, Gothenburg, Sweden
| | - Stephen Bligh
- Department of Medical Physics & Clinical Engineering, Tallaght Hospital and TAGG Research Centre, School of Medicine, Trinity College, Dublin, Ireland
| | - Barry P McMahon
- Department of Medical Physics & Clinical Engineering, Tallaght Hospital and TAGG Research Centre, School of Medicine, Trinity College, Dublin, Ireland
| | - Per-Ola Park
- Department of Surgery, South Älvsborg Hospital, Borås, Sweden.,Gothenburg University, Gothenburg, Sweden
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15
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Constantin-Teodosiu D, Cederblad G, Bergström M, Greenhaff PL. Maximal-intensity exercise does not fully restore muscle pyruvate dehydrogenase complex activation after 3 days of high-fat dietary intake. Clin Nutr 2018; 38:948-953. [PMID: 29459213 DOI: 10.1016/j.clnu.2018.02.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 01/31/2018] [Accepted: 02/02/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND & AIMS Exercise activates muscle pyruvate dehydrogenase complex (PDC), but moderate intensity exercise fails to fully activate muscle PDC after high-fat diet [1]. We investigated whether maximal intensity exercise overcomes this inhibition. METHODS Quadriceps femoris muscle biopsy samples were obtained from healthy males at rest, and after 46 and 92 electrically-evoked maximal intermittent isometric contractions, which were preceded by 3 days of either low- (18%) or high- (69%) isocaloric dietary fat intake (LFD and HFD, respectively). RESULTS The ratio of PDCa (active form) to total PDCt (fully activated) at rest was 50% less after HFD (0.32 ± 0.01 vs 0.15 ± 0.01; P < 0.05). This ratio increased to 0.77 ± 0.06 after 46 contractions (P < 0.001) and to 0.98 ± 0.07 after 92 contractions (P < 0.001) in LFD. The corresponding values after HFD were less (0.54 ± 0.06; P < 0.01 and 0.70 ± 0.07; P < 0.01, respectively). Resting muscle acetyl-CoA and acetylcarnitine content was greater after HFD than LFD (both P < 0.05), but their rate of accumulation in the former was reduced during contraction. Muscle lactate content after 92 contractions was 30% greater after HFD (P < 0.05). Muscle force generation during contraction was no different between interventions, but HFD lengthened muscle relaxation time (P < 0.05). Daily urinary total carnitine excretion after HFD was 2.5-fold greater than after LFD (P < 0.01). CONCLUSIONS A bout of maximal intense exercise did not overcome dietary fat-mediated inhibition of muscle pyruvate dehydrogenase complex activation, and was associated with greater muscle lactate accumulation, as a result of lower PDC flux, and increased muscle relaxation time.
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Affiliation(s)
- D Constantin-Teodosiu
- MRC/ARUK Centre for Musculoskeletal Ageing Research, ARUK Centre for Sport, Exercise and Osteoarthritis, NIHR Nottingham BRC, School of Life Sciences, The Medical School, University of Nottingham, Queen's Medical Centre, Nottingham NG7 2UH, UK.
| | - G Cederblad
- Clinical Chemistry, Karolinska University Hospital, S-141 86 Huddinge, Sweden
| | - M Bergström
- Clinical Chemistry, Karolinska University Hospital, S-141 86 Huddinge, Sweden
| | - P L Greenhaff
- MRC/ARUK Centre for Musculoskeletal Ageing Research, ARUK Centre for Sport, Exercise and Osteoarthritis, NIHR Nottingham BRC, School of Life Sciences, The Medical School, University of Nottingham, Queen's Medical Centre, Nottingham NG7 2UH, UK
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16
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Affiliation(s)
- Maria Bergström
- Department of Chemistry and Biomedical Sciences; Linnaeus University; 39182 Kalmar Sweden
| | - Ganji Suresh
- Department of Chemistry and Biomedical Sciences; Linnaeus University; 39182 Kalmar Sweden
| | - Veluru Ramesh Naidu
- Department of Chemistry and Biomedical Sciences; Linnaeus University; 39182 Kalmar Sweden
| | - C. Rikard Unelius
- Department of Chemistry and Biomedical Sciences; Linnaeus University; 39182 Kalmar Sweden
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17
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Toth E, Marthinsen L, Bergström M, Park PO, Månsson P, Nemeth A, Johansson GW, Thorlacius H. Colonic obstruction caused by video capsule entrapment in a metal stent. Ann Transl Med 2017; 5:199. [PMID: 28567379 DOI: 10.21037/atm.2017.03.79] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Video capsule endoscopy (VCE) has become the method of choice for visualizing the small bowel mucosa and is generally considered to be a safe method. Although uncommon, the most feared complication of VCE is capsule retention that can potentially lead to life-threatening bowel obstruction. Herein, we present for the first time a case of capsule retention in a colonic stent. The patient had known Crohn's disease with colonic involvement and underwent an uneventful but incomplete small bowel VCE for assessment of disease activity and extension for optimizing medical treatment. Five months later, the patient presented with intestinal obstruction due to a Crohn's-stricture in the sigmoid colon, which was successfully decompressed with a self-expandable metal stent. Nonetheless, two days later the patient showed signs of bowel obstruction again and abdominal X-ray showed that the capsule was trapped in the metal stent in the sigmoid colon. Subsequently, emergency surgery was performed and the patient fully recovered. Intestinal capsule retention necessitating interventional removal is rare. This report describes a unique case of capsule retention in a colonic metal stent and highlights the potential risk of performing capsule endoscopy examinations in patients with gastrointestinal stents.
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Affiliation(s)
- Ervin Toth
- Department of Gastroenterology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden
| | - Lars Marthinsen
- Department of Pediatrics, Halmstad Hospital, 30185 Halmstad, Sweden
| | - Maria Bergström
- Department of Surgery, South Älvsborg Hospital, 50182 Borås, Sweden
| | - Per-Ola Park
- Department of Surgery, South Älvsborg Hospital, 50182 Borås, Sweden
| | - Peter Månsson
- Department of Surgery, Halmstad Hospital, 30185 Halmstad, Sweden
| | - Artur Nemeth
- Department of Gastroenterology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden
| | - Gabriele Wurm Johansson
- Department of Gastroenterology, Skåne University Hospital, Lund University, 20502 Malmö, Sweden
| | - Henrik Thorlacius
- Department of Surgery, Skåne University Hospital, Lund University, 20502 Malmö, Sweden
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18
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Bergström M, Ahlstrand I, Thyberg I, Falkmer T, Börsbo B, Björk M. 'Like the worst toothache you've had' - How people with rheumatoid arthritis describe and manage pain. Scand J Occup Ther 2017; 24:468-476. [PMID: 28052711 DOI: 10.1080/11038128.2016.1272632] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Rheumatoid arthritis (RA) is a chronic inflammatory disease often associated with disability. Despite new treatments, pain and activity limitations are still present. OBJECTIVES To describe how persons with RA experience and manage pain in their daily life. METHODS Seven semi-structured focus groups (FGs) were conducted and analyzed using content analysis. RESULTS The analysis revealed four categories: 1) Pain expresses itself in different ways referred to pain as overwhelming, aching or as a feeling of stiffness. 2) Mitigating pain referred to the use of heat, cold, medications and activities as distractions from the pain. 3) Adapting to pain referred to strategies employed as coping mechanisms for the pain, e.g. planning and adjustment of daily activities, and use of assistive devices. 4) Pain in a social context referred to the participants' social environment as being both supportive and uncomprehending, the latter causing patients to hide their pain. CONCLUSIONS Pain in RA is experienced in different ways. This emphasizes the multi-professional team to address this spectrum of experiences and to find pain management directed to the individual experience that also include the person's social environment.
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Affiliation(s)
- Maria Bergström
- a Department of Social and Welfare Studies , Linköping University , Norrköping , Sweden
| | - Inger Ahlstrand
- b Department of Rehabilitation , School of Health and Welfare, Jönköping University , Jönköping , Sweden
| | - Ingrid Thyberg
- c Department of Rheumatology , Linköping University , Linköping , Sweden.,d Department of Clinical and Experimental Medicine , Linköping University , Linköping , Sweden
| | - Torbjörn Falkmer
- b Department of Rehabilitation , School of Health and Welfare, Jönköping University , Jönköping , Sweden.,e School of Occupational Therapy & Social Work , CHIRI, Curtin University , Perth , WA , Australia.,f Department of Medical and Health Sciences , Linköping University , Linköping , Sweden
| | - Björn Börsbo
- g Division of Community Medicine, Department of Medical and Health Sciences, Faculty of Health Sciences , Linköping University, Pain and Rehabilitation Center, Anesthetics, Operations and Specialty Surgery Center, County Council of Östergötland , Linköping , Sweden
| | - Mathilda Björk
- a Department of Social and Welfare Studies , Linköping University , Norrköping , Sweden.,c Department of Rheumatology , Linköping University , Linköping , Sweden
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Mosskin M, von Holst H, Bergström M, Collins VP, Eriksson L, Johnström P, Norén G. Positron Emission Tomography with 11C-Methionine and Computed Tomography of Intracranial Tumours Compared with Histopathologic Examination of Multiple Biopsies. Acta Radiol 2016. [DOI: 10.1177/028418518702800604] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A selected group of 36 patients with suspected supratentorial gliomas were investigated with positron emission tomography (PET) using 11C-methionine and transmission computed tomography (CT) before and after intravenous injection of contrast medium. Every examination was performed with the head fixed in a plastic helmet and a baseplate to guarantee that the slice orientation was the same at examinations with the two modalities and over time. Guided by the examinations, multiple stereotactic biopsies were performed with the biopsy instrument mounted on the baseplate. Regional accumulation of methionine was compared with histology of the corresponding samples and with attenuation before and after injection of contrast medium as well as mass effect on CT. Typically, there was a low attenuating lesion with a slight mass effect on CT. There was an increased accumulation compared with normal brain tissue in 31 cases of tumours and ordinary or decreased accumulation in 3 cases of tumours. In 22 cases with increased accumulation of methionine the extension of the tumour judged by PET corresponded with that of histology. In 4 cases tumour cells were found outside the area with pathologic methionine uptake. In 5 patients there were areas with increased methionine accumulation where no tumour cells were found. In 22 cases PET using methionine was more accurate than CT in defining the tumour boundaries as determined from the histologic findings. Four groups of biopsy specimens with different amounts of methionine accumulation are described. The uptake in a single biopsy gives good but not exact information about the histology of the specimen.
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20
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Bergström M, Lundqvist H, Ericson K, Lilja A, Johnström P, Långström B, von Holst H, Eriksson L, Blomqvist G. Comparison of the Accumulation Kinetics of L-(Methyl- 11C)-Methionine and D-(Methyl- 11C)-Methionine in Brain Tumors Studied with Positron Emission Tomography. Acta Radiol 2016. [DOI: 10.1177/028418518702800301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Five patients with glioma were examined with positron emission tomography after the administration of 11C-L-methionine and at a following day with 11C-D-methionine. The rates of accumulation of the tracers were determined in the tumor and in the normal brain tissue according to a graphical technique of Patlak et coll. (24). The accumulation rates for L-methionine were on the average 2.4 times higher than those of D-methionine in the tumors. The corresponding ratio for normal brain tissue was 2.3. It is concluded that in this group of tumors without obvious blood-tumor-barrier breakdown, a stereospecific process with similar properties as in the normal brain tissue, is responsible for the accumulation of the labelled methionine.
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Affiliation(s)
- M. Bergström
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - H. Lundqvist
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - K. Ericson
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - A. Lilja
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - P. Johnström
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - B. Långström
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - H. von Holst
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - L. Eriksson
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
| | - G. Blomqvist
- From the Departments of Neuroradiology, Neurophysiology, Neurosurgery, Radiation physics and Karolinska Pharmacy, Karolinska Sjukhuset, Stockholm, and the Departments of Diagnostic Radiology, Physical Biology, Gustaf Werner Institute, Uppsala, and the Department of Organic Chemistry, Uppsala University, Uppsala, Sweden
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21
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Mosskin M, Ericson K, Hindmarsh T, von Holst H, Collins VP, Bergström M, Eriksson L, Johnström P. Positron Emission Tomography Compared with Magnetic Resonance Imaging and Computed Tomography in Supratentorial Gliomas Using Multiple Stereotactic Biopsies as Reference. Acta Radiol 2016. [DOI: 10.1177/028418518903000301] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Ten patients with findings at computed tomography (CT) suggesting intracranial supratentorial glioma were investigated to compare the diagnostic efficacy of this technique with that of positron emission tomography (PET) using 11C-methionine and exminations with magnetic resonance (MR). The findings were related to histopathologic examination of serial stereotactic biopsies, which were guided by the appearance of the lesions on PET examination. To obtain corresponding slice orientation with the different examination techniques, an individually shaped helmet fixation was used. However, in 3 cases this fixation device could not be used for MR. Histopathologic diagnosis, obtained in all cases from multiple target stereotactic biopsies, included glioma in 9 patients and reactive gliosis in one case. A detailed comparison of the three imaging techniques and the findings at stereotactic biopsies was possible in 7 patients, while in 3 patients comparison with MR was less exact due to the patient's refusal to wear the helmet during this examination. MR was the most accurate method for outlining the total extent of a lesion, i.e. the tumor and the edema surrounding it. Four lesions had homogeneous signal characteristics and in 6 lesions two (or more) compartments could be distinguished with MR. In 5 cases the MR findings were in complete agreement with the histopathologic findings. However, a thorough correlation between signal characteristics and histology was not possible. Using PET the occurrence and the extent of tumor tissue was correctly predicted in 7 patients. The PET was normal in one case. Findings at CT were in agreement with the histopathologic diagnosis in 5 patients. MR was the most sensitive method for the detection of lesions. PET using methionine appeared to have a somewhat higher capacity to outline correctly the true extent of a tumor. The combination of CT and PET was superior to MR for determining the type and grade of the tumors.
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Affiliation(s)
- M. Mosskin
- From the Departments of Neuroradiology, Diagnostic Radiology, Neurosurgery, Clinical Neurophysiology and Tumor Pathology, Karolinska Sjukhuset, and Karolinska Apoteket, S-10401 Stockholm, Sweden
| | - K. Ericson
- From the Departments of Neuroradiology, Diagnostic Radiology, Neurosurgery, Clinical Neurophysiology and Tumor Pathology, Karolinska Sjukhuset, and Karolinska Apoteket, S-10401 Stockholm, Sweden
| | - T. Hindmarsh
- From the Departments of Neuroradiology, Diagnostic Radiology, Neurosurgery, Clinical Neurophysiology and Tumor Pathology, Karolinska Sjukhuset, and Karolinska Apoteket, S-10401 Stockholm, Sweden
| | - H. von Holst
- From the Departments of Neuroradiology, Diagnostic Radiology, Neurosurgery, Clinical Neurophysiology and Tumor Pathology, Karolinska Sjukhuset, and Karolinska Apoteket, S-10401 Stockholm, Sweden
| | - V. P. Collins
- From the Departments of Neuroradiology, Diagnostic Radiology, Neurosurgery, Clinical Neurophysiology and Tumor Pathology, Karolinska Sjukhuset, and Karolinska Apoteket, S-10401 Stockholm, Sweden
| | - M. Bergström
- From the Departments of Neuroradiology, Diagnostic Radiology, Neurosurgery, Clinical Neurophysiology and Tumor Pathology, Karolinska Sjukhuset, and Karolinska Apoteket, S-10401 Stockholm, Sweden
| | - L. Eriksson
- From the Departments of Neuroradiology, Diagnostic Radiology, Neurosurgery, Clinical Neurophysiology and Tumor Pathology, Karolinska Sjukhuset, and Karolinska Apoteket, S-10401 Stockholm, Sweden
| | - P. Johnström
- From the Departments of Neuroradiology, Diagnostic Radiology, Neurosurgery, Clinical Neurophysiology and Tumor Pathology, Karolinska Sjukhuset, and Karolinska Apoteket, S-10401 Stockholm, Sweden
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Tovi M, Lilja A, Bergström M, Ericsson A, Bergström K, Hartman M. Delineation of Gliomas with Magnetic Resonance Imaging Using Gd-DTPA in Comparison with Computed Tomography and Positron Emission Tomography. Acta Radiol 2016. [DOI: 10.1177/028418519003100501] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Fourteen patients with cerebral gliomas were investigated by MR imaging using Gd-DTPA (Magnevist), CT with the contrast agent iohexol (Omnipaque) and, as a reference, positron emission tomography (PET) using 11C-L-methionine. Tumour areas with disruption of the blood-brain-barrier (BBB) as seen on MR and CT were compared with areas with increased accumulation of methionine in PET. There were 6 patients with high-grade astrocytoma (grade III-IV), 5 with low-grade astrocytoma (grade I–II) and 3 with oligodendroglioma. In 4 high-grade tumours, PET showed a larger tumour or tumour tissue in additional areas, compared with enhancement on MR and CT, while in 2 cases the tumour extension was similar in the three modalities. In the low grade tumour group, the findings on PET differed from those on post-contrast MR or CT in 7 cases. In 3 of these cases, no disruption of the BBB was seen either on MR or on CT. In 2 of our 14 patients CT showed larger enhancement extension than MR and in 2 cases MR was superior to CT in this respect. The enhancement intensity was higher on MR in 4 patients and on CT in 2 patients. No definite difference in the delineation of tumour tissue between the T1 weighted SE sequences used was found. The gradient echo sequences FLASH and FISP gave limited information that was less than that provided by the T1 weighted SE sequences. A greater increase in signal intensity in T1 weighted images was usually seen 5 min post-contrast in the high-grade tumours than in the low-grade ones.
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Ericson K, Blomqvist G, Bergström M, Eriksson L, Stone-Elander S. Application of a Kinetic Model on the Methionine Accumulation in Intracranial Tumours Studied with Positron Emission Tomography. Acta Radiol 2016. [DOI: 10.1177/028418518702800502] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Eleven patients were studied with positron emission tomography (PET) using 11C-methionine. They all had low-grade astrocytomas (Kernohan grade II). The PET studies were analyzed with a metabolic model to obtain values for the influx, the accumulation rate and the partition coefficient of methionine in normal and tumourous tissue. Seven of the tumours showed an increased accumulation of methionine as compared with normal tissue on the static PET scans and also had higher values as to the kinetic parameters. Four tumours had a methionine accumulation equal to or lower than that of normal tissue and the kinetic parameters were also lower. Application of the kinetic model did not aid significantly in the delineation of the tumours. There was a correlation between the three parameters indicating an adaption of the transport of methionine to the regional metabolic demand. The accumulation rate for normal cortical tissue was 0.49 nmol/g/min, the influx 0.97 nmol/ml and the partition coefficient 0.45 ml/g. These values are considerably higher than those previously reported. The differences might be attributed to differences in the corrections introduced for i.a. the occurrence of labelled metabolites in serum. With the use of a kinetic model, more information about the tracer is utilized and gained compared with the previously used graphic approach.
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Arroyo Vázquez J, Bergström M, Dot J, Abu-Suboh-Abadia M, Fonseca C, Esteves M, Azadani A, Armengol J, Masachs M, Armengol-Miró JR, Park PO. Surgical Trauma Caused by Different Abdominal Access Routes-Comparison of Open Surgical, Laparoscopic, and NOTES Transgastric Techniques in a Porcine Model. J Laparoendosc Adv Surg Tech A 2016; 26:511-6. [PMID: 27163486 DOI: 10.1089/lap.2016.0034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND Investigations indicate that natural orifice translumenal endoscopic surgery (NOTES) procedures induce a less pronounced postoperative inflammatory response than open or laparoscopic surgery, inflicting less trauma. In NOTES procedures, no skin incision is performed. We compare the inflammatory response added by the type of incision by measuring C-reactive protein (CRP) and tumors necrosis factor-alfa (TNF-α). METHODS Twenty-seven pigs were randomized to open surgical, laparoscopic, or transgastric NOTES abdominal access. After completion of the accesses, no surgery was performed. All accesses were left open for 40 minutes followed by closure, animals were survived for 7 days. Blood samples were drawn at the start of the accesses, at 20 and 40 minutes during the procedure, and at postoperative day (POD) 1, 3, and 7. Analyses of CRP and TNF-α were performed. RESULTS CRP increased in all animals until POD1. This increase was greater in the open group (P = .006). No significant differences in CRP-levels were found at POD 1, 3, or 7. TNF-α showed a peak during the procedure, at 20 and 40 minutes, with normalization at POD1 for 1/3 of the open and laparoscopic animals, but not for the NOTES animals. Due to variations within the groups, no statistical difference was shown between them. At postmortem, 1/3 of the pigs in the laparoscopic and open groups had wound infections, while no NOTES animals showed infections. CONCLUSIONS This study provides no statistically significant differences in inflammatory response after the different abdominal accesses. However, the lack of a TNF-α-peak in the NOTES group might indicate a less pronounced response, supporting the initial theories.
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Affiliation(s)
| | - Maria Bergström
- 1 Department of Surgery, South Älvsborg Hospital , Borås, Sweden .,2 Sahlgrenska Academy, Gothenburg University , Gothenburg, Sweden
| | - Joan Dot
- 3 Hospital Universitario Vall d'Hebron , Wider-Barcelona, Barcelona, Spain
| | | | - Carla Fonseca
- 3 Hospital Universitario Vall d'Hebron , Wider-Barcelona, Barcelona, Spain .,4 Vall d'Hebron Institut de Recerca, VHIR, Universitat Autònoma de Barcelona , Barcelona, Spain
| | - Marielle Esteves
- 3 Hospital Universitario Vall d'Hebron , Wider-Barcelona, Barcelona, Spain .,4 Vall d'Hebron Institut de Recerca, VHIR, Universitat Autònoma de Barcelona , Barcelona, Spain
| | - Asghar Azadani
- 2 Sahlgrenska Academy, Gothenburg University , Gothenburg, Sweden
| | - Jordi Armengol
- 3 Hospital Universitario Vall d'Hebron , Wider-Barcelona, Barcelona, Spain
| | - Miquel Masachs
- 3 Hospital Universitario Vall d'Hebron , Wider-Barcelona, Barcelona, Spain
| | - José Ramon Armengol-Miró
- 3 Hospital Universitario Vall d'Hebron , Wider-Barcelona, Barcelona, Spain .,4 Vall d'Hebron Institut de Recerca, VHIR, Universitat Autònoma de Barcelona , Barcelona, Spain
| | - Per-Ola Park
- 1 Department of Surgery, South Älvsborg Hospital , Borås, Sweden .,2 Sahlgrenska Academy, Gothenburg University , Gothenburg, Sweden
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Abstract
Objective To investigate the effects of maternal and paternal depression on the risk for preterm birth. Design National cohort study. Setting Medical Birth Register of Sweden, 2007–2012. Population A total of 366 499 singleton births with linked information for parents’ filled drug prescriptions and hospital care. Methods Prenatal depression was defined as having filled a prescription for an antidepressant drug or having been in outpatient or inpatient hospital care with a diagnosis of depression from 12 months before conception until 24 weeks after conception. An indication of depression after 12 months with no depression was defined as ‘new depression’, whereas all other cases were defined as ‘recurrent depression’. Main outcome measures Odds ratios (ORs) for very preterm (22–31 weeks of gestation) and moderately preterm (32–36 weeks of gestation) births were estimated using multinomial logistic regression models. Results After adjustment for maternal depression and sociodemographic covariates, new paternal prenatal depression was associated with very preterm birth [adjusted OR (aOR) 1.38, 95% confidence interval (95% CI) 1.04–1.83], whereas recurrent paternal depression was not associated with an increased risk of preterm birth. Both new and recurrent maternal prenatal depression were associated with an increased risk of moderately preterm birth (aOR 1.34, 95% CI 1.22–1.46, and aOR 1.42, 95% CI 1.32–1.53, respectively). Conclusions New paternal and maternal prenatal depression are potential risk factors for preterm birth. Mental health problems in both parents should be addressed for the prevention of preterm birth. Tweetable abstract Depression in both mothers and fathers is associated with an increased risk of preterm birth. Depression in both mothers and fathers is associated with an increased risk of preterm birth.
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Affiliation(s)
- C Liu
- Centre for Health Equity Studies (CHESS), Karolinska Institutet/Stockholm University, Stockholm, Sweden.,Department of Medicine, Clinical Epidemiology Unit, Solna, Karolinska Institutet, Stockholm, Sweden
| | - S Cnattingius
- Department of Medicine, Clinical Epidemiology Unit, Solna, Karolinska Institutet, Stockholm, Sweden
| | - M Bergström
- Centre for Health Equity Studies (CHESS), Karolinska Institutet/Stockholm University, Stockholm, Sweden
| | - V Östberg
- Centre for Health Equity Studies (CHESS), Karolinska Institutet/Stockholm University, Stockholm, Sweden
| | - A Hjern
- Centre for Health Equity Studies (CHESS), Karolinska Institutet/Stockholm University, Stockholm, Sweden. .,Department of Medicine, Clinical Epidemiology Unit, Solna, Karolinska Institutet, Stockholm, Sweden.
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Duong-Thi MD, Bergström M, Edwards K, Eriksson J, Ohlson S, To Yiu Ying J, Torres J, Agmo Hernández V. Lipodisks integrated with weak affinity chromatography enable fragment screening of integral membrane proteins. Analyst 2016; 141:981-8. [DOI: 10.1039/c5an02105g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Membrane proteins constitute the largest class of drug targets but they present many challenges in drug discovery.
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Affiliation(s)
- Minh-Dao Duong-Thi
- Linnaeus University
- Department of Chemistry and Biomedical Sciences
- SE-39182 Kalmar
- Sweden
| | - Maria Bergström
- Linnaeus University
- Department of Chemistry and Biomedical Sciences
- SE-39182 Kalmar
- Sweden
| | - Katarina Edwards
- Uppsala University
- Department of Chemistry-BMC
- SE-75123 Uppsala
- Sweden
| | - Jonny Eriksson
- Uppsala University
- Department of Chemistry-BMC
- SE-75123 Uppsala
- Sweden
| | - Sten Ohlson
- Nanyang Technological University
- School of Biological Sciences
- Singapore 637551
- Republic of Singapore
| | - Janet To Yiu Ying
- Nanyang Technological University
- School of Biological Sciences
- Singapore 637551
- Republic of Singapore
| | - Jaume Torres
- Nanyang Technological University
- School of Biological Sciences
- Singapore 637551
- Republic of Singapore
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Bergström M, Arroyo Vázquez J, Nsouli G, Park PO. [Good results of stent treatment in perforated duodenal ulcer]. Lakartidningen 2015; 112:DLFY. [PMID: 26418934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Despite modern treatment of ulcer disease perforations still occur and constitute a life threatening complication. Standard treatment is surgical closure. We have introduced stent treatment as a minimal invasive alternative, mainly in elderly and co-morbid patients. During a 4-year period (2009-2012) ten patients with perforated duodenal ulcer were treated with a covered duodenal stent at South Älvsborg Hospital. These patients were retrospectively compared with all patients (n = 19) treated with surgical closure at the same hospital during the same time period. Stent treatment shows good clinical results indicating fewer complications than surgical treatment even if the patients had a slightly higher ASA score. In this series stent treatment is shown to be a safe and effective alternative for treating perforated duodenal ulcers, even in old and co-morbid patients.
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Affiliation(s)
- Maria Bergström
- Södra Älvsborgs Sjukhus - Kirurgkliniken Borås, Sweden South Alvsborg Hospital - Dept of Surgery Borås, Sweden
| | - Jorge Arroyo Vázquez
- Södra Älvsborgs Sjukhus - Kirurgkliniken Borås, Sweden Södra Älvsborgs Sjukhus - Kirurgkliniken Borås, Sweden
| | - Gina Nsouli
- Södra Älvsborgs Sjukhus - Kirurgkliniken Borås, Sweden Södra Älvsborgs Sjukhus - Kirurgkliniken Borås, Sweden
| | - Per-Ola Park
- Södra Älvsborgs Sjukhus - Kirurgkliniken Borås, Sweden Södra Älvsborgs Sjukhus - Kirurgkliniken Borås, Sweden
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Bergström M, Joly AL, Seiron P, Isringhausen S, Modig E, Fellström B, Andersson J, Berglund D. Immunological profiling of haemodialysis patients and young healthy individuals with implications for clinical regulatory T cell sorting. Scand J Immunol 2015; 81:318-24. [PMID: 25737071 DOI: 10.1111/sji.12287] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 02/24/2015] [Indexed: 01/04/2023]
Abstract
With the increasing interest in clinical trials with regulatory T cells (Tregs), immunological profiling of prospective target groups and standardized procedures for Treg isolation are needed. In this study, flow cytometry was used to assess peripheral blood lymphocyte profiles of young healthy individuals and patients undergoing haemodialysis treatment. Tregs obtained from the former may be used in haematopoietic stem cell transplantation and Tregs from the latter in the prevention of kidney transplant rejection. FOXP3 mRNA expression with accompanying isoform distribution was also assessed by the quantitative reverse transcriptase polymerase chain reaction. Flow-cytometric gating strategies were systematically analysed to optimize the isolation of Tregs. Our findings showed an overall similar immunological profile of both cohorts in spite of great differences in both age and health. Analysis of flow-cytometric gating techniques highlighted the importance of gating for both CD25high and CD127low expression in the isolation of FOXP3-positive cells. This study provides additional insight into the immunological profile of young healthy individuals and uraemic patients as well as in-depth analysis of flow-cytometric gating strategies for Treg isolation, supporting the development of Treg therapy using cells from healthy donors and uraemic patients.
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Affiliation(s)
- M Bergström
- Department of Immunology, Genetics and Pathology, Section of Clinical Immunology, Uppsala University, Uppsala, Sweden
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Norberg P, Bergström M, Hermansson M. Complete nucleotide sequence and analysis of two conjugative broad host range plasmids from a marine microbial biofilm. PLoS One 2014; 9:e92321. [PMID: 24647540 PMCID: PMC3960245 DOI: 10.1371/journal.pone.0092321] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 02/20/2014] [Indexed: 11/26/2022] Open
Abstract
The complete nucleotide sequence of plasmids pMCBF1 and pMCBF6 was determined and analyzed. pMCBF1 and pMCBF6 form a novel clade within the IncP-1 plasmid family designated IncP-1 ς. The plasmids were exogenously isolated earlier from a marine biofilm. pMCBF1 (62 689 base pairs; bp) and pMCBF6 (66 729 bp) have identical backbones, but differ in their mercury resistance transposons. pMCBF1 carries Tn5053 and pMCBF6 carries Tn5058. Both are flanked by 5 bp direct repeats, typical of replicative transposition. Both insertions are in the vicinity of a resolvase gene in the backbone, supporting the idea that both transposons are “res-site hunters” that preferably insert close to and use external resolvase functions. The similarity of the backbones indicates recent insertion of the two transposons and the ongoing dynamics of plasmid evolution in marine biofilms. Both plasmids also carry the insertion sequence ISPst1, albeit without flanking repeats. ISPs1is located in an unusual site within the control region of the plasmid. In contrast to most known IncP-1 plasmids the pMCBF1/pMCBF6 backbone has no insert between the replication initiation gene (trfA) and the vegetative replication origin (oriV). One pMCBF1/pMCBF6 block of about 2.5 kilo bases (kb) has no similarity with known sequences in the databases. Furthermore, insertion of three genes with similarity to the multidrug efflux pump operon mexEF and a gene from the NodT family of the tripartite multi-drug resistance-nodulation-division (RND) system in Pseudomonas aeruginosa was found. They do not seem to confer antibiotic resistance to the hosts of pMCBF1/pMCBF6, but the presence of RND on promiscuous plasmids may have serious implications for the spread of antibiotic multi-resistance.
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Affiliation(s)
- Peter Norberg
- Department of Infectious Diseases, University of Gothenburg, Göteborg, Sweden
| | - Maria Bergström
- Department of Chemistry and Molecular Biology, Microbiology, University of Gothenburg, Göteborg, Sweden
| | - Malte Hermansson
- Department of Chemistry and Molecular Biology, Microbiology, University of Gothenburg, Göteborg, Sweden
- * E-mail:
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Bergström M, Azadani A, Falk P, Park PO. Stress response and well-being after open, laparoscopic, and NOTES transgastric uterine horn resection in a randomized porcine model. Surg Endosc 2014; 28:2421-7. [DOI: 10.1007/s00464-014-3491-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 02/14/2014] [Indexed: 01/26/2023]
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Abstract
Primary stenting and drainage has been shown to be an effective and safe way to treat esophageal perforations and anastomotic leaks after gastric bypass surgery. We present a case series of eight patients with perforated duodenal ulcers treated with covered self-expandable metal stents (SEMS). The first two patients received their stents because of postoperative leakage after initial traditional surgical closure. The following six patients had SEMS placed as primary treatment due to co-morbidities or technical surgical difficulties. Endoscopy and stent treatment in these six patients was performed at a median of 3 days (range, 0 - 7 days) after initial symptoms. Six patients had percutaneous abdominal drainage. Early oral intake, 0 - 7 days after stent placement, was possible. All patients except one recovered without complications and were discharged 9 - 36 days after stent placement. This series indicates that primary treatment with SEMS and drainage might be an alternative to surgery in patients with perforated ulcer disease.
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Affiliation(s)
- M Bergström
- Department of Surgery, South Älvsborg Hospital, 501 82 Borås, Sweden.
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Falk P, Angenete E, Bergström M, Ivarsson ML. TGF-β1 promotes transition of mesothelial cells into fibroblast phenotype in response to peritoneal injury in a cell culture model. Int J Surg 2013; 11:977-82. [PMID: 23796443 DOI: 10.1016/j.ijsu.2013.06.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 06/06/2013] [Indexed: 01/24/2023]
Abstract
BACKGROUND Peritoneal adhesions are a clinical problem. A key to the understanding of peritoneal adhesions is to study the healing of mesothelial cells within the peritoneal cavity following surgery. Transforming growth factor beta (TGF-βs) affects this healing process. The aim of this study was to investigate the effects of different concentrations of TGF-β1 on the healing rate and healing properties of mesothelial cells. MATERIALS AND METHODS Human mesothelial cells from peritoneal fluid were collected, cultured and a mechanical wound was created. The restoration of the mesothelial surface with and without increasing concentrations of TGF-β1 was monitored. RESULTS The denuded area was restored within 24 h. The healing rate was most extensive between the first and second hour after the damage (61.9 ± 22.8 μm/h). No significant difference in healing rate were observed when increasing levels of TGF-β1 were used. However, higher concentrations of TGF-β1 increased cell size and the cells presented more fibroblast specific properties. Lower TGF-β1 concentrations increased the number of proliferating cells. CONCLUSIONS This study indicates the importance of high levels TGF-β1 in mesothelial cell healing, mainly by changing the actual healing properties of the cells. Elevated levels of TGF-β1 might promote mesothelial cell transition towards a more fibroblast-like appearance.
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Affiliation(s)
- Peter Falk
- Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy at University of Gothenburg, Fibrinolysis laboratory/Tissue Centre, Sahlgrenska University Hospital/Östra, SE-416 85 Göteborg, Sweden
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Duong-Thi MD, Bergström M, Fex T, Svensson S, Ohlson S, Isaksson R. Weak Affinity Chromatography for Evaluation of Stereoisomers in Early Drug Discovery. ACTA ACUST UNITED AC 2013; 18:748-55. [DOI: 10.1177/1087057113480391] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In early drug discovery (e.g., in fragment screening), recognition of stereoisomeric structures is valuable and guides medicinal chemists to focus only on useful configurations. In this work, we concurrently screened mixtures of stereoisomers and estimated their affinities to a protein target (thrombin) using weak affinity chromatography–mass spectrometry (WAC-MS). Affinity determinations by WAC showed that minor changes in stereoisomeric configuration could have a major impact on affinity. The ability of WAC-MS to provide instant information about stereoselectivity and binding affinities directly from analyte mixtures is a great advantage in fragment library screening and drug lead development.
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Affiliation(s)
| | - Maria Bergström
- School of Natural Sciences, Linnaeus University, Kalmar, Sweden
| | - Tomas Fex
- Astra & Zeneca AB, R&D, Mölndal, Sweden
| | | | - Sten Ohlson
- School of Natural Sciences, Linnaeus University, Kalmar, Sweden
- School of Biological Sciences, Nanyang Technological University, Singapore
| | - Roland Isaksson
- School of Natural Sciences, Linnaeus University, Kalmar, Sweden
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Abstract
Fragment screening, an emerging approach for hit finding in drug discovery, has recently been proven effective by its first approved drug, vemurafenib, for cancer treatment. Techniques such as nuclear magnetic resonance, surface plasmon resonance, and isothemal titration calorimetry, with their own pros and cons, have been employed for screening fragment libraries. As an alternative approach, screening based on high-performance liquid chromatography separation has been developed. In this work, we present weak affinity LC/MS as a method to screen fragments under high-throughput conditions. Affinity-based capillary columns with immobilized thrombin were used to screen a collection of 590 compounds from a fragment library. The collection was divided into 11 mixtures (each containing 35 to 65 fragments) and screened by MS detection. The primary screening was performed in <4 h (corresponding to >3500 fragments per day). Thirty hits were defined, which subsequently entered a secondary screening using an active site-blocked thrombin column for confirmation of specificity. One hit showed selective binding to thrombin with an estimated dissociation constant ( KD) in the 0.1 mM range. This study shows that affinity LC/MS is characterized by high throughput, ease of operation, and low consumption of target and fragments, and therefore it promises to be a valuable method for fragment screening.
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Affiliation(s)
| | | | - Tomas Fex
- Astra&Zeneca R&D Mölndal, Mölndal, Sweden
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Azadani A, Jonsson H, Park PO, Bergström M. A randomized trial comparing rates of abdominal contamination and postoperative infection among natural orifice transluminal endoscopic surgery, laparoscopic surgery, and open surgery in pigs. Gastrointest Endosc 2012; 75:849-55. [PMID: 22284088 DOI: 10.1016/j.gie.2011.11.039] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Accepted: 11/30/2011] [Indexed: 12/11/2022]
Abstract
BACKGROUND Bacterial contamination of the abdominal cavity and infectious complications have been debated concerning transgastric natural orifice transluminal endoscopic surgery (NOTES) procedures. OBJECTIVE The aim of this study was to compare bacterial contamination of the abdominal cavity and clinically relevant infections after open, laparoscopic, and transgastric NOTES procedures. DESIGN Randomized survival study in a porcine model. SETTING Animal laboratory at a university hospital. INTERVENTION Thirty pigs were randomized to open, laparoscopic, or transgastric NOTES uterine horn resection under sterile conditions. Bacterial cultures were obtained from the pelvic area immediately at entry of the abdominal cavity and just before closure. The left uterine horn was dissected and ligated. The animals survived for 4 weeks. At necropsy, bacterial culture was obtained from the pelvic area. MAIN OUTCOME MEASUREMENTS Perioperative: operation time and incision length, bacterial growth in abdominal samples. Postoperative: infections or complications, weight gain. Necropsy: signs of peritonitis or infection, abdominal bacterial growth. RESULTS Procedure time was significantly longer for transgastric NOTES. At the start of the procedure, 4 of the NOTES animals showed positive cultures, but only 1 showed positive cultures at the end. No open surgery or laparoscopic surgery animals showed positive cultures at these time points. At necropsy, none of the animals in the NOTES group showed bacterial growth, whereas 4 open surgery animals and 3 laparoscopic surgery animals had positive cultures. Four of these animals (2 from each group) had concurrent wound infections. LIMITATIONS Small sample size and lack of power calculation. CONCLUSION This study indicates that clinically relevant infections are rare after transgastric NOTES procedures despite evidence of bacterial contamination and longer operating times.
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Affiliation(s)
- Asghar Azadani
- Department of Surgery, Sahlgrenska University Hospital, Östra, Gothenburg, Sweden
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Bergström M, Åström E, Påhlsson P, Ohlson S. Elucidating the selectivity of recombinant forms of Aleuria aurantia lectin using weak affinity chromatography. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 885-886:66-72. [DOI: 10.1016/j.jchromb.2011.12.015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 12/08/2011] [Accepted: 12/14/2011] [Indexed: 12/30/2022]
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Landström J, Bergström M, Hamark C, Ohlson S, Widmalm G. Combining weak affinity chromatography, NMR spectroscopy and molecular simulations in carbohydrate–lysozyme interaction studies. Org Biomol Chem 2012; 10:3019-32. [DOI: 10.1039/c2ob07066a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Azadani A, Bergström M, Dot J, Abu-Suboh-Abadia M, Armengol-Miró JR, Park PO. A new in vivo method for testing closures of gastric NOTES incisions using leak of the closure or gastric yield as endpoints. J Laparoendosc Adv Surg Tech A 2011; 22:46-50. [PMID: 22145609 DOI: 10.1089/lap.2011.0387] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND We developed a non-survival in vivo model for testing of gastric natural orifice translumenal endoscopic surgery (NOTES) closures based on the gastric yield pressure. The aim of this study was to test our model comparing different endoscopic closure techniques with surgical closure of a NOTES gastric incision. METHODS Laparotomy was performed in 30 pigs. One tube for air inflation and one manometry tube were inserted into the stomach via the pylorus, which was closed gas-tight, and the abdominal wall was closed. The stomach was inflated with air, and the gastroesophageal yield pressure was measured. A gastroscopy was performed, and a standard NOTES access was created followed by randomization to closure by surgical suturing, T-tags, Padlock-G over-the-scope (OTS)-clips, OVESCO OTS-clips, and traditional clips. All closures were tested twice with air insufflation. Gastric yield pressure or leak pressure of each closure was recorded. RESULTS The mean baseline gastric yield pressure was 80.5 mm Hg. Post-closure yield pressure was 79.9 mm Hg. Leak test results after closure were as follows: surgery, 0/6 leaked; T-tags, 1/6 leaked before reaching yield pressure (56 mm Hg); Padlock-G, 2/5 leaked (71.5 mm Hg); OVESCO OTS-clips, 3/6 leaked (27.2 mm Hg); and traditional clips, 5/6 leaked (27.2 mm Hg). TAS T-tags and surgical closures leaked significantly less than the other groups (P=.01). Traditional clips and OVESCO OTS-clips leaked at significantly lower pressures than the other three groups (P=.007). CONCLUSION This in vivo model using leak of the closure or the gastric yield pressure as endpoints for testing of the closure strength of a NOTES gastric access site seems to be reproducible. Our results support closure with T-tags and Padlock-G-clips over OVESCO OTS-clips and standard endoscopic clips.
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Affiliation(s)
- Asghar Azadani
- Department of Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden
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Norberg P, Bergström M, Jethava V, Dubhashi D, Hermansson M. The IncP-1 plasmid backbone adapts to different host bacterial species and evolves through homologous recombination. Nat Commun 2011; 2:268. [PMID: 21468020 PMCID: PMC3104523 DOI: 10.1038/ncomms1267] [Citation(s) in RCA: 100] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 03/08/2011] [Indexed: 01/24/2023] Open
Abstract
Plasmids are important members of the bacterial mobile gene pool, and are among the most important contributors to horizontal gene transfer between bacteria. They typically harbour a wide spectrum of host beneficial traits, such as antibiotic resistance, inserted into their backbones. Although these inserted elements have drawn considerable interest, evolutionary information about the plasmid backbones, which encode plasmid related traits, is sparse. Here we analyse 25 complete backbone genomes from the broad-host-range IncP-1 plasmid family. Phylogenetic analysis reveals seven clades, in which two plasmids that we isolated from a marine biofilm represent a novel clade. We also found that homologous recombination is a prominent feature of the plasmid backbone evolution. Analysis of genomic signatures indicates that the plasmids have adapted to different host bacterial species. Globally circulating IncP-1 plasmids hence contain mosaic structures of segments derived from several parental plasmids that have evolved in, and adapted to, different, phylogenetically very distant host bacterial species. Plasmids are present in many bacteria and are often transferred between different species causing horizontal gene transfer. By comparing the sequences of 25 plasmid DNA backbones, the authors show that homologous recombination is prevalent in plasmids and that the plasmids have adapted to persist in different host bacteria.
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Affiliation(s)
- Peter Norberg
- Department of Cell and Molecular Biology, Microbiology, University of Gothenburg, Box 462, SE 413 46, Gothenburg, Sweden.
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Duong-Thi MD, Meiby E, Bergström M, Fex T, Isaksson R, Ohlson S. Weak affinity chromatography as a new approach for fragment screening in drug discovery. Anal Biochem 2011; 414:138-46. [PMID: 21352794 DOI: 10.1016/j.ab.2011.02.022] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2011] [Revised: 02/12/2011] [Accepted: 02/16/2011] [Indexed: 11/29/2022]
Abstract
Fragment-based drug design (FBDD) is currently being implemented in drug discovery, creating a demand for developing efficient techniques for fragment screening. Due to the intrinsic weak or transient binding of fragments (mM-μM in dissociation constant (K(D))) to targets, methods must be sensitive enough to accurately detect and quantify an interaction. This study presents weak affinity chromatography (WAC) as an alternative tool for screening of small fragments. The technology was demonstrated by screening of a selected 23-compound fragment collection of documented binders, mostly amidines, using trypsin and thrombin as model target protease proteins. WAC was proven to be a sensitive, robust, and reproducible technique that also provides information about affinity of a fragment in the range of 1 mM-10 μM. Furthermore, it has potential for high throughput as was evidenced by analyzing mixtures in the range of 10 substances by WAC-MS. The accessibility and flexibility of the technology were shown as fragment screening can be performed on standard HPLC equipment. The technology can further be miniaturized and adapted to the requirements of affinity ranges of the fragment library. All these features of WAC make it a potential method in drug discovery for fragment screening.
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Ohlson S, Duong-Thi MD, Bergström M, Fex T, Hansson L, Pedersen L, Guazotti S, Isaksson R. Toward high-throughput drug screening on a chip-based parallel affinity separation platform. J Sep Sci 2011; 33:2575-81. [PMID: 20730836 DOI: 10.1002/jssc.201000314] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
High-throughput screening of compound libraries, including the study of fragments, has become one of the cornerstones in modern drug discovery research. During this process hits are defined that may be developed into valuable leads and eventually into possible drug candidates. In this paper, we have demonstrated that parallel zonal weak affinity chromatography in microcolumns on a chip offers a possible screening format for weakly binding ligands toward a protein target. We used albumin as a model system because this transport protein is well established as a binder (both weak and strong) for drug substances. Bovine serum albumin was immobilized on microparticulate diolsilica particles and then packed into a 24-channel cartridge, which served as the separation platform. Analysis of the obtained chromatograms yielded information about affinity even in the millimolar range. Employing this approach, thousands of substances can be screened in just a day. We feel confident that zonal affinity chromatography will provide a useful technology in the future for performing high-throughput screening.
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Affiliation(s)
- Sten Ohlson
- School of Natural Sciences, Linnaeus University, Kalmar, Sweden.
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Cheshev P, Morelli L, Marchesi M, Podlipnik C, Bergström M, Bernardi A. Synthesis and affinity evaluation of a small library of bidentate cholera toxin ligands: towards nonhydrolyzable ganglioside mimics. Chemistry 2010; 16:1951-67. [PMID: 20039344 DOI: 10.1002/chem.200902469] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A small library of nonhydrolyzable mimics of GM1 ganglioside, featuring galactose and sialic acid as pharmacophoric carbohydrate residues, was synthesized and tested. All compounds were synthesized from readily available precursors using high-performance reactions, including click chemistry protocols, and avoiding O-glycosidic bonds. Some of the most active molecules also feature a point of further derivatization that can be used for conjugation with polyvalent aglycons. Their affinity towards cholera toxin was assessed by weak affinity chromatography, which allowed a systematic evaluation and selection of the best candidates. Affinity could be enhanced up to one or two orders of magnitude over the affinity of the individual pharmacophoric sugar residues.
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Affiliation(s)
- Pavel Cheshev
- Dipartimento di Chimica Organica e Industriale, Università degli Studi di Milano via Venezian 21, 20133 Milano, Italy
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Park PO, Long GL, Bergström M, Cunningham C, Vakharia OJ, Bakos GJ, Bally KR, Rothstein RI, Swain CP. A randomized comparison of a new flexible bipolar hemostasis forceps designed principally for NOTES versus a conventional surgical laparoscopic bipolar forceps for intra-abdominal vessel sealing in a porcine model. Gastrointest Endosc 2010; 71:835-41. [PMID: 19942215 DOI: 10.1016/j.gie.2009.08.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2009] [Accepted: 08/08/2009] [Indexed: 02/08/2023]
Abstract
BACKGROUND Current devices for hemostasis in flexible endoscopy are inferior to methods used during open or laparoscopic surgery and might be ineffective for natural orifice transluminal endoscopic surgery. OBJECTIVE To compare new flexible bipolar forceps (FBF), designed principally for natural orifice transluminal endoscopic surgery, with laparoscopic bipolar forceps (LBF) for hemostasis of intra-abdominal porcine arteries. SETTING Surgical laboratories in Europe and the United States. DESIGN AND INTERVENTIONS New FBF for hemostasis (3.7-mm diameter), featuring electrode isolation, were compared with rigid 5-mm LBF (ERBE BiClamp LAP forceps) at recommended settings. A porcine model of acute hemostasis was prepared by suturing the uterine horns and cecum to the abdominal wall, exposing uterine arteries, ovarian pedicles, cecal mesenteric bundles, and the inferior mesenteric artery. This allowed access to 10 vessels in each pig by transabdominal laparoscopic devices or a transgastric double-channel gastroscope. Vessels were measured, coagulated at 4 and more points, and transected. Blood pressure was increased to more than 200 mm Hg for 10 minutes by administering phenylephrine. Delayed bleeding was identified. MAIN OUTCOME MEASUREMENTS In 7 pigs, a total of 65 vessels (1.5-6.0 mm) were randomly allocated to FBF (n = 32) or LBF (n = 33). Successful hemostasis both before and after blood pressure increase was equivalent between the 2 groups (before: 88% FBF vs 88% LBF, not significant [NS]; after: 97% FBF vs 94% LBF, NS). With FBF, the number of seals per vessel was 4.8 vs 4.4 with LBF (NS). The energy used to create FBF seals was 19.8 J vs 38.2 J for LBF (P < .05). LIMITATIONS Results from porcine studies may not reflect patient outcomes. CONCLUSIONS In a porcine model, transgastric FBF endoscopic hemostasis was as effective as conventional laparoscopic hemostasis using LBF across a wide range of vessels.
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Affiliation(s)
- Per-Ola Park
- Department of Surgery, Sahlgrenska University Hospital/Ostra, Göteborg, Sweden
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Park PO, Bergström M, Rothstein R, Swain P, Ahmed I, Gomez G, Raju GS. Endoscopic sutured closure of a gastric natural orifice transluminal endoscopic surgery access gastrotomy compared with open surgical closure in a porcine model. A randomized, multicenter controlled trial. Endoscopy 2010; 42:311-7. [PMID: 20200808 DOI: 10.1055/s-0029-1243938] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
BACKGROUND AND STUDY AIMS In natural orifice transluminal endoscopic surgery (NOTES) procedures it is essential to be able to perform secure closure of the access perforation. The aim of this study was to compare endoscopically sutured closure of a gastric access gastrotomy using the tissue apposition system (TAS), with closure via laparotomy in a randomized multicenter study. METHODS A total of 32 pigs (18 - 42 kg) were used in this study. The gastric NOTES access was created using a needle knife and a 20-mm balloon. Following transgastric pelvic peritoneoscopy, the endoscope was withdrawn into the stomach. The animals were then randomized to endoscopic closure or laparotomy with surgical closure. Procedure time, recovery time, and weight gain were measured. At necropsy, adhesions, abscesses or peritonitis were recorded. RESULTS Of the 32 pigs, 29 survived 14 days without complications. All endoscopic and all open surgical closures were secure at postmortem. On average two suture pairs were used for endoscopic closure. Surgical closure was quicker (12.5 vs. 20.1 minutes). Recovery time and postoperative weight gain were similar for both groups. Two pigs in the endoscopic group died: one of gastric dilatation, without leakage from the gastrotomy; another was euthanized due to rectal prolapse. In the laparotomy group one pig was euthanized after 7 days due to abdominal wound dehiscence. At necropsy there were significantly more intra-abdominal adhesions in the laparotomized group. CONCLUSION This randomized controlled study of endoscopic and surgical closure of a gastrotomy made for transperitoneal access for NOTES procedures suggests that both techniques are comparable in technical closure rates, postoperative recovery, and prevention of peritonitis. There were fewer adhesions in the endoscopic group.
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Affiliation(s)
- P O Park
- Department of Surgery, South Alvsborg Hospital, 50182 Boras, Sweden.
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Lendvai G, Estrada S, Bergström M. Radiolabelled oligonucleotides for imaging of gene expression with PET. Curr Med Chem 2010; 16:4445-61. [PMID: 19835563 DOI: 10.2174/092986709789712844] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2009] [Accepted: 09/20/2009] [Indexed: 11/22/2022]
Abstract
Our understanding of altered patterns of gene expression being responsible for many diseases has been growing thanks to modern molecular biological methods. Today, these changes can only be identified when tissue samples are available. Therefore, a noninvasive method allowing us to monitor gene expression in vivo would be valuable, not only as a research tool, but also for patient stratification before treatment and for treatment follow-up. Antisense oligonucleotides (ODN) have been considered to be suitable molecules to trace active genes in vivo, as well as to treat diseases by hybridising to its complementary messenger RNA (mRNA) sequence in the cells thereby preventing the synthesis of the peptide. However, the use of ODNs in the organisms are endangered by many hurdles such as physical barriers to pass and enzyme attack to be avoided. Positron emission tomography (PET) provides a most advanced in vivo imaging technology that allows the exploration of the fate of radionuclide-labelled antisense ODNs in the body; thereby providing information about biodistribution and quantitative accumulation in tissues to assess pharmacokinetic properties of ODNs. This kind of evaluation is important as part of the characterisation of antisense therapeutics but also as part of the development of antisense imaging agents. This review provides a general summary about the antisense concept and displays the present status of the antisense imaging field with the major achievements and remaining challenges on the long journey towards accomplishing in vivo monitoring of gene expression using PET.
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Affiliation(s)
- G Lendvai
- Uppsala Imanet, P.O. Box 967, S-751 09 Uppsala, Sweden
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Abstract
We present a series of three patients operated on by means of natural-orifice transgastric peritoneoscopy, including one appendectomy. A standard double-lumen gastroscope was used together with standard endoscopic tools. In all patients abdominal access through the gastric wall was smooth using a needle-knife/guide-wire/balloon technique. The whole abdominal cavity could be visualized and the appendix was found in two patients. In one patient the procedure was converted to laparoscopic appendectomy and in one to open surgery. In the third patient transgastric appendectomy was performed. The gastric access site was closed with the T-tag technique. Patients were allowed to drink and eat as soon as they woke up. Postoperatively patients were followed clinically and with standard laboratory tests daily until discharged. One patient (converted to open surgery) had a serious complication (pneumothorax). The transgastric approach to the abdominal cavity was shown to be feasible, but significant technical problems remain to be resolved.
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Affiliation(s)
- P O Park
- Department of Surgery, Sahlgrenska University Hospital - Ostra, Gothenburg, Sweden.
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Hjort K, Bergström M, Adesina MF, Jansson JK, Smalla K, Sjöling S. Chitinase genes revealed and compared in bacterial isolates, DNA extracts and a metagenomic library from a phytopathogen-suppressive soil. FEMS Microbiol Ecol 2009; 71:197-207. [PMID: 19922433 DOI: 10.1111/j.1574-6941.2009.00801.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Soil that is suppressive to disease caused by fungal pathogens is an interesting source to target for novel chitinases that might be contributing towards disease suppression. In this study, we screened for chitinase genes, in a phytopathogen-suppressive soil in three ways: (1) from a metagenomic library constructed from microbial cells extracted from soil, (2) from directly extracted DNA and (3) from bacterial isolates with antifungal and chitinase activities. Terminal restriction fragment length polymorphism (T-RFLP) of chitinase genes revealed differences in amplified chitinase genes from the metagenomic library and the directly extracted DNA, but approximately 40% of the identified chitinase terminal restriction fragments (TRFs) were found in both sources. All of the chitinase TRFs from the isolates were matched to TRFs in the directly extracted DNA and the metagenomic library. The most abundant chitinase TRF in the soil DNA and the metagenomic library corresponded to the TRF(103) of the isolate Streptomyces mutomycini and/or Streptomyces clavifer. There were good matches between T-RFLP profiles of chitinase gene fragments obtained from different sources of DNA. However, there were also differences in both the chitinase and the 16S rRNA gene T-RFLP patterns depending on the source of DNA, emphasizing the lack of complete coverage of the gene diversity by any of the approaches used.
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Affiliation(s)
- Karin Hjort
- Södertörn University, School of Life Sciences, Huddinge, Sweden
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Bergström M, Kieler H, Waldenström U. P468 Effects of natural childbirth preparation versus standard antenatal education on epidural rates, experience of childbirth and parental stress in mothers and fathers: a randomised controlled multicentre trial. Int J Gynaecol Obstet 2009. [DOI: 10.1016/s0020-7292(09)61959-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Falk P, Bergström M, Palmgren I, Holmdahl L, Breimer ME, Ivarsson ML. Studies of TGF-β1-3 in Serosal Fluid During Abdominal Surgery and Their Effect on In Vitro Human Mesothelial Cell Proliferation. J Surg Res 2009; 154:312-6. [DOI: 10.1016/j.jss.2008.05.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2008] [Revised: 04/17/2008] [Accepted: 05/13/2008] [Indexed: 10/21/2022]
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Bergström M, Kieler H, Waldenström U. Effects of natural childbirth preparation versus standard antenatal education on epidural rates, experience of childbirth and parental stress in mothers and fathers: a randomised controlled multicentre trial. BJOG 2009; 116:1167-76. [PMID: 19538406 PMCID: PMC2759981 DOI: 10.1111/j.1471-0528.2009.02144.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Objective To examine the effects of antenatal education focussing on natural childbirth preparation with psychoprophylactic training versus standard antenatal education on the use of epidural analgesia, experience of childbirth and parental stress in first-time mothers and fathers. Design Randomised controlled multicentre trial. Setting Fifteen antenatal clinics in Sweden between January 2006 and May 2007. Sample A total of 1087 nulliparous women and 1064 of their partners. Methods Natural group: Antenatal education focussing on natural childbirth preparation with training in breathing and relaxation techniques (psychoprophylaxis). Standard care group: Standard antenatal education focussing on both childbirth and parenthood, without psychoprophylactic training. Both groups: Four 2-hour sessions in groups of 12 participants during third trimester of pregnancy and one follow-up after delivery. Main outcome measures Epidural analgesia during labour, experience of childbirth as measured by the Wijma Delivery Experience Questionnaire (B), and parental stress measured by the Swedish Parenthood Stress Questionnaire. Results The epidural rate was 52% in both groups. There were no statistically significant differences in the experience of childbirth or parental stress between the randomised groups, either in women or men. Seventy percent of the women in the Natural group reported having used psychoprophylaxis during labour. A minority in the Standard care group (37%) had also used this method, but subgroup analysis where these women were excluded did not change the principal findings. Conclusion Natural childbirth preparation including training in breathing and relaxation did not decrease the use of epidural analgesia during labour, nor did it improve the birth experience or affect parental stress in early parenthood in nulliparous women and men, compared with a standard form of antenatal education.
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Affiliation(s)
- M Bergström
- Department of Woman and Child Health, Retsius väg 13, Karolinska Institutet, Stockholm, Sweeden.
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