1
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Larsson L, Ohlsson S, Andersson TN, Watz E, Larsson S, Sandgren P, Uhlin M. Pathogen reduced red blood cells as an alternative to irradiated and washed components with potential for up to 42 days storage. Blood Transfus 2024; 22:130-139. [PMID: 37458715 PMCID: PMC10920064 DOI: 10.2450/bloodtransfus.479] [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] [MESH Headings] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Accepted: 05/10/2023] [Indexed: 03/06/2024]
Abstract
BACKGROUND The urgency of maintaining a safe and adequate blood supply is increasing. One approach to ensure a sufficient supply is to limit the outdating frequency of blood components. Pathogen inactivation technology was developed primarily to increase safety by preventing transmission of infectious diseases. The Intercept Blood System for pathogen reduction of red blood cells (RBC) has additional benefits such as inactivation of leucocytes and removal of plasma and storage debris through centrifugation. Irradiation and automated washing are detrimental to the RBC membrane and often implicate shortened shelf-life. We aimed to assess whether pathogen inactivation can replace RBC irradiation and washing to avoid shelf-life reduction. MATERIALS AND METHODS RBC concentrates (No.=48) were pooled-and-split into four study arms, which underwent pathogen inactivation treatment, irradiation, automated washing or no treatment (reference). RBC quality was evaluated during 42 days by assessment of storage lesion. Washing efficacy was defined by IgA and albumin reduction. RESULTS Pathogen reduced RBCs had similar membrane preservation to reference RBCs (hemolysis, microvesicles and extracellular potassium ions), whereas the RBCs were negatively impacted by irradiation or automated washing. ATP increased substantially post-pathogen inactivation, while 2,3-DPG decreased. Pathogen inactivation considerably reduced albumin and IgA, though slightly less efficiently than automated washing. DISCUSSION RBCs exhibit superior membrane preservation after pathogen inactivation treatment, compared to both irradiation and automated washing. This suggests that replacement is possible, even though the plasma reduction protocol could be further optimised.Replacement of irradiated and washed RBC concentrates with pathogen reduced RBC concentrates storable up to 42 days would be advantageous for both the blood supply and patient safety.
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Affiliation(s)
- Linda Larsson
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Sara Ohlsson
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Theresa Neimert Andersson
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Emma Watz
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Immunology and Transfusion Medicine, Uppsala University Hospital, Uppsala, Sweden
| | - Stella Larsson
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Per Sandgren
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Michael Uhlin
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
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2
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Klei TRL, Begue S, Lotens A, Sigurjónsson ÓE, Wiltshire MD, George C, van den Burg PJM, Evans R, Larsson L, Thomas S, Najdovski T, Handke W, Eronen J, Mallas B, de Korte D. Recommendations for in vitro evaluation of blood components collected, prepared and stored in non-DEHP medical devices. Vox Sang 2023; 118:165-177. [PMID: 36510371 DOI: 10.1111/vox.13384] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 10/06/2022] [Revised: 11/15/2022] [Accepted: 11/15/2022] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND OBJECTIVES DEHP, di(2-ethylhexyl) phthalate, is the most common member of the class of ortho-phthalates, which are used as plasticizers. The Medical Device Regulation has restricted the use of phthalates in medical devices. Also DEHP has been added to the Annex XIV of REACH, "Registration, Evaluation, Authorisation and Restriction of Chemicals" due to its endocrine disrupting properties to the environment. As such, the sunset date for commercialisation of DEHP-containing blood bags is May 27th 2025. There are major concerns in meeting this deadline as these systems have not yet been fully validated and/or CE-marked. Also, since DEHP is known to affect red cell quality during storage, it is imperative to transit to non-DEHP without affecting blood product quality. Here, EBA members aim to establish common grounds on the evaluation and assessment of blood components collected, prepared and stored in non-DEHP devices. MATERIALS AND METHODS Based on data as well as the input of relevant stakeholders a rationale for the validation of each component was composed. RESULTS The red cell components will require the most extensive validation as their quality is directly affected by the absence of DEHP, as opposed to platelet and plasma components. CONCLUSION Studies in the scope of evaluating the quality of blood products obtained with non-DEHP devices, under the condition that they are carried out according to these recommendations, could be used by all members of the EBA to serve as scientific support in the authorization process specific to their jurisdiction or for their internal validation use.
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Affiliation(s)
- Thomas R L Klei
- Department of Product and Process Development, Sanquin Blood Supply, Amsterdam, The Netherlands
| | - Stephane Begue
- Etabissement Francais du Sang, Guadeloupe-Guyana et Martinique, Pointe-à-Pitre, France
| | - Anaïs Lotens
- Service du Sang, Belgian Red Cross, Brussel, Belgium
| | - Ólafur E Sigurjónsson
- Blood bank, Landspitalinn, Reykjavik, Iceland.,School of Technology, University of Iceland, Reykjavik, Iceland
| | | | - Chloë George
- Department of Component Development, Welsh Blood Service, Wrexham, UK
| | | | - Ryan Evans
- Department of New Developments, Scottish National Blood Transfusion Service, Edinburgh, UK
| | - Linda Larsson
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockhold, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockhol, Sweden
| | | | | | - Wiebke Handke
- Department of Research and Development, Bavarian Red Cross Blood Service, Nuremberg, Germany
| | - Juha Eronen
- Finnish Red Cross Blood Service, Helsinki, Finland
| | - Birte Mallas
- Finnish Red Cross Blood Service, Helsinki, Finland
| | - Dirk de Korte
- Department of Product and Process Development, Sanquin Blood Supply, Amsterdam, The Netherlands
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3
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Erickson A, Berglund E, He M, Marklund M, Mirzazadeh R, Schultz N, Bergenstråhle L, Kvastad L, Andersson A, Bergenstråhle J, Larsson L, Rajakumar T, Thrane K, Ji A, Tarish F, Tanoglidi A, Maaskola J, Colling R, Mirtti T, Hamdy F, Woodcock D, Helleday T, Mills I, Lamb A, Lundenberg J. The spatial landscape of clonal somatic mutations in benign and malignant prostate epithelia. Eur Urol 2022. [DOI: 10.1016/s0302-2838(22)00563-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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4
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Larsson L, Ohlsson S, Derving J, Diedrich B, Sandgren P, Larsson S, Uhlin M. DEHT is a suitable plasticizer option for phthalate-free storage of irradiated red blood cells. Vox Sang 2021; 117:193-200. [PMID: 34268809 DOI: 10.1111/vox.13177] [Citation(s) in RCA: 2] [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: 03/08/2021] [Revised: 06/20/2021] [Accepted: 06/20/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND AND OBJECTIVES Due to increasing concerns about possible endocrine-disrupting properties, the use of the plasticizer di(2-ethylhexyl) phthalate (DEHP) will be banned in future blood storage. Di(2-ethylhexyl) terephthalate (DEHT) provides sufficient red blood cell (RBC) quality during conventional blood bank storage. It is important that a new plasticizer also maintains acceptable quality during exposure to high cell stress, such as irradiation, which is commonly used to prevent graft-versus-host disease. MATERIALS AND METHODS A total of 59 RBC units were collected and processed in polyvinyl chloride (PVC)-DEHT or PVC-DEHP blood bags combined with either saline-adenine-glucose-mannitol (SAGM) or phosphate-adenine-glucose-guanosine-saline-mannitol (PAGGSM) additive solution. All units were X-ray irradiated on day 2 post-collection. Sampling for assessment of parameters of storage lesion was performed on day 2 pre-irradiation and day 14 and 28 post-irradiation. RESULTS Though irradiation increased cell stress, DEHT/PAGGSM and current common European preference DEHP/SAGM were equally affected up to 14 days post-irradiation for all measured parameters. At day 28, haemolysis and microvesicle count were slightly increased in DEHT, whereas extracellular potassium ions, glucose, lactate, pH, mean corpuscular volume and microvesicle phosphatidylserine remained unaffected by plasticizer choice throughout storage. No individual unit exceeded 0.8% haemolysis, not even in DEHT/SAGM, the combination overall most affected by irradiation. Of the four combinations, membrane stability was least impacted in DEHP/PAGGSM. CONCLUSION We demonstrate that DEHT is a suitable plasticizer for storage of RBCs after X-ray irradiation cell stress. This strengthens the option of DEHT as a viable non-phthalate substitute for DEHP.
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Affiliation(s)
- Linda Larsson
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Sara Ohlsson
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Julia Derving
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Beatrice Diedrich
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Per Sandgren
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Stella Larsson
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Michael Uhlin
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
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5
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Berglund E, Wikner A, Larsson L, Rinnstrom D, Christersson C, Dellborg M, Nielsen N, Sorensson P, Thilen U, Johansson B. Late cardiac interventions in adults with congenital ventricular septal defects. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2201] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Ventricular septal defect (VSD) is one of the most common congenital heart lesions. Shunts with hemodynamic significance are usually closed early in life whereas small shunts are left without intervention. The need for late cardiac interventions in these populations is essentially unknown. The aim was to study the late cardiac interventions in adults with VSD.
Methods
The national register on congenital heart disease was searched for patients with VSD with or without associated simple cardiac defects but without complex lesions. For these patients, the last 10 years (over the age of 18) in the national patient register was searched for cardiac interventions.
Results
774 patients (mean age 39.0±14.7 years, women =50.6%), 224 (28.9%) with previous closure of VSD, were identified. The total observed time was 6920 patient years. There were 43 interventions in 41 patients (5.3%) of whom 12 had a previous closure of VSD. Twelve patients had isolated closure of VSD, 18 closure of VSD together with other cardiac surgery (one of these had repeated cardiac surgery) and 8 had only other cardiac surgery. In 4 cases, a pacemaker was implanted, of whom one together with cardiac surgery.
Conclusion
The need for cardiac interventions is relatively common in adults with a VSD, also in those without previous closure of their shunt. Our data suggests that most patients with a VSD, closed or not, should be offered periodic follow-up as approximately one out of 20 patients may encounter a complication within 10 years.
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): The Swedish Heart-Lung Foundation
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Affiliation(s)
- E Berglund
- Umea University, Department of Public Health and Clinical Medicine, Umea, Sweden
| | - A Wikner
- Umea University, Department of Public Health and Clinical Medicine, Umea, Sweden
| | - L Larsson
- Umea University, Department of Public Health and Clinical Medicine, Umea, Sweden
| | - D Rinnstrom
- Umea University, Department of Public Health and Clinical Medicine, Umea, Sweden
| | - C Christersson
- Uppsala University Hospital, Department of Medical Sciences, Uppsala, Sweden
| | - M Dellborg
- Sahlgrenska Academy - University of Gothenburg, Department of Molecular and Clinical Medicine, Goteborg, Sweden
| | - N.E Nielsen
- Linkoping University Hospital, Department of Medical and Health Sciences, Linkoping, Sweden
| | - P Sorensson
- Karolinska Institutet, Department of Molecular Medicine and Surgery, Stockholm, Sweden
| | - U Thilen
- Skane University Hospital, Department of Clinical Sciences, Lund, Sweden
| | - B Johansson
- Umea University, Department of Public Health and Clinical Medicine, Umea, Sweden
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6
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Larsson L, Sandgren P, Ohlsson S, Derving J, Friis-Christensen T, Daggert F, Frizi N, Reichenberg S, Chatellier S, Diedrich B, Antovic J, Larsson S, Uhlin M. Non-phthalate plasticizer DEHT preserves adequate blood component quality during storage in PVC blood bags. Vox Sang 2020; 116:60-70. [PMID: 32918773 DOI: 10.1111/vox.12982] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 02/17/2020] [Revised: 06/02/2020] [Accepted: 07/01/2020] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVES Commercial blood bags are predominantly made of polyvinyl chloride (PVC) plasticized with di(2-ethylhexyl) phthalate (DEHP). DEHP is favourable for storage of red blood cells (RBC). Historically, removal of DEHP from blood bags has been linked to unacceptable haemolysis levels. Oncoming regulatory restrictions for DEHP due to toxicity concerns increase the urgency to replace DEHP without compromising RBC quality. Di(2-ethylhexyl) terephthalate (DEHT) is one suggested substitute. The aim of this study was to compare PVC-DEHT to PVC-DEHP blood bags using additive solutions saline-adenine-glucose-mannitol (SAGM) and phosphate-adenine-glucose-guanosine-saline-mannitol (PAGGSM), to determine whether DEHT can maintain acceptable component quality. MATERIALS AND METHODS RBC concentrates (N = 64), platelet concentrates (N = 16) and fresh frozen plasma (N = 32) were produced from whole blood collected into either DEHT or DEHP plasticized systems. Using a pool-and-split study design, pairs of identical RBC content were created within each plasticizer arm and assigned either SAGM or PAGGSM. Storage effects were assessed weekly for 49 days (RBC), 7 days (platelets) and before/after freezing (plasma). RESULTS Though haemolysis was slightly higher in DEHT, all study arms remained below half of the European limit 0·8%. K+ was lower in DEHT than in DEHP independent of additive solution. The metabolic parameters were not influenced by choice of plasticizer. Platelet activation/metabolism and plasma content were similarly preserved. CONCLUSION Our study demonstrates that the plasticizer DEHT provides adequate blood component quality. We propose DEHT as a strong future candidate for replacement of DEHP in blood bags.
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Affiliation(s)
- Linda Larsson
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Per Sandgren
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Sara Ohlsson
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Julia Derving
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | | | | | | | | | | | - Beatrice Diedrich
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Jovan Antovic
- Department of Coagulation Research, Institute for Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Chemistry, Karolinska University Hospital, Stockholm, Sweden
| | - Stella Larsson
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Michael Uhlin
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
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7
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Wang CW, Yu SH, Fretwurst T, Larsson L, Sugai JV, Oh J, Lehner K, Jin Q, Giannobile WV. Maresin 1 Promotes Wound Healing and Socket Bone Regeneration for Alveolar Ridge Preservation. J Dent Res 2020; 99:930-937. [PMID: 32384864 PMCID: PMC7338694 DOI: 10.1177/0022034520917903] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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] [Indexed: 12/31/2022] Open
Abstract
Tooth extraction results in alveolar bone resorption and is accompanied by postoperative swelling and pain. Maresin 1 (MaR1) is a proresolving lipid mediator produced by macrophages during the resolution phase of inflammation, bridging healing and tissue regeneration. The aim of this study was to examine the effects of MaR1 on tooth extraction socket wound healing in a preclinical rat model. The maxillary right first molars of Sprague-Dawley rats were extracted, and gelatin scaffolds were placed into the sockets with or without MaR1. Topical application was also given twice a week until complete socket wound closure up to 14 d. Immediate postoperative pain was assessed by 3 scores. Histology and microcomputed tomography were used to assess socket bone fill and alveolar ridge dimensional changes at selected dates. The assessments of coded specimens were performed by masked, calibrated examiners. Local application of MaR1 potently accelerated extraction socket healing. Macroscopic and histologic analysis revealed a reduced soft tissue wound opening and more rapid re-epithelialization with MaR1 delivery versus vehicle on socket healing. Under micro-computed tomography analysis, MaR1 (especially at 0.05 μg/μL) stimulated greater socket bone fill at day 10 as compared with the vehicle-treated animals, resulting in less buccal plate resorption and a wider alveolar ridge by day 21. Interestingly, an increased ratio of CD206+:CD68+ macrophages was identified in the sockets with MaR1 application under immunohistochemistry and immunofluorescence analysis. As compared with the vehicle therapy, local delivery of MaR1 reduced immediate postoperative surrogate pain score panels. In summary, MaR1 accelerated extraction wound healing, promoted socket bone fill, preserved alveolar ridge bone, and reduced postoperative pain in vivo with a rodent preclinical model. Local administration of MaR1 offers clinical potential to accelerate extraction socket wound healing for more predictable dental implant reconstruction.
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Affiliation(s)
- C W Wang
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - S H Yu
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - T Fretwurst
- Department of Oral and Craniomaxillofacial Surgery, Faculty of Medicine, Medical Center-University of Freiburg, Freiburg, Germany
| | - L Larsson
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.,Department of Periodontology, Institute of Odontology, University of Gothenburg, Goteborg, Sweden
| | - J V Sugai
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.,Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA
| | - J Oh
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - K Lehner
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
| | - Q Jin
- Department of Cariology, Restorative Sciences and Endodontics, University of Michigan, Ann Arbor, MI, USA
| | - W V Giannobile
- Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.,Biointerfaces Institute, University of Michigan, Ann Arbor, MI, USA.,Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
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8
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Larsson L, Landin-Olsson M, Nilsson C. Weight Development in Children After Gastric Bypass Surgery. J Family Reprod Health 2020. [DOI: 10.18502/jfrh.v13i4.2625] [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: 11/24/2022] Open
Abstract
Objective: More and more young obese women get pregnant after undergoing gastric bypass surgery (GBP) but little is known about weight development in their offspring. The first aim of this study was to investigate weight development of children whose mothers have undergone GBP before pregnancy and compare them to age specific reference values in Sweden. Second aim was to study the frequency of small for gestational age (SGA) in this population.
Materials and methods: Weight of offspring (38 male and 28 female) where the mother had undergone GBP before pregnancy were studied from birth up to 18 months of age and compared to age-specific reference values in Sweden.
Results: The boys to mothers who had undergone GBP before pregnancy weighed more than Swedish reference values at 6 months, 8.44 ± 1.18 kilogram (kg) (n = 35) vs. 7.98 ± 0.81 kg (n = 1388; p = 0.001), and less at 18 months, 11.54 ± 0.93 kg (n = 19) vs. 12.27 ± 1.19 kg (n = 862; p < 0.001). The girls to mothers who had undergone GBP before pregnancy weighed more than Swedish reference values at 6 months, 7.84 ± 1.00 kg (n = 28) vs. 7.50 ± 0.77 kg (n = 1375; p = 0.020). Frequency of SGA was 3.0%.
Conclusion: No clear pattern was found concerning the short-term weight development of the children. However, studies with larger material and more follow up time must be performed.
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9
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Larsson L, Landin-Olsson M, Nilsson C. Weight Development in Children After Gastric Bypass Surgery. J Family Reprod Health 2019; 13:176-180. [PMID: 32518567 PMCID: PMC7264865] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objective: More and more young obese women get pregnant after undergoing gastric bypass surgery (GBP) but little is known about weight development in their offspring. The first aim of this study was to investigate weight development of children whose mothers have undergone GBP before pregnancy and compare them to age specific reference values in Sweden. Second aim was to study the frequency of small for gestational age (SGA) in this population. Materials and methods: Weight of offspring (38 male and 28 female) where the mother had undergone GBP before pregnancy were studied from birth up to 18 months of age and compared to age-specific reference values in Sweden. Results: The boys to mothers who had undergone GBP before pregnancy weighed more than Swedish reference values at 6 months, 8.44 ± 1.18 kilogram (kg) (n = 35) vs. 7.98 ± 0.81 kg (n = 1388; p = 0.001), and less at 18 months, 11.54 ± 0.93 kg (n = 19) vs. 12.27 ± 1.19 kg (n = 862; p < 0.001). The girls to mothers who had undergone GBP before pregnancy weighed more than Swedish reference values at 6 months, 7.84 ± 1.00 kg (n = 28) vs. 7.50 ± 0.77 kg (n = 1375; p = 0.020). Frequency of SGA was 3.0%. Conclusion: No clear pattern was found concerning the short-term weight development of the children. However, studies with larger material and more follow up time must be performed.
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Affiliation(s)
- Linda Larsson
- Department of Paediatrics, Institution of Clinical Sciences, Helsingborg Hospital, Lund University, Sweden
| | - Mona Landin-Olsson
- Department of Endocrinology, Institution of Clinical Sciences, Skåne University Hospital, Lund University, Sweden
| | - Charlotta Nilsson
- Department of Paediatrics, Institution of Clinical Sciences, Helsingborg Hospital, Lund University, Sweden
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10
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Larsson L, Larsson S, Derving J, Watz E, Uhlin M. A novel protocol for cryopreservation of paediatric red blood cell units allows increased availability of rare blood types. Vox Sang 2019; 114:711-720. [DOI: 10.1111/vox.12829] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 07/02/2019] [Accepted: 07/02/2019] [Indexed: 12/29/2022]
Affiliation(s)
- Linda Larsson
- Department of Clinical Science, Intervention and Technology (CLINTEC) Karolinska Institutet Stockholm Sweden
- Department of Clinical Immunology and Transfusion Medicine Karolinska University Hospital Stockholm Sweden
| | - Stella Larsson
- Department of Clinical Immunology and Transfusion Medicine Karolinska University Hospital Stockholm Sweden
| | - Julia Derving
- Department of Clinical Immunology and Transfusion Medicine Karolinska University Hospital Stockholm Sweden
| | - Emma Watz
- Department of Clinical Science, Intervention and Technology (CLINTEC) Karolinska Institutet Stockholm Sweden
- Department of Clinical Immunology and Transfusion Medicine Karolinska University Hospital Stockholm Sweden
| | - Michael Uhlin
- Department of Clinical Science, Intervention and Technology (CLINTEC) Karolinska Institutet Stockholm Sweden
- Department of Clinical Immunology and Transfusion Medicine Karolinska University Hospital Stockholm Sweden
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11
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Littmann K, Ahmed O, Gustafsson U, Pramfalk C, Öörni K, Larsson L, Sahlin S, Camejo G, Parini P, Eriksson M. Simvastatin and ezetimibe reduce plasma lipoprotein binding to human arterial proteoglycans in gallstone diseased patients. Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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12
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Larsson L, Johansson B, Sandberg C, Moons P. P1236Geographical variation in and predictors of physical activity level in adults with congenital heart disease. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.p1236] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | | | | | - P Moons
- University of Leuven, Leuven, Belgium
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13
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Robledo-Sierra J, Landin-Wilhelmsen K, Filipsson Nyström H, Eggertsen R, Larsson L, Dafar A, Warfvinge G, Mattsson U, Jontell M. A mechanistic linkage between oral lichen planus and autoimmune thyroid disease. Oral Dis 2018; 24:1001-1011. [DOI: 10.1111/odi.12850] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 01/22/2018] [Accepted: 02/25/2018] [Indexed: 11/28/2022]
Affiliation(s)
- J Robledo-Sierra
- Department of Oral Medicine and Pathology; Institute of Odontology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - K Landin-Wilhelmsen
- Institute of Medicine; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
- Department of Endocrinology; Sahlgrenska University Hospital; Gothenburg Sweden
| | - H Filipsson Nyström
- Institute of Medicine; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
- Department of Endocrinology; Sahlgrenska University Hospital; Gothenburg Sweden
| | - R Eggertsen
- Institute of Medicine; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
- Department of Primary Health Care; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - L Larsson
- Department of Periodontology; Institute of Odontology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - A Dafar
- Department of Oral Medicine and Pathology; Institute of Odontology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - G Warfvinge
- Department of Oral Pathology; Malmö University; Malmö Sweden
| | - U Mattsson
- Department of Oral Medicine and Pathology; Institute of Odontology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - M Jontell
- Department of Oral Medicine and Pathology; Institute of Odontology; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
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Salah H, Fury W, Gromada J, Bai Y, Tchkonia T, Kirkland JL, Larsson L. Muscle-specific differences in expression and phosphorylation of the Janus kinase 2/Signal Transducer and Activator of Transcription 3 following long-term mechanical ventilation and immobilization in rats. Acta Physiol (Oxf) 2018; 222. [PMID: 29032602 DOI: 10.1111/apha.12980] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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: 05/16/2017] [Revised: 09/18/2017] [Accepted: 10/10/2017] [Indexed: 12/22/2022]
Abstract
AIM Muscle wasting is one of the factors most strongly predicting mortality and morbidity in critically ill intensive care unit (ICU). This muscle wasting affects both limb and respiratory muscles, but the understanding of underlying mechanisms and muscle-specific differences remains incomplete. This study aimed at investigating the temporal expression and phosphorylation of the Janus kinase/signal transducer and activator of transcription (JAK/STAT) pathway in muscle wasting associated with the ICU condition to characterize the JAK/STAT proteins and the related changes leading or responding to their activation during exposure to the ICU condition. METHODS A novel experimental ICU model allowing long-term exposure to the ICU condition, immobilization and mechanical ventilation, was used in this study. Rats were pharmacologically paralysed by post-synaptic neuromuscular blockade and mechanically ventilated for durations varying between 6 hours and 14 days to study muscle-specific differences in the temporal activation of the JAK/STAT pathway in plantaris, intercostal and diaphragm muscles. RESULTS The JAK2/STAT3 pathway was significantly activated irrespective of muscle, but muscle-specific differences were observed in the temporal activation pattern between plantaris, intercostal and diaphragm muscles. CONCLUSION The JAK2/STAT3 pathway was differentially activated in plantaris, intercostal and diaphragm muscles in response to the ICU condition. Thus, JAK2/STAT3 inhibitors may provide an attractive pharmacological intervention strategy in immobilized ICU patients, but further experimental studies are required in the study of muscle-specific effects on muscle mass and function in response to both short- and long-term exposure to the ICU condition prior to the translation into clinical research and practice.
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Affiliation(s)
- H. Salah
- Department of Physiology and Pharmacology; Karolinska Institutet; Stockholm Sweden
- Department of Neuroscience; Clinical Neurophysiology; Uppsala University; Uppsala Sweden
| | - W. Fury
- Regeneron Pharmaceuticals; Tarrytown NY USA
| | - J. Gromada
- Regeneron Pharmaceuticals; Tarrytown NY USA
| | - Y. Bai
- Regeneron Pharmaceuticals; Tarrytown NY USA
| | - T. Tchkonia
- Robert and Arlene Kogod Center on Aging; Mayo Clinic College of Medicine; Rochester MN USA
| | - J. L. Kirkland
- Robert and Arlene Kogod Center on Aging; Mayo Clinic College of Medicine; Rochester MN USA
| | - L. Larsson
- Department of Physiology and Pharmacology; Karolinska Institutet; Stockholm Sweden
- Department of Clinical Neuroscience; Clinical Neurophysiology; Karolinska Institutet; Stockholm Sweden
- Department of Biobehavioral Health; The Pennsylvania State University; State College PA USA
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15
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Friedrich O, Diermeier S, Larsson L. Weak by the machines: muscle motor protein dysfunction - a side effect of intensive care unit treatment. Acta Physiol (Oxf) 2018; 222. [PMID: 28387014 DOI: 10.1111/apha.12885] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 02/15/2017] [Revised: 03/12/2017] [Accepted: 04/04/2017] [Indexed: 12/25/2022]
Abstract
Intensive care interventions involve periods of mechanical ventilation, sedation and complete mechanical silencing of patients. Critical illness myopathy (CIM) is an ICU-acquired myopathy that is associated with limb muscle weakness, muscle atrophy, electrical silencing of muscle and motor proteinopathy. The hallmark of CIM is a preferential muscle myosin loss due to increased catabolic and reduced anabolic activity. The ubiquitin proteasome pathway plays an important role, apart from recently identified novel mechanisms affecting non-lysosomal protein degradation or autophagy. CIM is not reproduced by pure disuse atrophy, denervation atrophy, steroid-induced atrophy or septic myopathy, although combinations of high-dose steroids and denervation can mimic CIM. New animal models of critical illness and ICU treatment (i.e. mechanical ventilation and complete immobilization) provide novel insights regarding the time course of protein synthesis and degradation alterations, and the role of protective chaperone activities in the process of myosin loss. Altered mechano-signalling seems involved in triggering a major part of myosin loss in experimental CIM models, and passive loading of muscle potently ameliorates the CIM phenotype. We provide a systematic overview of similarities and distinct differences in the signalling pathways involved in triggering muscle atrophy in CIM and isolated trigger factors. As preferential myosin loss is mostly determined from biochemistry analyses providing no spatial resolution of myosin loss processes within myofibres, we also provide first results monitoring myosin signal intensities during experimental ICU intervention using multi-photon Second Harmonic Generation microscopy. Our results confirm that myosin loss is an evenly distributed process within myofibres rather than being confined to hot spots.
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Affiliation(s)
- O. Friedrich
- Institute of Medical Biotechnology; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
- Erlangen Graduate School in Advanced Optical Technologie (SAOT); Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
| | - S. Diermeier
- Institute of Medical Biotechnology; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
- Erlangen Graduate School in Advanced Optical Technologie (SAOT); Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
| | - L. Larsson
- Department of Physiology & Pharmacology; Karolinska Institutet; Stockholm Sweden
- Section of Clinical Neurophysiology; Department of Clinical Neuroscience; Karolinska Institutet; Stockholm Sweden
- Department of Biobehavioral Health; The Pennsylvania State University; University Park PA USA
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16
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Gulliksson H, Meinke S, Ravizza A, Larsson L, Höglund P. Storage of red blood cells in a novel polyolefin blood container: a pilotin vitrostudy. Vox Sang 2016; 112:33-39. [DOI: 10.1111/vox.12472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Revised: 09/15/2016] [Accepted: 10/12/2016] [Indexed: 11/28/2022]
Affiliation(s)
- H. Gulliksson
- Department of Clinical Immunology and Transfusion Medicine; Karolinska University Hospital; Stockholm Sweden
- Karolinska Institutet; Stockholm Sweden
| | - S. Meinke
- Department of Clinical Immunology and Transfusion Medicine; Karolinska University Hospital; Stockholm Sweden
- Karolinska Institutet; Stockholm Sweden
| | | | | | - P. Höglund
- Department of Clinical Immunology and Transfusion Medicine; Karolinska University Hospital; Stockholm Sweden
- Karolinska Institutet; Stockholm Sweden
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17
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Parini P, Pramfalk C, Ahmed O, Larsson L, Karpe F, Neville M, Eriksson M. Soat2 depletion improves insulin sensitivity and hepatic steatosis. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Larsson L, Decker AM, Nibali L, Pilipchuk SP, Berglundh T, Giannobile WV. Regenerative Medicine for Periodontal and Peri-implant Diseases. J Dent Res 2015; 95:255-66. [PMID: 26608580 DOI: 10.1177/0022034515618887] [Citation(s) in RCA: 157] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The balance between bone resorption and bone formation is vital for maintenance and regeneration of alveolar bone and supporting structures around teeth and dental implants. Tissue regeneration in the oral cavity is regulated by multiple cell types, signaling mechanisms, and matrix interactions. A goal for periodontal tissue engineering/regenerative medicine is to restore oral soft and hard tissues through cell, scaffold, and/or signaling approaches to functional and aesthetic oral tissues. Bony defects in the oral cavity can vary significantly, ranging from smaller intrabony lesions resulting from periodontal or peri-implant diseases to large osseous defects that extend through the jaws as a result of trauma, tumor resection, or congenital defects. The disparity in size and location of these alveolar defects is compounded further by patient-specific and environmental factors that contribute to the challenges in periodontal regeneration, peri-implant tissue regeneration, and alveolar ridge reconstruction. Efforts have been made over the last few decades to produce reliable and predictable methods to stimulate bone regeneration in alveolar bone defects. Tissue engineering/regenerative medicine provide new avenues to enhance tissue regeneration by introducing bioactive models or constructing patient-specific substitutes. This review presents an overview of therapies (e.g., protein, gene, and cell based) and biomaterials (e.g., resorbable, nonresorbable, and 3-dimensionally printed) used for alveolar bone engineering around teeth and implants and for implant site development, with emphasis on most recent findings and future directions.
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Affiliation(s)
- L Larsson
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontology, Institute of Odontology, University of Gothenburg, Gothenburg, Sweden
| | - A M Decker
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - L Nibali
- Periodontology Unit and Department of Clinical Research, UCL Eastman Dental Institute, London, UK
| | - S P Pilipchuk
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
| | - T Berglundh
- Department of Periodontology, Institute of Odontology, University of Gothenburg, Gothenburg, Sweden
| | - W V Giannobile
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Biomedical Engineering, College of Engineering, University of Michigan, Ann Arbor, MI, USA
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19
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Martins MD, Jiao Y, Larsson L, Almeida LO, Garaicoa-Pazmino C, Le JM, Squarize CH, Inohara N, Giannobile WV, Castilho RM. Epigenetic Modifications of Histones in Periodontal Disease. J Dent Res 2015; 95:215-22. [PMID: 26496800 DOI: 10.1177/0022034515611876] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Periodontitis is a chronic infectious disease driven by dysbiosis, an imbalance between commensal bacteria and the host organism. Periodontitis is a leading cause of tooth loss in adults and occurs in about 50% of the US population. In addition to the clinical challenges associated with treating periodontitis, the progression and chronic nature of this disease seriously affect human health. Emerging evidence suggests that periodontitis is associated with mechanisms beyond bacteria-induced protein and tissue degradation. Here, we hypothesize that bacteria are able to induce epigenetic modifications in oral epithelial cells mediated by histone modifications. In this study, we found that dysbiosis in vivo led to epigenetic modifications, including acetylation of histones and downregulation of DNA methyltransferase 1. In addition, in vitro exposure of oral epithelial cells to lipopolysaccharides resulted in histone modifications, activation of transcriptional coactivators, such as p300/CBP, and accumulation of nuclear factor-κB (NF-κB). Given that oral epithelial cells are the first line of defense for the periodontium against bacteria, we also evaluated whether activation of pathogen recognition receptors induced histone modifications. We found that activation of the Toll-like receptors 1, 2, and 4 and the nucleotide-binding oligomerization domain protein 1 induced histone acetylation in oral epithelial cells. Our findings corroborate the emerging concept that epigenetic modifications play a role in the development of periodontitis.
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Affiliation(s)
- M D Martins
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Oral Pathology, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Y Jiao
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Pathology and Comprehensive Cancer Center, The University of Michigan Medical School, Ann Arbor, MI, USA
| | - L Larsson
- Department of Periodontology, Institute of Odontology, University of Gothenburg, Sweden
| | - L O Almeida
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - C Garaicoa-Pazmino
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - J M Le
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - C H Squarize
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - N Inohara
- Department of Pathology and Comprehensive Cancer Center, The University of Michigan Medical School, Ann Arbor, MI, USA
| | - W V Giannobile
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - R M Castilho
- Laboratory of Epithelial Biology, University of Michigan School of Dentistry, Ann Arbor, MI, USA Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
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20
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Friedrich O, Reid MB, Van den Berghe G, Vanhorebeek I, Hermans G, Rich MM, Larsson L. The Sick and the Weak: Neuropathies/Myopathies in the Critically Ill. Physiol Rev 2015; 95:1025-109. [PMID: 26133937 PMCID: PMC4491544 DOI: 10.1152/physrev.00028.2014] [Citation(s) in RCA: 216] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Critical illness polyneuropathies (CIP) and myopathies (CIM) are common complications of critical illness. Several weakness syndromes are summarized under the term intensive care unit-acquired weakness (ICUAW). We propose a classification of different ICUAW forms (CIM, CIP, sepsis-induced, steroid-denervation myopathy) and pathophysiological mechanisms from clinical and animal model data. Triggers include sepsis, mechanical ventilation, muscle unloading, steroid treatment, or denervation. Some ICUAW forms require stringent diagnostic features; CIM is marked by membrane hypoexcitability, severe atrophy, preferential myosin loss, ultrastructural alterations, and inadequate autophagy activation while myopathies in pure sepsis do not reproduce marked myosin loss. Reduced membrane excitability results from depolarization and ion channel dysfunction. Mitochondrial dysfunction contributes to energy-dependent processes. Ubiquitin proteasome and calpain activation trigger muscle proteolysis and atrophy while protein synthesis is impaired. Myosin loss is more pronounced than actin loss in CIM. Protein quality control is altered by inadequate autophagy. Ca(2+) dysregulation is present through altered Ca(2+) homeostasis. We highlight clinical hallmarks, trigger factors, and potential mechanisms from human studies and animal models that allow separation of risk factors that may trigger distinct mechanisms contributing to weakness. During critical illness, altered inflammatory (cytokines) and metabolic pathways deteriorate muscle function. ICUAW prevention/treatment is limited, e.g., tight glycemic control, delaying nutrition, and early mobilization. Future challenges include identification of primary/secondary events during the time course of critical illness, the interplay between membrane excitability, bioenergetic failure and differential proteolysis, and finding new therapeutic targets by help of tailored animal models.
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Affiliation(s)
- O Friedrich
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany; College of Health and Human Performance, University of Florida, Gainesville, Florida; Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio; and Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Clinical Neurophysiology, Karolinska Institutet, Stockholm, Sweden
| | - M B Reid
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany; College of Health and Human Performance, University of Florida, Gainesville, Florida; Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio; and Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Clinical Neurophysiology, Karolinska Institutet, Stockholm, Sweden
| | - G Van den Berghe
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany; College of Health and Human Performance, University of Florida, Gainesville, Florida; Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio; and Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Clinical Neurophysiology, Karolinska Institutet, Stockholm, Sweden
| | - I Vanhorebeek
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany; College of Health and Human Performance, University of Florida, Gainesville, Florida; Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio; and Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Clinical Neurophysiology, Karolinska Institutet, Stockholm, Sweden
| | - G Hermans
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany; College of Health and Human Performance, University of Florida, Gainesville, Florida; Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio; and Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Clinical Neurophysiology, Karolinska Institutet, Stockholm, Sweden
| | - M M Rich
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany; College of Health and Human Performance, University of Florida, Gainesville, Florida; Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio; and Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Clinical Neurophysiology, Karolinska Institutet, Stockholm, Sweden
| | - L Larsson
- Institute of Medical Biotechnology, Department of Chemical and Biological Engineering, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany; College of Health and Human Performance, University of Florida, Gainesville, Florida; Clinical Department and Laboratory of Intensive Care Medicine, Division of Cellular and Molecular Medicine, KU Leuven, Leuven, Belgium; Department of Neuroscience, Cell Biology and Physiology, Wright State University, Dayton, Ohio; and Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Clinical Neurophysiology, Karolinska Institutet, Stockholm, Sweden
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Tiselius HG, Larsson L. Hourly urate excretion in patients with calcium oxalate stone disease. Contrib Nephrol 2015; 37:36-40. [PMID: 6713877 DOI: 10.1159/000408546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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22
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Cacciani N, Ogilvie H, Larsson L. Structural and functional effects of mechanical ventilation and aging on single rat diaphragm muscle fibers. Crit Care 2015. [PMCID: PMC4470934 DOI: 10.1186/cc14330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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23
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Markowicz P, Löndahl J, Wierzbicka A, Suleiman R, Shihadeh A, Larsson L. A study on particles and some microbial markers in waterpipe tobacco smoke. Sci Total Environ 2014; 499:107-13. [PMID: 25181042 PMCID: PMC4297659 DOI: 10.1016/j.scitotenv.2014.08.055] [Citation(s) in RCA: 23] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 07/29/2014] [Accepted: 08/19/2014] [Indexed: 05/21/2023]
Abstract
Waterpipe smoking is becoming increasingly popular worldwide. Research has shown that cigarette smoke, in addition to hundreds of carcinogenic and otherwise toxic compounds, may also contain compounds of microbiological origin. In the present study we analyzed waterpipe smoke for some microbial compounds. Both of the two markers studied, viz 3-hydroxy fatty acids of bacterial lipopolysaccharide (LPS) and ergosterol of fungal biomass, were found in waterpipe tobacco, in amounts similar as previously found in cigarette tobacco, and in smoke. Waterpipe mainstream smoke contained on average 1800 pmol LPS and 84.4 ng ergosterol produced per session. An average concentration of 2.8 pmol/m(3) of LPS was found in second hand smoke during a 1-2-h waterpipe smoking session while ergosterol was not detected; corresponding concentrations from smoking five cigarettes were 22.2 pmol/m(3) of LPS and 87.5 ng/m(3) of ergosterol. This is the first time that waterpipe smoking has been shown to create a bioaerosol. In the present study we also found that waterpipe smoking generated several polycyclic aromatic hydrocarbons, carbon monoxide, and high fraction of small (<200 nm) particles that may have adverse effects on human health upon inhalation.
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Affiliation(s)
- P Markowicz
- Lund University, Department of Laboratory Medicine, Division of Medical Microbiology, Sölvegatan 23, SE-22362 Lund, Sweden
| | - J Löndahl
- Division of Ergonomics and Aerosol Technology, Lund University, P.O. Box 118, SE-221 00, Lund, Sweden
| | - A Wierzbicka
- Division of Ergonomics and Aerosol Technology, Lund University, P.O. Box 118, SE-221 00, Lund, Sweden
| | - R Suleiman
- Mechanical Engineering Department, American University of Beirut, Beirut, Lebanon
| | - A Shihadeh
- Mechanical Engineering Department, American University of Beirut, Beirut, Lebanon
| | - L Larsson
- Lund University, Department of Laboratory Medicine, Division of Medical Microbiology, Sölvegatan 23, SE-22362 Lund, Sweden.
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Thorbert-Mros S, Larsson L, Berglundh T. Cellular composition of long-standing gingivitis and periodontitis lesions. J Periodontal Res 2014; 50:535-43. [PMID: 25330403 DOI: 10.1111/jre.12236] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND OBJECTIVE Insufficient information on the cellular composition of long-standing gingivitis lesions without signs of attachment loss makes an understanding of differences in cellular composition between "destructive" and "nondestructive" periodontal lesions difficult. The aim of the current study was to analyze differences in cell characteristics between lesions representing long-standing gingivitis and severe periodontitis. MATERIAL AND METHODS Two groups of patients were recruited. One group consisted of 36 patients, 33-67 years of age, with severe generalized periodontitis (periodontitis group). The second group consisted of 28 patients, 41-70 years of age, with overt signs of gingival inflammation but no attachment loss (gingivitis group). From each patient a gingival biopsy was obtained from one selected diseased site and prepared for immunohistochemical analysis. RESULTS Periodontitis lesions were twice as large and contained significantly larger proportions, numbers and densities of cells positive for CD138 (plasma cells) and CD68 (macrophages) than did gingivitis lesions. The proportion of B cells that expressed the additional CD5 marker (B-1a cells) was significantly larger in periodontitis lesions than in gingivitis lesions. The densities of T cells and B cells did not differ between periodontitis lesions and gingivitis lesions. T cells were not the dominating cell type in gingivitis lesions, as B cells together with their subset plasma cells comprised a larger number and proportion than T cells. CONCLUSION Periodontitis lesions at teeth with advanced attachment and bone loss exhibit quantitative and qualitative differences in relation to gingivitis lesions at teeth with no attachment and bone loss. It is suggested that the large number and high density of plasma cells are the hallmarks of advanced periodontitis lesions and the most conspicuous difference in relation to long-standing gingivitis lesions.
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Affiliation(s)
- S Thorbert-Mros
- Department of Periodontology, Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - L Larsson
- Department of Periodontology, Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - T Berglundh
- Department of Periodontology, Institute of Odontology, The Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
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25
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Kannisto K, Rehnmark S, Slätis K, Webb P, Larsson L, Gåfvels M, Eggertsen G, Parini P. The thyroid receptor β modulator GC-1 reduces atherosclerosis in ApoE deficient mice. Atherosclerosis 2014; 237:544-54. [PMID: 25463087 DOI: 10.1016/j.atherosclerosis.2014.09.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 08/26/2014] [Accepted: 09/30/2014] [Indexed: 12/11/2022]
Abstract
Thyroid hormone reduces plasma cholesterol and increases expression of low-density lipoprotein receptor (LDL-R) in liver, an effect mediated by thyroid receptor β (TRβ). The selective TRβ modulator GC-1 also enhances several steps in reverse cholesterol transport and can decrease serum cholesterol independently of LDL-R. To test whether GC-1 reduces atherosclerosis and to determine which mechanisms are active, we treated ApoE deficient mice with atherogenic diet ± GC-1. GC-1 reduced cholesteryl esters in aorta after 20 weeks. Serum free and esterified cholesterol were reduced after 1 and 10 weeks, but not 20 weeks. Hepatic bile acid synthesis and LDL-R expression was elevated after 1, 10 and 20 weeks, without changes in hepatic de novo cholesterol synthesis. GC-1 increased faecal neutral sterols and reduced serum campesterol after 1 week, indicating reduced intestinal cholesterol absorption. After 20 weeks, GC-1 increased faecal bile acids, but not faecal neutral sterols. Hepatic scavenger receptor B1 (SR-B1) expression was decreased by GC-1. We conclude that GC-1 delays the onset of atherosclerosis in ApoE deficient mice. Since ApoE is needed for hepatic cholesterol reabsorption by LDL-R, this supports the idea that GC-1 reduces serum cholesterol independently of LDL-R by increasing hepatic bile acid synthesis. GC-1 lipid-lowering effects in ApoE deficient mice may also be partly due to reduced intestinal cholesterol absorption. Since reductions in serum cholesterol are reversed at longer times, these GC-1 dependent effects may not be enough for sustained cholesterol reduction in long term treatments.
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Affiliation(s)
- K Kannisto
- Division of Clinical Chemistry, Department of Laboratory Medicine Karolinska Institutet, Stockholm, Sweden
| | - S Rehnmark
- Axcentua Pharmaceuticals AB, Huddinge, Sweden
| | - K Slätis
- Division of Clinical Chemistry, Department of Laboratory Medicine Karolinska Institutet, Stockholm, Sweden
| | - P Webb
- Houston Methodist Research Institute, Houston, TX, USA
| | - L Larsson
- Division of Clinical Chemistry, Department of Laboratory Medicine Karolinska Institutet, Stockholm, Sweden
| | - M Gåfvels
- Division of Clinical Chemistry, Department of Laboratory Medicine Karolinska Institutet, Stockholm, Sweden
| | - G Eggertsen
- Division of Clinical Chemistry, Department of Laboratory Medicine Karolinska Institutet, Stockholm, Sweden
| | - P Parini
- Division of Clinical Chemistry, Department of Laboratory Medicine Karolinska Institutet, Stockholm, Sweden.
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Mulvey F, Zemblys R, Larsson L, Holmqvist K. Clarifying the validity of eye movement measures from various eye tracker types; a systematic study of data quality, event detection algorithms and filters. J Vis 2014. [DOI: 10.1167/14.10.755] [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: 11/24/2022] Open
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Corpeno R, Dworkin B, Cacciani N, Salah H, Bergman HM, Ravara B, Vitadello M, Gorza L, Gustafson AM, Hedström Y, Petersson J, Feng HZ, Jin JP, Iwamoto H, Yagi N, Artemenko K, Bergquist J, Larsson L. Time course analysis of mechanical ventilation-induced diaphragm contractile muscle dysfunction in the rat. J Physiol 2014; 592:3859-80. [PMID: 25015920 DOI: 10.1113/jphysiol.2014.277962] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Controlled mechanical ventilation (CMV) plays a key role in triggering the impaired diaphragm muscle function and the concomitant delayed weaning from the respirator in critically ill intensive care unit (ICU) patients. To date, experimental and clinical studies have primarily focused on early effects on the diaphragm by CMV, or at specific time points. To improve our understanding of the mechanisms underlying the impaired diaphragm muscle function in response to mechanical ventilation, we have performed time-resolved analyses between 6 h and 14 days using an experimental rat ICU model allowing detailed studies of the diaphragm in response to long-term CMV. A rapid and early decline in maximum muscle fibre force and preceding muscle fibre atrophy was observed in the diaphragm in response to CMV, resulting in an 85% reduction in residual diaphragm fibre function after 9-14 days of CMV. A modest loss of contractile proteins was observed and linked to an early activation of the ubiquitin proteasome pathway, myosin:actin ratios were not affected and the transcriptional regulation of myosin isoforms did not show any dramatic changes during the observation period. Furthermore, small angle X-ray diffraction analyses demonstrate that myosin can bind to actin in an ATP-dependent manner even after 9-14 days of exposure to CMV. Thus, quantitative changes in muscle fibre size and contractile proteins are not the dominating factors underlying the dramatic decline in diaphragm muscle function in response to CMV, in contrast to earlier observations in limb muscles. The observed early loss of subsarcolemmal neuronal nitric oxide synthase activity, onset of oxidative stress, intracellular lipid accumulation and post-translational protein modifications strongly argue for significant qualitative changes in contractile proteins causing the severely impaired residual function in diaphragm fibres after long-term mechanical ventilation. For the first time, the present study demonstrates novel changes in the diaphragm structure/function and underlying mechanisms at the gene, protein and cellular levels in response to CMV at a high temporal resolution ranging from 6 h to 14 days.
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Affiliation(s)
- R Corpeno
- Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Sweden Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - B Dworkin
- Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Sweden Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden Pennsylvania State University College of Medicine, Hershey, PA, USA
| | - N Cacciani
- Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Sweden Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - H Salah
- Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Sweden Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - H-M Bergman
- Department of Chemistry-Biomedical Center, Analytical Chemistry and SciLifeLab, Uppsala University, Sweden
| | - B Ravara
- Department of Biomedical Sciences, University of Padova, Italy
| | - M Vitadello
- Department of Biomedical Sciences, University of Padova, Italy CNR-Institute of Neuroscience, Padova section, Italy
| | - L Gorza
- Department of Biomedical Sciences, University of Padova, Italy
| | - A-M Gustafson
- Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Sweden
| | - Y Hedström
- Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Sweden Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - J Petersson
- Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Sweden
| | - H-Z Feng
- Department of Physiology, Wayne State University, Detroit, MI, USA
| | - J-P Jin
- Department of Physiology, Wayne State University, Detroit, MI, USA
| | - H Iwamoto
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun, Hyogo, Japan
| | - N Yagi
- Japan Synchrotron Radiation Research Institute, Sayo-cho, Sayo-gun, Hyogo, Japan
| | - K Artemenko
- Department of Chemistry-Biomedical Center, Analytical Chemistry and SciLifeLab, Uppsala University, Sweden
| | - J Bergquist
- Department of Chemistry-Biomedical Center, Analytical Chemistry and SciLifeLab, Uppsala University, Sweden
| | - L Larsson
- Department of Neuroscience, Clinical Neurophysiology, Uppsala University, Sweden Department of Physiology and Pharmacology, Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
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Elf K, Shevchenko G, Larsson L, Nygren I, Bergquist J, Askmark H, Artemenko K. P919: Proteomic analysis of muscle tissue from patients with motorneuron disease and controls. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50954-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Qaisar R, Larsson L. What determines myonuclear domain size? Indian J Physiol Pharmacol 2014; 58:1-12. [PMID: 25464670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The muscle cell is multinuclear and each nucleus controls transcriptional activity in the surrounding territory of cytoplasm called myonuclear domain (MND). MND size varies with the fiber type and is inversely proportional to the muscle fiber oxidative capacity. Change in MND size precedes change in myonuclei count during post-natal growth and most conditions of muscle fiber hypertrophy, suggesting that the myonuclei have the ability to enhance their synthetic capacity according to cell size, functional and metabolic needs. MND size has a "ceiling" limit during hypertrophic process beyond which extra myonuclei are donated by satellite cell to support further muscle growth. During ageing-related atrophy, myonuclei are not lost but an unequal distribution is reported. Ageing myonucleus still responds to resistant exercise and hormone replacement therapy (HRT) by enhancing its transcriptional capacity. Thus the MND size is far from constant and modulates itself to contribute to the muscle remodeling in various conditions.
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Santos S, Baraibar M, Le Boulch M, Larsson L, Friguet B. Optimization of a proteomic approach for evidencing and identifying oxidized proteins during human skeletal muscle aging. Exp Gerontol 2013. [DOI: 10.1016/j.exger.2013.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lod S, Johansson T, Abrahamsson KH, Larsson L. The influence of epigenetics in relation to oral health. Int J Dent Hyg 2013; 12:48-54. [DOI: 10.1111/idh.12030] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2013] [Indexed: 12/20/2022]
Affiliation(s)
- S Lod
- Department of Periodontology; The Sahlgrenska Academy at University of Gothenburg; Göteborg Sweden
| | - T Johansson
- Department of Periodontology; The Sahlgrenska Academy at University of Gothenburg; Göteborg Sweden
| | - KH Abrahamsson
- Department of Periodontology; The Sahlgrenska Academy at University of Gothenburg; Göteborg Sweden
| | - L Larsson
- Department of Periodontology; The Sahlgrenska Academy at University of Gothenburg; Göteborg Sweden
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Jorns C, Takahashi T, Callaghan E, Zemack H, Larsson L, Nowak G, Parini P, Ericzon BG, Ellis E. Serum Apolipoprotein E as a Marker to Monitor Graft Function After Hepatocyte Transplantation in a Clinically Relevant Mouse Model. Transplant Proc 2013; 45:1780-6. [DOI: 10.1016/j.transproceed.2013.01.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 01/15/2013] [Indexed: 10/26/2022]
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Sandri M, Barberi L, Bijlsma AY, Blaauw B, Dyar KA, Milan G, Mammucari C, Meskers CGM, Pallafacchina G, Paoli A, Pion D, Roceri M, Romanello V, Serrano AL, Toniolo L, Larsson L, Maier AB, Muñoz-Cánoves P, Musarò A, Pende M, Reggiani C, Rizzuto R, Schiaffino S. Signalling pathways regulating muscle mass in ageing skeletal muscle. The role of the IGF1-Akt-mTOR-FoxO pathway. Biogerontology 2013; 14:303-23. [DOI: 10.1007/s10522-013-9432-9] [Citation(s) in RCA: 237] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Accepted: 05/03/2013] [Indexed: 11/29/2022]
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Ramamurthy B, Larsson L. Detection of an aging-related increase in advanced glycation end products in fast- and slow-twitch skeletal muscles in the rat. Biogerontology 2013; 14:293-301. [PMID: 23681254 DOI: 10.1007/s10522-013-9430-y] [Citation(s) in RCA: 20] [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] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 04/29/2013] [Indexed: 01/23/2023]
Abstract
Glycation, a non-enzymatic addition of reducing sugars to ε-amino groups of proteins, is a post-translational modification that results in the formation of irreversible advanced glycation end products (AGEs). Ageing related decline in myofibrillar protein function is effected by a number of structural and functional modifications including glycation. Functional properties of skeletal muscles, such as maximum velocity of unloaded shortening, are known to be profoundly affected by ageing at the motor unit, cellular and tissue levels. However, the contribution of protein modifications to a decline in muscle function is not well understood. In this study we measured AGEs of intracellular and sarcolemmal proteins, using an anti-AGE antibody in soleus (SOL) and extensor digiotorum longus (EDL) muscles of male and female rats of five different age groups. Using a fluorescent secondary antibody to visualize AGEs in the confocal microscope, we found that myosin is glycated in both fiber types in all age groups; an ageing related increase in AGEs was observed in both intracellular and sarcolemmal regions in all age groups, with the exception of sarcolemma of SOL (unchanged) and EDL (reduced) in female rats; the greatest concentration of AGEs was found intracellularly in the SOL of the oldest age group (27-30) of females. While an ageing related decline in motor properties can be partially attributed to the observed increase in myofibrillar protein glycation, our results also indicate that intracellular and the less well studied sarcolemmal protein modification likely contribute to an aging-related decline in muscle function. Further studies are required to establish a link between the observed ageing related increase in glycation and muscle function at the motor unit, cellular and tissue levels.
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Affiliation(s)
- B Ramamurthy
- Department of Biobehavioral Health, The Pennsylvania State University, University Park, PA, USA
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Szponar B, Pehrson C, Larsson L. Bacterial and fungal markers in tobacco smoke. Sci Total Environ 2012; 438:447-51. [PMID: 23026151 DOI: 10.1016/j.scitotenv.2012.08.067] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 08/16/2012] [Accepted: 08/17/2012] [Indexed: 06/01/2023]
Abstract
Previous research has demonstrated that cigarette smoke contains bacterial and fungal components including lipopolysaccharide (LPS) and ergosterol. In the present study we used gas chromatography-mass spectrometry to analyze tobacco as well as mainstream and second hand smoke for 3-hydroxy fatty acids (3-OH FAs) of 10 to 18 carbon chain lengths, used as LPS markers, and ergosterol, used as a marker of fungal biomass. The air concentrations of LPS were 0.0017 n mol/m(3) (N=5) and 0.0007/m(3) (N=6) in the smoking vs. non-smoking rooms (p=0.0559) of the studied private houses, and 0.0231 n mol/m(3) (N=5) vs. 0.0006 n mol/m(3) (N=5) (p=0.0173), respectively, at the worksite. The air concentrations of ergosterol were also significantly higher in rooms with ongoing smoking than in rooms without smoking. A positive correlation was found between LPS and ergosterol in rooms with smoking but not in rooms without smoking. 3-OH C14:0 was the main 3-OH FA, followed by 3-OH C12:0, both in mainstream and second hand smoke and in phenol:water smoke extracts prepared in order to purify the LPS. The Limulus activity of the phenolic phase of tobacco was 3900 endotoxin units (EU)/cigarette; the corresponding amount of the smoke, collected on filters from 8 puffs, was 4 EU/cigarette. Tobacco smoking has been associated with a range of inflammatory airway conditions including COPD, asthma, bronchitis, alveolar hypersensitivity etc. Significant levels of LPS and ergosterol were identified in tobacco smoke and these observations support the hypothesis that microbial components of tobacco smoke contribute to inflammation and airway disease.
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Affiliation(s)
- B Szponar
- Lund University, Dept. of Laboratory Medicine, Sölvegatan 23, 223 62 Lund, Sweden.
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Fang Y, Larsson L, Bruhns P, Xiang Z. Apoptosis of mouse mast cells is reciprocally regulated by the IgG receptors FcγRIIB and FcγRIIIA. Allergy 2012; 67:1233-40. [PMID: 22845035 DOI: 10.1111/j.1398-9995.2012.02878.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/22/2012] [Indexed: 11/30/2022]
Abstract
BACKGROUND Mast cells are important effector cells in allergy. They usually have a long life span and resist cell death induction. Fcγ receptor- and IgG immune complex-mediated apoptosis has been demonstrated in B-lineage cells, but not in mast cells. The aim of the current study was to investigate whether mast cells could respond to apoptosis induction by IgG immune complex aggregation of Fcγ receptors. It is known that mouse mast cells express the low-affinity Fcγ receptors FcγRIIB and FcγRIIIA, which bind IgG especially in the form of antigen-IgG immune complexes. METHODS Mouse bone marrow-derived cultured mast cells were examined for surface expression of FcγRIIB and FcγRIIIA. Apoptosis of such cells from wild-type, FcγRIIB(-/-) or FcγRIIIA(-/-) mice was measured following receptor aggregation by IgG immune complexes. RESULTS Our data demonstrate that aggregation of either FcγRIIB or FcγRIIIA by IgG immune complexes induced apoptosis of mouse bone marrow-derived cultured mast cells. However, mast cells expressing both FcγRIIB and FcγRIIIA were able to resist cell death induction by IgG immune complexes. CONCLUSION Our findings reveal a fine-tuning system for regulating mast cell apoptosis through aggregating Fcγ receptors by IgG immune complexes. Such apoptosis regulation may have a substantial impact on mast cell homeostasis during allergic inflammation.
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Affiliation(s)
- Y Fang
- Department of Microbiology and Immunology, Affiliated Hospital of Guiyang Medical College, Guiyang, China
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Abstract
BACKGROUND Mast cells are important effector cells in allergy. They usually have a long life span and resist cell death induction. Fcγ receptor- and IgG immune complex-mediated apoptosis has been demonstrated in B-lineage cells, but not in mast cells. The aim of the current study was to investigate whether mast cells could respond to apoptosis induction by IgG immune complex aggregation of Fcγ receptors. It is known that mouse mast cells express the low-affinity Fcγ receptors FcγRIIB and FcγRIIIA, which bind IgG especially in the form of antigen-IgG immune complexes. METHODS Mouse bone marrow-derived cultured mast cells were examined for surface expression of FcγRIIB and FcγRIIIA. Apoptosis of such cells from wild-type, FcγRIIB(-/-) or FcγRIIIA(-/-) mice was measured following receptor aggregation by IgG immune complexes. RESULTS Our data demonstrate that aggregation of either FcγRIIB or FcγRIIIA by IgG immune complexes induced apoptosis of mouse bone marrow-derived cultured mast cells. However, mast cells expressing both FcγRIIB and FcγRIIIA were able to resist cell death induction by IgG immune complexes. CONCLUSION Our findings reveal a fine-tuning system for regulating mast cell apoptosis through aggregating Fcγ receptors by IgG immune complexes. Such apoptosis regulation may have a substantial impact on mast cell homeostasis during allergic inflammation.
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Affiliation(s)
- Y Fang
- Department of Microbiology and Immunology, Affiliated Hospital of Guiyang Medical College, Guiyang, China
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Täubel M, Sulyok M, Vishwanath V, Bloom E, Turunen M, Järvi K, Kauhanen E, Krska R, Hyvärinen A, Larsson L, Nevalainen A. Co-occurrence of toxic bacterial and fungal secondary metabolites in moisture-damaged indoor environments. Indoor Air 2011; 21:368-375. [PMID: 21585551 DOI: 10.1111/j.1600-0668.2011.00721.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
UNLABELLED Toxic microbial secondary metabolites have been proposed to be related to adverse health effects observed in moisture-damaged buildings. Initial steps in assessing the actual risk include the characterization of the exposure. In our study, we applied a multi-analyte tandem mass spectrometry-based methodology on sample materials of severely moisture-damaged homes, aiming to qualitatively and quantitatively describe the variety of microbial metabolites occurring in building materials and different dust sample types. From 69 indoor samples, all were positive for at least one of the 186 analytes targeted and as many as 33 different microbial metabolites were found. For the first time, the presence of toxic bacterial metabolites and their co-occurrence with mycotoxins were shown for indoor samples. The bacterial compounds monactin, nonactin, staurosporin and valinomycin were exclusively detected in building materials from moist structures, while chloramphenicol was particularly prevalent in house dusts, including settled airborne dust. These bacterial metabolites are highly bioactive compounds produced by Streptomyces spp., a group of microbes that is considered a moisture damage indicator in indoor environments. We show that toxic bacterial metabolites need to be considered as being part of very complex and diverse microbial exposures in 'moldy' buildings. PRACTICAL IMPLICATIONS Bacterial toxins co-occur with mycotoxins in moisture-damaged indoor environments. These compounds are measurable also in settled airborne dust, indicating that inhalation exposure takes place. In attempts to characterize exposures to microbial metabolites not only mycotoxins but also bacterial metabolites have to be targeted by the analytical methods applied. We recommend including analysis of samples of outdoor air in the course of future indoor assessments, in an effort to better understand the outdoor contribution to the indoor presence of microbial toxins. There is a need for a sound risk assessment concerning the exposure to indoor microbial toxins at concentrations detectable in moisture-damaged indoor environments.
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Affiliation(s)
- M Täubel
- Department of Environmental Health, National Institute for Health and Welfare, Kuopio, Finland.
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Larsson L, Laska M. Ultra-high olfactory sensitivity for the human sperm-attractant aromatic aldehyde bourgeonal in CD-1 mice. Neurosci Res 2011; 71:355-60. [PMID: 21893110 DOI: 10.1016/j.neures.2011.08.009] [Citation(s) in RCA: 14] [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] [Received: 05/09/2011] [Revised: 07/27/2011] [Accepted: 08/16/2011] [Indexed: 11/15/2022]
Abstract
Recent studies have shown that certain aromatic aldehydes are ligands for olfactory receptors expressed in mammalian sperm cells and induce sperm chemotaxis. Using a conditioning paradigm, the olfactory sensitivity of five CD-1 mice for seven aromatic aldehydes was investigated. With all seven stimuli, the mice discriminated concentrations as low as 0.01 ppm (parts per million) from the solvent, and with bourgeonal the animals even detected concentrations as low as 0.1 ppq (parts per quadrillion) which constitutes the lowest olfactory detection threshold value reported in this species so far. The presence of a tertiary butyl group in para-position (relative to the functional aldehyde group) combined with a lack of an additional alkyl group next to the functional aldehyde group may be responsible for the extraordinary sensitivity of the mice for bourgeonal.
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Affiliation(s)
- Linda Larsson
- IFM Biology, Section of Zoology, Linköping University, 58183 Linköping, Sweden
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Li M, Li M, Marx JO, Larsson L. There is no slowing of motility speed with increased body size in rat, human, horse and rhinoceros independent on temperature and skeletal muscle myosin isoform. Acta Physiol (Oxf) 2011; 202:671-81. [PMID: 21554558 DOI: 10.1111/j.1748-1716.2011.02292.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM The predictions of scaling of skeletal muscle shortening velocity made by A.V. Hill 60-years ago have proven to be remarkably accurate at the cellular level. The current investigation looks to extend the study of scaling of contractile speed to the level of the molecular motor protein myosin at both physiological and unphysiological low temperatures. METHODS A single muscle cell in vitro motility assay to test myosin function, i.e. myosin extracted from short single muscle fibre segments, was used in four species representing a 5 500-fold difference in body mass (rat, man, horse and rhinoceros) at temperatures ranging from 15 to 35 °C. RESULTS The in vitro motility speed increased as the temperature of the assay increased, but a more profound effect was observed on the slower isoforms, narrowing the relative differences between fast and slow myosin heavy chain (MyHC) isoforms at physiological temperature in all species. The in vitro motility speed varied according to MyHC isoform within each species: I < IIa < IIx < IIb, but the expected scaling relationship within orthologous myosin isoforms was not observed at any temperature. CONCLUSION The scaling effect of body size and limb length on shortening velocity at the muscle fibre level, i.e. the decreasing shortening velocity associated with increasing body weight and limb length, was not confirmed at the motor protein level when including mammals of very large size. Thus, other factors than myosin structure and function appear to cause this scaling effect and thin filament isoform expression or myofilament lattice spacing are forwarded as alternative underlying factors.
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Affiliation(s)
- M Li
- Department of Clinical Neurophysiology, Uppsala University Hospital, Sweden
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Pedrelli M, Davoodpour P, Degirolamo C, Gomaraschi M, Larsson L, Rudel L, Calabresi L, Gustafsson J, Steffensen K, Eriksson M, Parini P. 175 THE INHIBITION OF HEPATIC ACYL COENZYME A:CHOLESTEROL ACYLTRANSFERASE (ACAT) 2 POSITIVELY AFFECTS HDL METABOLISM AND FUNCTIONALITY IN MICE. ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70176-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Roos K, Simark-Mattsson C, Grahn Håkansson E, Larsson L, Sandberg T, Ahrén C. Can probiotic lactobacilli eradicate persistent carriage of meticillin-resistant Staphylococcus aureus? J Hosp Infect 2011; 78:77-8. [PMID: 21371778 DOI: 10.1016/j.jhin.2011.01.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2010] [Accepted: 01/05/2011] [Indexed: 11/18/2022]
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Abstract
We hypothesized that tobacco smoke induces alterations to the 3-OH fatty acids present in lipid A in a manner consistent with a microflora of reduced inflammatory potential. Whole saliva samples and full-mouth clinical periodontal recordings were obtained from persons with (22 smokers; 15 non-smokers) and without (14 smokers; 15 non-smokers) chronic periodontitis. Clear differences in the contributions of multiple saturated 3-OH fatty acid species were noted in the group with disease compared with healthy individuals. Increases in the long-chain fatty acids associated with anaerobic bacterial periodontopathogens, particularly 3-OH-C(i17.0) (146.7%, relative to controls), were apparent. Significant reductions in the 3-OH fatty acids associated with the consensus (high potency) enteric LPS structure (3-OH-C(12.0) and 3-OH-C(14.0); 33.3% and 15.8% reduction, respectively) were noted in smokers compared with non-smokers with chronic periodontitis. Thus, smoking is associated with specific structural alterations to the lipid-A-derived 3-OH fatty acid profile in saliva that are consistent with an oral microflora of reduced inflammatory potential. These findings provide much-needed mechanistic insight into the established clinical conundrum of increased infection with periodontal pathogens but reduced clinical inflammation in smokers.
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Affiliation(s)
- N Buduneli
- Department of Periodontology, School of Dentistry, Ege University, İzmir, Turkey
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Ahren C, Andersson M, Forsell M, Helldahl L, Karami N, Larsson L, Moore E, Welinder-Olsson C. P20.07 Investigation and control of an outbreak with CTX-M-15-producing E. coli of sequence types 131 and 1441 in a neonatal surgical ward. J Hosp Infect 2010. [DOI: 10.1016/s0195-6701(10)60206-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Arendrup M, Bergmann O, Larsson L, Nielsen H, Jarløv J, Christensson B. Detection of candidaemia in patients with and without underlying haematological disease. Clin Microbiol Infect 2010; 16:855-62. [DOI: 10.1111/j.1469-0691.2009.02931.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Elmroth I, Fox A, Holst O, Larsson L. Detection of bacterial contamination in cultures of eucaryotic cells by gas chromatography-mass spectrometry. Biotechnol Bioeng 2010; 42:421-9. [PMID: 18613045 DOI: 10.1002/bit.260420404] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The use of gas chromatography-mass spectrometry for early detection of bacterial contaminations in cultures of baker's yeast, Penicillium chrysogenum, and an animal cell line was evaluated; muramic acid and characteristic cellular fatty acids were used as analytes. By analyzing branched-chain and cyclopropane-substituted fatty acids as methyl esters, Staphylococcus epidermidis, Bacillus subtilis, Lactobacillus reuteri, Enterobacter cloacae, and Pseudomonas fluorescens were detected in a 500-fold excess (w/w) of baker's yeast; the amounts injected corresponded to 300 ng (dry mass) of the bacteria. Contamination with Bacillus was detected in cultures of Penicillium chrysogenum and animal cells by analyzing muramic acid, both as its alditol acetate derivative, using electron impact ionization, and its trifluoroacetyl methyl glycoside derivative, using negative ion-chemical ionization. The trifluoroacetylated derivative was detected in injected amounts corresponding to 1 x 10(3) bacterial cells in the contaminated animal cell line, whereas amounts corresponding to 1 x 10(5) bacteria were required for detection of the alditol acetate derivative; the amounts in the original samples were 5 x 10(5) and 5 x 10(6), respectively. However, the alditol acetate method exhibited lower chemical interferences than the trifluoroacetyl methyl glycoside procedure. The results show the potential of using gas chromatographic-mass spectrometric analysis of cellular constituents for the detection of bacterial contaminations in eucaryotic cultures as an alternative to conventional microbiological methods.
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Affiliation(s)
- I Elmroth
- Department of Technical Analytical Chemistry, Lund University, Chemical Center, Lund, Sweden
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Webster CS, Larsson L, Frampton CM, Weller J, McKenzie A, Cumin D, Merry AF. Clinical assessment of a new anaesthetic drug administration system: a prospective, controlled, longitudinal incident monitoring study. Anaesthesia 2010; 65:490-9. [PMID: 20337616 DOI: 10.1111/j.1365-2044.2010.06325.x] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A safety-orientated system of delivering parenteral anaesthetic drugs was assessed in a prospective incident monitoring study at two hospitals. Anaesthetists completed an incident form for every anaesthetic, indicating if an incident occurred. Case mix data were collected and the number of drug administrations made during procedures estimated. From February 1998 at Hospital A and from June 1999 at Hospital B, until November 2003, 74,478 anaesthetics were included, for which 59,273 incident forms were returned (a 79.6% response rate). Fewer parenteral drug errors occurred with the new system than with conventional methods (58 errors in an estimated 183,852 drug administrations (0.032%, 95% CI 0.024-0.041%) vs 268 in 550,105 (0.049%, 95% CI 0.043-0.055%) respectively, p = 0.002), a relative reduction of 35% (difference 0.017%, 95% CI 0.006-0.028%). No major adverse outcomes from these errors were reported with the new system while 11 (0.002%) were reported with conventional methods (p = 0.055). We conclude that targeted system re-design can reduce medical error.
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Affiliation(s)
- C S Webster
- Centre for Medical and Health Sciences Education, Department of Anaesthesiology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
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Larsson L, Finnström O, Nilsson B, Öhman S. Evaluation of Radiometer ICA1 as a routine instrument for serum ionized calcium and its application for whole blood capillary samples from newborn infants. Scandinavian Journal of Clinical and Laboratory Investigation 2010. [DOI: 10.1080/00365518309169075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Larsson L, Rymo L, Berglundh T. Sp1 binds to the G allele of the−1087 polymorphism in the IL-10 promoter and promotes IL-10 mRNA transcription and protein production. Genes Immun 2010; 11:181-7. [DOI: 10.1038/gene.2009.103] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Elmroth I, Valeur A, Odham G, Larsson L. Detection of microbial contamination in fermentation processes: mass spectrometric determination of gram-negative bacteria in Leuconostoc mesenteroides cultures. Biotechnol Bioeng 2009; 35:787-92. [PMID: 18592579 DOI: 10.1002/bit.260350806] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [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
Gas chromatography/mass spectrometry was used to detect the presence of Enterobacter cloacae in cultures of Leuconostoc mesenteroides, an organism used in an industrial process for production of dextrane. The penta-fluorobenzoyl-methyl ester derivative of 3-hydroxy-myristic acid, a characteristic compound of gram-negative bacteria, was used as the analyte. By using gas chromatography/mass spectrometry with selected ion monitoring, E. cloacae was determined over the range of 1 ppm to 1% in cultures of L. mesenteroides. The proposed analytical approach represents a useful alternative to conventional methods for determining contaminating organisms in industrial fermentation processes.
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Affiliation(s)
- I Elmroth
- Department of Technical Analytical Chemistry, University of Lund, Chemical Center, Box 124, 221 00 Lund, Sweden
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