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Lindqvist C, Slinde F, Majeed A, Wahlin S. Nutrition impact symptoms affects quality of life and nutritional status in patients with chronic liver disease. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1270] [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: 10/28/2022]
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Nordstedt P, Lindqvist C, Nowak G. MON-LB320: Indirect Calorimetry After Liver Transplantation is Needed to Ensure the Rightamount of Energy Supplied. Clin Nutr 2017. [DOI: 10.1016/s0261-5614(17)31106-8] [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: 11/15/2022]
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Lindqvist C, Majeed A, Wahlin S. Body composition assessed by dual-energy X-ray absorptiometry predicts early infectious complications after liver transplantation. J Hum Nutr Diet 2016; 30:284-291. [PMID: 27709718 DOI: 10.1111/jhn.12417] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND It is challenging to identify malnutrition, which is a risk factor for poor outcome in patients with liver cirrhosis. In the present study, we aimed to investigate the prevalence of malnutrition among patients listed for liver transplantation, as assessed by different methods, and also to relate dual-energy X-ray absorptiometry (DXA) to short-term post-transplant outcomes. METHODS In this retrospective cohort study, we reviewed the medical records of 106 patients who underwent liver transplantation in 2009-2012. Body composition was assessed by the fat-free mass index (FFMI) and fat mass index (FMI) obtained using DXA. Severe infections within 1 month, length of stay in intensive care unit and length of hospital stay were endpoints of primary interest. RESULTS The prevalence of malnutrition was 2-20% depending on sex and the assessment method. Thirty-nine (37%) patients developed severe infections within 1 month after liver transplantation. In multivariate analysis with logistic regression, body composition was significantly associated with post-operative infection when measured with FFMI (P = 0.043) but not with FMI (P = 0.087). Post-operative dialysis (P = 0.004) and post-operative infections (P < 0.001) were significantly associated with length of stay in hospital. Post-operative bleeding (P = 0.015), duration of mechanical ventilation (P < 0.001) and the need for dialysis (P < 0.001), but not body composition, were significant predictors of the length of stay in the intensive care unit. CONCLUSIONS The prevalence of malnutrition depends on assessment method. FFMI is an independent predictor for early post-transplant infections. Body composition measured by DXA during the pretransplant evaluation provides valuable information about nutritional status in patients with liver cirrhosis.
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Affiliation(s)
- C Lindqvist
- Department of Clinical Nutrition and Dietetics, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - A Majeed
- Department of Gastroenterology and Hepatology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden.,Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - S Wahlin
- Department of Gastroenterology and Hepatology, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
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Lindqvist C, Brismar T, Majeed A, Wahlin S. OR04: Muscle Mass Depletion Measured with CT Compared with DXA in Predicting Outcome after Liver Transplantation. Clin Nutr 2016. [DOI: 10.1016/s0261-5614(16)30243-6] [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: 10/21/2022]
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Lindqvist C, Majeed A, Wahlin S. MON-PP044: Nutrition Impact Symptoms in Patients Listed for Liver Transplantation. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30476-3] [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: 11/26/2022]
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Abstract
This paper explores the role of the L1 and the L2 in L3 oral production, both as regards lexicon and syntax. Previous research has shown that both L1 and L2 are used in L3 oral production, and different explanatory factors have been put forward, e.g. (psycho)typology and L2 status. However, these factors do not explain why function words tend to come from L2 while content words seem to be transferred from both L1 and L2 to a larger extent. In order to explain transfer patterns in L3, we use the declarative/procedural model (Paradis 2009), and hypothesize that syntactic transfer will come from L2; transfer of function words from L2; and transfer of content words from both L1 and L2. We analyze lexical and syntactic transfer in eleven native German speakers’ retellings of an episode from a mute video film. The results largely seem to support Paradis’ model.
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Wiig Ø, Heide-Jørgensen MP, Lindqvist C, Laidre KL, Postma LD, Dueck L, Palsbøll PJ, Bachmann L. Recaptures of genotyped bowhead whales Balaena mysticetus in eastern Canada and West Greenland. ENDANGER SPECIES RES 2011. [DOI: 10.3354/esr00365] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Abstract
Broad-nosed pipefish Syngnathus typhle were used to investigate whether males used scent in their search for mates. When the males in an experiment had access to olfactory cues only, they did not locate females better than they located males. Thus, S. typhle, was less successful in mate search when visual cues were absent.
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Affiliation(s)
- C Lindqvist
- Department of Biology, Gotland University, SE-621 67 Visby, Sweden.
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Carlsson M, Larsson-Faria S, Behrens K, Lindqvist C, Buttler K, Keeler S, Sjölander A, Thorell L, Eriksson P. Variability of Total and Free IgE and IgE Receptor Expression in Allergic Subjects in and out of an Allergen Season. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.839] [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: 11/24/2022]
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Thorén H, Numminen L, Snäll J, Kormi E, Lindqvist C, Iizuka T, Törnwall J. Occurrence and types of dental injuries among patients with maxillofacial fractures. Int J Oral Maxillofac Surg 2010; 39:774-8. [DOI: 10.1016/j.ijom.2010.03.024] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2009] [Revised: 01/26/2010] [Accepted: 03/16/2010] [Indexed: 10/19/2022]
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Kuhlefelt M, Laine P, Suominen-Taipale L, Ingman T, Lindqvist C, Thorén H. Risk factors contributing to symptomatic miniplate removal: a retrospective study of 153 bilateral sagittal split osteotomy patients. Int J Oral Maxillofac Surg 2010; 39:430-5. [DOI: 10.1016/j.ijom.2010.01.016] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2008] [Revised: 09/12/2009] [Accepted: 01/20/2010] [Indexed: 11/29/2022]
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Helenius LMJ, Hallikainen D, Helenius I, Meurman JH, Koskimies S, Tervahartiala P, Kivisaari L, Hietanen J, Suuronen R, Lindqvist C, Leirisalo-Repo M. HLA‐DRB1* alleles and temporomandibular joint erosion in patients with various rheumatic diseases. Scand J Rheumatol 2009; 33:24-9. [PMID: 15124939 DOI: 10.1080/03009740310004603] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To investigate the association between HLA antigens and temporomandibular joint (TMJ) erosion, salivary composition, and focal sialadenitis in patients with rheumatic diseases. METHODS Eighty-four patients, 24 with rheumatoid arthritis (RA), 19 with mixed connective tissue disease (MCTD), 19 with ankylosing spondylitis (AS), and 22 with spondyloarthropathy (SPA) were studied. Each patient underwent clinical examination of the masticatory system, unstimulated and stimulated saliva collection, and minor salivary gland biopsy. Radiographs (OPTG) of the TMJ were obtained, and HLA allele (A, B, C and DRB1*) analysis was performed. Erosion in OPTG was scored from 0 (no erosion) to 4 (condyles totally eroded). In the analysis, scores 0-2 were grouped as normal or mild changes, and scores 3-4 as distinct erosions. One hundred healthy blood donors served as controls for HLA typing. RESULTS Distinct erosion of the TMJ in OPTG was observed in 22 (27%) patients. It affected four (17%) of the 24 patients with RA, three (17%) of the 18 with MCTD, seven (37%) of the 19 patients with AS and eight (38%) of the 21 with SPA non-significant (NS). The mean erosion scores were 1.7 for RA, 1.3 for MCTD, 2.5 for SPA, and 1.6 for AS patients [probability (p) = 0.04]. The frequency of HLA-B27 antigen was higher in the AS and SPA patients, and that of HLA-DRB1*04 allele higher in RA patients than in control subjects. In the whole patient population, HLA-DRB1*01 allele was significantly associated with erosions 16/36 (44%) versus 6/46 (131%1) (p = 0.0014). In the SPA group, patients with HLA-DRBI*01 allele had a significantly higher occurrence of distinct erosions than patients without this allele [8/10 (80%) versus 0/11 (0%) (p = 0.0002)], whereas DRB1*06 was protective [0/8 (0%) versus 8/13 (62%) (p = 0.018)]. HLA-DRB1*04 was associated with increased salivary IgG in the RA patients. CONCLUSION HLA antigens are significantly associated with the development of destructive lesions in the TMJ, as well as composition of saliva in patients with various rheumatic diseases.
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Affiliation(s)
- L M J Helenius
- Department of Oral and Maxillofacial Diseases, Helsinki University Central Hospital, Helsinki, Finland.
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Vardouli L, Lindqvist C, Vlahou K, Loskog ASI, Eliopoulos AG. Adenovirus delivery of human CD40 ligand gene confers direct therapeutic effects on carcinomas. Cancer Gene Ther 2009; 16:848-60. [PMID: 19461675 DOI: 10.1038/cgt.2009.31] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
CD40, a tumor necrosis factor receptor family member, is an emerging target for cancer therapy being best appreciated as an important regulator of the anti-tumor immune response. In this study, we report the development of a replication-defective recombinant adenovirus (RAd) vector expressing human CD40 ligand (RAd-hCD40L) and show that sustained engagement of the CD40 pathway in malignant cells results in direct anti-proliferative and pro-apoptotic effects. Thus, transduction of CD40-positive bladder, cervical and ovarian carcinoma cell lines with RAd-hCD40L potently inhibits their proliferation in vitro, whereas CD40-negative lines remain unresponsive. RAd-hCD40L is also found to be superior to recombinant CD40L in inducing carcinoma cell death and in amplifying the cytotoxic effects of the chemotherapeutic agents 5-fluorouracil, cis-platin and mitomycin C. Soluble CD40L is produced by RAd-hCD40L transduced carcinoma cells but unlike other soluble tumor necrosis factor family ligands, it does not interfere with the death-promoting activity of its membrane-bound form. In a mouse xenograft tumor model bearing a human bladder carcinoma, intratumoral delivery of RAd-hCD40L suppresses cancer growth. These findings highlight the potential of exploiting the CD40 pathway in carcinomas using CD40L gene transfer alone or in combination with other modalities for cancer therapy. Our results have also broader implications in understanding the multifaceted anti-tumor activities of the CD40 pathway in carcinomas, which thus offer an attractive option for future clinical application.
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Affiliation(s)
- L Vardouli
- Molecular and Cellular Biology Laboratory, Division of Basic Sciences, University of Crete Medical School, Heraklion, Crete 71003, Greece
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Thorén H, Snäll J, Kormi E, Numminen L, Fäh R, Iizuka T, Lindqvist C, Törnwall J. Does perioperative glucocorticosteroid treatment correlate with disturbance in surgical wound healing after treatment of facial fractures? Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.326] [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: 10/20/2022]
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Lindqvist C, Lind J, Jensen P. Effects of domestication on food deprivation-induced behaviour in red junglefowl, Gallus gallus, and White Leghorn layers. Anim Behav 2009. [DOI: 10.1016/j.anbehav.2008.12.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lindqvist C, Jensen P. Domestication and stress effects on contrafreeloading and spatial learning performance in red jungle fowl (Gallus gallus) and White Leghorn layers. Behav Processes 2009; 81:80-4. [PMID: 19429200 DOI: 10.1016/j.beproc.2009.02.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Revised: 02/12/2009] [Accepted: 02/16/2009] [Indexed: 10/21/2022]
Abstract
White Leghorn layers (WL) show modified foraging strategies, compared to their ancestor, the red jungle fowl (RJF). Birds selected for high production may invest more resources into production traits and less in other biological processes. This may affect the capacity to adapt to new or variable environments. Thirty birds of each of RJF and WL were raised in a stressful environment (unpredictable light:dark schedule) and 30 control animals of each breed in similar pens, but on a 12:12h light:dark schedule. We studied the differences between breed and treatment with respect to contrafreeloading (CFL), spatial learning ability and the birds' behaviour in a T-maze. WL showed less CFL, were less cautious in the test arena and showed an impaired spatial learning ability compared with RJF in both test situations. Stress impaired spatial learning in both breeds, but stressed RJF showed a more active response to the test situation than non-stressed RJF, by starting to eat faster, while stressed WL prolonged their time to start eating compared to non-stressed WL.Our results may reflect different adaptive strategies, where RJF appear better adapted to an unpredictable environment.
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Mesimäki K, Lindroos B, Törnwall J, Mauno J, Lindqvist C, Kontio R, Miettinen S, Suuronen R. Novel maxillary reconstruction with ectopic bone formation by GMP adipose stem cells. Int J Oral Maxillofac Surg 2009; 38:201-9. [PMID: 19168327 DOI: 10.1016/j.ijom.2009.01.001] [Citation(s) in RCA: 359] [Impact Index Per Article: 23.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2008] [Accepted: 01/06/2009] [Indexed: 12/13/2022]
Abstract
Microvascular reconstruction is the state-of-the-art in many fields of defect surgery today. Currently, reconstruction of large bony defects involves harvesting of autologous bone causing donor site morbidity and risk of infection. Specifically, utilizing autologous adipose stem cells (autoASCs), large quantities of cells can be retrieved for cell therapy applications and the risk of tissue rejection is diminished. The authors describe the first case report of a microvascular custom-made ectopic bone flap employing good manufacturing practice (GMP) level ASCs. The patient underwent a hemimaxillectomy due to a large keratocyst. After 36 months of follow-up, the defect was reconstructed with a microvascular flap using autoASCs, beta-tricalcium phosphate and bone morphogenetic protein-2. ASCs were isolated and expanded in clean room facilities according to GMP standards and were characterized in vitro. After 8 months of follow-up, the flap had developed mature bone structures and vasculature and was transplanted into the defect area. Postoperative healing has been uneventful, and further rehabilitation with dental implants has been started. The in vitro characterization demonstrated multipotentiality and mesenchymal stem cell characteristics in ASCs. This is the first clinical case where ectopic bone was produced using autoASCs in microvascular reconstruction surgery and it will pave way for new clinical trials in the field.
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Affiliation(s)
- K Mesimäki
- Department of Oral and Maxillofacial Diseases, Helsinki University Central Hospital, Helsinki, Finland
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Lindqvist C, Jensen P. Effects of age, sex and social isolation on contrafreeloading in red junglefowl (Gallus gallus) and White Leghorn fowl. Appl Anim Behav Sci 2008. [DOI: 10.1016/j.applanim.2008.03.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Suuronen R, Mesimäki K, Numminen J, Törnwall J, Rautiainen M, Lindqvist C, Lindroos B, Miettinen S. O.631 Tissue engineered bone from adipose derived stem cells. J Craniomaxillofac Surg 2008. [DOI: 10.1016/s1010-5182(08)71755-4] [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: 10/21/2022] Open
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Seppänen L, Lemberg K, Lauhio A, Lindqvist C, Rautemaa R. P.161 Aetiology of odontogenic maxillofacial infections. J Craniomaxillofac Surg 2008. [DOI: 10.1016/s1010-5182(08)71949-8] [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: 10/21/2022] Open
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Kirkden RD, Lindqvist C, Jensen P. Effects of domestication on filial motivation and imprinting in chicks: comparison of red junglefowl and White Leghorns. Anim Behav 2008. [DOI: 10.1016/j.anbehav.2008.02.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kuhlefelt M, Thoren H, Lindqvist C, Laine P. Reasons for mini-plate removal following bilateral sagittal split osteotomy. Int J Oral Maxillofac Surg 2007. [DOI: 10.1016/j.ijom.2007.09.054] [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: 10/22/2022]
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Helenius M, Laine P, Lindqvist C, Leirisalo-Repo M. Five-year study of patients with rheumatoid arthritis and temporomandibular joint changes. Int J Oral Maxillofac Surg 2007. [DOI: 10.1016/j.ijom.2007.08.405] [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: 10/22/2022]
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Lindqvist C, Janczak AM, Nätt D, Baranowska I, Lindqvist N, Wichman A, Lundeberg J, Lindberg J, Torjesen PA, Jensen P. Transmission of stress-induced learning impairment and associated brain gene expression from parents to offspring in chickens. PLoS One 2007; 2:e364. [PMID: 17426812 PMCID: PMC1838921 DOI: 10.1371/journal.pone.0000364] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2007] [Accepted: 03/20/2007] [Indexed: 01/23/2023] Open
Abstract
Background Stress influences many aspects of animal behaviour and is a major factor driving populations to adapt to changing living conditions, such as during domestication. Stress can affect offspring through non-genetic mechanisms, but recent research indicates that inherited epigenetic modifications of the genome could possibly also be involved. Methodology/Principal Findings Red junglefowl (RJF, ancestors of modern chickens) and domesticated White Leghorn (WL) chickens were raised in a stressful environment (unpredictable light-dark rhythm) and control animals in similar pens, but on a 12/12 h light-dark rhythm. WL in both treatments had poorer spatial learning ability than RJF, and in both populations, stress caused a reduced ability to solve a spatial learning task. Offspring of stressed WL, but not RJF, raised without parental contact, had a reduced spatial learning ability compared to offspring of non-stressed animals in a similar test as that used for their parents. Offspring of stressed WL were also more competitive and grew faster than offspring of non-stressed parents. Using a whole-genome cDNA microarray, we found that in WL, the same changes in hypothalamic gene expression profile caused by stress in the parents were also found in the offspring. In offspring of stressed WL, at least 31 genes were up- or down-regulated in the hypothalamus and pituitary compared to offspring of non-stressed parents. Conclusions/Significance Our results suggest that, in WL the gene expression response to stress, as well as some behavioural stress responses, were transmitted across generations. The ability to transmit epigenetic information and behaviour modifications between generations may therefore have been favoured by domestication. The mechanisms involved remain to be investigated; epigenetic modifications could either have been inherited or acquired de novo in the specific egg environment. In both cases, this would offer a novel explanation to rapid evolutionary adaptation of a population.
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Affiliation(s)
| | - Andrew M. Janczak
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, Ås, Norway
| | - Daniel Nätt
- IFM Biology, Linköping University, Linköping, Sweden
| | | | | | - Anette Wichman
- Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Skara, Sweden
| | - Joakim Lundeberg
- School of Biotechnology, Department of Gene Technology, Royal Institute of Technology, Stockholm, Sweden
| | - Johan Lindberg
- School of Biotechnology, Department of Gene Technology, Royal Institute of Technology, Stockholm, Sweden
| | | | - Per Jensen
- IFM Biology, Linköping University, Linköping, Sweden
- * To whom correspondence should be addressed. E-mail:
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Asikainen AJ, Hagström J, Sorsa T, Noponen J, Kellomäki M, Juuti H, Lindqvist C, Hietanen J, Suuronen R. Soft tissue reactions to bioactive glass 13-93 combined with chitosan. J Biomed Mater Res A 2007; 83:530-7. [PMID: 17508414 DOI: 10.1002/jbm.a.31225] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The aim of this study was to evaluate rabbit soft tissue reactions to bioactive glass 13-93 mesh by using a histological and immunohistochemical analysis. Bioactive glass (13-93) mesh fixed with 3 wt % chitosan was implanted into the dorsal subcutaneous space of New Zealand White rabbits (n=18) for six, 12, and 24 weeks, respectively. After 6 weeks the bioactive glass remnants were surrounded by foreign-body granuloma with eosinophilic granulocytes. After 12 and 24 weeks the implanted material was mainly absorbed, but, if any particles still remained the foreign-body reaction was notably milder. Yet, a mild chronic inflammatory infiltrate was present. Matrix metalloproteinase (MMP) -2, -3, -13 and tissue inhibitory protein (TIMP-1 and -2) expressions were studied by immunohistochemistry. MMP-3, -13, TIMP-1, and -2 positivity were detected throughout the follow-up period. MMP-2 positivity was only occasionally seen in the 24 week samples, which is constitutively expressed but is not related to inductive MMP-3 and -13 cascade. The presence of eosinophilic granulocytes in some of the samples raises the possibility of an allergic reaction to the materials. MMP-3 and -13 are suggested to participate in the host reaction to either bioactive glass or chitosan.
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Affiliation(s)
- A J Asikainen
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Helsinki, Helsinki, and REGEA-Institute for Regenerative Medicine, Tampere University Hospital, Finland.
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Helenius LMJ, Tervahartiala P, Helenius I, Al-Sukhun J, Kivisaari L, Suuronen R, Kautiainen H, Hallikainen D, Lindqvist C, Leirisalo-Repo M. Clinical, radiographic and MRI findings of the temporomandibular joint in patients with different rheumatic diseases. Int J Oral Maxillofac Surg 2006; 35:983-9. [PMID: 17052893 DOI: 10.1016/j.ijom.2006.08.001] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2005] [Revised: 03/03/2006] [Accepted: 08/04/2006] [Indexed: 11/27/2022]
Abstract
The aim of this study was to investigate the condition of the temporomandibular joint (TMJ) in patients with different rheumatic diseases, and report correlations between the clinical, radiographic and magnetic resonance imaging (MRI) findings. The 67 patients were divided into four groups: 16 with rheumatoid arthritis (RA), 15 with mixed connective tissue disease (MCTD), 18 with ankylosing spondylitis (AS) and 18 with spondyloarthropathy (SPA). They were clinically examined, and panoramic tomography, lateral panoramic radiography and MRI of the TMJ were performed. MRI showed reduced articular cartilage in 25% (4/16) of RA, 0% (0/15) of MCTD, 17% (3/18) of AS and 17% (3/18) of SPA patients. Condylar changes included erosion, osteophytes and abnormal shape. Disc alterations included perforation, abnormal anterior position and decreased movement. These abnormalities were most frequent in RA patients, and least frequent in MCTD and SPA patients. Crepitation and reduced maximum opening of the mouth correlated with abnormalities of the disc and articular cartilage as shown by MRI. Severe condylar erosion in panoramic tomograms significantly correlated with MRI findings of condylar erosion (P<0.01), diminished thickness of condylar cartilage, abnormal condylar shape, and abnormal shape of the temporal surface of the TMJ (P< or =0.001). The presence of crepitation, limited mandibular movement and/or pain on movement of the jaw often indicated structural damage to the TMJ. Panoramic radiographs provide an alternative method to MRI but, to obtain a more detailed anatomic picture, MRI is recommended for patients with acute unexplained pain or as part of preoperative work up. A panoramic recording is not indicated when MRI is planned.
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Affiliation(s)
- L M J Helenius
- Departments of Oral and Maxillofacial Diseases, Helsinki University Hospital, Helsinki, Finland.
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Seppänen L, Suuronen R, Lindqvist C, Rautemaa R. P.139 Odontogenic infections requiring hospital care. J Craniomaxillofac Surg 2006. [DOI: 10.1016/s1010-5182(06)60646-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: 10/23/2022] Open
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Ekholm M, Helander P, Hietanen J, Lindqvist C, Salo A, Kellomäki M, Suuronen R. A histological and immunohistochemical study of tissue reactions to solid poly(ortho ester) in rabbits. Int J Oral Maxillofac Surg 2006; 35:631-5. [PMID: 16540288 DOI: 10.1016/j.ijom.2006.01.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2004] [Revised: 10/25/2005] [Accepted: 01/27/2006] [Indexed: 11/21/2022]
Abstract
In many cases only the temporary presence of a biomaterial is needed in tissue support, augmentation or replacement. In such cases biodegradable materials are better alternatives than biostable ones. At present, biodegradable polymers are widely used in the field of maxillofacial surgery as sutures, fracture fixation devices and as absorbable membranes. The most often used polymers are aliphatic polyesters, such as polyglycolic acid (PGA) and polylactic acid (PLA). Poly(ortho ester) is a surface eroding polymer, which has been under development since 1970, but is used mostly in drug delivery systems in semisolid form. The aim of this study was to evaluate the tissue reactions of solid poly(ortho ester) (POE), histologically and immunohistochemically. Resorption times and the effect of 2 different sterilization methods (gamma radiation and ethylene oxide) upon resorption were also evaluated. Material was implanted into the tibia and subcutaneously into the mandibular ramus area of 24 rabbits. Follow-up times were 1-10, 14 and 24 weeks. Histological studies showed that POE induces a moderate inflammation in soft tissue and in bone. At 24 week follow-up, inflammation was mild in soft tissue and moderate in bone. In immunohistochemical studies, no highly fluorescent layer of tenascin or fibronectin was found adjacent to the implant. Resorption of gamma-sterilized rods was faster than ethylene oxide-sterilized rods. The total resorption time was more than 24 weeks in both groups. Clinically the healing was uneventful and the implants the well tolerated by the living tissue. This encourages these authors to continue studies with this interesting new material to search for the ideal material for bone filling and fracture fixation.
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Affiliation(s)
- M Ekholm
- Department of Oral and Maxillofacial Surgery, Helsinki University Central Hospital, Helsinki, Finland.
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Ekholm M, Hietanen J, Tulamo RM, Muhonen J, Lindqvist C, Kellomäki M, Suuronen R. The copolymer of epsilon-caprolactone-lactide and tricalcium phosphate does not enhance bone growth in mandibular defect of sheep. J Mater Sci Mater Med 2006; 17:139-45. [PMID: 16502246 DOI: 10.1007/s10856-006-6817-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2005] [Accepted: 06/28/2005] [Indexed: 05/06/2023]
Abstract
In the field of craniomaxillofacial and orthopaedic surgery there is a constant need for bone or bone substitute. At the present, the most effective way to enhance bone healing clinically is to use autogenous bone grafts. The problems associated with the use of these autografts are donor site morbidity, limited supply and need for a second operative site. Currently there are several different synthetic products commercially available in the market; nevertheless, none of them is ideal for filling bone defects. Therefore, search for new synthetic materials for bone replacement is necessary. A mixture of tricalcium phosphate (TCP) and epsilon-caprolactone-lactide copolymer P(epsilon -CL/DL-LA) was prepared and implanted in critical size mandibular bone defects in twelve sheep. Contralateral side was used as a control. Follow-up times for histological and radiological studies were 9, 14, 24 and 52 weeks. We found that the implanted material did not enhance bone formation compared to control site. We also confirmed that defect size was of critical size, since there was no complete healing of the control site either. The results do not encourage us to continue our studies with the mixture of TCP and P(epsilon-CL/DL-LA) as a filling material for bone defects. Therefore the search for the ideal material is still ongoing.
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Affiliation(s)
- M Ekholm
- Department of Oral and Maxillofacial Surgery, Helsinki University Central Hospital, Finland
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31
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Kontio R, Ruuttila P, Lindroos L, Suuronen R, Salo A, Lindqvist C, Virtanen I, Konttinen YT. Biodegradable polydioxanone and poly(l/d)lactide implants: an experimental study on peri-implant tissue response. Int J Oral Maxillofac Surg 2005; 34:766-76. [PMID: 15979853 DOI: 10.1016/j.ijom.2005.04.027] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2002] [Revised: 04/01/2005] [Accepted: 04/14/2005] [Indexed: 10/25/2022]
Abstract
Several implants for orbital wall fracture treatment are available at the present, but they have drawbacks: resorption, risk for migration and foreign body reaction. Alloplastic resorbable implants would be advantageous: no removal operation and no donor side morbidity. The purpose of this study was to evaluate the foreign body reaction, capsule formation and mechanical properties of two bioresorbable implants. PDS and SR-P(L/DL)LA mesh sheet (70/30) with solid frame (96/4) implants (SR-P(L/DL)LA 70,96) were placed into subcutaneous tissue of 24 rats. Immunohistochemistry was used to evaluate reactivity for Tn-C, alpha-actin, type I and III collagens and two mononuclear cells: T-cells and monocyte/ macrophage. GPC, DSC and SEM were performed. Student's t-test or nonparametric Kruskall-Wallis test were used for statistical analysis. Histology of peri-implant capsule exhibited an inner cell-rich zone and an outer connective tissue zone around both materials. Tn-C reactivity was high in the inner and alpha-actin in the outer zone. At the end of the study, the difference of type I collagen versus type III collagen reactivity in inner zone was statistically significant (P<0.0001) as was the difference of type I collagen versus type III collagen reactivity in outer zone (P<0.0001). Immunohistochemistry did not reveal any statistical differences of T-cell and monocyte/macrophage reactivity around PDS versus SR-P(L/DL)LA 70,96 implants, nor any differences as a function of time. PDS were deformed totally after 2 months. SR-P(L/DL)LA 70,96 implants were only slightly deformed during the follow up of 7 months. PDS degraded rapidly in SEM observation. Particles were detaching from surface. SEM observation revealed that polylactide implant was degrading from the surface and the inner porous core became visible. The degradation came visible at 7 months. There were cracks in perpendicular direction towards to the long axis of the filaments. M(w) of PDS decreased fast compared to the polylactide implant. Foreign body reaction was minimal to both materials but continued throughout the whole observation period. Mechanically PDS was poor, it looses its shape totally within 2 months. It cannot be recommended for orbital wall reconstruction. New mesh sheet-frame structure (SR-P(L/DL)LA 70,96) approved to be mechanically adequate for orbital wall reconstruction. It seems not to possess intrinsic memory and retains its shape. The resorption time is significantly longer compared to PDS and is comparable to other studied P(L/DL)LA copolymers. Thus, the new polylactide copolymer implant may support the orbital contents long enough to give way to bone growth over the wall defect.
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Affiliation(s)
- R Kontio
- Department of Oral and Maxillofacial Surgery, Helsinki University Hospital, P.O. Box 263, Huch, Helsinki 00029, Finland.
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Asikainen AJ, Noponen J, Mesimäki K, Laitinen O, Peltola J, Pelto M, Kellomäki M, Ashammakhi N, Lindqvist C, Suuronen R. Tyrosine derived polycarbonate membrane is useful for guided bone regeneration in rabbit mandibular defects. J Mater Sci Mater Med 2005; 16:753-8. [PMID: 15965746 DOI: 10.1007/s10856-005-2613-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2004] [Accepted: 12/17/2004] [Indexed: 05/03/2023]
Abstract
Standardized bilateral through-and-through defects (12x6 mm) were created extraorally in the mandibular angle of 18 New Zealand White rabbits. Animals were divided in to three groups (n=6) according to the intended healing time. On the left side, defects were covered with a poly(desaminotyrosyl-tyrosine-ethyl ester carbonate) (PDTE carbonate) membrane wrapped around the inferior border of the mandible and fixed with bioabsorbable sutures. On the right side, the defects were filled with a mesh made of bioactive glass 13-93 and 3 wt% chitosan. The defects were covered with the same membranes. Periosteal flap was sutured over the membrane. Radiographically, bone ingrowth was seen in all specimens at 12 weeks postoperatively. At 24 weeks, completely ossified area remained approximately at the same level as at 12 weeks, but the non-ossified area decreased to almost zero. However, the bioactive glass mesh did not improve the results. Nevertheless, enveloping the defect with PDTE carbonate membrane seemed to play a crucial role in new bone formation. Based on these results, we conclude that tyrosine polycarbonate is a promising new material for guided bone regeneration.
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Affiliation(s)
- A J Asikainen
- Department of Oral and Maxillofacial Surgery, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
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Väisänen J, Lindqvist C, Jensen P. Co-segregation of behaviour and production related traits in an F3 intercross between red junglefowl and White Leghorn laying hens. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.livprodsci.2004.10.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Ketola T, Laine P, Lindqvist C, Suuronen R. Bioabsorbable plates and screws in the fixation of mandibular fractures. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81512-7] [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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35
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Ketola T, Laine P, Kontio R, Ashammakhi N, Lindqvist C, Suuronen R. Do bioabsorbable plates provide enough stability for mandibular access osteotomies in cancer patients? Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81486-9] [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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36
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Al-Sukhun J, Kontio R, Lindqvist C. Simulation of orbital deformation following a blunt injury using finite element analysis method. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81511-5] [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: 11/30/2022]
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37
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Ekholm M, Hietanen J, Lindqvist C, Kellomäki M, Suuronen R. A mixture of epsilon-caprolactone-lactide copolymer and tricalciumphosphate does not enhance bone growth in mandibular defect of sheep. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81358-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: 10/24/2022]
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38
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Al-Sukhun J, Kontio R, Lindqvist C. Bioresorbable poly-L/DL-lactide [P(L/DL)LA 70/30] plates are reliable for repairing of large inferior orbital wall bony defects: A pilot study. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81021-5] [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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39
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Laine P, Kontio R, Lindqvist C, Suuronen R. Are there any complications with bioabsorbable fixation devices? A 10 year review in orthognathic surgery. Int J Oral Maxillofac Surg 2004; 33:240-4. [PMID: 15287306 DOI: 10.1006/ijom.2003.0510] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Bioabsorbable fixation devices have been used in our departments between November 1991 and November 2001 in orthognathic surgery. The aim of this retrospective study was to assess all complications experienced during this time period, when we have operated 163 patients who have undergone 329 orthognathic osteotomies fixated with bioresorbable devices. No postoperative intermaxillary fixation was used. Light guiding elastics were used for 5 to 7 weeks. Patients' acceptance was generally excellent and very few complications occurred during this follow-up of 10 years. The complications were minor and did not affect the end results of the operations. Minor complications occurred in 14 patients (8.6%). Only one patient (0.6%) had a postoperative infection with elevated infection parameters. The other minor complications consisted mainly of dehiscence of the wound and plate exposure together with granulation tissue in the operation field. The rest of the complications occurred in the beginning of our study, when large screw heads on top of the bone irritated the patient and had to be removed. Insufficient fixation resulted in open bite in three patients (1.8%) in the beginning of the trial use of new devices, which no longer are used. Based on our experience, bioresorbable devices are safe to be used in orthognathic procedures. However, there is a learning curve, as there is with all new methods introduced.
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Affiliation(s)
- P Laine
- Department of Oral and Maxillofacial Surgery, Helsinki University Central Hospital, PO Box 263, 00029 HUS, Finland
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40
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Kontio R, Suuronen R, Konttinen YT, Hallikainen D, Lindqvist C, Kommonen B, Kellomäki M, Kylmä T, Virtanen I, Laine P. Orbital floor reconstruction with poly-L/D-lactide implants: clinical, radiological and immunohistochemical study in sheep. Int J Oral Maxillofac Surg 2004; 33:361-8. [PMID: 15145039 DOI: 10.1016/j.ijom.2003.10.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/07/2003] [Indexed: 11/15/2022]
Abstract
In this study the reconstruction capacity of orbital wall in sheep was evaluated when poly-L/D-lactide (PLDLA96) implants were used for large blow-out defects in 18 sheep. The contralateral side, where the defects healed spontaneously, served as controls. The follow-up was 12, 16, 22 and 36 weeks. Healing was evaluated clinically, radiologically, histologically and immunohistochemically. Physiochemical properties of the implants were also studied. At first, the implants were surrounded by elastic capsules, which gradually ossified. At 36 weeks, 60% were still visible and deformed but surrounded by bone. Light microscopy revealed a low grade inflammatory reaction. Expression of Tn-c and cFn was intense throughout the study. Shear strength decreased gradually and was not measurable after 16 weeks. Crystallinity increased steadily from 1.5 to 29.30% and molecular weight decreased from 49,000 to 4186. In CT, the final bony defect was smaller in the reconstructed sides than in the controls. Based on this study it can be concluded that PLDLA96 implant provokes a local inflammation, which does not prevent bone healing. The deformation of the implant, however, indicates that this PLDLA96 plate is not suitable for orbital floor reconstruction.
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Affiliation(s)
- R Kontio
- Department of Oral and Maxillofacial Surgery, Helsinki University Hospital, P.O. Box 263, 00029 HUCH, Finland.
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Abstract
Oral amyloidosis is usually presented in the tongue and is often regarded as a paraneoplastic phenomenon. We present a rare case of primary local amyloidosis in the palate of an 80-year-old male. No simultaneous general illnesses or malignancies were detected in spite of extensive assessments by specialists in internal medicine.
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Affiliation(s)
- P Stoor
- Department of Oral and Maxillofacial Surgery, Helsinki University Central Hospital, P.O. Box 263, 00029 HUS, Finland
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42
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Rajasuo A, Nyfors S, Kanervo A, Jousimies-Somer H, Lindqvist C, Suuronen R. Bacteremia after plate removal and tooth extraction. Int J Oral Maxillofac Surg 2004; 33:356-60. [PMID: 15145038 DOI: 10.1016/j.ijom.2003.10.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2003] [Indexed: 11/30/2022]
Abstract
Our aim was to investigate the occurrence of bacteremia associated with removal of a semirigid osteosynthesis plate and an adjacent third molar. Ten patients with fixed mandibular angle fracture were bacteriologically sampled from the second molar's distal gingival pocket, from the third molar's extraction socket and from the osteosynthesis plate. Blood samples from the ante-cubital vein were taken 10 times until 30 min postoperatively. Established culture, isolation and identification methods for the bacterial species were used. Bacteremia was detected in 60% of the subjects, most frequently 1.5 min after removal of the plate (20%) and 1.5 and 5 min after extraction of the tooth (20%), but also 10 min (10%) and 30 min (10%) postoperatively. 13 different bacterial species or groups were isolated, mean 2.5 +/- 1.9 per bacteremia-positive subject. The majority (85%) were anaerobes with Actinomyces, Campylobacter and Lactobacillus species predominating. In all the blood culture-positive cases the corresponding species was also recovered from one or more of the oral samples. These results show that oral surgical procedures are associated with a high frequency of longstanding anaerobic bacteremia, which could be harmful in patients at risk.
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Affiliation(s)
- A Rajasuo
- Department of Oral and Maxillofacial Diseases, Mikkeli Central Hospital, Finland.
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43
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Tarvainen L, Suuronen R, Lindqvist C, Malila N. Is the incidence of oral and pharyngeal cancer increasing in Finland? An epidemiological study of 17 383 cases in 1953-1999. Oral Dis 2004; 10:167-72. [PMID: 15089927 DOI: 10.1046/j.1601-0825.2003.00999.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE The aim of this study was to describe the occurrence of oral and pharyngeal cancer in Finland over the last half century. MATERIALS AND METHODS The study included all lip, oral and pharyngeal cancer cases diagnosed in Finland and reported to the nation-wide Finnish Cancer Registry between 1953 and 1999. RESULTS The study comprised 17,383 new cancer cases: 11,666 in males and 5717 in females. Of these, 83% were squamous cell carcinomas. By the end of the study, 1999, the mean age at diagnosis had increased to 63 years for males and 67 for females. The age-adjusted incidence of oral and pharyngeal cancer decreased in males from 12.5 per 10(5) to 8.4 per 10(5) while it increased in females from 3.0 per 10(5) to 3.9 per 10(5). This was because of a decrease in lip cancer incidence in males, while the incidence of tongue, mouth and salivary gland cancers increased in both genders. The annual number of new oral cancer cases increased, however, in both genders. CONCLUSION The incidence of lip cancer decreased in males, probably because of a decrease in smoking and in outdoor work. The incidence of intra-oral cancers increased in both genders, possibly because of increased alcohol consumption.
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Affiliation(s)
- L Tarvainen
- Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Helsinki, Helsinki, Finland.
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44
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Valleala H, Montonen M, Lindqvist C, Kahn MF, Konttinen YT. [The unknown SAPHO]. Duodecim 2002; 116:1985-9. [PMID: 12017613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Affiliation(s)
- H Valleala
- HUS:n kirurginen sairaala, reumatologian toimiala 00130 Helsinki
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45
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Abstract
Biodegradable materials, mainly polymers and copolymers of polylactide and polyglycolide, are today routinely used as fixation materials in craniomaxillofacial surgery. Several research groups have shown that these materials can adequately fix osteotomies and fractures of the craniofacial skeleton. Although there are some differences between polymers, in general their biocompatibility is good. They gradually lose their strength, enabling the underlying bone to take up the stress. Secondary procedures for removal of the material causing discomfort and pain are not needed. An overview of the development of biodegradable materials, their characteristics, and illustrations of different applications in craniomaxillofacial surgery are presented. More than 200 patients have been treated successfully so far in our units, the longest follow-up time being now over 7 years. The good results indicate that the use of bioresorbable fixation can be considered routine and will be definitely state of art at the beginning of the new millennium.
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Affiliation(s)
- R Suuronen
- Department of Oral and Maxillofacial Surgery, Helsinki University Central Hospital, P.O. Box 263, 00029 HYKS, Finland
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46
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Teronen O, Konttinen YT, Salo T, Lindqvist C, Heikkilä P, Laitinen M, Sorsa T. [Bisphosphonates inhibit matrix metalloproteinases--a new possible mechanism of action]. Duodecim 2002; 115:13-5. [PMID: 11830856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
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47
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Jensen P, Schütz K, Lindqvist C. RED JUNGLE FOWL HAVE MORE CONTRAFREELOADING THAN WHITE LEGHORN LAYERS: EFFECT OF FOOD DEPRIVATION AND CONSEQUENCES FOR INFORMATION GAIN. BEHAVIOUR 2002. [DOI: 10.1163/15685390260437335] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
AbstractContrafreeloading (CFL), i.e. choosing food which requires work over free food, occurs at a higher rate in red jungle fowl (Gallus gallus) compared to White Leghorn layers. We examined whether this difference between breeds was altered by food deprivation and whether it affected the information gained about alternative food sources. In a first experiment, twenty birds of each breed were deprived for zero, three and six hours and then allowed a choice of feeding from freely available food or food mixed with wood shavings. In both breeds, CFL tended to decrease after deprivation, but jungle fowl consistently showed more CFL than Leghorns also after food deprivation. This shows that differences in CFL between breeds were not altered by food deprivation, and the larger CFL in jungle fowl may represent a genetically based difference in feeding strategy. In a second experiment, we examined whether the differences in CFL affected how the birds acquired information about alternative food sites of different quality. Twenty birds of each breed were allowed to forage during three 10 min sessions in a four armed maze, where symbols in each end of the arms indicated the location of four different quality food sources; 'high gain' (freely available food), 'medium gain' (70% food, 30% wood shavings), 'low gain' (30% food), and 'no gain' (100% wood shavings). Each bird was then tested in the same maze when the 'high gain' food source and its symbol had been removed, and the other three sources contained only the symbols and wood shavings. Jungle fowl chose the symbol indicating the best available food source significantly more often than the Leghorns. The results indicate that Leghorn gain less information during foraging, which may have consequences for their adaptation capacity in a production environment. This could either be a consequence of Leghorns showing less CFL, or a generally impaired learning capacity of Leghorns compared to jungle fowl.
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Lundin K, Blomberg K, Nordström T, Lindqvist C. Development of a time-resolved fluorescence resonance energy transfer assay (cell TR-FRET) for protein detection on intact cells. Anal Biochem 2001; 299:92-7. [PMID: 11726189 DOI: 10.1006/abio.2001.5370] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An assay named Cell TR-FRET based on time-resolved fluorescence resonance energy transfer, here utilized for detection of receptor proteins on intact cells, is described. In this assay, intact membrane-biotinylated Sf9 cells expressing human interleukin-2Ralpha due to infection with a recombinant baculovirus were prelabeled with a streptavidin-europium (Eu(3+)) chelate, the donor. These prelabeled cells were used in a homogeneous assay by addition of a fluorochrome-labeled anti-hIL-2Ralpha-specific antibody, 7G7B6-Cy5, the acceptor. Binding of 7G7B6-Cy5 to hIL-2Ralpha expressed on the cell surface and europium-labeled streptavidin to surface biotin esters brings the donor and the acceptor in close proximity, allowing transfer of energy from the excited state donor to the acceptor. This energy transfer was specifically inhibited by unlabeled antibody and by free biotin. The described assay constitutes a general method since no specific component of the cell membrane is labeled, thereby allowing a number of binding studies on the cell membrane, including receptor density determinations, to be performed. In addition, due to the rapid fashion in which the Cell TR-FRET assay is accomplished, it can be a valuable method not only for identifying novel membrane-associated proteins, but also for drug screening of large samples in high-throughput format.
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Affiliation(s)
- K Lundin
- Department of Biology, Abo Akademi University, FIN-20520 Turku, Finland
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49
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Lundin K, Leppimäki P, Oetken C, Nordström T, Lindqvist C. Production and partial characterization of mouse monoclonal antibodies recognizing common cytokine receptor gamma chain (gammac) of human, mouse and primate origin. APMIS 2001; 109:647-55. [PMID: 11890567 DOI: 10.1034/j.1600-0463.2001.d01-128.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Monoclonal antibodies specific for the common cytokine receptor gamma chain, gammac, were produced using traditional hybridoma technology. Fusion of P3X63-Ag8.653 myeloma cells with splenocytes from Balb/c mice immunized with Spodoptera frugiperda insect cells infected with the recombinant baculovirus VL1392-hIL-2Rgamma resulted in several hybridoma cell clones producing monoclonal gammac-specific antibodies. Four of these antibody-producing clones, IIIC3, IIIE8, IG3 and IF10C5, were further characterized by immunoblotting, flow cytometry and ELISA. Data are presented demonstrating that the generated monoclonal antibodies can identify the extracellular domain of the common cytokine receptor gamma chain of human and mouse origin, and two of the antibodies recognize gammac of primate origin as well.
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Affiliation(s)
- K Lundin
- Department of Biology, Abo Akademi University, Turku, Finland
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50
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Tarkkila L, Linna M, Tiitinen A, Lindqvist C, Meurman JH. Oral symptoms at menopause--the role of hormone replacement therapy. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2001; 92:276-80. [PMID: 11552144 DOI: 10.1067/moe.2001.117452] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE A questionnaire was used to investigate the prevalence of self-assessed sensations of painful mouth (PM) and dry mouth (DM) in menopause-aged women. Special attention was paid to the association of the use of hormone replacement therapy (HRT) with oral symptoms. Our hypothesis was that women using HRT have fewer oral symptoms than those who do not use HRT. STUDY DESIGN Patients were selected from among 50- to 58-year-old women attending a communal mammography screening program in Helsinki, Finland. Every fifth woman was offered a structured questionnaire. RESULTS Completed questionnaires were received from 3173 women (response rate, 65%). Of the total sample, 46.8% (n = 1486) used HRT. The occurrence of PM was 8.2% (n = 259) and DM, 19.9% (n = 631). Climacteric symptoms were reported by 24% (n = 761) of the total sample and by 19.2% (n = 285) of the HRT users. According to logistic regression analyses, climacteric symptoms were found to be predictive of PM (P =.000) and DM (P =.000). The use of HRT also increased the occurrence of PM (P =.03). However, as a single covariate in our statistical model, the use of HRT was not a predictor of PM. The use of HRT also did not correlate with the occurrence of DM. CONCLUSIONS The occurrence of PM and of DM seemed to be associated with climacteric symptoms in general, and the use of HRT did not prevent the oral symptoms studied.
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Affiliation(s)
- L Tarkkila
- Institute of Dentistry, University of Helsinki, Finland.
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