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Sökning: swepub > Larsson Anders > Tidskriftsartikel > Wejåker Per Erik

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2.
  • Carlander, David, et al. (författare)
  • Peroral immunotherapy with yolk antibodies for the prevention and treatment of enteric infections
  • 2000
  • Ingår i: Immunologic research. - 0257-277X. ; 21:1, s. 1-6
  • Tidskriftsartikel (refereegranskat)abstract
    • Oral administration of specific antibodies is an attractive approach to establish protective immunity against gastrointestinal pathogens in humans and animals. The increasing number of antibiotic-resistant bacteria emphasize the need to find alternatives to antibiotics. Immunotherapy can also be used against pathogens that are difficult to treat with traditional antibiotics. Laying hens are very good producers of specific antibodies. After immunization, the specific antibodies are transported to the egg yolk from which the antibodies then can be purified. A laying hen produces more than 20 g of yolk antibodies (IgY) per year. These antibodies also have biochemical properties that make them attractive for peroral immunotherapy: They neither activate mammalian complement nor interact with mammalian Fc receptors that could mediate inflammatory response in the gastrointestinal tract. Eggs are also normal dietary components and thus there is practically no risk of toxic side effects of IgY. Yolk antibodies have been shown in several studies to prevent bacterial and viral infections.
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3.
  • Kollberg, Hans, et al. (författare)
  • Oral administration of specific yolk antibodies (IgY) may prevent Pseudomonas aeruginosa infections in patients with cystic fibrosis : a phase I feasibility study
  • 2003
  • Ingår i: Pediatric Pulmonology. - 8755-6863. ; 35:6, s. 433-40
  • Tidskriftsartikel (refereegranskat)abstract
    • Respiratory infection is the major cause of morbidity and mortality in cystic fibrosis (CF) patients. Chronic Pseudomonas aeruginosa (PA) infections ultimately occur in virtually all patients. It is impossible to eradicate PA when a patient has been chronically colonized. Immunotherapy with specific egg-yolk antibodies (IgY) may be an alternative to antibiotics for the prevention of PA infections. We wanted to determine if treatment with specific IgY can prolong the period between the first and the second PA colonization? And long-term, can the treatment diminish the number of positive PA cultures and postpone the onset of chronic colonization? CF patients gargled daily with an IgY-antibody preparation, purified from eggs of hens immunized with PA bacteria. They were compared to a group of patients who did not gargle with the preparation. Both groups had their first colonization with PA eradicated by antibiotics. The basic treatment was essentially the same in both groups. In the initial study, the period between the first and second colonization with PA was significantly prolonged for the treated vs. the control group (Kaplan-Meier P = 0.015, Breslow test). In the prolonged study, the treated group had only 2.5 sputum cultures positive for PA per 100 months of observation, and none of these patients became chronically colonized with PA. No adverse events were reported. In the control group, 13.7 cultures per 100 months of observation were positive for PA, and 5 (24%) patients became chronically colonized with PA. This feasibility study shows that antipseudomonal IgY has the potential to effectively prevent PA colonization without any severe adverse effects. A phase III study should be initiated.
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6.
  • Larsson, Anders, et al. (författare)
  • Peroxidase labelling of chicken anti-bodies
  • 1999
  • Ingår i: Food and Agricultural Immunology. - 0954-0105. ; 11:1, s. 43-49
  • Tidskriftsartikel (refereegranskat)abstract
    • Chicken antibodies have several advantages over mammalian antibodies due to the phylogenetical differences between birds and mammals, resulting in an increased sensitivity and a decreased background in many immunological assays. So far, there has been a very limited use of avian antibodies. This is probably partly due to tradition but also because there are very few optimized methods for the labelling of chicken antibodies. We report upon the suitable conditions for peroxidase-labelling of chicken antibodies with a modified periodate method.
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7.
  • Nilsson, Elin, et al. (författare)
  • Good effect of IgY against Pseudomonas aeruginosa infections in cystic fibrosis patients
  • 2008
  • Ingår i: Pediatric Pulmonology. - 8755-6863. ; 43:9, s. 892-899
  • Tidskriftsartikel (refereegranskat)abstract
    • This is an extended open study of oral prophylactic treatment with egg yolk antibodies against Pseudomonas aeruginosa, Anti-Pseudomonas IgY, of 17 Swedish patients with cystic fibrosis. They have been on prophylactic IgY treatment for up to 12 years and altogether for 114 patient years. A group of 23 Danish CF patients served as control. There has been a total absence of adverse events. Only 29 cultures have been positive for P. aeruginosa (cultures after chronic colonization not included), that is, 2.3/100 treatment months compared to 7.0/100 months in the control group (P = 0.028). In the IgY treated group only one pair of siblings (2/17) has been chronically colonized with P. aeruginosa compared to seven patients (7/23) in the control group. Atypical mycobacteria, S. maltophilia, A. xylosoxidans, and A. fumigatus have appeared only sporadically. There have been no cultures positive for B. cepacia. There was no decrease in pulmonary functions (P = 0.730) within the IgY group. Body mass index values were normal or close to normal for all IgY treated patients. In conclusion, Anti-Pseudomonas IgY has great potential to prevent P. aeruginosa infections.
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8.
  • Nilsson, Elin, et al. (författare)
  • More than 10 years' continuous oral treatment with specific immunoglobulin Y for the prevention of Pseudomonas aeruginosa infections : a case report
  • 2007
  • Ingår i: Journal of Medicinal Food. - 1096-620X. ; 10:2, s. 375-378
  • Tidskriftsartikel (refereegranskat)abstract
    • Immunotherapy with specific antibodies is an alternative to antibiotics for the prevention of infections in humans and animals. We have used orally administered immunoglobulin Y (IgY) preparations, purified from eggs of hens immunized with Pseudomonas aeruginosa bacteria, to prevent pulmonary P. aeruginosa infections in a group of patients with cystic fibrosis (CF). Respiratory infections are major problems for CF patients because of the thick mucus in the airways, and chronic P. aeruginosa lung infections occur in virtually all CF patients and cause morbidity and mortality. The IgY-treated group had only 2.5 P. aeruginosa-positive sputum cultures per 100 months, and none of the IgY-treated patients became chronically colonized with P. aeruginosa. In the control group, 13.7 of the cultures per 100 months were positive for P. aeruginosa, and 24% of patients became chronically colonized with P. aeruginosa. The first enrolled patient in this study has now been treated continuously for more than 10 years. During the first 8 years she only had four P. aeruginosa-positive cultures. After 8 years she became chronically infected, but still after 10 years the bacteria have not turned mucoid. No negative side effects of IgY treatment have been noted during these 10 years. To our knowledge this is the longest treatment with specific yolk antibodies for therapeutic purposes.
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  • Resultat 1-8 av 8
Typ av publikation
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refereegranskat (7)
övrigt vetenskapligt (1)
Författare/redaktör
Kollberg, Hans (6)
Carlander, David, (5)
Nilsson, Elin, (2)
Johannesson, Marie (2)
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Olesen, Hanne (2)
Olesen, Hanne V (1)
Johanesson, Marie (1)
Forsberg, Per-Olof, (1)
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Uppsala universitet (8)
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