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  • 1.
    Al-Tamprouri, Chaifa
    et al.
    Umeå University, Faculty of Medicine, Department of Clinical Sciences, Paediatrics.
    Barman, Malin
    Hesselmar, Bill
    Bråbäck, Lennart
    Umeå University, Faculty of Medicine, Department of Public Health and Clinical Medicine, Section of Sustainable Health.
    Sandin, Anna
    Umeå University, Faculty of Medicine, Department of Clinical Sciences, Paediatrics.
    Cat and dog ownership during/after the first year of life and risk for sensitization and reported allergy symptoms at age 132019In: Immunity, Inflammation and Disease, E-ISSN 2050-4527Article in journal (Refereed)
    Abstract [en]

    Background: Avoidance of pets as a strategy for preventing atopic diseases has been questioned. This study aimed to identify the risk of sensitization and allergic symptoms at age 13 in relation to dog‐ and cat‐keeping during and after the first year of life.

    Methods: The study included all children born at Östersund Hospital in Northern Sweden between February 1996 and January 1997 (n = 1231). At inclusion, parents were asked to answer questionnaires about lifestyle, including cat‐ and dog‐keeping. Dog allergy, cat allergy, hay fever, and asthma were diagnosed based on parental reported allergic symptoms at 13 years of age (n = 834). The risks of sensitization or allergy in relation to dog‐ and cat‐keeping during and after the first year of life were analyzed with logistic regression. To adjust for reverse causation, all subjects that had reported avoidance of pets due to allergic symptoms of the child or allergy in the family (n = 177) were excluded.

    Results: Dog‐ or cat‐keeping during the first year of life reduced the risk of sensitization to dog or cat allergens, respectively, and to birch and to at least one of the 10 allergens tested. Cat‐keeping, both during and after the first year of life, reduced the risk of cat allergy and hay fever. Having a dog at home during the first year of life reduced the risk of dog and cat allergy, whereas dog‐keeping after the first year of life did not affect allergic symptoms.

    Conclusions: Cat ownership, either during or after the first year of life, may be a strategy for preventing the development of cat allergy and hay fever later in life. Dog ownership reduced the risk of sensitization to dog and birch allergen, and also the risk of cat and dog allergy, but had no effect on hay fever.

  • 2.
    Holm, Anna
    et al.
    Umeå University, Faculty of Medicine, Department of Clinical Sciences, Otorhinolaryngology.
    Nagaeva, Olga
    Umeå University, Faculty of Medicine, Department of Clinical Microbiology, Clinical Immunology.
    Nagaev, Ivan
    Umeå University, Faculty of Medicine, Department of Clinical Microbiology, Clinical Immunology.
    Loizou, Christos
    Umeå University, Faculty of Medicine, Department of Clinical Sciences, Otorhinolaryngology.
    Laurell, Göran
    Mincheva-Nilsson, Lucia
    Umeå University, Faculty of Medicine, Department of Clinical Microbiology, Clinical Immunology.
    Nylander, Karin
    Umeå University, Faculty of Medicine, Department of Medical Biosciences, Pathology.
    Olofsson, Katarina
    Umeå University, Faculty of Medicine, Department of Clinical Sciences, Otorhinolaryngology.
    Lymphocyte profile and cytokine mRNA expression in peripheral blood mononuclear cells of patients with recurrent respiratory papillomatosis suggest dysregulated cytokine mRNA response and impaired cytotoxic capacity2017In: Immunity, Inflammation and Disease, E-ISSN 2050-4527, Vol. 5, no 4, p. 541-550Article in journal (Refereed)
    Abstract [en]

    OBJECTIVES: Recurrent respiratory papillomatosis (RRP) is a relatively rare, chronic disease caused by Human Papilloma Virus (HPV) 6 and 11, and characterized by wart-like lesions in the airway affecting voice and respiratory function. The majority of HPV infections are asymptomatic and resolve spontaneously, however, some individuals are afflicted with persistent HPV infections. Failure to eliminate HPV 6 and 11 due to a defect immune responsiveness to these specific genotypes is proposed to play a major role in the development of RRP.

    METHODS: We performed a phenotypic characterization of peripheral blood mononuclear cells (PBMC) collected from 16 RRP patients and 12 age-matched healthy controls, using immunoflow cytometry, and monoclonal antibodies against differentiation and activation markers. The cytokine mRNA profile of monocytes, T helper-, T cytotoxic-, and NK cells was assessed using RT-qPCR cytokine analysis, differentiating between Th1-, Th2-, Th3/regulatory-, and inflammatory immune responses.

    RESULTS: We found a dominance of cytotoxic T cells, activated NK cells, and high numbers of stressed MIC A/B expressing lymphocytes. There was an overall suppression of cytokine mRNA production and an aberrant cytokine mRNA profile in the activated NK cells.

    CONCLUSION: These findings demonstrate an immune dysregulation with inverted CD4(+) /CD8(+) ratio and aberrant cytokine mRNA production in RRP patients, compared to healthy controls.

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