Showing posts with label atopy. Show all posts
Showing posts with label atopy. Show all posts

23 September 2013

Any benefits of probiotics in allergic disorders?

Any benefits of probiotics in allergic disorders?
-Ozdemir, O
Division of Allergy/Immunology, Department of Pediatrics, Private SEMA Research and Training Hospital, Istanbul, Turkey.
Allergy Asthma Proc. 2010 Mar-Apr;31(2):103-11. doi: 10.2500/aap.2010.31.3313.

Excerpts:
  • There is insufficient but very promising evidence to recommend the addition of probiotics to foods for prevention and treatment of allergic diseases, especially atopic dermatitis.
  • Clinical improvement especially in allergic rhinitis and IgE-sensitized (atopic) eczema has been reported too.
Editor: How can data be "insufficient" but "very promising"?

Food allergy and eosinophilic esophagitis: Learning what to avoid

Food allergy and eosinophilic esophagitis: Learning what to avoid
-Sandra Hong, MD, Nicola Vogel, MD
doi: 10.3949/ccjm.77a.09018 Cleveland Clinic Journal of Medicine January 2010 vol. 77 1 51-59. (c)2010 The Cleveland Clinic Foundation.

Excerpts:
  • The gut flora. When mice are raised in a germ-free environment, they fail to develop normal tolerance.They are also more likely to become sensitized if they are treated with antibiotics or if they lack toll-like receptors that recognize bacterial lipopolysaccharides. Furthermore, human studies suggest that probiotics promote tolerance, especially in preventing atopic dermatitis, although the studies have had conflicting results.
  • The gastric pH. Murine and human studies reveal that antacid medications increase the risk of food allergy.
  • Three types of immune responses to food. About 20% of all people alter their diet because of concerns about adverse reactions to foods. These adverse reactions include metabolic disorders (eg, lactose intolerance), a reaction to a pharmacologic component such as caffeine or a toxic contaminant of a food (eg, bacterial food poisoning), psychological reactions (eg, food aversion), and documented immunologic responses to a food (eg, food allergy)
    Immunologic reactions to foods can be divided into three categories: mediated by immunoglobulin E (IgE), non-IgE-mediated, and mixed. Therefore, these disorders can present as an acute, potentially life-threatening reaction or as a chronic disease such as eosinophilic gastoenteropathy.

20 September 2013

Atopic syndrome

  • "Atopic syndrome is a predisposition toward developing certain allergic hypersensitivity reactions. Atopy may have a hereditary component, although contact with the allergen must occur before the hypersensitivity reaction can develop."
  •  Many EE patients suffer from concurrent autoimmune and allergic disease.
  • Patients with atopy usually develop what is referred to as the “allergic triad” of symptoms, i.e., eczema (atopic dermatitis), hay fever (allergic rhinitis), and allergy-induced asthma (allergic asthma).
  • They also have a tendency to have food allergies, and other symptoms characterized by their hyperallergic state. For example, eosinophilic esophagitis is found associated with atopic allergies.
  • Although atopy has various definitions, in general, it is defined by the presence of elevated levels of total and allergen-specific IgE in the serum, leading to positive skin-prick tests to common allergens.
  • There is a strong genetic predisposition toward atopic allergies, especially on the maternal side.
-Atopy - Wikipedia, the free encyclopedia