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Allergies, also known as allergic diseases, are various conditions caused by hypersensitivity of the immune system to typically harmless substances in the environment. These diseases include hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis. Symptoms may include red eyes, an itchy rash, sneezing, coughing, a runny nose, shortness of breath, or swelling. Note that food intolerances and food poisoning are separate conditions.
An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body. Such reactions are called allergies.
The Samoyed is a breed of medium-sized herding dogs with thick, white, double-layer coats. They are spitz-type dogs which take their name from the Samoyedic peoples of Siberia. Descending from the Nenets Herding Laika, they are domesticated animals that assist in herding, hunting, protection and sled-pulling.
A food allergy is an abnormal immune response to food. The symptoms of the allergic reaction may range from mild to severe. They may include itchiness, swelling of the tongue, vomiting, diarrhea, hives, trouble breathing, or low blood pressure. This typically occurs within minutes to several hours of exposure. When the symptoms are severe, it is known as anaphylaxis. A food intolerance and food poisoning are separate conditions, not due to an immune response.
Latex allergy is a medical term encompassing a range of allergic reactions to the proteins present in natural rubber latex. It generally develops after repeated exposure to products containing natural rubber latex. When latex-containing medical devices or supplies come in contact with mucous membranes, the membranes may absorb latex proteins. In some susceptible people, the immune system produces antibodies that react immunologically with these antigenic proteins. Many items contain or are made from natural rubber, including shoe soles, pen grips, hot water bottles, elastic bands, rubber gloves, condoms, baby-bottle nipples, and balloons; consequently, there are many possible routes of exposure that may trigger a reaction. People with latex allergies may also have or develop allergic reactions to some fruits, such as bananas.
Skin disorders are among the most common health problems in dogs, and have many causes. The condition of a dog's skin and coat is also an important indicator of its general health. Skin disorders of dogs vary from acute, self-limiting problems to chronic or long-lasting problems requiring life-time treatment. Skin disorders may be primary or secondary in nature, making diagnosis complicated.
A hypoallergenic dog breed is a dog breed that is purportedly more compatible with allergic people than are other breeds. However, prominent allergen researchers have determined that there is no basis to the claims that certain breeds are hypoallergenic and, while allergen levels vary among individual dogs, the breed is not a significant factor.
In academia, computational immunology is a field of science that encompasses high-throughput genomic and bioinformatics approaches to immunology. The field's main aim is to convert immunological data into computational problems, solve these problems using mathematical and computational approaches and then convert these results into immunologically meaningful interpretations.
β-Lactoglobulin (BLG) is the major whey protein of cow and sheep's milk, and is also present in many other mammalian species; a notable exception being humans. Its structure, properties and biological role have been reviewed many times. BLG is considered to be a milk allergen.
Allergies to cats, a type of animal allergy, are one of the most common allergies experienced by humans. Among the eight known cat allergens, the most prominent allergen is secretoglobin Fel d 1, which is produced in the anal glands, salivary glands, and, mainly, in sebaceous glands of cats, and is ubiquitous in the United States, even in households without cats. The second most common is Fel d 2, this type is triggered by the cats dead skin flakes (dander) that are floating in the air as well as in the smell of cat urine.
Milk allergy is an adverse immune reaction to one or more proteins in cow's milk. Symptoms may take hours to days to manifest, with symptoms including atopic dermatitis, inflammation of the esophagus, enteropathy involving the small intestine and proctocolitis involving the rectum and colon. However, rapid anaphylaxis is possible, a potentially life-threatening condition that requires treatment with epinephrine, among other measures.
Wheat allergy is an allergy to wheat which typically presents itself as a food allergy, but can also be a contact allergy resulting from occupational exposure. Like all allergies, wheat allergy involves immunoglobulin E and mast cell response. Typically the allergy is limited to the seed storage proteins of wheat. Some reactions are restricted to wheat proteins, while others can react across many varieties of seeds and other plant tissues. Wheat allergy is rare. Prevalence in adults was found to be 0.21% in a 2012 study in Japan.
Fel d 1 is a secretoglobin protein complex that, in cats, is encoded by the CH1 and CH2 genes.
The lipocalins are a family of proteins which transport small hydrophobic molecules such as steroids, bilins, retinoids, and lipids, and most lipocalins are also able to bind to complexed iron as well as heme. They share limited regions of sequence homology and a common tertiary structure architecture. This is an eight stranded antiparallel beta barrel with a repeated + 1 topology enclosing an internal ligand binding site.
Major urinary proteins (Mups), also known as α2u-globulins, are a subfamily of proteins found in abundance in the urine and other secretions of many animals. Mups provide a small range of identifying information about the donor animal, when detected by the vomeronasal organ of the receiving animal. They belong to a larger family of proteins known as lipocalins. Mups are encoded by a cluster of genes, located adjacent to each other on a single stretch of DNA, that varies greatly in number between species: from at least 21 functional genes in mice to none in humans. Mup proteins form a characteristic glove shape, encompassing a ligand-binding pocket that accommodates specific small organic chemicals.
Laboratory animal allergy (LAA) is an occupational disease of laboratory animal technicians and scientists. It manifests as an allergic response to animal urine, specifically the major urinary proteins (Mups) of rodents, and can lead to the development of asthma. A study of 5641 workers in Japan who were exposed to laboratory animals found 23.1% had one or more allergic symptoms; globally the prevalence among at risk workers is estimated between 11 and 30% According to the National Institutes of Health, prevention of animal allergy depends on the control of allergens in the work environment. This involves a combination of measures to eliminate or control allergen exposure, including engineering controls, administrative controls, and personal protective equipment.
Bet v I allergen is a family of protein allergens. Allergies are hypersensitivity reactions of the immune system to specific substances called allergens that, in most people, result in no symptoms.
Peptidase 1 (mite) (EC 3.4.22.65), also known as endopeptidase 1 (mite), is an enzyme found in various species of mites. This enzyme exhibits cysteine protease activity with broad endopeptidase specificity.
Cats exposed to allergens may develop allergies or allergic reactions. Allergies tend to become evident and intensify over extended periods of time and can take years to develop. Some allergic diseases and allergies in cats include feline atopic dermatitis, flea allergy dermatitis, feline-mosquito hypersensitivity, and food-induced allergy. In the case of feline atopy, hypersensitivity to allergens is due to genetic predisposition. However, various allergies may arise due to environmental factors. Allergens, ingested, inhaled, or airborne, can be seasonal or non-seasonal, similar to allergies in humans. Suspected seasonal allergens include but are not limited to pollen, fleas, and mosquito bites; suspected non-seasonal allergens include but are not limited to plastic materials, food, dust, trees, and grass. After exposure to suspected allergens, symptoms may be immediate or delayed, arising within a few minutes to two hours. Symptoms can include both dermatological and gastrointestinal signs such as itchy skin, hair loss and excessive scratching. In cases of feline atopic dermatitis or atopy in cats, pruritic skin diseases may result; however, signs can also include miliary dermatitis, symmetrical alopecia, and lesions of the eosinophilic granuloma complex.
Hypoallergenic dog food diets are created for dogs that experience food-related allergies causing adverse effects to their physical health.Super Hypoallergenic is enzymatic hydrolyzed hypoallergenic ostrich protein. The molecules that usually become allergens are intact proteins or glycoproteins. Hypoallergenic dog food diets offer a variety of protein sources that are unique by using proteins that are not recognized by the dog's antibodies as being antigens, minimizing allergic reactions for example Ostrich meat, bones and sinews. Adding novel protein sources, such as novel meats that a dog or its ancestors have never been exposed to is one method. Novel proteins can also be created by chemically modifying well known protein sources using hydrolysis techniques, rendering proteins unrecognizable by the gastrointestinal tract. Not all antigens are specific to proteins, however, and it is possible for anything that the body ingests to become an allergen. Providing diets with a limited amount of ingredients can be used for diagnostic purposes, as well as for dogs who are allergic to the common ingredients that are used in pet food. Certain nutrients are commonly incorporated into hypoallergenic dog food to help alleviate the symptoms of an allergic reaction. These ingredients include omega-3 fatty acids, Vitamins A and E, zinc, novel carbohydrates, and fiber.
References
- ↑ Major allergen Can f 1 UniProtKB.
- ↑ Grammer, Leslie C. and Paul A. Greenberger (2009), Patterson's Allergic Diseases p. 97.
- ↑ Konieczny, A; Morgenstern, J P; Bizinkauskas, C B; Lilley, C H; Brauer, A W; Bond, J F; Aalberse, R C; Wallner, B P; Kasaian, M T (December 1997). "The major dog allergens, Can f 1 and Can f 2, are salivary lipocalin proteins: cloning and immunological characterization of the recombinant forms". Immunology. 92 (4): 577–586. doi:10.1046/j.1365-2567.1997.00386.x. ISSN 0019-2805. PMC 1364166 . PMID 9497502.
- ↑ Jensen-Jarolim, E.; Pacios, L.F.; Bianchini, R.; Hofstetter, G.; Roth-Walter, F. (March 2016). "Structural similarities of human and mammalian lipocalins, and their function in innate immunity and allergy". Allergy. 71 (3): 286–294. doi:10.1111/all.12797. ISSN 0105-4538. PMC 4949658 . PMID 26497994.
- ↑ Breitenbuecher, Christina; Belanger, Janelle M.; Levy, Kerinne; Mundell, Paul; Fates, Valerie; Gershony, Liza; Famula, Thomas R.; Oberbauer, Anita M. (2016-04-22). "Protein expression and genetic variability of canine Can f 1 in golden and Labrador retriever service dogs". Canine Genetics and Epidemiology. 3: 3. doi: 10.1186/s40575-016-0031-3 . ISSN 2052-6687. PMC 4840867 . PMID 27110374.
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