Pollen Allergens

J Seasonal (hay fever) occurs in response to specific allergens (pollen from trees, grasses, and weeds) present at predictable times of the year (spring and/or fall blooming seasons) and typically causes more acute symptoms. Perennial (intermittent or persistent) occurs year round in response to nonseasonal allergens (e.g., dust mites, animal dander, molds) and usually causes more subtle, chronic symptoms. 

Allergens Pollen, house dust Animal dander Asthma, rhinitis... 

These do not work for MCS patients, or at least not well, because they purify hardly any harmful chemical substances from the air. HEPA filters are mostly used to clean allergens, pollen, dust and spores of mold from the air. 

Rhinitis—inflammation of the mucous membrane that lines the nose (NALT). It is a frequent allergy symptom due to inhalant allergens (pollen, dust, or other airborne substances). 

Allergens pollen, dust, food, molds, animal dander, etc. Occupational exposure fumes, gases, and chemicals... 

Courtesy - Smith, E.G., Sampling and Identifying Allergenic Pollens and Molds, Blewstone Press, San Antonio, TX)... 

Obtain the book by E. Grant Smith, Sampling and Identifying Allergenic Pollens and Molds An Illustrated Manual for Air Samplers (1990), Blewstone Press, Box 8571, San Antonio, TX 78209. Until then, refer to Figures E53-1, p. 692, and E53-2, p. 693, to help you identify pollens and molds. 

The problem of allergies has increased during the last few years. The tendency to develop allergies and asthma is not well understood, but a number of pollutants can trigger the reaction, for instance, airborne allergens such as pollen,... 

Allergens Pollutants that may cause an allergy, including pollens, dusts, animal dander, insect debris, mold and fungi spores. 

An allergen is usually an inert substance (e.g. pollen, house dust mite faeces) that in some individuals can trigger the generation of an (inappropriate) antigenic response. Mediated by TH2 lymphocytes, it causes B-Lymphocytes to produce lgE. Subsequent exposure of a sensitized individual to the allergen is therefore able to cross-link IgE antibodies on the surface of mast cells and trigger an immune response and histamine release. 

Extrinsic (also referred to as allergic asthma and caused in response to an allergen such as pollen, dust, and animal dander)... 

Francis JN, Till SJ, Durham SR Induction of 1L-10+CD4+CD25+ T cells by grass pollen immunotherapy. J Allergy Clin Immunol 2003 111 1255-1261. Jutel M, Akdis M, Budak F, Aebischer-Casaulta C. Wrzyszcz M, Blaser K, Akdis CA lL-10 and TGF-P cooperate in the regulatory T cell response to mucosal allergens in normal immunity and specific immunotherapy. Eur J Immunol 2003 33 1205-1214. 

Pilette C. Nouri-Aria KT. Jacobson MR. Wilcock LK, Detry B. Walker SM. Francis JN. Durham SR Grass pollen immunotherapy induces an allergen-specific IgA2 antibody response associated with mucosal TGF-P expression. J Immunol 2007 178 4658-4666. 

Varney VA. Hamid QA. Gaga M. Ying S. Jacobson M, Frew AJ. Kay AB. Durham SR Influence of grass pollen immunotherapy on cellular infiltration and cytokine mRNA expression during allergen-induced late-phase cutaneous responses. J Clin Invest 1993 92 644-651. 

Jutel M, Jaeger L, Suck R, Meyer H, Fiebig H, Cromwell O Allergen-specific immunotherapy with recombinant grass pollen allergens. J Allergy Clin Immunol 2005 116 608-613. 

Plants are detrimental in many ways to the health and well-being of man. It is difficult to quantify the health aspects of weeds. Weeds known to produce allergenic reactions in humans can be divided into two major groups. One group produces skin eruption as a result of bodily contact with the plant, while the other produces symptoms usually affecting the respiratory tract through inhalation of pollen grains. 

Plants causing allergenic reactions by inhalation of pollen grains are numerous and widely distributed. Plant families whose pollen causes allergic reactions include Gramineae,... 

Plantaginaceae, and Compositae. Ragweed (Ambrosia spp.) is the most important single allergenic plant on the North American continent and affects more of our citizens than does smog. Hay fever and similar allergies from weed pollen cause tremendous... 

High-efficiency particulate air filters can remove lightweight particles such as pollens, mold spores, and cat allergen, thereby reducing allergic respiratory symptoms. 

Maejima, K., et al., Comparison of the effects of various fine particles on IgE antibody production in mice inhaling Japanese cedar pollen allergens, J. Toxicol. Environ. Health. 52, 3, 231, 1997. 

Because people with MCS react to chemicals at levels that ordinarily do not affect others, chemical sensitivity is sometimes referred to as chemical allergy, although the mechanism is not the same as in the more traditional allergies. A person with MCS may react to animals, pollen, dust and mold with symptoms that are the same or different from those of traditional allergies. People with MCS may also have common allergy symptoms such as itchy eyes, nasal congestion, sinusitis, asthma, hives and other rashes that result from exposures to chemicals or typical allergens. 

Major pollen allergen Juniperus ashei 1PXZ 1.7 etal. (1997) Czerwinski... 

Czerwinski, E. W., Midoro-Horiuti, T., White, M. A., Brooks, E. G., and Goldblum, R. M. (2005). Crystal structure of Jun a 1, the major cedar pollen allergen from Juniperus ashei, reveals a parallel beta-helical core./ Biol. Chem. 280, 3740-3746. 

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