Thursday, April 25 2024

How Does Pollen Provoke Allergic Reactions?

How do pollen particles provoke allergic reactions? A study in The Journal of Experimental Medicine puts some of the blame on bioactive molecules that are released from pollen. These molecules bind to immune cells and cause them to launch a typical allergy-promoting immune response. Pollen from plants exposed to air pollutants produce more of these allergy-provoking compounds than do pollen from unpolluted areas, possibly explaining why allergies are more prevalent in places with high levels of car exhaust emissions.

Pro-Infammatory Molecules

Traidl-Hoffmann and colleagues showed that extracts from birch pollen and other common allergens block the production of a soluble protein by immune cells that normally inhibits allergic reactions.

They went on to identify the compound in the pollen extracts that caused the inhibitory response and showed that it was similar to certain pro-inflammatory molecules produced in the body in response to injury or infection.

The authors now plan to assess whether cells from allergy-prone people are more sensitive to the effects of the pollen-derived compound than those from non-allergic individuals. A better understanding of these molecules and how they work may eventually lead to new approaches to treating allergies.

Wednesday, April 24 2024

Household Dust Is Full of Pollutants

You may want to think again before you dust the top of your refrigerator or vacuum under the couch. "Certain toxic chemicals, such as lead, pesticides, polychlorinated biphenyls (PCBs) and polycyclic aromatic hydrocarbons (PAHs) are routinely found in household dust," explains Andrea Ferro, professor of civil and environmental engineering at Clarkson University and an air quality researcher. "Simple activities such as dusting and vacuuming generate or resuspend the pollutants into the air that we then breathe in."

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Friday, April 5 2024

Food Allergy Prevention

Nursing mothers can help prevent or delay food allergic reactions in high-risk infants through dietary modifications, according to a report in the New England Journal of Medicine. High-risk infants are those who have someone in their family who has allergies.

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Wednesday, March 13 2024

Do Children Outgrow Allergies?

Yes, sometimes children will outgrow their allergies, but if they do, they usually do so by age three. Food allergies are more likely to be "outgrown" than allergies to other substances. Infants inherit a tendency toward allergies. If their parents outgrew their allergies chances are the  […]

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Wednesday, February 28 2024

How Can I Tell If My Child Has an Allergies?

If you believe your child has an allergy, you need to seek medical attention from a pediatrician or an allergist. There are many tests available to pinpoint allergens, but not all are successful. Although, most allergists still believe the skin tests are the most accurate, they do not pinpoint  […]

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Thursday, February 22 2024

Where Is the Best Place to Live With Allergies?

There may not be a best place to live if you have allergies. People with allergies have an genetic tendency to produce IgE, the allergic antibody, to many seasonable allergens. If you move, you move your IgE with you. It might not happen right away, but chances are if you move you will develop an  […]

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Sunday, February 11 2024

What Is Allergic Rhinitis?

This is a general term which applies to anyone who has symptoms of runny nose, nasal congestion, or sneezing due to an allergic reaction. Allergic rhinitis can be a seasonal as with hay fever, or it may be a year-round problem caused by indoor allergens such as dust mites, animal dander, insect  […]

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Saturday, February 3 2024

Food-Allergy Fears Drive Overly Restrictive Diets

Many children, especially those with eczema, are unnecessarily avoiding foods based on incomplete information about potential food-allergies, according to researchers at National Jewish Health. The food avoidance poses a nutritional risk for these children, and is often based primarily on data from blood tests known as serum immunoassays.

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