It is shown in a large number of experiments that short ragweed extract, mixed-grass pollen extract, and pu.rified protein derivative (PPD) can produce very substantial tritiated thymidine uptake and lymphocyte blast transformation of peripheral blood leukocytes from normal individuals. Cord blood lymphocytes were also stimulated by pollen extracts. Differing conditions of culture probably expl...

The date palm (Phoenix dactylifera) has a wide geographical distribution (Middle East, Mediterranean, central Africa, western Asia, Australia, and North America). Pho d 2, the major allergen of date palm pollen was recently identified as a profilin, yet little is known about the nature of the other pollen allergens from this tree. The objective of this study was to characterize clinically signi...

saffron (zaaferan), botanical name crocus sativus, is the most expensive spice in the world. it is derived from the dried stigma and pistil of the purple saffron crocus flowers. iran is the largest saffron producer accounting for more than 80% of the world's production. saffron contains an aeroallergen that causes reactive respiratory allergic reactions in atopic subjects. igg antibody to aller...

its capacity to generate a great number of radical sprouts. The spreading of Ailanthus in Cagliari’s district has led to high concentration of its pollen grains in April–June, as detected by the pollen trap. Although Ailanthus was mentioned in two ancient books of allergology (1, 2), has been ignored in the recent literature. The possible sensitization to Ailanthus pollen in patients suffering ...

BACKGROUND Grass pollens are significant elicitors of IgE-mediated allergic disease in the world and timothy (Phleum pratense) is one of the most important pollens of the family. Molecular and biochemical characterization of Phleum pratense has revealed several allergen components: rPhl p 1 and rPhl p 5 have been shown to be "Species Specific Allergens", while the profilin rPhl p 12 and the cal...

In flowering plants, the process of pollen germination and tube growth is required for successful fertilization. A pollen receptor kinase from tomato (Solanum lycopersicum), LePRK2, has been implicated in signaling during pollen germination and tube growth as well as in mediating pollen (tube)-pistil communication. Here we show that reduced expression of LePRK2 affects four aspects of pollen ge...

Many competitive sportsmen in this country regularly use pollen extract as a dietary supplement in the belief that it can lead to an improvement in performance. We have investigated the effects of a six-week course of pollen extract administration on a variety of physiological parameters in a group (n = 20) of adolescent swimmers. At the time of the study, all subjects were training on a daily ...

Itching of ocular allergy is alleviated but not completely relieved by H(1) histamine receptor antagonists, suggesting that histamine is not the sole itch mediator in ocular allergy. We investigated whether leukotriene B(4) (LTB(4)), a mediator of cutaneous itch, is involved in the itch of ocular allergy in mice. Mice were immunized by the repeated subcutaneous injections of ragweed pollen and ...

BACKGROUND Bee pollen is composed of floral pollen mixed with nectar and bee secretion that is collected by foraging honey (Apis sp.) and stingless bees. It is rich in nutrients, such as sugars, proteins, lipids, vitamins and flavonoids, and has been ascribed antiproliferative, anti-allergenic, anti-angiogenic and free radical scavenging activities. This research aimed at a preliminary investig...

Type 1 allergic reactions, such as hay fever and allergic asthma, triggered by grass pollen allergens are a global health problem that affects approximately 20% of the population in cool, temperate climates. Ryegrass is the dominant source of allergens because of its prodigious production of airborne pollen. Lol p 5 is the major allergenic protein of ryegrass pollen, judging from the fact that ...