Evaluation of elution behavior and morphological change of the<i>Cryptomeria japonica</i>pollen grain and release of its daughter allergenic particles by air polluted rainfall

Wang, Qingyue; Nakamura, Shinichi; Gong, Xiumin; Lu, Shengyong; Nakajima, Daisuke; Wu, Dandan; Suzuki, Miho; Sakamoto, Kentarou; Miwa, Makoto

doi:10.2495/air100171

Cited by 5 publications

(4 citation statements)

References 14 publications

(10 reference statements)

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“…These orbicules, also called Ubisch bodies, [ 123 – 127 ] are of small size (0.5–2 μ m) and thus have lower sedimentation speed compared to pollen grains. Some effects of air pollutant studied on Cryptomeria japonica pollen, as shown by Wang's group, are morphological changes and production of, taking a term from physics, “daughter” allergenic particles [ 128 – 130 ]. Wang et al used the term of “transmutation” in order to describe the modification from source (trees from mountainous areas) to deposition zones (urban sites) [ 40 ].…”

Section: Effects Of Pollutants On Pollen Grains and Pollen Contentmentioning

confidence: 99%

A Review of the Effects of Major Atmospheric Pollutants on Pollen Grains, Pollen Content, and Allergenicity

Sénéchal

Visez

Charpin

et al. 2015

The Scientific World Journal

166

111

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This review summarizes the available data related to the effects of air pollution on pollen grains from different plant species. Several studies carried out either on in situ harvested pollen or on pollen exposed in different places more or less polluted are presented and discussed. The different experimental procedures used to monitor the impact of pollution on pollen grains and on various produced external or internal subparticles are listed. Physicochemical and biological effects of artificial pollution (gaseous and particulate) on pollen from different plants, in different laboratory conditions, are considered. The effects of polluted pollen grains, subparticles, and derived aeroallergens in animal models, in in vitro cell culture, on healthy human and allergic patients are described. Combined effects of atmospheric pollutants and pollen grains-derived biological material on allergic population are specifically discussed. Within the notion of “polluen,” some methodological biases are underlined and research tracks in this field are proposed.

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Section: Effects Of Pollutants On Pollen Grains and Pollen Contentmentioning

confidence: 99%

A Review of the Effects of Major Atmospheric Pollutants on Pollen Grains, Pollen Content, and Allergenicity

Sénéchal

Visez

Charpin

et al. 2015

The Scientific World Journal

166

111

View full text Add to dashboard Cite

show abstract

“…When Yellow Sand events were transported into Japan, pH and ionic concentrations in rainwater increased drastically (Kawamura et al, 2006). Wang et al (2010) observed that the burst ratio of pollen increased with increasing ionic concentrations. It was also reported that elution of Cry j 1 was induced by solutions with high ionic concentrations (Sagehashi et al, 2005).…”

Section: Airborne Behavior Of Pollen Allergen During the Yellow Sanmentioning

confidence: 86%

Size-segregated Allergenic Particles Released from Airborne Cryptomeria japonica Pollen Grains during the Yellow Sand Events within the Pollen Scattering Seasons

Wang¹,

Gong²,

Suzuki³

et al. 2013

Asian J. Atmos. Environ

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“…In particular, mineral ions such as Ca 2+ derived from AD and/ or road dust increased about 2.5 times. In a previous report [29], elution concentration of Cry j 1 was reported to increase when exposed to solutions with high ionic concentrations under weak basic conditions. Thus, these data suggest that the release of allergenic species was enhanced by the increase in ionic concentrations when the rainfall traps Ca 2+ -rich road dust and AD particles.…”

Section: Ionic Concentrations In Different Rainfall Eventsmentioning

confidence: 99%

Release behaviour of cryptomeria japonica pollen allergenic cry J 1 and cry J 2 in rainwater containing air pollutants

Wang¹,

Nakamura²,

Gong³

et al. 2014

Int. J. SDP

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Japanese cedar (Cryptomeria japonica) pollinosis is the most popular pollinosis in Japan. In recent years, it was reported that the most Cryptomeria japonica pollen allergenic species were scattered as fi ne particles in the urban atmosphere. It is thought that allergenic fi ne particles are responsible for inducing asthma by breaking into lower respiratory tract; this phenomenon was observed in fi eld investigations during sunny days after rainfall. Hence, it is considered that the release of fi ne allergenic species derived from pollen grains may be induced during rainfall events. For this reason, we investigated the releasing behaviour of Cryptomeria japonica pollen allergenic species in rainwater containing air pollutants, through rainwater sampling and laboratory experiments. The pollen grain counts, pollen burst ratios, ionic concentrations and pH in each rainwater sample were measured, when rainwater samples were separately collected in Saitama City, a suburban area north of Tokyo metropolis. Additionally, three simulated rainwater (SR) samples were prepared to investigate the releasing behaviour of pollen allergenic species. In the samplings, the most pollen grains were trapped into initial rainwater (IR). Moreover, burst pollen grains were observed in many rainwater samples. Burst ratio of pollen grains were positively correlated with pH and ionic concentrations in rainwater. Therefore, it was thought that pollen grains were washed out by IR containing air pollutants. On the other hand, for the laboratory experiments, the elution of allergenic Cry j 1 and Cry j 2 was observed when pollen grains were exposed to different SR samples. A time-dependent increase of Cry j 1 was observed, but the elution of Cry j 2 was not observed from pollen grains exposed to SR samples. In particular, the elution of Cry j 1 increased by contact with SR samples under conditions of Asian dust events. The results demonstrated that the burst of pollen grains is associated with the production of fi ne particles containing pollen allergenic species, and that the release of allergenic species was induced by rainwater containing air pollutants.

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Evaluation of elution behavior and morphological change of theCryptomeria japonicapollen grain and release of its daughter allergenic particles by air polluted rainfall

Cited by 5 publications

References 14 publications

A Review of the Effects of Major Atmospheric Pollutants on Pollen Grains, Pollen Content, and Allergenicity

A Review of the Effects of Major Atmospheric Pollutants on Pollen Grains, Pollen Content, and Allergenicity

Size-segregated Allergenic Particles Released from Airborne Cryptomeria japonica Pollen Grains during the Yellow Sand Events within the Pollen Scattering Seasons

Release behaviour of cryptomeria japonica pollen allergenic cry J 1 and cry J 2 in rainwater containing air pollutants

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