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Evaluation of cross-reactivity between Holoptelea integrifolia and Parietaria judaica.
Int Arch Allergy Immunol. 2005 Feb; 136(2):103-12.IA

Abstract

BACKGROUND

Holoptelea integrifolia and Parietaria judaica belong to the family Urticaceae, but are geographically distantly located. H. integrifolia is an important pollen allergen of India and sensitizes almost 10% of the atopic population in Delhi. P. judaica, on the other hand, is a very dominant pollen allergen of the Mediterranean region, sensitizing almost 80% of the allergic population. Since both these important pollen allergens belong to the family Urticaceae, the objective of the present study was to assess cross-reactivity between these two pollen allergens from different geographical regions.

METHODS

Cross-reactivity between these two pollen allergens was assessed on the basis of skin prick tests and ELISA, ELISA inhibition and immunoblot inhibition studies.

RESULTS

Out of 44 atopic Indian patients skin prick tested with H. integrifolia extract, 34% were found to be sensitized. All the patients sensitized to H. integrifolia also showed varying degrees of skin positivity to P. judaica pollen extract. ELISA and ELISA inhibition studies suggested strong cross-reactivity between H. integrifolia and P. judaica pollen. Immunoblot inhibition studies revealed that 14-, 16-, 28-, 38-, 42- and 46-kDa proteins are the cross-reactive proteins in H. integrifolia and P. judaica. However, Par j 1, the major allergen of P. judaica, is absent in H. integrifolia pollen.

CONCLUSION

H. integrifolia and P. judaica pollens share cross-reactive as well as unique epitopes. The major allergen of P. judaica, Par j 1, seems to be absent in H. integrifolia pollen allergen.

Authors+Show Affiliations

Institute of Genomics and Integrative Biology, Delhi University, Delhi, India.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

15650307

Citation

Sharma, S, et al. "Evaluation of Cross-reactivity Between Holoptelea Integrifolia and Parietaria Judaica." International Archives of Allergy and Immunology, vol. 136, no. 2, 2005, pp. 103-12.
Sharma S, Panzani RC, Gaur SN, et al. Evaluation of cross-reactivity between Holoptelea integrifolia and Parietaria judaica. Int Arch Allergy Immunol. 2005;136(2):103-12.
Sharma, S., Panzani, R. C., Gaur, S. N., Ariano, R., & Singh, A. B. (2005). Evaluation of cross-reactivity between Holoptelea integrifolia and Parietaria judaica. International Archives of Allergy and Immunology, 136(2), 103-12.
Sharma S, et al. Evaluation of Cross-reactivity Between Holoptelea Integrifolia and Parietaria Judaica. Int Arch Allergy Immunol. 2005;136(2):103-12. PubMed PMID: 15650307.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of cross-reactivity between Holoptelea integrifolia and Parietaria judaica. AU - Sharma,S, AU - Panzani,R C, AU - Gaur,S N, AU - Ariano,R, AU - Singh,A B, Y1 - 2005/01/12/ PY - 2004/03/22/received PY - 2004/09/22/accepted PY - 2005/1/15/pubmed PY - 2005/4/9/medline PY - 2005/1/15/entrez SP - 103 EP - 12 JF - International archives of allergy and immunology JO - Int Arch Allergy Immunol VL - 136 IS - 2 N2 - BACKGROUND: Holoptelea integrifolia and Parietaria judaica belong to the family Urticaceae, but are geographically distantly located. H. integrifolia is an important pollen allergen of India and sensitizes almost 10% of the atopic population in Delhi. P. judaica, on the other hand, is a very dominant pollen allergen of the Mediterranean region, sensitizing almost 80% of the allergic population. Since both these important pollen allergens belong to the family Urticaceae, the objective of the present study was to assess cross-reactivity between these two pollen allergens from different geographical regions. METHODS: Cross-reactivity between these two pollen allergens was assessed on the basis of skin prick tests and ELISA, ELISA inhibition and immunoblot inhibition studies. RESULTS: Out of 44 atopic Indian patients skin prick tested with H. integrifolia extract, 34% were found to be sensitized. All the patients sensitized to H. integrifolia also showed varying degrees of skin positivity to P. judaica pollen extract. ELISA and ELISA inhibition studies suggested strong cross-reactivity between H. integrifolia and P. judaica pollen. Immunoblot inhibition studies revealed that 14-, 16-, 28-, 38-, 42- and 46-kDa proteins are the cross-reactive proteins in H. integrifolia and P. judaica. However, Par j 1, the major allergen of P. judaica, is absent in H. integrifolia pollen. CONCLUSION: H. integrifolia and P. judaica pollens share cross-reactive as well as unique epitopes. The major allergen of P. judaica, Par j 1, seems to be absent in H. integrifolia pollen allergen. SN - 1018-2438 UR - https://www.unboundmedicine.com/medline/citation/15650307/Evaluation_of_cross_reactivity_between_Holoptelea_integrifolia_and_Parietaria_judaica_ L2 - https://www.karger.com?DOI=10.1159/000083317 DB - PRIME DP - Unbound Medicine ER -