PMID- 9273358 OWN - NLM STAT- MEDLINE DCOM- 19970822 LR - 20191102 IS - 0022-2143 (Print) IS - 0022-2143 (Linking) VI - 127 IP - 3 DP - 1996 Mar TI - Molecular cloning and expression of a recombinant Aspergillus fumigatus protein Asp f II with significant immunoglobulin E reactivity in allergic bronchopulmonary aspergillosis. PG - 253-62 AB - The cDNA of Aspergillus fumigatus encoding an allergen was cloned and expressed in Escherichia coli. The 987 bp long cDNA clone expressed a recombinant protein Asp f II of 34 kd. This protein exhibited binding to immunoglobulin E (IgE) in the serum samples from patients with allergic bronchopulmonary aspergillosis (ABPA). The patients with ABPA and central bronchiectasis demonstrated high levels of serum IgE antibodies, whereas patients with ABPA without central bronchiectasis, patients with asthma and Aspergillus skin test reactivity but no evidence of ABPA, and patients with aspergilloma showed only low levels of IgE antibody to Asp f II. In two-dimensional electrophoresis, a native antigen electroeluted from an A. fumigatus culture filtrate antigen preparation showed an isoelectric point and molecular weight similar to that of Asp f II. In a competitive enzyme-linked immunosorbent assay (ELISA), the IgE antibody reactivity of Asp f II with patient serum samples could be significantly inhibited by culture filtrate antigens of A. fumigatus. These results indicate that Asp f II has immunologic reactivities comparable to those of native A. fumigatus antigens. The recombinant Asp f II can be expressed in E. coli in large quantities and should prove useful as a standardized allergen for sensitive and specific immunodiagnosis of ABPA, especially in patients with central bronchiectasis. FAU - Banerjee, B AU - Banerjee B AD - Department of Medicine, Medical College of Wisconsin, Milwaukee, USA. FAU - Kurup, V P AU - Kurup VP FAU - Phadnis, S AU - Phadnis S FAU - Greenberger, P A AU - Greenberger PA FAU - Fink, J N AU - Fink JN LA - eng SI - GENBANK/U20722 PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PL - United States TA - J Lab Clin Med JT - The Journal of laboratory and clinical medicine JID - 0375375 RN - 0 (Antibodies, Fungal) RN - 0 (DNA, Complementary) RN - 0 (Fungal Proteins) RN - 0 (Molecular Probes) RN - 0 (Recombinant Proteins) RN - 0 (allergen Asp f 2, Aspergillus fumigatus) RN - 37341-29-0 (Immunoglobulin E) SB - IM MH - Animals MH - Antibodies, Fungal/immunology MH - Antigen-Antibody Reactions MH - Aspergillosis, Allergic Bronchopulmonary/blood/*immunology MH - Aspergillus/metabolism MH - Base Sequence MH - *Cloning, Molecular MH - DNA, Complementary/genetics MH - Fungal Proteins/*genetics/*immunology MH - Humans MH - Immunoglobulin E/*immunology MH - Molecular Probes/genetics MH - Molecular Sequence Data MH - Rabbits MH - Recombinant Proteins EDAT- 1996/03/01 00:00 MHDA- 1996/03/01 00:01 CRDT- 1996/03/01 00:00 PHST- 1996/03/01 00:00 [pubmed] PHST- 1996/03/01 00:01 [medline] PHST- 1996/03/01 00:00 [entrez] AID - S0022-2143(96)90093-1 [pii] AID - 10.1016/s0022-2143(96)90093-1 [doi] PST - ppublish SO - J Lab Clin Med. 1996 Mar;127(3):253-62. doi: 10.1016/s0022-2143(96)90093-1.