PMID- 17973086 OWN - NLM STAT- MEDLINE DCOM- 20080501 LR - 20080124 IS - 0141-5492 (Print) IS - 0141-5492 (Linking) VI - 30 IP - 3 DP - 2008 Mar TI - Label-free homogeneous detection of immunoglobulin E by an aptameric enzyme subunit. PG - 421-5 AB - We have developed an aptameric enzyme subunit (AES) for immunoglobulin E (IgE) sensing. AES is an artificial enzyme subunit constructed from two different aptamers and does not require any modification. Using the AES, the target molecule can be detected by measuring enzymatic activity in homogeneous solution. We connected IgE-binding aptamer and its complementary strand to split thrombin-inhibiting aptamer. The hybrid of these two oligonucleotides inhibited thrombin activity and it decreased in the presence of IgE. We were able to detect IgE by using this AES in homogeneous solution with a detection limit of 50 pmol. FAU - Yoshida, Wataru AU - Yoshida W AD - Department of Biotechnology and Life Science, Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan. FAU - Sode, Koji AU - Sode K FAU - Ikebukuro, Kazunori AU - Ikebukuro K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20071031 PL - Netherlands TA - Biotechnol Lett JT - Biotechnology letters JID - 8008051 RN - 0 (Aptamers, Nucleotide) RN - 37341-29-0 (Immunoglobulin E) RN - EC 3.4.21.5 (Thrombin) SB - IM MH - Aptamers, Nucleotide/*chemistry/metabolism MH - Base Sequence MH - Biosensing Techniques/*methods MH - Humans MH - Immunoglobulin E/*analysis MH - Thrombin/*antagonists & inhibitors EDAT- 2007/11/02 09:00 MHDA- 2008/05/02 09:00 CRDT- 2007/11/02 09:00 PHST- 2007/09/03 00:00 [received] PHST- 2007/10/09 00:00 [accepted] PHST- 2007/11/02 09:00 [pubmed] PHST- 2008/05/02 09:00 [medline] PHST- 2007/11/02 09:00 [entrez] AID - 10.1007/s10529-007-9575-3 [doi] PST - ppublish SO - Biotechnol Lett. 2008 Mar;30(3):421-5. doi: 10.1007/s10529-007-9575-3. Epub 2007 Oct 31.