Username


Password

Forgot Password?

Preview

Sign-in free and Explore the Exciting World of BiomedExperts:
  • Over 1.500.000 Profiles
  • More than 1.800 Organizations worldwide
  • State of the Art Network Visualizations
  • Manage your own Profile
  • Locate Experts in your Country/Region
  • Locate Experts in your 1. and 2. Level Network
  • Connect to Experts Worldwide

find experts for

Sign-in to see more
2003: Lathrop Amanda A; Jaradat Ziad W; Haley Tim; Bhunia Arun K
Characterization and application of a Listeria monocytogenes reactive monoclonal antibody C11E9 in a resonant mirror biosensor.
Journal of immunological methods 2003;281(1-2):119-28.
Typical detection of Listeria monocytogenes involves selective enrichment, isolation and biochemical testing. Development of antibodies to Listeria species has improved detection; however, most antibodies detect all species of Listeria. A previously developed monoclonal antibody (MAb)-C11E9 was examined for its reaction to 13 L. innocua and 40 L. monocytogenes strains representing all 13 serotypes by ELISA. Absorbance values for L. monocytogenes strains were 0.44-3.58 and for L. innocua 0.22-1.44. ELISA reactions were divided into three arbitrary groups of high (Abs 1.0 or higher), intermediate (0.6-0.99) and low (0.18-0.59). Most L. monocytogenes strains (32/41, 78%) were in the high group while only 23% (3/13) of L. innocua were in the same group. In the Western blot assay, antibody reacted with phosphate-buffered saline (PBS) extracted protein preparations of 52, 66 and 97 kDa. Ribopattern of all strains was analyzed and no clear relationship was observed for antibody reaction and ribotype of a given strain. MAb C11E9 was used in a resonant mirror biosensor (IAsys sensor), but failed to detect any viable intact L. monocytogenes cells at levels as high as 10(8) cells/ml; however, it showed binding (85-150 arc/s) with the surface protein preparations containing the 97-, 66- and 52-kDa proteins at 208 mug/ml. Binding kinetics of L. monocytogenes and L. innocua surface protein extracts showed significantly (p<0.05) higher responses than the three other Listeria species (L. ivanovii, L. welshimeri and L. grayi), which could be detected in 10-20 min. These data corroborate with ELISA results. In summary, this study suggest that MAb-C11E9 is suitable for detection of all serotypes of L. monocytogenes despite cross-reaction with L. innocua and could be used for detection of soluble protein extracts in the resonant mirror (IAsys) biosensor.

Post to CiteULike

Sign in free and see...

Visualized networks:
See your personal network in
sophisticated graphical views
GeoTargeted Searches:
Locate experts around the world
and connect with global collaborators
Research Profiles:
See the visualized research activity
of experts around the globe
Sign-in to see more