17 research outputs found
Nanobodies as novel agents for disease diagnosis and therapy
Christina G Siontorou Department of Industrial Management and Technology, University of Piraeus, Piraeus, Greece Abstract: The discovery of naturally occurring, heavy-chain only antibodies in Camelidae, and their further development into small recombinant nanobodies, presents attractive alternatives in drug delivery and imaging. Easily expressed in microorganisms and amenable to engineering, nanobody derivatives are soluble, stable, versatile, and have unique refolding capacities, reduced aggregation tendencies, and high-target binding capabilities. This review outlines the current state of the art in nanobodies, focusing on their structural features and properties, production, technology, and the potential for modulating immune functions and for targeting tumors, toxins, and microbes. Keywords: heavy chain antibodies, nanobodies, antibody expression, molecular display, formattin
Stabilized filter-supported bilayer lipid membranes (BLMs) for automated flow monitoring of compounds of clinical, pharmaceutical, environmental and industrial interest
This paper describes the results of analytical applications of
electrochemical biosensors based on bilayer lipid membranes (BLMs) Sor
the automated rapid and sensitive flow monitoring of substrates of
hydrolytic enzymes, antigens and triazine herbicides. BLM’s, composed of
mixtures of egg phosphatidylcholine (egg PC) and dipalmitoylphosphatidic
acid (DPPA), were supported on ultrafiltration membranes (glass
microfibre or polycarbonate) which were found to enhance their stability
fos flow experiments. The proteins (enzymes, antibodies) were
incorporated into a floating lipid matrix at an air-electrolyte
interface, and then a casting procedure was used to deliver the lipid
onto the filter supports for BLM formation. Injections of the analyte
were made into flowing streams of the carrier electrolyte solution and a
current transient signal was obtained with a magnitude related to the
analyte concentration. Substrates of hydrolytic enzyme reactions
(acetylcholine, urea and penicillin) could be determined at the
micromolar level with a maximum rate of 220 samples/h, whereas antigens
(thyroxin) and triazine herbicides (simazine, atrazine and propazine)
could be monitored at the nanomolar level in less than 2 min. The time
of appearance of the transient response obtained for herbicides was
increased to the order of simazine, atrazine and propazine which has
permitted analysis of these triazines in mixtures