Linked Life Data

21078667

Source:http://linkedlifedata.com/resource/pubmed/id/21078667

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2011-1-24
pubmed:databankReference
pubmed:abstractText
Irreversible aggregation limits bioavailability and therapeutic activity of protein-based drugs. Here we show that an aggregation-resistant mutant can be engineered by structural homology with a non-amyloidogenic analogue and that the aggregation-resistant variant may act as an inhibitor. This strategy has successfully been applied to the amyloidogenic human calcitonin (hCT). Including only five residues from the non-amyloidogenic salmon calcitonin (sCT), we obtained a variant, polar human calcitonin (phCT), whose solution structure was shown by CD, NMR, and calculations to be practically identical to that of sCT. phCT was also observed to be a potent amyloidogenesis inhibitor of hCT when mixed with it in a 1:1 ratio. Fibrillation studies of phCT and the phCT-hCT mixture mimicked the sCT behavior in the kinetics and shapes of the fibrils with a dramatic reduction with respect to hCT. Finally, the effect of phCT alone and of the mixture on the intracellular cAMP level in T47D cells confirmed for the mutant and the mixture their calcitonin-like activity, exhibiting stimulation effects identical to those of sCT, the current therapeutic form. The strategy followed appears to be suitable to develop new forms of hCT with a striking reduction of aggregation and improved activity. Finally, the inhibitory properties of the aggregation-resistant analogue, if confirmed for other amyloidogenic peptides, may favor a new strategy for controlling fibril formation in a variety of human diseases.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1083-351X
pubmed:author
pubmed:issnType
Electronic
pubmed:day
28
pubmed:volume
286
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2707-18
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Converting the highly amyloidogenic human calcitonin into a powerful fibril inhibitor by three-dimensional structure homology with a non-amyloidogenic analogue.
pubmed:affiliation
Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche, Comprensorio Olivetti, Edificio A, 80078 Pozzuoli (Naples), Italy.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't