98%
921
2 minutes
20
Chondrocalcinosis is a metabolic disease caused by the presence of calcium pyrophosphate dihydrate crystals in the synovial fluid. The goal of our endeavor was to find out whether short peptides could be used as a dissolving factor for such crystals. In order to identify peptides able to dissolve crystals of calcium pyrophosphate, we screened through a random library of peptides using a phage display. The first screening was designed to select phages able to bind the acidic part of alendronic acid (pyrophosphate analog). The second was a catalytic assay in the presence of crystals. The best-performing peptides were subsequently chemically synthesized and rechecked for catalytic properties. One peptide, named R25, turned out to possess some hydrolytic activity toward crystals. Its catalysis is Mg-dependent and also works against soluble species of pyrophosphate.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8510196 | PMC |
http://dx.doi.org/10.3390/molecules26195777 | DOI Listing |
J Neurosurg Case Lessons
September 2025
Department of Neurosurgery, Hospital East-Limburg, Genk, Limburg, Belgium.
Background: Calcium pyrophosphate dihydrate (CPPD) deposition disease at the craniocervical junction (CCJ) typically presents with a retro-odontoid pseudotumor. Here, the authors report a case of CPPD-induced basilar impression, causing vertebral artery (VA) dissection and hemorrhage.
Observations: A 65-year-old male presented with worsening chronic cervicalgia, occipital headaches, and unstable tandem gait.
Arthritis Care Res (Hoboken)
September 2025
Lille Catholic University, Saint-Philibert Hospital, Lille, France.
Objective: The objective was to identify factors determining acute arthritis resolution and safety with colchicine and prednisone in acute calcium pyrophosphate (CPP) crystal arthritis.
Methods: We conducted a post hoc analysis of the COLCHICORT trial, which compared colchicine and prednisone for the treatment of acute CPP crystal arthritis, using a composite outcome of secondary endpoints of the primary analysis. Factors associated with the sustained arthritis resolution with prednisone or colchicine treatment on day 3, and the occurrence of gastrointestinal adverse events (AEs) with colchicine, were examined.
Eur Heart J Cardiovasc Imaging
August 2025
Heart and Vascular Centre, Semmelweis University, Budapest, Hungary.
Aims: Inorganic pyrophosphate (PPi) is an endogenous inhibitor of soft-tissue calcification. A disturbed equilibrium between pro- and anti-mineralization agents, like extracellular phosphate (Pi) and PPi, have been implicated in the mechanism of aortic valve calcification (AVC). We aimed to investigate the association of the plasma PPi concentration and Pi/PPi ratio with the degree AVC in cardiovascular patients.
View Article and Find Full Text PDFArthritis Rheumatol
August 2025
Université Paris Cité, Inserm U1132, BIOSCAR, Hôpital Lariboisière, Paris, France.
Background: Gout due to the formation of monosodium urate (MSU) crystals and calcium pyrophosphate (CPP) deposition disease are two major types of microcrystalline pathologies in adults. They are responsible for recurrent flares that rely on interleukin (IL)-1β via activation of the NLRP3 inflammasome. Intermittent fasting (IF) is a non-pharmacological intervention that improves age-related diseases and reduces inflammation.
View Article and Find Full Text PDFBiochim Biophys Acta Biomembr
August 2025
Department of Chemistry, Faculty of Philosophy, Sciences and Letters at Ribeirão Preto, University of São Paulo, Brazil. Electronic address:
Skeletal and dental mineralization relies on a precisely regulated sequence of events culminating in apatite deposition onto collagen fibrils. Matrix vesicles (MVs), extracellular vesicles released by mineralization-competent cells, play a pivotal role in this process through the catalytic activity of alkaline phosphatase (TNAP). The lipid composition of MVs, particularly phosphatidylserine (PS)-calcium complexes, facilitates the nucleation of amorphous calcium phosphate and apatite formation.
View Article and Find Full Text PDF