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Influence of ionic additives on triclinic calcium pyrophosphate dihydrate precipitation

Ley-Ngardigal, Kemie and Combes, Christèle and Teychené, Sébastien and Bonhomme, Christian and Coelho-Diogo, Cristina and Gras, Pierre and Rey, Christian and Biscans, Béatrice Influence of ionic additives on triclinic calcium pyrophosphate dihydrate precipitation. (2016) Crystal Growth & Design, 17 (1). 37-50. ISSN 1528-7483

(Document in English)

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Official URL: https://doi.org/10.1021/acs.cgd.6b01128


Triclinic calcium pyrophosphate dihydrate (t- CPPD) crystals are one of the two polymorphs of microcrystals that have been found in the joints of patients suffering from pseudogout. However, there is currently no treatment for inhibiting the formation of these crystals, which present a high inflammatory potential. In this context we studied in vitro the precipitation of t-CPPD in a stirred reactor under pH- and temperature-controlled conditions and determined the effect of selected biologically relevant ionic additives (Mg2+, Cu2+, Fe3+, Zn2+, S2O3 2−) on its formation. The results showed that 1 mM Fe3+, Zn2+, or Cu2+ induced the most significant changes by partly inhibiting the crystallization of t-CPPD and favoring the formation of an amorphous-CPP phase (98 wt %) in the presence of Fe3+ or a monoclinic-CPPD phase (78 or 71 wt %, respectively) in the presence of Zn2+ or Cu2+. Correlations between 31P solid-state NMR, XRD, and elemental analyses showed that the additive cations are inserted into the monoclinic-CPPD and/or amorphous-CPP phases. This study, which combines structural, morphological, and elemental analyses, paves the way toward a deeper comprehension of the role of ionic additives in preventing the formation of CPPD crystalline phases, and is a key step in long-term development of an effective therapeutic treatment

Item Type:Article
Additional Information:Thanks to ACS editors. The original PDF of the article can be found at Thermochimica Acta website : http://pubs.acs.org/doi/abs/10.1021/acs.cgd.6b01128
HAL Id:hal-01518197
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Collège de France (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Other partners > Ecole Supérieure de Physique et de Chimie Industrielles - ESPCI (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Université Pierre et Marie Curie, Paris 6 - UPMC (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:22 Nov 2017 08:33

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