Absence of Bacterial Imprints on Struvite-containing Kidney Stones: A Structural Investigation at the Mesoscopic and Atomic Scale

Bazin, Dominique; André, G.; Weil, Raphaël; Matzen, Guy; Véron, Emmanuel; Carpentier, Xavier; Daudon, Michel

doi:10.1016/j.urology.2011.08.054

Cited by 66 publications

(51 citation statements)

References 26 publications

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“…Such structural characterization on pathological calcifications can be performed either through various classical physical techniques (Evan et al, 2007;Rao et al, 2011;Bazin et al, 2006), such as scanning electron microscopy (SEM) (Grà cia-Garcia et al, 2011;Dessombz, Mé ria et al, 2011, micro-computerized tomography (Williams et al, 2012;Kaiser et al, 2011), Fourier transform infrared (FTIR) and Raman spectroscopy (Quy Dao & Daudon, 1997;Estepa & Daudon, 1998;Guerra-Lopez et al, 2008;Wilson et al, 2010), proton induced X-ray emission (Pineda-Vargas et al, 2009), and laser ablation methods (Stepankova et al, 2013), or through techniques specific to large instruments, such as micro X-ray fluorescence (Bazin et al, 2007), micro X-ray absorption spectroscopy Carpentier et al, 2010;Nguyen et al, 2011), micro FTIR spectroscopy or neutron scattering (Bazin, André et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…SEM gave us the opportunity to perform a direct observation of the morphology and the size of the crystallites at the micrometre scale Bazin, André et al, 2012). At the nanometre scale, the average size of the nanocrystals present in the crystallites was obtained through PND (Bazin et al, 2006;Daudon et al, 2009;Bazin, André et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…At the nanometre scale, the average size of the nanocrystals present in the crystallites was obtained through PND (Bazin et al, 2006;Daudon et al, 2009;Bazin, André et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Therapy modifies cystine kidney stones at the macroscopic scale. Do such alterations exist at the mesoscopic and nanometre scale?

et al. 2014

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International audienceWith an incidence of 1:7000 births, cystinuria, the most frequent cause of stone formation among genetic diseases, represents a major medical problem. Twentyfive cystine stones randomly selected from cystinuric patients were investigated. From a crystallographic point of view, cystine stones are composed of micrometre size crystallites, which are made up of an aggregation of nanocrystals. Through scanning electron microscopy, the morphology and size of the crystallites have been described, while the size of the nanocrystals was investigated by means of powder neutron diffraction. Powder neutron diffraction analysis and/or scanning electron microscopy examination of cystine stones provide evidence that usual alkalinization by sodium bicarbonate associated with high diuresis significantly reduces the size of both nanocrystals and crystallites, while for other treatments, including alkalinizing drugs and thiol derivatives, the data suggest mainly changes in the topology of crystallites. Alkalinization with sodium bicarbonate affects cystine kidney stones at the mesoscopic and nanoscopic scales, while other medical treatments only alter their surface. Such an approach may help to assess the interaction between drugs and cystine stones in cystinuric patients

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Therapy modifies cystine kidney stones at the macroscopic scale. Do such alterations exist at the mesoscopic and nanometre scale?

et al. 2014

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“…In fact these stones are mainly composed of magnesium ammonium phosphate MgNH 4 PO 4 .6H 2 O (struvite) and calcium carbonate apatite Ca 10 (PO 4 ) 6 .CO 3 . The urine composition does not seem to be a factor inthe spontaneous formation of struvite crystals; therefore, stones containing struvite are considered associated with (UTI) (Bazin et al, 2012). They are primarily caused by urea splitting bacteria such as Proteus, Pseudomonas, Klebsiella and Staphylococcus (Macegoniuk, 2013).…”

Section: Nephrolithiasismentioning

confidence: 99%

Detection of Some Types of Bacteria in Patients with Kidney Stones and the Use of Corn Silk Extracts to Effectively Inhibit the Urease Enzyme in Klebsiella Species

Naif¹,

Ismail²

2018

Int.J.Curr.Microbiol.App.Sci

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“…He collaborated with physicists and urologists to assess infection stones due to urea splitting microorganisms, responsible for phosphate ammoniac magnesium (struvite) and carbapatite stones. Using spectrometry and neutronic diffraction, Daudon demonstrated that only carbapatite displayed bacterial imprints, since its crystals were smaller than those of struvite [51].…”

Section: Prevention Of Stone Recurrencementioning

confidence: 99%

A great contributor to the French urological science: Michel Daudon

Doré

2014

Comptes Rendus. Chimie

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The 40 years of Michel Daudon's working life in the field of urolithiasis are difficult to sum up in a few lines. His knowledge, expertise and publications in the fields of biology, chemistry, nephrology, and eventually urology have contributed to make him a national and international recognized researcher in the understanding of the complex mechanisms of urolithogenesis. His great collaboration with the community of nephrologists, kidney physiologists, biologists, and urologists, seniors or in training, has widely contributed to improve modern and complete treatments of urolithiasis, which is at the origin of complicated urinary stones causing severe consequences on renal function and true public health problems. His hard working, his willingness, and the clarity of his presentations contributed to make him a national and international recognized lecturer in France and North Africa, where he created a network connecting laboratories with clinicians. Always looking forward in his scientific field, he has established links with approved research teams, making them interested in working on urolithiasis, even though research on urolithiasis disease seems to be less important than research on cancer. ß 2014 Acadé mie des sciences. Published by Elsevier Masson SAS. All rights reserved. R É S U M É La vie de travail de Michel Daudon ne peut se ré sumer en quelques lignes. Ses compé tences en clinique, en biologie et en biochimie ont fait de lui un acteur reconnu sur le plan national et international dans la compré hension des mé canismes de la lithogenè se urinaire, source de calculs souvent complexes aux consé quences parfois graves. Il a largement contribué à la prise en charge moderne et complè te de la lithiase urinaire, en permettant aux né phrologues cliniciens et physiologistes, aux biologistes, mais aussi aux urologues sé niors et/ou en formation, de mieux cerner la complexité des calculs ré naux et leurs consé quences sur la fonction ré nale ayant un impact en santé publique. Son travail incessant, sa disponibilité et la clarté de ses exposé s ont contribué à le faire reconnaître comme un enseignant recherché par la communauté urologique aussi bien en France que dans les pays é trangers, notamment en Afrique du Nord, en cré ant des ré seaux de

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Absence of Bacterial Imprints on Struvite-containing Kidney Stones: A Structural Investigation at the Mesoscopic and Atomic Scale

Cited by 66 publications

References 26 publications

Therapy modifies cystine kidney stones at the macroscopic scale. Do such alterations exist at the mesoscopic and nanometre scale?

Therapy modifies cystine kidney stones at the macroscopic scale. Do such alterations exist at the mesoscopic and nanometre scale?

Detection of Some Types of Bacteria in Patients with Kidney Stones and the Use of Corn Silk Extracts to Effectively Inhibit the Urease Enzyme in Klebsiella Species

A great contributor to the French urological science: Michel Daudon

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