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Lévesque L, Loy C, Lainé A, Drouin B, Chevallier P, Mantovani D. Incrementing the Frequency of Dynamic Strain on SMC-Cellularised Collagen-Based Scaffolds Affects Extracellular Matrix Remodeling and Mechanical Properties. ACS Biomater Sci Eng 2018; 4:3759-3767. [PMID: 33429603 DOI: 10.1021/acsbiomaterials.7b00395] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Notwithstanding the efforts injected in vascular tissue engineering in the past 30 years, the clinical translation of engineered artery constructs is far from being successful. One common approach to improve artery regeneration is the use of cyclic mechanical stimuli to guide cellular remodeling. However, there is a lack of information on the effect of cyclic strain on cells within a 3D environment. To this end, this work explored the effect of gradual increase in stimulation frequency on the response of human umbilical artery smooth muscle cells (HUASMCs) embedded in a 3D collagen matrix. The results demonstrate that, with an applied strain of 5%, the gradual increase of frequency from 0.1 to 1 Hz improved collagen remodeling by HUASMCs compared to samples constantly stimulated at 1 Hz. The expression of collagen, elastin and matrix metalloproteinase-2 (MMP-2) genes was similar at 7 days for gradual and 1 Hz samples which showed lower amounts than static counterparts. Interestingly the mechanical properties of the constructs, specifically the amplitude of the time constants and the elastic equilibrium modulus, were enhanced by gradual increase of frequency. Taken together, these results show an increase in collagen remodeling by the HUASMCs overtime under incremental cyclic mechanical strain. This work suggests that only the in-depth investigation of the effects of stimulation parameters on the behavior of vSMC under cyclic strain in a 3D environment could lead to the design of optimized control strategies for enhanced vascular tissue generation and maturation in bioreactors.
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Affiliation(s)
- L Lévesque
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met- Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Université Laval, Quebec, Quebec, Canada G1V 0A6
| | - C Loy
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met- Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Université Laval, Quebec, Quebec, Canada G1V 0A6
| | - A Lainé
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met- Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Université Laval, Quebec, Quebec, Canada G1V 0A6
| | - B Drouin
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met- Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Université Laval, Quebec, Quebec, Canada G1V 0A6
| | - P Chevallier
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met- Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Université Laval, Quebec, Quebec, Canada G1V 0A6
| | - D Mantovani
- Laboratory for Biomaterials and Bioengineering, Canada Research Chair I in Biomaterials and Bioengineering for the Innovation in Surgery, Department of Min-Met- Materials Engineering, Research Center of CHU de Quebec, Division of Regenerative Medicine, Université Laval, Quebec, Quebec, Canada G1V 0A6
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Abstract
The chloroniumyl cation, HCl+, has been recently identified in space from Herschel's spectra. A joint analysis of extensive vis-UV spectroscopy emission data together with a few high-resolution and high-accuracy millimiter-wave data provided the necessary rest frequencies to support the astronomical identification. Nevertheless, the analysis did not include any infrared (IR) vibration-rotation data. Furthermore, with the end of the Herschel mission, infrared observations from the ground may be one of the few available means to further study this ion in space. In this work, we provide a set of accurate rovibrational transition wavenumbers as well as a new and improved global fit of vis-UV, IR and millimiter-wave spectroscopy laboratory data, that will aid in future studies of this molecule.
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Affiliation(s)
- J L Doménech
- Molecular Physics Department, Instituto de Estructura de la Materia (IEM-CSIC), Serrano 123. E-28006 Madrid, Spain
| | - B J Drouin
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099, USA
| | - J Cernicharo
- Molecular Astrophysics Group, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Sor Juana Inés de la Cruz 3, Cantoblanco, E-28049 Madrid, Spain
| | - V J Herrero
- Molecular Physics Department, Instituto de Estructura de la Materia (IEM-CSIC). Serrano 123. 28006 Madrid, Spain
| | - I Tanarro
- Molecular Physics Department, Instituto de Estructura de la Materia (IEM-CSIC). Serrano 123. 28006 Madrid, Spain
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Drouin BJ, Miller CE, Müller HS, Cohen EA. The Rotational Spectra, Isotopically Independent Parameters, and Interatomic Potentials for the X(1)(2)Pi(3/2) and X(2)(2)Pi(1/2) States of BrO. J Mol Spectrosc 2001; 205:128-138. [PMID: 11148117 DOI: 10.1006/jmsp.2000.8252] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Observations of the rotational spectrum of BrO have been extended to include vibrational levels up to v = 8 in the X(1)(2)Pi(3/2) and v = 7 in the X(2)(2)Pi(1/2) states. The rotational spectra of isotopically enriched Br(18)O, X(1), v = 0, 1 and X(2), v = 0 have been observed as well. The spectra of all four isotopic species have been fit to a Hamiltonian in which the parameters have fixed isotopic ratios. An extensive set of isotopically independent parameters has been determined. Interatomic potentials have been derived for both the X(1) and X(2) states. The hyperfine constants and their vibrational dependencies have been determined more precisely and several of them have been determined for the first time. These are interpreted in terms of the electronic structure of the molecule. The isotope relations among the constants have provided a means of decorrelating the electron spin-rotation constant gamma from the fine-structure centrifugal distortion constant, A(D), and have allowed the first determination of an effective value for gamma. Copyright 2001 Academic Press.
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Affiliation(s)
- BJ Drouin
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, 91109-8099
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Drouin BJ, Dannemiller JJ, Kukolich SG. Structural characterization of anti- and syn-allyltricarbonyliron bromide: rotational spectra, quadrupole coupling, and density functional calculations. Inorg Chem 2000; 39:827-35. [PMID: 11272584 DOI: 10.1021/ic990884r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rotational transitions for two distinct structural isomers of allyltricarbonyliron bromide have been clearly observed in the cold molecular beam of a pulsed-beam Fourier transform microwave spectrometer. Rotational transitions exhibiting quadrupole splitting patterns for each isomer were measured for the 79Br and 81Br isotopomers. Both isomers are accidental near-prolate symmetric tops. The measured rotational constants for the 79Br isotopomer are A(anti) = 920.6148(2) MHz, B(anti) = 582.8866(12) MHz, C(anti) = 581.3027(12) MHz, A(syn) = 919.5055(1) MHz, B(syn) = 584.1865(1) MHz, and C(syn) = 581.6392(1) MHz. Analysis of the isotopic substitution data and possible transition assignments indicates that these molecules have Cs symmetry. Both isomers are found to have a dipole component along the a axis. However, the anti isomer has a "c" type dipole component, whereas a "b" dipole component is found for the syn isomer. It was found necessary to carefully analyze both rotational constants and the quadrupole coupling data in order to determine the correct assignment of dipole moment components for each isomer. This change in dipole assignments implies that there is a switch of inertial axes upon isomerization resulting from a subtle shift of the allyl center of mass coordinates, upon reorientation of the allyl ligand. The X-ray and DFT calculated structures for the anti isomer are in excellent agreement with the present data. No previous structural data for the syn isomer were available, and the present analysis strongly supports the expected conformation.
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Affiliation(s)
- B J Drouin
- Department of Chemistry, University of Arizona, Tucson 85721, USA
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Dobrowolski JA, Ho FC, Baby L, Boulay R, Drouin B, Gagnon R, Bélanger PA. Use of the inverse synthesis method for the determination of the optical constants of paper in the far infrared. Appl Opt 1986; 25:2681. [PMID: 18231542 DOI: 10.1364/ao.25.002681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
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Drouin B, Oudot P, Grillet Y, Rerolle F. [Anti-smoking campaign in an average French department, la Drôme; epidemiological analysis and prospects for the future]. Rev Pneumol Clin 1984; 40:237-242. [PMID: 6545465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The campaign against smoking requires a dynamic attitude in the field. With this in mind, a study was conducted in 14 to 16 year old school-children in the Drôme region and a questionnaire was sent to all doctors in the region. The school survey confirmed the results obtained previously in similar studies, such as the high proportion of girls who smoke and the essential role of the family. There was no valorising element associated with cigarettes in young people. The aim of the questionnaire, which was sent to all doctors registered in the Drôme region (more than 800), was to encourage them to adopt a dynamic attitude towards smoking in their professional practice. The high reply rate was encouraging, even if not all of the doctors are ready for an aggressive campaign.
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Grand A, Rigaud-Morel N, Drouin B, Boissel J, Burel H. [Electrocardiographic changes induced by pregnancy in healthy women]. Arch Mal Coeur Vaiss 1983; 76:77-86. [PMID: 6405718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Grand A, Drouin B, Ferry M, Heulin T, Murger JF. [Inefficiency of high doses of urokinase in a massive pulmonary embolism. Possible role of an oral contraceptive]. Nouv Presse Med 1978; 7:2391. [PMID: 673811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Grand A, Drouin B, Arche GJ. [Potentialization of the anticoagulant action of antivitamin K by thienylic acid]. Nouv Presse Med 1977; 6:2691. [PMID: 302935] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Drouin B, Grand A, Tabet R, Morel C. [An "unusual" ventricular tachycardia]. Coeur Med Interne 1977; 16:293-5. [PMID: 891127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Grand A, Drouin B, Ferry M, Peyredieu du Charlat G, Tabet R, Morel C. [Protection of "demand" cardiac pacemakers against exterior electromagnetic influences by a metal capsule: reality or fiction?]. Nouv Presse Med 1977; 6:855. [PMID: 846845] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Grand A, Amouroux R, Drouin B, Ferry M, Koyazounda A. [Conservative management of infected or extruded cardiac pacemakers (author's transl)]. Ann Cardiol Angeiol (Paris) 1976; 25:293-5. [PMID: 949168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Drouin B, Derrida JP, Bouvrain Y. [Acute cardiac liver simulating viral hepatitis]. Coeur Med Interne 1976; 15:295-9. [PMID: 991567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Drouin B, Graisely B, Bouvrain Y. [Aortic insufficiency and coarctation. Two observations]. Coeur Med Interne 1976; 15:109-14. [PMID: 1000910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Tubiana M, Dorfmann H, Vitale C, Drouin B, Cywiner-Golenzer C, Kahn MF, de Séze S. [Bacterial endocarditis and Libman-Sacks syndrome]. Sem Hop 1974; 50:227-36. [PMID: 4367928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Bouvrain Y, Drouin B. [Diagnosis of aortic dissection]. Nouv Presse Med 1973; 2:1305. [PMID: 4712674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Chiche P, Benaim R, Chapelle M, Drouin B, Senikies A. [Role of ischemia in left ventricular function disorders in the initial stage of myocardial infarct]. Arch Mal Coeur Vaiss 1973; 66:457-69. [PMID: 4198849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Cachera JP, Drouin B, Carpentier A, Witchitz S, Dubost C. [3 cases of staphylococcal tricuspid endocarditis treated by prosthetic valve replacement]. Arch Mal Coeur Vaiss 1972; 65:515-24. [PMID: 4627190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Drouin B. [How to conduct an epidemiological study in prolonged fever]. Rev Infirm 1971; 21:977-81. [PMID: 5211869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Chiche P, Chekler P, Drouin B. [Neuro-psychic treatment and angina pectoris. Apropos of a drug with coronary and neuro-sedative action]. Coeur Med Interne 1970; 9:519-524. [PMID: 5532198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
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