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Gojanovich AD, Gimenez MC, Masone D, Rodriguez TM, Dewey RA, Delgui LR, Bustos DM, Uhart M. Human Adipose-Derived Mesenchymal Stem/Stromal Cells Handling Protocols. Lipid Droplets and Proteins Double-Staining. Front Cell Dev Biol 2018; 6:33. [PMID: 29670879 PMCID: PMC5894466 DOI: 10.3389/fcell.2018.00033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 03/14/2018] [Indexed: 11/13/2022] Open
Abstract
Human Adipose-derived mesenchymal stem/stromal cells (hASCs) are of great interest because of their potential for therapeutic approaches. The method described here covers every single step necessary for hASCs isolation from subcutaneous abdominal adipose tissue, multicolor phenotyping by flow cytometry, and quantitative determination of adipogenic differentiation status by means of lipid droplets (LDs) accumulation, and Western blot analysis. Moreover, to simultaneously analyze both LDs accumulation and cellular proteins localization by fluorescence microscopy, we combined Oil Red O (ORO) staining with immunofluorescence detection. For LDs quantification we wrote a program for automatic ORO-stained digital image processing implemented in Octave, a freely available software package. Our method is based on the use of the traditional low cost neutral lipids dye ORO, which can be imaged both by bright-field and fluorescence microscopy. The utilization of ORO instead of other more expensive lipid-specific dyes, together with the fact that the whole method has been designed employing cost-effective culture reagents (standard culture medium and serum), makes it affordable for tight-budget research laboratories. These may be replaced, if necessary or desired, by defined xeno-free reagents for clinical research and applications.
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Affiliation(s)
- Aldana D Gojanovich
- Laboratorio de Integración de Señales Celulares, IHEM, Universidad Nacional de Cuyo, CONICET, Mendoza, Argentina
| | - María C Gimenez
- Laboratorio de Integración de Señales Celulares, IHEM, Universidad Nacional de Cuyo, CONICET, Mendoza, Argentina.,Facultad de de Ciencias Veterinarias y Ambientales, Universidad Juan Agustín Maza, Mendoza, Argentina
| | - Diego Masone
- Laboratorio de Integración de Señales Celulares, IHEM, Universidad Nacional de Cuyo, CONICET, Mendoza, Argentina.,Facultad de Ingeniería, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Tania M Rodriguez
- Laboratorio de Terapia génica y Células Madre, IIB-INTECH, Universidad Nacional de San Martín, CONICET, Chascomús, Argentina
| | - Ricardo A Dewey
- Laboratorio de Terapia génica y Células Madre, IIB-INTECH, Universidad Nacional de San Martín, CONICET, Chascomús, Argentina
| | - Laura R Delgui
- Laboratorio de Integración de Señales Celulares, IHEM, Universidad Nacional de Cuyo, CONICET, Mendoza, Argentina.,Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Diego M Bustos
- Laboratorio de Integración de Señales Celulares, IHEM, Universidad Nacional de Cuyo, CONICET, Mendoza, Argentina.,Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Cuyo, Mendoza, Argentina
| | - Marina Uhart
- Laboratorio de Integración de Señales Celulares, IHEM, Universidad Nacional de Cuyo, CONICET, Mendoza, Argentina
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Centres PM, Ramirez-Pastor AJ, Gimenez MC. Site-bond percolation of heteronuclear dimers irreversibly deposited on square lattices. Phys Rev E 2018; 96:062136. [PMID: 29347282 DOI: 10.1103/physreve.96.062136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Indexed: 11/07/2022]
Abstract
A generalization of the site-bond percolation problem was studied, in which pairs of neighboring sites (site dimers) and bonds are occupied irreversibly, randomly, and independently on homogeneous square surfaces. A dimer is composed of two segments and occupies two adjacent sites. Each segment can be either a conductive segment (segment type A) or a nonconductive segment (segment type B). Two types of dimers are considered, AA and AB, and the connectivity analysis is carried out by accounting only for the conductive segments (segments type A) in combination with bonds. For the combination of dimers and bonds, two different criteria were analyzed: the union or the intersection between the adsorbed percolating particles and the bonds. By means of numerical simulations and finite-size scaling analysis, the complete phase diagram separating a percolating from a non-percolating region was determined.
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Affiliation(s)
- P M Centres
- Departamento de Física, Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis-CONICET, Ejército de Los Andes 950, D5700HHW, San Luis, Argentina
| | - A J Ramirez-Pastor
- Departamento de Física, Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis-CONICET, Ejército de Los Andes 950, D5700HHW, San Luis, Argentina
| | - M C Gimenez
- IFEG, CONICET, FaMAF, UNC, Córdoba, Argentina
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Abstract
The percolation problem of irreversibly deposited heteronuclear dimers on square lattices is studied. A dimer is composed of two segments, and it occupies two adjacent adsorption sites. Each segment can be either a conductive segment (segment type A) or a nonconductive segment (segment type B). Three types of dimers are considered: AA, BB, and AB. The connectivity analysis is carried out by accounting only for the conductive segments (segments type A). The model offers a simplified representation of the problem of percolation of defective (nonideal) particles, where the presence of defects in the system is simulated by introducing a mixture of conductive and nonconductive segments. Different cases were investigated, according to the sequence of deposition of the particles, the types of dimers involved in the process, and the degree of alignment of the deposited objects. By means of numerical simulations and finite-size scaling analysis, the complete phase diagram separating a percolating from a nonpercolating region was determined for each case. Finally, the consistency of our results was examined by comparing with previous data in the literature for linear k-mers (particles occupying k adjacent sites) with defects.
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Affiliation(s)
- M C Gimenez
- Facultad de Matemática, Astronomía Física y Computación, U.N.C., Córdoba, IFEG-CONICET, Córdoba 5000, Argentina
| | - A J Ramirez-Pastor
- Departamento de Física, Instituto de Física Aplicada (INFAP), Universidad Nacional de San Luis-CONICET, Ejército de Los Andes 950, D5700HHW San Luis, Argentina
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Gimenez MC, Rodríguez Aguirre JF, Colombo MI, Delgui LR. Infectious bursal disease virusuptake involves macropinocytosis and trafficking to early endosomes in a Rab5-dependent manner. Cell Microbiol 2015; 17:988-1007. [DOI: 10.1111/cmi.12415] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 12/18/2014] [Accepted: 01/02/2015] [Indexed: 12/25/2022]
Affiliation(s)
- María C. Gimenez
- Facultad de Farmacia y Bioquímica; Universidad Juan Agustín Maza; Mendoza Argentina
- Instituto de Histología y Embriología (IHEM); Facultad de Ciencias Médicas; Universidad Nacional de Cuyo - CONICET; Mendoza Argentina
| | | | - María I. Colombo
- Facultad de Farmacia y Bioquímica; Universidad Juan Agustín Maza; Mendoza Argentina
- Instituto de Histología y Embriología (IHEM); Facultad de Ciencias Médicas; Universidad Nacional de Cuyo - CONICET; Mendoza Argentina
| | - Laura R. Delgui
- Facultad de Farmacia y Bioquímica; Universidad Juan Agustín Maza; Mendoza Argentina
- Instituto de Histología y Embriología (IHEM); Facultad de Ciencias Médicas; Universidad Nacional de Cuyo - CONICET; Mendoza Argentina
- Facultad de Ciencias Exactas y Naturales; Universidad Nacional de Cuyo; Mendoza Argentina
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Locatto ME, Fernandez MC, Caferra DA, Gimenez MC, Vidal MC, Puche RC. Respiratory alkalosis and reduced plasmatic concentration of ionized calcium in rats treated with 1,25 dihydroxycholecalciferol. Calcif Tissue Int 1984; 36:604-7. [PMID: 6098355 DOI: 10.1007/bf02405374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The daily administration of supraphysiological doses of 1,25 dihydroxycholecalciferol (0.1-2.5 micrograms/d/100 g body weight) to rats, produced respiratory alkalosis. With the doses of 0.1-0.2 micrograms/d/100 g and feeding a diet with 0.7% of calcium, calcemias did not exceed 2.75 mM, and significantly reduced plasma ionized calcium levels were measured. The latter phenomenon was found associated with increased urinary excretion of cAMP, soft tissue calcium content, and polyuria with hypostenuria, all known effects of parathyroid hormone. These effects were absent in thyroparathyroidectomized rats treated in the same fashion. Present results suggest that the stimulus of low levels of plasma ionized calcium overcomes the probably inhibitory effect of the steroid on parathyroid hormone secretion.
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