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Bermúdez J, Roque G, Calderón J, Pardo P, Sánchez M, Ramos V, Ávila C. 3D phantom for image quality assessment of mammography systems. Phys Med Biol 2023; 68:205019. [PMID: 37733054 DOI: 10.1088/1361-6560/acfc10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 09/21/2023] [Indexed: 09/22/2023]
Abstract
Objective.To present an innovative approach for the design of a 3D mammographic phantom for medical equipment quality assessment, estimation of the glandular tissue percentage in the patient's breast, and emulation of microcalcification (μC) breast lesions.Approach.Contrast-to noise ratio (CNR) measurements, as well as spatial resolution and intensity-to-glandularity calibrations under mammography conditions were performed to assess the effectiveness of the phantom. CNR measurements were applied to different groups of calcium hydroxyapatite (HA) and aluminum oxide (AO)μCs ranging from 200 to 600μm. Spatial resolution was characterized using an aluminum plate contained in the phantom and standard linear figures of merit, such as the line spread function and modulation transfer function (MTF). The intensity-to-glandularity calibration was developed using an x-ray attenuation matrix within the phantom to estimate the glandular tissue percentage in a breast with a compressed thickness of 4 cm.Main results.For the prototype studied, the minimum confidence level for detecting HAμCs is 95.4%, while for AOμCs is above 68.3%. It was also possible to determine that the MTF of the commercial mammography machine used for this study at the Nyquist frequency is 41%. Additionally, a one-to-one intensity-to-glandularity calibration was obtained and verified with Monte-Carlo simulation results.Significance.The phantom provides traditional arrangements presented in accreditation phantoms, which makes it competitive with available devices, but excelling in regarding affordability, modularity, and inlays distribution. Moreover, its design allows to be positioned in close proximity to the patient's breast during a medical screening for a simultaneous x-ray imaging, such that the features of the phantom can be used as reference values to specify characteristics of the real breast tissue, such as proportion of glandular/adipose composition and/orμC type and size lesions.
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Affiliation(s)
- J Bermúdez
- Physics Department, Universidad de los Andes, Bogotá, Colombia
| | - G Roque
- Physics Department, Universidad de los Andes, Bogotá, Colombia
| | - J Calderón
- Physics Department, Universidad de los Andes, Bogotá, Colombia
| | - P Pardo
- Physics Department, Universidad de los Andes, Bogotá, Colombia
| | - M Sánchez
- Physics Department, Universidad de los Andes, Bogotá, Colombia
| | - V Ramos
- Hospital Universitario San Ignacio (HUSI), Bogotá, Colombia
| | - C Ávila
- Physics Department, Universidad de los Andes, Bogotá, Colombia
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Abstract
There is a growing interest in the potential of mesenchymal stem cells (MSCs) for implementing regenerative medicine. We assessed the effect of intravenous administration of human bone marrow-derived MSC on the life span of a single Sprague-Dawley female rat. The treatment was started when the rat was 6 months old and the cells were administered every 2 weeks afterward. The treatment did not induce any obvious changes in body growth or behavior and the rat showed the typical age changes for this strain, except that, unlike intact counterparts, the animal did not develop mammary tumors or pituitary gland hyperplasia. The more remarkable effect of the treatment was on life span, which was 44 months compared with an average of 36 months for intact laboratory rats. We conclude that despite the low N value, it is likely that the MSC treatment was responsible for the exceptionally long survival of the rat. The potential rewards of confirming the present findings warrant further studies involving higher N values.
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Affiliation(s)
- Eduardo Mansilla
- 1 Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Buenos Aires Province Ministry of Public Health , La Plata, Argentina
| | - Gustavo Roque
- 1 Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Buenos Aires Province Ministry of Public Health , La Plata, Argentina
| | - Yolanda E Sosa
- 2 Institute for Biochemical Research (INIBIOLP), Histology B & Pathology B, School of Medicine, National University of La Plata , La Plata, Argentina
| | - Adrian Tarditti
- 1 Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Buenos Aires Province Ministry of Public Health , La Plata, Argentina
| | - Rodolfo G Goya
- 2 Institute for Biochemical Research (INIBIOLP), Histology B & Pathology B, School of Medicine, National University of La Plata , La Plata, Argentina
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Mansilla E, Marín GH, Berges M, Scafatti S, Rivas J, Núñez A, Menvielle M, Lamonega R, Gardiner C, Drago H, Sturla F, Portas M, Bossi S, Castuma MV, Peña Luengas S, Roque G, Martire K, Tau JM, Orlandi G, Tarditti A. Cadaveric bone marrow mesenchymal stem cells: first experience treating a patient with large severe burns. Burns Trauma 2015; 3:17. [PMID: 27574663 PMCID: PMC4963940 DOI: 10.1186/s41038-015-0018-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 09/05/2015] [Indexed: 11/10/2022]
Abstract
BACKGROUND In January 2005, Rasulov et al. originally published "First experience in the use of bone marrow mesenchymal stem cells (MSCs) for the treatment of a patient with deep skin burns". Here, we present the first ever treated patient with cadaveric bone marrow mesenchymal stem cells (CMSCs) in the history of Medicine. METHODS A young man, who severely burned 60 % of his total body surface with 30 % of full-thickness burns while working with a grass trimmer that exploded, was involved in the study. MSCs were obtained from the bone marrow of a cadaver donor in a routine procurement procedure of CUCAIBA, the Province of Buenos Aires, Argentina, Ministry of Health, Transplantation Agency, cultured, expanded, and applied on the burned surfaces using a fibrin spray after early escharotomy. RESULTS So far, our preliminary experience and our early results have been very impressive showing an outstanding safety data as well as some impressive good results in the use of CMSCs. CONCLUSIONS Based on all this, we think that improvements in the use of stem cells for burns might be possible in the near future and a lot of time as well as many lives could be saved by many other research teams all over the world. CMSCs will probably be a real scientific opportunity in Regenerative Medicine as well as in Transplantation.
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Affiliation(s)
- Eduardo Mansilla
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Province of Buenos Aires Ministry of Health, Transplantation Program, La Plata, Province of Buenos Aires, Argentina
| | - Gustavo H Marín
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Province of Buenos Aires Ministry of Health, Transplantation Program, La Plata, Province of Buenos Aires, Argentina
| | - Mirta Berges
- Burns and Plastic Surgery Department, San Martín Hospital, Province of Buenos Aires Ministry of Health, La Plata, Province of Buenos Aires, Argentina
| | - Silvia Scafatti
- Burns and Plastic Surgery Department, San Martín Hospital, Province of Buenos Aires Ministry of Health, La Plata, Province of Buenos Aires, Argentina
| | - Jaime Rivas
- Burns and Plastic Surgery Department, San Martín Hospital, Province of Buenos Aires Ministry of Health, La Plata, Province of Buenos Aires, Argentina
| | - Andrea Núñez
- Burns and Plastic Surgery Department, San Martín Hospital, Province of Buenos Aires Ministry of Health, La Plata, Province of Buenos Aires, Argentina
| | - Martin Menvielle
- Burns and Plastic Surgery Department, San Martín Hospital, Province of Buenos Aires Ministry of Health, La Plata, Province of Buenos Aires, Argentina
| | - Roberto Lamonega
- Burns and Plastic Surgery Department, San Martín Hospital, Province of Buenos Aires Ministry of Health, La Plata, Province of Buenos Aires, Argentina
| | - Cecilia Gardiner
- Burns and Plastic Surgery Department, San Martín Hospital, Province of Buenos Aires Ministry of Health, La Plata, Province of Buenos Aires, Argentina
| | - Hugo Drago
- Burns Hospital, Buenos Aires City, Argentina
| | | | | | | | - Maria Victoria Castuma
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Province of Buenos Aires Ministry of Health, Transplantation Program, La Plata, Province of Buenos Aires, Argentina
| | - Sandra Peña Luengas
- Department of Chemistry, Mayaguez Campus, University of Puerto Rico, Mayaguez Puerto Rico, USA
| | - Gustavo Roque
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Province of Buenos Aires Ministry of Health, Transplantation Program, La Plata, Province of Buenos Aires, Argentina
| | - Karina Martire
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Province of Buenos Aires Ministry of Health, Transplantation Program, La Plata, Province of Buenos Aires, Argentina
| | - Jose Maria Tau
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Province of Buenos Aires Ministry of Health, Transplantation Program, La Plata, Province of Buenos Aires, Argentina
| | - Gabriel Orlandi
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Province of Buenos Aires Ministry of Health, Transplantation Program, La Plata, Province of Buenos Aires, Argentina
| | - Adrian Tarditti
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Province of Buenos Aires Ministry of Health, Transplantation Program, La Plata, Province of Buenos Aires, Argentina
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Pena Luengas SL, Marin GH, Aviles K, Cruz Acuña R, Roque G, Rodríguez Nieto F, Sanchez F, Tarditi A, Rivera L, Mansilla E. Enhanced singlet oxygen production by photodynamic therapy and a novel method for its intracellular measurement. Cancer Biother Radiopharm 2015; 29:435-43. [PMID: 25490599 DOI: 10.1089/cbr.2014.1718] [Citation(s) in RCA: 15] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The generation of singlet oxygen (SO) in the presence of specific photosensitizers (PSs) or semiconductor quantum dots (QDs) and its application in photodynamic therapy (PDT) is of great interest to develop cancer therapies with no need of surgery, chemotherapy, and/or radiotherapy. This work was focused on the identification of the main factors leading to the enhancement of SO production using Rose Bengal (RB), and Methylene Blue (MB) as PS species in organic and aqueous mediums. Subsequently, the capacity of zinc oxide (ZnO), zinc sulfide (ZnS), and ZnO/ZnS core-shell QDs as well as manganese (Mn(+2)) doped ZnO and ZnS nanoparticles (NPs) as potential PS was also investigated. Many variable parameters such as type of quencher, PSs, NPs, as well as its different concentrations, light source, excitation wavelength, reaction time, distance from light source, and nature of solvent were used. The degradation kinetics of the quenchers generated by SO species and the corresponding quantum yields were determined by monitoring the photo-oxidation of the chemical quencher and measuring its disappearance by fluorometry and spectrophotometry in the presence of NPs. Small intracellular changes of SO induced by these metal Zn (zinc) NPs and PDT could execute and accelerate deadly programs in these leukemic cells, providing in this way an innovative modality of treatment. In order to perform further more specific in vitro cytotoxic studies on B-chronic lymphocytic leukemia cells exposed to Zn NPs and PDT, we needed first to measure and ascertain those possible intracellular SO variations generated by this type of treatment; for this purpose, we have also developed and tested a novel method first described by us.
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Mansilla E, Aquino VD, Roque G, Tau JM, Maceira A. Time and regeneration in burns treatment: heading into the first worldwide clinical trial with cadaveric mesenchymal stem cells. Burns 2011; 38:450-2. [PMID: 22040934 DOI: 10.1016/j.burns.2011.09.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Accepted: 09/02/2011] [Indexed: 11/29/2022]
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Mansilla E, Díaz Aquino V, Zambón D, Marin GH, Mártire K, Roque G, Ichim T, Riordan NH, Patel A, Sturla F, Larsen G, Spretz R, Núñez L, Soratti C, Ibar R, van Leeuwen M, Tau JM, Drago H, Maceira A. Could metabolic syndrome, lipodystrophy, and aging be mesenchymal stem cell exhaustion syndromes? Stem Cells Int 2011; 2011:943216. [PMID: 21716667 PMCID: PMC3118295 DOI: 10.4061/2011/943216] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2010] [Accepted: 03/22/2011] [Indexed: 12/15/2022] Open
Abstract
One of the most
important and complex diseases of modern society
is metabolic syndrome. This syndrome has not
been completely understood, and therefore an
effective treatment is not available yet. We
propose a possible stem cell mechanism involved
in the development of metabolic syndrome. This
way of thinking lets us consider also other
significant pathologies that could have similar
etiopathogenic pathways, like lipodystrophic
syndromes, progeria, and aging. All these
clinical situations could be the consequence of
a progressive and persistent stem cell
exhaustion syndrome (SCES). The main outcome of
this SCES would be an irreversible loss of the
effective regenerative mesenchymal stem cells
(MSCs) pools. In this way, the normal repairing
capacities of the organism could become
inefficient. Our point of view could open the
possibility for a new strategy of treatment in
metabolic syndrome, lipodystrophic syndromes,
progeria, and even aging: stem cell
therapies.
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Affiliation(s)
- Eduardo Mansilla
- Tissue Engineering, Regenerative Medicine and Cell Therapies Laboratory, CUCAIBA, Ministry of Health, Province of Buenos Aires, 1900 La Plata, Argentina
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Mansilla E, Spretz R, Larsen G, Nuñez L, Drago H, Sturla F, Marin GH, Roque G, Martire K, Díaz Aquino V, Bossi S, Gardiner C, Lamonega R, Lauzada N, Cordone J, Raimondi JC, Tau JM, Biasi NR, Marini JE, Patel AN, Ichim TE, Riordan N, Maceira A. Outstanding survival and regeneration process by the use of intelligent acellular dermal matrices and mesenchymal stem cells in a burn pig model. Transplant Proc 2011; 42:4275-8. [PMID: 21168681 DOI: 10.1016/j.transproceed.2010.09.132] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Accepted: 09/29/2010] [Indexed: 10/18/2022]
Abstract
A pig model with a deep large burn was used to study the regeneration process induced by mesenchymal stem cells (MSCs) and acellular pig dermal matrices, made intelligent by the combination with biodegradable nanofibers loaded with growth factors (granulocyte-macrophage colony-stimulating factor and epidermal growth factor) and coated with the anti-CD44 monoclonal antibody (intelligent acellular dermal matrices, IADMs). These IADMs are specially designed to integrate in the wound bed as new biological scaffolds as well as to specifically recruit and attach circulating and/or externally applied MSCs through the anti-CD44 antibody while delivering precise amounts of growth factors. In this way, the reparative process as well as the aesthetic and functional results were enhanced in our burn model. The animal survived, the wound was completely closed, and total regeneration of the skin was obtained without much scarring. Surprisingly, hair follicles and other skin appendages developed despite the severity and deepness of the burn. Even burned muscles and ribs seemed to have undergone a regenerative process by the end of the study. Based on these findings, we have proposed the use of IADMs and autologous, allogeneic or xenogeneic MSCs, as a new paradigm for the future treatment of large burns and probably other dermatological and cosmetic human conditions.
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Affiliation(s)
- E Mansilla
- Department of Tissue Engineering CUCAIBA, Ensenada, Buenos Aires 1925, Argentina.
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Drago H, Marín GH, Sturla F, Roque G, Mártire K, Díaz Aquino V, Lamonega R, Gardiner C, Ichim T, Riordan N, Raimondi JC, Bossi S, Samadikuchaksaraei A, van Leeuwen M, Tau JM, Núñez L, Larsen G, Spretz R, Mansilla E. The next generation of burns treatment: intelligent films and matrix, controlled enzymatic debridement, and adult stem cells. Transplant Proc 2010; 42:345-9. [PMID: 20172347 DOI: 10.1016/j.transproceed.2009.11.031] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We describe a novel technology based on nanoengineered multifunctional acellular biologic scaffolds combined with wound dressings and films of the same kind. This method allows selective delivery and release of shielded biomaterials and bioactive substances to a desired wound or damaged tissue while stimulating the selective anchoring and adhesion of endogenous circulating repairing cells, such as mesenchymal stem cells, to obtain a faster and more physiologic healing process. We also present a new controlled enzymatic debridement process for more effective burned tissue scarolysis. In light of our preliminary in vitro and in vivo data, we are convinced that these approaches can include the use of other kinds of adult stem cells, such as endometrial regenerative cells, to improve the vascularization of the constructs, with great potential in the entire tissue and organ regeneration field but especially for the treatment of severely burned patients, changing the way these lesions may be treated in the future.
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Affiliation(s)
- H Drago
- Banco de Tejidos, Hospital de Quemados, CABA, Argentina
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