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Rosa PMDS, Guedes PHE, Garcia JM, Oliveira CS. Cytoplasmic granules in bovine oocytes do not affect embryonic or fetal development. ZYGOTE 2024; 32:28-37. [PMID: 38047350 DOI: 10.1017/s0967199423000576] [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] [Indexed: 12/05/2023]
Abstract
Oocyte cytoplasmic evaluation is based on homogeneity and granular appearance. Our study investigated if a granular cytoplasm, highly heterogeneous, would affect oocyte competence in bovine. In two experiments, bovine cumulus-oocyte complexes (COCs) with homogeneous cytoplasm (control, CC) and granulated cytoplasm (granular, GC) were selected from a regular pool of COCs. Experiment 1 was performed with slaughterhouse ovaries, and Experiment 2 was carried out in Girolando COCs obtained from ovum pick-up. Granular oocytes had higher caspase 3 levels (66.17 ± 11.61 vs 172.08 ± 16.95, P < 0.01) and similar GAP junction activity (5.64 ± 0.45 vs 6.29 ± 0.29). ZAR1 relative mRNA amount was lower in granular oocytes (178.27 ± 151.63 vs 0.89 ± 0.89, P = 0.01) and no effect was detected for MATER, PPP2R1A, ENY2, IGF2R, and BMP15 genes. Despite molecular differences, no detrimental effect was detected on oocyte competence in GC oocytes. Cleavage (Experiment 1: 59.52 ± 7.21% vs 59.79 ± 6.10% and Experiment 2: 68.88 ± 4.82 vs 74.41 ± 5.89%) and blastocyst (Experiment 1: 29.28 ± 4.14% vs 23.15 ± 2.96% and Experiment 2: 21.11 ± 3.28% vs 21.02 ± 6.08%) rates were similar between CC and GC (Experiments 1 and 2, respectively). Post-transfer embryo development revealed that pregnancy (CC: 24.27 ± 9.70% vs GC: 26.31 ± 7.23%) and calving (23.68% vs 33.33%) rates and fetal growth were not affected by the presence of cytoplasmic granules. Our results demonstrated that oocytes with granular cytoplasm present equivalent efficiency for IVF and calf production compared with homogenous cytoplasm oocytes. This could be observed through similar cleavage, blastocyst rates, and fetal growth development. In addition to differences in oocyte gene expression related to oocyte quality, it seems not to affect oocyte developmental competence.
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Affiliation(s)
- Paola Maria da Silva Rosa
- Embrapa Dairy Cattle, 610 Eugenio do Nascimento Ave, Juiz de Fora, MG, Brazil36038-330
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Jaboticabal, SP14884-900, Brazil
| | | | - Joaquim Mansano Garcia
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Jaboticabal, SP14884-900, Brazil
| | - Clara Slade Oliveira
- Embrapa Dairy Cattle, 610 Eugenio do Nascimento Ave, Juiz de Fora, MG, Brazil36038-330
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Jaboticabal, SP14884-900, Brazil
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da Silva Nunes Barreto R, da Silva Júnior LN, Henrique Doná Rodrigues Almeida G, de Oliveira Horvath-Pereira B, da Silva TS, Garcia JM, Smith LC, Carreira ACO, Miglino MA. Placental scaffolds as a potential biological platform for embryonic stem cells differentiation into hepatic-like cells lineage: A pilot study. Tissue Cell 2023; 84:102181. [PMID: 37515966 DOI: 10.1016/j.tice.2023.102181] [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: 05/21/2023] [Revised: 07/20/2023] [Accepted: 07/21/2023] [Indexed: 07/31/2023]
Abstract
Hepatic microenvironment plays an essential role in liver regeneration, providing the necessary conditions for cell proliferation, differentiation and tissue rearrangement. One of the key factors for hepatic tissue reconstruction is the extracellular matrix (ECM), which through collagenous and non-collagenous proteins provide a three-dimensional structure that confers support for cell adhesion and assists on their survival and maintenance. In this scenario, placental ECM may be eligible for hepatic tissue reconstruction, once these scaffolds hold the major components required for cell support. Therefore, this preliminary study aimed to access the possibility of mouse embryonic stem cells differentiation into hepatocyte-like cells on placental scaffolds in a three-dimensional dynamic system using a Rotary Cell Culture System. Following a four-phase differentiation protocol that simulates liver embryonic development events, the preliminary results showed that a significant quantity of cells adhered and interacted with the scaffold through outer and inner surfaces. Positive immunolabelling for alpha fetus protein and CK7 suggest presence of hepatoblast phenotype cells, and CK18 and Albumin positive immunolabelling suggest the presence of hepatocyte-like phenotype cells, demonstrating the presence of a heterogeneous population into the recellularized scaffolds. Periodic Acid Schiff-Diastase staining confirmed the presence of glycogen storage, indicating that differentiate cells acquired a hepatic-like phenotype. In conclusion, these preliminary results suggested that mouse placental scaffolds might be used as a biological platform for stem cells differentiation into hepatic-like cells and their establishment, which may be a promissing biomaterial for hepatic tissue reconstruction.
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Affiliation(s)
| | | | | | | | - Thamires Santos da Silva
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil
| | - Joaquim Mansano Garcia
- Department of Preventive Veterinary Medicine and Animal Reproduction, Faculty of Agricultural and Veterinary Sciences, State University of São Paulo, Jaboticabal, SP, Brazil
| | - Lawrence Charles Smith
- Centre de Recherche en Reproduction et Fertilité, University of Montreal, Montreal, QC, Canada
| | - Ana Claudia Oliveira Carreira
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil; Centre of Human and Natural Sciences, Federal University of ABC, Santo André, SP, Brazil
| | - Maria Angelica Miglino
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil.
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3
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Garcia JM, Caplins BW, Chiaramonti AN, Miaja-Avila L, Sanford NA. A Comprehensive Examination of Aluminum Oxide (Al2O3) Using Extreme and Near Ultraviolet Laser-Assisted Atom Probe Tomography. Microsc Microanal 2023; 29:83-84. [PMID: 37613045 DOI: 10.1093/micmic/ozad067.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- J M Garcia
- National Institute of Standards and Technology, Boulder, CO, United States
| | - B W Caplins
- National Institute of Standards and Technology, Boulder, CO, United States
| | - A N Chiaramonti
- National Institute of Standards and Technology, Boulder, CO, United States
| | - L Miaja-Avila
- National Institute of Standards and Technology, Boulder, CO, United States
| | - N A Sanford
- National Institute of Standards and Technology, Boulder, CO, United States
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4
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Rossi GF, Bastos NM, Vrisman DP, Rodrigues NN, Vantini R, Garcia JM, Dias EAR, Simili FF, Guimarães AL, Canesin RC, Mercadante MEZ, Freitas-Dell'Aqua CDP, de Athayde FRF, Monteiro FM, Mingoti GZ. Growth performance, reproductive parameters and fertility measures in young Nellore bulls with divergent feed efficiency. Anim Reprod 2022; 19:e20220053. [PMID: 36313599 PMCID: PMC9613353 DOI: 10.1590/1984-3143-ar2022-0053] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Accepted: 09/26/2022] [Indexed: 11/24/2022] Open
Abstract
The growth, sexual maturity and fertility-related parameters related of young Nellore bulls with divergent residual feed intake (RFI) raised on pasture were evaluated. After classification of 48 young males as low and high RFI (more and less efficient, respectively), the animals were evaluated for growth and reproductive parameters at 28-day intervals from 14.3 to 24.6 months of age. The semen was cryopreserved in the last sampling and fresh and post-thaw semen samples were evaluated. Low RFI bulls exhibited higher initial and final body weight (P < 0.05), but feed intake, body condition score and growth measures evaluated by carcass ultrasound were unaffected by RFI (P > 0.05). The scrotal circumference, sperm concentration, defects, and quality of fresh semen, and ultrasonographic testicular characteristics were unaffected by RFI (P > 0.05). However, velocity parameters such as average path and curvilinear velocities determined by computer-assisted sperm analysis of thawed semen submitted to the rapid thermoresistance test were improved (P < 0.05) in low RFI bulls, but this improvement in quality did not enhance in vitro sperm fertilizing ability. Our results demonstrated significant differences in metabolism and growth performance between bulls of divergent RFI. In addition, there was slight improvement in the semen quality of bulls with low RFI bulls, but this did not enhance in vitro fertilizing ability. Selection of beef bulls for RFI can be performed, which will result in economic benefits by improving the growth performance of the animals without affecting reproductive parameters.
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Affiliation(s)
- Guilherme Fazan Rossi
- Faculdade de Ciências Agrárias e Veterinárias, Departamento de Radiologia, Reprodução e Saúde Única, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - Natália Marins Bastos
- Faculdade de Ciências Agrárias e Veterinárias, Departamento de Radiologia, Reprodução e Saúde Única, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - Dayane Priscila Vrisman
- Faculdade de Ciências Agrárias e Veterinárias, Departamento de Radiologia, Reprodução e Saúde Única, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - Naiara Nantes Rodrigues
- Faculdade de Ciências Agrárias e Veterinárias, Departamento de Radiologia, Reprodução e Saúde Única, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - Roberta Vantini
- Faculdade de Ciências Agrárias e Veterinárias, Departamento de Radiologia, Reprodução e Saúde Única, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | - Joaquim Mansano Garcia
- Faculdade de Ciências Agrárias e Veterinárias, Departamento de Radiologia, Reprodução e Saúde Única, Universidade Estadual Paulista, Jaboticabal, SP, Brasil
| | | | | | | | | | | | - Camila de Paula Freitas-Dell'Aqua
- Departamento de Reprodução Animal e Radiologia Veterinária, Faculdade de Medicina Veterinária e Zootecnia, Universidade Estadual Paulista, Botucatu, SP, Brasil
| | | | - Fabio Morato Monteiro
- Faculdade de Ciências Agrárias e Veterinárias, Departamento de Radiologia, Reprodução e Saúde Única, Universidade Estadual Paulista, Jaboticabal, SP, Brasil.,Centro de Pesquisa de Bovinos de Corte, Instituto de Zootecnia, Sertãozinho, SP, Brasil
| | - Gisele Zoccal Mingoti
- Faculdade de Ciências Agrárias e Veterinárias, Departamento de Radiologia, Reprodução e Saúde Única, Universidade Estadual Paulista, Jaboticabal, SP, Brasil.,Departamento de Produção e Saúde Animal, Faculdade de Medicina Veterinária, Universidade Estadual Paulista, Araçatuba, SP, Brasil
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Batista VF, de Sá Schiavo Matias G, Carreira ACO, Smith LC, Rodrigues R, Araujo MS, Souza Silva DR, Moraes FDJ, Garcia JM, Miglino MA. Recellularized rat testis scaffolds with embryoid bodies cells: a promising approach for tissue engineering. Syst Biol Reprod Med 2022; 68:44-54. [PMID: 35086406 DOI: 10.1080/19396368.2021.2007554] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Tissue engineering is gaining use to investigate the application of its techniques for infertility treatment. The use of pluripotent embryonic cells for in vitro production of viable spermatozoa in testicular scaffolds is a promising strategy that could solve male infertility. Due to cell-extracellular matrix (ECM) interactions, here we aim to investigate the differentiation of embryoid bodies (EBs) in cultured into decellularized rat testis scaffolds. Decellularized testis (P = 0.019) with a low concentration of gDNA (30.58 mg/ng tissue) was obtained by sodium dodecyl sulfate perfusion. The structural proteins (collagens type I and III) and the adhesive glycoproteins of ECM (laminin and fibronectin) were preserved according to histological and scanning electron microscopy (SEM) analyses. Then, decellularized rat testis were cultured for 7 days with EB, and EB mixed with retinoic acid (RA) in non-adherent plates. By SEM, we observe that embryonic stem cells adhered in the decellularized testis ECM. By immunofluorescence, we verified the positive expression of HSD17B3, GDNF, ACRV-1, and TRIM-36, indicating their differentiation using RA in vitro, reinforcing the possibility of EB in male germ cell differentiation. Finally, recellularized testis ECM may be a promising tool for future new approaches for testicular cell differentiation applied to assisted reproduction techniques and infertility treatment.Abbreviations: ACRV-1: Acrosomal vesicle protein 1; ATB: Penicillin-streptomycin; DAPI: 4,6-Diamidino-2-phenylindole; EB: Embryoid bodies; ECM: Extracellular matrix; ESCs: Pluripotent embryonic stem cells; GAGs: Glycosaminoglycans; gDNA: Genomic DNA; GDNF: Glial cell line-derived neurotrophic factor; H&E: Hematoxylin and eosin; HSD17B3: 17-beta-Hydroxysteroid dehydrogenase type 3; PBS: Phosphate-buffered saline; PGCLCs: Primordial germ-cell-like cells; RA: Retinoic acid; SDS: Sodium dodecyl sulfate; SEM: Scanning electron microscopy; SSCs: Spermatogonial stem cells; TRIM-36: Tripartite Motif Containing 36.
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Affiliation(s)
- Vitória Frias Batista
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Gustavo de Sá Schiavo Matias
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | | | - Lawrence Charles Smith
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil.,Centre de Recherche En Reproduction Et Fertilité, Université de Montréal), Saint-Hyacinthe, Canada
| | - Rafaela Rodrigues
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Michelle Silva Araujo
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Dara Rubia Souza Silva
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Felipe de Jesus Moraes
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Joaquim Mansano Garcia
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil.,Department of Preventive Veterinary Medicine and Animal Reproduction (Reproduction), São Paulo State University (UNESP), São Paulo, Brazil
| | - Maria Angelica Miglino
- Department of Surgery, School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
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6
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Tavares MR, de Castro RVG, Pieri NCG, Cruz NRN, Martins DS, Ambrósio CE, Garcia JM, Camplesi AC, Bressan FF, Toniollo GH. Identification of hepatic progenitor cells in the canine fetal liver. Res Vet Sci 2020; 133:239-245. [PMID: 33032111 DOI: 10.1016/j.rvsc.2020.09.012] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 06/08/2020] [Accepted: 09/14/2020] [Indexed: 10/23/2022]
Abstract
The liver plays essential roles in human and animal organisms, such as the storage, release, metabolism, and elimination of various endogenous or exogenous substances. Although its vital importance, few treatments are yet available when a hepatic failure occurs, and hence, the use of stem cells has arisen as a possible solution for both human and veterinary medicines. Previous studies have shown the existence of hepatic progenitor cells in human fetuses that were positive for EpCAM and NCAM. There is limited evidence, however, further identification and characterization of these cells in other species. Considering the similarity between dogs and humans regarding physiology, and also the increasing importance of developing new treatments for both veterinary and translational medicine, this study attempted to identify hepatic progenitor cells in canine fetal liver. For that, livers from canine fetuses were collected, cells were isolated by enzymatic digestion and cultured. Cells were characterized regarding morphology and expression of EpCAM, NCAM, Nestin, and Thy-1/CD90 markers. Our results suggest that it is possible to identify hepatic progenitor cells in the canine fetal liver; however, for therapeutic use, further techniques for cellular isolation and culture are necessary to obtain enriched populations of hepatic progenitors from the canine fetal liver.
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Affiliation(s)
- M R Tavares
- Department of Preventive Veterinary Medicine and Animal Reproduction, Faculty of Agricultural and Animal Science, State University of São Paulo, Jaboticabal/SP, Brazil.
| | - R V G de Castro
- Department of Preventive Veterinary Medicine and Animal Reproduction, Faculty of Agricultural and Animal Science, State University of São Paulo, Jaboticabal/SP, Brazil; Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga/SP, Brazil
| | - N C G Pieri
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga/SP, Brazil
| | - N R N Cruz
- Department of Veterinary Clinical and Surgery, Faculty of Agricultural and Animal Science, State University of São Paulo, Jaboticabal/SP, Brazil
| | - D S Martins
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga/SP, Brazil; Post-Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo/SP, Brazil
| | - C E Ambrósio
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga/SP, Brazil; Post-Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo/SP, Brazil
| | - J M Garcia
- Department of Preventive Veterinary Medicine and Animal Reproduction, Faculty of Agricultural and Animal Science, State University of São Paulo, Jaboticabal/SP, Brazil
| | - A C Camplesi
- Department of Veterinary Clinical and Surgery, Faculty of Agricultural and Animal Science, State University of São Paulo, Jaboticabal/SP, Brazil
| | - F F Bressan
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga/SP, Brazil; Post-Graduate Program in Anatomy of Domestic and Wild Animals, Faculty of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo/SP, Brazil..
| | - G H Toniollo
- Department of Preventive Veterinary Medicine and Animal Reproduction, Faculty of Agricultural and Animal Science, State University of São Paulo, Jaboticabal/SP, Brazil
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Baracho Trindade Hill A, Speri Alves AA, da Silva Nunes Barreto R, Fernandes Bressan F, Miglino MA, Mansano Garcia J. Placental scaffolds have the ability to support adipose-derived cells differentiation into osteogenic and chondrogenic lineages. J Tissue Eng Regen Med 2020; 14:1661-1672. [PMID: 32893450 DOI: 10.1002/term.3124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/29/2020] [Accepted: 08/25/2020] [Indexed: 12/23/2022]
Abstract
Prudent choices of cell sources and biomaterials, as well as meticulous cultivation of the tissue microenvironment, are essential to improving outcomes of tissue engineering treatments. With the goal of providing a high-quality alternative for bone and cartilage tissue engineering, we investigated the capability of bovine placental scaffolds to support adipose-derived cell differentiation into osteogenic and chondrogenic lineages. Decellularized bovine placenta, a high-quality scaffold with practical scalability, was chosen as the biomaterial due to its rich extracellular matrix, well-developed vasculature, high availability, low cost, and simplicity of collection. Adipose-derived cells were chosen as the cell source as they are easy to isolate, nontumorigenic, and flexibly differentiable. The bovine model was chosen for its advantages in translational medicine over the mouse model. When seeded onto the scaffolds, the isolated cells adhered to the scaffolds with cell projections, established cell-scaffold communication and proliferated while maintaining cell-cell communication. Throughout a 21-day culture period, osteogenically differentiated cells secreted mineralized matrix, and calcium deposits were observed throughout the scaffold. Under chondrogenic specific differentiation conditions, the cells modified their morphology from fibroblast-like to round cells and cartilage lacunas were observed as well as the deposit of cartilaginous matrix on the placental scaffolds. This experiment provides evidence, for the first time, that bovine placental scaffolds have the potential to support bovine mesenchymal stem cell adherence and differentiation into osteogenic and chondrogenic lineages. Therefore, the constructed material could be used for bone and cartilage tissue engineering.
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Affiliation(s)
- Amanda Baracho Trindade Hill
- Reproduction and Fertility Research Center, University of Montreal, Saint-Hyacinthe, QC, Canada.,Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Jaboticabal, Brazil
| | | | | | - Fabiana Fernandes Bressan
- Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering, University of São Paulo, Pirassununga, Brazil
| | - Maria Angelica Miglino
- School of Veterinary Medicine and Animal Sciences, University of São Paulo, São Paulo, Brazil
| | - Joaquim Mansano Garcia
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Jaboticabal, Brazil
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8
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Trindade Hill AB, Speri Alves AA, da Silva Nunes Barreto R, Bressan FF, Miglino MA, Murphy BD, Garcia JM. Placental scaffolds support osteogenic and chondrogenic differentiation of bovine adipose-derived cells. Placenta 2019. [DOI: 10.1016/j.placenta.2019.06.344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
Mesenchymal stem cells (MSCs) have received a great deal of attention over the past 20 years mainly because of the results that showed regeneration potential and plasticity that were much stronger than expected in prior decades. Recent findings in this field have contributed to progress in the establishment of cell differentiation methods, which have made stem cell therapy more clinically attractive. In addition, MSCs are easy to isolate and have anti-inflammatory and angiogenic capabilities. The use of stem cell therapy is currently supported by scientific literature in the treatment of several animal health conditions. MSC may be administered for autologous or allogenic therapy following either a fresh isolation or a thawing of a previously frozen culture. Despite the fact that MSCs have been widely used for the treatment of companion and sport animals, little is known about their clinical and biotechnological potential in the economically relevant livestock industry. This review focuses on describing the key characteristics of potential applications of MSC therapy in livestock production and explores the themes such as the concept, culture, and characterization of mesenchymal stem cells; bovine mesenchymal stem cell isolation; applications and perspectives on commercial interests and farm relevance of MSC in bovine species; and applications in translational research.
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Affiliation(s)
- Amanda Baracho Trindade Hill
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Via de Acesso Professor Paulo Donato Castelane - Vila Industrial, s/n, Jaboticabal, SP, 14884-900, Brazil. .,Centre de Recherche en Reproduction et Fertilité, Faculté de Médecine Vétérinaire, Université de Montréal, Saint Hyacinthe, QC, J2S 7C6, Canada.
| | - Fabiana Fernandes Bressan
- Campus Fernando Costa, University of São Paulo, Av. Duque de Caxias Norte, 225 - Zona Rural, Pirassununga, SP, 13635-900, Brazil
| | - Bruce D Murphy
- Centre de Recherche en Reproduction et Fertilité, Faculté de Médecine Vétérinaire, Université de Montréal, Saint Hyacinthe, QC, J2S 7C6, Canada
| | - Joaquim Mansano Garcia
- Department of Preventive Veterinary Medicine and Animal Reproduction, São Paulo State University, Via de Acesso Professor Paulo Donato Castelane - Vila Industrial, s/n, Jaboticabal, SP, 14884-900, Brazil
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10
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Trindade AB, Therrien J, Garcia JM, Smith LC. Mesenchymal-like stem cells in canine ovary show high differentiation potential. Cell Prolif 2017; 50. [PMID: 28990287 DOI: 10.1111/cpr.12391] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 08/22/2017] [Indexed: 12/11/2022] Open
Abstract
OBJECTIVES Recent studies have reported the existence of stem cells in ovarian tissue that show enhanced proliferative and differentiation potential compared to other adult tissues. Based on this evidence, we hypothesized that ovarian tissue contained mesenchymal-like stem cells (MSC) that could be isolated using a novel rapid plastic adhesion technique. MATERIALS AND METHODS We established MSC lines derived from ovarian and adipose tissue based on their ability to rapidly adhere to plastic culture dishes in the first 3 hours after plating and studied their potentiality in terms of molecular markers and differentiation capacity. RESULTS Morphological and kinetic properties of in vitro cultured ovarian MSC were similar to adipose-derived MSC, and both reached senescence after similar passage numbers. Ovarian-derived MSC expressed mesenchymal (CD90 and CD44) but not haematopoietic markers (CD34 and CD45), indicating similarity to adipose-derived MSC. Moreover, ovarian-derived MSC expressed NANOG, TERT, SOX2, OCT4 and showed extensive capacity to differentiate not only into adipogenic, osteogenic and chondrogenic tissue but also towards neurogenic and endodermal lineages and even precursors of primordial germ cells. CONCLUSION These results show for the first time the derivation of ovarian cells with the molecular properties of MSC as well as wide differentiation potential. Canine ovarian tissue is accessible, expandable, multipotent and has high plasticity, holding promise for applications in regenerative medicine.
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Affiliation(s)
- A B Trindade
- Centre de recherche en reproduction et fertilité, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, QC, Canada.,Faculdade de Ciências Agrarias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brazil
| | - J Therrien
- Centre de recherche en reproduction et fertilité, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, QC, Canada
| | - J M Garcia
- Faculdade de Ciências Agrarias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brazil
| | - L C Smith
- Centre de recherche en reproduction et fertilité, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, QC, Canada
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Monteiro CAS, Leal GR, Saraiva HFRDA, Garcia JM, Camargo AJDR, Serapião RV, Nogueira LAG, Rodrigues ALR, Oliveira CS. Short term culture with cAMP modulators before vitrification significantly improve actin integrity in bovine oocytes. Livest Sci 2017. [DOI: 10.1016/j.livsci.2017.01.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yahlali N, Garcia JM, Díaz J, Soriano A, Fernandes LMP. Ageing studies of TPB in noble gas detectors for dark matter and neutrinoless ββ decay searches. Spectrochim Acta A Mol Biomol Spectrosc 2017; 172:109-114. [PMID: 27160970 DOI: 10.1016/j.saa.2016.04.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 03/03/2016] [Accepted: 04/08/2016] [Indexed: 06/05/2023]
Abstract
Noble gases (Xe, Ar, Kr) are very attractive as detector media in Dark Matter search and neutrinoless double-beta decay experiments. However, the detection of their scintillation light (in the VUV spectral region) requires shifting the VUV light to visible light, where standard photosensors are more efficient. Tetraphenyl butadiene (TPB) is widely used as wavelength shifter, absorbing the VUV light and re-emitting in the blue region (~430nm). TPB is an organic molecule that may degrade due to exposure to environmental agents and also to ultraviolet light. In this work, we present TPB ageing studies due to exposure to VUV light, aiming at quantifying the reduction of the absolute fluorescence yield of TPB coatings of several thicknesses (130nm, 260nm, 390nm, 1600nm), exposed to various doses of VUV light at 170nm (similar to the Xe scintillation). In our setup, the VUV light is produced from a vacuum monochromator coupled to a deuterium lamp. The VUV exposure in our setup is compared to the exposure obtained in the electroluminescent gaseous Xe TPC of the NEXT-100 experiment for neutrinoless double-beta decay search.
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Affiliation(s)
- N Yahlali
- Instituto de Física Corpuscular (IFIC), CSIC & Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain.
| | - J M Garcia
- Instituto de Física Corpuscular (IFIC), CSIC & Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
| | - J Díaz
- Instituto de Física Corpuscular (IFIC), CSIC & Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
| | - A Soriano
- Instituto de Ciencia Molecular (ICMOL), Universitat de València, Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
| | - L M P Fernandes
- LIBPhys, Department of Physics, University of Coimbra, 3004-516 Coimbra, Portugal
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Campanholi SP, Monteiro FM, Ribeiro Dias EA, Mercadante MEZ, de Paz CCP, Dell'Aqua Junior JA, Papa FO, Dell'Aqua CDPF, Vantini R, Garcia JM. Effect of seminal plasma removal before cryopreservation of bovine semen obtained by electroejaculation on semen quality and in vitro fertility. Theriogenology 2017; 89:114-121. [DOI: 10.1016/j.theriogenology.2016.10.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 10/03/2016] [Accepted: 10/09/2016] [Indexed: 02/06/2023]
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Garcia JM, Teodoro F, Cerdeira R, Coelho LMR, Kumar P, Carvalho MG. Developing a methodology to predict PM10 concentrations in urban areas using generalized linear models. Environ Technol 2016; 37:2316-2325. [PMID: 26839052 DOI: 10.1080/09593330.2016.1149228] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 01/25/2016] [Indexed: 06/05/2023]
Abstract
A methodology to predict PM10 concentrations in urban outdoor environments is developed based on the generalized linear models (GLMs). The methodology is based on the relationship developed between atmospheric concentrations of air pollutants (i.e. CO, NO2, NOx, VOCs, SO2) and meteorological variables (i.e. ambient temperature, relative humidity (RH) and wind speed) for a city (Barreiro) of Portugal. The model uses air pollution and meteorological data from the Portuguese monitoring air quality station networks. The developed GLM considers PM10 concentrations as a dependent variable, and both the gaseous pollutants and meteorological variables as explanatory independent variables. A logarithmic link function was considered with a Poisson probability distribution. Particular attention was given to cases with air temperatures both below and above 25°C. The best performance for modelled results against the measured data was achieved for the model with values of air temperature above 25°C compared with the model considering all ranges of air temperatures and with the model considering only temperature below 25°C. The model was also tested with similar data from another Portuguese city, Oporto, and results found to behave similarly. It is concluded that this model and the methodology could be adopted for other cities to predict PM10 concentrations when these data are not available by measurements from air quality monitoring stations or other acquisition means.
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Affiliation(s)
- J M Garcia
- a Escola Superior de Tecnologia de Setúbal , Instituto Politécnico , Setúbal , Portugal
| | - F Teodoro
- a Escola Superior de Tecnologia de Setúbal , Instituto Politécnico , Setúbal , Portugal
- b CEMAT, Instituto Superior Técnico , Lisboa , Portugal
| | - R Cerdeira
- a Escola Superior de Tecnologia de Setúbal , Instituto Politécnico , Setúbal , Portugal
| | - L M R Coelho
- a Escola Superior de Tecnologia de Setúbal , Instituto Politécnico , Setúbal , Portugal
| | - Prashant Kumar
- c Department of Civil and Environmental Engineering, Faculty of Engineering and Physical Sciences (FEPS) , University of Surrey Guildford , Surrey , UK
- d Environmental Flow Research Centre, FEPS , University of Surrey Guildford GU2 7XH , Surrey , UK
| | - M G Carvalho
- e Instituto Superior Técnico , Lisboa , Portugal
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Oliveira CS, Saraiva NZ, de Lima MR, Oliveira LZ, Serapião RV, Borges CAV, Garcia JM, Camargo LSA. Kinetics data from bovine sex-specific embryo development from three different bulls. Data Brief 2016; 7:1211-1216. [PMID: 27761503 PMCID: PMC5063802 DOI: 10.1016/j.dib.2016.03.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [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: 01/04/2016] [Revised: 03/10/2016] [Accepted: 03/18/2016] [Indexed: 11/17/2022] Open
Abstract
Here we present kinetics data from bovine sex-specific embryo development. Embryos were originated using sex-sorted semen from three different Nelore bulls, and semen from the same batch was used for X-and Y-chromosome spermatozoa sorting. Data was obtained for six time points (24, 48, 96, 120, and 144 h.p.i.). Analyses for each bull׳s embryos (1, 2 and 3) is presented for female and male groups separately. Also, grouped data analysis, considering bull and sex interaction, is shown. For further interpretation and discussion, see "Cell death is involved in sexual dimorphism during preimplantation development" (Oliveira et al., 2015 [1]).
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Affiliation(s)
- C S Oliveira
- Embrapa Dairy Cattle, Animal Reproduction Laboratory, Valença, Brazil
| | | | - M R de Lima
- Sao Paulo State University, Jaboticabal, Brazil
| | - L Z Oliveira
- University of São Paulo (USP), Pirassununga, Brazil; Centro Universitário de Rio Preto (UNIRP), São José do Rio Preto, Brazil
| | - R V Serapião
- PESAGRO-Rio, Animal Reproduction Laboratory, Valença, Brazil
| | - C A V Borges
- Embrapa Dairy Cattle, Animal Reproduction Laboratory, Valença, Brazil
| | - J M Garcia
- Sao Paulo State University, Jaboticabal, Brazil
| | - L S A Camargo
- Embrapa Dairy Cattle, Animal Reproduction Laboratory, Valença, Brazil
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Fearon K, Argiles JM, Baracos VE, Bernabei R, Coats A, Crawford J, Deutz NE, Doehner W, Evans WJ, Ferrucci L, Garcia JM, Gralla RJ, Jatoi A, Kalantar-Zadeh K, Lainscak M, Morley JE, Muscaritoli M, Polkey MI, Rosano G, Rossi-Fanelli F, Schols AM, Strasser F, Vellas B, von Haehling S, Anker SD. Request for regulatory guidance for cancer cachexia intervention trials. J Cachexia Sarcopenia Muscle 2015; 6:272-4. [PMID: 26675232 PMCID: PMC4670733 DOI: 10.1002/jcsm.12083] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 09/25/2015] [Indexed: 12/27/2022] Open
Affiliation(s)
- Kch Fearon
- Clinical and Surgical Sciences, School of Clinical Sciences and Community Health, Royal Infirmary, University of Edinburgh Edinburgh, UK
| | - J M Argiles
- Biochemistry and Molecular Biology of Cancer, Faculty of Biology, University of Barcelona Barcelona, Spain
| | - V E Baracos
- Department of Oncology, University of Alberta Edmonton, Alberta, Canada
| | - R Bernabei
- Department of Geriatrics, Neurosciences, and Orthopedics, Catholic University of the Sacred Heart Roma, Italy
| | - Ajs Coats
- Monash University Australia ; University of Warwick UK
| | | | - N E Deutz
- Center for Translational Research in Aging and Longevity, Department of Health and Kinesiology, Texas A&M University College Station, TX, 77843, USA
| | - W Doehner
- Center for Stroke Research CSB, Charité - Universitätsmedizin Berlin Germany
| | - W J Evans
- KineMed, Inc. Emeryville, CA, 94608, USA ; Division of Geriatrics, Duke Medical Center Durham, NC, 27710, USA
| | - L Ferrucci
- Intramural Research Program, National Institute on Aging, NIH Baltimore, MD, 20892, USA
| | - J M Garcia
- Division of Endocrinology, Diabetes and Metabolism, Center for Translational Research on Inflammatory Diseases, Michael E. DeBakey VA Medical Center, and Baylor College of Medicine Houston, TX, 77030, USA
| | - R J Gralla
- Albert Einstein College of Medicine, Jacobi Medical Center Bronx, NY, 10461, USA
| | - A Jatoi
- Department of Oncology, Mayo Clinic Rochester, MN, 55905, USA
| | - K Kalantar-Zadeh
- Division of Nephrology and Hypertension, University of California Irvine Medical Center Orange, CA, 92868, USA
| | - M Lainscak
- Department of Cardiology and Department of Research and Education, General Hospital Celje Celje, Slovenia
| | - J E Morley
- Divisions of Geriatric Medicine and Endocrinology, Saint Louis University School of Medicine St Louis, MO, 63103, USA
| | - M Muscaritoli
- Department of Clinical Medicine, Sapienza University Rome, Italy
| | - M I Polkey
- NIHR Respiratory Biomedical Research Unit at the Royal Brompton and NHS Foundation Trust and Imperial College London, UK
| | - G Rosano
- Department of Medical Sciences, IRCCS San Raffaele Roma. Nutramed Consortium Italy
| | - F Rossi-Fanelli
- Department of Clinical Medicine, Sapienza University Rome, Italy
| | - A M Schols
- NUTRIM School of Nutrition and Translational Research in Metabolism, Department of Respiratory Medicine, Maastricht University Medical Centre Maastricht, The Netherlands
| | - F Strasser
- Oncological Palliative Medicine, Clinic Oncology/Hematology, Department Internal Medicine and Palliative Centre, Cantonal Hospital St.Gallen Switzerland
| | - B Vellas
- Department of Geriatrics, CHU Toulouse Toulouse, France
| | - S von Haehling
- Innovative Clinical Trials, Department of Cardiology & Pneumology, University Medical Center Göttingen (UMG) Göttingen, Germany
| | - S D Anker
- Innovative Clinical Trials, Department of Cardiology & Pneumology, University Medical Center Göttingen (UMG) Göttingen, Germany
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Hernandez-Vaquero D, Diaz R, Garcia JM, Calvo D, Llosa JC. Mid-term impact of patient-prosthesis mismatch on young and middle-aged patients undergoing surgery due to severe aortic stenosis. J Cardiothorac Surg 2013. [PMCID: PMC3844537 DOI: 10.1186/1749-8090-8-s1-o101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Garcia JM, Swerdloff R, Wang C, Kyle M, Kipnes M, Biller BMK, Cook D, Yuen KCJ, Bonert V, Dobs A, Molitch ME, Merriam GR. Macimorelin (AEZS-130)-stimulated growth hormone (GH) test: validation of a novel oral stimulation test for the diagnosis of adult GH deficiency. J Clin Endocrinol Metab 2013; 98:2422-9. [PMID: 23559086 PMCID: PMC4207947 DOI: 10.1210/jc.2013-1157] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
CONTEXT In the absence of panhypopituitarism and low serum IGF-I levels, the diagnosis of adult GH deficiency (AGHD) requires confirmation with a GH stimulation test. Macimorelin is a novel, orally active ghrelin mimetic that stimulates GH secretion. OBJECTIVE The objective of the study was to determine the diagnostic efficacy and safety of macimorelin in AGHD. DESIGN This was a multicenter open-label study comparing the diagnostic accuracy of oral macimorelin with that of arginine+GHRH in AGHD patients and healthy, matched controls. After 43 AGHD patients and 10 controls were tested, the GHRH analog Geref Diagnostic [GHRH(1-29)NH2] became unavailable in the United States. The study was completed by testing 10 additional AGHD patients and 38 controls with macimorelin alone. MAIN OUTCOME MEASURE Peak GH area under the receiver operating characteristic curve after macimorelin was measured. RESULTS Fifty AGHD subjects and 48 controls were evaluated. Peak GH levels in AGHD patients and controls after macimorelin were 2.36 ± 5.69 and 17.71 ± 19.11 ng/mL, respectively (P < .0001). With macimorelin, the receiver operating characteristic analysis yielded an optimal GH cut point of 2.7 ng/mL, with 82% sensitivity, 92% specificity, and 13% misclassification rate. For subjects receiving both tests, macimorelin showed discrimination comparable with arginine+GHRH (area under the receiver operating characteristic curve 0.99 vs 0.94, respectively, P = .29). Obesity (body mass index > 30 kg/m(2)) was present in 58% of subjects, and peak GH levels were inversely associated with body mass index in controls (r = -0.37, P = .01). Using the separate cut points of 6.8 ng/mL for nonobese and 2.7 for obese subjects reduced the misclassification rate to 11%. Only 1 drug-related serious adverse event, an asymptomatic QT interval prolongation on the electrocardiogram, was reported. CONCLUSION Oral macimorelin is safe, convenient, and effective in diagnosing AGHD with accuracy comparable with the arginine+GHRH test.
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Affiliation(s)
- J M Garcia
- Division of Endocrinology, Diabetes, and Metabolism, Michael E. DeBakey Veterans Affairs Medical Center, Baylor College of Medicine, 2002 Holcombe Boulevard, Building 109, Room 210, Houston, Texas 77030, USA.
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Oliveira CS, Saraiva NZ, Cruz MHC, Mazeti B, Oliveira LZ, Lopes FL, Garcia JM. HDAC inhibition decreases XIST expression on female IVP bovine blastocysts. Reproduction 2013; 145:9-17. [PMID: 23104973 DOI: 10.1530/rep-11-0343] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
During initial development, both X chromosomes are active in females, and one of them must be silenced at the appropriate time in order to dosage compensate their gene expression levels to male counterparts. Silencing involves epigenetic mechanisms, including histone deacetylation. Major X chromosome inactivation (XCI) in bovine occurs between hatching and implantation, although in vitro culture conditions might disrupt the silencing process, increasing or decreasing X-linked gene expression. In this study, we aimed to address the roles of histone deacetylase inhibition by trichostatin A (TSA) on female preimplantation development. We tested the hypothesis that by enhancing histone acetylation, TSA would increase the percentage of embryos achieving 16-cell stage, reducing percentage of embryos blocked at 8-cell stage, and interfere with XCI in IVF embryos. We noticed that after TSA treatment, acetylation levels in individual blastomeres of 8-16 cell embryos were increased twofold on treated embryos, and the same was detected for blastocysts. Changes among blastomere levels within the same embryo were diminished on TSA group, as low-acetylated blastomeres were no longer detected. The percentage of embryos that reached the 5th cleavage cycle 118 h after IVF, analyzed by Hoechst staining, remained unaltered after TSA treatment. Then, we assessed XIST and G6PD expression in individual female bovine blastocysts by quantitative real-time PCR. Even though G6PD expression remained unaltered after TSA exposure, XIST expression was eightfold decreased, and we also detected a major decrease in the percentage of blastocysts expressing detectable XIST levels after TSA treatment. Based on these results, we conclude that HDAC is involved on XCI process in bovine embryos, and its inhibition might delay X chromosome silencing and attenuate aberrant XIST expression described for IVF embryos.
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Affiliation(s)
- Clara Slade Oliveira
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Universidade Estadual Paulista, Jaboticabal, Brazil.
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Saraiva NZ, Oliveira CS, Tetzner TAD, de Lima MR, de Melo DS, Niciura SCM, Garcia JM. Chemically assisted enucleation results in higher G6PD expression in early bovine female embryos obtained by somatic cell nuclear transfer. Cell Reprogram 2012; 14:425-35. [PMID: 22908977 DOI: 10.1089/cell.2011.0077] [Citation(s) in RCA: 4] [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] [Indexed: 01/31/2023] Open
Abstract
Despite extensive efforts, low efficiency is still an issue in bovine somatic cell nuclear transfer (SCNT). The hypothesis of our study was that the use of cytoplasts produced by chemically assisted enucleation (EN) would improve nuclear reprogramming in nuclear transfer (NT)-derived embryos because it results in lower damage and higher cytoplasm content than conventional EN. For that purpose, we investigated the expression of two X-linked genes: X inactive-specific transcript (XIST) and glucose 6-phosphate dehydrogenase (G6PD). In the first experiment, gene expression was assessed in day-7 female blastocysts from embryonic cell NT (ECNT) groups [conventional, ECNT conv; chemically assisted, ECNT deme (demecolcine)]. Whereas in the ECNT conv group, only one embryo (25%; n=4) expressed XIST transcripts, most embryos showed XIST expression (75%; n=4) in the ECNT deme group. However, no significant differences in transcript abundance of XIST and G6PD were found when comparing the embryos from all groups. In a second experiment using somatic cells as nuclear donors, we evaluated gene expression profiles in female SCNT-derived embryos. No significant differences in relative abundance (RA) of XIST transcripts were observed among the groups. Nonetheless, higher (p<0.05) levels of G6PD were observed in SCNT deme and in vitro-derived groups in comparison to SCNT conv. To know whether higher G6PD expression in embryos derived from SCNT chemically assisted EN indicates higher metabolism in embryos considered of superior quality or if the presence of higher reactive oxygen species (ROS) levels generated by the increased oxygen consumption triggers G6PD activation, the expression of genes related to stress response should be investigated in embryos produced by that technique.
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Affiliation(s)
- Naiara Zoccal Saraiva
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Universidade Estadual Paulista, Jaboticabal, Brazil.
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Marconato HMF, Panico VJA, Saragiotto L, Machado TL, Lotti IRC, Kabbach BM, Garcia JM, Sousa FLP, Prieto DMM, Sass N, Markert UR. PP124. Trofoblastic invasion: The role of subunits STAT1 and STAT3. Pregnancy Hypertens 2012; 2:306. [PMID: 26105446 DOI: 10.1016/j.preghy.2012.04.235] [Citation(s) in RCA: 2] [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: 10/28/2022]
Abstract
INTRODUCTION The trophoblastic migration/invasion are controlled by cytokines and growth factors that use intracellular pathways of signal to promote the regulation of gene expression, proliferation, cells differentiation, angiogenesis and embryonic development. The most important mediator of cytokine in trophoblastic invasion is the Janus-Kinase/signal transducer and activator of transcription (JAK/STAT). STATs are amino acids, compounds of 700-850 variable long-chain with isoforms α and β and molecular weight between 83-113kDa. The role of these factors in the pregnancy set up may contribute to adopt interventions that could contribute to prophylaxis and/or treatment of abnormalities in the course of gestation when installed early. OBJECTIVES Search on database the role of STAT in the process of trophoblastic invasion with emphasis on subunits STAT1 and STAT3. METHODS This is a review performed on PubMed database. Have been included Studies found from 1992 (the year of discovery of STATs) until July 2011, without language restriction. The descriptors were: "Signal transducers and activators of transcription "and" Trophoblast". In the end we excluded bibliographical review. RESULTS Five of the six selected papers studied the role of STAT3 in the physiology of the trophoblastc invasion process. One of them, indirectly by selection process of lactobacilli of vaginal flora endogenous, during change of vaginal pH on pregnancy, altering the release of greater or lesser number of Interleukin-10 which modulates the activation JAK/STAT. Among them, one of the study refers to involvement of STAT1 in the immunomodulation of interface fetus-mother. CONCLUSION STAT3 is directly involved in the process of trophoblast invasion either in its endometrium adherence to, angiogenesis, invasion and regulation of invasion. And STAT1 is involved in immunomodulation through its suppression by trophoblast STAT utron. Several soluble factors that are generally present in the decidua, especially hepatocyte growth factor, granulocyte macrophagocytic-colony stimulating factors, interleukin-6, interleukin-11 and inhibition leukemia factor , which have been described by using the JAK-STAT activating STAT1 and STAT3 for intracellular signaling and from this process may influence the invasion trophoblast.
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Affiliation(s)
- H M F Marconato
- Obstetrics, UNILUS - Lusíada Foundation, Faculty of Medical Sciences of Santos, Santos, Brazil
| | - V J A Panico
- Obstetrics, UNILUS - Lusíada Foundation, Faculty of Medical Sciences of Santos, Santos, Brazil
| | - L Saragiotto
- Obstetrics, UNILUS - Lusíada Foundation, Faculty of Medical Sciences of Santos, Santos, Brazil
| | - T L Machado
- Obstetrics, UNILUS - Lusíada Foundation, Faculty of Medical Sciences of Santos, Santos, Brazil
| | - I R C Lotti
- Obstetrics, UNILUS - Lusíada Foundation, Faculty of Medical Sciences of Santos, Santos, Brazil
| | - B M Kabbach
- Obstetrics, UNILUS - Lusíada Foundation, Faculty of Medical Sciences of Santos, Santos, Brazil
| | - J M Garcia
- Obstetrics, UNILUS - Lusíada Foundation, Faculty of Medical Sciences of Santos, Santos, Brazil
| | - F L P Sousa
- Obstetrics, UNILUS - Lusíada Foundation, Faculty of Medical Sciences of Santos, Santos, Brazil; Obstetrics, Placenta-Laboratories, University Hospital Jena, Jena, Germany
| | - D M Morales Prieto
- Obstetrics, Placenta-Laboratories, University Hospital Jena, Jena, Germany
| | - N Sass
- Obstetrics, Federal University of São Paulo, São Paulo, Brazil
| | - U R Markert
- Obstetrics, Placenta-Laboratories, University Hospital Jena, Jena, Germany
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Olmos CS, Macedo MA, Pereira RMF, Augusto V, Garcia JM, Panico VJA, Souza EV, Sato JL, Saito M, Sousa FLP, Sass N. PP176. SFLT-1: A possibility of precocious diagnosis of preeclampsia. Pregnancy Hypertens 2012; 2:335-6. [PMID: 26105497 DOI: 10.1016/j.preghy.2012.04.287] [Citation(s) in RCA: 4] [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] [Indexed: 10/28/2022]
Abstract
INTRODUCTION Preeclampsia (PE) affects 5-8% of all pregnant women and can trigger a severe gestational hypertension framework and eventually develop into eclampsia and HELLP syndrome. Anticipating the damage would be important in order to establish procedures that can reduce adverse outcomes. For this reason, many researches are undertaken to identify ways to make a diagnosis of preeclampsia as early as possible. It has been highlighted in literature the study: the sFlt1 (soluble fms-like tyrosine kinase-1) has been implicated in the precocious diagnosis of pre eclampsia. The sFlt1 is an anti-angiogenic factor produced in response to oxidative stress derived from the deleterious effects of pre-eclampsia. OBJECTIVES The objective of the study was to evaluate the role of Soluble fms-like tyrosine kinase-1 in the diagnosis of preeclampsia. METHODS This is a review conducted in the database PubMed and Lilacs. For this purpose, we used the following MeSH, "Vascular Endothelial Growth Factor Receptor-1" OR "FLT1 protein, human" AND "Pre-Eclampsia/diagnosis" in PubMed and "Pre-eclampsia" AND "SFLT1A" in Lilacs, resulting in 84 papers. After reading the abstracts of these studies, we selected the articles analyzed taking into consideration the criteria for inclusion and exclusion. We excluded publications that were not in the period under study (2008 to July 2011) and by study design. Including only case-control, cohort and prospective observational. For a critical analysis of the material, we used the following indicators: researcher, years, central theme, participants, study design and primary outcome. RESULTS The final results of this study were composed of seven articles and are shown for each target outcome. These vary according to gestational age at which PE is installed and the marker studied (sFlt1 alone or its relation to PlGF - sFlt1/PIGF). Six studies showed greater levels of sFlt1 for the preeclampsia groups when compared to the control group. Significantly differences in antiangiogenic factors seric levels were not found among preeclamptic and eclamptic patients. When associated with another factor, like PIGF, a greater efficacy in the diagnosis of early preeclampsia is shown. Of the studies analyzed, only one (Lynch et al) showed no significant difference between the values of sFlt-1 in groups of early PE, late PE and control for gestational ages between 10 and 15 weeks. As for the relation sFlt-1/PIGF, five studies have considered it even better for PE diagnosis when compared to sFlt-1 isolated. CONCLUSION The dosage of sFlt1 may be a relevant resource for the early diagnosis of preeclampsia before the installation of target organ damage, especially if measured in the period between 12 and 28 weeks of gestational age. Whereas sFlt-1 manifests itself before the 20th week, that may be interesting clinical point of view since it is this phase that settles the most severe cases, when the adoption of care could prevent further risks. The relationship sFlt1/PIGF, was more appropriate than the measurement of sFlt1 alone. Additional studies are needed to: amplification of the number of women evaluated, establishing gestational age appropriate for study, serum standard and need to consider the relationship between sFlt1 and other factors pro and/or anti-angiogenic.
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Affiliation(s)
- C S Olmos
- Obstetrics, UNILUS - Lusíada Foundation/Faculty of Medical Sciences of Santos, Brazil
| | - M A Macedo
- Obstetrics, UNILUS - Lusíada Foundation/Faculty of Medical Sciences of Santos, Brazil
| | - R M F Pereira
- Obstetrics, UNILUS - Lusíada Foundation/Faculty of Medical Sciences of Santos, Brazil
| | - V Augusto
- Obstetrics, UNILUS - Lusíada Foundation/Faculty of Medical Sciences of Santos, Brazil
| | - J M Garcia
- Obstetrics, UNILUS - Lusíada Foundation/Faculty of Medical Sciences of Santos, Brazil; Obstetrics, Guilherme Álvaro Hospital, Santos, Brazil
| | - V J A Panico
- Obstetrics, UNILUS - Lusíada Foundation/Faculty of Medical Sciences of Santos, Brazil
| | - E V Souza
- Obstetrics, Federal University of São Paulo, São Paulo, Brazil
| | - J L Sato
- Obstetrics, Federal University of São Paulo, São Paulo, Brazil
| | - M Saito
- Obstetrics, Guilherme Álvaro Hospital, Santos, Brazil
| | - F L P Sousa
- Obstetrics, UNILUS - Lusíada Foundation/Faculty of Medical Sciences of Santos, Brazil; Obstetrics, Guilherme Álvaro Hospital, Santos, Brazil
| | - N Sass
- Obstetrics, Federal University of São Paulo, São Paulo, Brazil
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Silva J, Garcia V, Rodriguez M, Compte M, Cisneros E, Veguillas P, Garcia JM, Dominguez G, Campos-Martin Y, Cuevas J, Peña C, Herrera M, Diaz R, Mohammed N, Bonilla F. Analysis of exosome release and its prognostic value in human colorectal cancer. Genes Chromosomes Cancer 2012; 51:409-18. [PMID: 22420032 DOI: 10.1002/gcc.21926] [Citation(s) in RCA: 212] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A significant proportion of extracellular nucleic acids in plasma circulate highly protected in tumor-specific exosomes, but it is unclear how the release of exosomes is modulated in carcinogenesis. We quantified by cytometry exosomes in plasma of 91 colorectal cancer patients to evaluate their potential as a tumor indicator and their repercussions on diagnosis and prognosis. We examined the involvement of TSAP6, a TP53-regulated gene involved in the regulation of vesicular secretion, in levels of circulating exosomes in plasma of colorectal patients and in HCT116 TP53-(wild-type and null) human colorectal cancer cell lines. The fraction of exosomes in cancer patients was statistically higher than in healthy controls (mean rank ¼ 53.93 vs. 24.35). High levels of exosomes in plasma of patients correlated with high levels of carcino-embryonic antigen (P ¼ 0.029) and with poorly differentiated tumors (P ¼ 0.039) and tended to have shorter overall survival than patients with low levels (P ¼ 0.056). Release of exosomes did not correlate with TSAP6 expression; and regulation of TSAP6 by TP53 was not shown either in tumor samples or in HCT116 cell lines. Although it was not suggested that the TP53/TSAP6 pathway regulates the release of exosomes into the plasma of colorectal cancer patients, the level of circulating exosomes may be used as a tumor indicator, because it correlates with poor prognosis parameters and shorter survival.
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Affiliation(s)
- J Silva
- Departmentof MedicalOncology, University Hospital Puerta de Hierro, Majadahonda, Madrid, Spain
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Trevennec K, Chevalier V, Grosbois V, Garcia JM, Thu HH, Berthouly-Salazar C, Peiris JSM, Roger F. Looking for avian influenza in remote areas. A case study in Northern Vietnam. Acta Trop 2011; 120:160-6. [PMID: 21840292 DOI: 10.1016/j.actatropica.2011.07.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 07/26/2011] [Accepted: 07/30/2011] [Indexed: 11/29/2022]
Abstract
Epidemiological surveys of avian influenza infections rarely focus on backyard poultry systems in remote locations because areas with low levels of poultry production are considered to have little influence on the emergence, re-emergence, persistence or spread of avian influenza viruses. In addition, routine disease investigations in remote areas often are neglected due to the lower availability and relatively high cost of veterinary services there. A bank of avian sera collected in 2005 from ethnic minority households in Ha Giang province (Northern Vietnam), located on the Chinese border, was analysed to estimate the seroprevalence of avian influenza virus (AIV) during a H5N1 epidemic and to identify potential risk factors for infection. The results suggest that the chicken population had been exposed to AIV with a seroprevalence rate of 7.2% [1.45; 10.5]. The H5 and H9 subtypes were identified with a seroprevalence of 3.25% [2.39; 4.11] and 1.12% [0.61; 1.63], respectively. The number of inhabitants in a village and the distance to the main national road were the most influential risk factors of AIV infection, and high-risk clusters were located along the road leading to China. These two results suggest a virus spread through commercial poultry exchanges and a possible introduction of AIV from southern China. Remote areas and small-scale farms may play an under-estimated role in the spread and persistence of AIV.
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Affiliation(s)
- K Trevennec
- French Agricultural Research Center for International Development (CIRAD), Animal and Integrated Risk Management Research Unit, Baillarguet Campus, Montpellier Cedex 5, France.
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Lai JCC, Chan WWL, Nicholls JM, Peiris JSM, Garcia JM. Formation of virus-like particles from human cell lines exclusively expressing Influenza Neuraminidase. BMC Proc 2011. [DOI: 10.1186/1753-6561-5-s1-p66] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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26
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Oliveira CS, de Souza MM, Saraiva NZ, Tetzner TAD, Lima MR, Lopes FL, Garcia JM. In vitro culture of bovine embryos in murine ES cell conditioned media negatively affects expression of pluripotency-related markers OCT4, SOX2 and SSEA1. Reprod Domest Anim 2011; 47:428-35. [PMID: 21933286 DOI: 10.1111/j.1439-0531.2011.01896.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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
Despite extensive efforts, establishment of bovine embryonic stem (ES) cell lines has not been successful. We hypothesized that culture conditions for in vitro-produced (IVP) embryos, the most used source of inner cell mass (ICM) to obtain ES cells, might affect their undifferentiated state. Therefore, the aim of this work was to improve pluripotency of IVP blastocysts to produce suitable ICM for further culturing. We tested KSR and foetal calf serum (FCS) supplements in SOF medium and ES cell conditioned medium (CM) on IVC (groups: KSR, KSR CM, FCS and FCS CM). Cleavage and blastocyst rates were similar between all groups. Also, embryonic quality, assessed by apoptosis rates (TUNEL assay), total cell number and ICM percentage did not differ between experimental groups. However, expression of pluripotency-related markers was affected. We detected down-regulation of OCT3/4, SOX2 and SSEA1 in ICM of FCS CM blastocysts (p < 0.05). SOX2 gene expression revealed lower levels (p < 0.05) on KSR CM blastocysts and a remarkable variation in SOX2 mRNA levels on FCS-supplemented blastocysts. In conclusion, pluripotency-related markers tend to decrease after supplementation with ES cell CM, suggesting different mechanisms regulating mouse and bovine pluripotency. KSR supplementation did not differ from FCS, but FCS replacement by KSR may produce blastocysts with stable SOX2 gene expression levels.
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Affiliation(s)
- C S Oliveira
- Faculdade de Ciências Agrárias e Veterinárias, Sao Paulo State University, UNESP, Jaboticabal, Brazil.
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Martins DS, Ambrósio CE, Saraiva NZ, Wenceslau CV, Morini AC, Kerkis I, Garcia JM, Miglino MA. Early development and putative primordial germ cells characterization in dogs. Reprod Domest Anim 2011; 46:e62-6. [PMID: 20477984 DOI: 10.1111/j.1439-0531.2010.01631.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Previously, three distinct populations of putative primordial germ cells (PGCs), namely gonocytes, intermediate cells and pre-spermatogonia, have been described in the human foetal testis. According to our knowledge, these PGCs have not been studied in any other species. The aim of our study was to identify similar PGC populations in canine embryos. First, we develop a protocol for canine embryo isolation. Following our protocol, 15 canine embryos at 21-25 days of pregnancy were isolated by ovaryhysterectomy surgery. Our data indicate that dramatic changes occur in canine embryo development and PGCs specification between 21 to 25 days of gestation. At that moment, only two PGC populations with distinct morphology can be identified by histological analyses. Cell population 1 presented round nuclei with prominent nucleolus and a high nuclear to cytoplasm ratio, showing gonocyte morphology. Cell population 2 was often localized at the periphery of the testicular cords and presented typical features of PGC. Both germ cell populations were positively immunostained with anti-human OCT-4 antibody. However, at day 25, all cells of population 1 reacted positively with OCT-4, whereas in population 2, fewer cells were positive for this marker. These two PGCs populations present morphological features similar to gonocytes and intermediate cells from human foetal testis. It is expected that a population of pre-spermatogonia would be observed at later stages of canine foetus development. We also showed that anti-human OCT-4 antibody can be useful to identify canine PGC in vivo.
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Affiliation(s)
- D S Martins
- Faculty of Animal Science and Food Engineering, University of Sao Paulo, Pirassununga, São Paulo, Brazil.
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Mohammed N, Rodriguez M, Garcia V, Garcia JM, Dominguez G, Peña C, Herrera M, Gomez I, Diaz R, Soldevilla B, Herrera A, Silva J, Bonilla F. EPAS1 mRNA in plasma from colorectal cancer patients is associated with poor outcome in advanced stages. Oncol Lett 2011; 2:719-724. [PMID: 22848255 DOI: 10.3892/ol.2011.294] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Accepted: 04/08/2011] [Indexed: 12/18/2022] Open
Abstract
The presence of free nucleic acids in plasma has been detected in cancer patients and is associated with poor prognosis. In the present study, the mRNA levels of three genes (EPAS1, KIAA0101 and UBE2D3) in plasma from colorectal cancer patients were analyzed. These genes were selected from a previous study of genomic profiles, discriminating between healthy controls and colorectal cancer patients. mRNA levels were analyzed by real-time PCR in the plasma of 154 patients with colorectal cancer. The association of plasma mRNA levels with clinicopathological parameters and patient survival were analyzed. High levels of EPAS1 in the plasma were associated with patients aged over 50 years, relapse of disease and patient mortality. When patients were divided into two groups, early (I and II) and advanced (III and IV) stages, an association was observed between high levels of EPAS1 mRNA and worse disease-free and overall survival in advanced stages. The expression of KIAA0101 and UBE2D3 was not associated with poor prognosis. Thus, our results suggest that EPAS1 mRNA levels may be an indicator of poor prognosis in colorectal cancer patients at advanced stages, obtained by a non-invasive method.
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Affiliation(s)
- N Mohammed
- Department of Medical Oncology, University Hospital Puerta de Hierro Majadahonda, E-28222 Madrid, Spain
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Mingoti GZ, Castro VSDC, Méo SC, Sá Barretto LS, Garcia JM. The effects of macromolecular and serum supplements and oxygen tension during bovine in vitro procedures on kinetics of oocyte maturation and embryo development. In Vitro Cell Dev Biol Anim 2011; 47:361-7. [PMID: 21424239 DOI: 10.1007/s11626-011-9400-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Accepted: 02/22/2011] [Indexed: 11/29/2022]
Abstract
Aiming to standardize in vitro production of bovine embryos and to obtain supplements to replace serum in culture media, this study evaluated the nuclear maturation kinetics and embryonic development in bovine after in vitro maturation (IVM) and culture (IVC) with several macromolecules (animal origin: bovine serum albumin (BSA), fetal calf serum (FCS); synthetic: polyvinyl alcohol (PVA), polyvinyl pyrrolidone (PVP), Ficoll, and Knockout) at two oxygen tensions (20% and 5% O(2)). Regarding nuclear kinetics, neither the presence of the expected stage (metaphase I, transition anaphase to telophase, and metaphase II) at each evaluation moment (6, 18, and 24 h after IVM, respectively) nor the accelerated polar body emission (at 18 h after IVM) related developmental competence to blastocyst stage when different supplements were compared. Independently of supplement, cleavage rates at 20% O(2) (61.6-79.2%) were higher than at 5% O(2) (38.9-58.7%). At 20% O(2), higher blastocyst and hatching rates, respectively, were obtained in treatments BSA, FCS, Knockout, and control group (IVM with FCS and IVC with BSA + FCS, 14.0-23.5% and 6.8-15.4%) in comparison to PVA, PVP, and Ficoll (0%). The same was observed at 5% O(2) for blastocyst rates with BSA, FCS, Knockout, and control (5.4-16.8%) and for hatching rates with BSA, FCS, and control (2.0-11.1%). We can conclude that producing bovine embryos at 20% O(2) during the entire IVP process resulted in higher developmental rates than at 5% O(2). In addition, while defined macromolecules PVA, PVP, and Ficoll were not suitable for embryonic development, the synthetic serum Knockout was able to replace serum and albumin for IVP in bovine at 20% O(2).
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Affiliation(s)
- Gisele Zoccal Mingoti
- School of Veterinary Medicine, Department of Animal Health, UNESP, Rua Clóvis Pestana, 793, 16050-680, Araçatuba, São Paulo, Brazil.
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Lai JCC, Chan WWL, Nicholls JM, Peiris JSM, Garcia JM. Formation of virus-like particles from human cell lines exclusively expressing Influenza Neuraminidase. BMC Proc 2011; 5. [PMCID: PMC3019494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- JCC Lai
- HKU-Pasteur Research Centre, Hong Kong, Hong Kong SAR
| | - WWL Chan
- HKU-Pasteur Research Centre, Hong Kong, Hong Kong SAR
| | - JM Nicholls
- Department of Pathology, The University of Hong Kong, Hong Kong SAR
| | - JSM Peiris
- HKU-Pasteur Research Centre, Hong Kong, Hong Kong SAR,Department of Microbiology, The University of Hong Kong, Hong Kong SAR
| | - JM Garcia
- HKU-Pasteur Research Centre, Hong Kong, Hong Kong SAR
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Chiaratti MR, Ferreira CR, Meirelles FV, Méo SC, Perecin F, Smith LC, Ferraz ML, de Sá Filho MF, Gimenes LU, Baruselli PS, Gasparrini B, Garcia JM. Xenooplasmic transfer between buffalo and bovine enables development of homoplasmic offspring. Cell Reprogram 2010; 12:231-6. [PMID: 20698765 DOI: 10.1089/cell.2009.0076] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
Nuclear-mitochondrial incompatibilities may be responsible for the development failure reported in embryos and fetuses produced by interspecies somatic cell nuclear transfer (iSCNT). Herein we performed xenooplasmic transfer (XOT) by introducing 10 to 15% of buffalo ooplasm into bovine zygotes to assess its effect on the persistence of buffalo mitochondrial DNA (mtDNA). Blastocyst rates were not compromised by XOT in comparison to both in vitro fertilized embryos and embryos produced by transfer of bovine ooplasm into bovine zygotes. Moreover, offspring were born after transfer of XOT embryos to recipient cows. Buffalo mtDNA introduced in zygotes was still present at the blastocyst stage (8.3 vs. 9.3%, p = 0.11), indicating unaltered heteroplasmy during early development. Nonetheless, no vestige of buffalo mtDNA was found in offspring, indicating a drift to homoplasmy during later stages of development. In conclusion, we show that the buffalo mtDNA introduced by XOT into a bovine zygote do not compromise embryo development. On the other hand, buffalo mtDNA was not inherited by offspring indicating a possible failure in the process of interspecies mtDNA replication.
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Monteiro FM, Oliveira CS, Oliveira LZ, Saraiva NZ, Mercadante MEZ, Lopes FL, Arnold DR, Garcia JM. Chromatin modifying agents in the in vitro production of bovine embryos. Vet Med Int 2010; 2011. [PMID: 20936105 PMCID: PMC2948908 DOI: 10.4061/2011/694817] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2010] [Revised: 07/28/2010] [Accepted: 09/10/2010] [Indexed: 11/20/2022] Open
Abstract
The low efficiency observed in cloning by nuclear transfer is related to an aberrant gene expression following errors in epigenetic reprogramming. Recent studies have focused on further understanding of the modifications that take place in the chromatin of embryos during the preimplantation period, through the use of chromatin modifying agents. The goal of these studies is to identify the factors involved in nuclear reprogramming and to adjust in vitro manipulations in order to better mimic in vivo conditions. Therefore, proper knowledge of epigenetic reprogramming is necessary to prevent possible epigenetic errors and to improve efficiency and the use of in vitro fertilization and cloning technologies in cattle and other species.
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Ferreira CR, Burgstaller JP, Perecin F, Garcia JM, Chiaratti MR, Méo SC, Müller M, Smith LC, Meirelles FV, Steinborn R. Pronounced Segregation of Donor Mitochondria Introduced by Bovine Ooplasmic Transfer to the Female Germ-Line1. Biol Reprod 2010; 82:563-71. [DOI: 10.1095/biolreprod.109.080564] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Saraiva NZ, Perecin F, Méo SC, Ferreira CR, Tetzner TAD, Garcia JM. Demecolcine effects on microtubule kinetics and on chemically assisted enucleation of bovine oocytes. Cloning Stem Cells 2009; 11:141-52. [PMID: 19226217 DOI: 10.1089/clo.2008.0044] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study aimed to evaluate the effect of demecolcine, a microtubule-depolymerizing agent, on microtubule kinetics; to determine the best concentration of demecolcine as a chemically assisted enucleation agent in metaphase I (MI) and metaphase II (MII) bovine oocytes, and to evaluate the embryonic development after nuclear transfer (NT) using chemically assisted enucleation of recipient oocytes. Oocytes in vitro matured for 12 h (MI) and 21 h (MII) were exposed to several concentrations of demecolcine and evaluated for enucleation or membrane protrusion formation. Demecolcine concentration of 0.05 microg/mL produced the highest rates of enucleation in group MI (15.2%) and protrusion formation in group MII (55.1%), and was employed in the following experiments. Demecolcine effect was seen as early as 0.5 h after treatment, with a significant increase in the frequency of oocytes with complete microtubule depletion in MI (58.9%) and MII (21.8%) compared to initial averages at 0 h (27.4% and 1.9%, respectively). Microtubule repolymerization was observed when MII-treated oocytes were cultured in demecolcine-free medium for 6 h (42.4% oocytes with two evident sets of microtubules). Chemically assisted enucleated oocytes were used as recipient cytoplasts in NT procedures to assess embryonic development. For NT, 219 of 515 oocytes (42.5%) formed protrusions and were enucleated, and reconstructed, resulting in 58 nuclear-transferred one-cell embryos. Cleavage (84.5%) and blastocyst development (27.6%) rates were assessed. In conclusion, demecolcine can be used at lower concentrations than routinely employed, and the chemically assisted enucleation technique was proven to be highly efficient allowing embryonic development in bovine.
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Affiliation(s)
- Naiara Zoccal Saraiva
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, FCAV-UNESP, Jaboticabal-SP, Brazil.
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35
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Méo SC, Ferreira CR, Perecin F, Saraiva NZ, Tetzner TAD, Yamazaki W, Leal CLV, Meirelles FV, Garcia JM. Karyoplast exchange between strontium- and 6-DMAP-parthenogenetically activated zygotes of cattle. Anim Reprod Sci 2009; 116:381-5. [PMID: 19327922 DOI: 10.1016/j.anireprosci.2009.02.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2008] [Revised: 02/19/2009] [Accepted: 02/27/2009] [Indexed: 11/28/2022]
Abstract
Ooplasmic factors drive nuclear organization after fertilization and are also important for re-programming in nuclear transfer procedures, in which artificial activation is essential for reconstructed embryos to progress in development. The present research evaluated the effect of pronuclear transfer (PT) between zygotes parthenogenetically activated with ionomycin followed by strontium (S) or 6-DMAP (D) on early embryonic development. PT was performed in the same zygote to obtain embryos in control groups (S-PT and D-PT) and between zygotes activated with S and D to achieve embryos with differentially activated cytoplasm (C) and nucleus (N) (SCDN and DCSN). PT procedure did not affect cleavage and blastocyst rates, respectively, in PT control groups compared to non-manipulated control (S-PT: 73.6% and 7.3% compared with S-Control: 77.9% and 7.8%; and D-PT: 73.3% and 31.7% compared with D-Control: 83.1% and 41.5%). Cleavage, eight-cell, and blastocyst rates, respectively, were similar between SCDN (76.5%, 36.4%, and 6.8%) and DCSN (69.5%, 25.0%, and 4.9%) embryos. Developmental rates in SCDN were similar to S-PT, but inferior to D-PT. Developmental arrest up to eight-cell stage was greater in SCDN and DCSN than in S-PT and D-PT. In conclusion, karyoplast exchange between parthenogenetic zygotes activated with strontium and 6-DMAP can lead to nuclear-cytoplasmic incompatibilities and affect embryonic development to the eight-cell and blastocyst stages.
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Affiliation(s)
- Simone Cristina Méo
- Embrapa Pecuária Sudeste, Rodovia Washington Luiz, km 234, 13560-970, São Carlos, SP, Brazil.
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Perecin F, Méo SC, Yamazaki W, Ferreira CR, Merighe GKF, Meirelles FV, Garcia JM. Imprinted gene expression in in vivo- and in vitro-produced bovine embryos and chorio-allantoic membranes. Genet Mol Res 2009; 8:76-85. [PMID: 19283675 DOI: 10.4238/vol8-1gmr541] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Cloning by nuclear transfer is often associated with poor results due to abnormal nuclear reprogramming of somatic donor cells and altered gene expression patterns. We investigated the expression patterns of imprinted genes IGF2 and IGF2R in 33- to 36-day bovine embryos and chorio-allantoic membranes derived from in vivo- and in vitro-produced embryos by somatic cell nuclear transfer (SCNT), parthenogenetic activation, and in vitro fertilization (IVF). There was a lower IGF2 expression rate in the SCNT (0.19) and parthenogenetic (0.02) groups when compared to in vivo and IVF embryos (2.01; P < 0.05). In the chorio-allantoic membranes, IGF2 showed a baseline expression pattern (P < 0.05) in parthenotes (0.001) when compared to in vivo, IVF (3.13), and SCNT (0.98) groups. IGF2R was less expressed (P < 0.05) in SCNT chorio-allantoic membranes (0.25) when compared to the in vivo group. The low expression of IGF2 in parthenogenetic embryos and chorio-allantoic membranes confirms its imprinted status in cattle. Alterations in the relative frequency of IGF2 and IGF2R transcripts were observed in SCNT-derived bovine embryos and chorio-allantoic membranes, respectively, supporting the hypothesis that abnormalities in the expression of imprinted genes are causes of the low efficiency of SCNT procedures in this species.
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Affiliation(s)
- F Perecin
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP, Brazil.
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37
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Sá Filho MF, Carvalho NAT, Gimenes LU, Torres-Júnior JR, Nasser LFT, Tonhati H, Garcia JM, Gasparrini B, Zicarelli L, Baruselli PS. Effect of recombinant bovine somatotropin (bST) on follicular population and on in vitro buffalo embryo production. Anim Reprod Sci 2008; 113:51-9. [PMID: 18691835 DOI: 10.1016/j.anireprosci.2008.06.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Revised: 05/18/2008] [Accepted: 06/30/2008] [Indexed: 11/25/2022]
Abstract
The objective of this study was to evaluate the effect of bovine somatotropin (bST) on ovarian follicular population in buffalo heifers and its influence on oocyte quality, recovery rates and in vitro embryo production. We tested the hypothesis that bST treatment in buffalo females submitted to an ovum pick-up (OPU) program would improve the number of follicles recruited, oocyte quality and in vitro embryo production. A total of 10 heifers were assigned into two treatment groups: group bST (n=5; receiving 500 mg of bST in regular intervals) and control group (n=5; without additional treatment). Both groups were subjected to OPU sessions twice a week (every 3 or 4 days), for a total of 10 sessions per female, although due to procedural problems, only the first five OPU sessions produced embryos. The number of follicles and the diameters were recorded at all OPU sessions. The harvested oocytes were counted and classified according to their quality as either A, B, C, D or E, with A and B considered good quality. Cleavage and blastocyst production rates were evaluated 2 and 7 days after in vitro fertilization, respectively. The bST treatment increased the total number of antral follicles (>3mm in diameter; 12.2 compared with 8.7; p<0.05) and of small antral follicles (<5mm; 9.1 compared with 6.5; p<0.05) per OPU session. The bST also tended to increase the number of oocytes recovered per session (5.2 compared with 4.1; p=0.07), and enhanced the percentage of good quality oocytes (48.8% compared with 40.6%; p=0.07). bST showed no effect on cleavage and blastocyst production rates (p>0.05). The significant effects of performing repeated OPU sessions were decreasing the follicular population (p<0.001) as well as the number of follicles aspirated (p<0.001), and oocytes recovered (p<0.02). In conclusion, bST treatment improves the follicular population, demonstrating its possible application in buffalo donors submitted to OPU programs.
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Affiliation(s)
- M F Sá Filho
- Departamento de Repodução Animal, FMVZ-USP, São Paulo, SP, Brazil
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Ferreira CR, Meirelles FV, Yamazaki W, Chiaratti MR, Méo SC, Perecin F, Smith LC, Garcia JM. The kinetics of donor cell mtDNA in embryonic and somatic donor cell-derived bovine embryos. Cloning Stem Cells 2008; 9:618-29. [PMID: 18154521 DOI: 10.1089/clo.2006.0082] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The mechanisms controlling the outcome of donor cell-derived mitochondrial DNA (mtDNA) in cloned animals remain largely unknown. This research was designed to investigate the kinetics of somatic and embryonic mtDNA in reconstructed bovine embryos during preimplantation development, as well as in cloned animals. The experiment involved two different procedures of embryo reconstruction and their evaluation at five distinct phases of embryo development to measure the proportion of donor cell mtDNA (Bos indicus), as well as the segregation of this mtDNA during cleavage. The ratio of donor cell (B. indicus) to host oocyte (B. taurus) mtDNA (heteroplasmy) from blastomere(NT-B) and fibroblast(NT-F) reconstructed embryos was estimated using an allele-specific PCR with fluorochrome-stained specific primers in each sampled blastomere, in whole blastocysts, and in the tissues of a fibroblast-derived newborn clone. NT-B zygotes and blastocysts show similar levels of heteroplasmy (11.0% and 14.0%, respectively), despite a significant decrease at the 9-16 cell stage (5.8%; p<0.05). Heteroplasmy levels in NT-F reconstructed zygotes, however, increased from an initial low level (4.7%), to 12.9% (p<0.05) at the 9-16 cell stage. The NT-F blastocysts contained low levels of heteroplasmy (2.2%) and no somatic-derived mtDNA was detected in the gametes or the tissues of the newborn calf cloned. These results suggest that, in contrast to the mtDNA of blastomeres, that of somatic cells either undergoes replication or escapes degradation during cleavage, although it is degraded later after the blastocyst stage or lost during somatic development, as revealed by the lack of donor cell mtDNA at birth.
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Miglino MA, Pereira FTV, Visintin JA, Garcia JM, Meirelles FV, Rumpf R, Ambrósio CE, Papa PC, Santos TC, Carvalho AF, Leiser R, Carter AM. Placentation in cloned cattle: Structure and microvascular architecture. Theriogenology 2007; 68:604-17. [PMID: 17568663 DOI: 10.1016/j.theriogenology.2007.04.060] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2007] [Accepted: 04/10/2007] [Indexed: 10/23/2022]
Abstract
To elucidate the morphological differences between placentas from normal and cloned cattle pregnancies reaching term, the umbilical cord, placentomes and interplacentomal region of the fetal membranes were examined macroscopically as well as by light and scanning electron microscopy. In pregnancies established by somatic nucleus transfer (NT), the umbilical cord and fetal membranes were edematous. Placentomal fusion was common, resulting in increased size and a decreased number of placentomes. Extensive areas of the chorioallantoic membrane were devoid of placentomes. An increased number of functional or accessory microcotyledons (<1 cm) were present at the maternally oriented surface of fetal membranes. Extensive areas of extravasated maternal blood were present within the placentomes and in the interplacentomal region. The crypts on the caruncular surface were dilated and accommodated complexes of more than one primary villus, as opposed to a single villus in non-cloned placentae. Scanning electron microscopy of blood vessel casts revealed that there was also more than one stem artery per villous tree and that the ramification of the vessels failed to form dense complexes of capillary loops and sinusoidal dilations as in normal pregnancies. At the materno-fetal interface, however, the trophoblast and uterine epithelium had normal histology. In conclusion, the NT placentas had a range of pathomorphological changes; this was likely associated with the poor clinical outcome of NT pregnancies.
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Affiliation(s)
- M A Miglino
- Universidade de São Paulo, Faculdade de Medicina Veterinária e Zootecnia, São Paulo, SP, Brazil.
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Barretto LSS, Caiado Castro VSD, Garcia JM, Mingoti GZ. Role of roscovitine and IBMX on kinetics of nuclear and cytoplasmic maturation of bovine oocytes in vitro. Anim Reprod Sci 2007; 99:202-7. [PMID: 16860950 DOI: 10.1016/j.anireprosci.2006.06.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2005] [Accepted: 06/09/2006] [Indexed: 10/24/2022]
Abstract
The 3-isobutyl-1-methylxanthine (IBMX) is able to prevent resumption of meiosis by maintaining elevated cyclic AMP (cAMP) concentrations in the oocyte, and roscovitine, a purine known to specifically inhibit MPF kinase activity, maintains bovine oocytes at the germinal vesicle (GV) stage. The present study was conducted to analyze whether cytoplasmic maturation (examined by the pattern of cortical granule (CG) distribution) of bovine oocytes is improved during meiotic arrest with IBMX and roscovitine. Oocytes were matured in vitro in a 10% Knockout(SR) supplemented TCM-199 medium (Control) with either 0.5 mM IBMX or 25 microM roscovitine (ROSC). Oocytes were stained with fluorescein isothiocyanate conjugated Lens culinaris agglutinin (FITC-LCA) for CG evaluation and with Hoechst 33342 for nuclear stage assessment. At 16 h of culture, the percentage of oocytes remaining in the GV stage was higher (P < 0.05) in the ROSC group (32.41%) compared with the Control and IBMX groups (8.61% and 9.73%, respectively). At 24 h of culture, progression of meiosis to M II stage was retarded (P < 0.05) in the ROSC group (24.05%) compared to the Control (60.20%), whereas the IBMX group (33.88%) showed no significant difference to the other two groups. At 16 h of maturation, the proportion of oocytes with CG in clusters (immature cytoplasm) was similar between the groups, as was the percentage of peripheral CG (mature) at 24 h of maturation. The results of the present study demonstrated that the meiotic inhibitors IBMX and roscovitine delay the progression of nuclear maturation without affecting cytoplasmic maturation, assessed by the analysis of CG repositioning.
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Affiliation(s)
- L S S Barretto
- School of Agricultural and Veterinary Sciences, UNESP, 14884-900 Jaboticabal, SP, Brazil
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Landim LP, Miglino MA, Pfarrer C, Ambrosio CE, Garcia JM. Culture of mature trophoblastic giant cells from bovine placentomes. Anim Reprod Sci 2007; 98:357-64. [PMID: 16716544 DOI: 10.1016/j.anireprosci.2006.04.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2005] [Revised: 03/24/2006] [Accepted: 04/18/2006] [Indexed: 11/21/2022]
Abstract
The mostly binucleate trophoblast giant cells (TGC) found in bovine placentomes, in addition to synthesizing and releasing hormones play an important role in fetal development and maternal adaptation to pregnancy. Placentomes from early gestation were collected, and for isolation of mature TGC, three cellular disaggregation methods, mechanical (MECH), enzymatic by trypsin (TRYP) or collagenase (COLL) were compared to each other. Further on, the cell survival in culture medium (DMEM) supplemented with either 10% fetal calf serum (FCS) or 10% serum replacement (SR) on culture plates free of any substrate was evaluated over a period of 90 days by trypan blue exclusion. The cells were further characterized by HOECHST 33342 nuclear staining, and immunocytochemical staining with monoclonal antibodies against vimentin and cytokeratin. A mean total rate of TGC survival of 82.56% was recorded. Statistical analysis showed significantly higher survival rates after enzymatic disaggregation with COLL (86.23%) than following MECH (80.38%) or TRYP (80.91%) treatment. Supplementation of DMEM with FCS resulted in significantly higher cellular survival rates (87.13%) when compared to the addition of SR (77.73%). Analysis of the influence of both, disaggregation method and medium supplementation on TGC survival revealed statistically significant differences between the following groups: MECH-SR (71.09%) was significantly lower than all other groups; TRYP-SR (78.03%) was significantly different from all other groups; TRYP-FCS (83.43%) and COLL-SR (84.08%) were significantly lower than MECH-FCS (89.98%) which together with COLL-FCS (88.25%) showed the highest cellular survival rate. In summary, our results show that TGC isolated from early gestation placentomes may be viable for more than 90 days of culture. However, whether these TGC produce placental lactogen throughout this period has yet to be determined.
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Affiliation(s)
- L P Landim
- Preventive Veterinary Medicine and Animal Reproduction Department, Agricultural and Veterinary Science College, UNESP, Jaboticabal, P.O. Box 14870-000, SP, Brazil
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Yamazaki W, Ferreira CR, Méo SC, Leal CLV, Meirelles FV, Garcia JM. Use of strontium in the activation of bovine oocytes reconstructed by somatic cell nuclear transfer. ZYGOTE 2006; 13:295-302. [PMID: 16388697 DOI: 10.1017/s0967199405003333] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2005] [Accepted: 04/29/2005] [Indexed: 11/07/2022]
Abstract
As an important step in the nuclear transfer (NT) procedure, we evaluated the effect of three different treatments for oocyte activation on the in vitro and in vivo developmental capacity of bovine reconstructed embryos: (1) strontium, which has been successfully used in mice but not yet tested in cattle; (2) ionomycin and 6-dimethylaminopurine (6-DMAP), a standard treatment used in cattle; (3) ionomycin and strontium, in place of 6-DMAP. As regards NT blastocyst development, no difference was observed when strontium (20.1%) or ionomycin/6-DMAP (14.4%) were used. However, when 6-DMAP was substituted by strontium (3), the blastocyst rate (34.8%) was superior to that in the other activation groups (p <0.05). Results of in vivo development showed the possibility of pregnancies when NT embryos activated in strontium were transferred to recipient cows (16.6%). A live female calf was obtained when ionomycin/strontium were used, but it died 30 days after birth. Our findings show that strontium can be used as an activation agent in bovine cloning procedures and that activation with a combination of strontium and ionomycin increased the in vitro developmental capacity of reconstructed embryos. This is the first report of a calf produced by adult somatic cell NT in Latin America.
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Affiliation(s)
- Walt Yamazaki
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, FCAV - UNESP, Via, de Acesso Prof. Paulo Donato Castelane, s/n, 14884-900, Jaboticabal, SP, Brazil.
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Abstract
Strontium efficiently activates mouse oocytes, however, there is limited information on its use in cattle. Thus, the objective of this study was to establish a suitable protocol for activating bovine oocyte with strontium. For pronuclear development, the absence of calcium and magnesium in the activation medium (TALP) with 10 and 50 mM strontium (34.4 and 53.1%, respectively) was superior to the complete TALP (6.5 and 19.4%, respectively). In all activation media, better results were observed with 25 and 50 mM strontium (21.9-53.1 and 19.4-53.1%, respectively). Incubation for 4 h promoted similar results in all strontium concentrations. However, strontium at 15, 20, and 25 mM for 6 and 8 h (40.7, 46.7, and 48.3%, and 29.3, 48.3, and 40.7%, respectively) were superior to control (15.5 and 10%, respectively). After in vitro maturation for 26 h, strontium (S; 20 mM in Ca2+- and Mg2+-free TALP for 6 h), ionomycin+strontium (IS), and strontium+ionomycin (SI) (60, 63.3, and 65%, respectively) were similar in pronuclear development and superior to ionomycin (I; 5 microM for 5 min; 36.7%). In treatments S and I, only 1 PN zygotes were observed. In treatment S, most of them had 1 and 2 PB (35.7 and 60.7%, respectively), and in treatment I, 0, 1, and 2 PB (14.3, 57.1, and 28.6%, respectively). Most of the zygotes in treatment IS and SI were 1 PN 2 PB (77.4 and 61.6%, respectively). The number of oocytes with clusters of cortical granules was similar in all treated groups (11-29%). Cortical granule exocytosis in treatment IS (68%) was similar to S (54%) and superior to I, SI, and control (27, 45, and 5.0%, respectively). Cleavage and blastocyst rates were similar for S, I, IS, and SI treatments (61.7-76.7, and 8.3-13.3%, respectively) and the same was observed for ICM, TE, and total cell number, and ICM/total cell ratio (22-25, 64-69, and 86-95, and 0.26-0.27). In conclusion, strontium may be efficiently applied for bovine oocyte activation at 20 mM in Ca2+- and Mg2+-free TALP medium for 6 h.
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Affiliation(s)
- Simone Cristina Méo
- Faculdade de Ciências Agrárias e Veterinárias, UNESP, Câmpus de Jaboticabal, Via de Acesso Paulo Donato Castellane, s/n 14884-900 Jaboticabal, SP, Brazil.
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Shimamura M, Garcia JM, Prough DS, Dewitt DS, Uchida T, Shah SA, Avila MAA, Hellmich HL. Analysis of long-term gene expression in neurons of the hippocampal subfields following traumatic brain injury in rats. Neuroscience 2005; 131:87-97. [PMID: 15680694 DOI: 10.1016/j.neuroscience.2004.10.041] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2004] [Indexed: 01/19/2023]
Abstract
After experimental traumatic brain injury (TBI), widespread neuronal loss is progressive and continues in selectively vulnerable brain regions, such as the hippocampus, for months to years after the initial insult. To clarify the molecular mechanisms underlying secondary or delayed cell death in hippocampal neurons after TBI, we compared long-term changes in gene expression in the CA1, CA3 and dentate gyrus (DG) subfields of the rat hippocampus at 24 h and 3, 6, and 12 months after TBI with changes in gene expression in sham-operated rats. We used laser capture microdissection to collect several hundred hippocampal neurons from the CA1, CA3, and DG subfields and linearly amplified the nanogram samples of neuronal RNA with T7 RNA polymerase. Subsequent quantitative analysis of gene expression using ribonuclease protection assay revealed that mRNA expression of the anti-apoptotic gene, Bcl-2, and the chaperone heat shock protein 70 was significantly downregulated at 3, 6 (Bcl-2 only), and 12 months after TBI. Interestingly, the expression of the pro-apoptotic genes caspase-3 and caspase-9 was also significantly decreased at 3, 6 (caspase-9 only), and 12 months after TBI, suggesting that long-term neuronal loss after TBI is not mediated by increased expression of pro-apoptotic genes. The expression of two aging-related genes, p21 and integrin beta3 (ITbeta3), transiently increased 24 h after TBI, returned to baseline levels at 3 months and significantly decreased below sham levels at 12 months (ITbeta3 only). Expression of the gene for the antioxidant glutathione peroxidase-1 also significantly increased 6 months after TBI. These results suggest that decreased levels of neuroprotective genes may contribute to long-term neurodegeneration in animals and human patients after TBI. Conversely, long-term increases in antioxidant gene expression after TBI may be an endogenous neuroprotective response that compensates for the decrease in expression of other neuroprotective genes.
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Affiliation(s)
- M Shimamura
- Department of Anesthesiology, University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555-0830, USA
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Nemer S, Barbas C, Caldeiras J, Caldeiras L, Goulart J, Cabral M, Rocha M, Garcia J, Souza P. Crit Care 2005; 9:P82. [DOI: 10.1186/cc3626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Ramalho MFPDT, Garcia JM, Esper CR, Vantini R, Alves BCA, Almeida Junior IL, Hossepian de Lima VFM, Moreira-Filho CA. Sexing of murine and bovine embryos by developmental arrest induced by high-titer H-Y antisera. Theriogenology 2004; 62:1569-76. [PMID: 15511544 DOI: 10.1016/j.theriogenology.2004.03.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2000] [Accepted: 03/01/2004] [Indexed: 10/26/2022]
Abstract
Murine and bovine embryos at the late morula stage were cultured in medium containing high-titer rat H-Y antisera. After 12h of incubation, embryos blocked at the late morulae stage were classified as males and those at the blastocyst stage were classified as females. Sexing of murine embryos by PCR and cytogenetics revealed that 83% of the embryos classified as males and 82% of those classified as females had their sex correctly predicted (P < 0.05). Bovine embryos were transferred to recipient females. Pregnancy rates were 71.4% (10/14) for embryos classified as males and 68.8% (11/16) for embryos classified as females. The sex was correctly predicted for 80% (8/10) of the embryos classified as males and for 81.8% (9/11) of those classified as females (overall accuracy, 80.9%, P < 0.05). Therefore, the induction of developmental arrest by high-titer male-specific antisera was an efficient strategy for non-invasive embryo sexing. The procedure was straightforward and has considerable commercial potential for sexing bovine embryos.
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Affiliation(s)
- M F P D-T Ramalho
- Department of Animal Reproduction, School of Veterinary and Agronomical Sciences, UNESP, Jaboticabal, SP, Brazil
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Abstract
Efficient artificial activation is indispensable for the success of cloning programs. Strontium has been shown to effectively activate mouse oocytes for nuclear transfer procedures, however, there is limited information on its use for bovine oocytes. The present study had as objectives: (1). to assess the ability of strontium to induce activation and parthenogenetic development in bovine oocytes of different maturational ages in comparison with ethanol; and (2). to verify whether the combination of both treatments improves activation and parthenogenetic development rates. Bovine oocytes were in vitro matured for 24, 26, 28, and 30 h, and treated with ethanol (E, 7% for 5 min) or strontium chloride (S, 10mM SrCl(2) for 5h) alone or in combination: ethanol+strontium (ES) and strontium+ethanol (SE). Activated oocytes were cultured in vitro in synthetic oviductal fluid (SOF) medium and assessed for pronuclear formation (15-16 h), cleavage (46-48 h) and development to the blastocyst stage (D7). Treatment with ethanol and strontium promoted similar results regarding pronuclear formation (E, 20-66.7%; S, 26.7-53.3%; P>0.05) and cleavage (E, 12.8-40.6%; S, 16.1-41.9%; P>0.05), regardless of oocyte age. The actions of both strontium and ethanol were influenced by oocyte age: ethanol induced greater activation rates after 28 and 30 h of maturation (48.4 and 66.7% versus 20.0 and 23.3% for 24 and 26 h, respectively; P<0.05) and strontium after 30 h (53.3%) was superior to 24 and 26 h (26.7% for both). Blastocyst development rates were minimal in all treatments (0.0-6.3%; P>0.05), however, when the mean (+/-S.D.) cell number in blastocysts at the same maturational period was compared, strontium treatment was superior to ethanol for activation rates (82+/-5.7 and 89.5+/-7.8 versus 54 and 61, at 28 and 30 h, respectively). Improved results were obtained by combined treatments. The combination of ethanol and strontium resulted in similar pronuclear formation (ES, 36.7-83.9%; SE, 53.1-90.3%) and cleavage rates (ES, 31.3-81.3%; SE, 65.6-80.7%). Regarding embryo development, there was no difference (P>0.05) between treatments, and blastocysts were only obtained in treatment SE at 24 and 26 h (6.5% for both). It is concluded that, SrCl(2) induces activation and parthenogenetic development in bovine oocytes.
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Affiliation(s)
- Simone Cristina Méo
- Departamento de Medicina Veterinária Preventiva e Reprodução Animal, FCAV-UNESP, Via de Acesso Paulo Donato Castellane s/n, CEP 14884-900, Jaboticabal, SP, Brazil.
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Ramtani S, Garcia JM, Doblare M. Computer simulation of an adaptive damage-bone remodeling law applied to three unit-bone bars structure. Comput Biol Med 2004; 34:259-73. [PMID: 15047436 DOI: 10.1016/s0010-4825(03)00057-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2002] [Accepted: 05/07/2003] [Indexed: 11/16/2022]
Abstract
It is well admitted that the mechanical loading plays an important role in the growth and maintenance of our skeleton, and that microdamage (i.e.: microcracks) occurs naturally when the bone is overloaded during day-to-day activities. It is also argued, from experimental and theoretical viewpoint, that the cells which built and rebuilt the skeleton are sensitive for both strain and microdamage. The recent damage-bone remodeling theory is employed here to study the mechanical response of the three unit-bone bars that simulate bone trabeculae in the form of truss. It is shown that under constant load, such a structure exhibit inhomogeneous strain and it's response to external applied load depends strongly upon the manner in which the microdamage is distributed.
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Affiliation(s)
- S Ramtani
- Université Paris Val de Marne, Faculté des Sciences et Technologie, Laboratoire de Biomécanique et Biomatériaux Osseux et Articulaires/CNRS UMR 7052, 61 avenue du général De Gaulle, 94010 Créteil cédex, France.
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Garcia JM, Subirana M, Sol�� I, Urrutia G, Bonfill X. Stomatherapists versus staff nurses for stoma care. Hippokratia 2004. [DOI: 10.1002/14651858.cd004648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Garcia JM, Rodriguez R, Dominguez G, Silva JM, Provencio M, Silva J, Colmenarejo A, Millan I, Muñoz C, Salas C, Coca S, España P, Bonilla F. Prognostic significance of the allelic loss of the BRCA1 gene in colorectal cancer. Gut 2003; 52:1756-63. [PMID: 14633957 PMCID: PMC1773878 DOI: 10.1136/gut.52.12.1756] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND Survival at the intermediate stage of colorectal cancer (CRC) is less predictable than in the early and advanced stages. Several genetic markers possibly involved in growth and progression of CRC can be used for prognosis. AIMS This study investigated the proportion of allelic loss (loss of heterozygosity (LOH)) at the BRCA1 locus in sporadic CRC and its value in patient prognosis. PATIENTS AND METHODS A total of 314 patients were investigated for LOH at the BRCA1 locus using polymerase chain reaction by means of three intragenic polymorphic microsatellite markers. Allelic losses were compared with clinicopathological characteristics of patients, recurrence rate, disease free survival (DFS), and overall survival. RESULTS Twenty six patients were excluded because of microsatellite instability. Of the remaining 288 cases, 244 (84.7%) were informative, with 97 (39.8%) patients bearing BRCA1 LOH. Recurrence rate was higher in patients with LOH (p=0.0003), and DFS was 73.3% (SEM 5.7) at five years in patients without LOH, and 49.2% (7.1) in cases with positive allelic loss (p=0.0004). Retention of alleles at the BRCA1 locus was associated with a favourable DFS in stages I and II (p<0.05). The presence of LOH was also significantly associated with short overall survival (p=0.02). Multivariate analysis in the complete series showed that stage (p=0.006) and lymph node metastases (> or =4 nodes, p=0.0001; 1-3 nodes, p=0.038) were independent prognostic factors. However, multivariate study by stages revealed that BRCA1 LOH was an independent prognostic factor in stages I and II (p=0.001). CONCLUSIONS BRCA1 LOH is a molecular alteration present in CRC, with unfavourable repercussions for overall survival, that could be considered as an outstanding independent prognostic factor in stages I and II.
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Affiliation(s)
- J M Garcia
- Molecular Genetics Unit, Hospital Universitario Puerta de Hierro, Madrid, Spain
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