RESUMO
OBJECTIVE: Skeletal diseases, both degenerative and secondary to trauma, infections or tumors, represent an ideal target for regenerative medicine and in the last years, stem cells have been considered as good candidates for in vitro and in vivo bone regeneration. To date, several stem cell sources, such as adult mesenchymal stem cells, embryonic stem cells (ESCs) and induced pluripotent stem cells (iPSCs), have shown significant osteogenic potential. MATERIALS AND METHODS: In this narrative review, we analyze the possible advantages of the use of AFSCs in the treatment of skeletal diseases, especially through the application of tissue engineering and biomaterials. RESULTS: Among the different sources of stem cells, great attention has been recently devoted to amniotic fluid-derived stem cells (AFSC) characterized by high renewal capacity and ability to differentiate along several different lineages. CONCLUSIONS: Due to these features, AFSCs represent an interesting model for regenerative medicine, also considering their low immunogenicity and the absence of tumor formation after transplantation in nude mice.
Assuntos
Líquido Amniótico/citologia , Células-Tronco , Engenharia Tecidual , Animais , Regeneração Óssea , Osso e Ossos/citologia , Diferenciação Celular , Transformação Celular Neoplásica , Células-Tronco Embrionárias , Humanos , Camundongos , Camundongos Nus , Medicina RegenerativaRESUMO
Dental pulp undergoes a number of changes passing from healthy status to inflammation due to deep decay. These changes are regulated by several genes resulting differently expressed in inflamed and healthy dental pulp, and the knowledge of the processes underlying this differential expression is of great relevance in the identification of the pathogenesis of the disease. In this study, the gene expression profile of inflamed and healthy dental pulps were compared by microarray analysis, and data obtained were analyzed by Ingenuity Pathway Analysis (IPA) software. This analysis allows to focus on a variety of genes, typically expressed in inflamed tissues. The comparison analysis showed an increased expression of several genes in inflamed pulp, among which IL1β and CD40 resulted of particular interest. These results indicate that gene expression profile of human dental pulp in different physiological and pathological conditions may become an useful tool for improving our knowledge about processes regulating pulp inflammation.
Assuntos
Antígenos CD40/fisiologia , Polpa Dentária/metabolismo , Interleucina-1beta/fisiologia , Análise de Sequência com Séries de Oligonucleotídeos , Pulpite/metabolismo , Transcriptoma , Adulto , Antígenos CD40/genética , Humanos , Interleucina-1beta/genética , Pulpite/etiologiaRESUMO
Deficit of the short stature homeobox containing gene (SHOX) accounts for 2.15% of cases of idiopathic short stature (ISS) and 50-100% of cases of Leri-Weill dyschondrosteosis (LWD). It has been demonstrated that patients with SHOX deficit show a good response to treatment with GH. Thus, the early identification of SHOX alterations is a crucial point in order to choose the best treatment for ISS and LWD patients. In this study, we analyze the most commonly used molecular techniques for the detection of SHOX gene alterations. multiple ligation-dependent probe amplification analysis appears to represent the gold standard for the detection of deletion involving the SHOX gene or the enhancer region, being able to show both alterations in a single assay.
Assuntos
Proteínas de Homeodomínio/genética , Proteínas de Homeodomínio/fisiologia , Mutação/genética , Técnicas de Amplificação de Ácido Nucleico , Nanismo Hipofisário/diagnóstico , Nanismo Hipofisário/genética , Elementos Facilitadores Genéticos/genética , Feminino , Testes Genéticos/métodos , Transtornos do Crescimento/diagnóstico , Transtornos do Crescimento/genética , Humanos , Masculino , Osteocondrodisplasias/diagnóstico , Osteocondrodisplasias/genética , Proteína de Homoeobox de Baixa EstaturaRESUMO
The use of titanium plates and screws for osteosynthesis is considered to be an effective treatment for different kinds of fractures in orthopedic surgery. The aim of the present study is to test the ability of titanium screws to promote the growth of osteoblasts obtained from human amniotic fluid stem cells (AFS). Osteoblastic differentiation was assessed by RT-PCR of specific markers such as COL1, ONC, OPN, OCN, OPG, BMP-4 and Runx2. Mineralization was demonstrated by the presence of red depositions. Adherent cells were found to cover the whole surface of titanium screw by Scanning Electron Microscopy (SEM). The result indicates the excellent growth of osteoblasts obtained from amniotic fluid on a titanium surface and could represent an important point in view of a possible therapeutic application of AFS cells.