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1.
Biol. Res ; 45(3): 289-296, 2012. ilus
Article in English | LILACS | ID: lil-659286

ABSTRACT

Currently, one of the main threats to public health is diabetes mellitus. Its most detrimental complication is diabetic nephropathy (DN), a clinical syndrome associated with kidney damage and an increased risk of cardiovascular disease. Irrespective of the type of diabetes, DN follows a well-known temporal course. The earliest detectable signs are microalbuminuria and histopathological changes including extracellular matrix deposition, glomerular basement membrane thickening, glomerular and mesangial expansion. Later on macroalbuminuria appears, followed by a progressive decline in glomerular filtration rate and the loss of glomerular podocytes, tubulointerstitial fibrosis, glomerulosclerosis and arteriolar hyalinosis. Tight glycemic and hypertension controls remain the key factors for preventing or arresting the progression of DN. Nevertheless, despite considerable educational effort to control the disease, a significant number of patients not only develop DN, but also progress to chronic kidney disease. Therefore, the availability of a strategy aimed to prevent, delay or revert DN would be highly desirable. In this article, we review the pathophysiological features of DN and the therapeutic mechanisms of multipotent mesenchymal stromal cells, also referred to as mesenchymal stem cells (MSCs). The perfect match between them, together with encouraging pre-clinical data available, allow us to support the notion that MSC transplantation is a promising therapeutic strategy to manage DN onset and progression, not only because of the safety of this procedure, but mainly because of the renoprotective potential of MSCs.


Subject(s)
Animals , Humans , Diabetic Nephropathies/prevention & control , Mesenchymal Stem Cell Transplantation/methods , Cell Differentiation , Cells, Cultured , Disease Progression , Diabetic Nephropathies/pathology , Diabetic Nephropathies/physiopathology
2.
Rev. Estomat ; 14(1): 6-10, sept. 2006. ilus
Article in Spanish | LILACS | ID: lil-565745

ABSTRACT

El quiste dentígero es un hallazgo clínico casual, ordinariamente asociado con la alteración en la erupción de caninos,premolares y terceros molares que pueden no estar presentes al examen clínico, especialmente después de la época de erupción normal de los dos primeros tipos de dientes mencionados. Su diagnostico se realiza durante la exploración radiográfica de rutina (Rx panorámica) en Odontología. Un espacio folicular mayor de 3 mm alrededor de la corona de un diente no erupcionado es un criterio razonable para diagnosticar la lesión como quiste dentígero. El quiste dentígero es considerado el segundo quiste odontogénico que con mayor frecuencia se identifica en los maxilares y representan el 24 de los quistes de la mandíbula, su mayor incidencia se presenta entre la segunda y tercera década de la vida. Se caracteriza por ser asintomático, aunque la expansión y adelgazamiento de las corticales del área involucrada puede llegar a producir asimetrías faciales. Con el paso del tiempo, dado el continuo crecimiento, es factible encontrar reabsorciones radiculares de dientes contiguos, dolor, parestesia, hiperplasia gingival, infección, fístula y fractura patológica. Por el riesgo que significa su presencia y evolución, se recomienda entonces retirar los dientes impactados para prevenir la ocurrencia de quistes mayores y tumores.


Dentigerous cyst is a casual clinical finding associated with an alteration on the eruption of canine, premolares and third molars. Its diagnostics is bassed on routinare periapical and panoramic Rx examinations. A space folicular bigger than 3 mm around the crown of a tooth is a reasonable approach to diagnose the lesion like cyst dentígerous. Dentígerous cyst is considered the second more frecuent maxilary odontogenic cyst and represent 24 of the jaw cysts, its biggest incidence it is presented between the second and third decade of the life and is characterized to be asymptomatic, for the expansion and loss of the cortical wall even producing facial asymmetries, radicular reabsorptions of contiguous teeth, pain, parestesia, gingival hiperplasy, infection, fistule and pathological fractures. It is recommended then to retire the impacted teeth to prevent the occurrence of cysts and tumors.


Subject(s)
Dentigerous Cyst , Dental Occlusion , Diagnosis, Differential , Tooth, Impacted , Tooth, Unerupted
3.
Ciencia (Méx.) ; 45(1): 21-34, ene.-mar. 1994. tab, ilus
Article in Spanish | LILACS | ID: lil-143287

ABSTRACT

El factor de crecimiento neuronal (FCN), miembro de la familia de las neurotrofinas, es una proteína que desempeña un papel decisivo en la sobrevivencia y metabolismo de las neuronas colinérgicas del sistema nervioso central (SNC). Debido a que el sistema colinérgico del SNC ha sido involucrado en los procesos de aprendizaje y memoria, durante la última década se han puesto en práctica varios procedimientos experimentales con la finalidad de administrar el FCN en el SCN. Simultáneamente se han registrado importantes avances en el conocimiento de las características inherentes a la estructura así como a los mecanismos de acción y biosíntesis de esta molécula. La presente revisión intenta mostrar un panorama global acerca del estado actual de las investigaciones en torno a estos temas


Subject(s)
Central Nervous System/cytology , Central Nervous System/physiology , Cell Differentiation/physiology , Fibroblast Growth Factors/chemical synthesis , Fibroblast Growth Factors/physiology , Neurons/cytology , Neurons/physiology
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