ABSTRACT
OBJECTIVE: To determine the prevalence of dry eye symptoms (DES) and associated risk factors among adults in Tlaxcala, Mexico. MATERIALS AND METHODS: A cross-sectional population-based study that included 1 508 individuals aged ≥50 years who answered the Dry Eye Questionnaire (DEQ5), with a score ranging between 0 and 22; the following categories were defined: no DES (<6); mild-moderate DES (6 to 11) and severe DES (≥12). RESULTS: The prevalence of DES was 41.1% (95%CI 38.6-43.6), and was higher in women (OR=2.26, 95%IC 1.70-3.00), in individuals with smoking index of <10 (OR=1.40, 95%CI 1.05-1.87) and ≥10 pack-years (OR=2.29, 95%CI 1.44-3.63), compared to never-smokers, subjects with history of ever consuming alcohol (OR=1.31, 95%CI 1.02-1.70), and those receiving antihypertensive treatment (OR=1.29, 95%CI 1.00-1.65). CONCLUSIONS: Dry eye symptoms were highly prevalent in the study population and were associated with sex, smoking, alcohol consumption, and antihypertensive medications.
Subject(s)
Dry Eye Syndromes/diagnosis , Aged , Cross-Sectional Studies , Dry Eye Syndromes/epidemiology , Female , Humans , Male , Mexico/epidemiology , Middle Aged , Prevalence , Risk Factors , Symptom AssessmentABSTRACT
Abstract: Objective: To determine the prevalence of dry eye symptoms (DES) and associated risk factors among adults in Tlaxcala, Mexico. Materials and methods: A cross-sectional population-based study that included 1 508 individuals aged ≥50 years who answered the Dry Eye Questionnaire (DEQ-5), with a score ranging between 0 and 22; the following categories were defined: no DES (<6); mild-moderate DES (6 to 11) and severe DES (≥12). Results: The prevalence of DES was 41.1% (95%CI 38.6-43.6), and was higher in women (OR=2.26, 95%IC 1.70-3.00), in individuals with smoking index of <10 (OR=1.40, 95%CI 1.05-1.87) and ≥10 pack-years (OR=2.29, 95%CI 1.44-3.63), subjects with history of ever consuming alcohol (OR=1.31, 95%CI 1.02-1.70), and those receiving antihypertensive treatment (OR=1.29, 95%CI 1.00-1.65). Conclusion: Dry eye symptoms were highly prevalent in the study population and were associated with sex, smoking, alcohol consumption, and antihypertensive medications.
Resumen: Objetivo: Determinar la prevalencia de síntomas de ojo seco y factores de riesgo asociados en población adulta de Tlaxcala, México. Material y métodos: Se realizó un estudio de base poblacional con 1 508 individuos ≥50 años que respondieron el Dry Eye Questionnaire (DEQ-5) y se definieron las siguientes categorías: sin síntomas (<6); síntomas leve-moderado (6 a11) y síntomas severos (≥12). Resultados: La prevalencia de síntomas de ojo seco fue de 41.1% (IC95% 38.6-43.6); fue mayor en mujeres (OR=2.26, IC95% 1.70-3.00), en individuos con índice de tabaquismo <10 (OR=1.40, IC95% 1.05-1.87) y ≥10 paquetes-año (OR=2.29, IC95% 1.44-3.63), en sujetos con historia de consumo de alcohol (OR=1.31, IC95%1.02-1.70) y en aquellos con tratamiento antihipertensivo (OR=1.29, IC95% 1.00-1.65). Conclusión: La frecuencia de síntomas de ojo seco fue altamente prevalente en la población de estudio y se asoció con sexo, tabaquismo, consumo de alcohol y medicamentos antihipertensivos.
Subject(s)
Humans , Male , Female , Middle Aged , Aged , Dry Eye Syndromes/diagnosis , Dry Eye Syndromes/epidemiology , Prevalence , Cross-Sectional Studies , Risk Factors , Symptom Assessment , Mexico/epidemiologyABSTRACT
PURPOSE: Mesenchymal stromal stem cells (MSC) are non-hemopoietic cells with the capacity to self-renewal and to differentiate into various cell lineages of mesenchymal origin. More recently, the immune regulatory potential of MSC has been focused on. Furthermore, mesenchymal stem cells obtained from diverse tissues possess immunomodulatory properties and inhibit proinflammatory immune reactions. The aim of this study was to determine the immunosuppressive characteristics of mesenchymal stem cells isolated from human limbal (L-MSC) tissue. METHODS: L-MSC were enzymatically obtained from cadaveric sclero-corneal rims and expanded in vitro. The cells were characterized by flow cytometry using specific antibodies to mesenchymal stem cells markers. Clonogenic and tissue transdifferentiation in vitro assays were performed. The effect of L-MSC soluble factors on T cell proliferation was determined by flow cytometry. Cytokines such as transforming growth factor-b1 (TGF-ß1) and Interleukin-10 (IL-10) on supernatants from L-MSC were identified by enzyme-linked immunosorbent assay (ELISA). RESULTS: Herein, we described that L-MSC cells in vitro-expanded were positive for the expression of vimentin, CD29, CD34, CD39, CD73 and CD105 mesenchymal stem cells markers; meanwhile, this cell population was negative to CD45 and HLA-DR hemopoietic markers as well as to cytokeratin expression. Clonogenic assays showed that these cells were able to form colonies. In addition, this L-MSC population had the ability to transdifferentiate into neurons and chondrocytes and to form tubular networks on matrigel in the presence of vascular endothelial growth factor (VEGF). These results indicated that these cells were stem cells. Additionally, soluble factors secreted by L-MSC were capable of mediating the suppression of T-cell receptor (TCR)-engagement lymphocyte proliferation. In an attempt to identify the possible immunosuppressive factors secreted by L-MSC, TGFß1 and IL-10 cytokines were determined in the L-MSC supernatants by ELISA; interestingly, TGFß1 was constitutively secreted by this cell population; in contrast, IL-10 was not detectable. Moreover, TGFßRII neutralizing antibodies were able to revert the TCR-engagement lymphocyte proliferation inhibition mediated by L-MSC. Thus, TGFß1 secreted by L-MSC was able to suppress T cell proliferation. CONCLUSIONS: Taken together these results, explain in part the immunosuppressive features of this cell population obtained from the human limbus. All these characteristics make this cell population an excellent source to be used in the regenerative medicine.
