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Analysis of the area and the number of pulmonary alveoli through the normal aging process in CD1 mouse
bioRxiv - Pathology Pub Date : 2020-12-11 , DOI: 10.1101/2020.12.11.421032
Marta Ortega-Martínez , Esthefania Gutiérrez-Arenas , Vanessa Gutiérrez-Dávila , Alberto Niderhauser-García , Ricardo M. Cerda-Flores , Gilberto Jaramillo-Rangel

During the aging process, the lung exhibits structural changes accompanied by a decline in its function. The related information currently available is still scarce and contradictory. In addition, changes in some pulmonary parameters through aging process are species- and strain- dependent. The aim of this study was the assessment of the area and the number of pulmonary alveoli through the normal aging process in CD1 mouse. Paraffin-embedded sections of lungs from CD1 mice at age of 2, 6, 12, 18, or 24 months were stained with hematoxylin and eosin and examined using a light microscope. Images were captured using a camera linked to an image analysis software to measure areas and count alveoli. There was a significant difference in the alveolar area among the ages analyzed (F=87.53, Sig.=0.000). The alveolar area of the 6-, 12-, 18-, and 24-month-old mice was significantly greater (all p values < 0.001) than in mice at 2 months of age. Also, the alveolar number was significantly different among the ages tested (F=3.21, Sig.=0.023). The number of alveoli in mice at 2 months of age was greater than in mice at all other age groups, reaching statistical significance when compared with the 6-, 12-, and 18-month-old mice ( p values of 0.044, 0.014, and 0.002, respectively). Thus, we observed an increase in alveolar area and a decrease in alveolar number through the aging process. This information might be useful to understand pathologic changes underlying susceptibility of elderly individuals to chronic lower respiratory tract diseases.

中文翻译:

通过CD1小鼠正常衰老过程分析肺泡的面积和数量

在衰老过程中,肺部显示结构变化,同时功能下降。当前可用的相关信息仍然稀缺且矛盾。此外,随着年龄的增长,某些肺参数的变化与物种和菌株有关。本研究的目的是通过CD1小鼠的正常衰老过程评估肺泡的面积和数量。用苏木精和曙红对2、6、12、18或24个月大的CD1小鼠肺部石蜡包埋的切片进行染色,并使用光学显微镜进行检查。使用链接到图像分析软件的相机捕获图像,以测量面积并计数肺泡。在所分析的年龄之间,牙槽区域存在显着差异(F = 87.53,Sig。= 0.000)。6、12、18,和24个月大的小鼠明显大于所有2个月大的小鼠(所有p值<0.001)。同样,在所测试的年龄之间,肺泡数目显着不同(F = 3.21,Sig。= 0.023)。与6、12和18个月大的小鼠相比,2个月大的小鼠中的肺泡数量要多于所有其他年龄组的小鼠(p值为0.044、0.014,和0.002)。因此,我们观察到了在衰老过程中肺泡面积的增加和肺泡数目的减少。该信息可能有助于了解老年患者对慢性下呼吸道疾病的易感性的病理变化。在测试年龄之间,肺泡数目明显不同(F = 3.21,Sig。= 0.023)。与6、12和18个月大的小鼠相比,2个月大的小鼠中的肺泡数量要多于所有其他年龄组的小鼠(p值为0.044、0.014,和0.002)。因此,我们观察到了在衰老过程中肺泡面积的增加和肺泡数目的减少。该信息可能有助于了解老年患者对慢性下呼吸道疾病的易感性的病理变化。在测试年龄之间,肺泡数目明显不同(F = 3.21,Sig。= 0.023)。与6、12和18个月大的小鼠相比,2个月大的小鼠中的肺泡数量要多于所有其他年龄组的小鼠(p值为0.044、0.014,和0.002)。因此,我们观察到了在衰老过程中肺泡面积的增加和肺泡数目的减少。该信息可能有助于了解老年患者对慢性下呼吸道疾病的易感性的病理变化。和0.002)。因此,我们观察到了在衰老过程中肺泡面积的增加和肺泡数目的减少。该信息可能有助于了解老年患者对慢性下呼吸道疾病的易感性的病理变化。和0.002)。因此,我们观察到了在衰老过程中肺泡面积的增加和肺泡数目的减少。该信息可能有助于了解老年患者对慢性下呼吸道疾病的易感性的病理变化。
更新日期:2020-12-12
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