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Life Span and Renal Morphological Characterization of the SAMP1//Ka Mouse

机译:SAMP1 // Ka小鼠的寿命和肾脏形态特征

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The senescence-accelerated-mouse prone 1 (SAMP1) is considered to be a model of accelerated senility and it also develops severe kidney damage. The SAMP1//Ka mouse is a specific pathogen free (SPF) subline of SAMP1. The present study examined the life span of the SAMP1//Ka mouse and morphologically investigated the kidneys of this animal at 3, 4, 5, 9, 12, 15, 18 and 24 months of age. Males survived for an average of 25 months and females for 28 months. The median lifespan was 18 months for males and 20 for females. Focal cell infiltration and thickening of the basement membrane in the glomerular capsules or tubules appeared from 4 months of age. At 12 months old, glomerular lesions with expansion of the mesangial matrix and thickening of the basement membrane as well as scar lesions in the outer cortex appeared, and amyloid was deposited in the interstitium or glomeruli from 18 months of age. Morphometrically, although the area of the kidney sections was increased at 24 months of age, the diameter of the renal corpuscles, the number of nuclei of the proximal convoluted tubules and the percentage of renal corpuscles with a cuboidal glomerular capsule did not change with age. The results of the present study indicate that the life span of the SAMP1//Ka is increased and that their age-related renal changes differ from those of the original SAMP1.
机译:衰老加速小鼠倾向1(SAMP1)被认为是加速衰老的模型,它还会发展严重的肾脏损害。 SAMP1 // Ka小鼠是SAMP1的特定无病原体(SPF)子系。本研究检查了SAMP1 // Ka小鼠的寿命,并对这只动物在3、4、5、9、12、15、18和24个月大时的肾脏进行了形态学研究。男性平均存活25个月,女性平均存活28个月。男性的平均寿命为18个月,女性为20个月。肾小球囊或小管中的局灶性细胞浸润和基底膜增厚从4个月大开始出现。在12个月大时,出现肾小球病变,伴有肾小球系膜基质扩张,基底膜增厚以及外皮层的瘢痕病变,并且从18个月大开始,淀粉样蛋白沉积在间质或肾小球中。形态学上,尽管肾脏切面的面积在24个月大时有所增加,但肾小体的直径,近端曲折小管的核数以及具有长方体肾小球囊的肾小体的百分比并未随年龄变化。本研究的结果表明,SAMP1 // Ka的寿命得以延长,并且其与年龄相关的肾脏变化与原始SAMP1不同。

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