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Comment on Saber et al. (2019) Commentary: the chronic inhalation study in rats for assessing lung cancer risk may be better than its reputation

机译:评论Saber等人。 (2019)评论:评估肺癌风险大鼠的慢性吸入研究可能比其声誉更好

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摘要

The authors’ statements on species differences in lung particle clearance after PSLT exposure are incorrect. For example, they write in rats, but not in hamsters or mice, impaired clearance has been observed at high lung burden” and “particle clearance rates in mice, hamsters and rats depend on the lung burden: lower clearance rates are observed with increasing lung burden, but the impaired clearance is only observed in rats”. To support their statements, Saber et al [1] cite a study by Elder et al. [6]; however, the actual results of the Elder et al. study directly contradict the authors’ assertions. Specifically, Elder et al. observed a significant, dose-dependent impairment of lung particle clearance in rats, mice and hamsters exposed for 13 weeks by inhalation to carbon black (CB) (see Elder et al. [6] Table 4) and concluded all three species showed lung particle overload under similar exposure scenarios. The Elder et al. findings concur with other studies, including Muhle et al. [7] who demonstrated that rats and hamsters both exhibit impaired lung particle clearance at high lung burdens of PSLT.
机译:PSLT暴露后肺粒子间隙物种差异的陈述是不正确的。例如,它们在大鼠中写入,但不在仓鼠或小鼠中,在高肺部负担中观察到损害的清除“,小鼠,仓鼠和大鼠的粒子间隙率取决于肺部负担:随着肺的增加观察到较低的间隙率负担,但仅在大鼠中观察到受损的清除“。为了支持他们的陈述,Saber等[1]通过Elder等人进行了研究。 [6];但是,Elder等人的实际结果。研究直接与作者的断言相矛盾。具体而言,et or。观察到大鼠肺颗粒间隙的显着,剂量依赖性损害,小鼠和仓鼠通过吸入到炭黑(CB)暴露13周(参见or or。[6]表4)并结束所有三种物种显示肺部颗粒在类似的曝光方案下过载。 et or。调查结果同意其他研究,包括Muhle等人。 [7]谁证明了大鼠和仓鼠在PSLT的高肺负担下表现出肺部颗粒间隙受损。

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