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首页> 外文期刊>Toxicologic pathology >Morphological classification of dental lesions induced by various antitumor drugs in mice.
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Morphological classification of dental lesions induced by various antitumor drugs in mice.

机译:各种抗肿瘤药在小鼠中引起的牙齿损伤的形态分类。

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To characterize and compare maxillary incisor lesions caused by various antitumor drugs, male BALB/c mice were given a single intravenous injection of an estimated 10% lethal dose (LD10)) of 5-fluorouracil (5-FU), adriamycin (ADR), mitomycin C (MMC), vinblastine sulfate (VBL). taxotere (TXR), irinotecan hydrochloride (CPT-11), DX-8951f, or cisplatin (CDDP). After 3, 5, 10, 15, and 60 days, the animals were sacrificed, and the maxillary incisors were examined microscopically. The dental lesions observed were classified into 4 different types on the basis of their morphological features. The lesion due to 5-FU was characterized by focal defects in the dentin, and this injury was reversible (transient dentin injury). ADR- or MMC-induced lesions were defined by abnormal structure of the apical aspect of the tooth and irregular odontogenesis, lasting for a long period (persistent apical injury). Treatment with VBL or TXR showed irregular enamel formation and abnormal dentinogenesis. Their targets were considered to be both immature and mature odontogenic cells (diffuse dental injury). Exposure to CPT-11, DX-8951f, or CDDP elicited minor reductions in a few precursor cells in the epithelial sheath on day 3, but no prominent dental abnormalities were seen thereafter (nontoxic injury). In conclusion, antitumor drugs can cause a variety of dental lesions that vary temporally and spatially, making histopathological examination of the maxillary incisor an important component of the safety assessment process for novel antitumor drugs.
机译:为了表征和比较由多种抗肿瘤药物引起的上颌切牙病变,雄性BALB / c小鼠单次静脉注射5-氟尿嘧啶(5-FU),阿霉素(ADR)的估计致死剂量(LD10)10%,丝裂霉素C(MMC),硫酸长春碱(VBL)。泰索帝(TXR),盐酸伊立替康(CPT-11),DX-8951f或顺铂(CDDP)。 3、5、10、15和60天后,处死动物,并显微镜检查上颌切牙。根据其形态特征将观察到的牙齿病变分为4种类型。 5-FU引起的病变以牙本质中的局灶性缺损为特征,这种损伤是可逆的(短暂性牙本质损伤)。 ADR或MMC诱导的病变由牙齿的顶面结构异常和不规则的成牙作用而定义,持续时间长(持续性顶尖损伤)。 VBL或TXR处理显示牙釉质不规则形成和异常的牙本质生成。他们的目标被认为是未成熟和成熟的牙源性细胞(弥散性牙齿损伤)。在第3天,暴露于CPT-11,DX-8951f或CDDP会引起上皮鞘中一些前体细胞的少量减少,但此后未发现明显的牙齿异常(无毒损伤)。总之,抗肿瘤药物可引起随时间和空间变化的多种牙齿损伤,使上颌切牙的组织病理学检查成为新型抗肿瘤药物安全性评估过程的重要组成部分。

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