کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5859776 1562619 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In vitro cytotoxicity of Nicotiana gossei leaves, used in the Australian Aboriginal smokeless tobacco known as pituri or mingkulpa
ترجمه فارسی عنوان
سیتوتوکسی سیتوپلاسم در برگ های نیکوتیاانا گوزی که در توتون و تنباکوی دود سیگار استرالیایی نامیده می شود به نام پیتوری یا جنبولپا
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست بهداشت، سم شناسی و جهش زایی
چکیده انگلیسی


- We report on alkaloids chemistry and cytotoxicity of N. gossei leaves used in pituri preparation.
- The nicotine contained in extract from N. gossei leaves is not the source of its high cytotoxicity.
- The carcinogenic NNN and NNK in extract from N. gossei leaves are likely to cause high cytotoxicity.

The Aboriginal population of Central Australia use endemic Nicotiana species to make a smokeless tobacco product known usually as pituri or mingkulpa. Nicotiana leaves are masticated with wood ash into a 'quid' that is chewed/sucked for absorption of nicotine. In addition to nicotine, smokeless tobacco products contain a spectrum of biologically active compounds that may contribute to effects on health. The objective of this study was to quantify nicotine, and related alkaloids and tobacco specific nitrosamines (TSNAs), in Nicotiana leaves used in pituri, and compare in vitro toxicity of pure nicotine with Nicotiana leaf extract at the same concentration of nicotine. An aqueous extract of dry leaves of Nicotiana gossei and a reference smokeless tobacco (CORESTA CRP2) were quantified for major pyridine alkaloids and TSNAs using HPLC-UV and LC-MS/MS. A range of extract concentrations and corresponding concentrations of nicotine standard were tested using an MTS assay to measure human lung epithelium cell (A549) survival. Cells treated for 24 h with the maximum concentration of 1.5 mg/ml of nicotine resulted in 77% viability. In contrast, extracts from N. gossei leaves and CRP2 containing a similar concentration of nicotine (1.3 mg/ml) resulted in remarkably lower viability of 1.5 and 6%, respectively. Comparison of cytotoxicity of pure nicotine with that of the extracts revealed that nicotine was not the source of their cytotoxicity. Other biologically active compounds such as the known carcinogens NNK and NNN, derived from nicotine and nornicotine and found to be present in the smokeless tobacco extracts, may be responsible.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Toxicology Letters - Volume 254, 8 July 2016, Pages 45-51
نویسندگان
, , , ,