Journal
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
Volume 99, Issue 4, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jics.2022.100409
Keywords
Alkanna tinctoria; Alkanet; Liver tissue; Mordant; Natural staining
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Staining of tissue is an important process in histotechnology for disease examination and diagnosis. This study investigated the dyeing ability of Alkanna tinctoria extract on unstained cells from rat liver. Different metal salts were used to obtain different colors. The results showed successful staining of cytoplasm with different colors using the extract and various mordants.
Staining of tissue is a significant process in histotechnology and staining techniques are used in the examination and diagnosis of diseases. The increase of international awareness for the environment, ecology, and health directed people to reduce toxic effluents and stop usage of dangerous chemical dyes. The present trend throughout the world is shifting towards to use of natural products over their synthetic alternatives. Therefore, in this study, the dyeing ability of alkanet plant on the cells of unstained sections taken from Wistar rat liver was investigated. The extract of Alkanna tinctoria contain naphthaquinone group of dyestuff. Chemical characterization of A. tinctoria extract was performed with HPLC-TOF/MS and UV spectra analysis, respectively. Different metal salts were used in the staining processes in order to obtain different colors. In the staining of without adding mordant (metal salt) to the extract, pale brown staining was obtained in the cytoplasm. Light pink color was obtained with the addition of CuSO4 mordant. Dark pink-red color was achieved by adding alum, and also NiSO4 was added for light purple staining. The staining of cytoplasm of different cells in liver tissue was achieved successfully with the extract of A. tinctoria and different colors were obtained using various mordants.
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