Journal of Food Science and Technology

, Volume 54, Issue 7, pp 1953–1963 | Cite as

Anthocyanins enriched purple tea exhibits antioxidant, immunostimulatory and anticancer activities

  • Robin Joshi
  • Ajay Rana
  • Vinay Kumar
  • Dharmesh Kumar
  • Yogendra S. Padwad
  • Sudesh Kumar Yadav
  • Ashu GulatiEmail author
Original Article


Purple coloured tea shoot clones have gained interest due to high content of anthocyanins in addition to catechins. Transcript expression of genes encoding anthocyanidin reductase (ANR), dihydroflavonol-4-reductase (DFR), anthocyanidin synthase (ANS), flavonol synthase (FLS) and leucoantho cyanidin reductase (LAR) enzymes in three new purple shoot tea clones compared with normal tea clone showed higher expression of CsDFR, CsANR, CsANS and lower expression of CsFLS and CsLAR in purple shoot clones compared to normal clone. Expression pattern supported high content of anthocyanins in purple tea. Four anthocyanins (AN1–4) were isolated and characterized by UPLC-ESI-QToF-MS/MS from IHBT 269 clone which recorded highest total anthocyanins content. Cyanidin-3-O-β-d-(6-(E)-coumaroyl) glucopyranoside (AN2) showed highest in vitro antioxidant activity (IC50 DPPH = 25.27 ± 0.02 μg/mL and IC50 ABTS = 10.71 ± 0.01 μg/mL). Anticancer and immunostimulatory activities of cyanidin-3-glucoside (AN1), cyanidin-3-O-β-d-(6-(E)-coumaroyl) glucopyranoside (AN2), delphinidin-3-O-β-d-(6-(E)-coumaroyl) glucopyranoside (AN3), cyanidin-3-O-(2-O-β-xylopyranosyl-6-O-acetyl)-β-glucopyranoside (AN4) and crude anthocyanin extract (AN5) showed high therapeutic perspective. Anthocyanins AN1–4 and crude extract AN5 showed cytotoxicity on C-6 cancer cells and high relative fluorescence units (RFU) at 200 μg/mL suggesting promising apoptosis induction activity as well as influential immunostimulatory potential. Observations demonstrate potential of purple anthocyanins enriched tea clone for exploitation as a nutraceutical product.


Tea Anthocyanins Antioxidant activity Cytotoxicity Immunostimulatory activity 



Camellia sinensis



Authors acknowledge financial assistance received from Council of Scientific and Industrial Research, New Delhi, India under Main Lab Project No. MLP 0070 (Purification, characterization and bioprocessing of nutraceuticals from tea).

Supplementary material

13197_2017_2631_MOESM1_ESM.doc (10.4 mb)
Supplementary material 1 (DOC 10598 kb)


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Copyright information

© Association of Food Scientists & Technologists (India) 2017

Authors and Affiliations

  • Robin Joshi
    • 1
  • Ajay Rana
    • 1
  • Vinay Kumar
    • 2
  • Dharmesh Kumar
    • 1
  • Yogendra S. Padwad
    • 1
  • Sudesh Kumar Yadav
    • 1
  • Ashu Gulati
    • 1
    Email author
  1. 1.Food and Nutraceutical Division, Academy of Scientific and Innovative ResearchCSIR-Institute of Himalayan Bioresource TechnologyPalampurIndia
  2. 2.Central University of PunjabBathindaIndia

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