Format

Send to

Choose Destination
J Photochem Photobiol B. 2017 Jul;172:139-148. doi: 10.1016/j.jphotobiol.2017.05.018. Epub 2017 May 19.

Piperine attenuates UV-R induced cell damage in human keratinocytes via NF-kB, Bax/Bcl-2 pathway: An application for photoprotection.

Author information

1
Photobiology Laboratory, System Toxicology and Health Risk Assessment Group, Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India; Department of Radiodiagnosis, King George's Medical University, Lucknow, Uttar Pradesh 226003, India; Department of Radiotherapy, King George's Medical University, Lucknow, Uttar Pradesh 226003, India.
2
Photobiology Laboratory, System Toxicology and Health Risk Assessment Group, Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India.
3
Environmental Information System Centre, CSIR-Indian Institute of Toxicology Research, Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India.
4
Department of Radiodiagnosis, King George's Medical University, Lucknow, Uttar Pradesh 226003, India.
5
Department of Radiotherapy, King George's Medical University, Lucknow, Uttar Pradesh 226003, India.
6
Photobiology Laboratory, System Toxicology and Health Risk Assessment Group, Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow 226001, Uttar Pradesh, India. Electronic address: id-rsray@iitr.res.in.

Abstract

Chronic ultraviolet radiation (UV-R) exposure causes skin disorders like erythema, edema, hyperpigmentation, photoaging and photocarcinogenesis. Recent research trends of researchers have focused more attention on the identification and use of photo stable natural agents with photoprotective properties. Piperine (PIP), as a plant alkaloid, is an important constituent present in black pepper (Piper nigrum), used widely in ayurvedic and other traditional medicines and has broad pharmacological properties. The study was planned to photoprotective efficacy of PIP in human keratinocyte (HaCaT) cell line. We have assessed the UV-R induced activation of transcription factor NF-κB in coordination with cell death modulators (Bax/Bcl-2 and p21). The LC-MS/MS analysis revealed that PIP was photostable under UV-A/UV-B exposure. PIP (10μg/ml) attenuates the UV-R (A and B) induced phototoxicity of keratinocyte cell line through the restoration of cell viability, inhibition of ROS, and malondialdehyde generation. Further, PIP inhibited UV-R mediated DNA damage, prevented micronuclei formation, and reduced sub-G1 phase in cell cycle, which supported against photogenotoxicity. This study revealed that PIP pretreatment strongly suppressed UV-R induced photodamages. Molecular docking studies suggest that PIP binds at the active site of NF-κB, and thus, preventing its translocation to nucleus. In addition, transcriptional and translational analysis advocate the increased expression of NF-κB and concomitant decrease in IkB-α expression under UV-R exposed cells, favouring the apoptosis via Bax/Bcl-2 and p21 pathways. However, PIP induced expression of IkB-α suppress the NF-κB activity which resulted in suppression of apoptotic marker genes and proteins that involved in photoprotection. Therefore, we suggest the applicability of photostable PIP as photoprotective agent for human use.

KEYWORDS:

NF-κB; Photoprotection; Photostable; Piperine; UV-R

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center