Science Centres: Fisheries

Our biotechnology team continues to make good progress with identifying biologically active compounds from seafood processing byproduct and bycatch. We have recently tested a range of extracts for their UV-protectant properties, using a cell-based UV stress assay that simulates the response of living cells to solar radiation.

Existing sunscreens rely on filtering the sun and can cause allergies. ‘We believe there is a market for sun protectors derived from natural products that can penetrate the skin and protect it at a biological level,’ says Dr Anna Kilimnik, who is leading the research.

Our assay identified ten extracts that offer protection against either UVB or UVA radiation. The active fractions of these extracts have been selected for further purification and to identify the chemical structure of the compounds with the UV-protectant activity.

Preliminary tests showed that several extracts had dual action, working as a screen on the cell surface and also ensuring biological protection via penetration into the cells. We are now testing the stability of fish extracts and investigating possible protective mechanisms at the cellular level.

This work forms part of the FRST-funded Nutraceuticals from Seafood Programme, a partnership between NIWA and Ngai Tahu Seafood. Dr Kilimnik presented the UV work at an international UV workshop in Dunedin last month.