Beneficial Properties of Microalgae Pigments

Carotenoids and Their Impact on Human Health

Microalgae, particularly Tetraselmis suecica, contain high concentrations of carotenoids, which are known for their positive effects on human cells. A recent study highlighted the antioxidative and reparative properties of an extract derived from this microalga when tested on a human lung cancer cell line.

The Role of Reactive Oxygen Species (ROS)

Reactive oxygen species (ROS) are naturally occurring molecules that play a crucial role in cellular signaling and homeostasis. However, external factors, such as ionizing radiation, can elevate ROS levels to harmful degrees. Elevated ROS can interact with DNA, RNA, and proteins, leading to cellular damage and oxidative stress. Although the body has mechanisms to neutralize ROS, excessive levels may necessitate supplementation to prevent oxidative damage.

The Importance of Antioxidants

Antioxidants are essential for neutralizing ROS and mitigating their adverse effects. Natural sources of antioxidants, such as microalgae, are often preferred over synthetic alternatives due to concerns regarding long-term toxicity. While the benefits of antioxidants are well-documented, the specific mechanisms behind their protective effects remain unclear.

Research on Tetraselmis suecica

Study Overview and Methodology

A study published in *Scientific Reports* by Sansone et al. investigated the protective capabilities of Tetraselmis suecica at a molecular level. While the extract has been patented for dermatological applications and promoting hair growth, this research focused on its effects in isolated human anaplastic cells. These cells, which lack structural differentiation and are highly prone to malignancy, were exposed to hydrogen peroxide to induce oxidative stress before being treated with the T. suecica extract.

Findings on Cell Repair and Antioxidative Properties

Previous research has indicated that T. suecica is effective in treating psoriasis and enhancing hair growth. The current study demonstrated that the extract also promotes cell repair. The extract was found to be rich in xanthophylls, compounds recognized for their antioxidative properties. In an ROS assay, the extract achieved a remarkable 98% reduction of ROS, outperforming other common antioxidants.

Cellular Responses to Oxidative Stress

When applied to human cells subjected to oxidative stress, the T. suecica extract induced signs of cell repair, including the upregulation of repair markers and the downregulation of damage markers. Researchers suggest that these reparative effects may stem from the synergistic action of multiple antioxidative compounds present in the extract. Further studies are needed to determine whether the bioactivity results from a single compound or a combination of several.

Future Implications

The promising properties of Tetraselmis suecica could pave the way for the development of natural cosmetic and nutritional products aimed at reducing harmful ROS levels in humans.

Written By: Wesley Tin, BMSc