Tag: seaweed

Categories : Neurodegenerative DiseasesTags : Leave a comment

Antioxidants in Seaweed Could help Prevent Parkinson’s Disease

On By ModernMedia
Photo by Kampus Production on Pexels

Parkinson’s disease is induced by neuronal damage due to excessive production of reactive oxygen species. Suppression of reactive oxygen species generation is essential because it is fatal to dopaminergic neurons that manage dopamine neurotransmitters. Currently, only symptomatic treatment is available, so the development of treatment regimens and prevention methods is necessary.

Fortunately, Associate Professor Akiko Kojima-Yuasa of Osaka Metropolitan University’s Graduate School of Human Life and Ecology led a research group that has verified the physiological effect of Ecklonia cava polyphenols, seaweed antioxidants, on the prevention of Parkinson’s disease.

In this study, published in the journal Nutrients, two types of motor function tests were conducted using Parkinson’s disease model mice that were orally fed the antioxidants daily for one week and then administered rotenone. Results showed that motor function, which was decreased by rotenone, was restored. There was also improvement in intestinal motor function and the colon mucosa structure, a special tissue that covers the colon.

Further, cellular experiments using Parkinson’s disease model cells verified the biochemical interaction of the preventive effect of Ecklonia cava. Validation results showed that the antioxidants activate the AMPK enzyme (adenosine monophosphate-activated protein kinase), an intracellular energy sensor, and inhibit the production of reactive oxygen species that cause neuronal cell death.

“This study suggests that Ecklonia cava antioxidants may reduce neuronal damage by AMPK activation and inhibiting intracellular reactive oxygen species production,” stated Professor Kojima-Yuasa. “It is hoped that Ecklonia cava will be an effective ingredient in the prevention of Parkinson’s disease.”

Source: Osaka Metropolitan University

Categories : OphthalmologyTags :

A New Treatment for Retinal Detachment – Based on Seaweed

On By ModernMedia
Photoreceptor cells in the retina. Credit: Scientific Animations

In Korea, it is taboo to consume seaweed soup before exams since it there is a belief that the slippery nature of seaweed can lead to slipping up in the exam and failing. The slick surface of seaweeds is attributed to alginate, a mucilaginous carbohydrate substance. Now, Korean researchers have made use of this substance in the treatment of retinal detachment.

The result is an artificial vitreous body for treating retinal detachment, based on alginate from seaweed.

The research findings were recently published in Biomaterials, an international journal of biomaterials published by Elsevier. The work was a collaborative effort between Professor Hyung Joon Cha from the Department of Chemical Engineering and the School of Convergence Science and Technology and Dr. Geunho Choi from the Department of Chemical Engineering at Pohang University of Science and Technology (POSTECH), and Professor Woo Jin Jeong, Professor Woo Chan Park, and Professor Seoung Hyun An from the Dong-A University Hospital’s Department of Ophthalmology.

The vitreous body is a gel-like substance that occupies the space between the lens and retina, contributing to the eye’s structural integrity. Retinal detachment occurs when the retina separates from the inner wall of the eye and moves into the vitreous cavity, leading to detachment and potentially resulting in blindness in severe cases.

While a common approach involves removing the vitreous body and substituting it with medical intraocular fillers like expandable gas or silicone oil, these fillers have been associated with various side effects. To address these concerns, the research team employed a modified form of alginate, a natural carbohydrate sourced from algae.

Alginate, also known as alginic acid, is widely utilised in various industries, including food and medicine, for its ability to create viscous products. In this research, the team crafted a medical composite hydrogel based on alginate, offering a potential alternative for vitreous replacement.

The hydrogel has high biocompatibility and optical properties akin to authentic vitreous body, preserving the vision of patients post-surgery. Its distinctive viscoelasticity effectively regulates fluid dynamics within the eye, contributing to retinal stabilisation and the elimination of air bubbles.

To validate the hydrogel’s stability and effectiveness, the team conducted experiments using rabbit eyes, which closely resemble human eyes in structure, size, and physiological response.

Implanting the hydrogel into rabbit eyes demonstrated its success in preventing the recurrence of retinal detachment, maintaining stability, and functioning well over an extended period without any adverse effects.

Professor Hyung Joon Cha of the POSTECH who led the study remarked, “There is a correlation between retinal detachment and severe myopia and the prevalence of retinal detachment is increasing, particularly in young people. The incidence of retinal detachment cases in Korea rose by 50% in 2022 compared to 2017.” He expressed the team’s commitment by saying, “Our team will enhance and progress the technology to make the hydrogel suitable for practical use in real-world eye care through ongoing research.”

Professor Woo Jin Jeong from the Dong-A University Hospital stated, “The worldwide market for intraocular fillers is expanding at a rate of 3% per year.” He added, “We anticipate that the hydrogel we’ve created will prove beneficial in upcoming vitreoretinal surgeries.”

Source: Pohang University of Science & Technology (POSTECH)