Biology Current Affairs - 2019
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Scientists from Newcastle University, UK have created world’s first 3D printed human corneas (3D printed thin protective film over eye) that could solve problem of shortage of available eye donors and help millions of blind people gain sight again.
Cornea is outermost layer of the human eye. Its key function is to focus vision. It also barricades eyes against harmful dirt and bacteria. Damage to cornea from injury or infection can distort vision or even lead to blindness.
The 3D printed human corneas were produced using bio-ink solution consisting of healthy corneal stem mixed together with alginate and collagen. The combination of alginate (a gel derived from seaweed) and collagen helps to keep corneal stem cells alive and produces material of necessary dimensions which is stiff enough to hold its shape and soft enough to be squeezed out nozzle of 3D printer.
The World Liver Day (WLD) is observed every year on April 19 to build awareness and understanding importance of liver in human body and how liver ailments can be treated. The 2018 theme for WLD is ‘Riding New Waves in Liver Diagnosis, Staging & Treatment’. As per World Health Organisation (WHO), liver diseases are 10th most common cause of death in India.
Liver is unique organ in human body and has special capacity of regeneration. It is the second largest organ and is key player in our body’s digestive system. Everything we consume passes through the liver. It fights infections, removes toxins, controls cholesterol, regulates blood sugar, make proteins and releases bile to help digestion. It has been seen that even 75% of liver can be safely removed without any untoward consequences because of its capacity of regeneration. Hence, to take care of the liver, one needs to adopt a healthy lifestyle and have a balanced diet of proteins, grains, dairy products, fruits, vegetables, and fats.