Study finds how long Covid causes smell loss for months, even years
Washington (PTI): Scientists have uncovered details about the reason behind loss of smell continuing as part of long Covid symptoms, according to a new study.
The reason some people fail to recover their sense of smell after COVID-19 is linked to an ongoing immune assault on olfactory nerve cells and an associated decline in the number of those cells, a team of scientists from Duke University, US, report.
Olfactory nerve cells are associated with our ability to distinguish scents and smells.
The findings, published in the journal Science Translational Medicine, provide an important insight into a vexing problem that has plagued millions who have not fully recovered their sense of smell after COVID-19, the study said.
While focusing on the loss smell, the findings also shed light on the possible underlying causes of other long COVID-19 symptoms - including generalized fatigue, shortness of breath, and brain fog - that might be triggered by similar biological mechanisms.
"One of the first symptoms that has typically been associated with COVID-19 infection is loss of smell," said senior author Bradley Goldstein, Duke University.
"Fortunately, many people who have an altered sense of smell during the acute phase of viral infection will recover smell within the next one to two weeks, but some do not," said Goldstein.
"We need to better understand why this subset of people will go on to have persistent smell loss for months to years after being infected with SARS-CoV-2," said Goldstein.
In the study, Goldstein and colleagues at Duke, Harvard and the University of California-San Diego analyzed olfactory epithelial samples collected from 24 biopsies, including nine patients suffering from long-term smell loss following COVID-19.
This biopsy-based approach revealed widespread infiltration of T-cells engaged in an inflammatory response in the olfactory epithelium, the tissue in the nose where smell nerve cells are located. This unique inflammation process persisted despite the absence of detectable SARS-CoV-2 levels, the study said.
Additionally, the number of olfactory sensory neurons were diminished, possibly due to damage of the delicate tissue from the ongoing inflammation, the study said.
"The findings are striking," said Goldstein. "It's almost resembling a sort of autoimmune-like process in the nose."
Goldstein said learning what sites are damaged and what cell types are involved is a key step toward beginning to design treatments. He said the researchers were encouraged that neurons appeared to maintain some ability to repair even after the long-term immune onslaught.
"We are hopeful that modulating the abnormal immune response or repair processes within the nose of these patients could help to at least partially restore a sense of smell," said Goldstein, noting that this work was currently underway in his lab.
He said the findings from this study could also inform additional research into other long-COVID-19 symptoms that might be undergoing similar inflammatory processes.
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Shah Rukh Khan, Kajol unveil ‘DDLJ’ sculpture at London’s Leicester Square
London (PTI): Bollywood stars Shah Rukh Khan and Kajol huddled under an umbrella on a rainy Thursday in London to unveil their bronze likeness from an iconic ‘Dilwale Dulhania Le Jayenge’ scene.
The sculpture of the duo joins Leicester Square’s ‘Scenes in the Square’ trail depicting memorable shots from some of the world’s most famous films, with ‘DDLJ’ marking a Bollywood first and the 30th anniversary of the 1995 box-office hit. It is in this popular London square that SRK as Raj and Kajol as Simran first cross paths unknowingly.
“DDLJ was made with a pure heart. We wanted to tell a story about love, how it can bridge barriers and how the world would be a better place if it had a lot of love in it, and I think this is why 'DDLJ' has had a lasting impact for over 30 years now," said Khan.
“Personally, 'DDLJ' is part of my identity, and it is humbling to see film, and Kajol and me, receiving so much love since it was released,” he said.
He expressed his gratitude to the Heart of London Business Alliance, behind the cinematic trail at Leicester Square, for celebrating ‘DDLJ’ and “immortalising” its lead stars.
“Seeing ‘DDLJ’ become the first Indian film to be honoured in the iconic Scenes in the Square trail is an emotional moment and has brought back so many memories.
"I feel immense pride knowing the film has been embraced around the world, and I want to share this moment with the entire cast and crew of ‘DDLJ’, my friend and director Aditya Chopra and the Yash Raj Films family. This is a moment I will never forget,” added Khan.
Kajol, joined by her daughter Nysa and son Yug, posed with Khan in front of the statue as she braved the rain in a green saree.
“It’s incredible to see ‘Dilwale Dulhania Le Jayenge’ continue to receive so much love, even 30 years later. Watching the statue being unveiled in London felt like reliving a piece of our history - a story that has truly travelled across generations,” said Kajol.
“Seeing it find its rightful place in Leicester Square, a location of such enormous significance to ‘DDLJ’, makes this moment even more special. For the film to be honoured in this way in the UK – the first Indian film to receive such recognition – is something that will forever stay in the hearts and minds of all the ‘DDLJ’ fans across the world,” she said.
Their statue, captured in a dancing pose from the hit song ‘Mehndi Laga Ke Rakhna’, joins the likes of Harry Potter, Bridget Jones, Mary Poppins, and Batman in what is dubbed as an ever-growing celebration of movie magic in a square packed with multiplex cinema screens.
“When ‘Dilwale Dulhania Le Jayenge’, DDLJ, was released 30 years ago, the film became a defining moment for Indian cinema and changed the face of the industry, capturing the hearts of everyone who saw it all over the globe," said Akshaye Widhani, CEO of Yash Raj Films.
“We’re thrilled to be the first Indian film to be represented in ‘Scenes in the Square’. It also marks 30 years of DDLJ, a film that has spread love and joy globally, and shows the cultural impact it has had in UK.
“We are honoured that our superstars and our film are being recognised on the world stage alongside the Hollywood elite, from Gene Kelly to Laurel & Hardy to Harry Potter. This statue will be a great way to express the international appeal of Indian movies and build bridges amongst communities through cinema,” he said.
Since its release in 1995, ‘DDLJ’ has become the longest-running film in Hindi cinema history.
Ros Morgan, Chief Executive at Heart of London Business Alliance, said: “We’re proud to welcome global megastars Shah Rukh Khan and Kajol to our Scenes in the Square trail.
"Dilwale Dulhania Le Jayenge is a cinematic phenomenon that has shaped generations, and London’s first tribute to Indian cinema honours a story whose magic continues to captivate audiences worldwide.”
It is a particularly special year for the film, with a musical based on the romance playing to packed houses at Manchester’s Opera House earlier this year. Aditya Chopra reprised his role as director of the English language stage production, ‘Come Fall In Love – The DDLJ Musical’, which revolved around the love story of Simran and Roger.
The script was a nod to the original as it followed Simran as a young British Indian woman who finds herself engaged to a family friend in India in an arranged marriage. However, the plot thickens when she falls in love with a British man named Roger.
