International
Treatment improves cognition in Down Syndrome patients
AFP
A new hormone treatment improved the cognitive function of six men with Down Syndrome by 10-30 percent, scientists said Thursday, adding the “promising” results may raise hopes of improving patients’ quality of life.
However the scientists emphasised the small study did not point towards a cure for the cognitive disorders of people with Down Syndrome and that far more research is needed.
“The experiment is very satisfactory, even if we remain cautious,” said Nelly Pitteloud of Switzerland’s Lausanne University Hospital and co-author of a new study in the journal Science.
Down Syndrome is the most common genetic form of intellectual disability, occurring in around one in 1,000 people, according to the World Health Organization.
Yet previous research has failed to significantly improve cognition when applied to people with the condition, which is why the latest findings are “particularly important”, the study said.
Recent discoveries have suggested that how the gonadotropin-releasing hormone (GnRH) is produced in the brain can affect cognitive functioning such as memory, language and learning.
GnRH hormones regulate how much testosterone and estrogen is produced and increased levels of it help spur puberty.
“We wondered if this hormone could play any role in establishing the symptoms of people with Down Syndrome,” said Vincent Prevot, study co-author and head of neuroscience research at France’s INSERM institute.
– Mice research –
The team first established that five strands of microRNA regulating the production of GnRH were dysfunctional in mice specifically engineered for Down Syndrome research.
They then demonstrated that cognitive deficiencies — as well as loss of smell, a common symptom of Down Syndrome — were linked to dysfunctioning GnRH secretion in the mice.
The team then gave the mice a GnRH medication used to treat low testosterone and delayed puberty in humans, finding that it restored some cognitive function and sense of smell.
A pilot study was conducted in Switzerland involving seven men with Down Syndrome aged 20 to 50.
They each received the treatment through their arm every two hours over a period of six months, with the drug delivered in pulses to mimic the hormone’s frequency in people without Down Syndrome.
Cognition and smell tests were carried out during the treatment, as were MRI scans.
Six of the seven men showed improvement in cognition with no significant side effects — however none showed a change in their sense of smell.
“We have seen an improvement of between 10-30 percent in cognitive functions, in particular with visuospatial function, three-dimensional representation, understanding of instructions as well as attention,” Pitteloud said.
The patients were asked to draw a simple 3D bed at several stages throughout the therapy. Many struggled at the beginning but by the end the efforts were noticeably better.
– ‘Improve quality of life’ –
The authors acknowledged some limitations of the study, including its size and that the choice of patients was “pushed by their parents”.
“The clinical trial only focused on seven male patients — we still have a lot of work to do to prove the effectiveness of GnRH treatment for Down Syndrome,” Pitteloud said.
A larger study involving a placebo and 50 to 60 patients, a third of them women, is expected to begin in the coming months.
“We are not going to cure the cognitive disorders of people with Down Syndrome, but the improvement seen in our results already seems fundamental enough to hope to improve their quality of life,” Pitteloud said.
Fabian Fernandez, an expert in cognition and Down Syndrome at the University of Arizona who was not involved in the research, hailed the “tour de force study”.
He told AFP that while it is “difficult to envision” how such an intensive treatment could be used for young people, it might be better suited to delay the Alzheimer’s disease-related dementia suffered by many adults with Down Syndrome.
It was also difficult to predict how such an improvement could impact the lives of people with the condition, he said.
“For some, it could be significant, however, as it would enable them to be more independent with daily living activities such as maintaining and enjoying hobbies, finding belongings, using appliances in the home, and travelling alone.”
International
Kristi Noem credits Trump for mass migrant deportations by mexican president
U.S. Secretary of Homeland Security Kristi Noem claimed that Mexican President Claudia Sheinbaum has deported “more than half a million” migrants due to pressure from former President Donald Trump.
During a cabinet meeting highlighting the “achievements” of Trump’s administration in its first 100 days, Noem asserted that under the Republican leader’s influence, “Mexico has finally come to the table” to negotiate on migration and fentanyl trafficking.
“The president of Mexico told me she has returned just over half a million people before they reached our border,” Noem stated, criticizing media reports that suggest the Biden administration deported more migrants than Trump’s.
“I wish those deportations were counted,” Noem added, “because those people never made it to our border—she sent them back because you made her.” She went on to thank Trump: “They never made it here because they got the message—because you were so aggressive.”
Noem has made controversial claims about Sheinbaum in the past, prompting the Mexican leader to refute them.
On April 1, Sheinbaum responded to one such statement by declaring, “The president answers to only one authority, and that is the people of Mexico,” after Noem said on Fox News that she gave Sheinbaum “a list of things Trump would like to see” and that Mexico’s actions would determine whether Trump granted tariff relief.
International
Vatican releases special “Sede Vacante” stamps ahead of papal transition
he Vatican’s post offices and select collector shops began selling special edition stamps this week to mark the period between the death of Pope Francis and the election of his successor.
Known as “Sede Vacante” stamps, they feature an image used on official Vatican documents during the interregnum between popes — two crossed keys without the papal tiara. These stamps went on sale Monday and will remain valid for postal use only until the new pontiff appears at the window overlooking St. Peter’s Square.
Until then, they can be used to send letters, postcards, and parcels. “Once the new pope is elected, the stamps lose their postal validity, but their collectible value rises,” said Francesco Santarossa, who runs a collectors’ shop across from St. Peter’s Square.
The Vatican has issued the stamps in four denominations: €1.25, €1.30, €2.45, and €3.20. Each is inscribed with “Città del Vaticano” and “Sede Vacante MMXXV” — Latin for “Vacant See 2025.”
International
Conclave to choose pope Francis’ successor could begin in early may
The conclave, which in the coming weeks must choose the successor to Pope Francis, will strictly follow a precise protocol refined over centuries.
The 135 cardinal electors, all under the age of 80, will cast their votes four times a day — except on the first day — until one candidate secures a two-thirds majority. The result will be announced to the world through the burning of the ballots with a chemical that produces the eagerly awaited white smoke, accompanied by the traditional cry of “Habemus Papam.”
The start date for the conclave could be announced today, as the cardinals are set to hold their fifth meeting since the pope’s passing. Luxembourg Cardinal Jean-Claude Hollerich suggested it could begin on May 5 or 6, following the traditional nine days of mourning. According to German Cardinal Reinhard Marx, the conclave could last only “a few days.”
Although the late Argentine pontiff appointed the majority of the cardinal electors, this does not necessarily ensure the selection of a like-minded successor. Francis’ leadership style differed significantly from that of his predecessor, Benedict XVI, a German theologian who was less fond of large public gatherings. It also marked a contrast with the popular Polish pope, John Paul II.
The Argentine Jesuit’s reformist papacy drew strong criticism from more conservative sectors of the Church, who are hoping for a doctrinally focused shift. His tenure was marked by efforts to combat clerical sexual abuse, elevate the role of women and laypeople, and advocate for the poor and migrants, among other causes.
Kristi Noem credits Trump for mass migrant deportations by mexican president
Vatican releases special “Sede Vacante” stamps ahead of papal transition
Conclave to choose pope Francis’ successor could begin in early may
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