Tag Archives: removal

Gene Removal Reverses Alzheimer’s Disease in Mice: Breakthrough Findings from Sciworthy

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Alzheimer’s disease presents significant challenges, transforming a cherished family member into someone who often fails to recognize their true self. Many individuals ponder the reasons behind the erosion of memories and personalities. Researchers have identified the primary driver of Alzheimer’s as the accumulation of a brain protein known as Tau.

Under normal circumstances, tau protein plays a crucial role in preserving the health of nerve cells by stabilizing the microtubules, which function as pathways for nutrient transport. However, in Alzheimer’s patients, tau protein becomes twisted and tangled, obstructing communication between cells. These tau tangles are now recognized by medical professionals as a defining characteristic of Alzheimer’s disease, serving as indicators of cognitive decline.

Recent studies have shown that tau tangles correlate with diminished brain function in individuals affected by Alzheimer’s disease. Additionally, the apolipoprotein E4 (APOE4) gene is closely linked to late-onset Alzheimer’s and may exacerbate tau tangling. This gene encodes a protein involved in transporting fats and cholesterol to nerve cells throughout the brain.

A team from the University of California, San Francisco, and the Gladstone Institute has discovered that eliminating APOE4 from nerve cells can mitigate cognitive issues associated with Alzheimer’s. Their research involved specially bred mice exhibiting tau tangles and various forms of the human APOE gene, specifically APOE4 and APOE3. The aim was to determine if APOE4 directly contributes to Alzheimer’s-related brain damage and if its removal could halt cognitive decline.

To investigate the impact of the APOE4 gene, the researchers introduced a virus containing abnormal tau protein into one side of each mouse’s hippocampus. When the mice reached 10 months of age, the team conducted various tests—including MRI scans, staining of brain regions, microscopy, brain activity assessments, and RNA sequencing—to analyze the accumulation of tau protein in the brains of those with and without the APOE4 gene.

The findings revealed significant discrepancies between the two groups. Mice with the APOE4 gene displayed a higher prevalence of tau tangles, a marked decline in brain function, and increased neuronal death, while those with the APOE3 gene exhibited minimal tau deposits and no cognitive decline.

Next, the researchers employed a protein linked to an enzyme called CRE to excise the APOE4 gene from mouse nerve cells, subsequently measuring tau levels with a specialized dye. The results indicated a significant reduction in tau tangles, dropping from nearly 50% to around 10%. In contrast, mice carrying the APOE3 gene saw an even smaller reduction from just under 10% to approximately 3%.

Additionally, a different dye was utilized to quantify amyloid plaques—another protein cluster frequently found in Alzheimer’s cases. The outcomes showed that, following removal of the APOE4 gene, amyloid plaque levels decreased from roughly 20% to less than 10%. Mice with the APOE3 gene, however, displayed no notable change, consistently maintaining around 10% amyloid plaques.

The researchers further analyzed the RNA of the mice to understand how APOE4 affects neurons and other brain cells. Their observations confirmed that the presence of APOE4 correlated with an uptick in Alzheimer’s-related brain cells. This finding helped illustrate that eliminating APOE4 from nerve cells resulted in diminished responses associated with Alzheimer’s disease.

In conclusion, the researchers determined that APOE4 is detrimental and may actively induce Alzheimer’s-like damage in the brains of mice. While further validation in human subjects is needed, the implications of this gene may pave the way for developing targeted therapies for Alzheimer’s disease.

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Source: sciworthy.com

Magnetic Gel: A More Effective Solution for Kidney Stone Removal

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Kidney stones are a common and painful condition

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Devices utilizing magnets may offer a more efficient method for removing kidney stones compared to traditional techniques, potentially reducing the necessity for repeated surgeries.

Kidney stones form when minerals in urine crystallize. If they become lodged in the kidneys or move into the ureters, the tubes connecting the kidneys to the bladder, they can lead to significant discomfort.

Current treatments often involve breaking the stones into smaller pieces through methods such as guiding a thin tube with a laser through the bladder into the ureters and kidneys, or applying ultrasound waves externally.

Surgeons typically extract these fragments individually using a wire basket that passes in and out of the urethra. This repetitive retrieval process can result in tissue damage. About 40% of the time, residual debris is left behind, particularly if small particles evade the basket, increasing the risk of additional stones.

Seeking alternatives, Joseph Liao and his team at Stanford University in California previously engineered a magnetic gel designed to coat stone debris and a magnetic wire to capture it in lab settings.

Recently, they implemented this method in a study involving four pigs. They introduced various fragments of human kidney stones into the pigs’ kidneys before injecting the magnetic gel. By utilizing a magnetic wire inserted through the urethra, the researchers managed to extract multiple stone fragments simultaneously, unlike the traditional wire basket method that retrieves them one at a time. “It’s like using a stick to fish out a snot filled with stone debris, allowing for the removal of significant amounts of stone fragments at once,” explained Liao.

This technique appears to cause less tissue damage than conventional methods since fewer invasive procedures are necessary. Unlike wire baskets, the magnetic device effectively captures debris of varying sizes, permitting thorough removal of all remnants from the kidney, as noted by Rio. This not only decreases the chance of new stones forming but also curtails the need for additional surgeries.

“This is a very promising method,” states Veronica Magdanz from the University of Waterloo, Canada, who was not involved in the research. “Any advancement that enhances the success rate of stone collection and facilitates the removal of more pieces at once is advantageous.”

None of the pigs exhibited any adverse reactions to the gel. “This is excellent news. It is non-toxic and harmless,” Magdanz remarked. After refining the technique through further pig studies, Rio and his team aim to begin human trials within approximately a year.

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Source: www.newscientist.com

Miami-Dade Mayor Plans to Veto Removal of Fluoride from Drinking Water

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The mayor of Miami-Dade County announced on Friday that she opposes the removal of fluoride from drinking water in Florida’s largest county. This decision goes against a growing movement that aims to eliminate minerals used for preventing tooth decay.

This veto by Mayor Daniela Levine Cava, a Democrat, comes as critics advocate for the addition of fluoride to water supplies. Recently, Utah became the first state to prohibit the addition of fluoride to public water, and other states, including Florida, are contemplating similar actions.

“The science is crystal clear,” Levine Kava stated during a press conference on Friday. She emphasized, “Ending fluoridation could cause real and lasting harm, especially to children and families who cannot afford regular dental care.”

On April 1, the Miami-Dade Commission, a nonpartisan body of county commissioners, passed a measure to ban fluoride, with some commissioners absent. A total of nine votes are needed to override the mayor’s veto if all 13 commissioners are present, and it remains uncertain whether there is enough support for this. The next scheduled board meeting is on May 6th.

The majority of commissioners in Miami-Dade are Republicans, and Kevin Marino Cabrera, a Trump ally, is set to become the ambassador of Panama. Levine Cava is currently the highest elected Democrat in the state, with Republicans having claimed victory in all other county elected offices in Miami-Dade last year, including sheriffs and election supervisors.

During a press conference last Friday, Levine Caba referenced a study to support her decision, standing alongside dentists and doctors wearing white coats.

“I do what I believe is best for the health of my community. I stand with dental and medical professionals,” she affirmed.

Commissioner Roberto J. Gonzalez, the sponsor of the law, criticized Levine Hippo for “behaving like a typical politician, relying on tired partisan narratives to jeopardize public health.” In a statement on Friday, he called on his fellow committee members to override the veto.

Miami-Dade is mandated to cease adding fluoride to its water supply within 30 days. Levine Cava mentioned that she and her office are closely monitoring state-level efforts in the Florida Legislature to pass a similar ban.

Many experts caution against the removal of fluoride from drinking water, especially for oral health and cavity prevention. The Centers for Disease Control and Prevention deem Fluoridation as one of the “10 greatest public health achievements of the 20th century.”

However, concerns about fluoride have gained momentum in recent years, particularly after the COVID-19 pandemic undermined trust in public health interventions. Opponents argue that they aim to safeguard bodily autonomy and raise worries about potential cognitive effects in children.

They reference a Recent Review Papers which analyzed 74 studies and suggested a link between decreased IQ scores in children with high fluoride exposure during childhood or prenatal periods. (The levels studied were double the CDC’s recommended level. One study found no association.)

Levine Cava’s veto contrasts with the stance of fluoride skeptics like the Trump administration’s Kennedy and Republican Gov. Ron DeSantis, along with his appointed surgeon general, Dr. Joseph A. Radapop, who advocates for fluoridated water.

Recently, DeSantis expressed, “Do we want forced medication or do we want people to have a choice? When you’re adding it to water, you’re not really giving people a choice.”

Before the mayor’s announcement, Dr. Radapop called for a halt to Covid vaccine use and urged Miami-Dade residents to petition the mayor to support the fluoride ban. “It’s difficult to comprehend how someone feels entitled to add drugs to the water people drink,” he remarked.

Fluoride was first introduced in city water supplies in 1945 and became a common practice across the country in the ensuing decades. Studies have shown a direct correlation between fluoridation and improved oral hygiene.

“There’s a growing distrust in reliable, evidence-based science,” remarked Dr. Brett Kessler, president of the American Dental Association, in a statement this week. “When government officials, like Secretary Kennedy, perpetuate misinformation and mistrust in research, it harms public health.”

The debate over fluoridated water has raged for years as experts warn against excessive long-term fluoride exposure due to potential health issues. The federally mandated level has decreased over the years, including after a recent court order.

On Monday, Environmental Protection Agency director Lee Zeldin announced the decision to “expeditiously review new scientific information on the potential health risks of fluoride in drinking water.”

“If this evaluation is conducted without bias, it will provide a modern and comprehensive scientific assessment,” stated Zeldin. He lauded Kennedy’s longstanding involvement in this issue. Most individuals who spoke during the public comments section at the April Miami-Dade Committee meeting opposed fluoridation. A few days post-meeting, Levine Hippo hosted a Roundtable Discussion, focusing on the benefits with community healthcare professionals.

Since the November election, Florida’s 20 other cities and county governments have voted to eliminate fluoride from their water supplies. Miami-Dade County, with a population of around 2.7 million, is significantly larger. There are ongoing discussions in the Florida Legislature regarding a bill that would prevent local municipalities from adding fluoride to water.

Miami-Dade politics have shifted markedly to the right in recent years, mirroring Florida’s political landscape from a battleground state to one that is increasingly leaning Republican. In November, Trump became the first Republican presidential candidate to win the county since 1988.

Patricia Matsuzei Contribution report

Source: www.nytimes.com

X takes legal action against Modi government for censorship in New India’s content removal battle

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India’s IT Ministry has unlawfully extended its censorship authority to facilitate the removal of online content and allow “countless” government officials to enforce such orders.

The lawsuit and accusations indicate the escalation of the ongoing legal dispute between X, who is being instructed by New Delhi to take down content, and Indian Prime Minister Narendra Modi. This comes as Musk prepares to launch Starlink and Tesla in India.

In a recent court filing dated March 5, X argues that India’s IT ministry is utilizing a government website launched by the Home Office last year to issue content blocking orders and compel social media companies to participate on the website. According to X, the process lacks stringent Indian legal safeguards concerning content removal, requiring the issuance of an order in cases of sovereignty or public order harm and involving strict monitoring by top officials.


India’s IT Ministry redirected a request for comment to the Home Office, but did not respond.

The government’s website stated it was attempting to counter the directive by establishing an “unacceptable parallel mechanism” that would lead to “unchecked censorship of Indian information.”

X’s court documents have not been publicly released and were initially reported by the media on Thursday. The case was briefly heard earlier this week by a judge from the Southern High Court of Karnataka, but a final decision was not reached. The next hearing is scheduled for March 27th.

In 2021, X, previously known as Twitter, faced a dispute with the Indian government over defying a legal order to block certain tweets related to farmers’ protests against government policies. X eventually complied after facing backlash from the public, but the legal challenge remains ongoing in Indian courts.

Source: www.theguardian.com

The brain’s waste removal process disrupted by sleeping pills

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During sleep, your brain eliminates toxins that have accumulated throughout the day.

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Sleeping pills may help you doze off, but the sleep you get may not be as restorative. When mice were given zolpidem, which is commonly found in sleeping pills such as Ambien, their brains were unable to effectively remove waste products during sleep.

Sleep is important for removing waste from the brain. At night, a clear fluid called cerebrospinal fluid circulates around brain tissue and flushes out toxins through a series of thin tubes known as the glymphatic system. Think of it like a dishwasher, which turns on your brain while you sleep, says Miken Nedergaard at the University of Rochester Medical Center in New York. However, the mechanisms that push fluid through this network have not been well understood.

Nedergaard and his colleagues implanted optical fibers into the brains of seven mice. By irradiating chemicals in the brain, the fibers can track the flow of blood and cerebrospinal fluid during sleep.

They found that elevated levels of a molecule called norepinephrine cause blood vessels in the brain to constrict, reducing blood volume and allowing cerebrospinal fluid to flow into the brain. As norepinephrine levels decrease, blood vessels dilate and cerebrospinal fluid is pushed back. Thus, fluctuations in norepinephrine during non-rapid eye movement (NREM) sleep stimulate blood vessels to act like pumps in the glymphatic system, Nedergaard said.

This discovery reveals that norepinephrine plays an important role in clearing waste from the brain. Previous research has shown that when we sleep, the brain releases norepinephrine in a slow, oscillating pattern. These norepinephrine waves occur during NREM, a sleep stage important for memory, learning, and other cognitive functions.

Next, the researchers treated six mice with zolpidem, a sleeping pill commonly sold under the brand names Ambien and Zolpimist. The mice fell asleep faster than those treated with a placebo, but the flow of cerebrospinal fluid in the brain was reduced by about 30 percent on average. In other words, “their brains aren't being cleaned very well,” Nedergaard said.

Although zolpidem was tested in this experiment, almost all sleeping pills inhibit the production of norepinephrine. This suggests that they may interfere with the brain's ability to eliminate toxins.

It is too early to tell whether these results apply to humans. “Human sleep architecture is still quite different from mice, but they have the same brain circuits studied here,” he says. laura lewis at Massachusetts Institute of Technology. “Some of these basic mechanisms may apply to us as well.”

If sleeping pills interfere with the brain's ability to eliminate toxins during sleep, Nedergaard says, that means new sleeping pills must be developed. Otherwise, your sleep problems may worsen and your brain health may deteriorate in the process.

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Source: www.newscientist.com

After the removal of dams, salmon are expected to have unrestricted access to the Klamath River.

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Salmon will soon be able to migrate freely up the Klamath River and its tributaries, marking a significant milestone in the watershed near the California-Oregon border. The largest dam removal project in American history is reaching completion.

This week, excavators will destroy rock dams that have been obstructing water flow upstream on two rivers. Two embankments, Iron Gate and Copco No. 1, which were almost completely removed, will now allow the river to flow freely through its historic channel, providing salmon access to vital habitat just in time for the fall king salmon season.

A Yurok tribal member leads a redwood canoe tour on the lower Klamath River in Klamath, California, on June 8, 2021. As salmon in the Klamath River decline, the Yurok Tribe is turning to alternative sources of revenue, such as ecotourism and canoe tours, to support the tribe.
Nathan Howard/AP File

“Seeing the river return to its original course and the dams removed bodes well for our future,” said Leaf Hillman, a ceremonial leader for the Karuk people who have been advocating for Klamath dam removal for over 25 years. This is crucial for the tribe and others in the region.

The demolition precedes the anticipated completion of the removal of four massive dams on the Klamath River by about a month. This is part of a national movement to restore rivers to their natural state and revive ecosystems for fish and wildlife.

Since February, over 2,000 dams have been removed in the United States, with many removed in the past 25 years, according to the environmental group American Rivers, including dams on the Elwha River in Washington state and Condit Dam on the White Salmon River, a tributary of the Columbia River.

“Now is when the healing process truly begins for the river,” said Joshua Chenoweth, a senior ecologist with the Yurok Tribe, who has long advocated for dam removal and river restoration. “Removing the dams allows the river to naturally restore itself.”

The Klamath River, once a prominent salmon-producing region, saw a drastic decline in fish populations due to dams built by PacifiCorp between 1918 and 1962. These dams disrupted the river’s natural flow and impacted the salmon’s life cycle.

Efforts to remove the dams intensified after a bacterial outbreak in 2002 killed thousands of fish, mainly Chinook salmon, prompting tribes and environmental groups to push for action. The dam removal plan was approved in 2022.

Following the removal of the smallest dam, Copko 2, workers drained the reservoirs of the other three dams and began dismantling their structures in March.

Gilbert Myers measures water temperature in a king salmon trap in the lower Klamath River, California, on June 8, 2021.
Nathan Howard/AP File

Removing the dams on the Klamath River will not significantly impact electricity supply, as the dams produce less than 2 percent of PacificCorp’s energy capacity, enough for around 70,000 homes. While hydroelectric power is considered clean and renewable, environmental groups and tribes have targeted large dams in the Western U.S. due to their negative impact on fish and river ecosystems.

The project’s cost of approximately $500 million will be covered by taxpayers and Pacific Command funds.

The timeline for the salmon’s return and the river’s recovery remains uncertain. There have been reports of salmon at the river’s mouth beginning to migrate. Michael Belchik, a senior water policy analyst for the Yurok Tribe, anticipates the salmon passing through Iron Gate Dam soon.

“We can expect to see early signs of recovery,” he said. “I believe we’ll witness fish swimming over the dam, possibly this year or certainly by next year.”

There are two small upstream dams on the Klamath River that allow salmon to pass through fish ladders, enabling them to overcome the dam barriers.

Mark Brantham, CEO of the Klamath River Restoration Authority overseeing the project, pointed out that it took roughly a decade for the Lower Elwha Klallam tribe to resume fishing after the Elwha River dam removal.

“The impacts on fish recovery are uncertain,” he stated. “It will take time to undo the damage and restore the river system after a century of impact.”

Source: www.nbcnews.com

Making plants blue through gene editing could simplify weed removal by robots

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Changing the color of crops may make it easier to distinguish between target plants and weeds

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Common crops such as wheat and corn could be genetically modified to be brightly colored to make them easier for weeding robots to work with, researchers have suggested.

Weeding reduces the need for herbicides, but the artificial intelligence models that power weeding robots can have trouble distinguishing weeds from crops that are similar in shape and color.

To avoid this problem, Pedro Correia Researchers from the University of Copenhagen in Denmark and their colleagues have suggested that crop genomes could be adapted to express pigments such as anthocyanins, which make blueberries blue, and carotenoids, which make carrots orange.

It is also possible to grow crops with unusually shaped leaves or other traits that are invisible to the naked eye but can be detected by sensors such as those in the infrared spectrum.

Correia said AI's weeding struggles could get worse as wild species adapt to agriculture, taking advantage of their ability to cope with changing climate. This type of new domestication can produce crops that are more environmentally sustainable and higher yielding, but can also be difficult to distinguish from their unchanged ancestors.

“We're trying to change a very small number of genes to increase productivity,” Correia says. “It would be great if he could change one or two more genes to make them more recognizable and to be able to use robots to weed.”

charles fox The University of Lincoln in the UK says there is precedent for intentionally changing the color of crops. Orange carrots were not common until producers selectively bred stable varieties. But he thinks genetic modification is probably not the easiest way to improve the effectiveness of weed-killing robots.

“Other methods would probably be much easier and less controversial because people generally don't like genetic modification,” Fox says. “Sounds like a lot of effort.”

Correia says he's not suggesting creating something new or adding animal genes. The research involves modifying crop genomes to incorporate genes for pigments already produced in other plants. “We're just making some changes to the crop so they can eat it too,” he says. “We'll have to test everything and test for side effects and things like that, but I think it's quite possible.”

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Source: www.newscientist.com

Google Ceases Notification of Publishers Regarding Removal of ‘Right to be Forgotten’ from Search Results

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Google will inform publishers quietly that it has removed websites from search results under Europe’s “right to be forgotten” rules, following a Swedish court ruling that the search engine applies globally. Stopped.

Previously, when an individual requested that records about them be deleted under EU data protection law, Google would notify the publisher of the original article.

Media companies, including the Guardian, are largely exempt from regulation, but links to journalistic content can be removed from databases such as search engines.

Currently, Google only notifies publishers that a URL has been removed, without providing details about what or why.

As a result, journalists are unable to identify situations in which the right to be forgotten is being misused to obscure legitimate reporting about serial offenders, hampering their ability to challenge the most serious rights violations.

A Google spokesperson said: “We have introduced a new approach to notifications following a decision by the Swedish Data Protection Authority. It came into force.”

“Although we did not agree with this decision at the time, it is binding and supports EU-wide regulatory guidance. We have therefore made strong efforts to comply with it. Ta.”

One of the changes introduced by the GDPR in 2016 was to ensure that EU national court decisions on data protection set precedent across the bloc.

A Swedish court ruled in December that notifying webmasters that search engines have removed links to their content is itself a violation of the privacy of people who have requested the right to be forgotten.

“Thus, the Administrative Court found that once Google granted the deletion of search results, the interests of individuals in privacy and effective protection of personal data generally outweighed Google’s interests. [sic] Send a message to the webmaster, concludes. according to International Association of Privacy Professionals.

Upheld a 50 million Swedish kronor (£3.8 million) fine against search engines for failing to remove URLs they were asked to remove from their lists.

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Within weeks of the first judgment in May 2014, which ruled that the right to be forgotten applied to Google, six Guardian articles were removed from the European version of the search engine.

Three of the charges related to now-retired Scottish Premier League referee Dougie McDonald, who was found to have lied about his reasons for awarding penalties in a football match in 2010. . Others included his 2002 article about a lawyer facing a fraud trial and his 2011 article about a French office worker who makes his art Post-It Notes.

Over the next five years, the search engine received about 1 million unique forgotten requests, and even though more than half were rejected, it still removed about 1.5 million unique URLs.

Source: www.theguardian.com