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Naldgetag
12 Apr 2025 - 04:38 am
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12 Apr 2025 - 01:42 am
Exposure to phthalates during pregnancy can affect a newborn’s brain development, study finds
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Phthalates — the synthetic chemicals used in everyday products for food packaging, personal care, toys and more — have been linked to abnormal neurological development in infants.
Now, scientists may have discovered a biological pathway for how this phenomenon could occur. Researchers found that in utero exposure to phthalates is linked with altered metabolism of neurotransmitters and amino acids involved in brain maturation, according to a study published Wednesday in the journal Nature Communications.
The report is the first to use untargeted metabolomics — the study of all small molecules or metabolites in a biological system — to connect a mother’s phthalate exposure to a newborn’s metabolites, and those metabolites to neurological development, said senior study author Dr. Donghai Liang via email.
“This represents an important step forward in understanding how prenatal chemical exposures shape infant development at the molecular level,” added Liang, an associate professor of environmental health at Emory University’s Rollins School of Public Health in Atlanta.
First introduced in the 1920s, phthalates are used to make plastics softer and more flexible, primarily in polyvinyl chloride (PVC) products such as vinyl flooring, medical devices, children’s toys, food packaging or shower curtains. The chemicals also help lubricate substances and carry fragrances in various personal care products including deodorant; nail polish; perfumes; hair gels, sprays or shampoos; soaps; and body lotions.
Phthalates are also endocrine disruptors that have been linked to preterm birth, infant genital abnormalities, childhood obesity, asthma, cancer, cardiovascular issues, and low sperm count and testosterone in men.
“We conducted this study because phthalates are everywhere in our daily lives,” Liang said, hence their nickname “everywhere chemicals.”
Harming infant health
The findings are based on mother-newborn pairs enrolled in the Atlanta African American Maternal-Child Cohort between 2016 and 2018. In urine samples collected from 216 mothers between eight weeks and 14 weeks of gestation at visit one and 145 participants between 24 and 30 weeks’ gestation at visit two, the authors measured eight phthalate metabolites. Participants were around age 24 on average, and their levels of some phthalate metabolites were higher than the average determined by the National Health and Nutrition Examination Survey.
Within a day or two of birth, the authors collected the babies’ blood via a heel stick.
The team found prenatal phthalate levels were associated with lower levels of tyrosine, an amino acid and precursor to the thyroid hormone thyroxine. Thyroxine was also abnormally low in those with in utero phthalate exposure, and low thyroxine has been previously associated with greater vulnerability to illness and neurodevelopmental issues in newborns, the authors said. Tyrosine is also a precursor to the neurotransmitters dopamine, norepinephrine and epinephrine, all of which partly contribute to the body’s fight-or-flight response. Low levels of these neurotransmitters can lead to various problems, including anxiety, depression and trouble focusing.
Prenatal phthalate exposure was also linked with lower levels of the essential amino acid tryptophan, which converts into 5-hydroxytryptophan (or 5-HTP), which then turns into serotonin. Both 5-HTP and serotonin were also low. Serotonin has several critical roles in the body, including mood regulation, sleep, learning, memory, digestion and the body’s response to stress. Previous research has linked low serotonin with mood disorders such as depression and anxiety, sleep problems, and digestive issues.
Albertexorb
12 Apr 2025 - 12:13 am
Americans nearing retirement and recent retirees said they were anxious and frustrated following a second day of market turmoil that hit their 401(k)s after President Donald Trump’s escalation of tariffs.
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As the impending tariffs shook the global economy Friday, people who were planning on their retirement accounts to carry them through their golden years said the economic chaos was hitting too close to home.
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Some said they are pausing big-ticket purchases and reconsidering home renovations, while others said they fear their quality of life will be adversely affected by all the turmoil.
“I’m just kind of stunned, and with so much money in the market, we just sort of have to hope we have enough time to recover,” said Paula, 68, a former occupational health professional in New Jersey who retired three years ago.
Paula, who spoke on the condition of anonymity because she feared retaliation for speaking out against Trump administration policies, said she was worried about what lies ahead.
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“What we’ve been doing is trying to enjoy the time that we have, but you want to be able to make it last,” Paula said Friday. “I have no confidence here.”
Trump fulfilled his campaign promise this week to unleash sweeping tariffs, including on the United States’ largest trading partners, in a move that has sparked fears of a global trade war. The decision sent the stock market spinning. On Friday afternoon, the broad-based S&P 500 closed down 6%, the tech-heavy Nasdaq dropped 5.8%, and the Dow Jones Industrial Average fell more than 2,200 points, or about 5.5%.
Billyfraus
11 Apr 2025 - 08:38 pm
Americans nearing retirement and recent retirees said they were anxious and frustrated following a second day of market turmoil that hit their 401(k)s after President Donald Trump’s escalation of tariffs.
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As the impending tariffs shook the global economy Friday, people who were planning on their retirement accounts to carry them through their golden years said the economic chaos was hitting too close to home.
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Some said they are pausing big-ticket purchases and reconsidering home renovations, while others said they fear their quality of life will be adversely affected by all the turmoil.
“I’m just kind of stunned, and with so much money in the market, we just sort of have to hope we have enough time to recover,” said Paula, 68, a former occupational health professional in New Jersey who retired three years ago.
Paula, who spoke on the condition of anonymity because she feared retaliation for speaking out against Trump administration policies, said she was worried about what lies ahead.
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“What we’ve been doing is trying to enjoy the time that we have, but you want to be able to make it last,” Paula said Friday. “I have no confidence here.”
Trump fulfilled his campaign promise this week to unleash sweeping tariffs, including on the United States’ largest trading partners, in a move that has sparked fears of a global trade war. The decision sent the stock market spinning. On Friday afternoon, the broad-based S&P 500 closed down 6%, the tech-heavy Nasdaq dropped 5.8%, and the Dow Jones Industrial Average fell more than 2,200 points, or about 5.5%.
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11 Apr 2025 - 03:47 pm
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11 Apr 2025 - 03:31 pm
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11 Apr 2025 - 01:35 am
Наскільки сильна релятивістські ефекти гравітації? Чи може вона змінювати час і простір?
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11 Apr 2025 - 01:28 am
Trailer trucks queue to cross into the United States at the Otay Mesa Port of Entry, in Tijuana, Mexico, November 27, 2024. Jorge Duenes/Reuters
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CNN
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Since President Donald Trump won the election in November, businesses across the globe have been bracing for higher tariffs — a key Day One promise the president made.
But over a week into his presidency, Trump has yet to enact any new tariffs.
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That could change, come 11:59 p.m. ET on Saturday — the deadline Trump set for when he says he will slap 25% tariffs on all Mexican and Canadian goods and a 10% tariff on all Chinese goods.
The tariffs, he said, will be imposed as a way of punishing the three nations, which Trump claims are responsible for helping people enter the country illegally and supplying fentanyl consumed in the US.
Speaking to reporters from the Oval Office on Thursday, Trump said he meant business, especially with his tariff threats on Mexico and Canada. White House Press Secretary Karoline Leavitt also confirmed on Friday that Trump will levy the 10% tariff on China on Saturday.
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Should these threats be believed? Yes and no, said Trump’s former Commerce Secretary Wilbur Ross.
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The threat of blanket tariffs is likely being overstated, Ross said in an interview with CNN. “There probably will be exclusions, because there are some goods that just are not made here, will not be made here, and therefore, there’s no particular point putting tariffs on.”
Ross, who was one of a handful of initial cabinet members in Trump’s first administration who kept their position for the entire four-year term, said he advocated for such exclusions when he advised Trump on tariff policies.
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