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High tyrosine levels linked to shorter lifespan in men

A new study found that high tyrosine levels are associated with a shorter lifespan in men, while phenylalanine showed no such link. The researchers suggest that dietary adjustments, such as protein restriction, could help reduce tyrosine levels and support healthier aging.

SourceImpact Journals LLC·JournalAging-US·TypeNews article·DateNov 13, 2025

The American College of Medical Genetics and Genomics (ACMG) releases highly anticipated evidence-based clinical guideline for phenylalanine hydroxylase deficiency

The American College of Medical Genetics and Genomics has published a new evidence-based clinical guideline for phenylalanine hydroxylase deficiency diagnosis and management. The guideline provides recommendations for treatment, implementation considerations, research priorities, and economic considerations to improve patient outcomes.

SourceAmerican College of Medical Genetics and Genomics·JournalGenetics in Medicine·TypeSystematic review·DateDec 4, 2024
AmScope B120C-5M Compound Microscope

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Russian scientists improved the way of treatment of phenylketonuria

Researchers develop stable capsule shell for L-phenylalanine ammonium-liasis (PAL) enzyme, improving its effectiveness and stability in the body. The treatment has potential applications beyond phenylketonuria, including other amino acid metabolism disorders.

SourceImmanuel Kant Baltic Federal University·JournalPharmaceutics·DateMay 21, 2020
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High protein diets point to new anti-obesity treatments

A new study found that phenylalanine reduces food intake by affecting the gut and brain, suggesting it may be used to treat or prevent obesity. The amino acid suppressed appetite by releasing hormones in the gut and activating areas of the brain involved in appetite regulation.

SourceSociety for Endocrinology·DateNov 6, 2017

Scientists capture the elusive structure of essential digestive enzyme

Researchers at Princeton University have revealed new insights into the mechanism of phenylalanine hydroxylase, a critical liver enzyme for human health. By applying unique approaches combining small-angle x-ray scattering and chromatography, they provided evidence for a model of the active structure of the enzyme.

SourcePrinceton University·JournalJournal of the American Chemical Society·DateMay 25, 2016
SAMSUNG T9 Portable SSD 2TB

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Scientists offer new insight on rare genetic condition

Researchers used MRI to study the effects of PKU on gray matter in the brain. They found evidence of abnormalities in individuals with early-treated PKU, particularly in posterior regions. The study's findings highlight the importance of maintaining dietary treatment throughout life to prevent irreversible damage.

SourceUniversity of Missouri-Columbia·JournalMolecular Genetics and Metabolism·DateMar 22, 2016

Fundamental plant chemicals trace back to bacteria

Researchers have identified two groups of ancient bacteria as the source of a critical amino acid pathway used by plants to create essential compounds. This breakthrough sheds light on the complex evolution of plant chemical pathways and may lead to increased production of valuable nutrients and medicinal compounds.

SourceUniversity of Wisconsin-Madison·JournalThe Plant Cell·DateAug 7, 2014
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Computer simulations reveal the energy landscape of ion channels

Researchers used computer simulations to investigate the energy landscape of ion channels, identifying a critical amino acid that regulates their function. The study provides new insights into ion channel mechanisms, which are essential for developing targeted therapies.

SourceUniversity of Vienna·JournalPLOS Computational Biology·DateMay 3, 2013

Gene find could lead to healthier food, better biofuel production

Researchers at Purdue University have identified the last undiscovered gene responsible for producing phenylalanine, a crucial amino acid in plant proteins and flower scent. This discovery could enable the control of phenylalanine production to boost plant nutritional values and improve biofuel feedstocks.

SourcePurdue University·JournalNature Chemical Biology·DateNov 22, 2010
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UW-Madison study reveals new options for people with PKU

Researchers at UW-Madison have found a safe and acceptable protein option for people with phenylketonuria (PKU), allowing them to liberalize their diet. The GMP protein derived from whey has been shown to improve protein metabolism and lower blood phenylalanine levels.

SourceUniversity of Wisconsin-Madison·JournalAmerican Journal of Clinical Nutrition·DateMar 30, 2009

Researchers discover natural herbicide released by grass

Cornell researchers identified a natural amino acid called meta-tyrosine in fescue lawn grass that inhibits weed growth and suppresses plant development. The discovery may lead to the development of new varieties of fescue grasses with improved weed-suppressing properties.

SourceCornell University·JournalProceedings of the National Academy of Sciences·DateNov 8, 2007

Mental retardation cause may include cell miscommunication

UF researchers discovered that high levels of phenylalanine in the brains of mice with PKU interfere with brain cell communication, leading to potential developmental delays and disorders. The findings may lead to new treatments for PKU and other neurological disorders.

SourceUniversity of Florida·JournalBrain·DateApr 12, 2005

Poor adherence to control measures for older children with phenylketonuria

A study of younger and older children with phenylketonuria (PKU) reveals significantly poorer adherence to recommended dietary controls in older children, affecting blood phenylalanine levels. Biochemical control can be challenging even in young patients, emphasizing the need for improved treatment options.

SourceThe Lancet_DELETED·JournalThe Lancet·DateJul 4, 2002
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