Cientistas descobrem circuito intestino-cérebro que desencadeia desejo por proteínas

28 de maio de 2026

Reportado por IA

Pesquisadores identificaram uma rede de sinalização anteriormente desconhecida entre o intestino e o cérebro que detecta a escassez de proteínas e direciona as preferências alimentares para aminoácidos essenciais.

Uma equipe liderada pelo diretor SUH Seong-Bae do Institute for Basic Science, juntamente com colegas da Seoul National University e da Ewha Womans University, mapeou o mecanismo em moscas-das-frutas e confirmou um comportamento semelhante em camundongos. O trabalho foi publicado na revista Science em 21 de maio.

Childhood junk food may leave lasting changes in brain circuits that guide eating, mouse study suggests

21 de maio de 2026 Reportado por IA Imagem gerada por IA Verificado

Researchers at APC Microbiome Ireland at University College Cork report that early-life exposure to a high-fat, high-sugar diet altered feeding behavior and appetite-related brain pathways in mice into adulthood, even after the animals returned to a standard diet and normal body weight. The team also found that a specific Bifidobacterium strain and a prebiotic fiber mix helped mitigate some of these long-term effects.

Oral GLP-1 drugs reduce food reward signals in mice

A new study shows that oral GLP-1 receptor agonists can curb pleasure-driven eating in mice by acting on a brain reward circuit. The research, supported by the National Institutes of Health, examined drugs including orforglipron and danuglipron.

Study in mice finds fructose sends a weaker satiety signal to the brain than glucose

27 de junho de 2026 Reportado por IA Verificado

A study from the Monell Chemical Senses Center reports that, calorie for calorie, fructose and glucose engage different gut–brain pathways in mice. The researchers found glucose more strongly suppresses activity in hunger-related AgRP neurons, while fructose produces a weaker effect through a pathway involving the gut hormone PYY and signaling via the vagus nerve.

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UC Berkeley researchers identify brain circuit linking deep sleep to growth hormone release

Scientists complete first full fruit fly brain and body connectome

An international research team has published the first complete map of neural connections spanning the brain and nerve cord of an adult fruit fly. The work reveals that many behaviors arise from distributed local circuits rather than centralized brain control. The connectome was released June 8 in the journal Nature.

Japanese study links GLP-1 response to ‘external eating’ habits in people with type 2 diabetes

08 de maio de 2026 Reportado por IA Verificado

A year-long observational study in Japan suggests that people with type 2 diabetes who tend to overeat in response to tempting food cues such as sight and smell may see greater weight loss—and possibly better blood-sugar improvement—after starting GLP-1 receptor agonists, while those with primarily emotional eating patterns show less consistent links to long-term outcomes.

sexta-feira, 24 de julho de 2026, 01:53h

Stanford scientists report appetite-suppressing peptide that reduced weight in mice and pigs

quinta-feira, 16 de julho de 2026, 11:45h

Scientists identify receptor for gut toxin linked to colon cancer

segunda-feira, 08 de junho de 2026, 15:34h

Mouse study links acetylcholine bursts in the striatum to switching away from failed habits

quarta-feira, 03 de junho de 2026, 13:32h

Scientists reverse anxiety behaviors in mice by fixing brain circuit

domingo, 31 de maio de 2026, 08:57h

Intermittent energy restriction tied to shifts in brain activity and gut microbiome, small study suggests

terça-feira, 26 de maio de 2026, 12:54h

Young Koreans turn to dopamine sites for quick comfort

domingo, 10 de maio de 2026, 05:49h

Scientists identify molecular switch that limits scratching

sexta-feira, 01 de maio de 2026, 00:37h

Scientists map organized smell receptors in mouse noses

segunda-feira, 27 de abril de 2026, 15:20h