肠道微生物群和通过缓释蛋白替代物的代谢调节在基uria:从PREMP研究的发现
Martina Tosi1,2, Matteo Domenico Marsiglia1, Emerenziana Ottaviano1
1Department of Health Sciences, University of Milan, 20142 Milan, Italy.
Nutrients
|December 31, 2025
概括
一种新的缓释蛋白替代品 (PS) 改善了患者的胰岛素敏感性和肠道微生物群. 这种饮食管理显示了PKU治疗的前景.
科学领域:
- 代谢障碍 代谢障碍 代谢障碍
- 胃肠病学 胃肠病学
- 微生物组研究 微生物组研究
背景情况:
- 基尿症 (PKU) 是一种遗传性代谢障碍,需要通过低氨酸 (Phe) 饮食和无Phe蛋白替代品 (PS) 进行终身饮食管理.
- 缓释PS配方正在出现,通过模仿自然蛋白质吸收来提高代谢稳定性和耐受性.
研究的目的:
- 评估一种新型缓释,无Phe的PS对PKU患者肠道微生物群组成和代谢参数的影响.
- 在PKU管理中评估缓释PS的安全性和耐受性.
主要方法:
- 在PREMP研究中,注册了PKU患者 (≥6岁),他们在4个月内至少将50%的通常PS摄入量替换为缓释配方.
- 使用16S rRNA基因测序分析了肠道微生物群,并量化了便脂肪酸.
- 在基线和干预后进行了临床,生化和营养评估.
主要成果:
- 13名患者完成了这项研究,平均78%的PS摄入量被缓释配方取代.
- 氨酸和氨酸的血水平保持稳定;然而,禁食胰岛素和HOMA-IR显著下降,表明胰岛素敏感性得到改善.
- 肠道微生物群表现出稳定的多样性,丰富度增加和有益的属 (例如,Bacteroides,Bifidobacterium),以及减少的特定属 (例如,Hafnia). 便丁酸盐显示非显著的增加.
结论:
- 缓释PS是安全的,耐受性良好,在不影响氨基酸或营养状况的情况下增强了PKU患者的胰岛素敏感性.
- 微生物转移表明对肠道健康的潜在益处,支持在更大,长期研究中进一步调查.
相关概念视频
Inborn Errors of Metabolism
679
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
679
Overview of Protein Metabolism
3.5K
Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted.
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
3.5K
Pharmacokinetics in Pediatric Patients: Drug Metabolism
171
In pediatric care, understanding the nuances of hepatic drug metabolism is crucial, as it significantly differs from that of adults. This divergence is primarily due to the developmental stage of drug-metabolizing enzymes, which affects how medications are processed in the body. In neonates, for instance, the activity of Phase I enzymes—critical for the initial breakdown of drugs—is markedly reduced, functioning at just 20–40% of the levels seen in adults. This reduction poses...
171
Pharmacokinetics in Pediatric Patients: Overview and Drug Absorption
225
Understanding the physiological differences in the pediatric population is crucial for effective pharmacotherapy. Neonates, infants, and children exhibit significant variations in gastric pH, gastric emptying time, intestinal transit time, and biliary function. These variations profoundly affect oral drug absorption, necessitating a nuanced approach to pediatric dosing.Neonates present with a unique physiological profile, having a gastric pH greater than 4 and faster and more irregular gastric...
225
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion
153
Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
153
Overview of Metabolism
37.5K
Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
37.5K


