临床表现 临床表现
H Matthew Lehrer1, Aryan Govil2, Hau-Tieng Wu2
1University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
概括
黑色素释放与体温下降有关,在老年人中观察到性别差异. 更高的黑激素和温度下降可能有利于女性的认知能力.
科学领域:
- 时间生物学 时间生物学
- 神经内分泌学神经内分泌学
- 老年学是指老年学的学科.
背景情况:
- 假设夜间的黑激素分泌会影响核心体温 (Tc) 降低和认知功能.
- 之前的研究还没有研究黑激素,Tc和认知之间的关系中的性别差异.
- 了解这些性别差异对于阐明黑激素潜在的益智效应至关重要.
研究的目的:
- 检查黑色素 (AUC和DLMO) 与夜间核心体温下降 (Tdrop) 的关系中的性别差异.
- 调查美拉和Tdrop与老年人的认知功能相关的性别差异.
主要方法:
- 65名没有认知障碍的老年人 (32名女性,33名男性) 接受了60小时的睡眠剥夺实验室研究.
- 持续监测核心体温 (Tc),每小时测量唾液黑激素 (AUC,DLMO).
- 黑色素参数与Tdrop (Tc觉醒 - Tc睡眠) 和神经认知结果以后进行评估.
主要成果:
- 较高的黑激素AUC与两性中较大的Tdrop相关,但女性的时间较早.
- 较早的暗光黑激素发作 (DLMO) 与两性中较大的Tdrop相关.
- 黑素AUC仅在女性中与更好的记忆和视觉空间功能有关;Tdrop与女性的执行功能和注意力,男性的语言有关.
结论:
- 黑色素释放与夜间Tdrop密切相关,时间和强度的性别特异性差异.
- 升高的黑激素和Tdrop可能会提供认知保护,特别是在老年女性身上.
- 需要进一步的研究来探索与衰老相关的变化,如更年期,如何影响这些性别差异.
相关概念视频
01:24Chronic Kidney Disease II: Clinical Manifestations
516
Chronic Kidney Disease (CKD) progressively impairs multiple body systems due to the accumulation of uremic toxins, which disrupt cellular functions across various organs.Neurologic symptomsNeurologic symptoms often arise early in CKD, as uremic toxin buildup drives changes in cognitive and motor functions. Patients frequently experience fatigue, headache, confusion, difficulty concentrating, and, in severe cases, seizures. Peripheral neuropathy commonly manifests as burning sensations in the...
516
01:30Coronary Artery Disease III: Clinical Manifestations
295
Coronary Artery Disease (CAD) is a primary health risk worldwide, leading to significant morbidity and mortality. The condition arises from the buildup of atherosclerotic plaques within the coronary arteries, resulting in diminished blood supply to the heart muscle.The clinical manifestations of CAD vary widely, from asymptomatic stages to severe, life-threatening conditions. Understanding these manifestations is crucial for early diagnosis and effective management.Angina Pectoris: The Warning...
295
01:25Endocarditis II: Clinical Features of Infective Endocarditis
358
Endocarditis can present various clinical features depending on the causative organism and the patient's underlying health conditions. Initially, the clinical features of infective endocarditis develop gradually, presenting with nonspecific symptoms that can be easily mistaken for other illnesses.General SymptomsEarly symptoms of infective endocarditis are fever, chills, weakness, malaise, fatigue, and weight loss. These symptoms reflect the systemic nature of the infection and the body's...
358
01:26Heart Failure III: Clinical Manifestations
430
Heart failure (HF) manifests primarily as dyspnea, fatigue, and fluid retention, resulting in peripheral and pulmonary edema. Symptoms may vary depending on which ventricle is more affected, left or right.Left-Sided Heart FailureAlso known as left ventricular failure, this condition results from the left ventricle's inability to fill or eject sufficient blood into the systemic circulation. It leads to pulmonary congestion, which occurs when the left ventricle fails to eject blood effectively...
430
01:29Gastroesophageal Reflux Disease II: Clinical Features and Management
647
Gastroesophageal reflux disease, or GERD, is a persistent medical condition that affects many individuals worldwide. Its clinical manifestations can vary greatly, making diagnosis and management challenging for healthcare professionals. The following is a comprehensive overview of the clinical manifestations, assessment, and management strategies for GERD.
Clinical Manifestations
GERD presents itself in a multitude of ways, with symptoms varying from person to person. The hallmark symptoms are...
Clinical Manifestations
GERD presents itself in a multitude of ways, with symptoms varying from person to person. The hallmark symptoms are...
647
01:30Hypertension III: Clinical Manifestations and Diagnostic Studies
433
Hypertension is asymptomatic and also referred to as the "silent killer" until it progresses to a severe stage or causes target organ disease. Patients may experience symptoms stemming from the strain on blood vessels and tissues in various organs or the heart's increased workload.Physical exams might show no abnormalities other than high blood pressure. Signs of vascular damage, when present, correspond to the organs supplied by the affected vessels, leading to target organ damage. For...
433