N-acetylaspartate (NAA), the brain's second most abundant metabolite, provides essential substrates for myelination through its hydrolysis. However, activities and physiological roles of NAA in other tissues remain unknown. Here, we show aspartoacylase (ASPA) expression in white adipose tissue (WAT) governs systemic NAA levels for postprandial body temperature regulation. Proteomics and mass spectrometry revealed NAA accumulation in WAT of knockout mice stimulated the pentose phosphate pathway and pyrimidine production. Stable isotope tracing confirmed higher incorporation of glucose-derived carbon into pyrimidine metabolites in knockout cells. Additionally, serum NAA positively correlates with the pyrimidine intermediate orotidine and this relationship predicted lower body mass index in humans. Using whole-body and tissue-specific knockout mouse models, we demonstrate that fat cells provided plasma NAA and suppressed postprandial body temperature elevation. Furthermore, exogenous NAA supplementation reduced body temperature. Our study unveils WAT-derived NAA as an endocrine regulator of postprandial body temperature and physiological homeostasis.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10802732 | PMC |
| http://dx.doi.org/10.21203/rs.3.rs-3835159/v1 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enhanced bone cement for fixation of prosthetic joint utilizing nanoparticles.
J Mater Sci Mater Med
January 2025
Biomedical Engineering Department, Faculty of Engineering, Helwan University, Cairo, Egypt.
Bone cement is commonly utilized to secure prosthetic joints in the body because of its robust fixation, stability, biocompatibility, and immediate load-bearing capability. However, issues such as loosening, leakage, and insufficient bioactivity can lead to its failure. Therefore, improving its mechanical, physical, and biological properties is crucial for enhancing its efficiency.
View Article and Find Full Text PDFWhat is the Difference Between the Different Types of Thermometers?
Turk Arch Pediatr
January 2025
Department of Pediatric Infectious Disease, Faculty of Medicine, Ankara Yıldırım Beyazıt University, Ankara City Hospital, Ankara, Türkiye.
Objective: There is no widely accepted method that can reflect the core temperature exactly. The aim of this study is to investigate the accuracy of frequently used body temperature measurement methods. Materials and Methods: A total of 104 patients aged 3-9 years were included in this cross-sectional study.
View Article and Find Full Text PDFCryopreservation Method for Preventing Freeze-Fracture of Small Muscle Samples.
Bio Protoc
January 2025
Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA, USA.
Histological techniques to study muscle are crucial for assessing skeletal muscle health. To preserve tissue morphology, samples are usually fixed in formaldehyde or cryopreserved immediately after excision from the body. Freezing samples in liquid nitrogen, using isopentane as a mediator for efficient cooling, preserves the tissue in its natural state.
View Article and Find Full Text PDFA prospective comparative trial to determine the optimal number of EUS-guided fineneedle passes for successful organoid creation in pancreatic ductal adenocarcinoma.
Endosc Ultrasound
December 2024
Center of Excellence for Stem Cell and Cell Therapy, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Introduction: EUS-guided fine-needle organoid creation (EUS-FNO) from pancreatic cancer (PC) has been increasingly important for precision medicine. The cost for pancreatic organoid creation is substantial and close to 2000 USD/specimen in our institution, and the specimen has to be processed immediately after tissue acquisition so the more passes and specimens, the higher cost of organoid creation will incur. To date, no prospective comparison trial has answered how many needle passes of EUS-FNO needed for a successful organoid creation.
View Article and Find Full Text PDFMenstrual variations of sleep-wake rhythms in healthy women.
Sleep Biol Rhythms
January 2025
Laboratory of Animal Physiology, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-Ku, Kawasaki, Kanagawa 214-8571 Japan.
The ovarian steroid hormones, estrogen and progesterone, the levels of which fluctuate dynamically with the estrous cycle, alter circadian behavioral rhythms in mammals. However, it remains unclear whether the sleep-wake rhythm fluctuates with the menstrual cycle in humans. To ascertain the relationship between the menstrual cycle and sleep-wake rhythms, we evaluated the objective and long-term sleep-wake rhythms of ten healthy women using a recently developed wearable device.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!