Results 61 to 70 of about 4,927,968 (256)

Evolution‐guided yeast complementation reveals functional differences in human PSPH variants

FEBS Open Bio, EarlyView.
Ancient genomes can help guide which human genetic variants are tested experimentally. This study applies that idea to PSPH, a gene involved in serine biosynthesis, and uses high‐throughput yeast complementation to compare variant function. The findings reveal measurable differences among selected alleles and illustrate the value of evolution‐guided ...
Mauricio Campa‐Álvarez, Diana Ascencio, Miguel Vallebueno‐Estrada, Eduardo González‐Orozco, Christian Eduardo Martínez‐Guerrero, Rafael Montiel, Alexander DeLuna   +6 more
wiley   +1 more source

Hydrophilic Polymers Enable Gastrointestinal Transit Monitoring by Fluorine‐19 Magnetic Resonance Imaging

Advanced Healthcare Materials, EarlyView.
Hydrophilic fluorinated copolymers dissolve in chyme and give a strong, single 19F signal, unlike phase‐separating perfluorocarbons. Combined 1H‐19F MRI tracks their whole‐gut transit non‐invasively and without ionizing radiation. In rats, the tracers move through the gastrointestinal tract, resist resorption, and are well tolerated, a proof‐of‐concept
Ondřej Groborz, Vít Herynek, Mária Hovořáková, Zuzana Pavlíková, Linda Dalecká, Klára Steklíková, Petr Matouš, Petr Páral, Margarita Tkachenko, Filip Koucký, Fatma Nalan Cetin, Ludmila Maffei Svobodová, Jiří Beneš, Kristýna Kolouchová   +13 more
wiley   +1 more source

The metabolism of 3α, 7α, 12α-trihydroxy-5β-cholestan-26-oic acid into cholic: an enzyme assay using homogenates of human liver

Journal of Lipid Research, 1976
An enzyme assay was developed to measure the conversion of the bile acid precursor, 3α, 7α, 12α-trihydroxy-5β-cholestan-26-oic acid (THCA), into cholic acid using homogenates of human liver biopsies.
R F Hanson, H L Sharp, G C Williams
doaj   +1 more source

Association between cholesterol-phospholipid vesicles and cholesterol crystals in human gallbladder bile [PDF]

, 1989
Rapid aggregation of cholesterol-phospholipid vesicles in gallbladder bile seems to be the first event in the production of cholesterol crystals, a prerequisite for cholesterol gallstone formation.
Schriever, Carolin Erika, Jüngst, Dieter   +1 more
core   +1 more source

Lab‐in‐a‐Tube System Integrating Hierarchically Wrinkled Electrodes and DNAzyme‐Functionalized Beads for Diagnosis of Clostridioides difficile Infection

Advanced Materials, EarlyView.
The point‐of‐care diagnosis of Clostridioides difficile infection remains challenging due to reliance on slow culture and amplification‐based methods. A lab‐in‐a‐tube electrochemical biosensor integrating DNAzymes, antifouling magnetic beads, and a hierarchically structured flow cell enables amplification‐ and culture‐free detection directly in stool ...
Survanshu Saxena, Soyeon Lee, Youngeun Choi, Jonathan L'Heureux‐Hache, Jiaying Liu, Sadman Sakib, Sara M. Imani, Marek Smieja, Yingfu Li, Todd Hoare, Leyla Soleymani   +10 more
wiley   +1 more source

Hypercholesterolemia and changes in lipid and bile acid metabolism in male and female cyp7A1-deficient mice

Journal of Lipid Research, 2003
Cholesterol 7α-hydroxylase, a rate-limiting enzyme for bile acid synthesis, has been implicated in genetic susceptibility to atherosclerosis. The gene, CYP7A1, encoding a protein with this activity, is expressed normally only in hepatocytes and is highly
Sandra K. Erickson, Steven R. Lear, Sean Deane, Sandrine Dubrac, Sandra L. Huling, Lien Nguyen, Jaya S. Bollineni, Sarah Shefer, Hideyuki Hyogo, David E. Cohen, Benjamin Shneider, Ephraim Sehayek, Meena Ananthanarayanan, Natarajan Balasubramaniyan, Fredrick J. Suchy, Ashok K. Batta, Gerald Salen   +16 more
doaj   +1 more source

Comparative genomics of lactic acid bacteria reveals a niche-specific gene set [PDF]

, 2009
peer-reviewedBackground: The recently sequenced genome of Lactobacillus helveticus DPC4571 1 revealed a dairy organism with significant homology (75% of genes are homologous) to a probiotic bacteria Lb. acidophilus NCFM 2. This led us to hypothesise that
O\u27Callaghan, John, Callanan, Michael J., Fitzgerald, Gerald F, Gerald F Fitzgerald, Sangrador-Vegas, Amaia, Kaleta Pawel, O'Callaghan John, O'Sullivan, Orla, Fitzgerald Gerald F, Callanan Michael, O\u27Sullivan, Orla, Ross, R. Paul, Fitzgerald, Gerald F., Michael Callanan, O'Callaghan, John, Tom Beresford, Orla O'Sullivan, O'Sullivan Orla, Beresford, Thomas P., John O'Callaghan, Ross R Paul, Kaleta, Pawel, McAuliffe Olivia, Beresford, Tom, Olivia McAuliffe, Lydia Slattery, Amaia Sangrador-Vegas, McAuliffe, Olivia, Slattery Lydia, Pawel Kaleta, R Paul Ross, Slattery, Lydia, Beresford Tom, Ross, R Paul, Callanan, Michael, Sangrador-Vegas Amaia, O'Sullivan, Orla, O'Callaghan, John   +37 more
core   +1 more source

Rab1A Promotes Hepatic Steatosis by Suppressing Mitophagy via the Raf‐1/ERK1/2/PINK1 Signaling Axis

Advanced Science, EarlyView.
Why does fat accumulate in the liver? Our study reveals Rab1A as the molecular switch that silences the cell's mitochondrial cleanup crew. Turning Rab1A off reactivates mitophagy, clears excess fat, and reverses fatty liver disease in mice—offering a promising new therapeutic target for MASLD, a growing global health challenge.
Li Zhang, Jianhua Li, Huilu Zhang, Qi Qin, Yichen Huang, Xiaofan Tian, Chao Sun, Binbin Li, Zhengxin Wang, Xin Zhang   +9 more
wiley   +1 more source

The Role of Bile Acids in Glucose Metabolism and Their Relation with Diabetes

Annals of Hepatology, 2017
Bile acids (BAs), the end products of cholesterol catabolism, are essential for the absorption of lipids and fat-soluble vitamins; but they have also emerged as novel signaling molecules that act as metabolic regulators.
José Alberto González-Regueiro, Lidia Moreno-Castañeda, Misael Uribe, Norberto Carlos Chávez-Tapia   +3 more
doaj   +1 more source

Copper‐Driven Epithelial Barrier Disruption: A Novel Mechanism of COPD Acute Exacerbations Mediated by the TNF‐α/ATP7A Axis

Advanced Science, EarlyView.
This study reveals a copper‐driven mechanism of COPD acute exacerbations mediated by the TNF‐α/ATP7A axis. TNF‐α suppresses the copper transporter ATP7A via competitive NF‐κB/CREB1/CBP signaling, resulting in intracellular copper accumulation, mitochondrial oxidative stress, and epithelial barrier disruption.
Xinru Xiao, Yongzhe Hao, Ziqi Ding, Zhipeng Wang, Yujia Shi, Yanhua Huang, Chunjian Qi, Qian Zhang   +7 more
wiley   +1 more source