Bile acids malabsorption (BAM) is encountered in numerous gastrointestinal pathologies and is a good example of a treatable cause of watery diarrhea after ileal resection. The gold standard for diagnosing BAM is the selenium homocholic acid taurine test (SeHCAT), an expensive and complex analysis. An alternative method is the quantification of 7α-hydroxy-4-cholesten-3-one (C4). Here, we present a simple, ultra high-performance liquid chromatography-tandem mass spectrometry method to measure C4 in human serum. To avoid time consuming sample preparation (e.g., derivatization, solid phase extraction), we used absorption chemistry-based extraction plates. This method demonstrates a lower limit of quantification of 5 ng/mL and is linear over a concentration range from 5 to 300 ng/mL (R = 0.9977). Inaccuracy and imprecision were less than 15%. The validated method is currently used for routine measurement of C4 from serum in patients to confirm BAM diagnosis.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11324611 | PMC |
| http://dx.doi.org/10.1016/j.clinms.2017.02.001 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Faricimab efficacy in type 1 macular neovascularization: AI-assisted quantification of pigment epithelium detachment (PED) volume reduction over 12 months in Naïve and switch eyes.
Int J Retina Vitreous
January 2025
Fondation Asile des Aveugles, Department of Ophthalmology, Jules-Gonin Eye Hospital, University of Lausanne, Avenue de France 54, Lausanne, 1001, Switzerland.
Background: This study evaluates the efficacy of intravitreal Faricimab in reducing pigment epithelium detachment (PED) and fluid volumes in both treatment-naïve eyes and eyes unresponsive to anti-VEGF mono-therapies, all diagnosed with type 1 macular neovascularization (T1 MNV) over a period of 12-month.
Methods: A retrospective, single-center cohort study was conducted at the Jules Gonin Eye Hospital, Lausanne, Switzerland. Clinical records of treatment-naïve and non-responder switch patients presenting T1 MNV secondary to neovascular age-related macular degeneration (nAMD) from September 2022 to March 2023 were reviewed.
Indirect determination of hemoglobin A2 reference intervals in Pakistani infants using data mining.
BMC Med Inform Decis Mak
January 2025
Department of Pathology and Laboratory Medicine, The Aga Khan University Hospital, Stadium Road, Karachi, 74800, Pakistan.
Background: Reference intervals (RIs) are crucial for distinguishing healthy from sick individuals and vary across age groups. Hemoglobinopathies are common in Pakistan, making the quantification of hemoglobin variants essential for screening. Direct RIs are established by measuring values from a healthy reference population, whereas indirect RIs, use statistical analysis of routine lab data to estimate values, making it feasible in settings where direct data is unavailable.
View Article and Find Full Text PDFA real-world drug safety surveillance study from the FAERS database of hepatocellular carcinoma patients receiving pembrolizumab alone and plus lenvatinib.
Sci Rep
January 2025
Department of Hepatobiliary and Pancreatic Surgery, Taihe Hospital, Affiliated Hospital of Hubei University of Medicine, Shiyan, 442000, Hubei, China.
Pembrolizumab plus Lenvatinib is regarded as a significant treatment option for advanced unresectable hepatocellular carcinoma (HCC). This study aims to meticulously monitor and identify adverse events (AEs) related to this combined therapy, enhance patient safety, and offer evidence-based recommendations for the appropriate use of these drugs. We gathered adverse drug reactions (ADRs)-related data from the FAERS database for HCC patients who received Pembrolizumab, both alone and in combination with Lenvatinib from the first quarter of 2014 to the fourth quarter of 2023.
View Article and Find Full Text PDFEarly and Mid-Term Disposition of α-PVP and its unknown Metabolites in Urine and Oral Fluid Through a Multi-Analytical Hyphenated Approach Following a Single Non-Controlled Administration to Healthy Volunteers.
AAPS J
January 2025
National Center On Addiction and Doping, National Institute of Health, Viale Regina Elena 299, 00161, Rome, Italy.
Nowadays, synthetic cathinones (SCs) is the second more representative subclass of New Psychoactive Substances, accounting for 104 analogues in the illegal market. Since its first report in 2011, α-pyrrolidinovalerophenone (α-PVP) gained popularity among drug users, provoking an increased number of intoxications. Nonetheless, pharmacokinetics data is still limited in the literature.
View Article and Find Full Text PDFWireless power-up and readout from a label-free biosensor.
Biomed Microdevices
January 2025
Department of Electrical and Computer Engineering, Rutgers University, Piscataway, NJ, 08854, USA.
Wearable and implantable biosensors have rapidly entered the fields of health and biomedicine to diagnose diseases and physiological monitoring. The use of wired medical devices causes surgical complications, which can occur when wires break, become infected, generate electrical noise, and are incompatible with implantable applications. In contrast, wireless power transfer is ideal for biosensing applications since it does not necessitate direct connections between measurement tools and sensing systems, enabling remote use of the biosensors.
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!