Tryptamines are a group of hallucinogenic drugs whose detection in body fluids could be simplified by immunochemical assay kits. Antibodies for these assays are obtained by the immunization of laboratory animals with conjugates of a hapten similar to the target analyte and a suitable protein. Therefore we synthesized novel haptens derived from tryptamine-based drugs, with ,-dimethyltryptamine (DMT), 5-methoxy-,-dimethyltryptamine (5-MeO-DMT) and ,-diisopropyltryptamine (DiPT) selected as the target analytes. Their structures were modified with a short linker ended with a carboxylic group. The haptens were conjugated with bovine serum albumin (BSA) and rabbits were immunized with the conjugates. The obtained polyclonal antibodies showed good reactivity and the LOD of the constructed ELISAs was in the range 0.006-0.254 ng mL. Thus, they are suitable for the development of immunochemical assay kits.
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http://dx.doi.org/10.1039/c8ra02528b | DOI Listing |
Int J Mol Sci
December 2024
Department of Medical Sciences, Graduate School of The Catholic University of Korea, Seoul #222 Banpo-daero, Seocho-gu, Seoul 06591, Republic of Korea.
Cannabichromene (CBC) is one of the main cannabinoids found in the cannabis plant, and although less well known than tetrahydrocannabinol (THC) and cannabidiol (CBD), it is gaining attention for its potential therapeutic benefits. To date, CBC's known mechanisms of action include anti-inflammatory, analgesic, antidepressant, antimicrobial, neuroprotective, and anti-acne effects through TRP channel activation and the inhibition of inflammatory pathways, suggesting that it may have therapeutic potential in the treatment of inflammatory skin diseases, such as atopic dermatitis (AD), but its exact mechanism of action remains unclear. Therefore, in this study, we investigated the effects of CBC on Th2 cytokines along with the Janus kinase (JAK)/signal transducer and activator of transcription (STAT) pathways involved in AD pathogenesis.
View Article and Find Full Text PDFJ Agric Food Chem
January 2025
National Key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, and Beijing Laboratory for Food Quality and Safety, China Agricultural University, Beijing 100193, People's Republic of China.
DNA-decorated hapten (DDH)-based immunoassays have emerged, demonstrating supreme advantages in sensing applications because of their excellent sensitivity, specificity, and reliability. DDH combines both a recognition element (hapten) and a signal transduction element (DNA portion) with its highly programmable DNA structure enabling the trigger of signal transduction following a recognition event, thereby introducing a novel signal transduction mechanism to immunoassays. In this review, we provide a critical overview of recent research in the DDH-based immunoassays, which are designed to detect specific small molecules and antibodies.
View Article and Find Full Text PDFAnal Chem
December 2024
National Key Laboratory of Veterinary Public Health Safety, Beijing Key Laboratory of Detection Technology for Animal-Derived Food Safety, College of Veterinary Medicine China Agricultural University, 100193 Beijing, People' s Republic of China.
Food Chem
February 2025
National Key Laboratory of Veterinary Public Health and Safety, Beijing Key Laboratory of Detection Technology for Animal Derived Food Safety, College of Veterinary Medicine, China Agricultural University, Beijing 100193, People's Republic of China; Technology Innovation Center for Food Safety Surveillance and Detection (Hainan), Sanya Institute of China Agricultural University, Sanya 572025, People's Republic of China. Electronic address:
Xylazine (XYL) is an illicit adulterant in opioids and an approved veterinary sedative drug, which has been abused, misused, and residued in food samples, endangering people health, causing drug-facilitated crimes and even death. Immunoassay used antibody as core biomaterial could to achieve highly sensitive and rapid detection screening purpose for XYL in situ. Here, we rationally designed four novel XYL haptens with different spacer arms to produce antibodies with high affinity and specificity.
View Article and Find Full Text PDFThe extracellular matrix (ECM) is known to regulate innate immune cells but its role in T cell functions is poorly understood. Here, we show a protective role for ECM proteoglycans, lumican and biglycan in hapten-induced contact dermatitis that is achieved through limiting proinflammatory CD4 T cells. Lumican and biglycan-null mice develop significant inflammation with greater numbers of CD4 T cells in hapten-challenged ear pinnae, while their draining lymph nodes show increased T-bet-STAT1 signaling, Th1 commitment, and IFN-γ secreting CD4 T cell proliferation.
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