Exploring serum amino acid signatures as potential biomarkers in Hashimoto's thyroiditis patients.

Hashimoto's thyroiditis (HT) is an autoimmune disease caused by the immune system attacking healthy tissues. However, the exact pathogenesis of HT remains unclear. Metabolomic analysis was performed to obtain information about the possible pathogenic mechanisms and diagnostic biomarkers of HT. The amino acid profile was analyzed using an LC-MS/MS method using serum samples obtained from 30 patients diagnosed with ultrasonographic imaging and laboratory markers (thyroid stimulating hormone) free thyroxine and thyroid peroxidase) and 30 healthy individuals. There were statistically significant changes in 27 amino acids out of 32 amino acids analyzed (p < 0.05). Based on the receiver operating characteristic curve analysis, the six amino acid (1-methylhistidine, cystine, norvaline, histidine, glutamic acid and leucine) biomarkers showed high sensitivity, specificity (area under the curve > 0.98), positive likelihood ratio and low negative likelihood ratio. Also, according to pathway analysis, degradation of phenylalanine, tyrosine and tryptophan biosynthesis was the highest metabolic pathway according to the impact value (p < 0.001 and impact value = 1.0). We provide serum amino acid profiles of patients with Hashimoto's thyroiditis and identify five potential biomarkers for early diagnosis by clinicians.

Evaluation of cerebrospinal fluid levels for ALOX5, S100B, DEFA1, and GFAP in infectious meningitis.

BACKGROUND: The aim of this study was to determine how the levels of peptide and protein-based biomarkers in cerebrospinal fluid change in bacterial, tuberculous, and aseptic meningitis, and to determine the success of these agents in distinguishing between different types of infectious meningitis. METHODS: The levels of arachidonate-5-lipoxygenase, S100 calcium-binding protein B, defensin-α 1, and glial fibrillary acidic protein in cerebrospinal fluid samples from 20 tuberculosis, 40 bacterial, 25 aseptic meningitis patients, and 55 control groups were measured and compared using an enzyme-linked immunosorbent assay. RESULTS: The mean age of the patients was 37.9 ±â€…14.4 years. The parameter that contributed the most to the differential diagnosis of the infectious meningitis groups was S100 calcium-binding protein B. The S100 calcium-binding protein B levels were significantly higher in the tuberculous meningitis group than in the other groups, and arachidonate-5-lipoxygenase levels were significantly higher in the tuberculous meningitis and bacterial meningitis groups (P < .05). CONCLUSION: This study showed that cerebrospinal fluid arachidonate-5-lipoxygenase, and S100 calcium-binding protein B levels may differ in bacterial, aseptic, and tuberculous meningitis, and the results obtained may be quite effective as important potential biomarkers in the differential diagnosis of different types of meningitis.

Determination of Serum Differential Carnitine Ester Levels in HIV(+) Patients: A Cross-Sectional Study.

OBJECTIVE: It has been reported that carnitine deficiency is observed in various viral infections and in the follow-up of the prognosis of some diseases. In this cross-sectional study, we aimed to determine how carnitine ester derivatives change in HIV-positive patients. MATERIALS AND METHODS: In this study, 25 HIV-infected patients who applied to Harran University Faculty of Medicine Education Research and Practice Hospital Infectious Diseases and Clinical Microbiology Outpatient Clinic and who did not receive any antiretroviral treatment, as well as 25 healthy volunteers were included in the study. Carnitine ester levels in serum samples were measured by Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (LC-MS/MS) method (Shimadzu North America, Columbia, MD, USA). RESULTS: While suberoylcarnitine (C8DC), myristoleylcarnitine (C14:1), tetradecadienoylcarnitine (C14:2), palmitoleylcarnitine (C16:1), and linoleylcarnitine (C18:2) levels in HIV(+) patients were quite low compared to the control group, tiglylcarnitine (C5:1) levels were high (p ≤ 0.05). In addition, C5:1 and C14:2 index parameters according to VIP score, and C5:1 and C14:1/C16 index parameters according to ROC analysis were determined as markers with high potential to distinguish HIV(+) patients from healthy volunteers. CONCLUSION: This study showed that levels of acylcarnitine derivatives might be altered in HIV(+) patients, and the results obtained may contribute to a better understanding of carnitine metabolism.

Cedrus libani tar prompts reactive oxygen species toxicity and DNA damage in colon cancer cells.

BACKGROUND: Many chemotherapeutic drugs used in cancer treatment have anticancer properties by inducing reactive oxygen species (ROS). However, the same effect occurs in normal cells, limiting the availability of these drugs. Therefore, studies on the detection of new herbal anticancer agents that have selective effects on cancer cells are of great importance. The aim of this study is to investigate the metabolite profile of Cedrus libani tar and its mechanism of anticancer effect on colon cancer cells. METHODS AND RESULTS: Effect of cedar tar on cells (12 cancers and 5 normal cell lines) viability was determined by MTT, apoptosis induction was determined by Annexin-V, ROS and MMP determined by flow cytometry assay. Cleaved caspase-8, 9 and Ɣ-H2AX expression determined by western blot. Apoptotic and antioxidant genes expression level determined by qPCR. Metabolite profiling was performed with LC-MS/MS and GC-MS. Cedar tar showed the highest cytotoxic effect among cancer cells in colon cancer (HCT-116, IC50: 30.4 µg/mL) and its toxic effect on normal cells (HUVEC, IC50: 74.07 µg/mL) was less than cancer cell. Cedar tar increases ROS production in colon cancer cells. The metabolite profile of the cedar tar contains high amounts of metabolites such as fatty acids mainly (Duprezianene, Himachalene and Chamigrene), phenolic compounds (mostly Coumarin, p-coumaric acid, Vanillic acid and tr-Ferulic acid etc.) and organic acids (mainly 3-oh propanoic acid, 2-oh butyric acid and 3-oh isovaleric acid etc.). CONCLUSION: As a result, it has been found that cedar tar has the potential to be used in the treatment of colon cancer.