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1,5-Anhydroglucitol (1,5-AG) is a non-fasting glycemic marker that responds to hyperglycemia excursions. The reduction in serum levels of 1,5-AG is associated with an increase in postprandial glycemia and glycosuria, phenomena that increase the risk and severity of diabetic complications. The objective is to assess the ability of 1,5-AG to discriminate type 2 diabetes (T2D) patients without overt kidney disease, for screening or diagnostic purposes. The Human Research Ethics Committee of Universidade Federal do Paraná (UFPR) approved the project. Serum samples from 567 individuals classified as healthy subjects (n = 291) and T2D (n = 276) with moderate glycemic control (HbA1c of 7-8%), matched by gender, were analyzed. Serum 1,5-AG levels were measured using an automated enzymatic method (GlycoMark, Inc.). Receiver Operating Characteristic (ROC) curve analysis for 1,5-AG showed sensibility of 65.3% and specificity of 91.1% to detect T2D at cut-off point of 92 µmol/L. The results were similar to the groups' discrimination by glycemia (sensibility/specificity, 62.2%; 89.0%) at cut-off point of 6.3 mmol/L. HbA1c was the best discriminator (sensibility/specificity, 87.4%; 94.2%) at a cut-off point of 5.8% (40 mmol/mol). The serum 1,5-AG concentration was not able to discriminate T2D in the presence of moderate glycemic control with no overt nephropathy.

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BACKGROUND: The medium-term impact of gastric bypass (GB) surgery on the inflammatory state and endothelial function of patients has yet to be confirmed. OBJECTIVE: This study aims to elucidate the inflammatory profile and endothelial dysfunction response of adults with obesity 6 and 24 months after undergoing GB surgery. METHODS: The anthropometric and biochemical markers of 32 adults with obesity (two men and 30 females) were collected preoperatively, and 6 and 24 months postoperatively. RESULTS: Body mass index (BMI) and excess weight had decreased by 15.79 ± 1.21 kg/m2 (p < 0.01) and 83.80 ± 24.50% respectively at 24 months. Leptin, C-reactive protein (CRP), plasminogen activator inhibitor-1 (PAI-1) levels, and the leptin/adiponectin ratio decreased significantly at both postoperative follow-up points compared with preoperative values (p < 0.01). IL-6 and ICAM-1 levels decreased between 6 and 24 months post-GB (p < 0.01). IL-6 and ICAM-1 levels decreased between 6- and 24-months post-GB (p < 0.01). Resistin levels were significantly decreased (p < 0.01) at 6-month follow-up. The levels of the anti-inflammatory biomarkers IL-10, adiponectin, and the adiponectin/leptin ratio significantly increased postoperatively. There was an improvement in metabolic disorders after surgery. CONCLUSION: Our results demonstrated that after GB there was an improvement in the inflammatory profile, identified by a reduction in pro-inflammatory markers (CRP, IL-6, leptin) and an increase in anti-inflammatory markers (adiponectin, IL-10). The decrease in PAI-1 and ICAM-1 levels may suggest improvement in endothelial function. These findings provide clear evidence of the medium-term impact of GB on inflammation state and a number of endothelial markers, and a consequent reduction in the risk of cardiovascular diseases.

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1,5 anhydroglucitol (1,5-AG), is a nonmetabolized 1-deoxy form of glucose, originate mainly from the diet. 1,5-AG is a biomarker to detect and magnify hyperglycemic excursions (postprandial hyperglycemia) in diabetic patients. Concentrations of 1,5-AG has been applied as supporting biomarker to diagnosis of the major forms of diabetes (type 1, type 2, and gestational). The serum 1,5-AG reference interval is relevant to the appropriate clinical application of this biomarker. This article contains data regards to serum concentration of the biomarker primarily for healthy subjects, capture from the literature, in different populations. Correlation analysis between 1,5-AG and markers associated with diabetes and its complication were presented. The data was complementary to the study "Reference intervals for serum 1,5-anhydroglucitol in children, adolescents, adults, and pregnant women" (Welter et al., 2018). The data present in this article improve the comparisons for 1,5-AG in different conditions and methodologies.

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BACKGROUND: 1,5-anhydroglucitol (1,5-AG) is a validated marker of short-term glycemic control. We determined the reference intervals of 1,5-AG in different age groups and during pregnancy. METHODS: Blood samples were collected from 2303 Euro-Brazilian healthy subjects: 580 children, 496 adolescents, 922 adults matched by age and sex, and 305 pregnant women in four gestational periods. Serum 1,5-AG was measured using an enzymatic reagent in an automated system. RESULTS: The calculated reference intervals (nonparametric, 2.5th-97.5th) for males and females were, respectively: children, 96-302 and 89-277 µmol/l; adolescents, 84-311 and 79-277 µmol/l; and adults, 80-260 and 62-241 µmol/l. Males consistently showed significantly higher concentrations than females. 1,5-AG reference intervals in pregnant women were 56-298 µmol/l at <23 weeks gestation (n = 110), 37-166 µmol/l at 24-28 weeks gestation (n = 106), 34-155 µmol/l at 29-32 weeks gestation (n = 52), and 33-246 µmol/l at >32 weeks gestation (n = 37). No significant differences in 1,5-AG concentration were observed between non-pregnant and pregnant women at <23 weeks of gestation. A negative correlation (r = -0.287; p < .001) between 1,5-AG concentration and age was observed. CONCLUSIONS: The reference intervals for 1,5-AG were affected by sex and age.

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BACKGROUND: Approximately 40% of HIV infected patients have chronic meningitis at various stages during the infection, 59% are asymptomatic. This is a diagnosis of exclusion and a confounding factor in cerebrospinal fluid (CSF) analysis, any other causes of chronic meningitis by opportunistic or co-infection must be ruled out. The aim of this study was to analyze CSF lactic acid (LA) as an adjuvant biomarker in chronic meningitis due to HIV. METHODS: CSF LA was quantified in 223 CSF samples by the Dimension AR (Dade Behring, Deerfield, IL, USA), distributed into nine groups: 1) HIV positive with an increase in CSF WBCs (n=17); 2) HIV positive with normal CSF (n=20); 3) enterovirus meningitis (n=33); 4) Herpesviridae meningoencephalitis (n=30); 5) fungal meningitis (n=25); 6) tuberculosis (TB) meningitis (n=17); 7) toxoplasmosis (n=18); 8) neurosyphilis (n=6); 9) control group (n=57). RESULTS: CSF LA (median; IQR) was higher in samples with TB meningitis (5.5; 2.9-7.5 mmol/L) and Cryptococcus neoformans meningitis (3.9; 2.7-5.8 mmol/L) compated with samples with HIV chronic meningitis (1.7; 1.4-1.9 mmol/L) and other groups (p ≤ 0.0001). For the diagnosis of HIV chronic meningitis, using a cut-off of 3.5 mmol/L, CSF LA showed high sensitivity and negative predictive value, although low specificity. CONCLUSIONS: CSF LA helps to discriminate between C. neoformans or TB meningitis and HIV chronic meningitis: CSF LA can be included with the methods currently used to identify these specific pathogens, though it does not replace them. It is rapid, inexpensive and easy to perform, and can be used in developing countries.

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