OBJECTIVES: Concentrations of neopterin, kynurenine and kynurenine/tryptophan ratios predict prognosis and the need for oxygen therapy in patients hospitalized for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. The aims of the present study were to evaluate the changes of these biomarkers early in the course of infection, the association with the prior coronavirus disease (COVID-19) vaccination and therapeutic administration of Anti-SARS-CoV-2 monoclonal antibodies, investigation of other potential biomarkers including neuropilin, 8-hydroxy-2-deoxyguanosine and 8-hydroxyguanosine in patients hospitalized with SARS-CoV-2 infection and an assessment of these biomarkers and vitamins A, E and D in patients with post-COVID syndrome. METHODS: Urine and blood samples were obtained on the 1st to the 4th day and 4th to 7th day from 108 patients hospitalized with COVID-19. Chromatography tandem mass spectrometry methods were used to analyse neopterin, kynurenine, tryptophan, liposoluble vitamins, and DNA damage biomarkers. RESULTS: A statistically significant decrease of neopterin, kynurenine and kynurenine/tryptophan ratios was observed on after 4th to 7th day of hospitalization, and concentrations of these biomarkers were increased in patients with poor prognosis and subsequent post-COVID syndrome. The concentrations of remaining biomarker and vitamins were not associated with outcomes, although markedly decreased concentrations of vitamin A, E and D were noted. CONCLUSIONS: The concentrations of neopterin, kynurenine and kynurenine/tryptophan ratios decrease during the course of infection SARS-CoV-2 and are associated with the post-COVID syndrome. No other prognostic biomarkers were identified.
- MeSH
- biologické markery * krev MeSH
- COVID-19 * krev MeSH
- dospělí MeSH
- hospitalizace MeSH
- kynurenin * krev MeSH
- lidé středního věku MeSH
- lidé MeSH
- neopterin * krev moč MeSH
- postakutní syndrom COVID-19 MeSH
- SARS-CoV-2 * izolace a purifikace MeSH
- senioři MeSH
- tryptofan * krev MeSH
- vitamin A krev MeSH
- vitamin D krev MeSH
- vitamin E krev MeSH
- vitaminy krev MeSH
- zánět krev MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
AIM: To analyze the prognostic significance of serum and urinary neopterin concentrations in patients with rectal adenocarcinoma treated with (chemo)radiation. PATIENTS AND METHODS: Urinary and serum neopterin and peripheral blood cell count were determined in 49 patients with rectal carcinoma before the start of (chemo)radiation. RESULTS: Neopterin concentrations exhibited a significant inverse correlation with hemoglobin and positive correlation with leukocyte count, platelet count and platelet-to-lymphocyte ratio. Increased serum neopterin concentration was associated with significantly inferior relapse-free survival (RFS) and overall survival. However, a significant association was observed only in 28 patients treated in the neoadjuvant setting. Although increased urinary neopterin was also associated with inferior RFS and overall survival, this was not statistically significant. The neutrophil-to-lymphocyte ratio was also associated with poor prognosis. CONCLUSION: The data presented herein indicate a prognostic significance of serum neopterin concentrations in patients with rectal cancer treated with neoadjuvant chemoradiation.
- MeSH
- chemoradioterapie metody MeSH
- lidé středního věku MeSH
- lidé MeSH
- nádory rekta radioterapie terapie MeSH
- neopterin krev moč MeSH
- prognóza MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři nad 80 let MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Among malignant diseases, chronic myeloid leukaemia (CML) is one of the best suited candidates for immunotherapy. For this purpose it is necessary to broaden the present knowledge on the immunology of this disease. As a part of such a project, the levels of kynurenine (KYN) and neopterin (NPT) were studied in 28 CML patients and in the same number of healthy subjects. At diagnosis, both KYN and NPT levels were found to be elevated in a significant portion of the patients and dependent on their leukocyte count. As in the case of KYN, increased NPT levels dropped after achieving remission. When correlating KYN and NPT levels with a selection of other markers tested, significant association was revealed only in the case of CRP and IL-6. However, there were several patients with increased KYN levels in whom NPT was not detected, and vice versa. The relapse of the disease observed in two patients was accompanied by an increased level of NPT in both cases, but by an increased level of KYN in only one of them. No significant correlation was found between KYN and NPT levels in sera taken at diagnosis. However, when the whole set of sera was taken into consideration, the association became statistically significant. Although the data obtained revealed a number of similarities between KYN and NPT production in CML patients, it also suggested a difference in the kinetics of these two biomarkers' production.
- MeSH
- biologické markery krev MeSH
- C-reaktivní protein metabolismus MeSH
- chronická myeloidní leukemie krev MeSH
- dospělí MeSH
- interleukin-6 krev MeSH
- kynurenin krev MeSH
- lidé středního věku MeSH
- lidé MeSH
- lineární modely MeSH
- mladý dospělý MeSH
- neopterin krev MeSH
- počet leukocytů MeSH
- senioři MeSH
- studie případů a kontrol MeSH
- tryptofan krev MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
An electrochemical immunoassay for neopterin was developed using recently produced specific antibodies immobilized to protein A-coated magnetic beads in combination with differential pulse voltammetry and screen-printed array of electrodes. Neopterin-alkaline phosphatase conjugate was used as label in a competitive assay format. Multiplexed analysis of neopterin was demonstrated by replacing the traditional ELISA with electrochemical detection and the traditional plastic wells with screen-printed array of electrodes. The optimized electrochemical method, based on polyclonal antibodies, reached a limit of detection of 0.008 ng/mL with an average RSD %=10. Serum samples collected from patients with sepsis, healthy volunteers and other patients without a confirmed clinical diagnosis were also analyzed. The obtained results, compared with those of a commercial ELISA kit, had a significant correlation, showing the possibility to distinguish among the serum samples from ill or healthy subjects.
- MeSH
- biologické markery MeSH
- biosenzitivní techniky * MeSH
- elektrochemické techniky MeSH
- elektrody MeSH
- imobilizované proteiny imunologie MeSH
- imunoanalýza MeSH
- lidé MeSH
- neopterin analýza krev imunologie MeSH
- protilátky imunologie MeSH
- sepse krev MeSH
- zánět MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
OBJECTIVE: Pentraxin-3 (PTX3) appears to have a cardioprotective effect through a positive influence against postreperfusion damage. This study assesses the prognostic value of PTX3 level and its relationship with clinical parameters and markers of oxidative stress and nitric oxide metabolism in patients with ST-elevation myocardial infarction (STEMI). METHODS: Plasma/serum levels of several biomarkers of inflammation and oxidative stress and nitrite/nitrate were assessed upon admission and 24 h after STEMI onset in patients treated by primary percutaneous coronary intervention. RESULTS: ROC analysis showed that plasma PTX3 at 24 h was a strong predictor of 30-day and 1-year mortality and independent predictor of combined end-point of left ventricle dysfunction or mortality in 1 year. The inflammatory response expressed by PTX3 had a significant relationship with age, heart failure, infarct size, impaired flow in the infarct-related artery, and renal function and positively correlated with neopterin, TNF-α, 8-hydroxy-2'-deoxyguanosine, and nitrite/nitrate. CONCLUSIONS: Plasma PTX3 at 24 h after STEMI onset is a strong predictor of 30-day and 1-year mortality. PTX3 as a single biomarker is comparable with currently used scoring systems (TIMI or GRACE) or B-type natriuretic peptide. PTX3 is also an independent predictor of combined end-point of left ventricle dysfunction or mortality in 1 year.
- MeSH
- biologické markery krev MeSH
- C-reaktivní protein metabolismus MeSH
- deoxyguanosin analogy a deriváty krev MeSH
- dusitany krev MeSH
- infarkt myokardu krev mortalita MeSH
- lidé středního věku MeSH
- lidé MeSH
- natriuretický peptid typu B krev MeSH
- neopterin krev MeSH
- oxidační stres * MeSH
- prediktivní hodnota testů MeSH
- senioři MeSH
- sérový amyloidový protein metabolismus MeSH
- srdeční selhání krev mortalita MeSH
- TNF-alfa krev MeSH
- troponin I krev MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- senioři MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- hodnotící studie MeSH
- práce podpořená grantem MeSH
Neopterin and biopterin belong to a group of unconjugated pterin derivates. These biomolecules are present in many animal species and perform several functions. Pterin concentrations may provide additional information on the effect of stress on immune system activity. This study focused on an investigation of the effect of crating on plasma concentrations of neopterin and biopterin in broilers. The effects of 2 crating periods (2 and 4 h) were monitored in Hubbard broilers (n = 90) aged 42 d. After a given crating period, randomly selected chickens from each group were sampled immediately and the remaining chickens were sampled after 24 h. Plasma corticosterone increased (P < 0.001) immediately after 2 and 4 h crating, but no difference between the crated and the control noncrated broilers was found 24 h later. Immediately after crating, neopterin in 2- and 4-h broilers did not differ from the control, but 24 h later a decrease (P = 0.011) in plasma neopterin was found in 4-h broilers compared with the control. Simultaneously, 24 h after crating, neopterin levels in 2- and 4-h broilers decreased (P < 0.001) in comparison with the levels immediately after crating. Plasma biopterin was higher (P < 0.001) in 4-h broilers than in the control immediately after the crating. A time of sampling effect (P = 0.016) was found for the heterophil-to-lymphocyte ratio, with heterophil-to-lymphocyte ratio higher 24 h after crating in comparison with its level immediately after the crating. This study shows that crating may significantly affect the immune system of broiler chickens. This is corroborated by the increase in plasma biopterin concentrations in broilers immediately after crating and the decrease in plasma neopterin concentrations in broilers 24 h after crating. The correlations were found for widely used indicators of acute and chronic stress in birds [i.e., plasma corticosterone concentrations (biopterin) and the heterophil-to-lymphocyte ratio (neopterin), respectively].
- MeSH
- biochemická analýza krve MeSH
- biologické markery krev MeSH
- biopteriny krev MeSH
- doprava * MeSH
- fyziologický stres fyziologie MeSH
- kortikosteron krev MeSH
- kur domácí krev fyziologie MeSH
- náhodné rozdělení MeSH
- neopterin krev MeSH
- pohoda zvířat MeSH
- přirozená imunita * MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Klíčová slova
- PET, zánětlivé markery,
- MeSH
- hypertenze MeSH
- komplikace těhotenství diagnóza imunologie prevence a kontrola MeSH
- lidé MeSH
- neopterin diagnostické užití krev moč MeSH
- předčasná porodní činnost metabolismus prevence a kontrola MeSH
- předčasný porod MeSH
- preeklampsie etiologie imunologie prevence a kontrola MeSH
- těhotenství MeSH
- Check Tag
- lidé MeSH
- těhotenství MeSH
- ženské pohlaví MeSH
Increased serum or urinary concentrations of neopterin have been described in patients with tumors of different primary locations, but reports on neopterin in patients with breast carcinoma are relatively innumerous. We have evaluated urinary neopterin in 456 patients with breast carcinoma. Urinary neopterin was determined using high-performance liquid chromatography. Neopterin in patients was increased only in a minority of patients with breast carcinoma. Increased urinary neopterin was associated with inferior overall survival. Prognostic significance of increased urinary neopterin was evident in patients with tumors expressing hormone receptors or/and human epidermal growth factor receptor (HER)-2, but not in patients with triple negative tumors. Among other parameters determined, C-reactive protein, hemoglobin, peripheral blood neutrophil count and platelet count were significant prognostic factors. On multivariate analysis, age, expression of hormone receptors, neutrophils, stage and hemoglobin concentration were independent prognostic indicators. In conclusion, serum neopterin is increased only in a minority of patients with breast carcinoma. Increased urinary neopterin was predictive of poor survival in univariate, but not multivariate analysis. Age, expression of hormone receptors, neutrophils, stage and hemoglobin concentration were independent prognostic indicators.
- MeSH
- C-reaktivní protein analýza MeSH
- erbB receptory analýza MeSH
- hemoglobiny analýza MeSH
- lidé MeSH
- multivariační analýza MeSH
- nádory prsu mortalita moč MeSH
- neopterin krev moč MeSH
- neutrofily cytologie MeSH
- počet leukocytů MeSH
- počet trombocytů MeSH
- prognóza MeSH
- receptory pro estrogeny analýza MeSH
- receptory progesteronu analýza MeSH
- vysokoúčinná kapalinová chromatografie MeSH
- Check Tag
- lidé MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Neopterin is a valuable biomarker of cellular immunity associated with various pathological situations such as viral and bacterial infections, autoimmune, cardiovascular, neurodegenerative and malignant disorders. To produce specific antibodies against neopterin for a rapid multi-biomarker-based diagnosis, a novel hapten derivative was synthesized and attached to carrier proteins. The thoroughly characterized conjugates were used for immunization of BALB/c mice and rabbits. The produced monoclonal antibody reached in both direct and indirect enzyme-linked immunosorbent assay (ELISA) format LoD of 0.18 and 0.45 μg L(-1), respectively, and was a superior immunoreagent for further biosensor developments with regard to assay sensitivity and material availability. The best polyclonal antibody was somewhat more sensitive in direct ELISA with LoD of 0.05 μg L(-1). The optimized ELISA method was evaluated with blood samples collected from patients with renal insufficiency, patients with sepsis, patients without confirmed clinical diagnosis, and healthy volunteers. In plasma samples, neopterin concentrations ranging from 3.2 to 103 μg L(-1) could be determined with the monoclonal ELISA whereas twofold lower results were obtained with the polyclonal ELISA. A satisfactory correlation of results was found between the polyclonal ELISA and IBL Neopterin ELISA kit within the concentration range 0.5-16 μg L(-1) (R = 0.874; n = 40), and slightly lower correlation was found for monoclonal-based ELISA (R = 0.819; n = 40). These data show that the generated antibodies may be used as functional analytical reagents for the integration into multianalyte biochip detection systems.
- MeSH
- biosenzitivní techniky metody MeSH
- ELISA metody MeSH
- hapteny chemie imunologie MeSH
- králíci MeSH
- lidé MeSH
- monoklonální protilátky imunologie MeSH
- myši inbrední BALB C MeSH
- myši MeSH
- neopterin krev imunologie MeSH
- protilátky imunologie MeSH
- renální insuficience krev MeSH
- senzitivita a specificita MeSH
- sepse krev MeSH
- specificita protilátek MeSH
- tvorba protilátek MeSH
- zvířata MeSH
- Check Tag
- králíci MeSH
- lidé MeSH
- myši MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- hodnotící studie MeSH
- práce podpořená grantem MeSH
A new HPLC method for simultaneous determination of neopterin, creatinine, kynurenine and tryptophan in human serum was developed and validated. Monolithic stationary phase's technology (two monolithic columns RP-18e were connected with guard monolithic cartridge 4.6 mm × 50 mm+3.0 mm × 100 mm and 4.6 × 10 mm) and special auto sampler for micro titration plates (samples are storage in dark cooled place protected against evaporation) were combined with easy sample preparation step. As mobile phase 15 mmol/L phosphate buffer at pH 4.50 was used. Neopterin and tryptophan were detected using fluorescent detection and kynurenine and creatinine were detected by diode-array detection. This method may be suitable for large sequences of samples in clinical research and routine practice.
- MeSH
- fosfáty chemie MeSH
- koncentrace vodíkových iontů MeSH
- kreatinin krev MeSH
- kynurenin krev MeSH
- lidé MeSH
- neopterin krev MeSH
- pufry MeSH
- reprodukovatelnost výsledků MeSH
- tryptofan krev MeSH
- vysokoúčinná kapalinová chromatografie přístrojové vybavení metody MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
