What does neopterin do?
Neopterin, a pyrazolopyridine compound, is produced by macrophages after induction by interferon γ and serves as a marker of cellular immune system activation. Measurable levels of neopterin have been detected in both the serum and urine of patients suffering from various types of malignancies1 and viral infections.
What is neopterin levels?
Neopterin levels gradually decreased during the course of COVID-19, but severe cases maintained elevated levels for a longer period. Moreover, lower levels of tryptophan and higher levels of kynurenine, indicating an increased tryptophan catabolism, were seen in the group with severe cases.
Is neopterin a cytokine?
It is synthesised by human macrophages upon stimulation with the cytokine interferon-gamma and is indicative of a pro-inflammatory immune status. Neopterin serves as a marker of cellular immune system activation….Neopterin.
| Names | |
|---|---|
| ChemSpider | 395518 |
| DrugBank | DB02385 |
| ECHA InfoCard | 100.016.296 |
| MeSH | Neopterin |
What is Neopterin test?
Neopterin measurements are also useful to monitor therapy in patients with autoimmune disorders and in individuals with HIV infection. Screening of neopterin concentrations in blood donations allows to detect acute infections in a non-specific way and improves safety of blood transfusions.
Is Increased serum Neopterin a surrogate marker?
Neopterin may be a particularly useful surrogate marker for monitoring of control of HIV replication in settings in developing countries where HIV RNA viral load measurement is not available and may be a cheaper alternative particularly if semiquantitative dip stick tests are used for urine samples [5].
What is a surrogate biomarker?
A surrogate endpoint has been defined as ‘a biomarker intended to substitute for a clinical endpoint’, the latter being ‘a characteristic or variable that reflects how a patient feels, functions, or survives'[4].
What is an example of a surrogate outcome?
An example is blood pressure reduction as a surrogate risk for stroke, for a well-studied class of antihypertensive agents. Level 3 is a nonvalidated surrogate outcome, yet one established to be reasonably likely to predict clinical benefit for a. specific disease setting and class of intervention.
Is blood pressure a surrogate endpoint?
Background: Blood pressure is considered to be a leading example of a valid surrogate endpoint.
What is a surrogate outcome measure?
A surrogate endpoint is a clinical trial endpoint used as a substitute for a direct measure of how a patient feels, functions, or survives. A surrogate endpoint does not measure the clinical benefit of primary interest in and of itself, but rather is expected to predict that clinical benefit.
Which biomarker is considered as surrogate end points?
Introduction
| End point | Definition* | Example |
|---|---|---|
| Diabetes mellitus | ||
| Surrogate end point | Biomarker or intermediate end point intended to substitute and predict for patient-relevant final end point | HbA1c and glucose control as surrogate for diabetes complications and mortality |
What is a surrogate study?
What is a surrogate endpoint in clinical trials?
Listen to pronunciation. (SER-uh-gut END-poynt) In clinical trials, an indicator or sign used in place of another to tell if a treatment works. Surrogate endpoints include a shrinking tumor or lower biomarker levels.
What is the function of neopterin?
Neopterin belongs to the chemical group known as pteridines. It is synthesised by human macrophages upon stimulation with the cytokine interferon-gamma and is indicative of a pro-inflammatory immune status. Neopterin serves as a marker of cellular immune system activation. Neopterin as disease marker.
Is neopterin concentration associated with glucose metabolism-associated parameters in diabetic patients?
In the present study, we found that serum neopterin concentration was significantly associated with glucose metabolism-associated parameters, such as HOMA-IR, disposition index as well as serum glucose level and basal C-peptide. It was higher in patients with T2D than in those with NGT or prediabetes.
Is neopterin a purine or catabolic?
Neopterin is a catabolic product of guanosine triphosphate (GTP), a purine nucleotide . Neopterin belongs to the chemical group known as pteridines.
Is neopterin a good biomarker of inflammation?
Neopterin is produced by lymphocytes, macrophages, dendritic cells, and probably neurons after stimulation by interferon-γ. Therefore, high neopterin concentration in plasma or CSF is widely considered as a sensitive but nonspecific biomarker of immune-mediated and inflammatory disorders.