Human mBDNF/proBDNF Combo Rapid ELISA Assay

BDNF belongs to the neurotrophin family and regulates the survival and differentiation of neurons during development. The alterations in BDNF expression induced by various kinds of brain insult including stress, ischemia, seizure activity and hypoglycemia, may contribute to some pathologies such as depression, epilepsy, Alzheimer's, and Parkinson's disease. FUNCTION: Promotes the survival of neuronal populations that are all located either in the central nervous system or directly connected to it. Major regulator of synaptic transmission and plasticity at adult synapses in many regions of the CNS. The versatility of BDNF is emphasized by its contribution to a range of adaptive neuronal responses including long-term potentiation (LTP), long-term depression (LTD), certain forms of short-term synaptic plasticity, as well as homeostatic regulation of intrinsic neuronal excitability. SUBUNIT: Monomers and homodimers. Binds to NTRK2/TRKB. SUBCELLULAR LOCATION: Secreted protein. Post Translation Modification (PTM) : The propeptide is N-glycosylated and glycosulfated. PTM: Converted into mature BDNF by plasmin (PLG) (By similarity) . DISEASE: Defects in BDNF are a cause of congenital central hypoventilation syndrome (CCHS) ; also known as congenital failure of autonomic control or Ondine curse. CCHS is a rare disorder characterized by abnormal control of respiration in the absence of neuromuscular or lung disease, or an identifiable brain stem lesion. A deficiency in autonomic control of respiration results in inadequate or negligible ventilatory and arousal responses to hypercapnia and hypoxemia. CCHS is frequently complicated with neurocristopathies such as Hirschsprung disease that occurs in about 16% of CCHS cases. SIMILARITY: Belongs to the NGF-beta family.

The Biosensis Mature BDNF/proBDNF Combo Rapid ELISA Kit combines individual, but complementary ELISA kits for the two most important BDNF isoforms: Mature BDNF (BEK-2211) and full-length proBDNF (BEK-2237) . Both kits are sandwich ELISAs, useful for the quantification of mature BDNF and proBDNF in less than 4 hours in cell culture supernatants, serum, plasma (citrate and EDTA), mouse and rat cell lysates and rat brain extracts, with a simplified protocol and no loss of sensitivity or specificity.

Mature BDNF ELISA:proBDNF ELISA:Cross-reactivity of BDNF isoforms: Mature BDNF ELISA: No cross-reactivity is observed for nerve growth factor (NGF), neurotrophin-3 (NT-3), NT-4/5, glial cell line-derived neurotrophic factor (GDNF) and vascular endothelial growth factor (VEGF165) tested at 25 ng/mL in assay buffer. The reactivity of full-length proBDNF (0.125 ng/mL - 5 ng/mL) was determined in six independent assays using proBDNF proteins from four different sources (mammalian and bacterial, wild-type and mutated) . The average cross-reactivity of proBDNF was found to be 5.3% +/- 0.5% in weight (w/v) concentration, or 12.1% +/- 1.2% in molar concentration (mean +/- SEM) . proBDNF ELISA: Mature BDNF cross-reactivity was assessed by spiking 28 kDa mature BDNF protein obtained from WHO (www.nibsc.org) into a 1/5 diluted human serum sample at 5 ng/mL, which represents a BDNF concentration level of 25 ng/mL in undiluted, normal human serum. Cross-reactivity of mature BDNF was < 0.3% (w/v), or < 0.1% in molar concentration. The assay antibodies do not cross-react with nerve growth factor (NGF), neurotrophin-3 (NT-3) or NT-4/5.Cross-reactivity of BDNF isoforms:Mature BDNF ELISA:proBDNF ELISA: