Human NADPH oxidase 4 (NOX4) ELISA Kit- High Sensitivity

Product Name:	Human NADPH oxidase 4 (NOX4) ELISA Kit
SKU:	HUEB1596
Size:	96T
Target:	Human NADPH oxidase 4 (NOX4)
Synonyms:	Kidney oxidase-1, Kidney superoxide-producing NADPH oxidase, Renal NAD(P)H-oxidase, KOX-1, RENOX
Assay Type:	Sandwich
Detection Method:	ELISA
Reactivity:	Human
Detection Range:	0.156-10ng/mL
Sensitivity:	0.078ng/mL

Intra CV:

6.2%

Inter CV:

10.5%

Linearity:

Sample	1:2	1:4	1:8	1:16
Serum(N=5)	105-115%	109-119%	100-112%	95-104%
EDTA Plasma(N=5)	113-125%	94-104%	96-106%	100-112%
Heparin Plasma(N=5)	106-116%	92-103%	85-85%	106-118%

Recovery:

Sample Type	Average(%)	Recovery Range(%)
Serum	98	92-104
Plasma	100	94-106

Function:

Isoform 4: Involved in redox signaling in vascular cells. Constitutively and NADPH-dependently generates reactive oxygen species (ROS). Modulates the nuclear activation of ERK1/2 and the ELK1 transcription factor, and is capable of inducing nuclear DNA damage. Displays an increased activity relative to isoform 1.

Uniprot:	Q9NPH5
Sample Type:	Serum, plasma, tissue homogenates, cell culture supernates and other biological fluids
Specificity:	Natural and recombinant human NADPH oxidase 4
Sub Unit:	Interacts with protein disulfide isomerase (By similarity). Interacts with, relocalizes and stabilizes CYBA/p22phox. Interacts with TLR4.
Research Area:	Cardiovascular
Subcellular Location:	Isoform 4 Nucleus Nucleus Nucleolus
Storage:	Please see kit components below for exact storage details
Note:	For research use only

UniProt Protein Function:	NOX4: Constitutive NADPH oxidase which generates superoxide intracellularly upon formation of a complex with CYBA/p22phox. Regulates signaling cascades probably through phosphatases inhibition. May function as an oxygen sensor regulating the KCNK3/TASK-1 potassium channel and HIF1A activity. May regulate insulin signaling cascade. May play a role in apoptosis, bone resorption and lipolysaccharide-mediated activation of NFKB. May produce superoxide in the nucleus and play a role in regulating gene expression upon cell stimulation. Isoform 3 is not functional. Isoform 4 displays an increased activity. Isoform 5 and isoform 6 display reduced activity. 7 isoforms of the human protein are produced by alternative splicing.
UniProt Protein Details:	Protein type:Membrane protein, integral; EC 1.6.3.-; Membrane protein, multi-pass; Cell cycle regulation; Nucleolus; Oxidoreductase Chromosomal Location of Human Ortholog: 11q14.2-q21 Cellular Component: endoplasmic reticulum membrane; focal adhesion; mitochondrion; perinuclear region of cytoplasm; apical plasma membrane; nucleolus; integral to membrane; stress fiber; NADPH oxidase complex Molecular Function:oxygen sensor activity; electron carrier activity; FAD binding; NAD(P)H oxidase activity; superoxide-generating NADPH oxidase activity; nucleotide binding; heme binding Biological Process: positive regulation of apoptosis; cell morphogenesis; cell aging; homocysteine metabolic process; positive regulation of smooth muscle cell migration; cardiac muscle cell differentiation; positive regulation of MAP kinase activity; negative regulation of cell proliferation; positive regulation of protein kinase B signaling cascade; positive regulation of stress fiber formation; response to hypoxia; inflammatory response; superoxide release; bone resorption
NCBI Summary:	This gene encodes a member of the NOX-family of enzymes that functions as the catalytic subunit the NADPH oxidase complex. The encoded protein is localized to non-phagocytic cells where it acts as an oxygen sensor and catalyzes the reduction of molecular oxygen to various reactive oxygen species (ROS). The ROS generated by this protein have been implicated in numerous biological functions including signal transduction, cell differentiation and tumor cell growth. A pseudogene has been identified on the other arm of chromosome 11. Alternative splicing results in multiple transcript variants.[provided by RefSeq, Jan 2009]
UniProt Code:	Q9NPH5
NCBI GenInfo Identifier:	212276447
NCBI Gene ID:	50507
NCBI Accession:	Q9NPH5.2
UniProt Secondary Accession:	Q9NPH5,Q5K3R4, Q5K3R5, Q5K3R6, Q5K3R8, Q7Z7G3, Q86V92 A8K715, B7Z520, E7EMD7,
UniProt Related Accession:	Q9NPH5
Molecular Weight:	Calculated MW: 6kDa/25-31kDa/58-66kDaObserved MW: 67 kDa
NCBI Full Name:	NADPH oxidase 4
NCBI Synonym Full Names:	NADPH oxidase 4
NCBI Official Symbol:	NOX4
NCBI Official Synonym Symbols:	KOX; KOX-1; RENOX
NCBI Protein Information:	NADPH oxidase 4; kidney oxidase-1; renal NAD(P)H-oxidase; kidney superoxide-producing NADPH oxidase
UniProt Protein Name:	NADPH oxidase 4
UniProt Synonym Protein Names:	Kidney oxidase-1; KOX-1; Kidney superoxide-producing NADPH oxidase; Renal NAD(P)H-oxidase
Protein Family:	NADPH oxidase
UniProt Gene Name:	NOX4
UniProt Entry Name:	NOX4_HUMAN

Component	Quantity (96 Assays)	Storage
ELISA Microplate (Dismountable)	8×12 strips	-20°C
Lyophilized Standard	2	-20°C
Sample Diluent	20ml	-20°C
Assay Diluent A	10mL	-20°C
Assay Diluent B	10mL	-20°C
Detection Reagent A	120µL	-20°C
Detection Reagent B	120µL	-20°C
Wash Buffer	30mL	4°C
Substrate	10mL	4°C
Stop Solution	10mL	4°C
Plate Sealer	5	-

Other materials and equipment required:

Microplate reader with 450 nm wavelength filter
Multichannel Pipette, Pipette, microcentrifuge tubes and disposable pipette tips
Incubator
Deionized or distilled water
Absorbent paper
Buffer resevoir

*Note: The below protocol is a sample protocol. Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.

Allow all reagents to reach room temperature (Please do not dissolve the reagents at 37°C directly). All the reagents should be mixed thoroughly by gently swirling before pipetting. Avoid foaming. Keep appropriate numbers of strips for 1 experiment and remove extra strips from microtiter plate. Removed strips should be resealed and stored at -20°C until the kits expiry date. Prepare all reagents, working standards and samples as directed in the previous sections. Please predict the concentration before assaying. If values for these are not within the range of the standard curve, users must determine the optimal sample dilutions for their experiments. We recommend running all samples in duplicate.

Step
1.	Add Sample: Add 100µL of Standard, Blank, or Sample per well. The blank well is added with Sample diluent. Solutions are added to the bottom of micro ELISA plate well, avoid inside wall touching and foaming as possible. Mix it gently. Cover the plate with sealer we provided. Incubate for 120 minutes at 37°C.
2.	Remove the liquid from each well, don't wash. Add 100µL of Detection Reagent A working solution to each well. Cover with the Plate sealer. Gently tap the plate to ensure thorough mixing. Incubate for 1 hour at 37°C. Note: if Detection Reagent A appears cloudy warm to room temperature until solution is uniform.
3.	Aspirate each well and wash, repeating the process three times. Wash by filling each well with Wash Buffer (approximately 400µL) (a squirt bottle, multi-channel pipette,manifold dispenser or automated washer are needed). Complete removal of liquid at each step is essential. After the last wash, completely remove remaining Wash Buffer by aspirating or decanting. Invert the plate and pat it against thick clean absorbent paper.
4.	Add 100µL of Detection Reagent B working solution to each well. Cover with the Plate sealer. Incubate for 60 minutes at 37°C.
5.	Repeat the wash process for five times as conducted in step 3.
6.	Add 90µL of Substrate Solution to each well. Cover with a new Plate sealer and incubate for 10-20 minutes at 37°C. Protect the plate from light. The reaction time can be shortened or extended according to the actual color change, but this should not exceed more than 30 minutes. When apparent gradient appears in standard wells, user should terminatethe reaction.
7.	Add 50µL of Stop Solution to each well. If color change does not appear uniform, gently tap the plate to ensure thorough mixing.
8.	Determine the optical density (OD value) of each well at once, using a micro-plate reader set to 450 nm. User should open the micro-plate reader in advance, preheat the instrument, and set the testing parameters.
9.	After experiment, store all reagents according to the specified storage temperature respectively until their expiry.

When carrying out an ELISA assay it is important to prepare your samples in order to achieve the best possible results. Below we have a list of procedures for the preparation of samples for different sample types.

Sample Type	Protocol
Serum	If using serum separator tubes, allow samples to clot for 30 minutes at room temperature. Centrifuge for 10 minutes at 1,000x g. Collect the serum fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. If serum separator tubes are not being used, allow samples to clot overnight at 2-8°C. Centrifuge for 10 minutes at 1,000x g. Remove serum and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles.
Plasma	Collect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples at 4°C for 15 mins at 1000 × g within 30 mins of collection. Collect the plasma fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. Note: Over haemolysed samples are not suitable for use with this kit.
Urine & Cerebrospinal Fluid	Collect the urine (mid-stream) in a sterile container, centrifuge for 20 mins at 2000-3000 rpm. Remove supernatant and assay immediately. If any precipitation is detected, repeat the centrifugation step. A similar protocol can be used for cerebrospinal fluid.
Cell culture supernatant	Collect the cell culture media by pipette, followed by centrifugation at 4°C for 20 mins at 1500 rpm. Collect the clear supernatant and assay immediately.
Cell lysates	Solubilize cells in lysis buffer and allow to sit on ice for 30 minutes. Centrifuge tubes at 14,000 x g for 5 minutes to remove insoluble material. Aliquot the supernatant into a new tube and discard the remaining whole cell extract. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Tissue homogenates	The preparation of tissue homogenates will vary depending upon tissue type. Rinse tissue with 1X PBS to remove excess blood & homogenize in 20ml of 1X PBS (including protease inhibitors) and store overnight at ≤ -20°C. Two freeze-thaw cycles are required to break the cell membranes. To further disrupt the cell membranes you can sonicate the samples. Centrifuge homogenates for 5 mins at 5000xg. Remove the supernatant and assay immediately or aliquot and store at -20°C or -80°C.
Tissue lysates	Rinse tissue with PBS, cut into 1-2 mm pieces, and homogenize with a tissue homogenizer in PBS. Add an equal volume of RIPA buffer containing protease inhibitors and lyse tissues at room temperature for 30 minutes with gentle agitation. Centrifuge to remove debris. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Breast Milk	Collect milk samples and centrifuge at 10,000 x g for 60 min at 4°C. Aliquot the supernatant and assay. For long term use, store samples at -80°C. Minimize freeze/thaw cycles.

ELISA	Antibodies
Human NOX4 / NADPH oxidase 5 ELISA Kit	Anti-NOX4 Antibody (CAB11274)[KO Validated]
Human NOX4 (Nicotinamide Adenine Dinucleotide Phosphate Oxidase 4) CLIA Kit (HUES01167)	Anti-NOX4 Antibody (CAB2201)
	Anti-NOX4 Antibody (CAB3656)
	NOVA2 Antibody (PACO10901)
	NOS2 Antibody (PACO14779)