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Human Apelin ELISA Kit

SKU:
HUFI01836
Product Type:
ELISA Kit
Size:
96 Assays
Uniprot:
Q9ULZ1
Sensitivity:
37.5pg/ml
Range:
62.5-4000pg/ml
ELISA Type:
Competitive
Synonyms:
APLN, Apelin, APEL, XNPEP2, APJ endogenous ligand
Reactivity:
Human
Research Area:
Cardiovascular
$719
Frequently bought together:

Description

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Human Apelin ELISA Kit

The Human Apelin ELISA Kit is specifically designed for the precise quantification of apelin levels in human biological samples, such as serum, plasma, and cell culture supernatants. This kit boasts high sensitivity and specificity, ensuring accurate and reliable results for a variety of research applications.Apelin is a peptide hormone that plays a crucial role in regulating cardiovascular function, fluid homeostasis, and metabolic processes.

Dysregulation of apelin levels has been linked to various conditions, including obesity, diabetes, and cardiovascular diseases, making it a valuable biomarker for studying these diseases and potential therapeutic interventions.With its user-friendly protocol and robust performance, the Human Apelin ELISA Kit is an essential tool for researchers looking to explore the role of apelin in different physiological and pathological processes.

Product Name:Human Apelin ELISA Kit
Product Code:HUFI01836
Size:96 Assays
Alias:APLN, Apelin, APEL, XNPEP2, APJ endogenous ligand
Detection method:Competitive ELISA, Coated with Antibody
Application:This immunoassay kit allows for the in vitro quantitative determination of Human APLN concentrations in serum plasma and other biological fluids.
Sensitivity:37.5pg/ml
Range:62.5-4000pg/ml
Storage:4°C for 6 months
Note:For Research Use Only
Recovery:Matrices listed below were spiked with certain level of Human APLN and the recovery rates were calculated by comparing the measured value to the expected amount of Human APLN in samples.
MatrixRecovery range(%)Average(%)
serum(n=5)89-10394
EDTA plasma(n=5)86-10493
UFH plasma(n=5)89-10595
Linearity:The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human APLN and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Sample1:21:41:8
serum(n=5)87-97%88-105%88-103%
EDTA plasma(n=5)92-101%82-100%93-101%
UFH plasma(n=5)80-95%80-100%81-98%
CV(%):Intra-Assay: CV<8%
Inter-Assay: CV<10%
ComponentQuantityStorage
ELISA Microplate(Dismountable)8×12 strips4°C for 6 months
Lyophilized Standard24°C/-20°C
Sample/Standard Dilution Buffer20ml4°C
Biotin-labeled Antibody(Concentrated)60ul4°C (Protect from light)
Antibody Dilution Buffer10ml4°C
HRP-Streptavidin Conjugate(SABC)120ul4°C (Protect from light)
SABC Dilution Buffer10ml4°C
TMB Substrate10ml4°C (Protect from light)
Stop Solution10ml4°C
Wash Buffer(25X)30ml4°C
Plate Sealer5-

Other materials and equipment required:

  • Microplate reader with 450 nm wavelength filter
  • Multichannel Pipette, Pipette, microcentrifuge tubes and disposable pipettetips
  • Incubator
  • Deionized or distilled water
  • Absorbent paper
  • Buffer resevoir
UniprotQ9ULZ1
UniProt Protein Function:apelin: Endogenous ligand for APJ, an alternative coreceptor with CD4 for HIV-1 infection. Inhibits HIV-1 entry in cells coexpressing CD4 and APJ. Apelin-36 has a greater inhibitory activity on HIV infection than other synthetic apelin derivatives. The oral intake in the colostrum and the milk could have a role in the modulation of the immune responses in neonates. May also have a role in the central control of body fluid homeostasis by influencing AVP release and drinking behavior. Belongs to the apelin family.
UniProt Protein Details:Protein type:Secreted; Secreted, signal peptide

Chromosomal Location of Human Ortholog: Xq25

Cellular Component: extracellular space; extracellular region

Molecular Function:G-protein-coupled receptor binding; hormone activity; apelin receptor binding; receptor binding

Biological Process: lactation; immune response; signal transduction

NCBI Summary:This gene encodes a peptide that functions as an endogenous ligand for the G protein coupled receptor APJ. The encoded protein is synthesized as a prepropeptide that is processed into biologically active C-terminal fragments. The peptide fragments activate different tissue specific signaling pathways that regulate diverse biological functions including fluid homeostasis, cardiovascular function and insulin secretion. This protein also functions as a coreceptor for the human immunodeficiency virus 1.[provided by RefSeq, Feb 2010]
UniProt Code:Q9ULZ1
NCBI GenInfo Identifier:20137569
NCBI Gene ID:8862
NCBI Accession:Q9ULZ1.1
UniProt Secondary Accession:Q9ULZ1,Q4VY08, Q8WU89,
UniProt Related Accession:Q9ULZ1
Molecular Weight:8,569 Da
NCBI Full Name:Apelin
NCBI Synonym Full Names:apelin
NCBI Official Symbol:APLN
NCBI Official Synonym Symbols:APEL; XNPEP2
NCBI Protein Information:apelin; AGTRL1 ligand; APJ endogenous ligand
UniProt Protein Name:Apelin
UniProt Synonym Protein Names:APJ endogenous ligand
UniProt Gene Name:APLN
UniProt Entry Name:APEL_HUMAN

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

Equilibrate the TMB substrate for at least 30 min at 37°C beforeuse. When diluting samples and reagents, they must be mixed completely andevenly. It is recommended to plot a standard curve for each test.

StepProtocol
1.Set standard, test sample and control (zero) wells on the pre-coatedplate respectively, and then, record their positions. It isrecommended to measure each standard and sample in duplicate. Washplate 2 times before adding standard, sample and control (zero) wells!
2.Add Sample and Biotin-detection antibody: Add 50µL of Standard, Blank or Sample per well. The blankwell is added with Sample Dilution Buffer. Immediately add 50 µL of biotin-labelled antibody workingsolution to each well. Cover with the plate sealer provided. Gently tap the plate to ensure thoroughmixing. Incubate for 45 minutes at 37°C. (Solutions are added to the bottom of micro-ELISA platewell, avoid touching plate walls and foaming).
3.Wash: Aspirate each well and wash, repeating the process three timesWash by filling each well with Wash Buffer (approximately 350µL)using a squirt bottle, multi-channel pipette, manifold dispenser orautomated washer. Complete removal of liquid at each step is essentialto good performance. After the last wash, remove any remaining WashBuffer by aspirating or decanting. Invert the plate and pat it againstthick clean absorbent paper.
4.HRP-Streptavidin Conjugate(SABC): Add 100µL of SABC workingsolution to each well. Cover with a new Plate sealer. Incubate for30minutes at 37°C.
5.Wash: Repeat the aspiration/wash process for five times.
6.TMB Substrate: Add 90µL of TMB Substrate to each well. Coverwith a new Plate sealer. Incubate for about 10-20 minutes at 37°C.Protect from light. The reaction time can be shortened or extendedaccording to the actual color change, but not more than 30minutes.When apparent gradient appeared in standard wells, you can terminatethe reaction.
7.Stop: Add 50µL of Stop Solution to each well. Color turn toyellow immediately. The adding order of stop solution should be as thesame as the substrate solution.
8.OD Measurement: Determine the optical density (OD Value) of each wellat once, using a microplate reader set to 450 nm. You should open themicroplate reader ahead, preheat the instrument, and set the testing parameters.

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 TypeProtocol
SerumIf 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.

PlasmaCollect 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 FluidCollect 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 supernatantCollect 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 lysatesSolubilize 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 homogenatesThe 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 lysatesRinse 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 MilkCollect 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.

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