Description
Human MCP-2/CCL8 (Monocyte Chemotactic Protein 2) ELISA Kit
The Human MCP-2 (CCL8) ELISA Kit is specifically designed for the precise measurement of monocyte chemotactic protein-2 levels in human serum, plasma, and cell culture supernatants. This kit boasts exceptional sensitivity and specificity, ensuring dependable and consistent results, making it an excellent tool for a wide array of research purposes.Monocyte chemotactic protein-2, also known as CCL8, plays a vital role in recruiting monocytes to sites of inflammation and infection, contributing to the body's immune response.
Aberrant levels of MCP-2 have been linked to various inflammatory conditions, autoimmune diseases, and cancer, highlighting its significance as a biomarker for investigating these diseases and potential therapeutic interventions.
| Assay type: | Sandwich |
| Format: | 96T |
| Assay time: | 4.5h |
| Reactivity: | Human |
| Detection Method: | Colormetric |
| Detection Range: | 6.25-400 pg/mL |
| Sensitivity: | 3.75 pg/mL |
| Sample Volume Required Per Well: | 100µL |
| Sample Type: | Serum, plasma and other biological fluids |
| Specificity: | This kit recognizes Human MCP-2/CCL8 in samples. No significant cross-reactivity or interference between Human MCP-2/CCL8 and analogues was observed. |
This ELISA kit uses Sandwich-ELISA as the method. The micro ELISA plate provided in this kit has been pre-coated with an antibody specific to Human MCP-2/CCL8. Standards or samples are added to the appropriate micro ELISA plate wells and combined with the specific antibody. Then a biotinylated detection antibody specific for Human MCP-2/CCL8 and Avidin-Horseradish Peroxidase (HRP) conjugate are added to each micro plate well successively and incubated. Free components are washed away. The substrate solution is added to each well. Only those wells that contain Human MCP-2/CCL8, biotinylated detection antibody and Avidin-HRP conjugate will appear blue in color. The enzyme-substrate reaction is terminated by adding Stop Solution and the color turns yellow. The optical density (OD) is measured spectrophotometrically at a wavelength of 450 nm ± 2 nm. The OD value is proportional to the concentration of Human MCP-2/CCL8. The concentration of Human MCP-2/CCL8 in samples can be calculated by comparing the OD of the samples to the standard curve.
| UniProt Protein Function: | CCL8: Chemotactic factor that attracts monocytes, lymphocytes, basophils and eosinophils. May play a role in neoplasia and inflammatory host responses. This protein can bind heparin. The processed form MCP-2(6-76) does not show monocyte chemotactic activity, but inhibits the chemotactic effect most predominantly of CCL7, and also of CCL2 and CCL5 and CCL8. Belongs to the intercrine beta (chemokine CC) family. |
| UniProt Protein Details: | Protein type:Secreted; Chemokine; Secreted, signal peptide; Motility/polarity/chemotaxis Chromosomal Location of Human Ortholog: 17q11. 2 Cellular Component: extracellular space Molecular Function:heparin binding; chemokine activity; phospholipase activator activity; protein kinase activity Biological Process: positive regulation of catalytic activity; cellular calcium ion homeostasis; exocytosis; cell-cell signaling; calcium ion transport; response to virus; immune response; chemotaxis; inflammatory response; signal transduction; protein amino acid phosphorylation |
| NCBI Summary: | This antimicrobial gene is one of several chemokine genes clustered on the q-arm of chromosome 17. Chemokines form a superfamily of secreted proteins involved in immunoregulatory and inflammatory processes. The superfamily is divided into four subfamilies based on the arrangement of N-terminal cysteine residues of the mature peptide. This chemokine is a member of the CC subfamily which is characterized by two adjacent cysteine residues. This cytokine displays chemotactic activity for monocytes, lymphocytes, basophils and eosinophils. By recruiting leukocytes to sites of inflammation this cytokine may contribute to tumor-associated leukocyte infiltration and to the antiviral state against HIV infection. [provided by RefSeq, Sep 2014] |
| UniProt Code: | P80075 |
| NCBI GenInfo Identifier: | 2506280 |
| NCBI Gene ID: | 6355 |
| NCBI Accession: | P80075. 2 |
| UniProt Secondary Accession: | P80075,P78388, A0AV77, |
| UniProt Related Accession: | P80075 |
| Molecular Weight: | 11,246 Da |
| NCBI Full Name: | C-C motif chemokine 8 |
| NCBI Synonym Full Names: | chemokine (C-C motif) ligand 8 |
| NCBI Official Symbol: | CCL8 |
| NCBI Official Synonym Symbols: | HC14; MCP2; MCP-2; SCYA8; SCYA10 |
| NCBI Protein Information: | C-C motif chemokine 8; small-inducible cytokine A8; monocyte chemotactic protein 2; monocyte chemoattractant protein 2; small inducible cytokine subfamily A (Cys-Cys), member 8 (monocyte chemotactic protein 2) |
| UniProt Protein Name: | C-C motif chemokine 8 |
| UniProt Synonym Protein Names: | HC14; Monocyte chemoattractant protein 2; Monocyte chemotactic protein 2; MCP-2; Small-inducible cytokine A8Cleaved into the following chain:MCP-2(6-76) |
| Protein Family: | C-C motif chemokine |
| UniProt Gene Name: | CCL8 |
| UniProt Entry Name: | CCL8_HUMAN |
As the OD values of the standard curve may vary according to the conditions of the actual assay performance (e. g. operator, pipetting technique, washing technique or temperature effects), the operator should establish a standard curve for each test. Typical standard curve and data is provided below for reference only.
| Concentration (pg/mL) | O.D | Average | Corrected |
| 400 | 2.347 2.405 | 2.376 | 2.285 |
| 200 | 1.677 1.725 | 1.701 | 1.61 |
| 100 | 0.965 0.951 | 0.958 | 0.867 |
| 50 | 0.513 0.513 | 0.513 | 0.422 |
| 25 | 0.274 0.248 | 0.261 | 0.17 |
| 12.5 | 0.195 0.191 | 0.193 | 0.102 |
| 6.25 | 0.141 0.145 | 0.143 | 0.052 |
| 0 | 0.086 0.096 | 0.091 | -- |
Precision
Intra-assay Precision (Precision within an assay): 3 samples with low, mid range and high level Human MCP-2/CCL8 were tested 20 times on one plate, respectively.
Inter-assay Precision (Precision between assays): 3 samples with low, mid range and high level Human MCP-2/CCL8 were tested on 3 different plates, 20 replicates in each plate.
| Intra-assay Precision | Inter-assay Precision | |||||
| Sample | 1 | 2 | 3 | 1 | 2 | 3 |
| n | 20 | 20 | 20 | 20 | 20 | 20 |
| Mean (pg/mL) | 20.08 | 46.48 | 176.72 | 18.36 | 49.64 | 165.94 |
| Standard deviation | 1.15 | 2.77 | 7.74 | 1.20 | 2.58 | 8.23 |
| C V (%) | 5.73 | 5.96 | 4.38 | 6.54 | 5.20 | 4.96 |
Recovery
The recovery of Human MCP-2/CCL8 spiked at three different levels in samples throughout the range of the assay was evaluated in various matrices.
| Sample Type | Range (%) | Average Recovery (%) |
| Serum (n=5) | 93-109 | 100 |
| EDTA plasma (n=5) | 93-109 | 100 |
| Cell culture media (n=5) | 84-96 | 90 |
Linearity
Samples were spiked with high concentrations of Human MCP-2/CCL8 and diluted with Reference Standard & Sample Diluent to produce samples with values within the range of the assay.
| Serum (n=5) | EDTA plasma (n=5) | Cell culture media (n=5) | ||
| 1:2 | Range (%) | 85-101 | 86-96 | 97-114 |
| Average (%) | 92 | 91 | 105 | |
| 1:4 | Range (%) | 90-107 | 81-93 | 86-97 |
| Average (%) | 98 | 86 | 91 | |
| 1:8 | Range (%) | 90-104 | 81-91 | 88-99 |
| Average (%) | 95 | 86 | 94 | |
| 1:16 | Range (%) | 88-98 | 80-91 | 87-99 |
| Average (%) | 93 | 86 | 92 |
An unopened kit can be stored at 4°C for 1 month. If the kit is not used within 1 month, store the items separately according to the following conditions once the kit is received.
| Item | Specifications | Storage |
| Micro ELISA Plate(Dismountable) | 8 wells ×12 strips | -20°C, 6 months |
| Reference Standard | 2 vials | |
| Concentrated Biotinylated Detection Ab (100×) | 1 vial, 120 µL | |
| Concentrated HRP Conjugate (100×) | 1 vial, 120 µL | -20°C(shading light), 6 months |
| Reference Standard & Sample Diluent | 1 vial, 20 mL | 4°C, 6 months |
| Biotinylated Detection Ab Diluent | 1 vial, 14 mL | |
| HRP Conjugate Diluent | 1 vial, 14 mL | |
| Concentrated Wash Buffer (25×) | 1 vial, 30 mL | |
| Substrate Reagent | 1 vial, 10 mL | 4°C(shading light) |
| Stop Solution | 1 vial, 10 mL | 4°C |
| Plate Sealer | 5 pieces | |
| Product Description | 1 copy | |
| Certificate of Analysis | 1 copy |
- Set standard, test sample and control (zero) wells on the pre-coated plate and record theirpositions. It is recommended to measure each standard and sample in duplicate. Note: addall solutions to the bottom of the plate wells while avoiding contact with the well walls. Ensuresolutions do not foam when adding to the wells.
- Aliquot 100 µL of standard solutions into the standard wells.
- Add 100 µL of Sample / Standard dilution buffer into the control (zero) well.
- Add 100 µL of properly diluted sample (serum, plasma, tissue homogenates and otherbiological fluids) into test sample wells.
- Cover the plate with the sealer provided in the kit and incubate for 90 min at 37 °C.
- Aspirate the liquid from each well, do not wash. Immediately add 100 µL of BiotinylatedDetection Ab working solution to each well. Cover the plate with a plate seal and gently mix. Incubate for 1 hour at 37 °C.
- Aspirate or decant the solution from the plate and add 350 µL of wash buffer to each welland incubate for 1-2 minutes at room temperature. Aspirate the solution from each well andclap the plate on absorbent filter paper to dry. Repeat this process 3 times. Note: a microplatewasher can be used in this step and other wash steps.
- Add 100 µL of HRP Conjugate working solution to each well. Cover with a plate seal andincubate for 30 min at 37 °C.
- Aspirate or decant the solution from each well. Repeat the wash process for five times asconducted in step 7.
- Add 90 µL of Substrate Reagent to each well. Cover with a new plate seal and incubate forapproximately 15 min at 37 °C. Protect the plate from light. Note: the reaction time can beshortened or extended according to the actual color change, but not by more than 30min.
- Add 50 µL of Stop Solution to each well. Note: Adding the stop solution should be done inthe same order as the substrate solution.
- Determine the optical density (OD value) of each well immediately with a microplate readerset at 450 nm.
