Description
Human Neurofibromin ELISA Kit
The Human Neurofibromin ELISA Kit is specifically designed for the precise measurement of neurofibromin levels in human serum, plasma, and cell culture supernatants. With its high sensitivity and specificity, this kit delivers accurate and reproducible results, making it a valuable tool for various research applications.Neurofibromin is a key protein involved in the regulation of cell growth and division, with mutations in the corresponding gene linked to neurofibromatosis type 1 (NF1), a genetic disorder characterized by tumor growth along nerves.
Studying neurofibromin levels can provide insights into the pathogenesis of NF1 and other related conditions, offering potential targets for therapeutic interventions.Overall, the Human Neurofibromin ELISA Kit is essential for researchers seeking to investigate the role of neurofibromin in disease development and progression, paving the way for novel diagnostic and treatment strategies.
| Product Name: | Human Neurofibromin ELISA Kit |
| Product Code: | HUFI02039 |
| Size: | 96 Assays |
| Alias: | NF1, Neurofibromatosis-related protein NF-1 |
| Detection method: | Sandwich ELISA, Double Antibody |
| Application: | This immunoassay kit allows for the in vitro quantitative determination of Human NF1 concentrations in serum plasma and other biological fluids. |
| Sensitivity: | 46.875pg/ml |
| Range: | 78.125-5000pg/ml |
| Storage: | 4°C for 6 months |
| Note: | For Research Use Only |
| Recovery: | Matrices listed below were spiked with certain level of Human NF1 and the recovery rates were calculated by comparing the measured value to the expected amount of Human NF1 in samples. | ||||||||||||||||
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| Linearity: | The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human NF1 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected. | ||||||||||||||||
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| CV(%): | Intra-Assay: CV<8% Inter-Assay: CV<10% |
| Component | Quantity | Storage |
| ELISA Microplate (Dismountable) | 8×12 strips | 4°C for 6 months |
| Lyophilized Standard | 2 | 4°C/-20°C |
| Sample/Standard Dilution Buffer | 20ml | 4°C |
| Biotin-labeled Antibody(Concentrated) | 120ul | 4°C (Protect from light) |
| Antibody Dilution Buffer | 10ml | 4°C |
| HRP-Streptavidin Conjugate(SABC) | 120ul | 4°C (Protect from light) |
| SABC Dilution Buffer | 10ml | 4°C |
| TMB Substrate | 10ml | 4°C (Protect from light) |
| Stop Solution | 10ml | 4°C |
| Wash Buffer(25X) | 30ml | 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
| Uniprot | P21359 |
| UniProt Protein Function: | NF1: a Ras-GAP, highly expressed in developing neural cells. Possesses tumor suppressor activity, presumably by virtue of its GTPase activating domain. Neurofibromin is phosphorylated in response to EGF in CNS cells and cell lines. Defects in NF1 are the cause of type 1 neurofibromatosis (NF1), Watson syndrome, and familial spinal neurofibromatosis. NF1 is one of the most frequent autosomal dominant diseases. Four alternatively spliced isoforms have been described. |
| UniProt Protein Details: | Protein type:Tumor suppressor; GAPs, Ras; GAPs; Nucleolus; Motility/polarity/chemotaxis Chromosomal Location of Human Ortholog: 17q11.2 Cellular Component: membrane; axon; dendrite; cytoplasm; nucleolus; nucleus Molecular Function:protein binding; phosphatidylethanolamine binding; phosphatidylcholine binding Biological Process: negative regulation of Rac protein signal transduction; neural tube development; negative regulation of MAP kinase activity; Schwann cell development; extracellular matrix organization and biogenesis; collagen fibril organization; positive regulation of apoptosis; heart development; negative regulation of transcription factor import into nucleus; negative regulation of neuroblast proliferation; regulation of glial cell differentiation; positive regulation of adenylate cyclase activity; negative regulation of neurotransmitter secretion; skeletal muscle development; adrenal gland development; forebrain morphogenesis; negative regulation of cell-matrix adhesion; regulation of synaptic transmission, GABAergic; myelination in the peripheral nervous system; camera-type eye morphogenesis; induction of apoptosis via death domain receptors; negative regulation of fibroblast proliferation; negative regulation of endothelial cell proliferation; negative regulation of protein kinase activity; positive regulation of endothelial cell proliferation; cerebral cortex development; actin cytoskeleton organization and biogenesis; forebrain astrocyte development; metanephros development; regulation of long-term neuronal synaptic plasticity; negative regulation of osteoclast differentiation; phosphoinositide 3-kinase cascade; wound healing; regulation of cell-matrix adhesion; regulation of blood vessel endothelial cell migration; smooth muscle development; sympathetic nervous system development; positive regulation of neuron apoptosis; visual learning; negative regulation of Ras protein signal transduction; cell communication; negative regulation of cell migration; regulation of bone resorption; negative regulation of MAPKKK cascade; MAPKKK cascade; liver development; regulation of angiogenesis; peripheral nervous system development; osteoblast differentiation; negative regulation of oligodendrocyte differentiation; negative regulation of angiogenesis; pigmentation; spinal cord development; negative regulation of astrocyte differentiation; Ras protein signal transduction; response to hypoxia; artery morphogenesis; brain development; cognition Disease: Neurofibromatosis, Familial Spinal; Watson Syndrome; Juvenile Myelomonocytic Leukemia; Neurofibromatosis, Type I; Neurofibromatosis-noonan Syndrome |
| NCBI Summary: | This gene product appears to function as a negative regulator of the ras signal transduction pathway. Mutations in this gene have been linked to neurofibromatosis type 1, juvenile myelomonocytic leukemia and Watson syndrome. The mRNA for this gene is subject to RNA editing (CGA>UGA->Arg1306Term) resulting in premature translation termination. Alternatively spliced transcript variants encoding different isoforms have also been described for this gene. [provided by RefSeq, Jul 2008] |
| UniProt Code: | P21359 |
| NCBI GenInfo Identifier: | 4557793 |
| NCBI Gene ID: | 4763 |
| NCBI Accession: | NP_000258 |
| UniProt Related Accession: | P21359 |
| Molecular Weight: | |
| NCBI Full Name: | neurofibromin isoform 2 |
| NCBI Synonym Full Names: | neurofibromin 1 |
| NCBI Official Symbol: | NF1  |
| NCBI Official Synonym Symbols: | WSS; NFNS; VRNF  |
| NCBI Protein Information: | neurofibromin |
| UniProt Protein Name: | Neurofibromin |
| UniProt Synonym Protein Names: | Neurofibromatosis-related protein NF-1 |
| Protein Family: | Neurofibromin |
| UniProt Gene Name: | NF1  |
| UniProt Entry Name: | NF1_HUMAN |
*Note: Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.
Before adding to wells, equilibrate the SABC working solution and TMB substrate for at least 30 min at 37°C. When diluting samples and reagents, they must be mixed completely and evenly. It is recommended to plot a standard curve for each test.
| Step | Protocol |
| 1. | Set standard, test sample and control (zero) wells on the pre-coated plate respectively, and then, record their positions. It is recommended to measure each standard and sample in duplicate. Wash plate 2 times before adding standard, sample and control (zero) wells! |
| 2. | Aliquot 0.1ml standard solutions into the standard wells. |
| 3. | Add 0.1 ml of Sample / Standard dilution buffer into the control (zero) well. |
| 4. | Add 0.1 ml of properly diluted sample ( Human serum, plasma, tissue homogenates and other biological fluids.) into test sample wells. |
| 5. | Seal the plate with a cover and incubate at 37 °C for 90 min. |
| 6. | Remove the cover and discard the plate content, clap the plate on the absorbent filter papers or other absorbent material. Do NOT let the wells completely dry at any time. Wash plate X2. |
| 7. | Add 0.1 ml of Biotin- detection antibody working solution into the above wells (standard, test sample & zero wells). Add the solution at the bottom of each well without touching the side wall. |
| 8. | Seal the plate with a cover and incubate at 37°C for 60 min. |
| 9. | Remove the cover, and wash plate 3 times with Wash buffer. Let wash buffer rest in wells for 1 min between each wash. |
| 10. | Add 0.1 ml of SABC working solution into each well, cover the plate and incubate at 37°C for 30 min. |
| 11. | Remove the cover and wash plate 5 times with Wash buffer, and each time let the wash buffer stay in the wells for 1-2 min. |
| 12. | Add 90 µl of TMB substrate into each well, cover the plate and incubate at 37°C in dark within 10-20 min. (Note: This incubation time is for reference use only, the optimal time should be determined by end user.) And the shades of blue can be seen in the first 3-4 wells (with most concentrated standard solutions), the other wells show no obvious color. |
| 13. | Add 50 µl of Stop solution into each well and mix thoroughly. The color changes into yellow immediately. |
| 14. | Read the O.D. absorbance at 450 nm in a microplate reader immediately after adding the stop solution. |
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. |
