The Human p-Tau217 (Phospho-Tau 217) ELISA Kit is specially designed for the precise measurement of phospho-tau 217 levels in human biological samples, including serum, plasma, and cell culture supernatants. This kit offers exceptional sensitivity and specificity, ensuring accurate and consistent results for a variety of research applications.Phospho-tau 217 is a critical biomarker linked to neurodegenerative diseases such as Alzheimer's disease, where abnormal tau protein phosphorylation is a key pathological feature.
Monitoring phospho-tau 217 levels can aid in understanding disease progression, identifying potential therapeutic targets, and developing new treatment strategies.With its reliable performance and broad utility, the Human p-Tau217 ELISA Kit is an invaluable tool for researchers investigating neurodegenerative disorders and seeking to advance our understanding of tau protein biology.
p-tau217 ELISA Kit allows for the in vitro quantitative determination of p-tau217 concentrations in serum, plasma, tissue homogenates and other biological fluids.
Sensitivity:
< 4.688pg/ml
Range:
7.813-500pg/ml
Storage:
2-8°C for 6 months
Note:
For Research Use Only
Recovery:
Matrices listed below were spiked with certain level of p-tau217 and the recovery rates were calculated by comparing the measured value to the expected amount of p-tau217 in samples.
Matrix
Recovery range(%)
Average(%)
serum(n=5)
94-100
97
EDTA plasma(n=5)
87-104
97
heparin plasma(n=5)
85-101
90
Linearity:
The linearity of the kit was assayed by testing samples spiked with appropriate concentration of p-tau217 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.
Sample
1:2
1:4
1:8
serum(n=5)
86-102%
85-99%
88-102%
EDTA plasma(n=5)
89-99%
86-99%
86-98%
heparin plasma(n=5)
88-100%
88-99%
91-99%
CV(%):
Intra-Assay: CV<8% Inter-Assay: CV<10%
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.
Yadikar, H.A. et al.
Early cerebrospinal fluid elevations of pTau-217 in severe traumatic brain injury subjects
