Human Phospho Tau (P181) ELISA Kit- High Sensitivity

Description

Description

Human Phospho Tau (P181) ELISA Kit

Phospho Tau refers to a specific form of tau protein that has undergone phosphorylation, a process in which phosphate groups are added to the protein molecule. Tau proteins are primarily found in the human brain and are essential for the normal functioning of nerve cells. However, abnormal phosphorylation of tau has been linked to several neurodegenerative disorders, including Alzheimer's disease and other tauopathies. The Assay Genie Human Phospho Tau (P181) ELISA Kit is a highly sensitive assay for the quantitative measurement of P181 in serum, plasma, cell and tissue lysates.

Datasheet MSDS

Key Features

	Save Time	Pre-coated 96 well plate
	Quick Start	Kit includes all necessary reagents
	Publication Ready	Reproducible and reliable results

Overview


Product Name:	Human Phospho Tau (P181) ELISA Kit
Product Code:	HUFI03189
Size:	96 Assays
Alias:	Phospho Tau, P181
Detection Method:	Sandwich ELISA, Double Antibody
Application:	This immunoassay kit allows for the in vitro quantitative determination of Human Phospho Tau concentrations in serum plasma and other biological fluids.
Sensitivity:	4.688pg/ml
Range:	7.813-500pg/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Additional Information


Recovery	Matrices listed below were spiked with certain level of Human Phospho Tau and the recovery rates were calculated by comparing the measured value to the expected amount of Human Phospho Tau in samples. Enquire for more information.
Linearity	The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human Phospho Tau and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected. Enquire for more information.
CV(%)	Intra-Assay: CV<8% Inter-Assay: CV<10%

Kit Components

Component	Quantity	Storage
ELISA Microplate (Dismountable)	8x12 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 (Protection 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 (Protection from light)
Stop Solution	10ml	4°C
Wash Buffer (25X)	30ml	4°C
Plate Sealer	5	-

Other materials 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

Protein Information

Heading 1	Heading 2
UniProt	P10636
NCBI GenInfo Identifier	6754638
NCBI Gene ID	4137
Molecular Weight	46kDa
Protein Family	Tautomerase

Protocol

*Note: Protocols are specific to each batch/lot. For the exact 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	Procedure
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.

Sample Type

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.

P181 Background

Phospho Tau Background

Phospho Tau refers to the phosphorylated form of tau protein, which plays a crucial role in the normal functioning of nerve cells. Tau phosphorylation is tightly regulated, but abnormal phosphorylation has been implicated in various neurodegenerative diseases, including Alzheimer's disease. P181 is an epitope specific to a specific phosphorylation site on the tau protein. The P181 epitope corresponds to the phosphorylation of threonine residue 181. Measurement of Phospho Tau at the P181 site is of particular interest in the field of neurodegeneration research and clinical diagnostics.

Phospho Tau Importance

The importance of Phospho Tau (P Tau) lies in its association with various neurodegenerative diseases, particularly Alzheimer's disease (AD) and other tauopathies. P Tau has emerged as a valuable biomarker for the diagnosis and detection of neurodegenerative diseases. Increased levels of P Tau in cerebrospinal fluid (CSF) and other biological samples have been observed in individuals with AD and other tauopathies. Its measurement can aid in the early identification and differentiation of these conditions from other forms of dementia. Abnormal phosphorylation of tau protein leads to the formation of tau tangles, a characteristic neuropathological hallmark of neurodegenerative diseases. P Tau is specifically implicated in the aggregation and accumulation of tau into these neurofibrillary tangles, leading to neuronal dysfunction and degeneration. Understanding the role of P Tau in the pathogenesis of these diseases is crucial for developing targeted therapies and intervention.

P181 ELISA Kit FAQs

What is the Phospho Tau ELISA Kit used for?

Phospho Tau ELISA kits are commonly employed in scientific studies to investigate the role of phosphorylated tau in neurodegenerative diseases such as Alzheimer's disease, frontotemporal dementia, and progressive supranuclear palsy. Researchers can use the ELISA kit to measure Phospho Tau levels in biological samples like cerebrospinal fluid (CSF) or brain tissue, enabling them to study disease mechanisms, identify potential biomarkers, and assess disease progression.

What are the advantages of using the Phospho Tau ELISA Kit?

The Phospho Tau ELISA Kit offers several advantages, including high sensitivity, accuracy, and reproducibility. It provides a user-friendly and reliable method to quantify Phospho Tau levels in biological specimens, allowing for precise measurements and robust data analysis.

What sample types are compatible with Phospho Tau ELISA Kit?

The Phospho Tau ELISA Kit is compatible with various sample types, including serum, plasma, cell lysates, and tissue homogenates. It provides flexibility in sample selection, allowing researchers to analyze Phospho Tau levels in different biological matrices.

What are the storage requirements with Phospho Tau ELISA Kit?

The Phospho Tau ELISA Kit components should be stored according to the instructions provided in the kit manual. Generally, it is recommended to store the kit components at the recommended temperature to ensure their stability and optimal performance.

What should I do if my assay results are not optimal?

If you encounter any issues or have suboptimal assay results, we recommend contacting our dedicated support team for assistance. They will be available to provide troubleshooting guidance, answer your questions, and ensure you achieve the best possible results with the Phospho Tau ELISA Kit.

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Human Phospho Tau (P181) ELISA Kit

Description