Overview

  • Product name

    Human Prealbumin ELISA Kit
    See all Prealbumin kits
  • Detection method

    Colorimetric
  • Precision

    Intra-assay
    Sample n Mean SD CV%
    Overall 5 4.6%
    Inter-assay
    Sample n Mean SD CV%
    Overall 4 8.4%
  • Assay type

    Sandwich (quantitative)
  • Sensitivity

    6.3 pg/ml
  • Range

    12.5 pg/ml - 800 pg/ml
  • Recovery

    Sample specific recovery
    Sample type Average % Range
    Cell culture supernatant 107 101% - 119%
    Milk 103 98% - 108%
    Serum 95 92% - 99%
    Heparin Plasma 101 98% - 104%
    EDTA Plasma 89 80% - 99%
    Citrate Plasma 100 99% - 100%
    Cerebral Spinal Fluid 100 95% - 107%

  • Assay time

    1h 30m
  • Assay duration

    One step assay
  • Species reactivity

    Reacts with: Human
    Does not react with: Mouse, Rat, Cow
  • Product overview

    Prealbumin in vitro SimpleStep ELISA® (Enzyme-Linked Immunosorbent Assay) kit is designed for the quantitative measurement of Prealbumin protein in human serum, plasma, milk, cerebrospinal fluid, and cell culture supernatant samples.


    The SimpleStep ELISA® employs an affinity tag labeled capture antibody and a reporter conjugated detector antibody which immunocapture the sample analyte in solution. This entire complex (capture antibody/analyte/detector antibody) is in turn immobilized via immunoaffinity of an anti-tag antibody coating the well. To perform the assay, samples or standards are added to the wells, followed by the antibody mix. After incubation, the wells are washed to remove unbound material. TMB substrate is added and during incubation is catalyzed by HRP, generating blue coloration. This reaction is then stopped by addition of Stop Solution completing any color change from blue to yellow. Signal is generated proportionally to the amount of bound analyte and the intensity is measured at 450 nm. Optionally, instead of the endpoint reading, development of TMB can be recorded kinetically at 600 nm.


    Prealbumin (Transthyretin, or TTR) is a transport protein for thyroxine and retinol-binding protein bound to retinol. Prealbumin forms a dimer of dimers, and misfolding of it is associated with various amyloid diseases. Prealbumin levels are an indication of protein-calorie nutrition and have been used to monitor the effectiveness of parenteral nutrition.

  • Tested applications

    Suitable for: Sandwich ELISAmore details
  • Platform

    Pre-coated microplate (12 x 8 well strips)

Properties

  • Storage instructions

    Store at +4°C. Please refer to protocols.
  • Components 1 x 96 tests
    10X Human Prealbumin Capture Antibody 1 x 600µl
    10X Human Prealbumin Detector Antibody 1 x 600µl
    Human Prealbumin Lyophilized Recombinant Protein 2 vials
    Antibody Diluent 5BI 1 x 6ml
    10X Wash Buffer PT (ab206977) 1 x 20ml
    TMB Development Solution 1 x 12ml
    Stop Solution 1 x 12ml
    Sample Diluent NS 1 x 100ml
    SimpleStep Pre-Coated 96-Well Microplate (ab206978) 1 unit
    Plate Seals 1 unit
  • Research areas

  • Function

    Thyroid hormone-binding protein. Probably transports thyroxine from the bloodstream to the brain.
  • Tissue specificity

    Detected in serum and cerebrospinal fluid (at protein level). Highly expressed in choroid plexus epithelial cells. Detected in retina pigment epithelium and liver.
  • Involvement in disease

    Defects in TTR are the cause of amyloidosis transthyretin-related (AMYL-TTR) [MIM:105210]. A hereditary generalized amyloidosis due to transthyretin amyloid deposition. Protein fibrils can form in different tissues leading to amyloid polyneuropathies, amyloidotic cardiomyopathy, carpal tunnel syndrome, systemic senile amyloidosis. The disease includes leptomeningeal amyloidosis that is characterized by primary involvement of the central nervous system. Neuropathologic examination shows amyloid in the walls of leptomeningeal vessels, in pia arachnoid, and subpial deposits. Some patients also develop vitreous amyloid deposition that leads to visual impairment (oculoleptomeningeal amyloidosis). Clinical features include seizures, stroke-like episodes, dementia, psychomotor deterioration, variable amyloid deposition in the vitreous humor.
    Defects in TTR are a cause of hyperthyroxinemia dystransthyretinemic euthyroidal (HTDE) [MIM:145680]. It is a condition characterized by elevation of total and free thyroxine in healthy, euthyroid persons without detectable binding protein abnormalities.
    Defects in TTR are a cause of carpal tunnel syndrome type 1 (CTS1) [MIM:115430]. It is a condition characterized by entrapment of the median nerve within the carpal tunnel. Symptoms include burning pain and paresthesias involving the ventral surface of the hand and fingers which may radiate proximally. Impairment of sensation in the distribution of the median nerve and thenar muscle atrophy may occur. This condition may be associated with repetitive occupational trauma, wrist injuries, amyloid neuropathies, rheumatoid arthritis.
  • Sequence similarities

    Belongs to the transthyretin family.
  • Domain

    Each monomer has two 4-stranded beta sheets and the shape of a prolate ellipsoid. Antiparallel beta-sheet interactions link monomers into dimers. A short loop from each monomer forms the main dimer-dimer interaction. These two pairs of loops separate the opposed, convex beta-sheets of the dimers to form an internal channel.
  • Cellular localization

    Secreted. Cytoplasm.
  • Information by UniProt
  • Alternative names

    • Amyloid polyneuropathy
    • Amyloidosis I
    • ATTR
    • Carpal tunnel syndrome 1
    • CTS
    • CTS1
    • Dysprealbuminemic euthyroidal hyperthyroxinemia
    • Dystransthyretinemic hyperthyroxinemia
    • Epididymis luminal protein 111
    • HEL111
    • HsT2651
    • PALB
    • Prealbumin
    • Prealbumin amyloidosis type I
    • Prealbumin Thyroxine-binding
    • Senile systemic amyloidosis
    • TBPA
    • Thyroxine binding prealbumin
    • Transthyretin
    • TTHY_HUMAN
    • TTR
    • TTR protein
    see all
  • Database links

Associated products

Applications

Our Abpromise guarantee covers the use of ab231920 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
Sandwich ELISA Use at an assay dependent concentration.

Images

  • SimpleStep ELISA technology allows the formation of the antibody-antigen complex in one single step, reducing assay time to 90 minutes. Add samples or standards and antibody mix to wells all at once, incubate, wash, and add your final substrate. See protocol for a detailed step-by-step guide.

     

  • Background-subtracted data values (mean +/- SD) are graphed.

  • The concentrations of Prealbumin were measured in duplicates, interpolated from the Prealbumin standard curves and corrected for sample dilution. Undiluted samples are as follows: serum 1: 400,000, plasma (citrate) 1: 400,000, plasma (heparin) 1: 400,000, and plasma (EDTA) 1: 400,000. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean Prealbumin concentration was determined to be 273 µg/mL in serum, 220 µg/mL in plasma (citrate), 216 µg/ml in plasma (heparin), and 210 µg/ml in plasma (EDTA).

  • The concentrations of Prealbumin were measured in duplicates, interpolated from the Prealbumin standard curves and corrected for sample dilution. Undiluted samples are as follows: HepG2 supernatant 1: 500, milk 1: 5,000, and CSF 1: 500,000. The interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean Prealbumin concentration was determined to be 0.3 µg/mL in HepG2 supernatant, 2.7 µg/ml in milk, and 20 µg/ml in cerebrospinal fluid.

  • Interpolated dilution factor corrected values are plotted (mean +/- SD, n=2). The mean Prealbumin concentration was determined to be 594 µg/mL with a range of 303 – 1217 µg/mL.

Protocols

References

ab231920 has not yet been referenced specifically in any publications.

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