Human IgM ELISA Kit
Contents
1. for up to 30 days at 2 8 C e Standard Curve Reconstitute the 500 ng 105 mU of Human IgM Standard with 5 ml of MIX Diluent to generate a 100 ng ml 21 mU ml standard stock solution Allow the standard to sit for 10 minutes with gentle agitation prior to making dilutions Prepare duplicate or triplicate standard points by serially diluting the standard stock solution 100 ng ml 1 2 with MIX Diluent to produce 50 25 12 5 6 25 3 125 and 1 563 ng ml solutions MIX Diluent serves as the zero standard 0 ng ml Any remaining solution should be frozen at 20 C and used within 30 days Standard mer lgM Point Dilution ng ml P1 1 part Standard 100 ng ml 100 0 1 part P1 1 part MIX Diluent 50 00 10 50 1 part P2 1 part MIX Diluent 25 00 5 250 Pa 1partP3 1 part MIX Diluent 1250 2625 Ps 1partP5 1 part MIX Diluent 3 125 0 656 Ps MiXDiluent 0 000 0 000 e Biotinylated Human IgM Antibody 60x Spin down the antibody briefly and dilute the desired amount of the antibody 1 60 with MIX Diluent Any remaining solution should be frozen at 20 C e Wash Buffer Concentrate 20x If crystals have formed in the concentrate mix gently until the crystals have completely dissolved Dilute the Wash Buffer Concentrate 1 20 with reagent grade water e SP Conjugate 100x Spin down the SP Conjugate briefly and dilute the desired amount of the conjugate 1 100 with MIX Diluent Any remaining solution should be2. frozen at 20 C Assay Procedure e Prepare all reagents standard solutions and samples as instructed Bring all reagents to room temperature before use The assay is performed at room temperature 20 25 C e Remove excess microplate strips from the plate frame and return them immediately to the foil pouch with desiccants inside Reseal the pouch securely to minimize exposure to water vapor and store in a vacuum desiccator e Add 50 ul of Human IgM Standard or sample per well Cover wells with a sealing tape and incubate for 2 hours Start the timer after the last addition e Wash five times with 200 ul of Wash Buffer manually Invert the plate each time and decant the contents hit 4 5 times on absorbent material to completely remove the liquid If using a machine wash six times with 300 ul of Wash Buffer and then invert the plate decanting the contents hit 4 5 times on absorbent material to completely remove the liquid e Add 50 ul of Biotinylated Human IgM Antibody to each well and incubate for 1 hour e Wash the microplate as described above e Add 50 ul of Streptavidin Peroxidase Conjugate to each well and incubate for 30 minutes Turn on the microplate reader and set up the program in advance e Wash the microplate as described above e Add 50 ul of Chromogen Substrate per well and incubate for 25 minutes or till the optimal blue color density develops Gently tap plate to ensure thorough mixing and break the bubbles in th
3. healthy adults were tested n 40 On average IgM level was 1 4 mg ml Sample Average Value mg ml Human Pooled Normal Plasma 1 4 Human Normal Plasma 1 2 Human Pooled Normal Serum 1 7 Performance Characteristics e Kit standard has been calibrated against WHO International Standard e The minimum detectable dose of IgM as calculated by 25D from the mean of a zero standard was established to be 0 6 ng ml e Intra assay precision was determined by testing replicates of three plasma samples in one assay e inter assay precision was determined by testing three plasma samples in twenty assays Intra Assay Precision Inter Assay Precision Sample 1 2 3 1 2 3 n 20 20 20 20 20 20 CV Average CV Recovery Standard Added Value 4 40 ng ml Recovery 93 105 Average Recovery 97 Linearity e Plasma and serum samples were serially diluted to test for linearity Average Percentage of Expected Value Sample Dilution Plasma Serum 1 30000 89 88 1 60000 99 97 1 120000 106 104 Cross Reactivity Species Cross Reactivity Canine None Bovine None Monkey lt 5 Mouse None Rat None Swine None Rabbit None Human 100 Immunoglobulins Cross Reactivity IgM 100 IgA None IgA1 None IgA2 None lgG1 1 lgG2 None 1863 1 lgG4 1 lgD 2 IgE None Troublesho
4. 0 x g for 10 minutes Dilute samples 1 200 into MIX Diluent or within the range of 1 50 to 1 800 and assay Depending on application needs user should determine proper dilutions The undiluted samples can be stored at 80 C for up to 3 months Avoid repeated freeze thaw cycles Refer to Sample Dilution Guidelines below for further instruction Guidelines for Dilutions of 1 100 or Greater for reference only please follow the insert for specific dilution suggested 1 100 1 10000 A 4 ul sample 396 ul buffer 100x 100 fold dilution Assuming the needed volume is less than or equal to 400 ul 4 ul sample 396 ul buffer 100x 4 ul of A 396 ul buffer 100x 10000 fold dilution Assuming the needed volume is less than or equal to 400 ul 1 1000 1 100000 4 ul sample 396 ul buffer 100x 24 ul of A 216 ul buffer 10x 1000 fold dilution Assuming the needed volume is less than or equal to 240 ul 4 ul sample 396 ul buffer 100x 4 ul of A 396 ul buffer 100x 24 ul of B 216 ul buffer 10x 100000 fold dilution Assuming the needed volume is less than or equal to 240 ul Reagent Preparation e Freshly dilute all reagents and bring all reagents to room temperature before use e _ MIX Diluent Concentrate 10x If crystals have formed in the concentrate mix gently until the crystals have completely dissolved Dilute the MIX Diluent Concentrate 1 10 with reagent grade water Store
5. 10 minutes and remove serum Dilute samples 1 60000 into MIX Diluent and assay or within the range of 1 30000 to 1 120000 and assay Depending on application needs user should determine proper dilutions The undiluted samples can be stored at 20 C or below for up to 3 months Avoid repeated freeze thaw cycles e Urine Collect urine using sample pot Centrifuge samples at 800 x g for 10 minutes Dilute samples 1 4 into MIX Diluent or within the range of 1 2 to 1 20 and assay Depending on application needs user should determine proper dilutions The undiluted samples can be stored at 20 C or below for up to 3 months Avoid repeated freeze thaw cycles e Saliva Collect saliva using sample tube Centrifuge samples at 800 x g for 10 minutes Dilute samples 1 200 into MIX Diluent or within the range of 1 100 to 1 400 and assay Depending on application needs user should determine proper dilutions The undiluted samples can be stored at 20 C or below for up to 3 months Avoid repeated freeze thaw cycles e Milk Collect milk using sample tube Centrifuge samples at 800 x g for 10 minutes Dilute samples 1 2000 into MIX Diluent or within the range of 1 1000 to 1 4000 and assay Depending on application needs user should determine proper dilutions The undiluted samples can be stored at 20 C or below for up to 3 months Avoid repeated freeze thaw cycles e CSF Collect cerebrospinal fluid CSF using sample pot Centrifuge samples at 300
6. MA assarbro AssayMax Human IgM ELISA Kit Assaypro LLC 3400 Harry S Truman Blvd St Charles MO 63301 T 636 447 9175 F 636 395 7419 WWW assaypro com For any questions regarding troubleshooting or performing the assay please contact our support team at support assaypro com Thank you for choosing Assaypro Assay Summary Step 1 Add 50 ul of Standard or Sample per well Incubate 2 hours Step 2 Wash then add 50 ul of Biotinylated Antibody per well Incubate 1 hour Step 3 Wash then add 50 ul of SP Conjugate per well Incubate 30 minutes Step 4 Wash then add 50 ul of Chromogen Substrate per well Incubate 25 minutes Step 5 Add 50 ul of Stop Solution per well Read at 450 nm immediately Symbol Key BE Consult instructions for use Assay Template 12 11 10 Human Immunoglobulin M IgM ELISA Kit Catalog No El7301 1 Sample insert for reference use only Introduction Human immunoglobulin M IgM is a large mushroom shaped antibody against A and B antigens on red blood cells and is produced by B cells 1 It forms a pentamer or a hexamer in serum and also a monomer on B cell surface Each of the five monomers has a molecular mass of 180 kDa consists of two light and two heavy chains and a joining J chain required for the synthesis of the pentamer 2 3 Upon an exposure to an acute infection IgM is the pr
7. e suggested in this insert However the user should determine the optimal dilution factor e Spin down the SP conjugate vial and the biotinylated antibody vial before opening and using contents e The Stop Solution is an acidic solution e The kit should not be used beyond the expiration date Reagents e Human IgM Microplate A 96 well polystyrene microplate 12 strips of 8 wells coated with a polyclonal antibody against IgM e Sealing Tapes Each kit contains 3 precut pressure sensitive sealing tapes that can be cut to fit the format of the individual assay e Human IgM Standard Human IgM in a buffered protein base 500 ng lyophilized e Biotinylated Human IgM Antibody 60x A 60 fold concentrated biotinylated polyclonal antibody against human IgM 100 pl e _ MIX Diluent Concentrate 10x A 10 fold concentrated buffered protein base 30 ml e Wash Buffer Concentrate 20x A 20 fold concentrated buffered surfactant 30 ml 2 bottles e Streptavidin Peroxidase Conjugate SP Conjugate A 100 fold concentrate 80 ul e Chromogen Substrate A ready to use stabilized peroxidase chromogen substrate tetramethylbenzidine 8 ml e Stop Solution A 0 5 N hydrochloric acid to stop the chromogen substrate reaction 12 ml Storage Condition e Upon arrival immediately store components of the kit at recommended temperatures up to the expiration date e Store SP Conjugate and Biotinylated Antibody at 20 C e Store Microp
8. e well with pipette tip e Add 50 ul of Stop Solution to each well The color will change from blue to yellow e Read the absorbance on a microplate reader at a wavelength of 450 nm immediately If wavelength correction is available subtract readings at 570 nm from those at 450 nm to correct optical imperfections Otherwise read the plate at 450 nm only Please note that some unstable black particles may be generated at high concentration points after stopping the reaction for about 10 minutes which will reduce the readings Data Analysis e Calculate the mean value of the duplicate or triplicate readings for each standard and sample e To generate a standard curve plot the graph using the standard concentrations on the x axis and the corresponding mean 450 nm absorbance on the y axis The best fit line can be determined by regression analysis using log log or four parameter logistic curve fit e Determine the unknown sample concentration from the Standard Curve and multiply the value by the dilution factor Standard Curve e The curve is provided for illustration only A standard curve should be generated each time the assay is performed Human IgM Standard Curve 1 0F OD 450 nm 0 1 1 1 1 0 10 0 100 0 hIgM ng ml Human IgM Standard Curve OD 450 nm 0 1 10 100 100 0 hlgM mU ml Reference Value e Normal human IgM plasma levels range from 0 4 to 2 3 mg ml e Human plasma and serum samples from
9. edominant antibody produced to fight the foreign red blood cell antigen It activates complement and agglutinates red blood cells IgM is the first immunoglobulin made by the fetus and by B cells when stimulated by antigens 4 5 It does not pass across the human placenta due to its large size 6 8 Principle of the Assay The AssayMax Human Immunoglobulin M IgM ELISA Enzyme Linked Immunosorbent Assay kit is designed for detection of human IgM in plasma serum urine saliva milk CSF and cell culture samples This assay employs a quantitative sandwich enzyme immunoassay technique that measures human IgM in less than 4 hours A polyclonal antibody specific for human IgM has been pre coated onto a 96 well microplate with removable strips IgM in standards and samples is sandwiched by the immobilized polyclonal antibody and biotinylated polyclonal antibody specific for human IgM which is recognized by a streptavidin peroxidase conjugate All unbound material is washed away and a peroxidase enzyme substrate is added The color development is stopped and the intensity of the color is measured Caution and Warning e This product is for Research Use Only and is Not For Use In Diagnostic Procedures Prepare all reagents working diluent buffer wash buffer standard biotinylated antibody and SP conjugate as instructed prior to running the assay e Prepare all samples prior to running the assay The dilution factors for the samples ar
10. late Diluent Concentrate 10x Wash Buffer Stop Solution and Chromogen Substrate at 2 8 C e _ Unused microplate wells may be returned to the foil pouch with the desiccant packs and resealed May be stored for up to 30 days in a vacuum desiccator e Diluent 1x may be stored for up to 30 days at 2 8 C e Store Standard at 2 8 C before reconstituting with Diluent and at 20 C after reconstituting with Diluent Other Supplies Required e Microplate reader capable of measuring absorbance at 450 nm Pipettes 1 20 ul 20 200 200 1000 ul and multiple channel e Deionized or distilled reagent grade water Sample Collection Preparation and Storage e Cell Culture Supernatants Centrifuge cell culture media at 3000 x g for 10 minutes to remove debris Collect supernatants and assay Store samples at 20 C or below Avoid repeated freeze thaw cycles e Plasma Collect plasma using one tenth volume of 0 1 M sodium citrate as an anticoagulant Centrifuge samples at 3000 x g for 10 minutes Dilute samples 1 60000 into MIX Diluent or within the range of 1 30000 to 1 120000 and assay Depending on application needs user should determine proper dilutions The undiluted samples can be stored at 20 C or below for up to 3 months Avoid repeated freeze thaw cycles EDTA or Heparin can also be used as an anticoagulant e Serum Samples should be collected into a serum separator tube After clot formation centrifuge samples at 3000 x g for
11. oting Causes Course of Action Low Precision Use of expired components e Check the expiration date listed before use e Do not interchange components from different lots Improper wash step e Check that the correct wash buffer is being used e Check that all wells are dry after aspiration e Check that the microplate washer is dispensing properly e If washing by pipette check for proper pipetting technique Splashing of reagents while loading wells e Pipette properly in a controlled and careful manner Inconsistent volumes loaded into wells e Pipette properly in a controlled and careful manner e Check pipette calibration e Check pipette for proper performance Insufficient mixing of reagent dilutions e Thoroughly agitate the lyophilized components after reconstitution e Thoroughly mix dilutions Improperly sealed microplate e Check the microplate pouch for proper sealing e Check that the microplate pouch has no punctures e Check that three desiccants are inside the microplate pouch prior to sealing a ce oo 72 lt E e wn 2 a E mo w E o w Q x c gt Microplate was left unattended between steps e Each step of the procedure should be performed uninterrupted Omission of step e Consult the provided procedure for complete list of steps Steps performed in incorrect order e Consult the provided procedure for the cor
12. rect order Insufficient amount of reagents added to wells e Check pipette calibration e Check pipette for proper performance Wash step was skipped e Consult the provided procedure for all wash steps Improper wash buffer e Check that the correct wash buffer is being used Improper reagent preparation e Consult reagent preparation section for the correct dilutions of all reagents Insufficient or prolonged incubation periods e Consult the provided procedure for correct incubation time Deficient Standard Curve Fit Non optimal sample dilution e Sandwich ELISA If samples generate OD values higher than the highest standard point P1 dilute samples further and repeat the assay e Competitive ELISA If samples generate OD values lower than the highest standard point P1 dilute samples further and repeat the assay e User should determine the optimal dilution factor for samples Contamination of reagents e A new tip must be used for each addition of different samples or reagents during the assay procedure Contents of wells evaporate e Verify that the sealing film is firmly in place before placing the assay in the incubator or at room temperature Improper pipetting e Pipette properly in a controlled and careful manner e Check pipette calibration e Check pipette for proper performance e Thoroughly agitate the lyophilized components after reconstit
13. ution e Thoroughly mix dilutions Insufficient mixing of reagent dilutions References 1 Czajkowsky DM and Shao Z 2009 Proc Natl Acad Sci USA 106 35 14960 14965 2 Niles MJ et al 1995 Proc Natl Acad Sci USA 92 7 2884 2888 3 Vangelista L et al 2002 Protein Engineering 15 1 51 57 4 Morgan Capner P et al 1985 Prenat Diagn 5 1 21 26 5 Asma GE et al 1984 Clin Exp Immunol 56 2 407 414 6 Clemens JM et al 1992 Blood 79 1 169 172 7 Thomas HC et al 1978 Clin Exp Immunol 31 150 157 8 Mendel Hartvig et al 1987 Int Arch Allergy App Immunol 83 3 265 270 Version 2 2R Related Products El7201 1 AssayMax Human Immunoglobulin G3 ELISA Kit Plasma Serum Urine Milk Saliva and Cell Culture samples El7001 1 AssayMax Human Immunoglobulin A ELISA Kit Plasma Serum Urine Milk Saliva and Cell Culture samples El7200 1 AssayMax Human Immunoglobulin G ELISA Kit Plasma Serum Urine Milk Saliva and Cell Culture samples El7800 1 AssayMax Human Immunoglobulin D ELISA Kit Plasma Serum Urine Milk Saliva and Cell Culture samples www assaypro com e e mail Support assaypro com
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