Human CD5L / CT 2 ELISA Kit PicoKine® (96 Tests). Quantitate Human CD5L in cell culture supeatants, cell lysates, serum and plasma (heparin, EDTA). Sensitivity: 10pg/ml. The brand Picokine indicates this is a premium quality ELISA kit. Each Picokine kit delivers precise quantification, high sensitivity, and excellent reproducibility. Only our most reliable and effective kits qualify as Picokine, guaranteeing top-tier results for your assays.
There is no detectable cross-reactivity with other relevant proteins.
Specificity
Natural and recombinant human CD5L
Subcellular Localization
Secreted . Cytoplasm . Secreted by macrophages and circulates in the blood (PubMed:24223991, PubMed:24804991). Transported in the cytoplasm via CD36-mediated endocytosis (By similarity). .
Cell culture supeatants: add activating reagent pro rate, i.e. add 20?l of Solution A into 40?l of sample, 10 min later, add 20?l of Solution B. PH7.0-7.6.
Serum: add activating reagent pro rate, i.e. add 20?l of Solution A into 40?l of sample, 10 min later, add 20?l of Solution B. PH7.0-7.6. Prior to the assay, the activated sample requires a 2000-fold dilution. Add 10?l of activated sample into 390?l wash buffer (1 : 40). And then add 4?l of above diluted reagent into 196?l sample diluent buffer ( 1 : 50).
Plasma(heparin, EDTA): add activating reagent pro rate, i.e. add 20?l of Solution A into 40?l of sample, 10 min later, add 20?l of Solution B. PH7.0-7.6. Prior to the assay, the activated sample requires a 4000-fold dilution. Add 10?l of activated sample into 790?l wash buffer (1 : 80). And then add 4?l of above diluted reagent into 196?l sample diluent buffer (1 : 50).Optimal dilutions should be determined by end users.
It is unnecessary to activate the recombinant CD5L.
Sample was diluted partly after adding activating reagent, so please pay attention to this when calculate target protein concentration.
Anticoagulant
heparin or EDTA
Activating Reagent
CD5 combines with its ligand (CD5L) to form complex in samples. Free CD5L needs to be released by activation. Solution A: 1N HCI: add 8.33ml of 12N HCI into 91.67ml of H2O. Solution B: 1.2N NaOH/0.5M HEPES: add 12ml of 10N NaOH and 11.9g HEPES into 75ml of H2O, add H2O to adjust volume to 100ml.
Precision
Intra-Assay Precision
Inter-Assay Precision
Sample
1
2
3
1
2
3
n
16
16
16
24
24
24
Mean (pg/ml)
245
1172
5450
224
1288
5192
Standard deviation
10.04
79.69
414.2
13.21
91.44
415.36
CV (%)
4.1%
6.8%
7.6%
5.9%
7.1%
8%
Protein Function
Secreted protein that acts as a key regulator of lipid synthesis: mainly expressed by macrophages in lymphoid and inflammed tissues and regulates mechanisms in inflammatory responses, such as infection or atherosclerosis. Able to inhibit lipid droplet size in adipocytes. Following incorporation into mature adipocytes via CD36-mediated endocytosis, associates with cytosolic FASN, inhibiting fatty acid synthase activity and leading to lipolysis, the degradation of triacylglycerols into glycerol and free fatty acids (FFA). CD5L-induced lipolysis occurs with progression of obesity: participates to obesity-associated inflammation following recruitment of inflammatory macrophages into adipose tissues, a cause of insulin resistance and obesity- related metabolic disease. Regulation of intracellular lipids mediated by CD5L has a effect on transcription regulation mediated by nuclear receptors ROR-gamma (RORC). Acts as a key regulator of metabolic switch in T-helper Th17 cells. Regulates the expression of pro-inflammatory genes in Th17 cells by altering the lipid content and limiting synthesis of cholesterol ligand of RORC, the master transcription factor of Th17-cell differentiation. CD5L is mainly present in non-pathogenic Th17 cells, where it decreases the content of polyunsaturated fatty acyls (PUFA), affecting two metabolic proteins MSMO1 and CYP51A1, which synthesize ligands of RORC, limiting RORC activity and expression of pro-inflammatory genes. Participates in obesity- associated autoimmunity via its association with IgM, interfering with the binding of IgM to Fcalpha/mu receptor and enhancing the development of long-lived plasma cells that produce high-affinity IgG autoantibodies (By similarity). Also acts as an inhibitor of apoptosis in macrophages: promotes macrophage survival from the apoptotic effects of oxidized lipids in case of atherosclerosis (PubMed:24295828). Involved in early response to microbial infection against various pathogens by acting as a patte recognition receptor and by promoting autophagy (PubMed:16030018, PubMed:24223991, PubMed:24583716, PubMed:25713983). .
Background
CD5 antigen-like, also known as Sp alpha and AIM, is a protein that in humans is encoded by the CD5L gene. It is mapped to 1q21-q23 by fluorescence in situ hybridization. It is found that Aim expression is induced in mouse macrophages in response to loading with highly oxidized low density lipoprotein (oxLDL), and that Aim is expressed in foam cells within atherosclerotic lesions. Both the expression of Aim in lesions and its induction by oxLDL require Lxr /Rxr heterodimers. Aim-null macrophages are highly susceptible to oxLDL-induced apoptosis in vitro and undergo accelerated apoptosis in atherosclerotic lesions in vivo. Double knockout of Aim and Ldlr reduce atherosclerotic lesions. Therefore, it is concluded that AIM expression protects macrophages from apoptosis within atherosclerotic lesions, promoting early lesion development.
Reproducibility
Lots
Lot 1 (pg/ml)
Lot 2 (pg/ml)
Lot 3 (pg/ml)
Lot 4 (pg/ml)
Mean (pg/ml)
Standard Deviation
CV (%)
Sample 1
245
242
250
244
245
2.94
1.2%
Sample 2
1172
1254
1148
1193
1191
39.3
3.2%
Sample 3
5450
5193
4994
5419
5264
184.77
3.5%
*number of samples for each test n=16.
Notes
Material Required But Not Provided: Microplate Reader capable of reading absorbance at 450nm. Incubator. Automated plate washer . Pipettes and pipette tips capable of precisely dispensing 0.5 µl through 1 ml volumes of aqueous solutions. Multichannel pipettes are recommended for large amount of samples. Deionized or distilled water. 500ml graduated cylinders. Test tubes for dilution.
Gene ID
922
Gene Name
CD5L
UniProt ID
O43866
Protein Name
CD5 antigen-like
Tissue Specificity
Expressed in spleen, lymph node, thymus, bone marrow, and fetal liver, but not in non-lymphoid tissues. .
Sequence
Contains 3 SRCR domains.
Applications
ELISA
Research Area
Apoptosis,Cell Biology,Intracellular
Storage
Store at 4°C for 6 months, at -20°C for 12 months. Avoid multiple freeze-thaw cycles (Ships with gel ice, can store for up to 3 days in room temperature. Freeze upon receiving.)