Lipid abnormalities and association with atopic allergic diseases

1. A method of diagnosing and treating an allergic disease in an asymptomatic subject, comprising:

a. obtaining at least one stratum corneum non-lesional skin sample from an asymptomatic subject, wherein the at least one skin sample is obtained by a skin tape stripping method;

b. determining the levels and/or relative percentages of lysophosphatidylcholine 24:0-LPC and short chain molecular species of at least one lipid selected from the group consisting of sphingomyelin 18:0-SM, and lysophosphatidylcholines 14:0-LPC, 16:0-LPC, and 18:0-LPC in the at least one skin sample obtained by a skin tape stripping method and normalizing the levels and/or relative percentages to total protein content in the same at least one skin sample;

c. comparing the normalized levels and/or relative percentages of the short chain molecular species of the at least one lipid in the at least one skin sample obtained by a skin tape stripping method to the same short chain molecular species of the at least one lipid from a healthy control sample obtained by a skin tape stripping method;

d. comparing the normalized levels and/or relative percentages of lysophosphatidylcholine 24:0-LPC in the at least one skin sample to lysophosphatidylcholine 24:0-LPC from a healthy control sample;

e. identifying the subject as having an allergic disease selected from atopic dermatitis and eczema when:

i. the normalized levels and/or relative percentages of short chain molecular species of the at least one lipid from the at least one skin sample are elevated as compared to the normalized levels and/or relative percentages of the same short chain molecular species of the at least one lipid from the healthy control sample; and

ii. the normalized levels and/or relative percentages of lysophosphatidylcholine 24:0-LPC from the at least one skin sample are decreased as compared to the normalized levels and/or relative percentages of lysophosphatidylcholine 24:0-LPC from the healthy control sample; and

f. administering an effective amount of a therapeutic to the subject identified as having an allergic disease selected from atopic dermatitis and eczema prior to development of symptoms, wherein the administration of the therapeutic delays the onset of symptoms of the allergic disease in the subject and/or reduces the severity of the allergic disease symptoms in the subject.

2. The method of claim 1 , wherein the allergic disease is atopic dermatitis.

3. The method of claim 1 , wherein the step of determining the levels and/or relative percentages of lysophosphatidylcholine 24:0-LPC and the short chain molecular species of the at least one lipid is by a method comprising mass-spectrometry.

4. The method of claim 1 , further comprising determining the expression level of each of elongation of long chain fatty acids family member 1 (ELOVL1), elongation of long chain fatty acids family member 3 (ELOVL3), elongation of long chain fatty acids family member 4 (ELOVL4), and elongation of long chain fatty acids family member 6 (ELOVL6) in the at least one skin sample and in the healthy control sample.

5. The method of claim 1 , wherein the therapeutic is selected from the group consisting of a moisturizer, an anti-inflammatory, a modifier of an enzyme of lipid metabolism, a long chain fatty acid derivative and combinations thereof.

6. The method of claim 1 , wherein the method further comprises administration of a different therapeutic as compared to the therapeutic administered in step f.