Open AccessSerum lipidomic determinants of human diabetic neuropathy in type 2 diabetes
Author(s) -
Afshinnia Farsad,
Reynolds Evan L.,
Rajendiran Thekkelnaycke M.,
Soni Tanu,
Byun Jaeman,
Savelieff Masha G.,
Looker Helen C.,
Nelson Robert G.,
Michailidis George,
Callaghan Brian C.,
Pennathur Subramaniam,
Feldman Eva L.
Publication year - 2022
Publication title -
annals of clinical and translational neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.824
H-Index - 42
ISSN - 2328-9503
DOI - 10.1002/acn3.51639
Subject(s) - medicine , type 2 diabetes , body mass index , diabetes mellitus , dyslipidemia , peripheral neuropathy , diabetic neuropathy , cohort , obesity , gastroenterology , cohort study , endocrinology
Objective The serum lipidomic profile associated with neuropathy in type 2 diabetes is not well understood. Obesity and dyslipidemia are known neuropathy risk factors, suggesting lipid profiles early during type 2 diabetes may identify individuals who develop neuropathy later in the disease course. This retrospective cohort study examined lipidomic profiles 10 years prior to type 2 diabetic neuropathy assessment. Methods Participants comprised members of the Gila River Indian community with type 2 diabetes ( n = 69) with available stored serum samples and neuropathy assessment 10 years later using the combined Michigan Neuropathy Screening Instrument (MNSI) examination and questionnaire scores. A combined MNSI index was calculated from examination and questionnaire scores. Serum lipids (435 species from 18 classes) were quantified by mass spectrometry. Results The cohort included 17 males and 52 females with a mean age of 45 years (SD = 9 years). Participants were stratified as with (high MNSI index score > 2.5407) versus without neuropathy (low MNSI index score ≤ 2.5407). Significantly decreased medium‐chain acylcarnitines and increased total free fatty acids, independent of chain length and saturation, in serum at baseline associated with incident peripheral neuropathy at follow‐up, that is, participants had high MNSI index scores, independent of covariates. Participants with neuropathy also had decreased phosphatidylcholines and increased lysophosphatidylcholines at baseline, independent of chain length and saturation. The abundance of other lipid classes did not differ significantly by neuropathy status. Interpretation Abundance differences in circulating acylcarnitines, free fatty acids, phosphatidylcholines, and lysophosphatidylcholines 10 years prior to neuropathy assessment are associated with neuropathy status in type 2 diabetes.