Abstract
Accelerating cases of diabetes worldwide have given rise to higher incidences of diabetic complications. MiRNAs, a much-explored class of non-coding RNAs, play a significant role in the pathogenesis of diabetes mellitus by affecting insulin release, β-cell proliferation, and dysfunction. Besides, disrupted miRNAs contribute to various complications, diabetic retinopathy, nephropathy, and neuropathy as well as severe conditions like diabetic foot. MiRNAs regulate various processes involved in diabetic complications like angiogenesis, vascularization, inflammations, and various signaling pathways like PI3K, MAPK, SMAD, and NF-KB signaling pathways. Diabetic neuropathy is the most common diabetic complication, characterized mainly by pain and numbness, especially in the legs and feet. MiRNAs implicated in diabetic neuropathy include mir-9, mir-106a, mir-146a, mir-182, miR-23a and b, miR-34a, and miR-503. The diabetic foot is the most common diabetic neuropathy, often leading to amputations. Mir-203, miR-23c, miR-145, miR-29b and c, miR-126, miR-23a and b, miR-503, and miR-34a are associated with diabetic foot. This review has been compiled to summarize miRNA involved in initiation, progression, and miRNAs affecting various signaling pathways involved in diabetic neuropathy including the diabetic foot. Besides, potential applications of miRNAs as biomarkers and therapeutic targets in this microvascular complication will also be discussed.
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Abbreviations
- DM:
-
Diabetes mellitus
- CHD:
-
Coronary heart disease
- CVAs:
-
Cerebrovascular accidents
- BMR:
-
Basal metabolic rate
- IRAK1:
-
Interleukin-1 receptor-activated kinase
- RAF6:
-
Tumor necrosis factor receptor-associated factor-6
- PDN:
-
Painful diabetic neuropathy
- CALHM1:
-
Calcium homeostasis modulator 1
- KCC2:
-
K + Cl- cotransporter 2
- GABA:
-
Gamma-aminobutyric acid
- CCI:
-
Chronic constriction sciatic nerve injury
- NP:
-
Neuropathic pain
- STAT3:
-
Signal transducer and activator of transcription 3
- SOCS1:
-
Suppressor of cytokine signaling 1
- HMGB1:
-
High-mobility group box 1
- MDA:
-
Malondialdehyde
- VCAM-1:
-
Vascular cell adhesion molecule-1
- GPX:
-
Glutathione peroxidase
- SOD:
-
Superoxide dismutase
- MDT:
-
Maggot debridement therapy
- SDF-1α:
-
Stromal cell-derived factor-1α
- FBN1:
-
Fibrillin 1
- DFU:
-
Diabetic foot ulcer
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Funding
Council of Scientific and Industrial Research (CSIR), New Delhi, is acknowledged for Senior Research Fellowship (SRF) to P.K. for Ph.D. Declarations. DST-FIST grant (SR/FST/LS-I/2017/49) to department of Human Genetics and Molecular Medicine, Central University of Punjab is acknowledged with thanks.
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The idea of the article was framed by PK, SK, SS, and AM. Literature was searched by PK and AM, and data analysis was done by PK, SK, and SS. The draft was jointly prepared by PK, SK, SS, and AM. It was critically revised by AM and SS.
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Key Points
(a) Diabetic neuropathy is the most common microvascular complication affecting at least 50% of diabetic patients.
(b) MiRNAs have been reported to play a key role in vascularization, angiogenesis, inflammation, various signaling cascades, and other mechanisms that contribute to oxidative and nitrative stress and, thus, diabetic neuropathy.
(c) With promising findings and lesser side effects, miRNA can be investigated as a therapeutic target for the complication.
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Kaur, P., Kotru, S., Singh, S. et al. Role of miRNAs in diabetic neuropathy: mechanisms and possible interventions. Mol Neurobiol 59, 1836–1849 (2022). https://doi.org/10.1007/s12035-021-02662-w
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DOI: https://doi.org/10.1007/s12035-021-02662-w