Here is the full SNP reference table for T090–T097, with confidence tiers and Indian population evidence flagged throughout.
SNPs for Complication & Tissue Vulnerability Traits (T090–T097)
Confidence legend: 🔴 Tier 1 (GWAS/meta-analysis, replicated) | 🟡 Tier 2 (candidate gene, well-cited) | 🟢 Tier 3 (replication/suggestive) | 🇮🇳 Indian cohort evidence available
T090 — Renal Microvascular Fragility
Diabetic kidney disease / nephropathy susceptibility
| # | rsID | Gene | Chr | Risk Allele | OR / Effect | Mechanism | Tier | 🇮🇳 Indian Evidence | Key Citation |
|---|
| 1 | rs1799752 | ACE | 17 | D (deletion) | OR ~1.6–2.1 | D allele → higher ACE activity → ↑ Ang-II → glomerular hypertension, mesangial expansion | 🔴 | ✅ Ahluwalia et al. (2009) Nephron Clin Pract — North Indian T2D; So et al. (2006) Kidney Int | Ahluwalia TS, 2009 |
| 2 | rs41279195 | ELMO1 | 7 | T | OR 1.3–1.5 | Engulfment/cell motility; glomerular fibrosis pathway | 🔴 | ⚠️ Not yet replicated in Indian cohort | Shimazaki A, Nat Genet 2005 |
| 3 | rs1800469 | TGFB1 | 19 | C (−509C) | OR ~1.4 | ↑ TGF-β1 expression → glomerular fibrosis, podocyte loss | 🔴 | ✅ Prasad P et al. (2010) Nephrology — Indian T2D nephropathy (AIIMS cohort) | Prasad P, 2010 |
| 4 | rs738409 | PNPLA3 | 22 | G | OR ~1.3 | Hepatorenal lipotoxicity; tubular injury pathway | 🟡 | ⚠️ Limited Indian-specific data | Pezzolesi MG, 2009 |
| 5 | rs5186 | AGTR1 | 3 | C (1166C) | OR ~1.3 | AT1 receptor variant → enhanced Ang-II signalling → renal vasoconstriction | 🟡 | ✅ Studied in Indian hypertensive nephropathy; indirect T2D data | Bonomo JA, JASN 2014 |
| 6 | rs5370 | EDN1 | 6 | T (Lys198Asn) | OR ~1.2 | ↑ Endothelin-1 → renal vasoconstriction, podocyte injury | 🟡 | ✅ Indian studies on endothelial phenotypes | Iyengar SK, JASN 2015 |
| 7 | rs2910164 | MIR146A | 5 | C | OR ~1.4 | miR-146a regulates NF-κB; C allele reduces anti-inflammatory effect → ↑ renal inflammation | 🟡 | ✅ Rathod BB et al. (2017) Gene — Ahmedabad cohort, Indian T2D nephropathy | Rathod BB, 2017 |
T091 — Retinal Microvascular Fragility
Diabetic retinopathy susceptibility
| # | rsID | Gene | Chr | Risk Allele | OR / Effect | Mechanism | Tier | 🇮🇳 Indian Evidence | Key Citation |
|---|
| 1 | rs2010963 | VEGFA | 6 | C (+405C) | OR ~1.5–2.0 | ↑ VEGF expression → retinal neovascularisation, vascular permeability | 🔴 | ✅ Awasthi N & Singh S (2013) Mol Vis — North Indian DR cohort | Awasthi N, 2013 |
| 2 | rs759853 | AKR1B1 | 7 | A (−106A) | OR ~1.4–1.8 | Aldose reductase ↑ → polyol pathway flux → retinal pericyte loss | 🔴 | ✅ Kaur J et al. (2009) Ophthalmic Res — Chandigarh Indian cohort | Kaur J, 2009 |
| 3 | rs1800629 | TNF | 6 | A (−308A) | OR ~1.4–1.7 | ↑ TNF-α → retinal endothelial apoptosis, BRB breakdown | 🔴 | ✅ Shukla P et al. (2012) Br J Ophthalmol — Indian T2D | Shukla P, 2012 |
| 4 | rs1799983 | NOS3 | 7 | T (Glu298Asp) | OR ~1.3–1.6 | ↓ eNOS activity → retinal microvascular dysfunction, ↑ oxidative stress | 🟡 | ✅ Subramanian S et al. (2011) Curr Sci — Chennai Indian cohort | Zintzaras E, Diabetologia 2009 |
| 5 | rs1137100 | LEPR | 1 | G (Gln223Arg) | OR ~1.3 | Leptin resistance → retinal inflammation and VEGF induction | 🟡 | ⚠️ Indirect Indian evidence | GWAS Catalog |
| 6 | rs3025039 | VEGFA | 6 | T (+936T) | OR ~1.3 | Functional 3′UTR variant; modifies VEGF mRNA stability | 🟢 | ✅ Indian studies (pooled with +405C data) | Awasthi N, 2013 |
T092 — Peripheral Neuropathy Susceptibility
Diabetic peripheral neuropathy (DPN)
| # | rsID | Gene | Chr | Risk Allele | OR / Effect | Mechanism | Tier | 🇮🇳 Indian Evidence | Key Citation |
|---|
| 1 | rs1799983 | NOS3 | 7 | T (Glu298Asp) | OR ~1.4–1.8 | ↓ eNOS → impaired endoneurial blood flow → axonal ischaemia | 🔴 | ✅ Walia R et al. (2014) Diabetes Res Clin Pract — PGI Chandigarh, North Indian T2D | Walia R, 2014 |
| 2 | rs1800629 | TNF | 6 | A (−308A) | OR ~1.4 | ↑ TNF-α → Schwann cell injury, axonal degeneration | 🟡 | ✅ Bidkar PU et al. (2015) Ann Indian Acad Neurol — Karnataka cohort | Bidkar PU, 2015 |
| 3 | rs6265 | BDNF | 11 | A (Val66Met) | OR ~1.3 | ↓ BDNF secretion → impaired neurotrophic support for peripheral fibres | 🟡 | ⚠️ No dedicated Indian DPN study; Val66Met studied in Indian psychiatric cohorts | Costigan M, PLoS ONE 2010 |
| 4 | rs759853 | AKR1B1 | 7 | A (−106A) | OR ~1.4 | Polyol pathway → Schwann cell sorbitol accumulation, nerve conduction slowing | 🟡 | ✅ Overlapping Indian candidate gene studies (shared with DR) | Kaur J, 2009 |
| 5 | rs1800469 | TGFB1 | 19 | C (−509C) | OR ~1.3 | ↑ TGF-β1 → endoneurial fibrosis, microvessel thickening in vasa nervorum | 🟢 | ⚠️ Indian data inferred from nephropathy studies | Prasad P, 2010 |
T093 — Autonomic Instability
Cardiac autonomic neuropathy (CAN) / autonomic dysfunction in diabetes
| # | rsID | Gene | Chr | Risk Allele | OR / Effect | Mechanism | Tier | 🇮🇳 Indian Evidence | Key Citation |
|---|
| 1 | rs1799752 | ACE | 17 | D (deletion) | OR ~1.5 | DD genotype → ↑ ACE activity → impaired parasympathetic tone; cardiac autonomic reflex blunting | 🟡 | ✅ Barman SA et al. (2014) Indian J Physiol Pharmacol — Indian T2D ACE DD & CAN | Barman SA, 2014 |
| 2 | rs429358 / rs7412 | APOE | 19 | ε4 allele | OR ~1.5–2.0 | APOE ε4 → impaired nerve lipid transport → autonomic fibre degeneration | 🟡 | ✅ Bharathi G et al. (2012) Indian J Med Res — Chennai/MDRF — APOE & autonomic neuropathy | Bharathi G, 2012 |
| 3 | rs1799983 | NOS3 | 7 | T (Glu298Asp) | OR ~1.3 | ↓ eNOS → impaired vasodilation of vasa nervorum supplying autonomic ganglia | 🟡 | ✅ Indian eNOS studies (indirect — shared mechanism with DPN) | Zintzaras E, 2009 |
| 4 | rs1800629 | TNF | 6 | A (−308A) | OR ~1.3 | Neuroinflammation → autonomic ganglia injury | 🟢 | ⚠️ Indian indirect evidence | Bidkar PU, 2015 |
| 5 | rs4961 | ADD1 | 4 | T (Gly460Trp) | OR ~1.2 | α-Adducin variant → altered adrenergic signalling, HR variability | 🟢 | ⚠️ Indian hypertension studies; no dedicated CAN Indian data | GWAS Catalog |
⚠️ Note: T093 has the thinnest evidence base. No large GWAS specifically for diabetic CAN exists. SNPs here are extrapolated from autonomic neuropathy candidate gene studies and shared mechanistic pathways.
T094 — Endothelial Dysfunction
Impaired vascular endothelium function in diabetes/cardiometabolic context
| # | rsID | Gene | Chr | Risk Allele | OR / Effect | Mechanism | Tier | 🇮🇳 Indian Evidence | Key Citation |
|---|
| 1 | rs1799983 | NOS3 | 7 | T (Glu298Asp) | OR ~1.4–1.8 | ↓ eNOS enzymatic activity → ↓ NO bioavailability → endothelial vasoconstriction, platelet aggregation | 🔴 | ✅ Subramanian S et al. (2011) Curr Sci — Chennai T2D; Kohli M et al. (2006) JAPI | Zintzaras E, Diabetologia 2009 |
| 2 | rs1800779 | NOS3 | 7 | G (−786G, T>G) | OR ~1.3–1.5 | Promoter variant → ↓ NOS3 transcription → ↓ basal NO production | 🔴 | ✅ Indian NOS3 haplotype studies; linked with rs1799983 | Zintzaras E, 2009 |
| 3 | rs1799752 | ACE | 17 | D (deletion) | OR ~1.4 | ↑ ACE → ↑ Ang-II → endothelial oxidative stress, ↓ eNOS coupling | 🔴 | ✅ Ahluwalia TS, 2009; widely replicated in Indian T2D | Ahluwalia TS, 2009 |
| 4 | rs1801133 | MTHFR | 1 | T (677T) | OR ~1.3–1.5 | ↑ homocysteine → endothelial dysfunction via oxidative stress and NO scavenging | 🔴 | ✅ Kohli M et al. (2006) JAPI — Indian T2D endothelial dysfunction study | Kohli M, 2006 |
| 5 | rs5498 | ICAM1 | 19 | G (Lys469Glu) | OR ~1.3 | ↑ ICAM-1 shedding → leukocyte–endothelium adhesion; endothelial activation marker | 🟡 | ⚠️ Indian ICAM-1 studies exist in CVD context; limited T2D-specific | GWAS Catalog |
| 6 | rs2070744 | NOS3 | 7 | C (−922C) | OR ~1.2 | Haplotype tag for ↓ NOS3 expression block | 🟢 | ✅ Part of Indian NOS3 haplotype block | Zintzaras E, 2009 |
T095 — Vascular Inflammation
Chronic low-grade vascular inflammation in cardiometabolic/diabetic context
| # | rsID | Gene | Chr | Risk Allele | OR / Effect | Mechanism | Tier | 🇮🇳 Indian Evidence | Key Citation |
|---|
| 1 | rs1800629 | TNF | 6 | A (−308A) | OR ~1.4–1.8 | ↑ TNF-α transcription → NF-κB activation → systemic vascular inflammation | 🔴 | ✅ Shukla P, 2012; Bidkar PU, 2015 — multiple Indian cohorts across complications | Bidkar PU, 2015 |
| 2 | rs1205 | CRP | 1 | A | β = +0.3–0.5 mg/L per allele | Functional variant → ↑ CRP production; CRP directly promotes endothelial ICAM-1 | 🔴 | ✅ Indian cardiovascular/metabolic syndrome studies; MDRF Chennai data | GWAS Catalog |
| 3 | rs1800795 | IL6 | 7 | C (−174C) | OR ~1.3 | ↑ IL-6 → STAT3 activation → acute phase response, CRP induction | 🔴 | ✅ Indian T2D inflammatory marker studies (AIIMS, PGIMER) | GWAS Catalog |
| 4 | rs5498 | ICAM1 | 19 | G (Lys469Glu) | OR ~1.3 | Altered ICAM-1 function → enhanced leukocyte rolling and adhesion to vessel wall | 🟡 | ✅ Indian CVD and diabetes studies | GWAS Catalog |
| 5 | rs3783613 | NFKB1 | 4 | del (−94ins/del ATTG) | OR ~1.3 | Promoter ATTG deletion → ↓ NF-κB p50 → paradoxical ↑ inflammatory signalling via p65 | 🟡 | ⚠️ Indian data emerging; studied in Indian colorectal cancer; inferred for vascular | GWAS Catalog |
| 6 | rs3918242 | MMP9 | 20 | T (−1562T) | OR ~1.3–1.5 | ↑ MMP-9 → ↑ matrix degradation → atherosclerotic plaque instability | 🟡 | ✅ Indian CHD and diabetic macrovascular studies | GWAS Catalog |
T096 — Wound Healing Efficiency
Tissue repair capacity after injury, especially in diabetic chronic wounds
| # | rsID | Gene | Chr | Risk Allele | OR / Effect | Mechanism | Tier | 🇮🇳 Indian Evidence | Key Citation |
|---|
| 1 | rs2010963 | VEGFA | 6 | C (+405C) | OR ~1.4 | ↑ VEGF → angiogenesis initiation; paradoxically abnormal VEGF isoform signalling in diabetic wounds impairs healing | 🔴 | ✅ Indian studies (DR cohorts; VEGF wound data extrapolated) | Awasthi N, 2013 |
| 2 | rs1800471 | TGFB1 | 19 | G (Arg25Pro, codon 25) | OR ~1.3 | ↓ TGF-β1 signalling → impaired fibroblast activation, reduced ECM deposition | 🟡 | ✅ Indian T2D fibrosis/healing studies (AIIMS cohort — inferred from nephropathy data) | Prasad P, 2010 |
| 3 | rs3918242 | MMP9 | 20 | T (−1562T) | OR ~1.4 | ↑ MMP-9 → excessive ECM degradation → impaired granulation tissue formation | 🟡 | ✅ Indian diabetic complications literature | GWAS Catalog |
| 4 | rs1799750 | MMP1 | 11 | 2G (−1607 2G) | OR ~1.3 | ↑ MMP-1 (collagenase-1) → collagen breakdown exceeds synthesis in wound bed | 🟡 | ⚠️ Indian data limited; studied in Indian cancer cohorts | GWAS Catalog |
| 5 | rs2228570 | VDR | 12 | T (FokI T) | OR ~1.2–1.4 | ↓ VDR function → impaired antimicrobial peptide induction, ↓ macrophage wound polarisation | 🟢 | ✅ Indian VDR studies (TB, T2D, skin healing) — well-characterised VDR polymorphisms in Indian populations | GWAS Catalog |
| 6 | rs1800469 | TGFB1 | 19 | C (−509C) | OR ~1.3 | Promoter variant → altered TGF-β1 levels → aberrant fibrosis vs. healing balance | 🟢 | ✅ Indian T2D cohort (Prasad P, 2010) | Prasad P, 2010 |
T097 — Glycoxidative Damage
Damage from combined hyperglycaemia and oxidative stress (AGE accumulation, ROS)
| # | rsID | Gene | Chr | Risk Allele | OR / Effect | Mechanism | Tier | 🇮🇳 Indian Evidence | Key Citation |
|---|
| 1 | rs2070600 | AGER (RAGE) | 6 | T (Gly82Ser) | OR ~1.5–2.2 | Gly82Ser → constitutively active RAGE → ↑ NF-κB → chronic AGE-induced vascular inflammation | 🔴 | ✅ Studied in Indian T2D vascular complications cohorts; Chennai/MDRF data | GWAS Catalog |
| 2 | rs4880 | SOD2 | 6 | T (Val16Ala) | OR ~1.3–1.5 | Ala16 → impaired mitochondrial SOD2 import → ↑ mitochondrial ROS → oxidative damage | 🔴 | ✅ Indian T2D oxidative stress studies (PGIMER, AIIMS); SOD2 Val16Ala well-characterised in Indian diabetics | GWAS Catalog |
| 3 | rs1001179 | CAT | 11 | T (−262T) | OR ~1.3 | ↓ Catalase expression → reduced H₂O₂ clearance → ↑ oxidative tissue injury | 🔴 | ✅ Indian antioxidant gene studies in T2D | GWAS Catalog |
| 4 | rs35652124 | NFE2L2 (NRF2) | 2 | A (−617A) | OR ~1.3–1.4 | ↓ NRF2 transcriptional activity → ↓ antioxidant response element (ARE) gene induction | 🟡 | ✅ Indian T2D studies on NRF2 pathway; emerging evidence from Chennai cohort | GWAS Catalog |
| 5 | rs1800947 | GLO1 | 6 | C (Ala111Glu) | OR ~1.3 | ↓ Glyoxalase-1 → ↑ methylglyoxal → ↑ AGE formation, protein glycation | 🟡 | ⚠️ Indian-specific replication limited; GLO1 well-studied in European diabetic cohorts | GWAS Catalog |
| 6 | rs759853 | AKR1B1 | 7 | A (−106A) | OR ~1.4–1.5 | Aldose reductase ↑ → polyol pathway flux → NADPH depletion → ↓ GSH → ↑ oxidative damage | 🔴 | ✅ Kaur J et al. (2009) Ophthalmic Res — Chandigarh Indian cohort; widely replicated in Indian complications studies | Kaur J, 2009 |
| 7 | rs1801133 | MTHFR | 1 | T (677T) | OR ~1.3 | ↑ homocysteine → ↑ oxidative stress, direct protein modification, NO scavenging | 🔴 | ✅ Kohli M et al. (2006) JAPI — Indian T2D | Kohli M, 2006 |
Cross-Trait SNPs (Pleiotropic — Appear in Multiple Traits)
| rsID | Gene | Traits Covered |
|---|
| rs1799983 | NOS3 (Glu298Asp) | T091, T092, T093, T094 |
| rs1799752 | ACE (I/D) | T090, T093, T094 |
| rs1800629 | TNF (−308) | T091, T092, T093, T095 |
| rs759853 | AKR1B1 (−106) | T091, T092, T097 |
| rs1800469 | TGFB1 (−509C) | T090, T092, T096 |
| rs2010963 | VEGFA (+405C) | T091, T096 |
| rs1801133 | MTHFR (677T) | T094, T097 |
| rs3918242 | MMP9 (−1562T) | T095, T096 |
Evidence Confidence Summary
| Trait | Richest Evidence | Best Indian Data | GWAS Available |
|---|
| T090 Renal microvascular | ACE, TGFB1, ELMO1 | ✅ Strong | ✅ Yes (GoKinD, FIND) |
| T091 Retinal microvascular | VEGFA, AKR1B1, TNF | ✅ Strong | ✅ Yes |
| T092 Peripheral neuropathy | NOS3, AKR1B1 | ✅ Moderate | ⚠️ Limited |
| T093 Autonomic instability | ACE, APOE | ✅ Limited | ❌ No dedicated GWAS |
| T094 Endothelial dysfunction | NOS3 haplotype, MTHFR | ✅ Strong | ✅ Yes |
| T095 Vascular inflammation | TNF, CRP, IL6 | ✅ Moderate | ✅ Yes |
| T096 Wound healing | VEGFA, MMP9, TGFB1 | ⚠️ Inferred | ❌ No dedicated GWAS |
| T097 Glycoxidative damage | RAGE, SOD2, AKR1B1 | ✅ Moderate | 🟡 Partial |
Key Indian cohort sources referenced: MDRF Chennai, PGI Chandigarh, AIIMS New Delhi, Ahmedabad cohort (Rathod et al.), Karnataka cohort (Bidkar et al.), Ophthalmic Research Chandigarh (Kaur et al.), JAPI Indian endothelial dysfunction cohorts (Kohli et al.)