# Diabetic Nephropathy

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> url: https://mymerci.kr/pages/nclex_q.php?qn_id=491197  
> language: ko  
> subject: Nursing

## 문제

Diabetic Nephropathy

## 보기

1. Diabetic kidney disease **✔ 정답**
2. Diabetic retinopathy
3. Diabetic neuropathy
4. Chronic kidney disease
5. Hypertensive nephropathy

**정답: 1**

## 해설

Diabetic nephropathy is a complication of diabetes mellitus in which kidney function is progressively damaged.
Diabetic: derived from diabetes; Nephropathy: nephro- (kidney) + -pathy (disease) — a combining form denoting kidney disease

## 심화 해설

Rationale

The English term Diabetic Nephropathy corresponds to diabetic kidney disease. It is one of the microvascular complications of diabetes mellitus, in which chronic hyperglycemia damages the glomeruli and renal tubules.

Incorrect Options

Diabetic retinopathy refers to retinal involvement and diabetic neuropathy to nerve involvement; each is a distinct microvascular complication affecting a different organ system. Chronic kidney disease (CKD) is a broader diagnosis for which diabetic kidney disease is a leading cause, but the two terms are not synonymous. Hypertensive nephropathy denotes kidney damage caused by chronic hypertension rather than by diabetes.

Pathophysiology of Diabetic Kidney Disease

Several mechanisms act together in the development of diabetic kidney disease. The most critical early change is podocyte injury. Podocytes are epithelial cells that wrap around the glomerular basement membrane and serve as the final barrier preventing filtration of blood proteins through the slit diaphragm formed between their foot processes. Research shows that in the diabetic state, glomerular expression of a protein called PTPRO (Protein Tyrosine Phosphatase Receptor Type O) is significantly reduced [1]. Loss of PTPRO activates the c-Abl/p53 signaling pathway, promoting podocyte apoptosis and decreasing expression of nephrin and podocin, the key structural proteins of the slit diaphragm [1]. As a result, the glomerular filtration barrier breaks down and albuminuria develops.

In addition, the metabolic derangements of hyperglycemia produce lipotoxicity and oxidative stress. Palmitic acid, a free fatty acid, is particularly lipotoxic to glomerular mesangial cells, driving cell injury and fibrosis [4]. The FGF21 (Fibroblast Growth Factor 21)–SIRT1 axis has been identified as protective in this process [4].

Tubular injury also contributes importantly to disease progression. Recent work demonstrates that the complement protein C1QA (Complement Component C1q A Chain) promotes tubular epithelial cell injury under high-glucose conditions by mediating endoplasmic reticulum stress (ERS) [3]. Endoplasmic reticulum stress triggers the unfolded protein response, leading to cellular dysfunction and apoptosis.

Clinical Application and Nursing Care

Diabetic kidney disease is asymptomatic early on, so detection at the microalbuminuria stage with aggressive intervention is essential. Studies indicate that diabetic kidney disease is an early complication of diabetes and that renoprotective mechanisms exist independent of glycemic control [2]. Cafestol activates the Keap1-Nrf2 axis to strengthen antioxidant defenses, attenuating renal oxidative stress, inflammation, fibrosis, and apoptosis without directly affecting blood glucose levels [2]. This suggests that glycemic control alone may not adequately protect the kidneys and that additional strategies such as oxidative stress management are needed.

In clinical practice, routine monitoring of the urine albumin-to-creatinine ratio (UACR) and estimated glomerular filtration rate (eGFR) is essential. Because the risk of chronic kidney disease rises in patients with type 2 diabetes who have a higher body mass index (BMI), weight management and lifestyle modification are central to prevention [4].References (research sources)

- [1]Upregulation of PTPRO by WT1 alleviates podocyte injury in diabetic nephropathy through inhibiting the c-Abl/p53 pathway.Research articleGuo H, Wang L, Tong Y, Jiang Y, Yao X, Lu L, Wei R. (2026) · DOI: 10.1007/s00018-026-06343-6

- [2]Cafestol ameliorates diabetic nephropathy via Keap1-Nrf2 axis activation: A novel renoprotective mechanism independent of glycemic control.Research articleSinan NA, Almujaydil MS. (2026) · DOI: 10.1371/journal.pone.0349192

- [3]Single-cell-based analysis establishes C1QA-mediated promotion of high glucose-induced tubular epithelial injury via ERS in DN.Research articleZhang X, Li L, Zhang F, Zhu M, Kang Z, Mao Y. (2026) · DOI: 10.1016/j.gene.2026.150259

- [4]The factors between BMI and diabetic nephropathy and protective role of the FGF21-SIRT1 axis in diabetic nephropathy.Research articleLiu C, Zhang Q, Zhang Y. (2026) · DOI: 10.1007/s11010-026-05617-8

## 임상 시나리오

Early Detection and Management of Diabetic Kidney DiseaseImportance of Microalbuminuria Screening
Because diabetic kidney disease is asymptomatic early on, annual microalbuminuria screening should begin 5 years after diagnosis in type 1 diabetes and at the time of diagnosis in type 2 diabetes.

Aggressive intervention at the albuminuria stage can slow progression, so RAAS blockade (ACEi/ARB) should be considered along with glycemic control.

CautionBecause microalbuminuria can rise transiently with exercise, fever, or urinary tract infection, confirm the finding with 2 or more repeat tests within 3 to 6 months.

## 핵심 개념

- **Diabetic kidney disease** — A microvascular complication of diabetes in which chronic hyperglycemia damages the glomeruli and renal tubules
- **Microalbuminuria** — Excretion of very small amounts of albumin in the urine; the earliest clinical marker of diabetic kidney disease
- **Podocyte** — An epithelial cell wrapping the glomerular basement membrane that forms the final barrier to protein filtration via the slit diaphragm between its foot processes
- **Endoplasmic reticulum stress** — A state in which accumulated misfolded proteins lead to cellular dysfunction and apoptosis
- **Glomerular mesangial cell** — A supporting cell between glomerular capillaries and a primary target of lipotoxic injury and fibrosis in diabetes

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