ObjectiveTo analyze the correlation between the sarcopenia index (the ratio of creatinine to cystatin C, CCR) and the severity of chronic obstructive pulmonary disease (COPD), and evaluate its potential value as an indicator for auxiliary diagnosis of COPD and assessment of disease severity. Methods A total of 315 patients who underwent pulmonary function tests at Tongren People's Hospital from January 2022 to December 2022 were selected. Among them, 180 patients were diagnosed with COPD, and 135 patients were non-COPD. The COPD group was further divided into GOLD1 group (mild, n=36), GOLD2 group (moderate, n=70), and GOLD3 group (severe, n=74) according to Chronic Obstructive Lung Disease (GOLD) classification. The clinical data, laboratory indicators, and pulmonary function test results of the patients were collected. Correlation analysis was used to explore the correlation between CCR and clinical data. Binary logistic regression analysis was used to explore the influencing factors of COPD. A receiver operating characteristic curve was drawn, and the area under the curve (AUC) was calculated to evaluate the predictive value of CCR for COPD. ResultsAmong the 315 enrolled patients, the prevalence of COPD was 57.14% (180/315). The CCR level of the COPD patients was significantly lower than that of the non-COPD patients. The more severe the condition of COPD patients, the lower the CCR value. The results of Spearman correlation analysis showed that CCR was significantly positively correlated with diffusion capacity of the lung for carbon monoxide, forced expiratory volume in the first second (FEV1) as a percentage of predicted value, FEV1/forced vital capacity, albumin, eosinophils, endogenous creatinine clearance rate, low-density lipoprotein cholesterol, and haemoglobin, and significantly negatively correlated with C-reactive protein, D-dimer, age, and neutrophil to lymphocyte ratio (all P<0.05). Binary logistic regression showed that after adjusting for other relevant factors, CCR was found to be an independent risk factor for the occurrence of COPD (OR=0.902, 95%CI 0.879 - 0.925, P<0.05). When the CCR value was 77.450, the AUC was 0.841 (95%CI 0.798 - 0.885), with a sensitivity of 60.7% and a specificity of 96.1%.ConclusionCCR is closely related to the disease condition and its severity in patients with stable-phase COPD, and it is an independent influencing factor for the occurrence of COPD.
目的 測定多發性骨髓瘤（MM）患者血清胱抑素C （Cys-C） 的水平，探討Cys-C與國際分期體系（ISS）、血β2-微球蛋白、溶骨性損害等指標的關系。 方法 收集2008年1月－2010年9月32例初治和8例復發的MM患者作為研究對象，同時收集40例健康體檢者的檢查資料作為對照組，測定血清Cys-C、血肌酐（Scr）、血β2-微球蛋白。采用核素全身骨顯像（ECT）觀察患者的溶骨性病變部位數。 結果 患者血清Cys-C水平（1.40 mg/L）明顯高于健康對照組（0.90 mg/L）（P＜0.01）；在MM患者中Cys-C比Scr更敏感，能反映腎小球濾過率；血清Cys-C水平與ISS分期晚，血β2-微球蛋白升高以及溶骨性病變進展密切相關。 結論 MM患者的Cys-C水平高于健康者。Cys-C是骨髓瘤腎損害的早期敏感標志物，與腫瘤負荷及溶骨性損害密切相關，可作為評價腫瘤負荷的潛在指標。Objective To evaluate the serum levels of cystatin-C in patients with multiple myeloma (MM), and to explore its possible correlations with clinical data, including ISS stage, serum β2-microglobulin, and advanced lytic lesions. Methods From January 2008 to September 2010, serum cystatin-C, creatinine (Scr), and β2-microglobulin in 32 patients with MM, 8 patients with relapsed disease, and in 40 healthy controls were detected by automatic biochemistry analyzer detection. According to skeleton ECT, grading of osteolytic lesion was observed. Results The levels of serum cystatin-C of patients with MM were significantly higher than those of the controls. Serum cystatin-C could reflect the glomerular filtration rate , and was more sensitive than Scr in patients with renal lesion. Serum cystatin-C had ber correlations with advanced ISS stages, high levels of serum β2-microglobulin, and extensive bone diseases. Conclusion Serum cystatin-C is a sensitive marker of renal lesion in patients with MM, it could be a potential indicator to assess the tumor burden.
ObjectiveTo observe and evaluate the predictive value of serum cystatin C (Cys-C) on the risk of sight-threatening diabetic retinopathy (STDR). MethodsA non-randomized controlled cross-sectional clinical study. Ninety-two patients with type 2 diabetes mellitus (T2DM) who were admitted to Department of Ophthalmology of Beijing Tsinghua Changgung Hospital from January 2022 to October 2022 were included in the study. Among them, 50 were male, 42 cases were female, with the mean age of (58.24±12.49) years. The mean duration of T2DM was (13.18±8.35) years, of which 38 cases had a duration of ≥10 years. Twenty-nine cases complicated with hypertension, of which 16 cases had a duration of ≥10 years. Seventeen cases complicated with chronic kidney disease stage 2 and 23 cases were treated with lipid-lowering drugs. Hemoglobin Alc, serum Cys-C, serum lipids and renal function were tested, and urinary microalbumin/creatinine ratio (ACR) was calculated. According to the 2003 American Academy of Ophthalmology "Clinical Guidelines for Diabetic Retinopathy (DR)" and international clinical DR severity grading standards, the patients were divided into STDR and non-STDR groups, with 44 and 48 cases in each group, respectively. STDR was defined as severe non-proliferative DR, proliferative DR, and macular edema. Logistic regression was used to analyze the independent risk factors of STDR in T2DM patients. Receiver operating characteristic curve (ROC curve) was used to calculate and analyze the area under ROC curve (AUC) and the predictive value of serum Cys-C and ACR in predicting STDR in T2DM patients. ResultsSerum Cys-C levels in STDR and non-STDR groups were 1.10 (0.94, 1.28) and 0.91 (0.83, 1.02) mg/L, respectively, with ACR of 4.29 (1.05, 21.89) and 1.39 (0.77, 3.80) mg/mmol, respectively. Compared with non-STDR group, serum Cys-C and ACR in STDR group were higher, and the difference was statistically significant (Z=－3.984, －3.280; P＜0.05). Multivariate logistic regression analysis showed that serum Cys-C was an independent risk factor for STDR (odds ratio=1.337, 95% confidence interval 1.145-2.090, P=0.033), and the risk of STDR increased by 33.7% for every 0.1 mg/L increase in serum Cys-C. ROC analysis results showed that serum Cys-C＞1.065 mg/L combined with ACR＞5.84 mg/mmol predicted the AUC of STDR in T2DM patients was 0.661, with the specificity of 95.8%. ConclusionsThe high serum Cys-C level is an independent risk factor for STDR in T2DM patients. Serum Cys-C has high predictive value for the occurrence of STDR.
【摘要】 目的 探討老年糖尿病患者血清胱抑素C與血脂及高敏C反應蛋白的關系。 方法 2008年5月-2009年10月糖尿病患者共141例，其中糖尿病合并癥組68例，單純糖尿病組73例；另選取對照組51例。對入選者的血清胱抑素C、血脂及高敏C反應蛋白進行分析。 結果 老年男女糖尿病合并癥組血清胱抑素C、高敏C反應蛋白、總膽固醇、甘油三酯及低密度脂蛋白膽固醇最高、高密度脂蛋白膽固醇最低，與對照組比較有統計學意義（Plt;0.05）、與單純糖尿病組比較，無統計學意義（Pgt;0.05）。老年男女單純糖尿病組高敏C反應蛋白、總膽固醇、甘油三酯高于對照組，組間比較，有統計學意義（Plt;0.05）。老年男女單純糖尿病組血清胱抑素C與對照組比較，無統率學意義（Pgt;0.05）。老年女性單純糖尿病組低密度脂蛋白膽固醇與對照組比較，有統計學意義（Plt;0.05）。老年男性糖尿病二組與對照組血清胱抑素C低于老年女性糖尿病二組與對照組，組間比較，無統計學意義（Pgt;0.05）。老年男性糖尿病患者血清胱抑素C與高敏C反應蛋白及血脂不相關。老年女性糖尿病合并癥組血清胱抑素C與空腹血糖正相關；單純糖尿病組血清胱抑素C與高密度脂蛋白膽固醇負相關、與低密度脂蛋白膽固醇正相關、與高敏C反應蛋白不相關。 結論 老年糖尿病患者高脂、高糖及低度炎癥狀態下，血清胱抑素C水平較高。血脂對血清胱抑素C的影響可能存在性別差異。隨著動脈粥樣硬化的加重，血清胱抑素C有升高趨勢。【Abstract】 Objective To investigate the relationship between serum cystatin C concentration and lipid, hs-C reactive protein in the elderly with diabetes. Methods A total of 192 senile people form May 2008 to October 2009 were investigated. There were 141 patients with diabetes, in whom 68 were with cardiovascular and cor, cerebrovascular diseases, 73 were with diabetes only.There were 51 control subjects. The data of serum cystatin C, hs-CRP, TC, TG, HDL-C and LDL-C were analyzed. Results Serum cystatin C of elderly men was lower than that in elderly women, but no signifcant correlation between them was found (Pgt;0.05). Serum cystatin C, hs-CRP, TC, TG and LDL-C was higher, and HDL-C was lower in male and female diabetes subjects with cardiovascular and cor, cerebrovascullar diseases, than that in control subjects (Plt;0.05). Serum hs-CRP, TC and TG were higher in the elderly with diabetes only, than that in control subjects (Plt;0.05). LDL-C was higher in senile women with diabetes only, than that in female control subjects (Plt;0.05). Serum cystatin C with LDL-C in elderly women with diabetes only, with FPG in female diabetes subjects with cardiovascular and cor, cerebrovascular diseases had position correlation (Plt;0.05). No correlation were observed between serum cystatin C and hs-CRP in male and female diabetes subjects, and lipid in male diabetes subjects. Conclusions We speculate that high serum lipid, high glucose and low level of inflammation may result in increasing of serum cystatin C in senily people with diabetes. The influence of serum lipid on serum cystatin C may be different in male and female senile people.Along with atherosclerotic aggravating, the level of serum cystatin C was increasing.
ObjectiveTo evaluate the screening performance of commonly used renal function indicators for chronic kidney disease (CKD) in subjects of different ages, so as to explore the appropriate screening regimen for Chinese population.MethodsA total of 2 131 adult subjects in Sichuan Orthopaedic Hospital or Mianyang Central Hospital from May 2016 to October 2017 were selected. They were divided into three groups according to age: group A (18–39 years, n=278), group B (40–64 years, n=1 167), and group C (≥65 years, n=686). Serum levels of creatinine (SCr), urea, and cystatin C [CysC; to calculate estimated glomerular filtration rate (eGFR) based on this index], as well as urine levels of albumin, total protein and creatinine were measured, and urine albumin to creatinine ratio (ACR) and urine protein to creatinine ratio (PCR) were calculated respectively. CKD was diagnosed according to the Kidney Disease: Improving Global Outcomes (KDIGO) Guideline (2012 Edition). The receiver-operating characteristic (ROC) curve analysis was finally performed to investigate the diagnostic performance of each indicator for CKD.ResultsThe prevalences of CKD in group A, B, and C were 10.8% (30/278), 16.4% (191/1 167), and 45.8% (314/686), respectively, and the difference among these groups was statistically significant (χ2=233.525, P<0.001). In addition, the levels of the six renal function indicators between CKD and non-CKD subjects also had statistically significant differences in different age groups (P<0 05="" otherwise="" roc="" curve="" analysis="" revealed="" that="" the="" diagnostic="" values="" of="" these="" indicators="" were:="" acr="" or="" pcr=""> eGFR or CysC > serum urea or SCr (AllP<0 05="" except="" that="" egfr="" cysc="" serum="" urea="" and="" scr="" in="" group="" a="" assessed="" the="" similar="" diagnostic="" performance="" among="" the="" three="" indicators="" recommended="" by="" kdigo="" guideline="" the="" diagnostic="" performances="" of="" acr="" and="" pcr="" in="" different="" age="" groups="" were:="" group="" b="" 0="" 915="" 0="" 914=""> group A (0.885, 0.890) > group C (0.841, 0.846), while the diagnostic performance of eGFR was group C (0.807) > group B (0.728) > group A (0.696). The best boundary values of ACR and PCR were lower while the value of eGFR was higher than the corresponding KDIGO recommended medical decision levels.ConclusionsACR is the first choice for screening CKD when the renal function index creatinine is normal. Moreover, eGFR can further improve the diagnostic value, especially in subjects over 65 years old.
【摘要】 目的 以99mTc-DTPA腎動態顯像法腎小球濾過率（glomerular filtration rate，GFR）測定為標準，將血清胱抑素C（cystatin C， CysC）檢測與其比較，探討CysC測定在2型糖尿病腎病（type 2 diabetic nephropathy，T2DN）診斷中的意義。 方法 2010年6月—2011年1月76例2型糖尿病（type 2 diabetes mellitus，T2DM）患者按24 h尿微量白蛋白（microalbuminuria，m-Alb）分為兩組:正常蛋白尿組（31例）和微量蛋白尿組（45例），同時測定GFR、CysC、血清肌酐（serum creatinine， Scr）和糖化血紅蛋白（hemoglobin A1c， HbA1c），并設正常自愿者38名作為對照組，進行統計學分析。 結果 對照組、T2DM正常蛋白尿組及T2DM微量蛋白尿組CysC水平分別為（1.1±0.6）、（1.6±0.7）、（1.0±0.3） mg/L，各組差異均有統計學意義（Plt;0.05）；HbA1c水平分別為（5.4±0.6）%、（7.1±2.7）%、（7.9±3.1）%、兩組T2DM患者與對照組比較，差異均有統計學意義（Plt;0.05）；GFR水平分別為（80.9±23.0）、（74.2±26.1）、（79.3±19.7） mL/（min?1.73 m2），各組差異無統計學意義（Pgt;0.05）；Scr水平分別為（87.7±23.8）、（93.7±38.4）、（81.5±11.4） μmol/L，組間差異無統計學意義（Pgt;0.05）。CysC、Scr和GFR之間呈負相關（r=-0.694，-0.692；Plt;0.001）；CysC和Scr之間呈正相關（r=0.903，Plt;0.001）。 結論 CysC可作為早期T2DN的檢測指標，具有較高的敏感性，但對于輕度到中度GFR降低的診斷準確性并不優于Scr。【Abstract】 Objective To demonstrate the clinical value of serum cystatin-C (CysC) in the assessment of renal function in type-2 diabetic nephropathy (T2DN) by comparing it with the glomerular filtration rate (GFR) measured by 99mTc-DTPA method. Methods From June 2010 to January 2011, 76 patients with type 2 diabetes mellitus (T2DM) were classified into two groups according to their 24 h microalbuminuria (m-Alb) level: the normal albuminuric group (n=31) and the microalbuminuric group (n=45). GFR, Serum creatinine (Scr), CysC, and hemoglobin A1c (HbA1c) were measured. Thirty-eight healthy subjects were recruited as the control group, and statistical analysis was carried out. Results The CysC levels in the control group, the normal albuminuric group and the microalbuminuria group were respectively (1.1±0.6), (1.6±0.7) and (1.0±0.3) mg/L, with a significant difference among the three groups (Plt;0.05). HbA1c level in the three groups were respectively (7.1±2.7)%, (7.9±3.1)% and (5.4±0.6)%, with a significant difference between the two diabetic groups and the control group (Plt;0.05). Scr levels in the three groups were respectively (87.7±23.8), (93.7±38.4), (81.5±11.4) μmol/L; GFR levels in the three groups were respectively (80.9±23.0), (74.2±26.1), (79.3±19.7) mL/(min?1.73 m2); among the three groups the differences of both Scr and GFR were not significant. Both CysC and Scr were negatively correlated with GFR (r=-0.694,-0.692;Plt;0.001), and CysC was positively correlated with Scr (r=0.903, Plt;0.001). Conclusion Increased CysC may be an early indicator of incipient diabetic nephropathy, but the diagnostic accuracy of CysC is not superior to that of Scr in distinguishing between mildly and moderately reduced GFR.
