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"Latar Belakang: Penyakit ginjal diabetik (PGD) merupakan salah satu penyebab terbanyak penyakit ginjal kronik tahap akhir. Podositopati sebagai gambaran dini PGD dapat ditandai oleh adanya protein spesifik podosit (nefrin dan podosin) di urin. Asymmetric dimethylarginine (ADMA) merupakan penanda disfungsi endotel yang diketahui meningkat pada hiperglikemia serta berhubungan dengan albuminuria dan progresivitas kerusakan ginjal. Mekanisme terjadinya gangguan ginjal akibat disfungsi endotel belum sepenuhnya diketahui. Tujuan: Penelitian ini bertujuan untuk mengetahui korelasi ADMA plasma dengan kadar nefrin, podosin, dan rasio podosin nefrin (RPN) urin pada pasien PGD. Metode: Studi potong lintang dilakukan terhadap pasien PGD pada dua rumah sakit di Jakarta sepanjang periode April sampai Juni 2023. Dilakukan pengumpulan data karakteristik subjek, riwayat penyakit dan pengobatan, serta data laboratorium yang relevan. Pemeriksaan ADMA dilakukan dengan metode liquid chromatography dari darah, sedangkan nefrin dan podosin dilakukan dengan metode ELISA dari urin. Uji korelasi dilakukan untuk menilai hubungan ADMA dengan nefrin, podosin, dan RPN. Regresi linier dilakukan untuk menilai pengaruh variabel perancu terhadap hubungan tersebut. Hasil: Dari data 41 subjek yang dianalisis ditemukan rerata ADMA 70,2 (SD 17,2) ng/mL, median nefrin 65 (RIK 20-283) ng/mL, dan median podosin 0,505 (RIK 0,433-0,622) ng/mL. Ditemukan korelasi bermakna antara ADMA dengan nefrin (r=0,353; p=0,024) dan korelasi bermakna antara ADMA dengan RPN (r=–0,360; p=0,021). Tidak ditemukan korelasi bermakna antara ADMA dengan podosin (r=0,133; p=0,409). Analisis multivariat menunjukkan indeks massa tubuh sebagai faktor perancu. Simpulan: Terdapat korelasi positif lemah antara ADMA dengan nefrin urin dan korelasi negatif lemah antara ADMA dengan RPN urin pada pasien PGD. Tidak ditemukan korelasi antara ADMA dengan podosin urin.

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Background: Diabetic kidney disease (DKD) is the leading cause of end-stage kidney disease, and podocytopathy is an early manifestation of DKD characterized by the urinary excretion of podocyte-specific proteins, such as nephrin and podocin. Asymmetric dimethylarginine (ADMA), a biomarker of endothelial dysfunction, is associated with progressive kidney dysfunction. However, the mechanism of endothelial dysfunction in DKD progression is unclear. Objectives: The aim of this study was to investigate the correlations of ADMA levels with nephrin, podocin, and the podocin nephrin ratio (PNR) in DKD patients. Methods: A cross-sectional study of 41 DKD outpatients was performed in two hospitals in Jakarta from April to June 2023. The collected data included the subjects’ characteristics, histories of disease and medication, and relevant laboratory data. Serum ADMA was measured using liquid chromatography, while urinary podocin and nephrin were measured using the enzyme-linked immunosorbent assay (ELISA) method. A correlation analysis was performed to evaluate the correlation of ADMA with nephrin, podocin, and PNR. Regression analysis was performed to determine confounding factors. Results: The mean value of ADMA was 70.2 (SD 17.2) ng/mL, the median for nephrin was 65 (20-283 ng/mL), and the median of podocin was 0.505 (0.433-0.622) ng/mL. ADMA correlated significantly with nephrin (r = 0.353, p = 0.024) and PNR (r = -0.360, p = 0.021), but no correlation was found between ADMA and podocin (r = 0.133, p = 0.409). The multivariate analysis showed that body mass index was a confounding factor. Conclusion: This study revealed weak positive correlations between ADMA and urinary nephrin, and weak negative correlations between ADMA and PNR in DKD patients. No correlation was found between ADMA and urinary podocin.

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"Latar Belakang: Penyakit ginjal diabetik (PGD) merupakan komplikasi mikrovaskular yang paling sering terjadi pada diabetes melitus. Podositopati merupakan kunci utama dari kerusakan glomerular pada PGD. miRNA-21 merupakan regulator epigenetik yang mempunyai peran dalam kerusakan podosit pada PGD, namun hasil dari penelitian yang sudah ada sebelumnya masih menyisakan kontroversi tentang peran miRNA-21 pada patogenesis PGD. Tujuan: Mengetahui korelasi antara kadar miRNA-21 dengan kadar nefrin urin, podosin urin, dan rasio albumin kreatinin urin pada pasien PGD. Metode: Studi potong lintang terhadap 42  pasien PGD di RSUPN Cipto Mangunkusumo Jakarta selama periode April sampai Juli 2023. Uji korelasi dilakukan untuk menilai hubungan miRNA-21 dengan nefrin, podosin, dan rasio albumin kreatinin urin. Regresi linier dilakukan untuk menilai variabel perancu terhadap hubungan tersebut. Hasil: Didapatkan hasil rerata ekspresi relatif miRNA-21 0,069 (0,024) , median nefrin 35,5 (15,75 – 51,25)ng/ml, median podosin 0,501 (0,442– 0,545) ng/mL, dan rasio albumin kreatinin urin 150 (94,56 – 335,75) ng/ml.Ditemukan korelasi antara miRNA-21 dengan nefrin (r = 0,598; p = <0,0001). Ditemukan korelasi antara miRNA-21 dengan rasio albumin kreatinin urin (r = 0,604; p = <0,0001). Tidak didapatkan korelasi antara miRNA-21 dengan podosin. Simpulan: Terdapat korelasi positif antara miRNA-21 dengan nefrin dan rasio albumin kreatinin urin namun tidak didapatkan korelasi yang bermakna antara miRNA-21 dengan podosin urin.

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Diabetic kidney disease (DKD) is the most common microvascular complication in diabetes mellitus. Podocytopathy is a key component of glomerular damage in DKD. miRNA-21 is an epigenetic regulator that plays a role in podocyte damage in DKD, however, the results of previous studies have not resolved the controversy about the role of miRNA-21 in the pathogenesis of DKD. Objective: The aim is to investigate the correlation between miRNA-21 levels and the urinary nephrin, urinary podosin, and urinary albumin-creatinine ratio (uACR) in patients with DKD.  Methods: A cross-sectional study of 42 patients with DKD was conducted at Cipto Mangunkusumo Hospital Jakarta from April to June 2023. A correlation test was performed to assess the association of miRNA-21 with the nephrin, podosin, and uACR. A linear regression test was performed to assess the confounding variables in these relationships. Results: The mean relative expression of miRNA-21 was 0.069 (0.024), the median nephrin was 35.5 (15.75 - 51.25) ng/ml, the median podocin was 0.516 (0.047 - 0.620) ng/ml, and the uACR was 150 (94.56 - 335.75) ng/ml. There was a correlation between miRNA-21 and nephrin (r = 0.598; p = <0.0001). There was a correlation between miRNA-21 and the uACR (r = 0.604; p = <0.0001). No correlation was found between miRNA-21 and podocin. Conclusions: There was a positive correlation between miRNA-21 and nephrin and urinary albumin-creatinine ratio, but no significant correlation between miRNA-21 and urinary podocin."

"Studi eksperimental hewan memperlihatkan bahwa kadar vasopresin serum yang tinggi berhubungan dengan hiperfiltrasi, albuminuria dan hipertrofi glomerulus, dan dikhawatirkan berlanjut menjadi penurunan laju filtrasi glomerulus (LFG) dalam jangka panjang. Namun, belum terdapat laporan yang membuktikan hubungan sebab-akibat antara peningkatan vasopresin serum dengan gangguan ginjal. Studi ini bertujuan untuk mengetahui hubungan peningkatan vasopresin serum dengan gangguan ginjal, beserta lokasi gangguan ginjal tersebut. Studi ini juga ditujukan untuk melihat kemampuan berat jenis (BJ) urin untuk mendeteksi gangguan ginjal.Penelitian ini adalah studi potong lintang dengan consecutive sampling di sebuah pabrik sepatu pada bulan Januari–Maret 2020. Subjek adalah pekerja terpajan panas yang dinyatakan sehat berdasarkan medical checkup tahun 2019. Sampel darah dan urin diambil lima jam setelah subjek bekerja. Subjek diperiksakan kreatinin plasma, estimasi LFG berdasarkan CKD-EPI, BJ urin, albuminuria carik-celup, albumincreatinine ratio (ACR) urin, vasopresin serum, kidney injury molecule-1 (KIM-1) urin, dan nefrin urin. Data masa kerja, dan jenis kelamin diperoleh melalui wawancara.Pada studi ini, diperoleh 119 subjek wanita dengan median usia 38 (31–51) tahun dan median masa kerja 10 (3–14) tahun. Hiperfiltrasi didapatkan pada 18 subjek, LFG tidak menurun pada 104 subjek (87,4%), dan peningkatan nefrin urin pada 104 pekerja (87,4%). Tidak terdapat hubungan antara vasopresin meningkat dengan hiperfiltrasi, penurunan LFG, albuminuria, nefrin urin, dan KIM-1 urin. Terdapat hubungan bermakna antara peningkatan nefrin urin dengan masa kerja ≥ 10 tahun (p = 0,03). Terdapat hubungan peningkatan KIM-1 urin dengan albuminuria (p = 0,008). Terdapat area under the curve (AUC) antara BJ urin dan nefrin urin sebesar 81,7% (95% CI 68,8–94,6%), dengan titik potong BJ urin ≥ 1,018 yang memiliki sensitivitas 71,2% dan spesifisitas 80% untuk kenaikan nefrin.Sebagai simpulan, peningkatan vasopresin serum tidak berhubungan dengan hiperfiltrasi, penurunan LFG, albuminuria, dan peningkatan KIM-urin. Masa kerja > 10 tahun dihubungkan dengan peningkatan nefrin urin. BJ urin ≥ 1,018 dapat dijadikan acuan untuk mendeteksi kenaikan nefrin urin pada pekerja terpajan panas.

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Animal experimental studies have shown that high serum vasopressin levels are associated with hyperfiltration, albuminuria, and glomerular hypertrophy, which may lead to decreased glomerular filtration rate (GFR) in long-term. However, there was no earlier report that has established the causal relationship between elevated serum vasopressin and renal impairment. This study aims to determine the association between increased serum vasopressin and kidney impairments, along with the location of these impairments. This study is also aimed to look at the ability of urine specific gravity to detect elevated serum vasopressin and kidney impairments.This study was a cross-sectional study with consecutive sampling in a shoe factory from January–March 2020. Subjects were heat-exposed workers who were declared healthy based on the medical checkup in 2019. Blood and urine samples were taken five hours after the subject worked. Subjects were examined for plasma creatinine, estimated GFR (eGFR) based on CKD-EPI, urine specific gravity, dipstick albuminuria, urine albumin-creatinine ratio (ACR), serum vasopressin, urine kidney injury molecule-1 (KIM-1), and urinary nephrin. Data on age, length of service, and gender were obtained through interviews.There were 119 female subjects with a median age of 38 (31–51) years and a median length of service 10 (3–14) years. eGFR was not decreased in 104 subjects (87.4%) and urinary nephrin increased in 104 workers (87.4%). There were no increase in urinary albumin excretion and urinary KIM-1. There were significant association between increased urinary nephrin with length of service ≥ 10 years (p = 0.03), normal-increased eGFR with age 30–39 years (p = 0.001), and increased urinary KIM-1 with albuminuria (p = 0.008). There was an area under the curve (AUC) of 81.7% (95% CI 68.8–94.6%) between urine specific gravity and urinary nephrin, with a cut-off point of urine specific gravity > 1.018 having a sensitivity of 71.2% and a specificity of 80% for the increase in urinary nephrin.In conclusion, increased serum vasopressin does not cause a decrease in GFR, albuminuria, and increase in urinary KIM, but does cause an increase in urinary nephrin. urine specific gravity ≥ 1.018 can be used as a cut-off for detecting increased urinary nephrin in heat-exposed workers."