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Background: mRNA for biomarkers of kidney injury extracted from urinary exosomes may reflect or predict levels of the corresponding protein after transplantation and clinical outcomes.
Methods: Urinary exosomes were isolated from patients following renal transplantation, from healthy controls, and patients with CKD. Expression of exosomal mRNA for the injury biomarkers neutrophil gelatinase-associated lipocalin (NGAL), interleukin-18 (IL-18), kidney injury molecule-1 (KIM-1), and cystatin C was compared with the concentrations of corresponding urinary proteins, 18S RNA and serum creatinine.
Results: All biomarker protein concentrations increased after transplantation, and urinary NGAL and IL-18 at 24 and 168 h correlated with the day 7 creatinine reduction ratio (CRR). Exosomal18S RNA increased after transplantation, but exosomal mRNA for NGAL, IL-18 and cystatin C did not correlate with the day 7 CRR, or urinary biomarker concentrations at any time after transplantation. Exosomal NGAL mRNA was lower 4 h after transplantation than in control exosomes. In contrast, exosomal mRNA for cystatin C was unchanged after transplantation and in CKD, although urinary cystatin C temporarily increased following transplantation. Urinary KIM-1 increased after transplantation, but exosomal mRNA for KIM-1 remained undetectable. In CKD 18S RNA was raised, and exosomal mRNA for NGAL, IL-18 and cystatin C was detected in all patients. While urinary NGAL was greater in CKD than control subjects, exosomal NGAL mRNA was unchanged. Exosomal IL-18 mRNA was increased in CKD, but not IL-18 protein.
Conclusions: After renal transplantation, urinary NGAL and IL-18 levels reflect the day 7 CRR. However, while mRNA for these biomarkers is present in exosomes, their levels do not reflect or predict urinary biomarker levels or the CRR. This likely reflects the fact that packaging of mRNA in exosomes is selective, and is not necessarily representative of mRNA in the parent cells responsible for biomarker production.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4053318 | PMC |
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0098644 | PLOS |
PLoS One
December 2024
Animal and Rangeland Sciences, Oregon State University, Corvallis, Oregon, United States of America.
The potential association of milk with childhood obesity has been widely debated and researched. Milk is known to contain many bioactive compounds as well as bovine exosomes rich in micro-RNA (miR) that can have effects on various cells, including stem cells. Among them, adipose stem cells (ASC) are particularly interesting due to their role in adipose tissue growth and, thus, obesity.
View Article and Find Full Text PDFFront Endocrinol (Lausanne)
December 2024
Department of Endocrinology, Zhoushan Hospital, Zhejiang Province, Zhoushan, Zhejiang, China.
Objective: This systematic review and meta-analysis aimed to synthesize the role of exosomes in the pathogenesis and management of diabetic kidney disease.
Methods: PubMed, Embase, Cochrane Library, and Web of Science were searched for studies that compared the levels of exosomes between patients with diabetic kidney disease and controls published up to 27 November 2023. Methodological quality was assessed using the JBI Appraisal Checklist for Case-Control Studies.
Biol Direct
December 2024
Department of Colorectal Surgery, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, 310016, China.
Exosomes have emerged as significant biomarkers for multiple diseases, including cancers. Circular RNAs (circRNAs), abundant in exosomes, are involved in regulating cancer development. However, the regulatory function and the underlying molecular mechanism of hsa_circ_0006906 (circSCP2) in colorectal cancer (CRC) metastasis remain unclear.
View Article and Find Full Text PDFZhongguo Zhong Yao Za Zhi
November 2024
the First Affiliated Hospital of Hunan University of Chinese Medicine Changsha 410007, China Xiangtan Hospital of Chinese Medicine Xiangtan 411199, China.
This study aims to investigate the effects of Bushen Huoxue Decoction regulating adipose-derived stem cells(ADSCs)-exosomes(Exos) on the apoptosis of intervertebral disc nucleus pulposus cells(NPCs) and extracellular signal-regulated kinase(ERK) signaling pathway. Tert-butyl hydrogen peroxide(TBHP)-induced NPCs were divided into control, model, drug-containing serum, blank Exos, normal serum Exos, and drug-containing serum Exos groups. Cell viability and proliferation were examined by the CCK-8 assay and EdU staining, respectively.
View Article and Find Full Text PDFZhongguo Zhong Yao Za Zhi
September 2024
the First Affiliated Hospital of Henan University of Chinese Medicine Zhengzhou 450000, China.
This study explores the reparative effect of Qixiong Zuogui Compound Prescription(QXZG) intervention on the blood-brain barrier(BBB) in the aging brain with middle cerebral artery occlusion(MCAO) in rats mediated by bone marrow stem cells(BMSCs)-derived exosomes, as well as its anti-aging mechanism. An aging MCAO composite model was established using D-galactose-induced aging combined with line embolism. Rats were divided into young sham surgery group, aging sham surgery group, model group, exosome group, and exosome with traditional Chinese medicine(TCM) intervention group.
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