Morphological difference of the renal glomerulus at different age groups have been studied in young (three month-old), adult (twelve month-old) and old (thirty month-old) Fisher strain 344 rats. Pieces of the tissues were taken from renal corticies prefixed with 2.5% glutaraldehyde-1.5% paraformaldehyde (0.1 M Millonig's phosphate buffer, pH 7.3), following by post-fixation with 1% osmium tetroxide (0.1 M Millonig's phosphate buffer, pH 7.3) and embedded within Araldite. The ultrathin sections contrasted with uranyl acetate and lead citrate were observed under a JEM 100CX electron microscope. The mean thickness of glomerular basal lamina and Bowman's capsule were determined by measuring the thinnest portion of basal lamina, and by taking the average of 50 readings from electron micrographs at different ages. The numerical changes of the slit pores were compared based upon the numbers over the length of 10um of glomerular basal lamina. The results were as follow: 1. The thickness of glomerular basal lamina is increased during aging; 140.4 nm in young rats, 270.0 nm in adult ones, and 437.8 nm in old ones. 2. The thickness of basal lamina of parietal cells of Bowman's capsule is 187.5 nm in young rats, 914.0 nm in adult ones, and 2850.0 nm in old ones. 3. The numbers of the slit pores of basal lamina are reduced during aging, 30.3 slit pores/$10{\mu}m$ in adult ones, and 24.2 slit pores/$10{\mu}m$ in old ones. 4. Accumulation of dense intracytoplasmic filamentous material in the parietal cells of Bowman's capsule is increased in the vicinity of the basal lamina during aging. The proximal tubule-like epithelial cell in Bowman's capsule is observed at one glomerulus in a young rat. 5. The endothelial cells are edematous and form balloon-like structure protruding into capillary lumen in young and old rats. 6. Cytoplasm of the podocyte shows a variety of alteration during aging, such as swelling of mitochondria and of endoplasmic reticulum, and increase of microtubules, microfilaments, lysosomes and lamellated myelin structures, etc. Accumulation of dense intracytoplasmic material in the foot processes is increased in the vicinity of the basal lamina during aging. The podocytic membrane-like structures are seen in young and o]d rats. 7. The mesangial matrices and mesangial cells are increased during aging, and slight swelling of endoplasmic reticulum and Golgi cisternae in young and old rats.
Sohn, Eun-Hwa;Jang, Seon-A;Woo, Han Goo;Koo, Hyun Jung;Han, Hyo-Sang;Kang, Se Chan
Korean Journal of Plant Resources
/
v.26
no.5
/
pp.652-657
/
2013
In the present study, anti-oxidative and the RMC proliferation inhibitory propeties of 80% ethanol extracts from 63 kinds of traditional medicines were investigated. Inhibitory effects of RMC proliferation were showed that Dalbergia odorifera T. Chen., Melia azedarach Linn$\acute{e}$ and Hydnocarpus anthelmintica Pierre. Among them Hydnocarpus anthelmintica Pierre had the highest anti-oxidative activity ($ORAC_{PE\;value}=1.6$, DPPH = 81.1), but Dalbergia odorifera T. Chen. and Melia azedarach Linn$\acute{e}$ had no effects. These results suggest that the Hydnocarpus anthelmintica Pierre could prevent or protect from kidney disease as antioxidant and anti-proliferative agent for RMC.
Purpose: Diabetic nephropathy is one of the most important diabetic complications prompted by chronic hyperglycemia, characterized by glomerulosclerosis, tubular fibrosis, and it eventually causes kidney failure. Nobiletin is a polymethoxyflavone present in tangerine and other citrus peels, and has anti-cancer and anti-inflammatory effects. This study investigated the effects of nobiletin on glomerular fibrosis through inhibition of the transforming growth factor (TGF)-β1-Src-caveolin-1 pathway. Methods: Human renal mesangial cells (HRMC) were incubated in media containing 33 mM glucose with or without 1-20 uM nobiletin for 3 day. The cellular expression levels of fibrogenic collagen IV, fibronectin, connective tissue growth factor (CTGF), TGF-β1, Src and caveolin-1 were all examined. In addition, TGF-β1, Src and caveolin-1 proteins were screened to reveal the relationship among TGF-β1-Src-caveolin-1 signaling in glomerular fibrosis. Results: High glucose promoted the production of collagen IV, fibronectin and CTGF in HRMC, which was inhibited in a dose dependent manner by 1-20 uM nobiletin. The Western blot data showed that high glucose elevated the expression of TGF-β1, Src, caveolin-1 and Rho GTPase. When nobiletin was treated to the HRMC exposed to high glucose, the expression of TGF-β1-Src-caveolin-1 was dampened. Finally, TGF-β1-Src-caveolin-1 signaling pathway was activated in high glucose-exposed HRMC, and such activation was encumbered by nobiletin. Conclusion: These result demonstrated that nobiletin blunted high glucose-induced extracellular matrix accumulation via inhibition of the TGF-β1-Src-caveolin-1 related intracellular signaling pathway. Nobiletin may be a potent renoprotective agent to counteract diabetes-associated glomerular fibrosis that leads to kidney failure.
Objective : The aim of the study was to investigate the preventive effect of Acanthopanax senticosus(AS) aqua-acupuncture into Sinsu(BL23) of the multiple low-does strepozotocin(STZ)-induced diabetic rats. Methods : The experimental animals were divided into 4 groups : normal group of rats, control group of multiple low-does STZ-induced diabetic rats, NSAA group with 0.4ml normal saline(NS) aqua-acupunctured subcutaneously into Sinsu in multiple low-does STZ-induced diabetic rats, and ASAA group with 0.4ml of 20% AS aqua-acupunctured subcutaneously into Sinsu in multiple low-does STZ-induced diabetic rats. Each of AS and NS aqua-acupuncture was done subcutaneously into both loci of Sinsu taking turns everyday for 3 weeks. Thereafter the levels of serum glucose, body weight, index of kidney hypertrophy, urine glucose, urinary albumin excretion, creatinine clearance, mesangial cell and TGF-${\beta}1$ expression in glomeruli and tubular cells were measured on the determined day. Conclusions : 1. Both ASAA and NSAA groups decreased the serum glucose levels in multiple low-dose STZ-induced diabetic rats as compared to the cintrol group, and ASAA group showed more significant decreases than NSAA group. 2. Both ASAA and NSAA groups prevented the development of diabetes in multiple low-dose STZ-induced diabetic rats as compared to the control group, and ASAA group prevented more markedly the development of diabetes than NSAA group. 3. Both ASAA and NSAA groups prevented the reduction of body weight in multiple low-dose STZ-induced diabetic rats as compared to the control group, and ASAA group showed the same as the normal group. 4. Both ASAA and NSAA groups did not show any changes of the creatinine clearance in multiple low-does STZ-induced diabetic rats. 5. Both ASAA and NSAA groups prevented the excretion of urinary glucose and albumin in multiple low-dose STZ-induced diabetic rats as compared to the cintrol group, and ASAA group showed more significant prevention than NSAA group. 6. Both ASAA and NSAA groups prevented the expansion of glomerular cells and the protein expression of transforming growth factor-${\beta}1$ in multiple low-dose STZ-induced diabetic rats as compared to the cintrol group, and ASAA group prevented more significantly than NSAA group.
Morphological difference of the renal glomerulus at different age groups have been studies in one week-old, five weeks-old, eight weeks-old, six months-old, twelve months-old, eighteen months-old, twenty-four months-old, and thirty months-old ICR mice. Pieces of the tissue taken from the renal corticies were fixed in 2.5% glutaraldehyde-1.5% paraformaldehyde solution (0.1 Millonig's phosphate buffer pH 7.3), and 1% osmium tetroxide solution (0.1 M Millonig's phosphate buffer, pH 7.3), and were embedded in araldite mixture. The ultrathin sections were stained with uranyl acetate and lead citrate solution, and were observed under a JEM 100CX-II electron microscope. The results were as follows: 1 In the one week-old mouse, thicknesses of the three layers of the glomeluar basal lamina (lamina densa, lamina rara interna and lamina rara externa) are similar, but in the five weeks-old mouse, thick lamina densa becomes a greater portion of the thickness of whole glomerular basal lamina. 2. No difference was noticed between thickness of the renal glomerular basal lamina of the five weeks-old mouse compare with that of the one week-old one, but basal lamina of the eight weeks-old one is thickened considerably and thicknesses were maintained through twelve months-old one. After eighteen months, the thickness of the glomerular basal lamina is increased remarkably. 3. After eighteen months, electron dense deposits within the basal lamina of the renal glomeruli are observed frequently. 4. Amount of the microfilaments in the mesangial cells and the mesangial matrices are increasing during aging. 5. The thicknesses of the basal laminae of the Bowman's capsule are increasing during aging. 6. After twenty four months, the proximal tubular cell-like parietal cells with well developed microvilli are observed frequently. From the above results, it was suggested that the renal glomerulus matures structurally in five weeks, and the function of the glomerulus is suppressed after eighteen months.
The author was used for the ICR mouse and induced diabetes with the streptozotocin(50mg/kg)and alloxan(40mg/kg). After the testing and the identifying the diabetes, the histological changes of the glomerulus, blood test for the values of blood sugar, and urine test for the values of urine protein were investigated. The results are as follows : 1. The values of high blood sugar appeared from the 2 group were about $378mg/d{\ell}{\sim}709mg/d{\ell}$, in the treated groups with the streptozotocin and alloxan. The glycosuria were obviously continued from the 2 weeks to the 12 weeks of the streptozotocin and the alloxan treated groups and the proteinuria was ${\pm}{\sim}+$ in the 4 weeks and 8 weeks of streptozotocin treated group and were + in all the 12 weeks. The ketonuria were generally negative. 2. In the view of the light microscope, there was no significant histological changes until the 8 weeks. However, in the 12 weeks group treated with the streptozotocin, the mesangial matrix of glomerulus increased Bowman's capsules adhered to each other and changed them to the crescence shapes because of increasing the exothelial cells.
Journal of The Korean Society of Inherited Metabolic disease
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v.15
no.3
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pp.127-137
/
2015
Purpose: The main aim of this study was to compare and analyze expression profiles of microRNAs (miRNAs) to establish miRNA signature of Fabry nephropathy related epithelial mesenchymal transition (EMT). Methods: Expression profiles of miRNAs in kidney tissue samples and cell lines from normal and Fabry disease mouse model were examined by miRNA expression microarray analysis followed by quantitative real-time polymerase chain reaction analysis (qRT-PCR). Results: In the miRNA expression microarray analysis of Fabry mouse kidney tissues compared to wild type mouse, 5 and 3 miRNAs among 1,247 miRNAs examined were up- and down-regulated, respectively. Among them, miR-149-5p was down-regulated about 2-fold in Fabry kidney samples. The down-regulations of miR-149-5p were observed in kidney tissues of under 35 week-old-Fabry mice. However, this down-regulation was not observed in kidney tissues of 42 week-old Fabry mice. In SV40 MES 13 cells, mouse mesangial cells, treated with globotriaosylsphingosine (lyso-Gb3), miR-149-5p was also downregulated. The down-regulation of miR-149-5p induced up-regulation of its target genes related to EMT. Conclusion: The miRNA expression array and qRT-PCR results show that miR-149-5p expression was decreased in kidney tissues of Fabry mice compared to wild type mice under 35 weeks of age. Along with the observation of miR-149-5p expression in Fabry disease cell models, these results indicate that the down-regulated miR-149-5p were related to the biological response of mesangial cells to lyso-Gb3 and also have influence to the transcriptional up-regulation of its target genes. These results suggest miR-149-5p might play important roles in the Fabry nephropathy.
Kim, Mingyeong;Cho, Chi Heung;Kim, Sera;Choi, In-Wook;Lee, Sang-Hoon
Journal of Marine Bioscience and Biotechnology
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v.13
no.2
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pp.94-103
/
2021
Here, we evaluated the anti-glycation effects and renal protective properties of 70% (v/v) ethanolic extract of Colpomenia sinuosa (CSE) against AGEs -induced oxidative stress and apoptosis at different concentrations (1, 5, and 20 ㎍/mL). At 20 ㎍/mL, CSE showed that anti-glycation activities via the inhibition of AGE formation (51.1%), inhibition of AGEs-protein cross-linking (61.7%), and breaking of AGEs-protein cross-links (33.3%), were significantly (###p < 0.001 vs. non-treated group) lower than the nontreated group. Methylglyoxal (MGO) significantly (***p < 0.001) reduced cell viability (24.4%) and increased reactive oxygen species (ROS) level (642.3%), MGO accumulation (119.4 ㎍/mL), and apoptosis (55.0%) in mesangial cells compared to the nontreated group. Pretreatment with CSE significantly (###p < 0.001) increased cell viability (57.8%) and decreased intracellular ROS (96.5%), MGO accumulation (80.0 ㎍/mL), and apoptosis (22.6%) at 20 ㎍/mL. Additionally, we confirmed intracellular AGEs reduction by CSE pretreatment. Consequently, our results suggest that CSE is a good source of natural therapeutics for managing diabetic complications by the antiglycation effect and renal protective activity against MGO-induced oxidative stress.
In order to study the effects of $\alpha$-tocopherol acetate in glomerular injury, the minimal change nephrosis disease was induced by puromycin aminonucleoside (PAN) in spontaneously hypertensive rats, and we examined biochemical analysis in serum and morphological changes. The experimental animals were divided to control, PAN-treated (30 mg/kg, I.p.), vitamin E-treated (200 mg/kg, P.O.), and PAN+vitamin E-treated groups. After PAN injection, the rate of increase of body weight was lower than the other treatments. In addition, at 8 days after PAN injection, total protein content in serum was the lowest, whereas both blood urea nitrogen and serum creatinine contents were the highest in all experimental groups, which their changes of serum parameters were statistically significant. In morphological changes, the glomerular tissue at 8 days after PAN injection clearly showed obstruction of urinary space and proliferation of mesangial cells, and that loss and fusion of pedicles, vacuolization and edema of endothelial cells, and thickness of basal lamina were ultrastructurally showed in the glomerulus. Glomerular injury was significantly prevented by administration of vitamin E having an antioxidant effect. It suggested that the glomerular injury induced by PAN was accelerated by hypertension, and renal dysfunction might be induced by oxidative injury.
Purpose : Hepatitis B virus (HBV) infection has been involved in several forms of immune-related glomerulopathy but the pathogenic role of HBV infection is not clear. To evaluate the clinicopathological features of HBV-associated glomerulopathy, a clinicopathological analysis and immunohistochemical stain for HBs Ag and HBe Ag were done. Methods : Clinicopathological features of HBV-associated glomerulopathy were analyzed with renal biopsies in 28 HBsAg seropositive patients from April 1990 to February 1997 at Pusan Paik Hospital, and immunohistochemical evaluation for HBsAg and HBeAg was done in renal tissues. Light microscopic, immunofluorescent and electron microscopic examination and immunohistochemical staining for HBsAg (DAKO) and HBeAg (BIONIKE) of renal tissue were performed. Result ; 1. The age distribution was 6 to 73 years old, and eight were children and 20 were adults. Male : female ratio was 3:1. Nineteen (67.9%) and 21 (75.0%) of 28 cases showed hematuria and proteinuria, respectively at the time of biopsy. Sixteen (57.2%) of them had nephrotic syndrome. 2. Liver function test was performed in 11 patients and seven (63.6%) of them showed increased AST and ALT levels. Liver biopsy was done in three patients and revealed findings of chronic active hepatitis. 3. HBV-associated glomerulopathy was membranous glomerulonephritis (MGN) in 10 (35.7%), mesangiopathy in 8 (28.6%), membranoproliferative glomerulonephritis (MPGN) in 7 (25.0%) and minimal change disease in 3 (10.7%) out of 28 cases. 4. Ultrastructurally HBV-associated MGN showed conspicuous subepithelial deposits with intramembranous, mesangial and subendothelial deposits and proliferation of mesangial cells and matrix, which were suggestive of MPGN. In HBV-associated MPGN, intramembranous and subepithelial deposits were scattered. 5. Immunohistochemical staining revealed no expression for HBsAg, but positive reaction for HBeAg along capillary wall in 8 cases (28.6%), of which 3 cases were checked for serum HBeAg, all showed positivity. Conclusion : HBV-associated glomerulopathy showed a wide morphologic spectrum and overlapping ultrastructural features in MGN and MPGN, and the activity of hepatitis B virus may be related to the development of HBV-associated glomerulopathy but further studies are recommended to confirm this relationship.
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