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Mesangiums, Glomerular

Mesangiums, Glomerular: The mesangium is a specialized region within the glomerulus of the kidney.
It consists of mesangial cells and their surrounding extracellular matrix.
The mesangium plays a crucial role in regulating glomerular filtration and maintaining the structural integrity of the glomerulus.
Understanding the biology and pathology of the mesangium is important for the study of various kidney diseases, such as glomerulonephritis and diabetic nephropathy.
Reserchers can leverage PubCompare.ai's AI-powered platform to optimize their research protocols focused on this key component of the renal glomerulus.

Most cited protocols related to «Mesangiums, Glomerular»

The genome-wide expression data of murine podocytes, mesangial, and endothelial cells were obtained from http://www.gudmap.org/. The identifications of data sets that have been utilized in our study are listed in Supplemental Table 5. The detailed protocol of data generation is described in a recently published paper by Brunskill et al. (2011) (link) and can also be found in our Supplemental Methods. We preprocessed and normalized data as described in Microdissected Human Kidney Data. By comparing the expression level in podocytes versus the other two major cell types in glomeruli, we define a gene to be podocyte-specific if its expression in podocytes is 4.76-fold over mesangial cells and 4.65-fold over glomerular capillary endothelial cells. The cut-off values represent three standard deviations of the average difference between podocytes and mesangial/endothelial cell transcripts, respectively. By use of HomoloGene from NCBI Entrez (Maglott et al. 2011 (link)), 102 murine genes could be mapped to their Homo sapiens ortholog (Supplemental Table 6).
Publication 2013
Capillary Endothelial Cells Cells Endothelial Cells Endothelium Genes Genome Homo sapiens Kidney Kidney Glomerulus Mesangial Cells, Kidney Mesangiums, Glomerular Mus Podocytes
Kidney and heart specimens (4 mm) fixed in 10% formalin, paraffin-embedded, and stained with Masson's trichrome and Periodic acid-Schiff (PAS) reagent (Sigma-Aldrich). Semi-qualitiative histologic changes were assessed by a masked observer. The total numbers of kidney glomeruli were counted, and the degree of glomerular damage was estimated at 400× magnification from the degree of mesangial expansion in PAS stained tissue as follow: <25%, 25–50%, 50–80%, >80% [79 (link)]. Kidney interstitial fibrosis was estimated at 200× magnification on Masson's trichrome-stained sections using 10 randomly selected fields for each animal by the following semiquantitative criteria: 0, area of damage <5%; 1, areas of damage 5–10%; 2, damage involving 10–25%; 3, damage involving 25–50%; 4, >50% of the area being affected [73 (link)]. The cardiac fibrosis area was determined at 200× magnification in Masson's trichrome stained sections using ImageJ 1.36b (National Institutes of Health, USA).
Publication 2010
Animals Fibrosis Formalin Heart Kidney Kidney Glomerulus Mesangiums, Glomerular Paraffin Periodic Acid Schiff's reagent Tissue Stains
A subset of subjects underwent percutaneous kidney biopsy at the end of the treatment period to determine whether treatment with losartan was associated with structural differences. Baseline kidney biopsies were not performed because of safety concerns. Tissue was processed and embedded in epoxy resin (Epon 812) and prepared for microscopy as described previously (12 (link)). Light and electron microscopy were performed either in the Beckman Center for Electron Microscopy at Stanford University or in the Division of Nephrology at the University of Minnesota. Digital light and electron micrographs were used to make measurements using formal stereologic methods to account for two-dimensional sampling of three-dimensional objects (13 ). Predefined morphometric variables included glomerular volume, percent globally sclerotic glomeruli, fractional interstitial area, mesangial fractional volume, filtration surface area density, glomerular basement membrane width, number of endothelial cells, mesangial cells and podocytes per glomerulus, filtration slit frequency, and foot process width (12 (link),14 (link)–16 (link)).
Publication 2013
Biopsy Electron Microscopy Electrons Endothelium Epon 812 Epoxy Resins Filtration Fingers Foot Glomerular Basement Membrane Kidney Kidney Glomerulus Losartan Mesangial Cells, Kidney Mesangiums, Glomerular Microscopy Percutaneous Administration Podocytes Safety Sclerosis Tissues
Proteinuria was determined with Albustix strips (Bayer) using a 0–4 scale. Transverse sections of kidney were processed and stained with hemotoxylin and eosin (H&E) and periodic acid Schiff (PAS). Renal lesions were classified as previously described based on a modified International Society of Nephrology/Renal Pathology Societyclassification (15 (link)). Briefly glomerular lesions were classified: negative, mesangial matrix (PAS+) expansion (Mm), mesangial expansion with increased mesangial cellularity (Mc), capillary hyaline (immune complex type) deposits (HD) and proliferative glomerulonephritis (glomerular hypercellularity with capillary loop involvement, which was global [Pg] or segmental [Ps]). Extent of involvement was graded on a 1–4 scale. Glomerular sclerosis was graded separately. Chronic (mononuclear cell) inflammation was classified as perivascular or interstitial (ICI) and graded as for glomerular inflammation. Glomerular macrophages and CD4+ T cells weredetected on re-hydrated 8 µM sections first incubated with 0.6% H2O2 and 0.2% NaN3 to inhibit endogenous peroxidase activity and stained with biotin-conjugated anti-CD68 (Serotec) or anti-CD4 (BD Pharmingen). HRP-streptavidin (Vector) and DAB substrate were added and positive cells developed a brown color. Sections were counterstained with Mayer's hematoxylin solution (Sigma). The numbers of CD68+ or CD4+ cells were averaged from 10 randomly selected glomeruli under high power field for each kidney section. Detection of glomerular immune complex deposits were assessed on frozen sections stained with anti-IgG2a or anti-C3 FITC as previously described(15 (link)).Formalin-fixed inter-scapular skin sections were stained with H&E.
Publication 2010
Biotin Capillaries Cardiac Arrest CD4 Positive T Lymphocytes Cells Cloning Vectors Complex, Immune Eosin Fluorescein-5-isothiocyanate Formalin Frozen Sections Glomerulonephritis Hyalin Substance Hyperplasia IgG2A Inflammation Kidney Kidney Glomerulus Macrophage Mesangial Cells, Kidney Mesangiums, Glomerular Periodic Acid Peroxidase Peroxide, Hydrogen Scapula Sclerosis Skin Sodium Azide Streptavidin
Kidney (4 mm) was fixed in 10% formalin, paraffin embedded, and stained with Periodic acid–Schiff (PAS) stain (Sigma-Aldrich) for the semi-quantitative evaluation21 (link),22 (link). Glomerular injury was determined by percentage of moderate-severe glomerular injury (mesangial expansion >50%, crescentic formation and/or glomerulosclerosis) at 400x magnification and interstitial injury was semi-quantitatively estimated at 200x magnification using 10 randomly selected fields by the criteria of damage-area (cell infiltration, interstitial edema and tubular injuries) as following: 0, <5% area; 1, 5–10% area; 2, 10–25% area; 3, 25–50% area; and 4, >50% area. The immune complex deposition in glomeruli was visualized by immunofluorescence prepared in Cryogel (Leica Biosystems, Richmond, IL, USA), stained with goat anti-mouse IgG (Alexa Fluor 488, Abcam, Cambridge, MA, USA) and detected by ZEISS LSM 800 (Carl Zeiss, Germany). Spleen apoptosis was detected by immunohistochemistry with anti-active caspase 3 antibody (Cell Signaling Technology, Beverly, MA, USA) (expressed as positive cells per high-power field)22 (link) and flow cytometry. The fluorochrome-conjugated antibodies against different molecules were used including; i) apoptosis indicators, annexin V and propidium iodide (PI), ii) B220 (B cell) and iii) F4/80 (macrophage) (BioLegend, San Diego, CA, USA) with FlowJo software23 (link).
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Publication 2020
alexa fluor 488 Annexin A5 anti-IgG Antibodies Antibodies, Anti-Idiotypic Apoptosis B-Lymphocytes Caspase 3 Cells Complex, Immune Cryogels Edema Flow Cytometry Fluorescent Dyes Formalin Goat Immunofluorescence Immunohistochemistry Injuries Kidney Kidney Glomerulus Macrophage Mesangiums, Glomerular Mus Paraffin Periodic Acid Propidium Iodide Spleen

Most recents protocols related to «Mesangiums, Glomerular»

Sections of 4–5 µm thickness were processed for immunohistochemistry as described by [30 (link)]. Briefly, the sections were deparaffinized, rehydrated, and rinsed in tap water. Then the slides were embedded in 3% hydrogen peroxide for 10 minutes, immersed in antigen retrieval solution and later blocking of nonspecific protein binding was done by incubation in 10% normal goat serum in PBS for 1 hours at room temperature. The slides were incubated with the diluted primary antibody against α- smooth muscle actin (Rabbit Polyclonal antibody, Cat: RB-9010-P0; Lab-Vision, Fremont, CA, USA) at dilution of 1:200 for 2 hours to identify mesangial cell proliferation in paraffin sections.
Publication 2023
Actins Antigens Cardiac Arrest Cell Proliferation Goat Immunoglobulins Immunohistochemistry Mesangiums, Glomerular Paraffin Peroxide, Hydrogen Rabbits Serum Smooth Muscles Technique, Dilution Vision
Kidney tissues were fixed in formalin, and the paraffin blocks were sliced into 4 µm sections. The kidney section was stained with PAS stain Kit (395B, Sigma-Aldrich) or H&E staining Kit (ab245880, Abcam, Cambridge, MA). Glomeruli area and mesangial matrix area were observed under a digital microscope. The mesangial matrix index was calculated by 100 × mesangial matrix area/glomeruli area. For assessing H&E staining results, the following factors were used to estimate tubulointerstitial lesions for HE staining: a, atrophy, expansion, and casts of tubules; b, tubulointerstitial fibrosis and infiltration of inflammatory cells. The specific grades varied from zero to four points: zero for no changes, one for changes of 25% or less in the section, two for changes of 25–50%, three for changes of 50–75%, and four for changes of 75–100%.
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Publication 2023
Atrophy CD3EAP protein, human Cells Fibrosis Formalin Inflammation Kidney Kidney Glomerulus Mesangiums, Glomerular Microscopy Paraffin Stains Tissues
The SPGJ procedure is illustrated in Figure 1. A separate part of the stomach at the junction of the gastric corpus and antrum or about 5 cm from the upper edge of the tumor with a linear stapler, leaving the 2–3 cm wide gastric corpus near the lesser curvature. Cut an opening at the margin of the greater curvature of the proximal stomach. Cut another opening on the opposing mesangial limbus of the jejunum 5–10 cm away from the ligament of flexion. Then a linear stapler is inserted, and the greater curvature and the jejunum are side-to-side anastomosed at the back of the colon. The opening was closed by continuous suture with barbed wire.
The CGJ procedure is illustrated in Figure 2. Cut an opening at the lowermost point of the greater curvature or about 5 cm from the upper edge of the tumor. Cut another opening on the opposing mesangial limbus of the jejunum 5–10 cm away from the ligament of flexion. Then a linear stapler is inserted, and the greater curvature and the jejunum are side-to-side anastomosed at the back of the colon. The opening was closed by continuous suture with barbed wire.
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Publication 2023
Antral CM 2-3 Colon Jejunum Ligaments Mesangiums, Glomerular Neoplasms Stomach Sutures
Renal biopsy specimens were collected via percutaneous needle biopsy. Paraffin-embedded 3-μm thick sections of renal specimens were stained with periodic acid Schiff, silver methenamine, and Masson trichrome. For the immunofluorescence analysis, frozen sections were subjected to fluorescence by fluorescein-conjugated goat IgG fraction to human IgG (F110FC, American Qualex, San Clemente, CA, USA), fluorescein-conjugated goat IgG fraction to human IgA (55077, MP Biomedicals, Solon, OH, USA), fluorescein-conjugated goat IgG fraction to human IgM (55153, MP Biomedicals), fluorescein-conjugated goat IgG fraction to human C3 (55167, MP Biomedicals), fluorescein-conjugated rabbit anti-human C1q (F0254, DAKO Japan Inc., Kyoto, Japan), and fluorescein-conjugated goat IgG fraction to human fibrinogen (55169, MP Biomedicals). IgAN or IgA vasculitis was diagnosed on the basis of mesangial cell proliferation in light microscopic findings, mesangial IgA deposition in immunofluorescence findings, and mesangial electron dense deposits in electron microscopic findings. Histological findings were evaluated according to the Oxford classification [39 (link)–41 (link)]. The Oxford classification of IgAN includes the following five histological variables: mesangial hypercellularity (M0/M1 lesion), segmental glomerulosclerosis (S0/S1 lesion), endocapillary hypercellularity (E0/E1 lesion), tubular atrophy/interstitial fibrosis (T0/T1/T2 lesion), and crescents (C0/C1/C2 lesion) [41 (link)]. We compared the renal histology in the cnm-positive S. mutans group with that in the cmn-negative S. mutans group using the Oxford classification in a blind test.
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Publication 2023
Atrophy Biopsy Blindness Electron Microscopy Fibrinogen Fibrosis Fluorescein Fluorescence Fluorescent Antibody Technique Frozen Sections Goat Henoch-Schoenlein Purpura Homo sapiens Hyperplasia IGA Glomerulonephritis Kidney Light Microscopy Mesangial Cells, Kidney Mesangiums, Glomerular Paraffin Embedding Periodic Acid Puncture Biopsy Rabbits Segmental glomerulosclerosis Solon
Human renal mesangial cells (HRMCs) were purchased from ScienCell Research (San Diego, United States), and the mouse mesangial cell (MMC) line SV40 MES-13 was purchased from the American Type Culture Collection (ATCC). All cells were cultured in DMEM (Gibco, United States) containing 10% fetal bovine serum (Gibco, Australia), streptomycin (100 μg/mL) and penicillin (100 U/mL) at 37°C and 5% CO2. Standard medium containing 5 mM D-glucose was used for the normal glucose (NG) condition. We added 20 mM glucose (yielding a final concentration of 25 mM) or mannitol for the high glucose (HG) condition or osmotic control (MA) and stimulated the cells for 48 h. The concentration was chosen based on our previous studies (Lu et al., 2015 (link); Wang et al., 2018a (link); Ma et al., 2019 (link)).
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Publication 2023
Cell Lines Fetal Bovine Serum Glucose Homo sapiens Mannitol Mesangial Cells, Kidney Mesangiums, Glomerular Mus Osmosis Penicillins Simian virus 40 Streptomycin

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More about "Mesangiums, Glomerular"

Mesangial cells play a vital role in the glomerular filtration process within the kidneys.
This specialized region, known as the mesangium, consists of mesangial cells and the surrounding extracellular matrix.
The mesangium is crucial for regulating glomerular filtration and maintaining the structural integrity of the glomerulus, the functional unit of the kidney.
Understanding the biology and pathology of the mesangium is essential for the study of various kidney diseases, such as glomerulonephritis and diabetic nephropathy.
Researchers can leverage the power of PubCompare.ai's AI-powered platform to optimize their research protocols focused on this key component of the renal glomerulus.
PubCompare.ai's innovative tool helps researchers locate the best protocols from literature, pre-prints, and patents through intelligent comparisons and analysis.
This cutting-edge technology can unlock the potential of research by providing researchers with the ability to explore and compare various experimental methodologies, including the use of FBS, Image-Pro Plus 6.0, SV40 MES 13 cells, DMEM, AX10 microscope, Image-Pro Plus software, Lipofectamine 2000, BX43 microscope, Cryo NHMC, and Penicillin/streptomycin.
By leveraging PubCompare.ai's AI-powered platform, researchers can streamline their investigations and gain valuable insights into the mesangial cells and the glomerular filtration process, ultimately advancing our understanding of kidney health and disease.