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Hettler SA, Picascia T, Pastene DO, Vajpayee S, Perciaccante R, Yard BA, Gretz N, Krämer BK. Hyperfiltration can be detected by transcutaneous assessment of glomerular filtration rate in diabetic obese mice. Am J Physiol Cell Physiol 2023; 325:C1558-C1566. [PMID: 37955125 DOI: 10.1152/ajpcell.00483.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 11/14/2023]
Abstract
We addressed if hyperfiltration can be assessed transcutaneously in male diabetic obese mice (BTBRob/ob) at 12 and 24 wk and how this relates to glomerular parameters indicative for hyperfiltration. Transcutaneous assessment of FITC-Sinistrin clearance [transcutaneous assessment of glomerular filtration rate (tGFR)] was compared against classical plasma clearance. Kidney from SV620C-01-PEI perfused mice were harvested at 24 wk and processed for tissue clearing and classical histology. Perfusion patterns of glomerular capillaries, glomerular size, and vasodilation of the afferent arterioles were assessed. Although at 12 wk FITC-Sinistrin half-life (t1/2) for both tGFR and plasma clearance suggested hyperfiltration, this was not significant anymore at 24 wk. In kidneys of diabetic mice the diameter of the afferent arteriole was significantly larger and positively correlated with glomerular size. Glomerular perfusion pattern in these mice was heterogeneous ranging from non- to well-perfused glomeruli. Nonperfused glomerular areas displayed a strong periodic acid-Schiff's (PAS) positive staining. Collectively our data demonstrate that tGFR is a valid method to detect hyperfiltration. Hyperfiltration occurs early in BTBRob/ob mice and disappears with disease progression as a consequence of a reduced filtration surface. It remains to be assessed if tGFR is also a valid method in diabetic mice with severely compromised renal function.NEW & NOTEWORTHY tGFR measurement is a relatively new method to assess kidney function in conscious rodents, which can be repeated multiple times in the same animal to track the course of the disease and/or the effect of potential treatments. Since the literature was inconclusive on the suitability of this technique in obese mice, we validated it for the first time against classical plasma clearance in the commonly used BTBRob/ob mouse model.
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Affiliation(s)
- Steffen A Hettler
- Vth Medical Department, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Tiziana Picascia
- Medical Research Center, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Diego O Pastene
- V Medical Department, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | | | | | - Benito A Yard
- V Medical Department, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
- European Center for Angioscience, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Norbert Gretz
- Medical Research Center, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
| | - Bernhard K Krämer
- V Medical Department, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
- European Center for Angioscience, University Hospital Mannheim, Heidelberg University, Mannheim, Germany
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Sun Q, Picascia T, Khan AUM, Brenna C, Heuveline V, Schmaus A, Sleeman JP, Gretz N. Application of ethyl cinnamate based optical tissue clearing and expansion microscopy combined with retrograde perfusion for 3D lung imaging. Exp Lung Res 2020; 46:393-408. [PMID: 33043719 DOI: 10.1080/01902148.2020.1829183] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
PURPOSE 3 D imaging of the lung is not a trivial undertaking as during preparation the lung may collapse. Also serial sections and scans followed by 3 D reconstruction may lead to artifacts. The present study aims to figure out the best way to perform 3 D imaging in lung research. MATERIALS AND METHODS We applied an optical tissue clearing (OTC) method, which uses ethyl cinnamate (ECi) as a fast, nontoxic and cheap clearing solvent, for 3 D imaging of retrograde perfused lungs by laser confocal fluorescence microscopy and light sheet fluorescence microscopy. We also introduced expansion microscopy (ExM), a cutting-edge technique, in 3 D imaging of lungs. We examined and compared the usefulness of these techniques for 3 D lung imaging. The ExM protocol was further extended to paraffin-embedded lung metastases blocks. RESULTS The MHI148-PEI labeled lung vasculature was visualized by retrograde perfusion combined with trachea ligation and ECi based OTC. As compared with trans-cardiac perfusion, the retrograde perfusion results in a better maintenance of lung morphology. 3 D structure of alveoli, vascular branches and cilia in lung were revealed by immunofluorescence staining after ExM. 3 D distribution of microvasculature and neutrophil cells in 10 years old paraffin-embedded lung metastases were analyzed by ExM. CONCLUSIONS The retrograde perfusion combined with trachea ligation technique could be applied in the lung research in mice. 3 D structure of lung vasculature can be visualized by MHI148-PEI perfusion and ECi based OTC in an efficient way. ExM and immunofluorescence staining protocol is highly recommended to perform 3 D imaging of fresh fixed lung as well as paraffin-embedded lung blocks.
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Affiliation(s)
- Quanchao Sun
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Institute for Medical Technology, University of Heidelberg, and University of Applied Sciences, Mannheim, Germany
| | - Tiziana Picascia
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Institute for Medical Technology, University of Heidelberg, and University of Applied Sciences, Mannheim, Germany
| | - Arif Ul Maula Khan
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Institute for Medical Technology, University of Heidelberg, and University of Applied Sciences, Mannheim, Germany
| | - Cinzia Brenna
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Institute for Medical Technology, University of Heidelberg, and University of Applied Sciences, Mannheim, Germany
| | - Vincent Heuveline
- Director of the Computing Centre, Heidelberg University, Heidelberg, Germany
| | - Anja Schmaus
- European Center for Angioscience (ECAS), Medical Faculty Mannheim, University of Heidelberg, CBTM, Mannheim, Germany.,Institute of Biological and Chemical Systems-Biological Information Processing (IBCS-BIP), Karlsruhe Institute for Technology (KIT), Karlsruhe, Germany
| | - Jonathan P Sleeman
- European Center for Angioscience (ECAS), Medical Faculty Mannheim, University of Heidelberg, CBTM, Mannheim, Germany.,Institute of Biological and Chemical Systems-Biological Information Processing (IBCS-BIP), Karlsruhe Institute for Technology (KIT), Karlsruhe, Germany
| | - Norbert Gretz
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany.,Institute for Medical Technology, University of Heidelberg, and University of Applied Sciences, Mannheim, Germany
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Brenna C, Khan AUM, Picascia T, Sun Q, Heuveline V, Gretz N. New technical approaches for
3D
morphological imaging and quantification of measurements. Anat Rec (Hoboken) 2020; 303:2702-2715. [DOI: 10.1002/ar.24463] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 03/31/2020] [Accepted: 04/10/2020] [Indexed: 01/31/2023]
Affiliation(s)
- Cinzia Brenna
- Medical Research Center, Medical Faculty MannheimUniversity of Heidelberg Mannheim Germany
| | - Arif ul Maula Khan
- Medical Research Center, Medical Faculty MannheimUniversity of Heidelberg Mannheim Germany
| | - Tiziana Picascia
- Medical Research Center, Medical Faculty MannheimUniversity of Heidelberg Mannheim Germany
| | - Quanchao Sun
- Medical Research Center, Medical Faculty MannheimUniversity of Heidelberg Mannheim Germany
- Department of Thoracic Surgery, Union HospitalTongji Medical College, Huazhong University of Science and Technology Wuhan China
| | - Vincent Heuveline
- University Computing CenterUniversity of Heidelberg Heidelberg Germany
| | - Norbert Gretz
- Medical Research Center, Medical Faculty MannheimUniversity of Heidelberg Mannheim Germany
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