Правого желудочка систолическое давление измерений в сочетании с Harvest легких и иммунной образцы тканей у мышей
Summary
Конкретных и быстрых протоколов одновременно исследовать функцию правого сердца, воспаление легких, и иммунный ответ описывается как инструмент обучения. Видео и цифры описывают физиологию и микродиссекции методы в организованном командой подход, который адаптирован для использования в малых и больших размеров исследований.
Abstract
The function of the right heart is to pump blood through the lungs, thus linking right heart physiology and pulmonary vascular physiology. Inflammation is a common modifier of heart and lung function, by elaborating cellular infiltration, production of cytokines and growth factors, and by initiating remodeling processes 1.
Compared to the left ventricle, the right ventricle is a low-pressure pump that operates in a relatively narrow zone of pressure changes. Increased pulmonary artery pressures are associated with increased pressure in the lung vascular bed and pulmonary hypertension 2. Pulmonary hypertension is often associated with inflammatory lung diseases, for example chronic obstructive pulmonary disease, or autoimmune diseases 3. Because pulmonary hypertension confers a bad prognosis for quality of life and life expectancy, much research is directed towards understanding the mechanisms that might be targets for pharmaceutical intervention 4. The main challenge for the development of effective management tools for pulmonary hypertension remains the complexity of the simultaneous understanding of molecular and cellular changes in the right heart, the lungs and the immune system.
Here, we present a procedural workflow for the rapid and precise measurement of pressure changes in the right heart of mice and the simultaneous harvest of samples from heart, lungs and immune tissues. The method is based on the direct catheterization of the right ventricle via the jugular vein in close-chested mice, first developed in the late 1990s as surrogate measure of pressures in the pulmonary artery5-13. The organized team-approach facilitates a very rapid right heart catheterization technique. This makes it possible to perform the measurements in mice that spontaneously breathe room air. The organization of the work-flow in distinct work-areas reduces time delay and opens the possibility to simultaneously perform physiology experiments and harvest immune, heart and lung tissues.
The procedural workflow outlined here can be adapted for a wide variety of laboratory settings and study designs, from small, targeted experiments, to large drug screening assays. The simultaneous acquisition of cardiac physiology data that can be expanded to include echocardiography5,14-17 and harvest of heart, lung and immune tissues reduces the number of animals needed to obtain data that move the scientific knowledge basis forward. The procedural workflow presented here also provides an ideal basis for gaining knowledge of the networks that link immune, lung and heart function. The same principles outlined here can be adapted to study other or additional organs as needed.
Protocol
Representative Results
Discussion
Экспериментальные потока изложенные здесь обеспечивает быстрое и одновременное измерение давления правого желудочка систолическое и сбор образцов для анализа ответов в легких, сердца и иммунной системы у мышей. Процедура сочетает в себе сердце физиологии измерений, микро-рассечени?…
Disclosures
The authors have nothing to disclose.
Acknowledgements
Эта работа финансировалась Национальным институтом здоровья 1R21HL092370-01 (GG), 1R01 HL095764-01 (GG); R01HL082694 (JW), Американской ассоциации сердца, Учредителей филиал (0855943D, GG); Stony Wold – Герберт фонда, Нью-Йорк (SHP).
Materials
| Name | Company | Catalogue number | Comments (optional) |
| Reagents | |||
| 2-Methyl-2-butanol | Sigma-Aldrich | 152463 | |
| 2,2,2-Tribromoethanol | Sigma-Aldrich | T48402 | |
| disinfectant soap (Coverage Spray TB plus Steris) | Fisher Scientific | 1629-08 | |
| Ethyl Alcohol, 200 Proof, Absolute, Anhydrous ACS/USP Grade | PHARMCO-AAPER | 111000200 | Dilute to 70 % with distilled water |
| Formaldehyde solution | Sigma-Aldrich | F1635-500ML | Dilute to a 7-10 % formaldehyde concentration at a PBS concentration of 1x using PBS stock solution and water |
| Hanks solution, no calcium, magnesium | Fisher Scientific | 21-022-CV | |
| O.C.T | Tissue-Tek | 4583 | |
| Penicillin (10,000 U/ml) / Streptomycin (10,000 mg/ml) solution | Thermo Scientific | SV30010 | |
| Phosphate buffered saline (PBS), no calcium, no magnesium, 1x and 10x solutions | Fisher Scientific | ||
| Sodium pentobarbital 26% | Fort Dodge Animal Health | NDC 0856-0471-01 | |
| Labware | |||
| Plates 12, 24, 96 well | Falcon | ||
| Transfer Pipet | Fisher Scientific | 13-711-9BM | |
| Tube, EDTA coated | Sarstedt | 2013-08 | |
| Tubes 0.65 ml and 1.7 ml micro-centrifuge | VWR | ||
| Tubes 12 x 75 mm polypropylene | Fisher Scientific | 14-956-1D | |
| Tubes, various sizes, polypropylene | Fisher Scientific | ||
| Instruments | |||
| Forceps, Dumon #5 Fine | Fine Science Tools | 11254-20 | |
| Forceps, extra fine graefe -0.5 mm tips curved | Fine Science Tools | 11152-10 | |
| Forceps, extra fine graefe -0.5 mm tips straight | Fine Science Tools | 11150-10 | |
| Cannula 18 ga, 19 ga | BD | Precision Glide Needles | Cut to optimal length, blunted and outside rasped to create a rough outside surface. |
| Scissors, Dissector scissors-slim blades 9 cm | Fine Science Tools | 14081-09 | |
| Suture for BAL, braided silk suture, 4-0 | Fine Science Tools | SP116 | |
| Suture for right heart catheterization, braided silk suture, 6-0 | Teleflex medical | 18020-60 | |
| Syringe, 1 ml | BD | 309659 | |
| Equipment | |||
| Amplifier, PowerLab 4/30 | ADInstrument | Model ML866 | |
| Catheter, pressure F1.4 | Millar Instruments, Inc | 840-6719 | |
| Dissecting Microscope | Variscope | ||
| Forceps, Vannas spring scissors-2 mm blades | Fine Science Tools | 15000-00 | |
| Halogen Illuminated Desk Magnifier | Fisher Scientific | 11-990-56 | |
| Laptop computer | Asus | Model number A52F i5 processor; 15 inch | |
| Light Source | Amscope | HL-250-A | |
| Pressure Control Unit | Millar Instruments, Inc | PCU-2000 | |
| Software, Labchart-Pro V.7 | AD Instruments |
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