बरकरार अंग संस्कृति के लिए गोजातीय टेल intervertebral डिस्क की तैयारी
Summary
इस प्रोटोकॉल एक अंग संस्कृति के लिए अनुत्रिक गोजातीय intervertebral डिस्क के लिए कटाई के लिए तकनीक दिखाता है<em> इन विट्रो में</em> अंग संस्कृति.
Abstract
The intervertebral disc (IVD) is the joint of the spine connecting vertebra to vertebra. It functions to transmit loading of the spine and give flexibility to the spine. It composes of three compartments: the innermost nucleus pulposus (NP) encompassing by the annulus fibrosus (AF), and two cartilaginous endplates connecting the NP and AF to the vertebral body on both sides. Discogenic pain possibly caused by degenerative intervertebral disc disease (DDD) and disc herniations has been identified as a major problem in our modern society. To study possible mechanisms of IVD degeneration, in vitro organ culture systems with live disc cells are highly appealing. The in vitro culture of intact bovine coccygeal IVDs has advanced to a relevant model system, which allows the study of mechano-biological aspects in a well-controlled physiological and mechanical environment. Bovine tail IVDs can be obtained relatively easy in higher numbers and are very similar to the human lumbar IVDs with respect to cell density, cell population and dimensions. However, previous bovine caudal IVD harvesting techniques retaining cartilaginous endplates and bony endplates failed after 1-2 days of culture since the nutrition pathways were obviously blocked by clotted blood. IVDs are the biggest avascular organs, thus, the nutrients to the cells in the NP are solely dependent on diffusion via the capillary buds from the adjacent vertebral body. Presence of bone debris and clotted blood on the endplate surfaces can hinder nutrient diffusion into the center of the disc and compromise cell viability. Our group established a relatively quick protocol to “crack”-out the IVDs from the tail with a low risk for contamination. We are able to permeabilize the freshly-cut bony endplate surfaces by using a surgical jet lavage system, which removes the blood clots and cutting debris and very efficiently reopens the nutrition diffusion pathway to the center of the IVD. The presence of growth plates on both sides of the vertebral bone has to be avoided and to be removed prior to culture. In this video, we outline the crucial steps during preparation and demonstrate the key to a successful organ culture maintaining high cell viability for 14 days under free swelling culture. The culture time could be extended when appropriate mechanical environment can be maintained by using mechanical loading bioreactor. The technique demonstrated here can be extended to other animal species such as porcine, ovine and leporine caudal and lumbar IVD isolation.
Protocol
Discussion
सफल अंग संस्कृति के लिए पहला कदम को यकीन है कि explant दूषित नहीं होना चाहिए है. पूंछ है इससे पहले कि आप प्रक्रिया के साथ शुरू चमड़ी किया जाना चाहिए. कोई भी जानवर एक बाँझ प्रयोगशाला में लाया बाल संदूषण के मामल…
Divulgations
The authors have nothing to disclose.
Acknowledgements
इस परियोजना स्विस राष्ट्रीय विज्ञान फाउंडेशन (# SNF 310030-127586/1) द्वारा समर्थित किया गया.
Materials
| Name of the reagent | Company | Catalogue number | Comments (optional) |
| Fresh bovine intervertebral disc tissue from bovine tails, from local slaughter house (ideally within hours post-mortem and without skin). | |||
| Pulsavac Plus AC System | Zimmer inc., Switzerland | 00-5150-486-01 | Best performance with the hip-spray head and with AC power supply (the one with the 8 AA battery pack does also work but is less convenient) |
| High Capacity Fan Spray w/Splash Shield, 12.7cm length | Zimmer inc., Switzerland | 00-5150-175-00 | There are several spray heads available, we tested this one successfully |
| Scalpel blades #22 and #10 | Swann-Morton, England | #10: 0201 #22: 0208 |
|
| Scalpel blade holder # 3 and #4 | Hausmann, Germany | #3: 06.103.00 #4: 06.104.00 |
|
| Lutz industrial blade | Lutz, Germany | 1022.0884 | |
| Phosphate buffered Saline (PBS) | Invitrogen, Switzerland | 10010-023 | |
| Dulbecco’s Modified Eagle Medium (DMEM) | Gibco, Switzerland | 11960-044 | |
| Lactated Ringer’s solution (without glucose) | Bichsel, Switzerland | 133 0002 | |
| 6-well multi-well plate | TPP, Switzerland | 92006 | |
| Betadine solution | Mundipharma, Switzerland | 10055025 | |
| Surgical skin marker | Porex Surgical, Switzerland | 9560 | |
| Large cutting board | Any brand is possible | ||
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