欢迎您, 登录 | 注册

首页 | English

X
加载中

Stereotaxic injection is an invaluable tool for the creation of site-targeted lesions, injection of anatomical tracers, gene delivery by recombinant adeno-associated viruses and lentiviruses in mice and rats. Stereotaxic injection of LPS or 6-hydroxydopamine has been used to establish animal models of Parkinson’s disease, the most common neurodegenerative movement disorder. This protocol allows the investigation of central nervous system development and disease mechanisms. This protocol has been developed and improved over the years by various researchers in Dr. Hong’s lab, especially Dr. Bin Liu.

Thanks for your further question/comment. It has been sent to the author(s) of this protocol. You will receive a notification once your question/comment is addressed again by the author(s).
Meanwhile, it would be great if you could help us to spread the word about Bio-protocol.

X

[Bio101] Stereotaxic Injection of LPS or Your Reagents of Choice into Rat Substantia Nigra
[Bio101] 向大鼠脑黑质立体定向注射LPS或其他测试试剂

神经科学 > 神经系统疾病
作者: Huiming Gao
Huiming GaoAffiliation: Neuropharmacology Section, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA
For correspondence: gao2@niehs.nih.gov
Bio-protocol author page: a17
11/20/2011, 5085 views, 0 Q&A, How to cite
DOI: http://dx.doi.org/10.21769/BioProtoc.154

[Abstract] Stereotaxic injection is an invaluable tool for the creation of site-targeted lesions, injection of anatomical tracers, gene delivery by recombinant adeno-associated viruses and lentiviruses in mice and rats. Stereotaxic injection of LPS or 6-hydroxydopamine has been used to establish animal models of Parkinson’s disease, the most common neurodegenerative movement disorder. This protocol allows the investigation of central nervous system development and disease mechanisms. This protocol has been developed and improved over the years by various researchers in Dr. Hong’s lab, especially Dr. Bin Liu.

Materials and Reagents

  1. Two-month-old male F344 rats, body weight 220-250 g
  2. Nembutal
  3. Carprofen
  4. Betadine
  5. 70% ethanol
  6. Phosphate buffered saline (PBS)
  7. 4% paraformaldehyde
  8. Ocular lubricant (Puralube)
  9. LPS (Escherichia coli 0111: B4) (Sigma-Aldrich)
  10. Sterile normal saline (0.9%) or other vehicle for your reagents
  11. LPS stock solution (see Recipes)

Equipment

  1. Motorized microinjection pump
  2. Small-animal stereotaxic apparatus (rat stereotaxic apparatus)
  3. Sicroinjection apparatus
  4. Dental drill and #1 burrs
  5. Microknife
  6. Scalpel (#10)
  7. Tissue forceps
  8. Gauze
  9. Stereotaxic frame
  10. Autoclips/suture materials

Procedure

  1. Animal anesthesia
    Nembutal 50 mg/kg intraperitoneal injection.

  2. Analgesic
    Carprofen, 5 mg/kg subcutaneous injection given at the time of surgery.

  3. Animal preparation
    1. Clip hair from the top of the head.
    2. Decontaminate skin with betadine followed by 70% ethanol.
    3. Administer the analgesic.
    4. Apply an ocular lubricant to prevent drying of the eyes.

  4. The coordinates used for the injection
    1. 4.8 mm posterior to the bregma.
    2. 1.7 mm lateral to the midline.
    3. 8.2 mm ventral to the surface of skull (Paxinos and Watson, 1986).
      Note: Differences in rat strains and age might require an adjustment to the coordinates for the injection.

  5. Surgical procedure
    1. Stabilize the head of the rat in the stereotaxic frame by using the ear bars. It is critical for the head to be positioned correctly by the ear bars. This can be verified by moving the nose right to left and the eye on the opposite side will squint.
      Note: There is no need to puncture eardrums for proper positioning.
    2. Make a 5 mm incision in the midline of the scalp.
    3. To prevent bleeding, gently scrape away the periosteal connective tissue that adheres to the bone with the blunt edge of the scalpel handle.
    4. The cranial sutures, bregma and lambda will be identified and a hole will be drilled with a small dental drill in the parietal skull plate (coordinates to be determined by stereotaxic atlas of rat brain).
    5. The hole will penetrate the full skull but not the dura mater. The dura is a very tough membrane but can easily be sliced with a sharp hypodermic needle.
    6. A pre-loaded 30 g a microinjection syringe attached to the microinjection apparatus is slowly inserted into the brain to predetermined depth through the opening in the skull. The injection will be conducted over a period of 2 min and controlled by a motorized microinjection pump.
    7. Repeat step 4 to step 6 to injection 2 µl of sterile normal saline (0.9%) into the opposite side of the brain.
    8. After the injection, the needle will be kept in place for 2 min.
    9. Remove the needle slowly out of the brain.
    10. Close the skin incision with autoclips or silk suture.

  6. Post-operative care
    1. Monitor animal until recovered from anesthesia.
    2. Monitor incision daily for any discharge, swelling or dehiscence.
    3. If animal appears unthrifty, inactive or reluctant to move, contact the Veterinary Medicine Section immediately.
    4. Authclip/suture removal in 10-14 days.
    5. At desired time points, the rat is anesthetized and transcardially perfused with PBS, followed by PBS-buffered 4% paraformaldehyde for immunohistochemistry.

Recipes

  1. LPS prepared as a stock solution of 5 mg/ml in sterile normal saline (0.9%) and stored in small aliquots at 4 °C.

References

  1. Liu, B., Jiang, J. W., Wilson, B. C., Du, L., Yang, S. N., Wang, J. Y., Wu, G. C., Cao, X. D. and Hong, J. S. (2000). Systemic infusion of naloxone reduces degeneration of rat substantia nigral dopaminergic neurons induced by intranigral injection of lipopolysaccharide. J Pharmacol Exp Ther 295(1): 125-132.
  2. Paxinos, G. and Watson, C. (1986). The Rat Brain in Stereotaxic Coordinates, 2nd edn. Orlando, FL: Academic Press.


How to cite this protocol: Gao, H. (2011). Stereotaxic Injection of LPS or Your Reagents of Choice into Rat Substantia Nigra. Bio-protocol Bio101: e154. DOI: 10.21769/BioProtoc.154; Full Text



可重复性反馈:

  • 添加图片
  • 添加视频

我们的目标是让重复别人的实验变得更轻松,如果您已经使用过本实验方案,欢迎您做出评价。我们鼓励上传实验图片或视频与小伙伴们(同行)分享您的实验心得和经验。(评论前请登录)

问题&解答:

  • 添加图片
  • 添加视频

(提问前,请先登陆)bio-protocol作为媒介平台,会将您的问题转发给作者,并将作者的回复发送至您的邮箱(在bio-protocol注册时所用的邮箱)。为了作者与用户间沟通流畅(作者能准确理解您所遇到的问题并给与正确的建议),我们鼓励用户用图片或者视频的形式来说明遇到的问题。由于本平台用Youtube储存、播放视频,作者需要google 账户来上传视频。


登陆 | 注册