2014 spring poster

1
RESEARCH POSTER PRESENTATION DESIGN © 2012 www.PosterPresentations.com 4. Collec/on of spinal cord (for quan/fica/on of absolute virus copy number by real/me PCR assay) and necropsy (210 dpi). INTRODUCTION OBJECTIVES METHODS RESULTS ANALYSIS: Quality Control References Acknowledgement This work was supported by the Dartmouth College Undergraduate Research David C. Hodgson Endowment award grant. Laboratory of Neuroimmunology, LONI Department of Neurology, DartmouthHitchcock Medical Center Joyce Pan, Lauren M. Keyes, Francesca Gilli, Andrew R. Pachner Monitoring Theiler’s Murine Encephalomyeli/s Virus (TMEV) infec/on status in mouse central nervous system based on analysis of an/bodies in serum and cerebrospinal fluid 2. Collec/on of blood sample (serum) at three /me points (48 dpi, 92 dpi, and 210 dpi) via eye bleeding. 1. Intracranial Infec/on of TMEV: VirusInduces demyelina/on. Virusspecific CD4+ Tcells targe/ng virus, which chronically persists in the CNS. 3. Collec/on of cerebrospinal fluid (CSF) for total IgG analysis (just before necropsy, 210 dpi). y = 0.9603x + 8172 R² = 0.82285 0 20,000 40,000 60,000 80,000 100,000 120,000 140,000 160,000 180,000 0 20,000 40,000 60,000 80,000 100,000 120,000 140,000 Joyce Francesca Interpersonal Repetability: Francesca vs. Joyce y = 0.8107x + 11346 R² = 0.82989 0 20,000 40,000 60,000 80,000 100,000 120,000 140,000 0 20,000 40,000 60,000 80,000 100,000 120,000 Joyce 1 Joyce 2 Intrapersonal Repetability: Joyce vs. Joyce 0 5,000 10,000 15,000 20,000 25,000 30,000 35,000 40,000 45,000 50,000 Total CSF IgG (ng/mL) CSF Total IgG Vehicle Teriflunomide Sham 0 20000 40000 60000 80000 100000 120000 140000 160000 180000 200000 Vehicle Teriflunomide Sham An‘bodies ‘ters 48 Days 92 Days 210 Days Serum An‘TMEV An‘bodies 0 50,000 100,000 150,000 200,000 250,000 300,000 350,000 400,000 Virus Copies Spinal Cord: Virus Copy Number Vehicle Teriflunomide Sham Andrew R. Pachner, Libin Li, Kavitha narayan, Intrathecal antibody production in an animal model of multiple sclerosis, Journal of Neuroimmunology, Volume 185, Issues 1-2, April 2007, pages 57-63, ISSN 0165-5782, http://dx.doi.org/10.1016/j.jneuroim. 2007.01.017. Gilli, F. (2014). Data Presentation. Hanover, NH. Dartmouth College. CONCLUSION The two most commonly studied categories of mouse models of mul/ple sclerosis (MS) include: 1. The purely autoimmune Experimental Autoimmune/Allergic Encephalomyeli/s (EAE), and 2. The virally induced chronic demyelina/ng disease models, with the main model of Theiler’s Murine encephalomyeli/s Virus Demyelina/ng Disease (TMEVIDD). TMEVIDD features a chronic progressive and lasts for the en/re lifespan in suscep/ble mice. Since it is not possible for a single mouse model to capture and represent all aspects of human MS disease, it is important to choose a model that best serves the purpose of the study, since our aim is to study neurodegenera/on and disease progression, we chose to focus on TMEVIDD. TMEV is injected intracranially to the central nervous system (CNS) of SJLstrain mice, a strain suscep/ble to the disease. TMEV infec/on is characterized by a biphasic CNS inflammatory disease. During the early phase of infec/on, the virus infects primarily neurons and glia of the gray maher resul/ng in CNS inflamma/on and behavioral signs of encephali/s. In contrast, the late phase of the disease is characterized by inflammatory demyelina/on of the white maher with macrophages/monocyte and glial infec/on. Over the course of the disease, it is important to ensure the proper infec/on of TMEV in the mice, therefore several diagnos/cs were used to evaluate the virus persistence in the CNS. Three different /ssues were used for analysis: blood (serum), cerebrospinal fluid (CSF), and spinal cord. The methods of analysis involved for the three /ssues were, An/TMEV an/bodies ELISA analysis, total IgG ELISA analysis, and real/me PCR to quan/fy the absolute virus copy number, respec/vely. The CSF and spinal cord were collected at the necropsy, while blood samples were collected serially on day 48, day 92, and day 210 (day of necropsy) post infec/on. Fortyfive mice were analyzed: N=8 sham treated; N=18 Vehicletreated, N=19 Teriflunomidetreated. Using three different /ssues and diagnos/c methods we aim to evaluate the TMEV infec/on in a mouse model of chronic progressive MS. Furthermore, we wish to assess whether monitoring the systemic an/body produc/on may represent the infec/ous state in the CNS. From the data, it is found that systemic an/body produc/on is able to represent the infec/ous state in the CNS. ELISA has shown a good repeatability and consistent method of evalua/on from the quality control analysis. To ensure the repeatability and consistency of the An/TMEV ELISA data, an interpersonal and intrapersonal comparison were made.

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Page 1: 2014 Spring Poster

RESEARCH POSTER PRESENTATION DESIGN © 2012

www.PosterPresentations.com

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ORIGINAL   DISTORTED  

Corner  handles  

Good

 prin

/ng  qu

ality

 

Bad  prin/n

g  qu

ality

 

4.    Collec/on  of  spinal  cord  (for  quan/fica/on  of  absolute  virus  copy  number  by  real-­‐/me  PCR  assay)  and  necropsy  (210  dpi).  

INTRODUCTION  

OBJECTIVES  

METHODS   RESULTS   ANALYSIS:  Quality  Control    

References  

Acknowledgement  This work was supported by the Dartmouth College Undergraduate Research David C. Hodgson Endowment award grant.

Laboratory  of  Neuroimmunology,  LONI  Department  of  Neurology,  Dartmouth-­‐Hitchcock  Medical  Center  

Joyce  Pan,  Lauren  M.  Keyes,  Francesca  Gilli,  Andrew  R.  Pachner  

Monitoring  Theiler’s  Murine  Encephalomyeli/s  Virus  (TMEV)  infec/on  status  in  mouse  central  nervous  system  based  on  analysis  of  an/bodies  in  serum  and  cerebrospinal  fluid  

2.  Collec/on  of  blood  sample  (serum)  at  three  /me  points  (48  dpi,  92  dpi,  and  210  dpi)  via  eye  bleeding.  

1.    Intracranial  Infec/on  of  TMEV:  Virus-­‐Induces  demyelina/on.  Virus-­‐specific  CD4+  T-­‐cells  targe/ng  virus,  which  chronically  persists  in  the  CNS.  

3.  Collec/on  of  cerebrospinal  fluid  (CSF)  for  total  IgG  analysis  (just  before  necropsy,  210  dpi).  

y  =  0.9603x  +  8172  R²  =  0.82285  

0  

20,000  

40,000  

60,000  

80,000  

100,000  

120,000  

140,000  

160,000  

180,000  

0   20,000   40,000   60,000   80,000   100,000   120,000   140,000  

Joyce  

Francesca  

Interpersonal  Repetability:  Francesca  vs.  Joyce  

y  =  0.8107x  +  11346  R²  =  0.82989  

0  

20,000  

40,000  

60,000  

80,000  

100,000  

120,000  

140,000  

0   20,000   40,000   60,000   80,000   100,000   120,000  

Joyce  1  

Joyce  2  

Intrapersonal  Repetability:  Joyce  vs.  Joyce  

0  

5,000  

10,000  

15,000  

20,000  

25,000  

30,000  

35,000  

40,000  

45,000  

50,000  

Total  CSF  IgG  (n

g/mL)  

CSF  Total  IgG  

Vehicle   Teriflunomide   Sham  

0  

20000  

40000  

60000  

80000  

100000  

120000  

140000  

160000  

180000  

200000  

Vehicle   Teriflunomide   Sham  

An`b

odies  `

ters  

48  Days   92  Days   210  Days  

Serum  An`-­‐TMEV  An`bodies  

0  

50,000  

100,000  

150,000  

200,000  

250,000  

300,000  

350,000  

400,000  

Virus  C

opies  

Spinal  Cord:  Virus  Copy  Number  

Vehicle   Teriflunomide   Sham  

Andrew R. Pachner, Libin Li, Kavitha narayan, Intrathecal antibody production in an animal model of multiple sclerosis, Journal of Neuroimmunology, Volume 185, Issues 1-2, April 2007, pages 57-63, ISSN 0165-5782, http://dx.doi.org/10.1016/j.jneuroim. 2007.01.017. Gilli, F. (2014). Data Presentation. Hanover, NH. Dartmouth College.

CONCLUSION  

       The  two  most  commonly  studied  categories  of  mouse  models  of  mul/ple  sclerosis  (MS)  include:  1.    The  purely  autoimmune  Experimental  Autoimmune/Allergic  Encephalomyeli/s  (EAE),  and  2.  The  virally  induced  chronic  demyelina/ng  disease  models,  with  the  main  model  of  Theiler’s  Murine  encephalomyeli/s  Virus  Demyelina/ng  Disease  (TMEV-­‐IDD).    TMEV-­‐IDD  features  a  chronic-­‐progressive  and  lasts  for  the  en/re  lifespan  in  suscep/ble  mice.    Since  it  is  not  possible  for  a  single  mouse  model  to  capture  and  represent  all  aspects  of  human  MS  disease,  it  is  important  to  choose  a  model  that  best  serves  the  purpose  of  the  study,  since  our  aim  is  to  study  neurodegenera/on  and  disease  progression,  we  chose  to  focus  on  TMEV-­‐IDD.              TMEV  is  injected  intracranially  to  the  central  nervous  system  (CNS)  of  SJL-­‐strain  mice,  a  strain  suscep/ble  to  the  disease.    TMEV  infec/on  is  characterized  by  a  biphasic  CNS  inflammatory  disease.    During  the  early  phase  of  infec/on,  the  virus  infects  primarily  neurons  and  glia  of  the  gray  maher  resul/ng  in  CNS  inflamma/on  and  behavioral  signs  of  encephali/s.    In  contrast,  the  late  phase  of  the  disease  is  characterized  by  inflammatory  demyelina/on  of  the  white  maher  with  macrophages/monocyte  and  glial  infec/on.              Over  the  course  of  the  disease,  it  is  important  to  ensure  the  proper  infec/on  of  TMEV  in  the  mice,  therefore  several  diagnos/cs  were  used  to  evaluate  the  virus  persistence  in  the  CNS.    Three  different  /ssues  were  used  for  analysis:  blood  (serum),  cerebrospinal  fluid  (CSF),  and  spinal  cord.  The  methods  of  analysis  involved  for  the  three  /ssues  were,    An/-­‐TMEV  an/bodies  ELISA  analysis,  total  IgG  ELISA  analysis,  and  real-­‐/me  PCR  to  quan/fy  the  absolute  virus  copy  number,  respec/vely.    The  CSF  and  spinal  cord  were  collected  at  the  necropsy,  while  blood  samples  were  collected  serially  on  day  48,  day  92,  and  day  210  (day  of  necropsy)  post  infec/on.    Forty-­‐five  mice  were  analyzed:  N=8  sham  treated;  N=18  Vehicle-­‐treated,  N=19  Teriflunomide-­‐treated.    

         Using  three  different  /ssues  and  diagnos/c  methods  we  aim  to  evaluate  the  TMEV  infec/on  in  a  mouse  model  of  chronic  progressive  MS.                Furthermore,  we  wish  to  assess  whether  monitoring  the  systemic  an/body  produc/on  may  represent  the  infec/ous  state  in  the  CNS.  

         From  the  data,  it  is  found  that  systemic  an/body  produc/on  is  able  to  represent  the  infec/ous  state  in  the  CNS.    ELISA  has  shown  a  good  repeatability  and  consistent  method  of  evalua/on  from  the  quality  control  analysis.      

To  ensure  the  repeatability  and  consistency  of  the  An/-­‐TMEV  ELISA  data,  an  interpersonal  and  intrapersonal  comparison  were  made.