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P 

 Introduction

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Q  Introduction

S        $ "  -$        $ "  ""-    $" "              " &"&   $"     & $$ 1 @PA#2  &  -$ " "   &   "$    "        :  $   "         &    "   #       "$       - "  :         "   " @HA-  "  "      #  " "        &"        $"     # %  "     "    """$$   "  $ & -         "  -   $$"     "   O P  "      "   $   " " @QA# '    $   "$"     -     $ " M    "&      "            " $$"     " @RA#       & $$   "   $ &   "    -   $"        "&"#8         -    "  -   -  $ "   & $   ""&"#    &    & ($  "  $" -"      &"$      & : ")  $   " $$      : $ "  "   $    "   7    "     $   " "   $"  " &      "" "&"   M              -  &   "  "$       $    $ " $ "  $$#'&   &"""  &"$    $" "       "      "     $ @UA   $     """     "& " " $  $ @WA#  R Introduction

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   # 8   $$"  $   & -       "        &@VA-$   1 ($   " $" "   $" # '"    M    "        ($  ""   -  $   " $ & " "  -   -   "    #  - "    1          $$  -   "          "   "         # -  &"  1    -  "  "    &      &             &         # '  "-     $          "  ($  "-      &   "&"                $"(   )  1  # ; & "          $   ""   " $"   &    $   #    $ -&" $ ""&   :     &    "#8  ""-    " M $       "  $  "    $ "#      &   :                       "  " :      "     # 8 ""-    &     $  & " M     "&" "     " $-   $   $       $$$   $        @YA# $$"    !   ($" "    $" $ " M& " M   "          " $ %9-5   "# ;      "   $              $          &"&-    

U  Introduction

&         -  &    &  $ "# %   & $$     "         "    @XA#"&  $ "        :    $    "       (#     $"      $$"         "" &  " -     $ "    1 "&      "    "          ""  M   "    "    & " $&      $     @PIA &    "&" " "  " M  $  $ $ " #8     &     "- " : ;   ; " @PPA-  &         &                               $   $$"    @PHA#    $$"    8!    ($"   "     $&     " "      "" ($  ""        " $   !  *   : $ C#H   "# S "  "       &      -  $$        &   $   " $$  &      "   "  -    -                  & $  @PQA# 2&-  ($   $              " -    $"(  )   &"-   1   $"($$   " #&"$     "    &-      -   $   ) "  " $6       :" :"  &"  # 9 :) $$ &(   &"$&    "      )"&"  "  @PRA  -    - O ""  P "    @PUA  "  :       $   "  "   ""    : "     $$# -     "   (           -       M  "( "   $           )   

W Introduction

   "    #   -  "       $"(    " &        ($     "      $ "- "  -   "  & -    & $$     &"$  # S                        -     "      ""     "   :     ""      "  # 8 -          ($     $$       "&"-   "   $  &  "  $  @PWA#,  ($"  "    $$        "     ""     "        (   @PV)HPA#'"    & -    $$              $        $&     "       &    "  " "   &#

V  Introduction

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   $    "   $        "$  "   "           " $      $   $    $    " "" "#=(  @HWA# Y Introduction

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X  Introduction

$$"    $$   "  "    @QHA# 2&-  $ M &- $ "       $ "      $        & " " $$"   "  @QQA#   &     "" $$"       "$ $  " " "  #8    " "  ""$  " &  - $    "&    " "    -  "   $       " $  M        & $  @QRA# *$          QI[           " $   " "  $ " "        @QUA-    ""             & $        " :"   &"   &-" : "    "  " $   ""     @QWA   $$"      $&   "    " $   @HWA#     $  $               $  "     $   6 &-   "      ""  &$  $  #     &"  "            " $   " "#   :   "     " "   $@HXA#  %-*-*         :        "     "$   &-  "" $       "     &      $$#    -   "     "       $ -      " & &" "   "        " "  :    & & $   " "  # S  ""   &    &&        $  $    " $ " " "&  $$-   -$"   ""        ""  #

PI Introduction

#H#H#P ""   !"   " "    ""     "         "        $$   :   #          "       $   $$   " "      "" &          " ""   ($  1  #       ""     $&        &-  $   ""    )" : " " $$ -    $          " "- $  -  M-  $   $   "       ""         $   @QVA#    ""    "  $    $  & " " "        "     $$ -    - &      $        "    " : : $  ) $" $ @QYA$    ) "   @QXA#   "      "     ($"     "$   -   &  " "       $$         "   $  " : " @RIA# ,&-    $ "   $   "   $    $        $  "  $    " @RPA# ;      -  &  " "          $      " $      $     1     #      " "  -    - $  "           "        "    " $     $      (  M  &   " &  &" $$     @RHA#'   " $         ($   -& ""$   ""  " :     &$     "      -    -     " $       @RQA# 9        &   ""   &"$  " "        &   "@RRA-"    $)  " @RUA# PP  Introduction



 %          ""   #=(  @RWA#  "     ""$       ""    "" &   "$        "  #'"    M    " $$"     "  -    "      &"$      ""-         "  &      "$  @RVA#  $     " $$- &"  " " $   (         #  " =   " "    =  @RYA- &"$   =$            -   " & " "     " "       Q""R  " $  @RXA#'     $    !  @UIA-  $     92R ," "    $   &-    "     ! %      ! $  WH ""   HW ""     # 8 - !  $               "        !  '   &     "   ! %   @UPA#           &- $    "         "      ($  1        $  M   $-  &     "$   :      &   &   '*,=  $  -      -   " -(     ( $$    "   $ "      $ #          $   "

PH Introduction

 " & " "            -      & "     &""   &$ @UHA#  #H#H#H'     ""    $":"        "$       $  &"&   "          @UQA  &        "        -          "" " "     " "#  "    $     ($  "        $ &  - - """ $   $  -""      '*,=$$   $     " #S "" ""      $        "   $     "    $          $ "&    "  #     ""$ "   $& 6 "    ""  "          " - "  & " "   $ " #     -     ""  "  $    $          $"  : "       &-""      "&    " $     # ;      M-  $      "       ($"     $     "    -  "M  $ %9-6# - $ :     ""      ""   $ -         "  -  &  $"    & ""    $  &     "      " $"   &   # *     & -      " "     :           &        "   & "  -  &    $ & $     &  # 2&-  " :  $"    " ( &"-     $     :  $  #

PQ  Introduction

'     "  " " "   $       ($" $   $" :!2' @URA -       HIII "  -    "      !2'    $ 9 "  *"      &     $    $  ) $" $      "#'" $  $$ -      ""            "  $         " -   ""    "    $ %9-,#;    &  ""   " :=, " -   & =$       =, ) = -    $    =$  ," " "    =,  @UUA# S     "   ""   $ -       $ " " & " "    1  &    &            $  - ""-  """ "  ""    H#U ""      @UWA#     "      "   " :  $   !*%!#  $ "          &" $  & $     $ " "     "  &     $&       "  9%$  #   $            -  "          " -      """  : "  @UVA#       $ "  &$$     -" :S  @UYA,**@UXA      ""   "  # S   -    -  $$      &"$   %   ," " *  &     +  HIIX    "       "    "    $  # '""         (            $$$ "   "     $& 6 "   "#    -        &   ) $     $  "   "$$  -  6 $      "    "" $  $"  $ &   "  " $ #  PR Introduction

%-*-5      & $" &&       &"  " "       "     M         "   ""$  "    $  """    :   $     # 8    ""-  $        $        - "- "--"H--  #'""  $&        $  $  " "       " : -    ""  &      #8 -   ""   ""$  Q*    $ -   ""6 "  H* $"- $      $       $     $ #; -    &                         -    $      $   ""& " - $ " "      "     1 # ;  "   $     $   " :           " "  -    ""     $  " : "    " 1       "-  "     $   " : " "   "  ""       ""   $     &   "# '   -   "   & " "   1"    "    "   #-    $$  &   :   "&   $ "#  !'-     "     !   '$$"   -: HIII HIIU  !' "    !6     "    1 " "-  !'  "   -  "   )$$       "   #     $ - $      " M     - &      -    ""     " M      1 -       $       $  " ""   " 1$$   #    "$     " M  ( " ""     (  "    "       -  -         PU  Introduction

   "   $ #S         "     "   -  :&"$#8   " "  -          HU   "   "$     PR      "      &        - ""    &"   $    Y   "   "  #'   - "      &     "  :    #      $  &  :    P#Q&PIX $ -  " ""    VU   PIX $  @WIA# '   -   "   %&"$  " #    "  -         1 ()"&"     " "    "&"      )  "    -         " 1     " "#    -        "&"   $        "   $   " "-        "  $        $   "   $ -$ &"# -    ( "&" 1  )     " ":- "-   $" " "   -$ &"# S      " " "" " " &"  ""  -        $  &  &"   $& "            $         " $   # ;     "  ""$ "" $     $     "  " $  -  :         M                  "    $   "   $ " "        $ #      $-  $                   &     $ "-        "" -        $$"  "   &   $          &     "  "$   " $    #

PW Introduction

%&" "  & " "   "  $ "             "       ""     #% $" :;$  "@WPA"""   " "  $      $"  "  $ #    $ -      "  $  $"         $   '(  @WHA-   $&    "    " $$"   &"$  "     "    #

PV  Introduction

  %-54   

 %-5-,     8  :   $" -     " " $     $""$  $   " & (    @WQA-      "" $   $ #     $        $    "      " &  # % $  "   "  -" :   "     :"  - " $ " M   "M        " "   "   "" M#'   $$  "  &"& "  ""  "   ""  " $    " "  $  $      "- "      :   $ #'"" $        M              "     "" ""     $"  """ # '   ""     " " $      :     " $             "" ""   " :      "$ """ "#$  -  "    "   "  "    "        $ " M$ :       $    " Q*  #  "     &       $    &            ""             &      "   1     $   & #  "   -       $ "   $       $- "  1 -   "- $"     $   "    ""         :        "     "  "                 & #   &"  "   $      "   

" " $ #        "" :   "     M $-    " ""    - "  "  

PY Introduction

  " $ -    - )$   $" $      :   "   $ &   /   $   #S "  $"  $    "   &      @WRA  $  - ""  "   "" $         ""   M# ,   UIII  M- UIII  "    $ -    PIII )$   $"  $     " $ &    "   "&"   M &" "    #            "$ -$        M$      "  ($   $           "     &    $"(     # 2&-  ($   $     "      $"       "" $  " &   "       &  $ : - "          -   "  ]  "-&   "    (  #  %-5-*      !           "  -    " "     &"&  "" " " $ #          "" &  1 : "        $     & " "        $  #'" & &         "-   "   $"  -   "     """         #  #Q#H#P8  "   " "     M  $            &"$   "              "  $   $ " "   "" "  - "" $    """ "    @WUA#  &     "     "  -     & $    $     & $     

PX  Introduction

 " $  "   $  #        $        $  -            $  &"    PUI  " $  "":  " &@WWA# %&"  &"         "      - : $  &" $" -     "         @WVA#2&-  $$   "                           "  $   $-    &  "        "     -        $              # *$       "  "  $           -    "          &"      "  @WYA# '2-    -   "" :     "      $        PR#UII  &  P#PUI1   "  $  HHW $ "     "  PHR      "  @WXA# S   1   $$     - $8-    &   %     - $     "  PH#III  "  $  "  1   "   "  " @VIA# $     $   :           "     "         1 -        """ #8    1  $         $  :    # '  $$   -  "  $"    -  "    $"       1 "        $"( @VPA#   $ $    $$    $  "Q*$   "         1  &" & $"   "    "  @VHA# ,&-       &"   1    $   " :"     #

HI Introduction

 %  &&   " ) $    $   #=(  @VQA  ;  $           -     M"       " "#      &  : $   " $  - & $"   ""         "      #  = M 9 "    &"$  = M       =   @VRA-     M       " "         M          "M# '"  =           $ & M-=      $   M    "M   #           M    "M    ""  & =  #$  -   "      RPUI     $  "  "   " M# '   "" :   "                !2'-  ""    "     " "! "#     "   $ - & " RII     " $           $"        "" "  $     $  "&"    "# $   &$      :   "

HP  Introduction

"&     :"  ""  ""  "      &  - &    "" $ #"    "       & "$   :    PU "$   6 "! " "& @VUA# '     "     &$     " -   ""$ $$     $     $$    "&"      M   ""          # 2&-  "    &$        $  "      "   "- $         $   "  -       &          #   "-   $$      " "      $    ; ; "  $ -             " M   -    "  

" " $ - " "      """ $    " :   $     :  #S   (   &    $  1  ($    -       "$                         "           $   @VWA "      $"(   """      @VVA# 

HH Introduction

 2   "   :) $  "    $  #=(  @VYA

 '""  " &  &"  " "           M    $   " : ! !        @VXA  T= T  =  "$        @YIA#

 #Q#H#H%  "   $$ $         " $$     Q*    "    $     "    $     1 # $ $"  $ "   :    

HQ  Introduction

   $    "   "  :    $   $  " $  "   "  "":" :#2&-  $"(      "   " )    "$  $  :   6 &&  "    &     "   "   & - " : *9'  $ & "        "     @VYA " "" " " # ;  $"  $    "    $    $    &  $    &"  "&"   $     1      @YPA# 2&-    "   ($  ""         &  "      -     &   "" (   $  -    "&       &$ "    " "   @YHA# ' ""-      &   "         1  "   -     Q*"      PI#III-&     $  & 6  1  "  &$  &@YQA#8   -   " HUI$     "    :  $&"         Q*      " :   "  @YRA# 8 -&     )    "  $    &  $"    &"$      $   "  "  $ "  "      "        "    $   &  "  @YUA# 

HR Introduction

 Q*"    ""  "$     "   &$ : #=(   @YWA    " -    ($  "             "    &        1  $      " """ <)  ""$-9,$  $  " ""    $#<)  ""$    &"$      -   ""  $ &   &    "&"     ( $ $  ($     "" M         $"      "   $  " @YVA#  $&      "             $$"       M  ""           M    "   "       6 & &"$  !* - $     :-   &  :& 9  "   # '"   !*       " $6   ($     

HU  Introduction

    " VI @YYA-  ($  "            YI     &    $ &      -&    & $  @YXA#S     (     + HIPI   &       $    - "  *9'- 9'- $      ( $"(-       $  $     #       -    !*  "  &      $       :    -        "  "-

" "  " $ ""    # '                "    "    "($  & " M$       $   "  $  " :!* "      &   " " #$$"       "      " " :   $   -  "  M "  :    $ -       &  ""&  "  " :      "  $ -  $ -  "  )$   $"  $ #   $$"    8! $         "      "         "&          " - "  $           &         $  $     "" "&"#     $$   8!      M     $       "  "        "M                  "&"#  ""      "  $ %9-*# '    "-   "                "    & $     " " $  @XIA# 2&-     " &   $$           "      $   M  " ($  ""-   &      "& $& "$ $-   "    " "":         "" M@XPA# 

HW Introduction

#Q#H#Q!"      &" &  &$ -$   " $$"       $  "    $ #    -    & $"   $" $  -       $"      "      $ "   $  :$  $    "   &  "     #     - "  $         $          &"& $  "   & $  #        : "   $$          &  :   @XHA- $"  "   $    $     1 " $ &"      "   "  "     - &    "  $  -   "  1 - )    ""    &  ""    @XQA#8 -   $"  & $&    & "         &      1  @XRA      (        -         $    "     $       $ -    "   "       M$ @XUA"" &"$ &"&"   "  "  @XW-XV-XQA# ' "  &    "     M     :    &  ,    "#  HIIH @XYA# T   $ " M  M      &      M     $$ "      $  "      "           " "    $ "" "&  $   &"&   " """ $ # '   UII :     :  "  X " $   M       $ #



HV  Introduction

 $     : #=(  @XYA  ;     :    "  $ -    "     $  " "    "     " "         &"&    $ " "$    *9'    $   "&"# '  "   " "        $  $  "$ $$     *9')  $$         $  @XXA#       $$ -  P#XXX  9 "  $  9 "      "   $ "     RY :      "  $  @PIIA "       ""  1 " &    " #     " $"     -*     &    &   "   %  *        "   "          $ $  :    $ "    

HY Introduction

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HX  Introduction

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QQ  Introduction

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QR Introduction

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QU  Introduction

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QV  Introduction

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Anticipating drug side effects by comparative pharmacology

        Chemogenomics Laboratory, Research Program on Biomedical Informatics (GRIB), Institut Municipal d’Investigació Mèdica and Universitat Pompeu Fabra, 08003 Barcelona, Catalonia, Spain    Drugs having similar side-effect profiles were successfully shown recently to have also affinity for a common target. Going one step further, this review highlights the fact that drugs connected by side-effect similarity have also similar affinity profiles over multiple targets. Given the current low levels of completeness of drug-target interaction data, one may expect that the number of common targets for which drug neighbours in a side-effect network have some level of affinity is likely to increase in the near future. This observation suggests that preclinical comparative pharmacology, based on in vitro data but supported strongly by modern in silico methods for drug metabolite prediction and affinity profiling, represents an attractive strategy to anticipate clinical drug side effects.

                             

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 %  "#$%&'()*#+,-  Figure 1. Network of drugs connected by side-effect similarity, with focus on a particular network path composed of 14 drugs (left). For five drug-pair connections, the probability of sharing a target higher than 25% and side effect similarity P value below 0.1, as reported in reference [21], is also shown (values in italics).

Figure 2. The process of transferring the primary target of a drug to its side-effect neighbours in the network path.

Figure 3. The bioactivity profiles over ten targets of four drugs connected by side-effect similarity (see Figure 2). The dashed line indicates the activity level of 10 μM. Arrows mark current missing data for which low micromolar affinity is predicted.



 %*

0.32

0.30

0.40

0.57 0.54

FIGURE 1

 %+

5-HT2A SERT D3 O CF CF 3 3 N S O N N N H N O N O N O N N H

SERT D3 SERT Cl fluvoxamine pergolide fluoxetine

5-HT2A=8.1 SERT=8.4 D3=8.4 SERT=8.2 SERT=6.7 5-HT =4.9 SERT=? D =5.7 (from ref. [21]) 2A 3 D =? 3

FIGURE 2

 %1

9,0 nefazodone 9,0 fluvoxamine

8,0 8,0

7,0 7,0

6,0 6,0 pActivity pActivity

5,0 5,0

4,0 4,0 5-HT1A 5-HT2A 5-HT2C a1A a2A D3 H1 DAT NET SERT 5-HT1A 5-HT2A 5-HT2C a1A a2A D3 H1 DAT NET SERT Targets Targets

9,0 pergolide 9,0 fluoxetine

8,0 8,0 7,0 7,0

6,0 6,0

pActivity pActivity

5,0 5,0

4,0 4,0 5-HT1A 5-HT2A 5-HT2C a1A a2A D3 H1 DAT NET SERT 5-HT1A 5-HT2A 5-HT2C a1A a2A D3 H1 DAT NET SERT Targets Targets

FIGURE 3

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50.0

40.0

30.0

20.0 % Chemical probes Chemical %

10.0

0.0 23-5>5 No. Targets   ( ,-!  "  1"   "$ $       :        $ "       



  F   N 9.0  O N  8.0   7.0   6.0  pActivity (pKi) 5.0   4.0  3.0  SERT CHRM1 HRH1 HTR2C ADRA1A NET DAT  Target  HN    9.0

 8.0   7.0   6.0  pActivity (pKi) 5.0   4.0  3.0  NET SERT HTR2A HRH1 DAT ADRB1  Target   ( *-= "$ $    $ "   - ($"    "$    



 

5.0   4.5 

4.0   3.5  3.0   pSelectivity 2.5  2.0   1.5  1.0  7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0  Maximum pActivity Enzymes  2 targets  3-5 targets GPCRs  >5 targets Other   (  5- *        " $    $       $     " &    # % M   "         & " "# "   " "    6 $    "     $   #" $    "  "$  (   "#  



    N  9.0  N CF3

 S 8.0  7.0 

6.0  pActivity (pKi) 5.0  4.0  3.0  DRD2 HTR2A HRH1 DRD1 SIGMAR1 MDR1 TPR  Target   ( 6- "$M - ($" " $"$ #   



    

Other 600 GR EC 500

400

300

No. Profiles 200

100

0 12345>5 Probe level   ( :- $ " &   "$ #! "&"         &"&  $ $ "  I 



    

 N H2N N H2N N  N N  2 H 3  O  N N 1:  S O  4 O  N

 N N N N N N S  H N S H N O N N  Cl  5 6: tiotidine

H N  2 H N  N  S N NH N NH N NH  7: impromidine 8:   O

H2N N N  N N H  9: 10    ( ;-     $"   "$    "    $ 



 

 ' 94   

PRV 

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PUP References

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PUH References

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PUQ References

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PUR References

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PUU References

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PUV References

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PUX References

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PWI References

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PWP References

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PWV References

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PWY References

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PWX References

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