human
***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: BACKGROUND Not all patients with rheumatoid arthritis can tolerate or respond to methotrexate , a st and ard treatment for this disease . There is evidence that antitumour necrosis factor alpha ( TNFalpha ) is efficacious in relief of signs and symptoms . We therefore investigated whether infliximab , a chimeric human-mouse anti-TNFalpha monoclonal antibody would provide additional clinical benefit to patients who had active rheumatoid arthritis despite receiving methotrexate .  METHODS In an international double-blind placebo-controlled phase III clinical trial , 428 patients who had active rheumatoid arthritis , who had received continuous methotrexate for at least 3 months and at a stable dose for at least 4 weeks , were r and omised to placebo ( n=88 ) or one of four regimens of  infliximab  at weeks 0 , 2 , and 6 . Additional infusions of the same dose were given every 4 or 8 weeks thereafter on a background of a stable dose of methotrexate ( median 15 mg/week for > or = 6 months , range 10 - 35 mg/wk ) . Patients were assessed every 4 weeks for 30 weeks . FINDINGS At 30 weeks , the American College of Rheumatology ( 20 ) response criteria , representing a 20 % improvement from baseline , were achieved in 53 , 50 , 58 , and 52 % of patients receiving 3 mg/kg every 4 or 8 weeks or 10 mg/kg every 4 or 8 weeks , respectively , compared with 20 % of patients receiving placebo plus methotrexate ( p<0.001 for each of the four infliximab regimens vs placebo ) . A 50 % improvement was achieved in 29 , 27 , 26 , and 31 % of infliximab plus methotrexate in the same treatment groups , compared with 5 % of patients on placebo plus methotrexate ( p<0.001 ) . Infliximab was well-tolerated ; withdrawals for adverse events as well as the occurrence of serious adverse events or serious infections did not exceed those in the placebo group . INTERPRETATION During 30 weeks , treatment with infliximab plus methotrexate was more efficacious than methotrexate alone in patients with active rheumatoid arthritis not previously responding to methotrexate Objective : To examine the impact of the combination of infliximab plus methotrexate ( MTX ) on the progression of structural damage in patients with early rheumatoid arthritis ( RA ) . Methods : Subanalyses were carried out on data for patients with early RA in the Anti-TNF Therapy in RA with Concomitant Therapy ( ATTRACT ) study , in which 428 patients with active RA despite MTX therapy received placebo with MTX ( MTX-only ) or infliximab 3 mg/kg or 10 mg/kg every ( q ) 4 or 8 weeks with MTX ( infliximab plus MTX ) for 102 weeks . Early RA was defined as disease duration of 3 years or less ; 82 of the 428 patients ( 19 % ) met this definition . Structural damage was assessed with the modified van der Heijde-Sharp score . The changes from baseline to week 102 in total modified van der Heijde-Sharp score were compared between the infliximab plus MTX groups and the MTX-only group . Results : The erosion and joint space narrowing scores from baseline to week 102 in the cohort of patients with early RA decreased significantly in each infliximab dose regimen compared with the MTX-only regimen . Consistent benefit was seen in the joints of both h and s and feet . Conclusions : Infliximab combined with MTX inhibited the progression of structural damage in patients with early RA during the 2 year period of treatment . Early intervention with infliximab in patients with active RA despite MTX therapy may provide long term benefits by preventing radiographic progression and preserving joint integrity Objective : To evaluate the effect of infliximab dose escalation in incomplete responders in a r and omised controlled trial . Methods : 141 rheumatoid arthritis ( RA ) patients treated with infliximab for 12 months ( 3 mg/kg ; intervals 0 , 2 , 6 and then 8 weeks ) who responded to the drug ( disease activity score in 28 joints ( DAS28 ) decrease > 1.2 ) but who were not in remission ( DAS28 > 2.6 ) were enrolled into the study . Patients were r and omly assigned into arm A , 3 mg/kg , and arm B , 5 mg/kg infliximab every 8 weeks . Outcome measures included the DAS28 , its components and C-reactive protein ( CRP ) . Results : There were no significant differences in changes in the DAS28 , its components , or CRP in patients in arms A and B during the 12 months of treatment . All patients showed a DAS28 decrease greater than 0.6 after 28 weeks . Eleven patients interrupted therapy in arm A and 14 in arm B. Infusion reactions and non-serious adverse events were observed in 4.2 % and 28.2 % of arm A patients and in 7.2 % and 47.8 % of arm B patients . The frequency of serious adverse events was comparable between arms A and B ( 16.9 % and 15.9 % , respectively ) , and the frequency of serious infections was not significantly greater in the higher dose group ( 5.8 % ) than in the lower dose group ( 5.6 % ) . Conclusions : In this setting , increasing the infliximab dose from 3 mg/kg to 5 mg/kg in RA patients with residual disease activity did not improve efficacy but moderately increased toxicity . These data indicate that a switch to another biological treatment would be a more appropriate strategy in incomplete responders Objectives : This double-blind trial evaluated the efficacy and safety of abatacept or infliximab vs placebo . The primary objective of this study was to evaluate the mean change from baseline in Disease Activity Score ( based on erythrocyte sedimentation rates ; DAS28 ( ESR ) ) for the abatacept vs placebo groups at day 197 . Methods : Patients with rheumatoid arthritis ( RA ) and an inadequate response to methotrexate ( MTX )  were r and omised 3:3:2 to abatacept ( ∼10 mg/kg every 4 weeks , n = 156 ) , infliximab ( 3 mg/kg every 8 weeks , n = 165 ) , or placebo ( every 4 weeks , n = 110 ) and background MTX .  Safety and efficacy were assessed throughout the study . Results : Similar patient demographics and clinical characteristics were present at baseline between groups , with mean scores of ∼1.7 for HAQ-DI and 6.8 for DAS28 ( ESR ) . At 6 months , mean changes in DAS28 ( ESR ) were significantly greater for abatacept vs placebo ( –2.53 vs –1.48 , p<0.001 ) and infliximab vs placebo ( –2.25 vs –1.48 , p<0.001 ) . For abatacept vs infliximab treatment at day 365 , reductions in the DAS28 ( ESR ) were –2.88 vs –2.25 . At day 365 , the following response rates were observed for abatacept and infliximab , respectively : American College of Rheumatology ( ACR ) 20 , 72.4 and 55.8 % ; ACR 50 , 45.5 and 36.4 % ; ACR 70 , 26.3 and 20.6 % ; low disease activity score ( LDAS ) , 35.3 and 22.4 % ; DAS28-defined remission , 18.7 and 12.2 % ; good European League Against Rheumatism ( EULAR ) responses , 32.0 and 18.5 % ; and Health Assessment Question naire Disability Index ( HAQ-DI ) , 57.7 and 52.7 % . Mean changes in physical component summary ( PCS ) were 9.5 and 7.6 , and mental component summary ( MCS ) were 6.0 and 4.0 , for abatacept and infliximab , respectively . Over 1 year , adverse events ( AEs ) ( 89.1 vs 93.3 % ) , serious AEs ( SAEs ) ( 9.6 vs 18.2 % ) , serious infections ( 1.9 vs 8.5 % ) and discontinuations due to AEs ( 3.2 vs 7.3 % ) and SAEs ( 2.6 vs 3.6 % ) were lower with abatacept than infliximab . Conclusions : In this study , abatacept and infliximab ( 3 mg/kg every 8 weeks ) demonstrated similar efficacy . Overall , abatacept had a relatively more acceptable safety and tolerability profile , with fewer SAEs , serious infections , acute infusional events and discontinuations due to AEs than the infliximab group . Trial registration number : NCT00095147 OBJECTIVE Anti-tumor necrosis factor alpha agents are among the most effective therapies for rheumatoid arthritis ( RA ) . However , their optimal use is yet to be determined . This 12-month double-blind study attempted remission induction using st and ard therapy with or without infliximab in patients with early , poor-prognosis RA . The primary end point was synovitis ( measured by magnetic resonance imaging [ MRI ] ) . Clinical observations continued to 24 months . METHODS All patients had fewer than 12 months of symptoms . Assessment s included full metrologic evaluation , laboratory tests , radiographs , functional evaluation using the Health Assessment Question naire ( HAQ ) , and quality of life measurement using the RA Quality of Life ( RAQoL ) question naire . MRI was performed at 0 , 4 , 14 , and 54 weeks ; MR images were scored blindly . Patients received methotrexate ( MTX ) and were r and omized to receive either infliximab or placebo for 12 months . RESULTS Twenty patients were recruited ( mean age 52 years , mean symptom duration 6 months , mean C-reactive protein level 42 mg/liter , and 65 % rheumatoid factor positive ) . At 1 year , all MRI scores were significantly better , with no new erosions in the infliximab plus MTX group ; a greater percentage of infliximab plus MTX-treated patients fulfilled the American College of Rheumatology ( ACR ) 50 % and 70 % improvement criteria ( 78 % versus 40 % in the placebo plus MTX group and 67 % versus 30 % , respectively ) and had a greater functional benefit ( P < 0.05 for all comparisons ) . Importantly , at 1 year after stopping induction therapy , response was sustained in 70 % of the patients in the infliximab plus MTX group , with a median Disease Activity Score in 28 joints ( DAS28 ) of 2.05 ( remission range ) . At 2 years , there were no significant between-group differences in the DAS28 , ACR response , or radiographic scores , but differences in the HAQ and RAQoL scores were maintained ( P < 0.05 ) . CONCLUSION Remission induction with infliximab plus MTX provided a significant reduction in MRI evidence of synovitis and erosions at 1 year . At 2 years , functional and quality of life benefits were sustained , despite withdrawal of infliximab therapy . These data may have significant implication s for the optimal use of expensive biologic therapies OBJECTIVE To compare the benefits of initiating treatment with methotrexate ( MTX ) and infliximab ( anti-tumor necrosis factor alpha [ anti-TNFalpha ] monoclonal antibody ) with those of MTX treatment alone in patients with rheumatoid arthritis ( RA ) of < or =3 years ' duration . METHODS RA patients were eligible if they had active disease and no prior treatment with MTX or a TNFalpha inhibitor . One thous and forty-nine patients were r and omly assigned in a 4:5:5 ratio to 3 treatment groups : MTX-placebo , MTX-3 mg/kg infliximab , and MTX-6 mg/kg infliximab . MTX dosages were rapidly escalated to 20 mg/week , and infliximab or placebo infusions were given at weeks 0 , 2 , and 6 , and every 8 weeks thereafter through week 46 . RESULTS At week 54 , the median percentage of American College of Rheumatology improvement ( ACR-N ) was higher for the MTX-3 mg/kg infliximab and MTX-6 mg/kg infliximab groups than for the MTX-placebo group ( 38.9 % and 46.7 % versus 26.4 % , respectively ; P < 0.001 for both comparisons ) . Patients in the MTX-3 mg/kg infliximab and MTX-6 mg/kg infliximab groups also showed less radiographic progression than those receiving MTX alone ( mean + /- SD changes in van der Heijde modification of the total Sharp score at week 54 : 0.4 + /- 5.8 and 0.5 + /- 5.6 versus 3.7 + /- 9.6 , respectively ; P < 0.001 for each comparison ) . In addition , physical function improved significantly more in the MTX-3 mg/kg infliximab and MTX-6 mg/kg infliximab groups than in the M 
    Output:
    
agent
***TASK*** the task is to summarize an input biomedical literature in six sentences 
    ***INPUT*** the input is a biomedical literature 
    ***OUTPUT*** the output is the summary of an input biomedical literature in six sentences 
    ***DOCUMENTATION*** 
    ***EXAMPLES*** 
    Input: BACKGROUND Not all patients with rheumatoid arthritis can tolerate or respond to methotrexate , a st and ard treatment for this disease . There is evidence that antitumour necrosis factor alpha ( TNFalpha ) is efficacious in relief of signs and symptoms . We therefore investigated whether infliximab , a chimeric human-mouse anti-TNFalpha monoclonal antibody would provide additional clinical benefit to patients who had active rheumatoid arthritis despite receiving methotrexate .  METHODS In an international double-blind placebo-controlled phase III clinical trial , 428 patients who had active rheumatoid arthritis , who had received continuous methotrexate for at least 3 months and at a stable dose for at least 4 weeks , were r and omised to placebo ( n=88 ) or one of four regimens of  infliximab  at weeks 0 , 2 , and 6 . Additional infusions of the same dose were given every 4 or 8 weeks thereafter on a background of a stable dose of methotrexate ( median 15 mg/week for > or = 6 months , range 10 - 35 mg/wk ) . Patients were assessed every 4 weeks for 30 weeks . FINDINGS At 30 weeks , the American College of Rheumatology ( 20 ) response criteria , representing a 20 % improvement from baseline , were achieved in 53 , 50 , 58 , and 52 % of patients receiving 3 mg/kg every 4 or 8 weeks or 10 mg/kg every 4 or 8 weeks , respectively , compared with 20 % of patients receiving placebo plus methotrexate ( p<0.001 for each of the four infliximab regimens vs placebo ) . A 50 % improvement was achieved in 29 , 27 , 26 , and 31 % of infliximab plus methotrexate in the same treatment groups , compared with 5 % of patients on placebo plus methotrexate ( p<0.001 ) . Infliximab was well-tolerated ; withdrawals for adverse events as well as the occurrence of serious adverse events or serious infections did not exceed those in the placebo group . INTERPRETATION During 30 weeks , treatment with infliximab plus methotrexate was more efficacious than methotrexate alone in patients with active rheumatoid arthritis not previously responding to methotrexate Objective : To examine the impact of the combination of infliximab plus methotrexate ( MTX ) on the progression of structural damage in patients with early rheumatoid arthritis ( RA ) . Methods : Subanalyses were carried out on data for patients with early RA in the Anti-TNF Therapy in RA with Concomitant Therapy ( ATTRACT ) study , in which 428 patients with active RA despite MTX therapy received placebo with MTX ( MTX-only ) or infliximab 3 mg/kg or 10 mg/kg every ( q ) 4 or 8 weeks with MTX ( infliximab plus MTX ) for 102 weeks . Early RA was defined as disease duration of 3 years or less ; 82 of the 428 patients ( 19 % ) met this definition . Structural damage was assessed with the modified van der Heijde-Sharp score . The changes from baseline to week 102 in total modified van der Heijde-Sharp score were compared between the infliximab plus MTX groups and the MTX-only group . Results : The erosion and joint space narrowing scores from baseline to week 102 in the cohort of patients with early RA decreased significantly in each infliximab dose regimen compared with the MTX-only regimen . Consistent benefit was seen in the joints of both h and s and feet . Conclusions : Infliximab combined with MTX inhibited the progression of structural damage in patients with early RA during the 2 year period of treatment . Early intervention with infliximab in patients with active RA despite MTX therapy may provide long term benefits by preventing radiographic progression and preserving joint integrity Objective : To evaluate the effect of infliximab dose escalation in incomplete responders in a r and omised controlled trial . Methods : 141 rheumatoid arthritis ( RA ) patients treated with infliximab for 12 months ( 3 mg/kg ; intervals 0 , 2 , 6 and then 8 weeks ) who responded to the drug ( disease activity score in 28 joints ( DAS28 ) decrease > 1.2 ) but who were not in remission ( DAS28 > 2.6 ) were enrolled into the study . Patients were r and omly assigned into arm A , 3 mg/kg , and arm B , 5 mg/kg infliximab every 8 weeks . Outcome measures included the DAS28 , its components and C-reactive protein ( CRP ) . Results : There were no significant differences in changes in the DAS28 , its components , or CRP in patients in arms A and B during the 12 months of treatment . All patients showed a DAS28 decrease greater than 0.6 after 28 weeks . Eleven patients interrupted therapy in arm A and 14 in arm B. Infusion reactions and non-serious adverse events were observed in 4.2 % and 28.2 % of arm A patients and in 7.2 % and 47.8 % of arm B patients . The frequency of serious adverse events was comparable between arms A and B ( 16.9 % and 15.9 % , respectively ) , and the frequency of serious infections was not significantly greater in the higher dose group ( 5.8 % ) than in the lower dose group ( 5.6 % ) . Conclusions : In this setting , increasing the infliximab dose from 3 mg/kg to 5 mg/kg in RA patients with residual disease activity did not improve efficacy but moderately increased toxicity . These data indicate that a switch to another biological treatment would be a more appropriate strategy in incomplete responders Objectives : This double-blind trial evaluated the efficacy and safety of abatacept or infliximab vs placebo . The primary objective of this study was to evaluate the mean change from baseline in Disease Activity Score ( based on erythrocyte sedimentation rates ; DAS28 ( ESR ) ) for the abatacept vs placebo groups at day 197 . Methods : Patients with rheumatoid arthritis ( RA ) and an inadequate response to methotrexate ( MTX )  were r and omised 3:3:2 to abatacept ( ∼10 mg/kg every 4 weeks , n = 156 ) , infliximab ( 3 mg/kg every 8 weeks , n = 165 ) , or placebo ( every 4 weeks , n = 110 ) and background MTX .  Safety and efficacy were assessed throughout the study . Results : Similar patient demographics and clinical characteristics were present at baseline between groups , with mean scores of ∼1.7 for HAQ-DI and 6.8 for DAS28 ( ESR ) . At 6 months , mean changes in DAS28 ( ESR ) were significantly greater for abatacept vs placebo ( –2.53 vs –1.48 , p<0.001 ) and infliximab vs placebo ( –2.25 vs –1.48 , p<0.001 ) . For abatacept vs infliximab treatment at day 365 , reductions in the DAS28 ( ESR ) were –2.88 vs –2.25 . At day 365 , the following response rates were observed for abatacept and infliximab , respectively : American College of Rheumatology ( ACR ) 20 , 72.4 and 55.8 % ; ACR 50 , 45.5 and 36.4 % ; ACR 70 , 26.3 and 20.6 % ; low disease activity score ( LDAS ) , 35.3 and 22.4 % ; DAS28-defined remission , 18.7 and 12.2 % ; good European League Against Rheumatism ( EULAR ) responses , 32.0 and 18.5 % ; and Health Assessment Question naire Disability Index ( HAQ-DI ) , 57.7 and 52.7 % . Mean changes in physical component summary ( PCS ) were 9.5 and 7.6 , and mental component summary ( MCS ) were 6.0 and 4.0 , for abatacept and infliximab , respectively . Over 1 year , adverse events ( AEs ) ( 89.1 vs 93.3 % ) , serious AEs ( SAEs ) ( 9.6 vs 18.2 % ) , serious infections ( 1.9 vs 8.5 % ) and discontinuations due to AEs ( 3.2 vs 7.3 % ) and SAEs ( 2.6 vs 3.6 % ) were lower with abatacept than infliximab . Conclusions : In this study , abatacept and infliximab ( 3 mg/kg every 8 weeks ) demonstrated similar efficacy . Overall , abatacept had a relatively more acceptable safety and tolerability profile , with fewer SAEs , serious infections , acute infusional events and discontinuations due to AEs than the infliximab group . Trial registration number : NCT00095147 OBJECTIVE Anti-tumor necrosis factor alpha agents are among the most effective therapies for rheumatoid arthritis ( RA ) . However , their optimal use is yet to be determined . This 12-month double-blind study attempted remission induction using st and ard therapy with or without infliximab in patients with early , poor-prognosis RA . The primary end point was synovitis ( measured by magnetic resonance imaging [ MRI ] ) . Clinical observations continued to 24 months . METHODS All patients had fewer than 12 months of symptoms . Assessment s included full metrologic evaluation , laboratory tests , radiographs , functional evaluation using the Health Assessment Question naire ( HAQ ) , and quality of life measurement using the RA Quality of Life ( RAQoL ) question naire . MRI was performed at 0 , 4 , 14 , and 54 weeks ; MR images were scored blindly . Patients received methotrexate ( MTX ) and were r and omized to receive either infliximab or placebo for 12 months . RESULTS Twenty patients were recruited ( mean age 52 years , mean symptom duration 6 months , mean C-reactive protein level 42 mg/liter , and 65 % rheumatoid factor positive ) . At 1 year , all MRI scores were significantly better , with no new erosions in the infliximab plus MTX group ; a greater percentage of infliximab plus MTX-treated patients fulfilled the American College of Rheumatology ( ACR ) 50 % and 70 % improvement criteria ( 78 % versus 40 % in the placebo plus MTX group and 67 % versus 30 % , respectively ) and had a greater functional benefit ( P < 0.05 for all comparisons ) . Importantly , at 1 year after stopping induction therapy , response was sustained in 70 % of the patients in the infliximab plus MTX group , with a median Disease Activity Score in 28 joints ( DAS28 ) of 2.05 ( remission range ) . At 2 years , there were no significant between-group differences in the DAS28 , ACR response , or radiographic scores , but differences in the HAQ and RAQoL scores were maintained ( P < 0.05 ) . CONCLUSION Remission induction with infliximab plus MTX provided a significant reduction in MRI evidence of synovitis and erosions at 1 year . At 2 years , functional and quality of life benefits were sustained , despite withdrawal of infliximab therapy . These data may have significant implication s for the optimal use of expensive biologic therapies OBJECTIVE To compare the benefits of initiating treatment with methotrexate ( MTX ) and infliximab ( anti-tumor necrosis factor alpha [ anti-TNFalpha ] monoclonal antibody ) with those of MTX treatment alone in patients with rheumatoid arthritis ( RA ) of < or =3 years ' duration . METHODS RA patients were eligible if they had active disease and no prior treatment with MTX or a TNFalpha inhibitor . One thous and forty-nine patients were r and omly assigned in a 4:5:5 ratio to 3 treatment groups : MTX-placebo , MTX-3 mg/kg infliximab , and MTX-6 mg/kg infliximab . MTX dosages were rapidly escalated to 20 mg/week , and infliximab or placebo infusions were given at weeks 0 , 2 , and 6 , and every 8 weeks thereafter through week 46 . RESULTS At week 54 , the median percentage of American College of Rheumatology improvement ( ACR-N ) was higher for the MTX-3 mg/kg infliximab and MTX-6 mg/kg infliximab groups than for the MTX-placebo group ( 38.9 % and 46.7 % versus 26.4 % , respectively ; P < 0.001 for both comparisons ) . Patients in the MTX-3 mg/kg infliximab and MTX-6 mg/kg infliximab groups also showed less radiographic progression than those receiving MTX alone ( mean + /- SD changes in van der Heijde modification of the total Sharp score at week 54 : 0.4 + /- 5.8 and 0.5 + /- 5.6 versus 3.7 + /- 9.6 , respectively ; P < 0.001 for each comparison ) . In addition , physical function improved significantly more in the MTX-3 mg/kg infliximab and MTX-6 mg/kg infliximab groups than in the M 
    Output:
    