Anti neutrophil cytoplasmic antibodies in children with ulcerative colitis. (1994 Dec)
Anti neutrophil cytoplasmic antibodies in children with ulcerative colitis . tests that positively identify individuals with ulcerative colitis , distinguishing them from patients with crohn disease or other causes of colitis , have not been reliable . genetic predisposition to inflammatory bowel diseases and genetic influence on immune regulation resulted in the clinical evaluation of potential serologic markers . In adults the presence of anti neutrophil cytoplasmic antibody ( ANCA ) in serum identifies patients with ulcerative colitis . In this study we demonstrated that high levels of ANCA are present in 83 of children and adolescents with ulcerative colitis . furthermore , the majority of patients with ulcerative colitis had a perinuclear pattern of these antibodies by indirect immunofluorescence . The combination of a positive ANCA and perinuclear indirect immunofluorescence pattern was 97 specific for ulcerative colitis . We conclude that determination of ANCA is a sensitive and specific clinical test for identification of children and adolescents with ulcerative colitis .

Antineutrophil cytoplasmic antibodies ( ANCA ) directed against cathepsin G in ulcerative colitis , crohn s disease and primary sclerosing … (1992 Nov)
antineutrophil cytoplasmic antibodies ( ANCA ) directed against cathepsin G in ulcerative colitis , crohn s disease and primary sclerosing cholangitis . autoantibodies directed against polymorphonuclear neutrophils ( PMN ) have been observed in serum from patients with ulcerative colitis ( UC ) , crohn s disease ( CD ) and primary sclerosing cholangitis ( PSC ) using indirect immunofluorescence and fixed granulocyte elisa . Our study demonstrates the presence in the serum of these patients of autoantibodies which bind to an azurophilic granule component distinct from proteinase 3 , elastase and myeloperoxidase . these autoantibodies thus belong to the ANCA family , but their antigen specificity differs from the already characterized ANCA antigens . We have found that the same ANCA antigen target , named UC antigen , was recognized by serum IgG from patients with UC , CD and PSC . It was purified by matrex Gel orange A dye affinity chromatography and subsequent immunoabsorption of contaminant proteinase 3 with immobilized anti proteinase 3 MoAb . The identity between this UC antigen and cathepsin G was demonstrated by their coelution from matrex Gel orange A column and the parallel titration of cathepsin G specific enzymatic activity and UC ANCA binding , both in partially purified UC antigen and in highly pure cathepsin G . furthermore , the use of cathepsin G elisa confirmed that UC , CD and PSC patients IgG did indeed bind to cathepsin G . comparison of the results obtained with azurophilic granule and cathepsin …

Mast cell and neuroendocrine cytoplasmic autoantigen ( s ) detected by monoclonal panca antibodies. (2000 Jan)
Mast cell and neuroendocrine cytoplasmic autoantigen ( s ) detected by monoclonal panca antibodies . panca is a marker antibody expressed in most patients with ulcerative colitis , and its cognate antigen is potentially an immunologic target in this disease . This study evaluates whether panca detects an autoantigen that is expressed in the colonic mucosa . immunohistochemistry of colon specimens with human panca monoclonal antibodies ( Fab 5 2 and 5 3 ) revealed a minor population of immunoreactive mucosal cells bearing a cytoplasmic vesicle antigen . By distribution , morphology , and tryptase expression , these were identified as mast cells . immunofluorescent analysis revealed similar immunoreactivity of mouse mast cell lines and human ku812 . western analysis of mouse mast cell lines revealed immunoreactive proteins , and these were distinct from previously proposed panca antigens ( histone H1 , HMG 1 and 2 , and neutrophil vesicle antigens ) . cognate antigen for Fab 5 2 and 5 3 was also expressed in other tissue mast cells , cerebellar neurons , and pancreatic islet cells . these findings identify a novel cytoplasmic autoantigen ( s ) associated with UC by its presence in colonic mucosa and recognition by a disease associated marker antibody .

Atypical , cytoplasmic and perinuclear anti neutrophil cytoplasmic antibodies in patients with inflammatory bowel disease. (1999 Jan)
atypical , cytoplasmic and perinuclear anti neutrophil cytoplasmic antibodies in patients with inflammatory bowel disease . atypical , cytoplasmic and perinuclear anti neutrophil cytoplasmic antibodies ( x , c and panca , respectively ) are associated with a variety of inflammatory diseases , including inflammatory bowel disease ( IBD ) . Anti neutrophil cytoplasmic antibodies are more common in patients with ulcerative colitis ( UC ) than in patients with crohn s disease ( CD ) . Most publications only refer to p and canca in relation to IBD . We have prospectively evaluated the reactivity of sera from 58 patients with IBD and 10 healthy controls against human neutrophils with emphasis on the distinction of the ANCA types . The sera were incubated with ethanol and formaldehyde fixed granulocytes to differentiate between c , p and xanca . The results showed that 10 of 24 patients with UC were positive for ANCA , whereas only one of 34 patients with CD was ANCA positive . these results correspond to a sensitivity of 42 , a specificity of 97 , a negative predictive value of 91 and a positive predictive value of 75 in UC . Of the 11 ANCA positive sera , two showed a cytoplasmic staining pattern , three showed a perinuclear and six an atypical staining pattern . The disease activity was not correlated to either the ANCA titre or to the presence of ANCA in the serum . In conclusion , ANCA are of limited value …

Effect of proctocolectomy on serum antineutrophil cytoplasmic antibodies in patients with chronic ulcerative colitis. (1995 Oct)
effect of proctocolectomy on serum antineutrophil cytoplasmic antibodies in patients with chronic ulcerative colitis . AIMS : To study the effect of proctocolectomy on the antineutrophil cytoplasmic antibody ( ANCA ) titres in association with ulcerative colitis . methods : serum samples were taken from 15 patients with ulcerative colitis immediately before and at a mean of 24 months after proctocolectomy . indirect immunofluorescence for ANCA and enzyme immunoassays for myeloperoxidase and proteinase 3 antibodies were employed . A liver biopsy was taken from every patient during the proctocolectomy , and serum liver enzyme activities were also determined . results : before proctocolectomy , 13 of the 15 patients had perinuclear antineutrophil cytoplasmic antibodies ( p ANCA ) . additionally , one patient had a low tire of classical cytoplasmic ANCA and one had granulocyte specific antinuclear antibodies . after proctocolectomy , the ANCA titres decreased in 10 patients , in two of whom they became negative . The titres remained the same in four patients with positive ANCA and increased twofold in one patient . Only one patient was proteinase 3 antibody positive and all 15 patients were myeloperoxidase antibody negative . The clinical condition improved in all patients , irrespective of the ANCA status after proctocolectomy . seven patients , all of whom were positive for p ANCA before proctocolectomy , had histological liver abnormalities . No correlation was observed between serum liver enzyme levels and ANCA staining patterns or titres . conclusions : proctocolectomy decreased the ANCA …

Relationship between ANCA and clinical activity in inflammatory bowel disease : variation in prevalence of ANCA and evidence of heterogeneity. (1997 Jul)
relationship between ANCA and clinical activity in inflammatory bowel disease : variation in prevalence of ANCA and evidence of heterogeneity . antineutrophil cytoplasmic antibodes ( ANCA ) are markers of necrotizing vasculitis . ANCA have been recently detected in the two forms of inflammatory bowel disease ( IBD ) , ulcerative colitis ( UC ) and crohn s disease ( CD ) . To assess the possible role of ANCA in the diagnosis and management of IBD we studied the prevalence of ANCA at diagnosis and during follow up in a group of 89 IBD patients . The relationship between ANCA and clinical features of IBD was investigated . ANCA assayed by indirect immunofluorescence were detected in 38 / 52 ( 73 ) of the UC patients but only 6 / 37 ( 16 . 6 ) of the CD patients ( P 0 . 005 ) and in none of the controls . In the UC group , but not in the CD group , there was a positive correlation between ANCA and disease activity . The sensitivity and specificity of ANCA for the diagnosis of UC were 73 and 83 . 7 respectively . The most commonly observed pattern of ANCA in IBD patients was perinuclear : in 84 of the UC and 66 . 6 of the CD patients positive for ANCA , respectively . however , careful comparison of IFL patterns revealed some distinct features of IBD associated ANCA when compared to vasculitis associated ANCA . …

High mobility group ( HMG ) non histone chromosomal proteins HMG1 and HMG2 are significant target antigens of perinuclear anti … (1999 Jun)
High mobility group ( HMG ) non histone chromosomal proteins HMG1 and HMG2 are significant target antigens of perinuclear anti neutrophil cytoplasmic antibodies in autoimmune hepatitis . background : High mobility group ( HMG ) non histone chromosomal proteins HMG1 and HMG2 have been identified as novel antigens of perinuclear anti neutrophil cytoplasmic antibodies ( p ancas ) , and the existence of anti HMG1 and anti HMG2 antibodies in a population of patients with ulcerative colitis has been reported . AIMS : To investigate whether HMG1 and HMG2 are target antigens for p ancas in autoimmune hepatitis ( AIH ) . patients : serum samples from 28 patients with AIH , 44 patients with primary biliary cirrhosis ( PBC ) , 27 patients with chronic hepatitis C , and 23 patients with chronic hepatitis B were tested . methods : ancas were detected by routine indirect immunofluorescence ( IIF ) . Anti HMG1 and anti HMG2 antibodies were assayed by enzyme linked immunosorbent assay . results : p ancas were detected in 89 ( 25 / 28 ) of patients with AIH , 36 ( 16 / 44 ) of patients with PBC , 11 ( 3 / 27 ) of patients with chronic hepatitis C , and 13 ( 3 / 23 ) of patients with chronic hepatitis B . Anti HMG1 and / or anti HMG2 antibodies were detected in 89 ( 25 / 28 ) of patients with AIH , 70 ( 31 / 44 ) …

Contribution of immunofluorescence to the identification and characterization of anti neutrophil cytoplasmic autoantibodies. (2001 Jan)
contribution of immunofluorescence to the identification and characterization of anti neutrophil cytoplasmic autoantibodies . The role of different fixatives . objective : To study the sera from selected groups of antineutrophil cytoplasmic antibody ( ANCA ) positive patients by means of the indirect immunofluorescence test ( ANCA IIF ) with different fixatives , in order to better discriminate among the various ancas ( Ag specificity and disease associations ) , especially those for which the antigen targets have not yet been identified . methods : eighty pathological serum samples and 15 normal sera were evaluated . pathological samples included sera from 30 ulcerative colitis ( UC ) ANCA positive patients , 30 P ANCA / myeloperoxidase ( MPO ANCA ) positive microscopic polyangiitis ( MPA ) patients , 10 C ANCA / proteinase 3 ( PR3 ANCA ) positive wegener s granulomatosis ( WG ) patients , and 10 antinuclear antibody ( ANA ) positive ( ANCA negative ) systemic lupus erythematosus ( SLE ) patients . ANCA were detected by IIF on ethanol , methanol and formalin fixed granulocytes and by elisas specific for MPO , PR3 , lactoferrin ( LF ) and bactericidal / permeability increasing protein ( BPI ) . additionally , sera were tested for the presence of antinuclear antibodies on IIF . results : 96 of serum samples from UC patients , positive by IIF on ethanol fixed granulocytes , became negative when tested on formalin fixed neutrophil slides . On the contrary , 95 …

Antineutrophil cytoplasmic antibodies : a still growing class of autoantibodies in inflammatory disorders. (1993 Jan)
antineutrophil cytoplasmic antibodies : a still growing class of autoantibodies in inflammatory disorders . antineutrophil cytoplasmic antibodies ( ANCA ) have been described as sensitive and specific markers for active wegener s granulomatosis ( WG ) . ANCA in WG produce a characteristic cytoplasmic staining pattern of neutrophils ( c ANCA ) and are directed against proteinase 3 ( Pr3 ) , a serine protease from the azurophilic granules . c ANCA , more or less equivalent to anti Pr3 , occur in more than 90 of patients with extended WG , in 75 of patients with limited WG without renal involvement , and in some 40 to 50 of patients with vasculitic overlap syndromes suggestive of WG such as microscopic polyarteritis . The presence of c ANCA is highly specific for those diseases ( greater than 98 ) . changes of levels of c ANCA precede disease activity and may be used as guidelines for treatment . antibodies producing a perinuclear staining of ethanol fixed neutrophils ( p ANCA ) occur in a wide range of diseases . They are directed against different cytoplasmic constituents of neutrophils . among those , antibodies to myeloperoxidase are found in patients with idiopathic crescentic glomerulonephritis , the churg strauss syndrome , polyarteritis nodosa with visceral involvement , and vasculitic overlap syndromes . their specificity for this group of necrotizing vasculitides is high ( 94 to 99 ) , although they may occur in patients with hydralazine induced glomerulonephritis , anti glomerular basement …

Anti neutrophil cytoplasmic antibodies ( ANCA ) : their detection and significance : report from workshops. (1994 Oct)
Anti neutrophil cytoplasmic antibodies ( ANCA ) : their detection and significance : report from workshops . Anti neutrophil cytoplasmic antibodies ( ANCA ) are antibodies directed against enzymes that are found mainly within the azurophil or primary granules of neutrophils . there are 3 types of ANCA that can be distinguished by the patterns they produce by indirect immunofluorescence when tested on normal ethanol fixed neutrophils . diffuse fine granular cytoplasmic fluorescence ( canca ) is typically found in wegener s granulomatosis , in some cases of microscopic polyarteritis and churg strauss syndrome , and in some cases of crescentic and segmental necrotising glomerulonephritis , but it is rare in other conditions . The target antigen is usually proteinase 3 . perinuclear fluorescence ( panca ) is found in many cases of microscopic polyarteritis and in other cases of crescentic and segmental necrotising glomerulonephritis . these antibodies are often directed against myeloperoxidase but other targets include elastase , cathepsin G , lactoferrin , lysozyme and beta glucuronidase . The third group designated atypical ANCA includes neutrophil nuclear fluorescence and some unusual cytoplasmic patterns , and while a few of the target antigens are shared with panca , the others have not been identified . Sera that produce a panca or atypical ANCA pattern on alcohol fixed neutrophils result in cytoplasmic fluorescence when formalin acetone fixation is used . panca or atypical ANCA occur in about 2 / 3 of all individuals with ulcerative colitis or primary sclerosing cholangitis , …

Significance of the determination of antineutrophil cytoplasmic antibodies ( ANCA ) in ulcerative colitis and crohn s disease We have … (1998 Jul)
significance of the determination of antineutrophil cytoplasmic antibodies ( ANCA ) in ulcerative colitis and crohn s disease We have studied prospectively 126 consecutive patients recruited with a known diagnosis of ulcerative colitis ( UC ; n 78 ) and crohn s disease ( CD ; n 48 ) for anti neutrophil cytoplasmatic antibodies ( ANCA ) by indirect immunofluorescence ( IFI ) . forty six percent of UC and 18 of CD patients were found positive . The sensitivity and specificity for UC diagnosis were 0 . 46 and 0 . 81 , respectively . We evaluated the pattern of IFI exhibited ( perinuclear : panca and cytoplasmatic : canca ) . canca was found in 77 of CD and in only 30 of UC patients ( p 0 . 01 ) . Sera from all CD patients were positive at a 1 : 20 dilution ( and not at higher dilution ) and it occurred in only in 14 UC patients ( 30 ) . positive sera were also tested to characterize the antigen specificity by enzyme linked immunosorbent assay ( elisa ) but the antigenic nature of ANCA could not be identified in most cases . No differences were found between ANCA positive and ANCA negative patients regarding colonic extension ( UC ) or colonic involvement ( CD ) , activity and colectomy . We conclude that ANCA may be a helpful diagnostic test in UC patients but it not seems to be important as a marker …

Sulfasalazine pulmonary toxicity in ulcerative colitis mimicking clinical features of wegener s granulomatosis. (1996 Sep)
sulfasalazine pulmonary toxicity in ulcerative colitis mimicking clinical features of wegener s granulomatosis . The centrally accentuated antineutrophil cytoplasmic antibody test ( c ANCA ) is widely regarded as a sensitive and specific marker for wegener s granulomatosis ( WG ) . there are increasing reports , however , of false positive c ancas , usually in the setting of other vasculidities . We report a case of a 27 year old man with ulcerative colitis who developed pulmonary symptoms , peripheral nodular lung infiltrates , and an elevated c ANCA suggesting WG . chest CT and open lung biopsy specimens were consistent with WG . The symptoms and pulmonary infiltrates resolved after discontinuation of sulfasalazine therapy . The c ANCA remained elevated due to the occurrence of false positive values in ulcerative colitis . We conclude sulfasalazine toxicity can mimic clinical aspects of WG and that c ANCA testing should be interpreted with caution in patients with ulcerative colitis .

Anti lactoferrin autoantibodies : relation between epitopes and iron binding domain. (1996 Dec)
Anti lactoferrin autoantibodies : relation between epitopes and iron binding domain . Anti neutrophil cytoplasm antibodies ( ANCA ) have been found in the sera of patients presenting systemic necrotizing microscopic vasculitis , i . e . wegener s granulomatosis and microscopic polyangiitis . lactoferrin ( LF ) is one of the antigens rarely recognized by ANCA , and anti LF autoantibodies are found in several autoimmune conditions , including rheumatoid vasculitis , rheumatoid arthritis , systemic lupus erythematosus , ulcerative colitis , primary sclerosing cholangitis and crohn s disease . We analysed the epitopes recognized by human anti LF antibodies to test whether the heterogeneity of clinical presentation might be due to a different epitope recognition profile . several monoclonal antibodies were raised and used in competition studies with six human sera . Four distinct epitopes were identified on LF , and LF binding of only one of six sera was inhibited by one of the monoclonals . Thus , anti LF autoreactivity appears to be polyclonal and not restricted to an immunodominant epitope . specific epitope profiles cannot be determined in these autoimmune conditions . We hypothesized that the interaction of anti LF antibodies with the LF iron binding domain might contribute to pathogenesis by inhibiting iron chelation after neutrophil activation , thereby providing increased iron availability for endothelial cell damage . The relation of anti LF mouse monoclonals or polyclonal human or rabbit antibodies to the LF iron binding domain was studied in competition assays between 59Fe …

Prevalence and significance of perinuclear anti neutrophil antibodies ( panca ) in romanian patients with crohn s disease and ulcerative … (2006 Jan)
prevalence and significance of perinuclear anti neutrophil antibodies ( panca ) in romanian patients with crohn s disease and ulcerative colitis . introduction : antineutrophil cytoplasmic antibodies ( ANCA ) are known as a serologic marker of immune disturbances in IBD . The most specific are perinuclear ANCA ( panca ) . The aim of this study was to investigate their significance for the diagnosis of inflammatory bowel disease ( IBD ) in romania . material AND methods : A prospective longitudinal study , comprising all patients admitted to our center in 2000 with ulcerative colitis UC group ( 33 patients ) and with crohn s disease CD group ( 40 patients ) . The control group ( C ) included 22 healthy individuals , with similar age and sex distribution . ANCA was tested in serum by indirect immunofluorescence at leuven university , belgium . results : ANCA prevalence in UC group was 12 / 33 ( 36 . 4 ) , in CD group was 6 / 40 ( 15 ) , while in the C group all sera tested negative ( p 0 . 004 ) . All ANCA antibodies in patients with IBD were perinuclear type . In the UC group , the prevalence of panca was higher in females compared to males ( 52 . 9 versus 16 . 7 , p 0 . 04 ) . The phenotype panca did not correlate with disease extension , severity , the evolutive form or complications . …

Antineutrophil cytoplasmic antibodies in children. (1999 Mar)
antineutrophil cytoplasmic antibodies in children . To define the diagnostic meaning of antineutrophil cytoplasmic antibodies ( ANCA ) positivity in children , we analysed 1485 consecutive sera sent for routine immunological investigation to our department from january to august 1996 . using this large screening , we identified the most typical clinical disorders associated with ANCA in childhood . Out of 1485 indirect immunofluorescence ( IIF ) tests for ANCA , 143 were ANCA positive , 70 had a cytoplasmic IIF pattern ( c ANCA ) , and 73 a perinuclear IIF pattern ( p ANCA ) . The ANCA associated diseases in childhood were cystic fibrosis ( CF ) ( 31 c ANCA , 7 p ANCA positive out of 71 CF children investigated ) , juvenile chronic arthritis ( JCA ) ( 21 p ANCA positive out of 78 ) , auto immune hepatitis ( AIH ) ( 4 c ANCA and 12 p ANCA positive out of 19 ) , and ulcerative colitis ( UC ) ( 2 c ANCA , 5 p ANCA positive out of 15 ) . In cases of c ANCA positivity we determined the antigenic specificity of ANCA for proteinase 3 and / or bactericidal / permeability increasing protein . borderline anti proteinase 3 levels were found in CF , and in high levels in one boy with wegener granulomatosis . bactericidal / permeability increasing protein was characteristic target antigen in children with CF . p ANCA positive children were further tested …

Antibodies to neutrophil cytoplasm in italian patients with ulcerative colitis : sensitivity , specificity and recognition of putative antigens. (1994 Mar)
antibodies to neutrophil cytoplasm in italian patients with ulcerative colitis : sensitivity , specificity and recognition of putative antigens . We studied the prevalence of perinuclear antineutrophil cytoplasmic antibody ( p ANCA ) , as detected by immunofluorescence , in 290 italian subjects . One hundred and two were affected by ulcerative colitis , 48 by crohn s disease , 40 by gluten sensitive enteropathy and 100 were normal subjects . The prevalence of p ANCA was significantly higher in ulcerative colitis patients ( 45 . 1 ) as compared to crohn s disease patients ( 4 . 8 ) , gluten sensitive enteropathy ( 0 ) and normal subjects ( 1 ; p 0 . 0001 ulcerative colitis vs . all other groups ) . In this setting , the overall specificity of the test was 98 . 1 with a sensitivity of 45 . 1 . The specificity slightly decreased to 95 . 1 when ulcerative colitis patients were compared to patients with crohn s colitis . In our series , p ANCA appeared to be more prevalent in ulcerative colitis patients with more aggressive disease . elisa experiments performed in order to identify the putative antigen ( s ) recognized by p ANCA positive sera showed that 8 of 12 sera positive at immunofluorescence reacted with at least one of the neutrophil preparations tested . The reactivities were directed towards various neutrophil preparations . preabsorption with the specific antigen recognized by elisa significantly inhibited the p ANCA …

Role of antineutrophil cytoplasmic antibodies in an ethnically distinct population : korean patients with ulcerative colitis. (1995 Dec)
Role of antineutrophil cytoplasmic antibodies in an ethnically distinct population : korean patients with ulcerative colitis . objectives : studies have suggested that antineutrophil cytoplasmic antibodies ( ANCA ) , known as a useful diagnostic marker in patients with ulcerative colitis ( UC ) , may have a genetic basis , particularly in association with HLA class II genes . because most studies examining the role of ANCA in UC have been performed in ethnically undefined populations , we have analyzed ANCA status in an ethnically distinct group of patients with UC . methods : serum samples from 24 korean patients with a known diagnosis of UC and 58 healthy koreans were examined for the presence of ANCA , using a fixed neutrophil enzyme linked immunosorbent assay . ANCA binding patterns were examined by indirect immunofluorescence . results : The incidence of ANCA in 83 . 3 of korean patients with UC was significantly higher than in controls ( p 0 . 0001 ) . The mean binding level at a 1 : 100 dilution and the titer of ANCA were significantly higher in patients with UC than in controls . among UC patients with ANCA , there was also a high incidence of perinuclear binding pattern . In contrast , there was no relationship between ANCA and age of patients , duration , activity , or extent of disease . conclusions : High sensitivity and specificity of ANCA in an ethnically distinct group of patients with UC show that …

ANCA against bactericidal / permeability increasing protein , azurocidin , calprotectin and defensins in rheumatic and infectious diseases : prevalence … (2004 Jan)
ANCA against bactericidal / permeability increasing protein , azurocidin , calprotectin and defensins in rheumatic and infectious diseases : prevalence and clinical associations . objective : To determine the prevalence and clinical associations of ANCA against the antibiotic proteins and peptides : bactericidal / permeability increasing protein ( BPI ) , azurocidin ( AZ ) , calprotectin ( CP ) and beta defensin 1 and 2 ( DF ) . methods : patients with ANCA associated vasculitides ( n 99 ) , other vasculitides and rheumatic connective tissue diseases ( n 303 ) , HIV infection ( n 66 ) , other infectious diseases ( n 134 ) crohn s disease ( n 12 ) and ulcerative colitis ( n 12 ) were tested for BPI , AZ , CP , DF , PR3 , and MPO ANCA in indirect immunofluorescence technique ( IFT ) and elisa . results : In ANCA associated vasculitides BPI ANCA were detected in 6 of patients . In HIV infection , BPI was the main target antigen of ANCA IFT positive sera ( 74 ) . BPI ANCA was associated with higher inflammatory activity . In crohn s disease and ulcerative colitis BPI ANCA was prominent ( 34 of patients ) . AZ ANCA were found in 5 of patients . No ANCA were detected against defensin and calprotectin . conclusion : BPI ANCA is the main autoantibody in HIV and is associated with higher inflammatory activity . In inflammatory bowel diseases BPI ANCA …

Long term observation of the perinuclear anti neutrophil cytoplasmic antibody status in ulcerative colitis patients. (1998 May)
Long term observation of the perinuclear anti neutrophil cytoplasmic antibody status in ulcerative colitis patients . background : perinuclear anti neutrophil cytoplasmic antibodies ( p ANCA ) have been regarded as a possible immunogenetic marker of ulcerative colitis . If this were true , the p ANCA status of a given patient should be constant over time ; however , little information is available on this issue . methods : One hundred and forty five sera collected from 40 ulcerative colitis patients during a mean follow up period of 50 . 6 months were tested for p ANCA reactivity by indirect immunofluorescence . results : At base line 24 patients ( 60 ) were p ANCA positive , with no relationship to gender distribution , age at diagnosis , disease activity , or extension . during follow up , changes in p ANCA status occurred in 10 patients ( 25 ) . P ANCA positivity during follow up was associated with more aggressive forms of disease , whereas p ANCA negativity was associated with stable remission . conclusions : changes in the p ANCA status over time occur in some ulcerative colitis patients . P ANCA behaviour is associated with different clinical patterns of disease .

Antineutrophil cytoplasmic antibodies as marker and follow up parameter of vasculitis and glomerulonephritis antineutrophil cytoplasmatic antibodies ( ANCA ) represent … (1994 Dec)
antineutrophil cytoplasmic antibodies as marker and follow up parameter of vasculitis and glomerulonephritis antineutrophil cytoplasmatic antibodies ( ANCA ) represent a heterogeneous group of autoantibodies targeting cytoplasmatic proteins in neutrophils and monocytes . They can be subdivided into c ANCA which react with proteinase 3 ( PR3 ) and p ANCA which recognize myeloperoxidase ( MPO ) . PR3 and MPO are found in the azurophilic granules of neutrophils . activated neutrophils express these proteins on the cell surface ; therefore , they can interact with ANCA . This interaction induces neutrophil degranulation with release of lytic enzymes and free oxygen radicals . The vasculitic process is thus initiated . The c ANCA can be detected mainly in wegener s granulomatosis , and the titers can be used to monitor disease activity . The p ANCA are mainly found in pauci immune , rapidly progressive glomerulonephritides ( RPGN ) . recently , a host of additional inflammatory diseases have been associated with ANCA , for example ulcerative colitis and crohn s disease . The pathogenic role of ANCA in these inflammatory bowel diseases is largely unknown .