Methods to predict progression of Barrett's Esophagus to high grade dysplasia esophageal adenocarcinoma
In some embodiments, a method for aiding prediction of the likelihood of progression from Barrett's esophagus to high grade dysplasia or esophageal adenocarcinoma in a subject, is disclosed. The method can include (a) providing an oesophagal sample from said subject (b) determining if said sample stains abnormally with Aspergillus oryzae lectin; (c) determining if there is a DNA content abnormality in said sample; and (d) determining if there is low grade dysplasia in said sample; wherein if (b) is abnormal and (c) is abnormal and low grade dysplasia is present, then an increased likelihood of progression is determined. The disclosed subject matter also relates to an apparatus, and to different uses of certain materials.
1. A method for determining likelihood of progression from Barrett's esophagus to high grade dysplasia or esophageal adenocarcinoma in a human subject with Barrett's esophagus using an assay device, which includes a biomarker panel, the method comprising:
(a) providing an oesophagal sample from said human subject, and using the sample for detection of fragments of biomarkers in the sample;
(b) staining said sample with biotinylated Aspergillus oryzae lectin (AOL) and determining whether the stained sample produces an abnormal stain based on determination of a staining score, the staining requires an assay that stains, the biotinylated Aspergillus oryzae lectin is Aspergillus oryzae lectin, which is labelled with biotin; and
(c) determining if a DNA copy number in said sample is abnormal using image cytometry DNA analysis, the DNA copy number diploid being normal, and the DNA copy number tetraploidy or aneuploidy being abnormal; and
(d) determining if there is low grade dysplasia in said sample,
wherein, in a first determination, if (b) is abnormal and (c) is abnormal and low grade dysplasia is present, then the likelihood of said progression is determined to be higher for said human subject compared to the likelihood of said progression for an equivalent subject, in a second determination, demonstrating all of the following: a normal stain in step (b); a normal DNA copy in step (c) and no low grade dysplasia, wherein:
step (d) includes histological examination of the sample, and scoring one of the presence and absence of low grade dysplasia using a Vienna scale,
the assay device includes the biomarker panel including a material, which binds to and has affinity for AOL, and
the determining whether the stained sample produces an abnormal stain based on determination of the staining score includes:
staining a plurality of components, the plurality of components includes apical membrane, pan membranous, epithelial mucous globules and epithelial cytoplasm;
determining a level of staining by the AOL, for each component, by:
(a) grading the intensity of the stain and the percentage of the area stained at said intensity, and
(b) producing, based on the level of the staining for each component, an H score; and
comparing for each component, of the plurality of components, to determine if the H score is abnormal, the comparing including:
the H score considered abnormal if highest score for apical membrane, epithelial mucous globules or epithelial cytoplasm was 4-12, or pan membranous was >0;
based on the comparing, dichotomizing each of the components of the staining score into one of normal and abnormal;
summing, the results of the dichotomizing, to provide an overall abnormal score for the components; and
comparing the overall abnormal score to a reference to determine if the stained sample is abnormal.
2. A method according to claim 1 , further comprising step (e) determining if staining for CA 19-9 produces an abnormal stain,
wherein if (b) is abnormal and (c) is abnormal and low grade dysplasia is present, and if (e) is abnormal then the likelihood of progression to esophageal adenocarcinoma is determined to be greater than if (e) is normal.
3. An assay, which includes a biomarker panel, for selecting a treatment regimen for a human subject with Barrett's esophagus, said assay comprising
(a) providing an oesophagal sample from said human subject, and using the sample for detection of fragments of biomarkers in the sample;
(b) staining said sample with biotinylated Aspergillus oryzae lectin (AOL) and determining whether the stained sample produces an abnormal stain based on determination of a staining score, wherein the staining requires an assay that stains, the biotinylated Aspergillus oryzae lectin is Aspergillus oryzae lectin, which is labelled with biotin;
(c) determining if a DNA copy number in said sample is abnormal using image cytometry DNA analysis, the DNA copy number diploid being normal, and the DNA copy number tetraploidy or aneuploidy being abnormal; and
(d) determining if there is low grade dysplasia in said sample, wherein:
if (b) is abnormal and (c) is abnormal and low grade dysplasia is present, then a treatment regimen including-surveillance is selected,
step (d) includes histological examination of the sample, and scoring one of the presence and absence of low grade dysplasia using a Vienna scale,
the assay device includes the biomarker panel including a material, which binds to and has affinity for AOL, and
the determining whether the stained sample produces an abnormal stain based on determination of the staining score includes:
staining a plurality of components, the plurality of components includes apical membrane, pan membranous, epithelial mucous globules and epithelial cytoplasm;
determining a level of staining by the AOL, for each component, by:
(a) grading the intensity of the stain and the percentage of the area stained at said intensity, and
(b) producing, based on the level of the staining for each component, an H score; and
comparing for each component, of the plurality of components, to determine if the H score is abnormal, the comparing including:
the H score considered abnormal if highest score for apical membrane, epithelial mucous globules or epithelial cytoplasm was 4-12, or pan membranous was >0;
based on the comparing, dichotomizing each of the components of the staining score into one of normal and abnormal;
summing, the results of the dichotomizing, to provide an overall abnormal score of for the components; and
comparing the overall abnormal score to a reference to determine if the stained sample is abnormal.
4. A method according to claim 1 , wherein said sample comprises formalin fixed paraffin embedded material.
5. A method according to claim 1 wherein step (c) comprises determining the DNA copy number by image cytometry DNA analysis and inferring from said determination whether said DNA copy number is abnormal.
6. A method for treating a human subject with Barrett's esophagus, which includes a biomarker panel, the method comprising:
(a) providing an oesophagal sample from said human subject, and using the sample for detection of fragments of biomarkers in the sample;
(b) determining if staining said sample with biotinylated Aspergillus oryzae lectin (AOL) produces an abnormal stain based on determination of a staining score, wherein the staining requires an assay that stains, the biotinylated Aspergillus oryzae lectin is Aspergillus oryzae lectin, which is labelled with biotin,
(c) determining if a DNA copy number in said sample is abnormal using image cytometry DNA analysis, the DNA copy number diploid being normal, and the DNA copy number tetraploidy and aneuploidy being abnormal; and
(d) determining if there is low grade dysplasia in said sample, wherein:
if (b) is abnormal and (c) is abnormal and low grade dysplasia is present, then treating said subject with increased surveillance for progression from Barrett's esophagus to high grade dysplasia or esophageal adenocarcinoma,
step (d) includes histological examination of the sample, and scoring one of the presence and absence of low grade dysplasia using a Vienna scale,
the assay device includes the biomarker panel including a material, which binds to and has affinity for AOL, and
the determining if staining said sample with biotinylated Aspergillus oryzae lectin (AOL) produces an abnormal stain based on determination of a staining score includes:
staining a plurality of components, the plurality of components includes apical membrane, pan membranous, epithelial mucous globules and epithelial cytoplasm;
determining a level of staining by the AOL, for each component, by:
(a) grading the intensity of the stain and the percentage of the area stained at said intensity, and
(b) producing, based on the level of the staining for each component, an H score; and
comparing for each component, of the plurality of components, to determine if the H score is abnormal, the comparing including:
the H score considered abnormal if highest score for apical membrane, epithelial mucous globules or epithelial cytoplasm was 4-12, or pan membranous was >0;
based on the comparing, dichotomizing each of the components of the staining score into one of normal and abnormal;
summing, the results of the dichotomizing, to provide an overall abnormal score for the components; and
comparing the overall abnormal score to a reference to determine if the stained sample is abnormal.
7. The method according to claim 1 , wherein the oesophagal sample is provided on a glass slide.
8. The method according to claim 3 , wherein the oesophagal sample is provided on a glass slide.
9. The method according to claim 6 , wherein the oesophagal sample is provided on a glass slide.
10. The method according to claim 1 , wherein the biomarker panel includes a polypeptide marker.