Periodic acid-Schiff Staining Techniques Research Articles

Immunohistochemical Pattern and Diagnostic Applications of AlphaMethyl Coa Racemase and Anti-Carcinoembryonic Antigen on Prostate Cancer

Prostate cancer is one of the most common types of malignant tumors, and its incidence rate has increased worldwide. It is the most prevalent cancer among men, most affecting older men, particularly those above 60 years of age. Notably, early detection, diagnosis, and treatment can result in improved patient outcomes, such as an improved 5-year survival rate. This study aims to evaluate the immunohistochemical pattern and diagnostic applications of alpha-methyl Co-A, racemase, and anti-carcinoembryonic antigen on prostate tumors. A total of one hundred (100) tissue blocks used in this study were collected from the archives of the histopathology laboratory at AEFUTHA and evaluated using Haematoxylin and Eosin Periodic Acid Schiff staining techniques and immunohistochemical stains. The hospital data show that a total of 132 prostate tumor samples were submitted for histological analysis from 2019 to 2021. Histologic sections of the prostatic tissues showed well-formed prostatic glands lined by two layers of low cuboidal cells to columnar epithelium, the presence of glandular secretions or corpora amylacae, and inflammatory infiltrates that were mostly made up of mononuclear cells. Also seen were poor attempts at glandular formation; glands were lined by a single layer of epithelial cells, of which the linning epithelial cells were pleomorphic with hyperchromatic nuclei and prominent nucleoli. Furthermore, evidence of tumour infiltration and spread, which included perineural invasion and stromal desmoplastic. The immunohistochemical staining reactions of AMACR and CEA in the tissue sections show various intensities of expression. The intensity of expression was scored in four levels: negative (0/3), weak expression (1/3), moderate expression (2/3), and strong expression (3/3). This present study showed that these markers are useful in the diagnosis of prostate cancer.

STRUKTUR HISTOLOGI DAN JUMLAH SEL GOBLET PADA SEDIAAN HISTOPATOLOGIS RADANG USUS BESAR DENGAN PEWARNAAN HEMATOXYLIN-EOSIN (HE) DAN PERIODIC ACID-SCHIFF (PAS)

Abstract: Goblet cells and the mucus they produce serve as an important barrier to prevent pathogens invading the mucosal tissue that can cause inflammation. In the inflamed tissue, will have changed in the structure and number of goblet cells. Hematoxylin-Eosin (HE) staining is a standard stain used to examine the histological structure of tissues while Periodic Acid-Schiff (PAS) is a histological stain other than HE that can stain carbohydrates and carbohydrate-rich macromolecules. The purpose of this study was to observe differences in the structure and number of goblet cells in the inflammatory colon using HE and PAS staining. This study used 27 samples of paraffin block of rat colon tissue which were divided into three groups, namely the normal group, acute intestinal inflammation, and chronic intestinal inflammation. The tissue samples were then stained with HE and PAS staining techniques. In this study, statistical analysis of an independent t-test and Mann-Whitney test was used to observe differences in the number of goblet cells in inflammatory colon tissue using HE and PAS staining in each group. This study concludes that the number of goblet cells that can be observed in inflammatory colon tissue using HE and PAS staining is significantly different with a p-value <0.05 where the average number of goblet cells using PAS staining is higher than using HE.Keywords: goblet cells, inflammatory colon, Hematoxylin-Eosin, Periodic Acid-Schiff.

The Use of One Normal Hydrochloric Acid as a Background Cleaner for Periodic Acid–Schiff Staining Technique

Abstract Objectives Sulfurous rinsing was considered nonessential as contained in the published periodic acid–Schiff technique because it did not clear the background better than tap water washing. The objective of this work is to elucidate the use of 1N HCl as a better background cleaner in the periodic acid–Schiff staining technique. Methods This is an experimental research. Normal samples of antrium, kidney, spleen, muscle, liver, and appendix, as well as histopathologically diagnosed samples of glycogen storage disease of the liver, alpha-1-antitrypsin deficient liver, aspergillosis nasal cavity sample, and glomerulosclerosis samples were obtained from the pathological archive. These samples were stained with a newly purchased commercially prepared Schiff reagent and overstained commercially prepared Schiff’s solution causing nonspecific background staining and laboratory-prepared Schiff reagent. Oxidation was done with 1% periodic acid for 5 minutes, washed for 5 minutes with distilled water, and stained for 10 minutes in Schiff’s reagent, but 20-minute staining was observed for the overstained Schiff reagent, oxidized in running tap water for 15 minutes. It was then rinsed in 1N HCl for 20 seconds, washed in tap water for 2 minutes, and counterstained with hematoxylin for 2 minutes. The same procedure was done for another set of slides as standards without 1N HCl rinsing done. The slides were examined under the microscope and compared for specificity. Results Slides rinsed in 1N HCl showed a clear differentiation of strong, weak, and non-PAS-positive substances. The overall effect of these staining characteristics was more pronounced in the use of laboratory-prepared Schiff. Conclusion The use of 1N HCl as a differentiator made the PAS technique more specific in its staining characteristics, especially with the use of laboratory-prepared Schiff’s reagent, which is commonly used in developing countries owing to a high cost of commercially prepared Schiff’s solution.

Anatomical and cytohistological study of the pituitary gland in adult turkey.

In order to conduct this study, eight adult turkey heads were obtained. Pituitary glands were harvested following cranial bones removal and examined morphologically and anatomically as well as topographically. Then, tissue sections were prepared and stained using Hematoxylin and Eosin, Alcian blue, orange G and periodic acid-Schiff staining techniques. The results showed that turkey pituitary gland as a pea-sized structure is located in the ventral part of the cerebrum and composed of adenohypophysis and neurohypophysis parts. Moreover, histological analyses revealed that sinusoids are well-developed at the distal part of the adenohypophysis and irregular masses of endocrine cells exist among them. Distributions of basophilic cells in the distal part of adenohypophysis were significantly higher than those of other endocrine cells, while the acidophilic cells had the lowest distribution. Lower and higher numbers of chromophobe cells were also found compared to those of basophilic and acidophilic cells, respectively. These findings were mostly similar to the other birds’ pituitary gland anatomical and histological features, but there were also differences in cellular elements distributions along with infundibular cavity topography.

Disseminated Histoplasmosis in a 13-year-old girl: A case report

Disseminated histoplasmosis is a rare fungal infection and most documented cases are in immune-compromised individuals such as those with acquired immuno-deficiency syndrome. To describe a case of disseminated histoplasmosis in an adolescent girl. We report a case of disseminated histoplasmosis in a 13-year-old adolescent girl. She was admitted for 16 days because of neck masses of 3 years duration, generalized body swelling of 3 months and reduction in urinary output of 2 months. She tested negative for human immunodeficiency virus antibodies. An autopsy was performed because a definitive diagnosis could not be made while the patient was still alive. The autopsy revealed central caseating areas in the lymph nodes and membranoproliferative glomerulonephritis. The periodic acid-Schiff staining technique for tissues showed viable yeast cells suggestive of histoplasmosis. Zeihl-Neelsen's staining for mycobacteria tuberculosis was negative. Undiagnosed case of disseminated histoplasmosis while the patient was alive is being reported in a 13-year-old girl. Disseminated histoplasmosis should be considered as a differential diagnosis of childhood chronic infections and malignancies as in Nigeria.

An anatomical and histochemical examination of the pituitary gland of carp (Cyprinus carpio)

The present study was carried out for the purpose of studying the anatomical and the histochemical structure of the pituitary gland of the common carp, Cyprinus carpio. Anatomically, the shape of the gland has been observed to be round-oval, looking like an acorn. The pituitary gland consists of the adenohypophysis and neurohypophysis parts. Microscopically, the adenohypophysis consists of anterior (pars distalis) and posterior (pars intermedia) parts. The second lobe of the gland, called the neurohypophysis, is found in the core of the gland. Histologically, acidophilic prolactin cells stained red or orange and were dispersed in the rostral pars distalis (pro-adenohypophysis) of the adenohypophysis. Basophilic thyrotropin cells stained blue and were found in a small number in the same region. Adrenocorticotropin cells showed a chromophobic character; therefore, they did not get stained by the periodic acid-Schiff staining techniques. Gonadotropin cells were observed in the proximal pars distalis (meso-adenohypophysis) of the adenohypophysis. In the examined specimens, the faintly stained, elongated or pyramidal cells in the pars intermedia of the adenohypophysis were covering the neurohypophysis region. The neurohypophysial lobe was composed of unmyelinated nerve fibers and the pituicyte cells were located among the nerve fibers. Herring bodies were seen scattered in the neurohypophysis.

Characterization of the swimming muscle of the anchovy Engraulis anchoita (Hubbs and Martini 1935).

The lateral muscle characteristics of individual female anchovies (Engraulis anchoita) were studied by histochemical and ultrastructural techniques. Red, pink and white fibres were discerned on the basis of the activity of the metabolic enzymes succinic dehydrogenase, phosphorylase and myofibrilar ATPase, and the usage of Sudan and periodic-acid Schiff staining techniques. Red fibres were located at the surface, white fibres deep inside and pink fibres in between. The red fibres appeared flattened or ribbon-shaped in transverse section and they were located in rows separated by myosepta of connective tissue. The red and pink fibres were multi-innervated whereas the white fibres were terminally innervated. The relative proportion of the red muscle increased toward the caudal region, the white muscle diminished toward that region, whereas the proportion of pink muscle did not vary according to region, being scarce throughout. The distribution of capillaries was also investigated, and as a result, the vascular supply proved to be scarce in both white and pink muscle.

Purification and characterisation of a carboxylesterase from the latex ofSynadenium grantii Hook, ‘f’

The latex ofSynadenium grantii was found to contain esterolytic activity. Polyacrylamide gel electrophoretic study coupled with substrate and inhibitor specificity studies revealed the presence of multiple forms of carboxylesterases and cholinesterases in the latex. One of the carboxylesterases of the latex was purified by acetone fractionation, carboxymethyl-Sephadex chromatography and Sepharose-6B gel filtration. The homogeneity of the enzyme was established by polyacrylamide gel electrophoresis, isoelectric focussing and sodium dodecyl sulphate-polyacrylamide gel electrophoresis. The enzyme consists of a single polypeptide chain with a molecular weight of 14,000. The amino acid analysis of the purified enzyme revealed that it contained a greater number of neutral and acidic, compared to basic amino acid residues. The isoelectric pH of the enzyme was found to be 4.0. The enzyme was a glycoprotein as revealed by periodic acid Schiff-staining technique. Studies with different organophosphate and carbamate inhibitors showed that this enzyme was sensitive to organophosphates. The product inhibition studies with this enzyme showed linear competitive inhibition with acetate and linear non-competitive inhibition with 1-naphthol.

Modified technique for periodic acid-Schiff staining of glycoproteins on agarose-film electrophoretograms.

We have modified the periodic acid-Schiff staining technique for glycoproteins for use with thin agarose-film electrophoresis membranes. With this procedure, carbohydrate-rich proteins can be detected with negligible background staining and insignificant staining of nonglycoproteins such as albumin and nonglycosylated Bence Jones proteins (free light chains). On the other hand, carbohydrate-rich M components of immunoglobulins M and A in serum and in cerebrospinal fluid from patients with plasma cell dyscrasia are readily detected. The technique is two- to threefold more sensitive than Ponceau S. Glycoproteins in serum and body fluids can be determined as a routine analytical procedure.