scholarly journals Regeneration of the digestive tract of an anterior-eviscerating sea cucumber, Eupentacta quinquesemita, and the involvement of mesenchymal–epithelial transition in digestive tube formation

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Akari Okada ◽  
Mariko Kondo
Keyword(s):  
Digestive Tract ◽  
Sea Cucumber ◽  
Tube Formation ◽  
Digestive Tube ◽  
Mesenchymal Epithelial Transition

scholarly journals Morphological Features Of The Immune Structures Of The Thin Intestine Of Laboratory Animals With Various Characters Of Nutrition

2020 ◽  
Vol 2 (09) ◽  
pp. 72-74
Author(s):  
Khusanov Erkin ◽  
Ortikbaeva Nilufar ◽  
Korzhavov Sherali
Keyword(s):  
Small Intestine ◽  
Digestive Tract ◽  
Structural Organization ◽  
Morphological Changes ◽  
Comparative Morphology ◽  
Morphological Features ◽  
The Body ◽  
Laboratory Animals ◽  
Chemical Processing ◽  
Digestive Tube

The nutritional nature of mammals, which has developed during a long evolution, leads to adaptive - morphological changes in their digestive tract and its immune structures, although the general laws of their structural organization are identical. The literature has data on the study of the immune structures of the small intestine under normal conditions and under the influence of certain factors. In the structure of immune structures there are numerous parallelisms, however, in each class of vertebrates, complication of this organization is achieved independently. The small intestine is an important section of the digestive tube, where the final chemical processing of the chyme and the absorption of nutrients into the body take place. However, the comparative morphology of the immune structures of the small intestine in mammals with different nutrition patterns remains poorly understood.

Distribution and seasonal activity variation of proteases in digestive tract of sea cucumber Stichopus japonicus

2006 ◽  
Vol 72 (5) ◽  
pp. 1130-1132 ◽  
Author(s):  
Xueyan FU ◽  
Changhu XUE ◽  
Benchun MIAO ◽  
Zhaojie LI ◽  
Xin GAO ◽  
...  
Keyword(s):  
Digestive Tract ◽  
Sea Cucumber ◽  
Seasonal Activity ◽  
Stichopus Japonicus ◽  
Activity Variation

Characterization of proteases from the digestive tract of sea cucumber (Stichopus japonicus): High alkaline protease activity

Aquaculture ◽  
2005 ◽  
Vol 246 (1-4) ◽  
pp. 321-329 ◽  
Author(s):  
Xue-yan Fu ◽  
Chang-hu Xue ◽  
Ben-chun Miao ◽  
Zhao-jie Li ◽  
Xin Gao ◽  
...  
Keyword(s):  
Digestive Tract ◽  
Alkaline Protease ◽  
Protease Activity ◽  
Sea Cucumber ◽  
Stichopus Japonicus

Ontogeny of the digestive tract of Brycon amazonicus (Teleostei, Bryconidae) under culture conditions: from hatching to juvenile stage

Zygote ◽  
2020 ◽  
Vol 28 (3) ◽  
pp. 208-216
Author(s):  
Erika Neumann ◽  
Maria do Carmo Faria Paes ◽  
José Mário Ribeiro Mendes ◽  
Francisco Manoel de Souza Braga ◽  
Laura Satiko Okada Nakaghi
Keyword(s):  
Digestive Tract ◽  
Single Layer ◽  
Culture Conditions ◽  
Proximal Region ◽  
Basic Knowledge ◽  
Morphological Development ◽  
Straight Tube ◽  
Gastric Glands ◽  
Digestive Tube ◽  
Nutritional Studies

SummaryIn the present study, the morphological development of the Brycon amazonicus digestive tract is described to provide basic knowledge for nutritional studies and, therefore, increase the survival of this species during larviculture. Samples were collected from hatching up to 25 days of age, measured, processed and observed under a stereomicroscope and light microscopy. Newly hatched larvae presented their digestive tract as a straight tube, dorsal to the yolk sac, lined with a single layer of undifferentiated cells. At 24 h post-hatching (hPH), the buccopharyngeal cavity was open, but the posterior region of the digestive tube remained closed. At 25 hPH, the digestive tube was completely open and could be divided into buccopharyngeal cavity, oesophagus and intestine. At 35 hPH, the intestine presented a dilatation in the proximal region, which had the function of storing food. Differentiation of the stomach started at 83 hPH, and mucous cells were observed in the epithelium. These cells are important in the production of mucus, whose function is to protect the organ against acidity, although the gastric glands began developing only from 171 hPH, when three stomach regions were observed: cardiac, fundic and pyloric. The gastric glands were observed in the cardiac region, indicating that this organ already had digestive functionality. From 243 hPH, the absorption and assimilation of nutrients were already possible but, only from 412 hPH, the digestive tract was completely developed and functional.

Study of a highly alkaline protease extracted from digestive tract of sea cucumber (Stichopus japonicus)

2005 ◽  
Vol 38 (3) ◽  
pp. 323-329 ◽  
Author(s):  
Xue-yan Fu ◽  
Chang-hu Xue ◽  
Ben-chun Miao ◽  
Zhao-jie Li ◽  
Wen-ge Yang ◽  
...  
Keyword(s):  
Digestive Tract ◽  
Alkaline Protease ◽  
Sea Cucumber ◽  
Stichopus Japonicus

scholarly journals Morphological characteristics of changes in the squamous epithelium of the upper part of the digestive tract in model organisms in the settings of provoked carcinogenesis

2021 ◽  
Vol 62 (4) ◽  
pp. 35-42
Author(s):  
V. Shestakova ◽  
L. Nigmatullina ◽  
I. Atadzhanov ◽  
S. Donskov ◽  
Yu. Kozlovskaya ◽  
...  
Keyword(s):  
Digestive Tract ◽  
Squamous Epithelium ◽  
Model Organisms ◽  
Control Group ◽  
Malignant Neoplasms ◽  
Control Groups ◽  
Carcinogenic Activity ◽  
Digestive Tube ◽  
White Rats ◽  
Experimental Group

Relevance: Noticeable spreading of malignant neoplasms of upper section of digestive system and the worsening of these patients’ quality of life in case of late diagnostics stimulate the development of protocols for early detection of precancerous changes. The purpose of the study was to investigate the morphological characteristics of changes in the squamous epithelium of the upper part of the digestive tube in model organisms under provoked carcinogenesis when exposed to substances with proven carcinogenic activity. Methods: 40 female nonlinear white rats obtained from the Orekhovo-Zuevsky urban settlement veterinary station were used as model organisms. The rats were divided into 4 equal groups. The first control group was not exposed to any specific influences. In groups 2-4, the rats underwent sedation and mechanical scarification microtraumatization of the oral mucosa. Then, they were applied twice a week by 0.9% NaCl solution (control group 2), 1% aqueous solution of dimethyl sulfoxide (DMSO, Akrikhin, Russia) (control group 3), or 1% aqueous solution of DMSO containing 0.1 mg/ml 4-nitroquinoline-N-oxide (4- NQO, Acros Organics, USA) (experimental group 4). Results: The cytological picture associated with chronic trauma to the mucous membrane of the upper digestive tract was characterized by nonspecific reactions: inflammation, hyper- and parakeratosis, and atrophic changes. There were no statistically significant differences in the frequency of such changes between the experimental and control groups. Specific changes in squamous epithelium towards a precancerous state in the experimental group with chronic exposure to a substance with carcinogenic activity occurred significantly more often than in the control groups (p <0.05), as proven by the results of comparative histological verification. Conclusion: Cytological study can be offered for clinical study as a screening tool for precancerous oropharynx and upper esophagus conditions

scholarly journals Feeding selectivity of Holothuria atra in different microhabitat in Panjang Island, Jepara (Java, Indonesia)

2020 ◽  
Vol 21 (5) ◽  
Author(s):  
Retno Hartati ◽  
AMBARIYANTO AMBARIYANTO ◽  
WIDIANINGSIH WIDIANINGSIH ◽  
MUHAMMAD ZAINURI
Keyword(s):  
Organic Matter ◽  
Digestive Tract ◽  
Chlorophyll A ◽  
Sea Cucumber ◽  
Alimentary Canal ◽  
Niche Separation ◽  
Depth Range ◽  
Feeding Selectivity ◽  
Microalgal Biomass ◽  
Holothuria Atra

Abstract. Hartati R, Zainuri M, Ambariyanto A, Widianingsih W. 2020. Feeding selectivity of Holothuria atra in different microhabitat in Panjang Island, Jepara (Java, Indonesia). Biodiversitas 21: 2233-2239. Particle selectivity by deposit feeder sea cucumber Holothuria atra was an important concept in its feeding ecology. This species utilized the organic matter that coated sediment and detrital particles as food. Thus, particle size, organic matter, and microalgal biomass had been proposed as variables food resources along which niche separation could occur in optimal foraging strategy. This study was conducted in five microhabitats of different coverage of seagrass bed (P1-P4) up to the rubble area (P5) over a tidally variable depth range of 0,5-5m in Panjang island, Jepara. Twenty samples of sea cucumber H. atra were taken from defined microhabitat, along with samples of sediment underneath the sea cucumber. Granulometry of the particles ingested by sea cucumbers, total organic matter, and microphytobenthic biomass (as chlorophyll-a) found throughout their digestive tract (alimentary canal) and in the sediments was analyzed. Comparison of the contents and the rates of organic matter assimilation of the digestive tract with those of the microhabitat sediment were carried out. The results showed that H. atra fed on sediment underneath their body and it was revealed that there were strong (ƿ=0.833-0.876) to very strong (ƿ=0.945) positive relationship between grain size in the sediment and in their alimentary canal which showed their feeding selectivity of the sediment. H. atra also found to have efficiency in feeding by taking advantage of the high TOM content and high abundance of microphytobenthic organisms (presented as chlorophyll-a) in their natural microhabitats.

scholarly journals PARCELAR GASTRIC RESECTION IN ASSOCIATION WITH BOWEL RESECTIONS AS PART OF DEBULKING SURGERY FOR ADVANCED STAGE OVARIAN CANCER – A CASE REPORT

2021 ◽  
Vol 68 (2) ◽  
pp. 306-309
Author(s):  
Nicolae Bacalbasa ◽  
◽  
Irina Balescu ◽  
Adnan Al Aloul ◽  
◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Digestive Tract ◽  
Gastric Resection ◽  
Ileorectal Anastomosis ◽  
Survival Rates ◽  
Poor Survival ◽  
Digestive Tube ◽  
Tract Involvement ◽  
Multiple Levels ◽  
Terminal Ileostomy

Ovarian cancer represents one of the most aggressive gynecological malignancies affecting women worldwide, associated with significant rates of cancer related death within the first years after the initial diagnostic. The poor survival rates are usually explained by the presence of disseminated lesions even from the beginning. In such situations, the digestive tube is one of the most commonly involved territory, therefore necessitating extended resections in order to achieve complete cytoreduction. The aim of this paper is to report the case of a 53 year old patient who was diagnosed with peritoneal carcinomatosis from ovarian cancer, presenting multiple levels of digestive tract involvement due to the presence of disseminated tumoral masses. Therefore the patients was submitted to multiple digestive resections represented by parcelar gastrectomy, segmental ileal resection and subtotal colectomy. In order to minimize the risks of developing severe postoperative complications – due to the relatively high number of anastomoses – the continuity of the digestive tract was established by a terminal ileostomy, considering that creation of a ileorectal anastomosis would be too dangerous in the context of multiple digestive resections. The postoperative evolution was simple, the patient being further submitted to adjuvant treatment.

Sign in / Sign up

Export Citation Format

Share Document