Background: The respiratory submucosal glands are a major source of secretions in the airway. Human submucosal laryngeal glands have been scarcely studied, with no works existing about their ultrastructure and histochemistry.
Methods: Samples of epiglottis, ventricle, false vocal folds and true vocal folds were fixed in 10% buffered formalin for histochemical study with conventional and carbohydrate lectin histochemistry. Other samples were fixed in 2.5% glutaraldehyde and conventionally processed for transmission electron microscopy.
Results: The human submucosal laryngeal glands are composed of serious tubules; mucous tubules; collector duct; and final portion of this duct. The serous cells showed sialosulphomucins and affinity for WGA and Con-A lectins. With a previous treatment with neuraminidase, they also labelled with PNA. The mucous cells contained sialosulphomucins and showed affinity for WGA and DBA lectins in the samples proceeding from blood group A, and for WGA, UEA-I and LTA with those from blood group O. Ultrastructurally, the serous cells presented a wide variety of granules, cells in which seromucous granules predominated. The mucous cells presented larger-sized granules which were very electron-lucent. The collector duct was composed of mitochondria-rich cells and basal cells. A cell which we have termed "intermediate" was identified in the transition zone between the mucous tubules and the collector duct, and in the final portion of the collector duct. It had morphological characteristics as if it were a transition between a goblet cell and collector duct cell. Some nerve endings with cholinergic and peptidergic vesicles were found among the myoepithelial cells.
Conclusions: These glands presented some histological differences from the bronchial glands, the mucous secretion was related to the blood group antigens, and the serous cells showed a wide variability in their secretory granules, many of them being of a seromucous type.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/ar.1092390411 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Validation of a real-time biliopancreatic endoscopic ultrasonography analytical device in China: a prospective, single-centre, randomised, controlled trial.
Lancet Digit Health
November 2023
Department of Gastroenterology, Hubei Provincial Clinical Research Center for Digestive Disease Minimally Invasive Incision, and Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan, China. Electronic address:
Background: Endoscopic ultrasonography (EUS) is a key procedure for the diagnosis of biliopancreatic diseases. However, the performance among EUS endoscopists varies greatly and leads to blind spots during the operation, which can impair the health outcomes of patients. We previously developed an artificial intelligence (AI) device that accurately identified EUS standard stations and significantly reduced the difficulty of ultrasonography image interpretation.
View Article and Find Full Text PDFApplication of triangular duct in solar-assisted air-heating system with surface roughness: a numerical investigation.
Environ Sci Pollut Res Int
November 2024
GLA University, Mathura, India.
The device called solar air heater (SAH) is used to collect and transfer solar-thermal energy to air that can further be used for space heating, drying, etc. The conventional air heater (solar-assisted) has poor performance, and with this work, an attempt has been made to improve its performance by providing surface roughness over the heated surface. The roughness employed over the surface has an elliptical cavity, and its distribution over the heated surface is defined with the three parameters (dimensionless): relative flow-wise distance (ranging from 6 to 14), relative cavity depth (ranging from 0.
View Article and Find Full Text PDFInguinal intranodal lymphangiography reveals a high incidence of suprainguinal lymphatic disease in patients with leg edema undergoing stenting for symptomatic chronic iliofemoral venous obstruction.
J Vasc Surg Venous Lymphat Disord
November 2023
The RANE Center for Venous & Lymphatic Diseases, St Dominic Hospital, Jackson, MS.
Objective: Recent studies have emphasized the important role lymphatics play in the drainage of interstitial fluid and edema prevention. Although the infrainguinal lymphatics have been studied in some depth, with patterns of pathology identified, such data above the groin are sparse, especially for patients with phlebolymphedema. The present study attempts to evaluate the status of lymphatic flow above the inguinal ligament in patients presenting with edema and undergoing stenting for symptomatic chronic iliofemoral venous obstruction (CIVO).
View Article and Find Full Text PDFThermohydraulic performance augmentation in a solar air heater using a perforated circular segment vortex generator.
Environ Sci Pollut Res Int
May 2023
Faculty of Heat and Refrigeration Engineering, Industrial University of Ho Chi Minh City (IUH), 12 Nguyen Van Bao, Go Vap District, Ho Chi Minh City, 700000, Vietnam.
Hybrid turbulators have been introduced as a feasible solution to improve heat transfer in fluid channels. In this study, a perforated circular segment was used as a vortex generator to enhance the heat transfer rate in an air collector duct. The effects of key parameters, including Reynolds numbers ranging from 6000 to 18,000 (four values), angles of attack from 30 to 90° (five values), and inline and staggered segment arrangements, on heat transfer, pressure loss, and thermohydraulic performance were investigated.
View Article and Find Full Text PDFPronephros and mesonephros characterization during the embryonic development of the giant South American river turtle, Podocnemis expansa (Podocnemididae: Testudines).
Anat Rec (Hoboken)
August 2023
Department of Animal Sciences, Universidade Federal do Semi-Árido, Mossoró, Rio Grande do Norte, Brazil.
This study aimed to describe pronephros and mesonephros morphology during the embryonic development of Podocnemis expansa. Eggs were collected on an artificial beach at Balbina, Amazonas, Brazil, during the entire incubation period (mean of 59 days). The kidney-gonad complex was processed using light microscopy and the mesonephros using transmission electron microscopy.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!