Nest cell lining of the solitary beeHylaeus bisinuatus (Hymenoptera: Colletidae)

1992 ◽  
Vol 48 (4) ◽  
pp. 414-416 ◽  
Author(s):  
K. E. Espelie ◽  
J. H. Cane ◽  
D. S. Himmelsbach
Keyword(s):  
Nest Cell ◽  
Cell Lining ◽  
Nest Cell Lining

Dufour's gland and its role in secretion of nest cell lining in bees of the genusColletes (Hymenoptera: Colletidae)

1980 ◽  
Vol 6 (3) ◽  
pp. 549-564 ◽  
Author(s):  
K. R. Albans ◽  
R. T. Aplin ◽  
J. Brehcist ◽  
J. F. Moore ◽  
C. O'toole
Keyword(s):  
Dufour's Gland ◽  
Dufour’S Gland ◽  
Nest Cell ◽  
Cell Lining ◽  
Nest Cell Lining

scholarly journals Antimicrobial Activities and Postantibiotic Effects of Clarithromycin, 14-Hydroxy-Clarithromycin, and Azithromycin in Epithelial Cell Lining Fluid against Clinical Isolates ofHaemophilus influenzae and Streptococcus pneumoniae

1999 ◽  
Vol 43 (5) ◽  
pp. 1291-1293 ◽  
Author(s):  
Kimberly L. Bergman ◽  
Keith M. Olsen ◽  
Tom E. Peddicord ◽  
Paul D. Fey ◽  
Mark E. Rupp
Keyword(s):  
Antimicrobial Activity ◽  
Streptococcus Pneumoniae ◽  
Epithelial Cell ◽  
Haemophilus Influenzae ◽  
Antimicrobial Activities ◽  
Postantibiotic Effect ◽  
Drug Concentrations ◽  
Ofhaemophilus Influenzae ◽  
Cell Lining ◽  
Epithelial Cell Lining

ABSTRACT The antimicrobial activity of concentrations of selected macrolides found in epithelial cell lining fluid was investigated. Clarithromycin demonstrated greater potency and a significantly longer postantibiotic effect (PAE) than azithromycin againstStreptococcus pneumoniae. Azithromycin displayed greater potency, faster killing, and a longer PAE than clarithromycin againstHaemophilus influenzae. Drug concentrations in epithelial cell lining fluid similar to those found in tissue did not improve the synergistic potential of 14-hydroxy-clarithromycin and indicate that a maximal PAE may exist despite increasing concentrations of drug.

scholarly journals Ectopic Solitary Cortical Anaplastic Ependymoma in a Child: A Rare Entity with Short Illustrative Review

2017 ◽  
Vol 07 (03) ◽  
pp. 249-252
Author(s):  
Sachin Guthe ◽  
Pravin Survashe ◽  
Vernon Velho ◽  
Laxmikant Bhopale ◽  
Poonam Darade
Keyword(s):  
Rare Case ◽  
Ependymal Cell ◽  
Age Group ◽  
Pediatric Age ◽  
Rare Entity ◽  
Total Excision ◽  
Anaplastic Ependymoma ◽  
Pediatric Age Group ◽  
Cell Lining

AbstractEpendymomas are usually infratentorial and intraventricular. They originate from the ependymal cell lining of the ventricles. Cortical extraventricular supratentorial ependymomas are rare and fewer than 15 cases are reported worldwide. In pediatric age group, seven cases are reported. We report a rare case of 4-year-old boy with right frontoparietal anaplastic ependymoma who underwent gross total excision of lesion.

scholarly journals Activation of platelet heparitinase by tumor cell-derived factors

Blood ◽  
1991 ◽  
Vol 78 (3) ◽  
pp. 789-796 ◽  
Author(s):  
A Haimovitz-Friedman ◽  
DJ Falcone ◽  
A Eldor ◽  
V Schirrmacher ◽  
I Vlodavsky ◽  
...  
Keyword(s):  
Tumor Cells ◽  
Mammalian Cells ◽  
Human Platelets ◽  
Native Form ◽  
Heat Stable ◽  
Inactive Form ◽  
Cell Lining ◽  
Mouse Lymphoma

Abstract The nature of the cooperation between platelets and tumor cells during the process of blood-borne metastasis is essentially unknown. In previous in vitro studies we showed that platelets participated in the formation of gaps in the endothelial cell lining, and that concomitantly heparan sulfate glycosaminoglycans were degraded by the platelet heparitinase, released on activation of platelets. In the current study we show that the ability to degrade proteoheparan sulfate derived from endothelial extracellular matrix is gradually eliminated when the number of human platelets is decreased from 5 x 10(7) to 10(6) cells/mL. When aliquots of conditioned media or lysates of either Eb or heat-inactivated ESb mouse lymphoma cells (both of which showed no heparanase activity) were added to freeze-thawed lysates of 10(6) platelets, a reappearance of platelet heparitinase activity was observed. A similar activation was not elicited by lysates of several normal mammalian cells. These data suggest that in its native form, a fraction of the platelet heparitinase is stored in an inactive form that can be activated by a factor secreted by lymphoma, but not by normal cells. Partial characterization of the heparitinase-activating factor showed that it is a heat-stable polyanionic molecule, devoid of proteolytic activity and resistant to both proteolytic and chondroitinase digestions. Activation of platelet heparitinase was also observed on coincubation with chondroitinases ABC and AC, suggesting that the inactive form of platelet heparitinase could result from a complex formation with a chondroitinase-sensitive proteoglycan. The lymphoma-derived heparitinase activating factor itself is, however, not a chondroitinase, because activity of chondroitinase could not be detected in Eb and ESb cells. A possible mechanism by which tumor cells recruit and regulate the activity of platelet heparitinase, and its relevance to the progression of blood borne metastasis, is discussed.

Changes in the epithelium of Rathke cleft cyst associated with inflammation

2002 ◽  
Vol 96 (2) ◽  
pp. 209-216 ◽  
Author(s):  
Seiji Hama ◽  
Kazunori Arita ◽  
Takashi Nishisaka ◽  
Toshiyuki Fukuhara ◽  
Atsushi Tominaga ◽  
...  
Keyword(s):  
Squamous Metaplasia ◽  
Thyroid Stimulating Hormone ◽  
Columnar Cell ◽  
Cell Hyperplasia ◽  
Cuboidal Cell ◽  
Content Type ◽  
End Stage ◽  
Cell Lining ◽  
Fine Print ◽  
Stratified Epithelia

Object. Rathke cleft cysts (RCCs) are composed of tall, well-differentiated, ciliated columnar epithelia. Their structures are altered by hyperplasia or squamous metaplasia, but their cause remains unknown. Methods. The authors studied pathological findings and anterior pituitary function in 20 patients harboring RCCs. They classified RCC epithelium as either single (a single ciliated columnar cell lining or a flattened cuboidal cell lining) or stratified (a stratified ciliated columnar cell lining, basal cell hyperplasia, columnar cell hyperplasia, or squamous metaplasia). Inflammation was classified as acute, subacute, chronic, or end stage. The epithelial cell lining was observed in 13 specimens obtained during surgery (six specimens contained single and seven contained stratified epithelia). Inflammation had penetrated the cyst epithelium or subjacent stroma in 10 patients, and the stage of inflammation correlated well with the type of epithelia group: early stages of inflammation in the single epithelium group and chronic or end-stage inflammation in the stratified epithelia (p = 0.0027). The adenohypophysis was identified in 21 surgical specimens. Postoperatively, growth hormone (p = 0.019), cortisol (p = 0.027), and thyroid-stimulating hormone (p = 0.039) responses significantly worsened as the inflammation progressed. The presence of diabetes insipidus correlated well with advanced stages of neurohypophysitis (p = 0.025). Conclusions. Epithelial stratification in the RCC is caused by inflammation that may extend into the adjacent adenohypophysis or neurohypophysis and overwhelm the hypophysis, resulting in panhypopituitarism. Transsphenoidal excision may represent the best choice for treatment, at least for cases of RCC in which there is partial impairment of hypophysial function.

scholarly journals An Unusual Presentation of Idiopathic Lymphatic Cyst of the Thigh

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Chairat Burusapat ◽  
Sophilak Sringkarawat ◽  
Sineenard Thanapurirat ◽  
Rapeepat Sapruangthong ◽  
Chatchai Pruksapong ◽  
...  
Keyword(s):  
Definitive Diagnosis ◽  
Magnetic Resonance Imaging Scan ◽  
Resonance Imaging ◽  
Lymphatic Malformations ◽  
Simple Cyst ◽  
Lymphatic Cyst ◽  
Immunohistochemical Studies ◽  
Cell Lining ◽  
Lymphatic Fluid ◽  
Growing Mass

Lymphatic cyst is a collection of lymphatic fluid with an epithelial lining which can either represent lymphatic malformations or may occur after trauma or operation. Idiopathic lymphatic cyst of the thigh in adulthood is extremely rare. We report a case of a 27-year-old Thai female presented with a rapidly growing mass over her right thigh. The magnetic resonance imaging scan demonstrated a well-defined, thin rim, enhancing simple cyst. The cyst disappeared for a few days after aspiration. Completed surgical resection was performed for definitive diagnosis and treatment. Immunohistochemical studies revealed the cell lining was positive for CD34, CD31, and D2-40 and negative for calretinin. To our best knowledge, idiopathic lymphatic cyst of the thigh in young adult has never been reported and should be kept in mind in the patient who presents with abnormal thigh mass.

A New Cardiac Wall Substitute with High Affinity for Fibroblasts that Can Induce an Endothelial Cell Lining

ASAIO Journal ◽  
1994 ◽  
Vol 40 (3) ◽  
pp. M751-M756 ◽  
Author(s):  
Y Noishiki ◽  
K Takahashi ◽  
K Yamamoto ◽  
M Mo ◽  
A Matsumoto ◽  
...  
Keyword(s):  
Endothelial Cell ◽  
High Affinity ◽  
Cardiac Wall ◽  
Cell Lining

scholarly journals Congenital cyst in female accessory spleen: a case report

2021 ◽  
Vol 2 (1) ◽  
pp. 15-20
Author(s):  
Eclair Lucas Filho ◽  
Fernando Fernandes Rodrigues ◽  
Natalia Verzeletti Oliveira
Keyword(s):  
Abdominal Pain ◽  
Mesothelial Cell ◽  
Accessory Spleen ◽  
Recurrent Abdominal Pain ◽  
World Population ◽  
Incidental Diagnosis ◽  
Splenic Cysts ◽  
The World ◽  
Splenic Resection ◽  
Cell Lining

Cysts found in splenic stores, of parasitic or non-parasitic origin, are rare causes of recurrent abdominal pain, but with a significant increase in the number of diagnoses in recent years. This condition is caused by the derivation of the mesothelial cell lining of the spleen capsule, occurring in 0.5 - 2% of the world population. Clinically, patients tend to remain asymptomatic for years and usually have an incidental diagnosis by imaging exams or during the investigation of diffuse and recurrent abdominal pain, rarely found in females. The treatment of splenic cysts is performed through video laparoscopic splenic resection.

scholarly journals A bilateral gynandromorph of Discoelius dufourii (Hymenoptera, Vespidae, Zethinae): morphology and mating behaviour

2021 ◽  
Vol 81 ◽  
pp. 23-41
Author(s):  
Anna Budrienė ◽  
Eduardas Budrys ◽  
Svetlana Orlovskytė
Keyword(s):  
Mating Behaviour ◽  
Male Mating ◽  
Conspecific Female ◽  
Sexual Behaviours ◽  
Behavioural Interactions ◽  
Males And Females ◽  
Nest Cell ◽  
Normal Males ◽  
Predatory Wasp ◽  
Trap Nest

A gynandromorph is an organism combining both female- and male-type tissues. While the vast majority of studies have described the morphology of gynandromorphs, their sexual behaviours remain under-explored. We studied a predominantly bilateral gynandromorph specimen of the predatory wasp Discoelius dufourii (Hymenoptera: Vespidae: Zethinae) reared from a trap-nest. In addition to describing the morphology, we explored the gynandromorph’s response to a conspecific female, comparing it with the behavioural interactions between normal males and females of D. dufourii and the phylogenetically related D. zonalis. For most specific behavioural elements, males of both Discoelius species exhibited a greater frequency and a higher probability of occurrences of the behaviour than did females. However, aggression and plopping behaviours were prevalent in females. The gynandromorphic specimen demonstrated behavioural activities similar to those of a male, including a relatively frequent mate body antennation and an attempt to mount a female. However, it approached the female less frequently in comparison to conspecific normal males, and it did not demonstrate substrate antennation and jumping, typical of Discoelius male mating behaviour. Based on the parameters of the nest cell, the probability of the development of the gynandromorphic specimen from an unfertilized (male) egg was higher than the probability of development from a fertilized (female) egg.

scholarly journals A further study of the nesting biology of Leptochilus (Neoleptochilus) regulus (de Saussure, 1855) (Hymenoptera, Vespidae, Eumeninae)

2021 ◽  
Vol 84 ◽  
pp. 75-86
Author(s):  
Alexander V. Fateryga ◽  
Valentina V. Fateryga
Keyword(s):  
Building Material ◽  
Time Budget ◽  
Tree Bark ◽  
Nesting Biology ◽  
Wasp Species ◽  
Trap Nests ◽  
Additional Amount ◽  
Dry Soil ◽  
Nest Cell ◽  
Prey Items

Two females of Leptochilus regulus (de Saussure, 1855) were observed nesting in reed stalks of a Fabre’s hive serving as a block of trap nests in Crimea, with the timekeeping of all their nesting behaviours. The building material used by the females to separate the nesting cavity into the cells consisted of pellets of dry soil, gravel particles, and small fragments of tree bark, leaves, and thin stems. Females rapidly carried these items collected in 1.0–1.5 m from the nests. They bonded only the last portions of the building material in each “partition” with a very small amount of mud. An additional amount of unbonded building material items was deposited into the nest after sealing the last nest cell. Females hunted exclusively for small larvae of an anobiid beetle (Coleoptera, Anobiidae); they stored 19–37 prey items per cell. Hunting and provisioning occupied the largest portion of the females’ time budget. Duration of hunting flights was different between the females. The nests of both females contained three brood cells. Cocoons of Chrysis ragusae De Stefani, 1888 (Hymenoptera, Chrysididae) were found in the nests; females of this cuckoo wasp species were also recorded entering the host nests at the stage of provisioning, acting apparently as inquilines. The cocoon ultrastructure of L. regulus is illustrated and discussed.

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