The Brindley's glands of Rhodnius prolixus. I. Structure of the mature gland

1979 ◽  
Vol 57 (5) ◽  
pp. 1109-1119 ◽  
Author(s):  
F. M. Barrett ◽  
B. F. Millen ◽  
J. Lai-Fook
Keyword(s):  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Functional Significance ◽  
Type A ◽  
Rhodnius Prolixus ◽  
Type B ◽  
Electron Microscopic ◽  
Dermal Glands ◽  
Similarities And Differences ◽  
Secretory Apparatus

A detailed light and electron microscopic study of the Brindley's glands of adult Rhodnius prolixus has confirmed the presence of type B glandular units similar to those described for the dermal glands of Rhodnius and has identified the second type A glandular unit, also composed of secretory apparatus, saccule, and duct, but outnumbered approximately 18:1 by the type B units. Similarities and differences between type A and type B glandular units are described and the possible functional significance of the two types of unit is discussed.

scholarly journals Parathyroid carcinoma of the oxyphil cell type. A report of two cases, light and electron microscopic study

Cancer ◽  
1985 ◽  
Vol 55 (7) ◽  
pp. 1482-1489 ◽  
Author(s):  
Takao Obara ◽  
Yoshihide Fujimoto ◽  
Kazuyoshi Yamaguchi ◽  
Riichiro Takanashi ◽  
Isamu Kino ◽  
...  
Keyword(s):  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Parathyroid Carcinoma ◽  
Type A ◽  
Cell Type ◽  
Electron Microscopic ◽  
Oxyphil Cell

The Brindley's glands of Rhodnius prolixus. II. Development of the glands during the fifth instar

1979 ◽  
Vol 57 (5) ◽  
pp. 1120-1128 ◽  
Author(s):  
B. F. Millen ◽  
F. M. Barrett ◽  
J. Lai-Fook
Keyword(s):  
Type A ◽  
Rhodnius Prolixus ◽  
Glandular Epithelium ◽  
Secretory Cells ◽  
Type B ◽  
Duct Cells ◽  
Secretory Apparatus

The histology of the developing Brindley's gland of adult Rhodnius is described. The presumptive epithelium from which the gland will develop is distinguishable on the 4th day after feeding the fifth instar by its intense stainability. The epithelium thickens and lengthens through rapid mitosis resulting in a hollow, thick-walled sac with a short duct. The duct cells become distinguishable first, then glandular epithelium and the saccules and eventually the secretory apparatus of the secretory cells. Mitosis continues, at a decreasing rate, until the 20th day after feeding, somewhat later than it would occur in the surrounding integument. Just prior to ecdysis the type A glandular units are indistinguishable from those of the adult; however, the type B units appear somewhat less completely developed.

AN ELECTRON MICROSCOPIC STUDY OF THE PARATHYROID GLANDS IN MAN: EVIDENCE OF SECRETORY MATERIAL

1969 ◽  
Vol 61 (2) ◽  
pp. 334-342 ◽  
Author(s):  
Richard J. Weymouth ◽  
Hugo R. Seibel
Keyword(s):  
Endothelial Cells ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Functional Significance ◽  
Metabolic Process ◽  
Parathyroid Glands ◽  
Secretory Material ◽  
Electron Microscopic ◽  
Dense Bodies ◽  
Transitional Cells

ABSTRACT The ultrastructure of one hyperplastic and three adenomatous parathyroid glands have been described. Electron dense bodies measuring 0.08–0.5 microns in diameter and similar to those reported by Roth & Munger (1962) and Weymouth & Sheridan (1966) were described. These bodies were increased in number in the pathological glands, observed primarily at the vascular pole of the cell and frequently within the adjoining endothelial cells. Similar structures were found frequently within the mitochondria. In all probability, these electron dense bodies represent secretory material; the mitochondria play an intimate role in this metabolic process of secretion. Large, whorl-shaped structures, composed of concentric membranes, were also described. These structures may be of functional significance in hypersecreting glands, since they were observed in the pathological parathyroid glands only. »Transitional« cells were readily apparent.

The Growth of Herpesvirus mulatto in Human Fibroblast

1974 ◽  
Vol 32 ◽  
pp. 244-245
Author(s):  
Glennelle Washington ◽  
Philip P. McGrath ◽  
Peter R. Graze ◽  
Ivor Royston
Keyword(s):  
Rhesus Monkey ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Peripheral Blood ◽  
Human Fibroblast ◽  
Rhesus Monkeys ◽  
Human Fibroblasts ◽  
Electron Microscopic ◽  
Specific Antisera ◽  
Peripheral Blood Leucocytes

Herpes-like viruses were isolated from rhesus monkey peripheral blood leucocytes when co-cultivated with WI-38 cells. The virus was originally designated rhesus leucocyte-associated herpesvirus (LAHV) and subsequently called Herpesvirus mulatta (HVM). The original isolations were from juvenile rhesus monkeys shown to be free of antibody to rhesus cytomegalic virus. The virus could only be propagated in human or simian fibroblasts. Use of specific antisera developed from HVM showed no relationship between this virus and other herpesviruses. An electron microscopic study was undertaken to determine the morphology of Herpesvirus mulatta (HVM) in infected human fibroblasts.

Cell Wall Ultrastructure in Three Strains of a Cariogenic Streptococcus

1971 ◽  
Vol 29 ◽  
pp. 338-339
Author(s):  
M. J. Kramer ◽  
Alan L. Coykendall
Keyword(s):  
Cell Wall ◽  
Dental Caries ◽  
Streptococcus Mutans ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Genetic Heterogeneity ◽  
Morphological Characteristics ◽  
Electron Microscopic ◽  
Dna Reassociation ◽  
Wall Ultrastructure

During the almost 50 years since Streptococcus mutans was first suggested as a factor in the etiology of dental caries, a multitude of studies have confirmed the cariogenic potential of this organism. Streptococci have been isolated from human and animal caries on numerous occasions and, with few exceptions, they are not typable by the Lancefield technique but are relatively homogeneous in their biochemical reactions. An analysis of the guanine-cytosine (G-C) composition of the DNA from strains K-1-R, NCTC 10449, and FA-1 by one of us (ALC) revealed significant differences and DNA-DNA reassociation experiments indicated that genetic heterogeneity existed among the three strains. The present electron microscopic study had as its objective the elucidation of any distinguishing morphological characteristics which might further characterize the respective strains.

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