Selective Habitation of Bacteria on "Intermediate Soft" Keratin Surfaces of the Rat Tongue

Kaster, A G; Cameron, Ivan L.

doi:10.1177/00220345780570010701

Cited by 8 publications

(8 citation statements)

References 7 publications

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“…In ro dents the filiform papillae consist of a single conical papillae, which is curved posteriorly [11][12][13][14][15][16][17][18][19]. On the buffalo tongue the filiform papillae are also conical [20].…”

Section: Discussionmentioning

confidence: 99%

A Scanning Electron Microscopic Study of the Dorsal Surface of the Human Tongue

Kullaa-Mikkonen

Sorvari²

1985

Cells Tissues Organs

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To study the dorsal surface of the human tongue using a scanning electron microscopy (SEM), tissue specimens were taken from the anterior part of the tongues of 15 individuals aged from 21- to 28-years-old. The formalin-fixed samples were processed routinely for SEM. With SEM the surface of the normal tongue mucosa was shown to be rather evenly covered by filiform papillae, with some fungiform papillae scattered among them. Filiform papillae consisted of two parts: the body and hairs. The mucosal surface of the body was smooth; the squamous epithelial cells were polygonal, and their boundaries were prominent. On the surface of the superficial epithelial cells were parallel or branching microplicae. Each filiform papilla had 6–10 hairs, which were scaled and covered by an extensive plaque of microorganism. The upper surface of the fungiform papillae was smooth; only a few desquamating cells were seen. The superficial cells had a pitted appearance and cell boundaries overlapped. Taste pores, up to 3 pores in a single papilla, were found on the upper surface. Desquamation was more pronounced on the base of the fungiform papillae than on the upper surface. In almost all fungiform papillae some hairs protruded from the base. Parallel microplicae were found on the surface of the superficial cells of the base. The structure and function of the human tongue, as well as the microplicae of its superficial cells, are compared to those of various species of animals.

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Section: Discussionmentioning

confidence: 99%

A Scanning Electron Microscopic Study of the Dorsal Surface of the Human Tongue

Kullaa-Mikkonen

Sorvari²

1985

Cells Tissues Organs

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“…Loss of eeli cohesion with the formation of intercellular clefts between keratinized cells having a microplicated surface all adds to the facilitation of colonization and initial intercellular pseudohyphal intrusion. Interestingly, these areas belonging to the less densely keratinized type are also selective sites for habitation of various bacteria (1,9,10). It seems therefore very likely that epithelial surface architecture and pattern of keratinization are among the factors governing preferential colonization and initial intraepithelial penetration of oral microorganisms.…”

Section: Discussionmentioning

confidence: 99%

“…Selective colonization of microorganisms in the rat mucosa has been described before. For example, selective habitation of various bacteria on rat tongue papillae (1,9) and lingual mandibular gingiva (10) has been demonstrated and these authors have also suggested it to be related to the pattern of keratinization. To elucidate the relationship between sites of Candida infection, the pattern of keratinization and epithelial surface morphology a correlative study of rat oral mucosal surface characteristics using scanning electron microscopy (SEM) and light microscopy (LM), was undertaken.…”

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confidence: 99%

Correlative light microscopic and scanning electron microscopic study of completely and incompletely orthokeratinized rat oral epithelium

Philipsen¹,

Gleaton-Jones

Fisker³

1982

European J Oral Sciences

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– Using light microscope (LM) and scanning electron microscope (SEM) a study of the surface morphology of rat oral epithelium was undertaken. A good correlation was found between the LM and SEM findings in the demonstration of the characteristic differences in surface structure between completely and incompletely orthokeratinized areas of the rat oral epithelium. Completely keratinized epithelium (hard palate and attached gingiva) shows a surface layer of orderly arranged, closely approximated and overlapping cells. The individual cell surface shows a honeycomb pattern of interconnecting ridges surrounding depressions or micropits. Incompletely keratinized epithelium (buccal mucGsaT alveolar sulci, gingival crest and interpapillary area of the dorsum of the tongue) shows a very uneven, corrugated surface layer. There is considerable loss of cell cohesion with the formadoo of wide intercellular clefts. The individual cell surface is characterized by microplicatioris of irregular size and arrangement. The findings of the present investigation are discussed in the light of an idea previously put forward by the authors that a correlation exists between surface morphology of the keratinized rat oral mucosa and colonization and penetration of Candida organisms in experimental candidosis.

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“…The rat filiform papillae have been classified into three distinct types by many researchers. However, another study defined the three types of filiform papillae on the rat tongue as simple conical papillae, giant conical papillae, and true filiform papillae (18).…”

Section: Introductionmentioning

confidence: 99%

“…The true filiform papillae occupy the posterior one third of the tongue (base of tongue). All of the filiform papillae possess a convex as well as a concave surface (18).…”

Section: Introductionmentioning

confidence: 99%

Protective Role of Honey After Lead Toxicity Effect on Albino Rats Lingual Papillae

Waleed¹,

Afaf²,

Sahar³

2016

Alexandria Dental Journal

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INTRODUCTION:Studies concerning exposure of human to lead during daily activities are sometimes leading to many complications. Lead is a poisonous heavy metal, it's toxicity can change the antioxidant balance in biological tissues. Honey is rich in phenolic acids and flavonoids, which exhibit a wide range of biological effects and act as natural antioxidants. OBJECTIVES: (1) To investigate the histological changes in lingual papillae following lead toxicity in experimental rats. (2) To assess the possible protective effects of honey using scanning electron microscopy (SEM). MATERIALS AND METHODS:Thirty two adult male albino rats were divided into four groups, eight rats/ group. Group I (control): 1ml distilled water. Group II (control + honey): 50 mg/kg honey + 1ml distilled water. Group III (lead): 16.5 mg lead acetate. Group IV (honey + lead): 16.5 mg lead acetate + 50 mg/kg honey. All doses were given by oral intubations daily /6 weeks. After 6 weeks, rats were sacrificed, and tongues were dissected out and processed for SEM. RESULTS:In Group II: Increased papillary density of the filiform papillae was noticed. In Group III the filiform papillae were distorted. Some appeared shorter while others had eroded tips and hyperkeratosis. Complete loss of papillae were seen in some samples. Disfigured fungiform papillae with swollen taste buds were seen. In Group IV, filiform and fungiform papillae appeared close to normal with minimal changes. CONCLUSIONS:The atrophy observed in Group III could be explained by lead-induced oxidative stress. Lead toxicity had a dual effect where increased free radical formation together with depletion of endogenous antioxidant enzymes resulted in inflammation and increased cell injury. Lead causes anemia and decreased salivary secretion, which may explain the epithelial erosion. Honey exerted its protective role through restoring enzymatic activity and through its antioxidant mechanism.

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Selective Habitation of Bacteria on "Intermediate Soft" Keratin Surfaces of the Rat Tongue

Cited by 8 publications

References 7 publications

A Scanning Electron Microscopic Study of the Dorsal Surface of the Human Tongue

A Scanning Electron Microscopic Study of the Dorsal Surface of the Human Tongue

Correlative light microscopic and scanning electron microscopic study of completely and incompletely orthokeratinized rat oral epithelium

Protective Role of Honey After Lead Toxicity Effect on Albino Rats Lingual Papillae

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