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Taste Function (taste + function)

Distribution by Scientific Domains

Medical Sciences	50%
Life Sciences	50%

Selected Abstracts

Upregulation of intracellular adhesion molecule (ICAM)-1 and vascular cell adhesion molecule (VCAM)-1 after unilateral nerve injury in the peripheral taste system

JOURNAL OF NEUROSCIENCE RESEARCH, Issue 2 2007
Melissa Ann Cavallin
Abstract In the peripheral taste system, activated macrophages are recruited to both sides of the tongue after unilateral sectioning of the chorda tympani nerve (CT). Neural degeneration elicits macrophage entry in other systems by upregulating vascular adhesion molecules. We hypothesized that CT sectioning leads to a bilateral increase in intracellular adhesion molecule (ICAM)-1 and vascular cell adhesion molecule (VCAM)-1 expression on lingual vessels. To test this hypothesis, rats were euthanized at time points from 6 hr to 7 days post-sectioning. Frozen sections of tongue were processed for immunohistochemical staining for ICAM-1 and VCAM-1. Tongue homogenates from additional rats were analyzed with ELISA. ICAM-1 expression increases first on the denervated side of the tongue at 24 hr post-section and then on the uninjured side at 48 hr post-section. ICAM-1 remains elevated through Day 7 post-sectioning on both sides of the tongue. Dietary sodium restriction, which prevents the macrophage response to nerve sectioning, had no effect on ICAM-1 levels. VCAM-1+ vessels are increased on the denervated side of the tongue at 24,48 hr post-section in control-fed rats. However, dietary sodium restriction prevents the increase. These results indicate that vascular adhesion molecules are differentially regulated by CT sectioning. We suggest that macrophage entry, migration, and modulation of taste function are downstream of dynamic expression of adhesion molecules. © 2006 Wiley-Liss, Inc. [source]

Quality of Life in Advanced Oropharyngeal Carcinoma After Chemoradiation Versus Surgery and Radiation,

THE LARYNGOSCOPE, Issue 9 2006
Sarah E. Mowry MD
Abstract Objective: The objective of this cohort study from a tertiary academic university practice was to identify differences in patients' perceived quality of life after either chemoradiation or surgery and radiation for advanced-stage oropharyngeal carcinoma. Methods: From institutional databases, thirty-five patients were identified who had undergone either primary chemoradiation or primary surgery and postoperative radiation for advanced oropharyngeal cancer (stage II-IV). Patients voluntarily responded by mail using the University of Washington quality-of-life instrument version 4 (UW-QOL). Data were analyzed using ,2 and Wilcoxon tests. Results: There were 17 patients who underwent chemoradiation and 18 patients who underwent surgery and postoperative radiation. All surgical patients had undergone free-flap reconstruction. Patients completed the UW-QOL an average of 25 months after treatment. There was no statistically significant difference between the two groups with regard to any specific domain, including pain, appearance, swallowing, chewing, speech, saliva, or mood. There was a trend toward significance for taste (P = .07) with chemoradiation patients reporting poorer taste function. The lack of difference in the patients' perception of appearance and swallowing was rather surprising given the vastly different treatment modalities. Respondents reported equivalent overall quality of life in response to global quality-of-life questions. Conclusion: Most patients with advanced oropharyngeal carcinoma report good quality of life after treatment, regardless of treatment modality. Although the short-term side effects of treatment may be different between the groups, long-term quality of life is remarkably similar whether the patients choose primary chemoradiation or surgery with postoperative radiation. [source]

Anosmia after general anaesthesia: a case report

ANAESTHESIA, Issue 12 2009
I. Konstantinidis
Summary Although anaesthetic drugs are included among the aetiological factors of anosmia, limited reports exist of anosmia induced by general anaesthesia. We present the case of a 60-year-old female patient with a 3-month history of altered smell and taste immediately after recovery from general anaesthesia for a urological operation. The anaesthetic drugs used were fentanyl, propofol and sevoflurane. Clinical examination and a computed tomography brain scan did not reveal any pathology. Psychophysical testing showed anosmia and normal taste function. Imaging studies using single photon emission computed tomography of the brain were performed twice: as a baseline examination; and after odour stimulation with phenyl ethyl alcohol. Normal brain activity without reaction to odorous stimuli suggested peripheral dysfunction or stimuli transmission problems. The patient, after four months of olfactory retraining, demonstrated significant improvement. The onset of the dysfunction in relation with the imaging findings may imply that anaesthetics could induce the olfactory dysfunction. [source]

Genetics of individual differences in bitter taste perception: lessons from the PTC gene

CLINICAL GENETICS, Issue 4 2005
UK Kim
The ability or inability to taste the compound phenylthiocarbamide (PTC) is a classic inherited trait in humans and has been the subject of genetic and anthropological studies for over 70 years. This trait has also been shown to correlate with a number of dietary preferences and thus may have important implications for human health. The recent identification of the gene that underlies this phenotype has produced several surprising findings. This gene is a member of the T2R family of bitter taste receptor genes. It exists in seven different allelic forms, although only two of these, designated the major taster and major non-taster forms, exist at high frequency outside sub-Saharan Africa. The non-taster allele resides on a small chromosomal region identical by descent, indicating that non-tasters are descended from an ancient founder individual, and consistent with an origin of the non-taster allele preceding the emergence of modern humans out of Africa. The two major forms differ from each other at three amino acid positions, and both alleles have been maintained at high frequency by balancing natural selection, suggesting that the non-taster allele serves some function. We hypothesize that this function is to serve as a receptor for another, as yet unidentified toxic bitter substance. At least some of the remaining five haplotypes appear to confer intermediate sensitivity to PTC, suggesting future detailed studies of the relationships between receptor structure and taste function. [source]