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Ribonucleotides differentially modulate oral glutamate detection thresholds.
Amado, Nicholas J; Hanselman, Emily C; Harmon, Caroline P; Deng, Daiyong; Alarcon, Suzanne M; Sharples, Ashley A; Breslin, Paul A S.
Afiliación
  • Amado NJ; Department of Nutritional Sciences, Rutgers University, 65 Dudley Rd, New Brunswick, NJ 08901, United States.
  • Hanselman EC; Department of Nutritional Sciences, Rutgers University, 65 Dudley Rd, New Brunswick, NJ 08901, United States.
  • Harmon CP; Department of Nutritional Sciences, Rutgers University, 65 Dudley Rd, New Brunswick, NJ 08901, United States.
  • Deng D; Department of Nutritional Sciences, Rutgers University, 65 Dudley Rd, New Brunswick, NJ 08901, United States.
  • Alarcon SM; Department of Nutritional Sciences, Rutgers University, 65 Dudley Rd, New Brunswick, NJ 08901, United States.
  • Sharples AA; AUGenomics, 9276 Scranton Rd, Suite 200, San Diego, CA 92121, United States.
  • Breslin PAS; Department of Nutritional Sciences, Rutgers University, 65 Dudley Rd, New Brunswick, NJ 08901, United States.
Chem Senses ; 492024 01 01.
Article en En | MEDLINE | ID: mdl-38197318
ABSTRACT
The savory or umami taste of the amino acid glutamate is synergistically enhanced by the addition of the purines inosine 5'-monophosphate (IMP) and guanosine 5'-monophosphate (GMP) disodium salt. We hypothesized that the addition of purinergic ribonucleotides, along with the pyrimidine ribonucleotides, would decrease the absolute detection threshold of (increase sensitivity to) l-glutamic acid potassium salt (MPG). To test this, we measured both the absolute detection threshold of MPG alone and with a background level (3 mM) of 5 different 5'-ribonucleotides. The addition of the 3 purines IMP, GMP, and adenosine 5'-monophosphate (AMP) lowered the MPG threshold in all participants (P < 0.001), indicating they are positive modulators or enhancers of glutamate taste. The average detection threshold of MPG was 2.08 mM, and with the addition of IMP, the threshold was decreased by approximately 1.5 orders of magnitude to 0.046 mM. In contrast to the purines, the pyrimidines uridine 5'-monophosphate (UMP) and cytidine 5'-monophosphate (CMP) yielded different results. CMP reliably raised glutamate thresholds in 10 of 17 subjects, suggesting it is a negative modulator or diminisher of glutamate taste for them. The rank order of effects on increasing sensitivity to glutamate was IMP > GMP> AMP >> UMP// CMP. These data confirm that ribonucleotides are modulators of glutamate taste, with purines enhancing sensitivity and pyrimidines displaying variable and even negative modulatory effects. Our ability to detect the co-occurrence of glutamate and purines is meaningful as both are relatively high in evolutionarily important sources of nutrition, such as insects and fermented foods.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ribonucleótidos / Ácido Glutámico Tipo de estudio: Diagnostic_studies Límite: Humans Idioma: En Revista: Chem Senses Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Ribonucleótidos / Ácido Glutámico Tipo de estudio: Diagnostic_studies Límite: Humans Idioma: En Revista: Chem Senses Año: 2024 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Reino Unido