Acidic intracellular pH shift during Caenorhabditis elegans larval development

Journal Article · Tue Nov 01 00:00:00 EST 1988 · Proceedings of the National Academy of Sciences of the United States of America; (USA)

DOI:https://doi.org/10.1073/pnas.85.22.8435· OSTI ID:5544566

Wadsworth, W G; Riddle, D L ^[1]

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1. Univ. of Missouri, Columbia (USA)

During recovery from the developmentally arrested, nonfeeding dauer stage of the nemotode Caenorhabditis elegans, metabolic activation is accompanied by a decrease in intracellular pH (pH{sub i}). Phosphorus-31 nuclear magnetic resonance ({sup 31}P NMR) analyses of perchloric acid extracts show that inorganic phosphate predominates in dauer larvae, whereas ATP and other high-energy metabolites are abundant within 6 hr after dauer larvae have been placed in food to initiate development. Although metabolic activation has been associated with an alkaline pH{sub i} shift in other organisms, in vivo {sup 31}P NMR analysis of recovering dauer larvae shows a pH{sub i} decrease from {approx} 7.3 to {approx} 6.3 within 3 hr after the animals encounter food. This shift occurs before feeding begins, and it coincides with, or soon follows, the developmental commitment to recover from the dauer stage, suggesting that control of pH{sub i} may be important in the regulation of larval development in nematodes.

• OSTI ID: 5544566
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America; (USA), Vol. 85:22; ISSN 0027-8424
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
LARVAE
NUCLEAR MAGNETIC RESONANCE
NEMATODES
ONTOGENESIS
ATP
METABOLIC ACTIVATION
PH VALUE
PHOSPHORUS 31
ASCHELMINTHES
HELMINTHS
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
NUCLEI
NUCLEOTIDES
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
PHOSPHORUS ISOTOPES
RESONANCE
STABLE ISOTOPES
550602* - Medicine- External Radiation in Diagnostics- (1980-)