The role of short chain fatty acid substrates in aerobic and glycolytic metabolism in primary cultures of renal proximal tubule cells

Richard D Griner, Michael D. Aleo, Rick G. Schnellmann

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

This study examined the role of odd and even short-chain fatty acid substrates on aerobic and glycolytic metabolism in well-aerated primary cultures of rabbit renal proximal tubule cells (RPTC). Increasing oxygen delivery to primary cultures of RPTC by shaking the dishes (SHAKE) reduced total lactate levels and lactate dehydrogenase (LDH) activity and reduced net glucose consumption compared to RPTC cultured under standard conditions (STILL). The addition of butyrate, valerate, heptanoate, or octanoate to SHAKE RPTC produced variable effects on glycolytic metabolism. Although butyrate and heptanoate further reduced total lactate levels and net glucose consumption during short-term culture (<24 h), no fatty acid tested further reduced total lactate levels, net glucose consumption, or LDH activity during long-term culture (7 days). During the first 12 h of culture, maintenance of aerobic metabolism in SHAKE RPTC was dependent on medium supplementation with fatty acid substrates (2 m M). However, by 24 h, SHAKE RPTC did not require fatty acid substrates to maintain levels of aerobic metabolism equivalent to freshly isolated proximal tubules and greater than STILL RPTC. This suggests that SHAKE RPTC undergo adaptive changes between 12 and 24 h of culture, which give RPTC the ability to utilize other substrates for mitochondrial oxidation, therefore allowing greater expression of mitochondrial oxidative potential in SHAKE RPTC than in STILL RPTC.

Original languageEnglish (US)
Pages (from-to)649-655
Number of pages7
JournalIn Vitro Cellular & Developmental Biology - Animal
Volume29
Issue number8
DOIs
Publication statusPublished - Jan 1 1993

    Fingerprint

Keywords

  • aerobic metabolism
  • fatty acids
  • glucose consumption
  • glycolytic metabolism
  • lactate
  • oxygen consumption
  • renal proximal tubule cells

ASJC Scopus subject areas

  • Developmental Biology
  • Cell Biology

Cite this