2020
DOI: 10.1158/1538-7445.am2020-3745
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Abstract 3745: Exogenous and endogenous sources of serine contribute to colon cancer metabolism and growth

Abstract: Serine is a non-essential amino acid that is generated by the sequential actions of phosphoglycerate dehydrogenase (PHGDH), phosphoserine aminotransferase (PSAT1) and phosphoserine phosphatase (PSPH). Increased serine biosynthesis occurs in several cancers and supports tumor growth. In addition to serine synthesis, exogenous serine is taken up by cells and can also fuel tumor growth. Interestingly, colon cancer cells increase expression of serine biosynthesis enzymes in the absence of exogenous serine, suggest… Show more

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“…5-FU resistance has been linked to PSAT1 overexpression since combined CRISPR-based deletion of PSAT1 and serine withdrawal suppressed CRC xenograft tumor growth and enhanced the sensitivity to 5-FU by increasing DNA damage and diminishing the nucleotide pool, resulting in cell death. Thus, this study suggests that both endogenous and exogenous serine contributes to CRC growth and resistance to 5-FU [ 77 ].…”
Section: Activation Of De Novo Serine/glycine Biosynthesis and Trementioning
confidence: 99%
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“…5-FU resistance has been linked to PSAT1 overexpression since combined CRISPR-based deletion of PSAT1 and serine withdrawal suppressed CRC xenograft tumor growth and enhanced the sensitivity to 5-FU by increasing DNA damage and diminishing the nucleotide pool, resulting in cell death. Thus, this study suggests that both endogenous and exogenous serine contributes to CRC growth and resistance to 5-FU [ 77 ].…”
Section: Activation Of De Novo Serine/glycine Biosynthesis and Trementioning
confidence: 99%
“…The therapeutic strategies targeting serine/glycine metabolism include limiting the availability of exogenous serine and glycine in serine uptake-dependent cancers by diet restriction and targeting the enzymes of de novo serine/glycine biosynthesis pathway [ 16 , 77 , 155 ]. Therefore, it is essential to determine which cancer patients would benefit from these strategies.…”
Section: Future Perspectives: Therapeutic Targeting Of De Novo Sermentioning
confidence: 99%