Leukemia inhibitory factor

Source: Wikipedia, the free encyclopedia.
LIF
Gene ontology
Molecular function
Cellular component
Biological process
Sources:Amigo / QuickGO
Ensembl
UniProt
RefSeq (mRNA)

NM_001257135
NM_002309

NM_001039537
NM_008501

RefSeq (protein)

NP_001244064
NP_002300

NP_001034626
NP_032527

Location (UCSC)Chr 22: 30.24 – 30.25 MbChr 11: 4.21 – 4.22 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Leukemia inhibitory factor, or LIF, is an interleukin 6 class cytokine that affects cell growth by inhibiting differentiation. When LIF levels drop, the cells differentiate.

Function

LIF derives its name from its ability to induce the terminal

implantation in the mouse model and possibly in humans.[5] It has been suggested that recombinant human LIF might help to improve the implantation rate in women with unexplained infertility.[6]

Binding/activation

LIF binds to the specific LIF

]

Expression

LIF is normally expressed in the

trophectoderm of the developing embryo, with its receptor LIFR expressed throughout the inner cell mass
. As embryonic stem cells are derived from the inner cell mass at the blastocyst stage, removing them from the inner cell mass also removes their source of LIF. Recombinant LIF has been produced in plants by InVitria.

Use in stem cell culture

LIF is often added to stem cell culture media as an alternative to feeder cell culture, due to the limitation that feeder cells present by only producing LIF on their cell surfaces. Feeder cells lacking the LIF

Stat3). Stat3 is recruited to the activated LIF receptor and phosphorylated by Janus kinase. It bears noting that LIF and Stat3 are not sufficient to inhibit stem cell differentiation, as cells will differentiate upon removal of serum. During the reversibility phase of differentiation from naive pluripotency, it is possible to revert cells back to naive pluripotency through the addition of LIF.[8]
Removal of LIF pushes stem cells toward differentiation, however genetic manipulation of embryonic stem cells allows for LIF independent growth, notably overexpression of the gene Nanog.

LIF is typically added to stem cell culture medium to reduce spontaneous differentiation.[9][10]

References

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000128342Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000034394Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. S2CID 4357527
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  6. .
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  10. ^ "CGS : PTO Finds Stem Cell Patent Anticipated, Obvious in Light of 'Significant Guideposts'". Archived from the original on 2011-10-04.

Further reading

External links