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Conditional phenotype: Tissue-specific knockouts may be lethal or develop neoplasms depending on the tissue involved. Constitutive homozygous deletion of Max results in early embryonic lethality. Conditional deletion of MAX in specific tissues with Trp53 mutations can result in accelerated neuroendocrine cancers (lung, pituitary, thyroid) or, in the case of hematopoietic cells, decreased differentiation.
A targeting vector containing a FRT-flanked pGKNeobpA cassette was designed to insert loxP sites on either side of the Max exon 4. This region encodes nearly the entire helix 2 leucine zipper region of Max necessary for dimerization with MYC and other bHLHZ proteins. The construct was electroporated into 129S4/SvJae-derived AK7 embryonic stem (ES) cells. Correctly targeted ES cells were injected into recipient blastocysts, and chimeric males were bred with FLPeE mice on a 129S4 background to remove the FRT-flanked cassette. Additional breeding's were done with129S4 mice.
Mathsyaraja H, Freie B, Cheng PF, Babaeva E, Catchpole JT, Janssens D, Henikoff S, Eisenman RN. Max deletion destabilizes MYC protein and abrogates Eµ-Myc lymphomagenesis. Genes Dev. 2019 Sep 1;33(17-18):1252-1264. doi: 10.1101/gad.325878.119. Epub 2019 Aug 8. (Medline PMCID: 6719623)
Augert A, Mathsyaraja H, Ibrahim AH, Freie B, Geuenich MJ, Cheng PF, Alibeckoff SP, Wu N, Hiatt JB, Basom R, Gazdar A, Sullivan LB, Eisenman RN, MacPherson D. MAX Functions as a Tumor Suppressor and Rewires Metabolism in Small Cell Lung Cancer. Cancer Cell. 2020 Jul 13;38(1):97-114.e7. doi: 10.1016/j.ccell.2020.04.016. Epub 2020 May 28. (Medline PMCID: 7363581)
Colony Surveillance Program and Current Health Reports
Limited quantities of breeder mice (recovered litter) are available from a cryoarchive; recovered litter usually available to ship in 3 to 4 months.
Cryopreserved material may be available upon request, please inquire to mmrrc@ucdavis.edu for more information.
A Commercial License Agreement from the Donor is required for for-profit entities to use this strain. For more information, please contact Danielle Aaker.
Distribution of this strain requires submission of the MMRRC Conditions of Use (COU). A link to the COU web form will be provided via email after an order has been placed; the form should be completed then or the email forwarded to your institutional official for completion.
A Commercial License Agreement from the Donor is required for for-profit entities to use this strain. For more information, please contact Danielle Aaker
Additional charges may apply for any special requests. Shipping costs are in addition to the basic distribution/resuscitation fees. Information on shipping costs and any additional charges will be provided by the supplying MMRRC facility.
1 The distribution fee covers the expense of rederiving mice from a live mouse; you will receive the resulting litter. The litter will contain at minimum one mutant carrier; the actual number of animals and the gender and genotype ratios will vary. (Typically, multiple breeder pairs can be established from the recovered litter.) Prior to shipment, the MMRRC will provide information about the animals recovered. If you anticipate or find that you need to request specific genotypes, genders or quantities of mice in excess of what is likely from a resuscitated litter, you may discuss available options and pricing with the supplying MMRRC facility.
2 An aliquot contains a sufficient number of embryos (in one or more vials or straws and based on the transfer success rate of the MMRRC facility) to transfer into one to three recipients. The MMRRC makes no guarantee concerning embryo transfer success experienced in the recipient investigator's laboratory. Neither gender nor genotype ratios are guaranteed.
3 An aliquot is one straw or vial with sufficient sperm to recover at least one litter of mice, as per provided protocols, when performed at the MMRRC facility. The MMRRC makes no guarantee concerning the success of these procedures when performed outside the MMRRC facilities.
4 The distribution fee covers the expense of resuscitating mice from the cryo-archive; you will receive the resulting litter. The litter will contain at minimum one mutant carrier; the actual number of animals and the gender and genotype ratios will vary. (Typically, multiple breeder pairs can be established from the recovered litter.) Prior to shipment, the MMRRC will provide information about the animals recovered. If you anticipate or find that you need to request specific genotypes, genders or quantities of mice in excess of what is likely from a resuscitated litter, you may discuss available options and pricing with the supplying MMRRC facility.