Strain Name    : B6;129-Piwil1tm1Hfl/Mmmh

Stock Number : 029995-MU

Gene Information

(provided by MGI)
Allele Symbol: Piwil1tm1Hfl
Name: targeted mutation 1, Haifan Lin
Alteration at locus: Knockout
Gene Symbol: Piwil1
Name: piwi-like RNA-mediated gene silencing 1
Chromosome: 5
Alteration at locus: Knockout
Genetic Alterations:
15.5 kb of the gene spanning exons 3-22 were replaced with a loxP-flanked PGK-neo cassette preceded by a GFP reporter gene. The targeting event results in a GFP fusion product after the first 9 amino acids of the gene. Western blot and immunofluorescent microscopy of testis from homozygous mutant animals verified the absence of Piwil1 expression.

Genotype Determination:

ES Cell Line: R1 derived from B6;129

Phenotype

Homozygous: Male mice are sterile, with spermatogenesis arrested at the onset of spermiogenesis.

Heterozygous: No detectable phenotype.


Mammalian Phenotype Terms:(provided by MGI)      Extend all MPTs
      assigned by genotype
Piwil1tm1Hfl/Piwil1tm1Hfl
        involves: 129S1/Sv * 129X1/SvJ * C57BL/6J
  • reproductive system phenotype
    • abnormal male germ cell morphology (MGI Ref ID J:77015)
      • degenerating germ cells with pycnotic nuclei and a dramatic increase in apoptotic cells are seen in testes from homozygotes
    • arrest of male meiosis (MGI Ref ID J:77015)
      • no spermatids beyond step 4 of spermatogenesis are seen in homozygotes
    • decreased testis weight (MGI Ref ID J:77015)
      • adult testes are 29% smaller by weight in mutants compared to controls
    • male infertility (MGI Ref ID J:77015)
      • males are completely sterile
  • endocrine/exocrine gland phenotype
    • decreased testis weight (MGI Ref ID J:77015)
      • adult testes are 29% smaller by weight in mutants compared to controls


Strain of Origin: (129X1/SvJ x 129S1/Sv)F1-Kitl+

Strain genetic background:

B6;129

Strain Development: The male chimera was crossed with C57BL/6J. Genomic DNA from the agouti F1 pups was analyzed by PCR for the presence of the mutant allele. Homozygous mice were obtained by crossing heterozygous males to either heterozygous females or homozygous females. The colony was maintained on a mixed genetic background of 129 and C57BL/6J. 

Since transfer to MMRRC, this mixed strain has been backcrossed to C57BL/6N to produce the congenic strain, B6;129-Piwil1tm1Hfl/Mmmh, MMRRC:036896.

Suggested Control Mice:

Wild-type littermates

  • Developmental Biology
  • Reproduction

Donor: Haifan Lin, Ph.D., Yale University School of Medicine

Primary Reference:

Deng W, Lin H. miwi, a murine homolog of piwi, encodes a cytoplasmic protein essential for spermatogenesis. Dev Cell 2002 Jun;2(6):819-30. (Medline PMID: 12062093).

Colony and Husbandry Information

Colony Surveillance Program and Current Health Reports

Mice recovered from a cryo-archive will have health surveillance performed on recipient females. Health reports will be provided prior to shipment. If you require additional health status information, please email mmrrc@missouri.edu.

Coat color: Gray

Other:

MMRRC Breeding System: Random intra-strain breeding

Breeding Scheme(s):

  • Heterozygous female x Heterozygous male
  • Homozygous female x Homozygous male

Generation: Unspecified

Overall Breeding Performance: Good

Viability and Fertility:FemaleMaleComments
Homozygotes are viable: Yes Yes
Homozygotes are fertile: Yes No
Heterozygotes are fertile: Yes Yes
Age Reproductive Decline: 12 12

Average litter size: Unspecified

Recommended wean age: 3 weeks

Order Request Information

Limited quantities of breeder mice (recovered litter) are available from a cryoarchive; recovered litter usually available to ship in 3 to 4 months.

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.The donor or their institution limits the distribution to non-profit institutions only.
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.
Click button to Request this one strain. (Use the MMRRC Catalog Search to request more than one strain.)
MMRRC Item # Description
Distribution
Fee/unit (US $)
Units Notes
029995-MU-RESUSLitter recovered from cryo-archive
$2,022.00
Non-Profit
Litter Recovered litter1; additional fees for any special requests.
029995-MU-SPERMCryo-preserved spermatozoa
$437.00
Non-Profit
Aliquot Approximate quantity.2

1 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.

2 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.

3 An aliquot contains a sufficient number of embryos (in one or more vials and based on the transfer success rate of the MMRRC facility) to transfer to at least two recipients. The MMRRC makes no guarantee concerning embryo transfer success experienced in the recipient investigator's laboratory. Neither gender nor genotype ratios are guaranteed.

To request material from the MMRRC: Please fill out our on-line request form (accessible from the catalog search results page, or click the Request this Strain button in the fees section above). If you have questions or need assistance completing this form, you may call Customer Service at (800) 910-2291 (in USA or Canada) or (530) 757-5710 (international calls). Before you call, please have with you: the MMRRC item number, quantity needed, Bill-to and Ship-to contact information.



To request material from the MMRRC: Please fill out our on-line request form (accessible from the catalog search results page, or click the Request this Strain button in the fees section). If you have questions or need assistance completing this form, you may call Customer Service at (800) 910-2291 (in USA or Canada) or (530) 757-5710 (international calls). Before you call, please have with you: the MMRRC item number, quantity needed, Bill-to and Ship-to contact information.