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Cryopreservation Protocols for Genetically Engineered Mice
Author(s) -
Longenecker Glenn,
Cho Kyoungin,
Khillan Jaspal S.,
Kulkarni Ashok B.
Publication year - 2021
Publication title -
current protocols
Language(s) - English
Resource type - Journals
ISSN - 2691-1299
DOI - 10.1002/cpz1.138
Subject(s) - cryopreservation , sperm , biology , embryo cryopreservation , embryo , andrology , reproductive technology , embryo transfer , medicine , microbiology and biotechnology , genetics
Abstract Protocols for cryopreservation of mouse embryos and sperm are important for preserving genetically engineered mice (GEMs) used in research to study human development and diseases. Embryo cryopreservation is mainly carried out using either of two protocols: controlled gradual cooling or vitrification. Sperm cryopreservation protocols include two methodologies that are commonly referred to as JAX and CARD. Quality‐control measures are necessary to ensure that GEMs are properly cryopreserved so that they can be retrieved for future use. An archiving system is also important in keeping proper records of frozen sperm and embryos. Frozen embryos and sperm are now preferred over live mice for shipping to distant locations. This article describes detailed protocols used in cryopreservation of mouse embryos and sperm, as well as their retrieval to live mice. © 2021 U.S. Government. This article was corrected on 28 July 2022. See the end of the full text for details. Sperm cryopreservationBasic Protocol 1 : JAX protocol for sperm cryopreservation Support Protocol 1 : JAX protocol for making sperm cryopreservation medium Basic Protocol 2 : JAX protocol for IVF of mouse sperm Alternate Protocol 1 : Modified CARD protocol for sperm cryopreservation Support Protocol 2: CARD protocol for making sperm cryopreservation medium Alternate Protocol 2 : CARD protocol for IVF of mouse sperm Embryo cryopreservationBasic Protocol 3 : Cryopreserving and thawing 2‐cell embryos Alternate Protocol 3 : Cryopreserving and thawing 8‐cell to morula‐stage embryos Surgical transfer of embryosBasic Protocol 4 : Infundibulum transfer of 2‐cell to morula‐stage embryos