Mouse biology Flashcards
What is KOMP
Knockout Mouse Project through NIH
goal- knock out every functional gene in mouse genome
What is NorCOMM
North American Conditional Mouse Mutagenesis Project
What is EUCOMM
European Conditional Mouse Mutagenesis Programme
What was the first inbred mouse strain?
DBA
What is the gold standard background strain for GM mice created via homologous recombination?
C57BL/6
What are spontaneous diseases associated with C57BL/6 mice?
melanism, hydrocephalus, hippocampal neurodegenerationn, micropthalmia, anopthalmia, age-related cochlear degeneration + hearing loss, malocclusion
Age lesions of C57BL/6 mice?
amyloidosis, pulmonary proteinosis (esp with moth-eaten phenotype)
Neoplasms of C57BL/6?
lymphoma
hemangiosarcoma
pituitary adenoma
Color of BALB/c mice?
albino
Characteristics of BALB/c mice?
Males prone to fight epicardial mineralization of R ventricle myocardial degeneration auricular thrombosis corneal opacity hypocallosity
Neoplasias common in BALB/c?
lung adenoma
lymphoma
Harderian gland tumor
adrenal adenoma
Color of C3H/He mice?
agouti
Special characteristics of C3H/He mice?
Blind (rd1 mutation) focal myocardial/skeletal mineralization myocardial degeneration age-associated alopecia areata susceptible to MMTV-associated mammary tumors
Primary use of 129 mice?
Embryonic stem cell source
Color of 129 mice?
Dependent on substrain- white-bellied agouti most common; also white, chinchilla, agouti
Special characteristics of 129 mice?
hypocallosity prone to teratomas pulmonary proteinosis megaesophagus common tumors in lungs, Harderian gland, ovary, hemangiosarcoma Blepharitis common
Special characteristics of FVB/N mice?
blind (rd1 mutation)
mammary hyperplasia
hyperplasia or pituitary adenoma of prolactin-secreting cells
tumors in lung, pituitary, Harderian gland, liver, lymphoma, pheochromocytoma
What diseases are common in outbred Swiss mice?
retinal degeneration, amyloidosis
tumors–>pulmonary adenoma, lymphoma, liver tumor, pituitary adenoma, hemangioma/sarcoma
What is the main method of random transgenesis in mice?
pronuclear injection–> transgenes randomly integrate through genome
What is the cause of hermaphroditism in mice undergoing targeted mutagenesis?
Male embryonic stem cells being introduced into female undifferentiated blastocysts
Mouse placentation
Hemochorial
Do mice have an open inguinal canal?
Yes
How are mice sexually dimorphic?
Testes in males
Anogenital distance in pups
Males have larger kidneys with cuboidal epithelium in Bowman’s capsule
Do mice have proteinuria?
Yes, especially mature males
What are Mups?
Mouse urinary proteins- used for scent marking
Are mouse kidneys unipapillate or multipapillate?
unipapillate
Special skeletal characteristics of mice?
No Haversian system
Do rodents have tonsils?
No
How old are mice when they are fully immunocompetent?
6-12w
What strains express the unique immunoglobulin isotype IgG2c?
B6, B10, SJL, NOD
What chromosome is the MHC locus located on in mice?
Chromosome 17
What is special about nude mice? What gene is affected?
T cell deficient
Foxn1
What is special about SCID mice? What gene is affected?
B and T cell deficient
Pksdc1
What is special about beige mice? What gene is affected?
NK cell deficient; see Chediak-Higashi (pale coat, albinism, neuro + eye issues)
Lyst
What chromosome is the Btk gene on?
X-linked
What two strains of mouse have prominent eosinophilic secretory inclusions in gallbladder and middle ear (hyalinosis)?
B6
129
What is the X zone?
Cortical zone of adrenal gland, disappears via vacuolation with male sexual maturity or female pregnancy
What strain doesn’t have post-lactation involution of mammary glands due to hyperplasia of prolactin-producing cells in the pituitary?
FVB
What mouse strain is the only one to have Mus spretus in it?
C57BL/6
What is an aboriginal species?
species that lives independent of humans
What is a commensal species?
coevolved and geographically radiated with human civilization
How many chromosomes do mice have?
40
Is an F1 line self-perpetuating?
No, constantly need to cross from parent strains
What is a mouse strain?
Inbred mouse line developed by at least 20 brother x sister mated generations
What is an isogenic/syngenic mouse?
one that is genetically identical to other mice of the same strain/sex
How many generations must a strain be separated before it becomes a substrain?
- inbred strain separated before F40
- branches separated for 100 generation
What type of mouse is maximally heterozygous?
F1 mice
Type of mouse strain where mice are identical except for a single mutant allele
coisogenic
At what date post-conception are mouse embryos manipulated for pronuclear injection?
0.5 dpc
At what date post-conception are mouse blastocysts manipulated for microinjection of ES?
3.5 dpc
When are mouse zygotes in the morula stage?
2.5 dpc
Mice are superovulated for embryo collection using what two drugs?
PMSG, then 2 days later hCG
Intracytoplasmic sperm injection is done during what stage of division in the mouse oocyte?
a. Telophase I
b. Anaphase I
c. Anaphase II
d. Metaphase I
e. Metaphase II
e. Metaphase II
Which of the following inbred mice strains have a high natural prevalence of mammary tumors?
a. C3H, A, and DBA/2
b. BALB/c, C75BL, and AKR
c. 129, FVB, and BXD
d. XID, nude mice, and CcS
e. CBA, SCID, SWR/J
a. C3H, A, and DBA/2
Which of the following IS NOT a subspecies of Mus musculus?
a. Castaneus
b. Domesticus
c. Molossinus
d. Spretus
d. Spretus
Which of the following statements describes clinical signs associated with choline deficiency in mice?
a. Tremors or convulsions
b. Heart failure
c. Neurological abnormalities
d. Decreased conception
e. Achromotrichia
d. Decreased conception
Which tumor is typically associated with mineral oil, pristane, plastics, and other foreign material injected intraperitoneally in BALB/c mice?
plasmacytoma
Which mouse strain has an induced mutation that results in defective recombinase enzymes, thereby preventing formation of functional B (Ig) and T cell receptors?
a. Nude
b. Xid
c. Rag-1
d. SCID
e. Beige
c. Rag-1
All of the following agents have been successfully used as cryoprotectants for long-term storage of embryos EXCEPT?
a. Dimethyl sulfoxide
b. Ethylene sulfoxide
c. Ethylene glycol
d. Glycerol
e, Erythritol
b. Ethylene sulfoxide