Gene: 614 | Name: Cnr2 | Family: GPCR | Subfamily: Cannabinoid | Accession: X86405 | GI: 791081 |
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Gene 614
Summary
of Phenotypic Analysis
There were no significant differences detected in the homozygous mutant and
heterozygous mutant animals when compared with age- and gender-matched
wild-type control mice.
ES cells derived from the 129/OlaHsd mouse substrain were used to generate
chimeric mice. F1 mice were generated by breeding with C57BL/6 females. F2
homozygous mutant mice were produced by intercrossing F1 heterozygous males and
females.
Wild-type control mice, as well as homozygous mutant and heterozygous mutant
mice, were evaluated by the following examinations or tests:
· Physical examination.
· Necropsy, including body length, body weight, and organ weight measurements.
· Histological examination of tissues and organs.
· Bone marrow section evaluation.
· Complete blood counts and differentials.
· Clinical chemistry panels.
· Behavioral testing.
· Fertility evaluation.
· Aging studies.
Gene 614
Behavior
Changes related to genotype:
There were no significant differences
detected in the homozygous animals when compared with age- and gender-matched
wild-type control mice.
Homozygous mutant and wild-type control mice were evaluated for phenotypic
changes by testing on six behavioral tasks: Open field test, Tail
suspension test, Rotarod test, Hot plate test, Startle/PPI, and Metrazol test.
Mouse ID numbers for the N0 generation are as
follows:
10 homozygous mutant males (61502, 56069, 56067, 51651, 51652, 51649, 51647,
51644, 51642, 50487)
10 wild-type control males (50486, 49741, 49738, 49740, 49737, 46491, 45138, 45137,
46489, 49729)
Mouse ID numbers for the N1 generation are as
follows:
11 homozygous mutant males (140464, 161355, 121399, 161352, 134186, 127302,
121409, 127304, 140468, 121397, 121415)
12 wild-type control males (121410, 121407, 121400, 127301, 121412, 140469,
134188, 127303, 161347, 161354, 140465, 127300)
ES cells derived from the 129/OlaHsd mouse substrain were used to generate chimeric mice.
F1 mice were generated by breeding with C57BL/6 females. The resultant F1N0
heterozygotes were backcrossed to C57BL/6 mice to generate F1N1
heterozygotes. F2N1 homozygous mutant
mice were produced by intercrossing F1N1 heterozygous males and females.
Behavior Findings:
There were
no genotype-related differences noted between homozygous mutant and
wild-type control mice for any other parameters evaluated during behavior
testing.
Gene 614
Fertility
Both homozygous mutant males and females were fertile. Their progeny were
viable until weaning.
Two to three homozygous mutant mice of each gender were set up in a fertility
mating with a wild-type mate at seven to eight weeks of age. The number of pups
born from one to three litters were recorded. Three weeks later, the live pups
were counted and weaned.
Mouse ID numbers are as follows:
2 homozygous mutant males (59505, 59504)
2 homozygous mutant females (49718, 45032)
Gene 614
Expression
Summary
RT-PCR Summary:
RNA transcripts are detectable in lung, liver, thymus, spleen, lymph nodes,
bone marrow, skin and testis.
No RNA transcripts are detectable in:
brain, cortex, subcortical region, cerebellum, brainstem, olfactory bulb, eye,
heart, pancreas, kidneys, gallbladder, urinary bladder, pituitary gland,
adrenal gland, salivary gland, skeletal muscle, tongue, stomach, small
intestine, large intestine, cecum, epididymis, seminal vesicle, coagulating
gland, prostate gland, ovary and uterus.
Gene 614
Histopathology
There were no significant differences detected in the homozygous mutant and
heterozygous mutant animals when compared with age- and gender-matched
wild-type control mice.
Tissues from the following mice were evaluated histologically.
49 Day Cohort Mouse ID numbers are as follows:
3 homozygous mutant females (36789, 38259, 38260)
4 homozygous mutant males (36781, 42977, 45417, 60715)
1 heterozygous mutant female (36787)
1 heterozygous mutant male (38255)
2 wild-type control females (36790, 38261)
2 wild-type control males (36782, 36784)
300 Day Cohort Mouse ID numbers are as follows:
2 homozygous mutant females (31724, 42017)
2 homozygous mutant males (49715, 49719)
2 wild-type control females (42975, 42994)
2 wild-type control males (31722, 42992)
No
Significant Abnormalities:
Tissues examined and considered to have no genotypically significant
abnormality: brain, pituitary gland, ears, nasal cavity, salivary glands, oral
cavity, lymph nodes, aorta, lungs, gallbladder, pancreas, spleen, kidneys,
urinary bladder, stomach, small and large intestines, larynx, esophagus,
trachea, thyroid gland, thymus gland, tongue, skeletal muscle, sciatic nerve, mammary
glands, vertebrae, spinal cord, bone (skull, sternum, femur, tibia, and stifle
joint), reproductive tract (including gonads), eyes, Harderian glands,
integumentary system (skin and either clitoral or preputial glands), and bone
marrow.
Bone marrow was examined in sections of sternum, vertebrae, and/or femur and
tibia. Marrow cellularity, myeloid:erythroid (M:E) ratio, myeloid and erythroid
maturation sequences, and numbers of megakaryocytes were evaluated.
Incidental lesions may have been present in some tissues. These findings are
considered to represent background lesions occasionally seen in this strain of
mice, lesions due to spontaneous disease, age-related lesions, lesions due to
procedural artifacts, and/or lesions of a nonspecific etiology. They are not
considered to be genotype related.
Gene 614
Necropsy
There
were no significant differences detected in the homozygous mutant and
heterozygous mutant animals when compared with age- and gender-matched
wild-type control mice.
The
following mice were necropsied. Body weight, body length, and organ weights
were obtained, and gross pathological findings were recorded.
49
Day Mouse ID numbers are as follows:
3 homozygous mutant females (36789, 38259, 38260)
3 homozygous mutant males (42977, 45417, 60715)
1 heterozygous mutant female (36787)
1 heterozygous mutant male (38255)
2 wild-type control females (36790, 38261)
2 wild-type control males (36782, 36784)
300 Day Cohort Mouse ID numbers are as follows:
2 homozygous mutant females (31724, 42017)
2 homozygous mutant males (49715, 49719)
2 wild-type control females (42975, 42994)
2 wild-type control males (31772, 42992)
Mice
were examined for the following observables: adrenal glands, body length, body
weight, bone marrow, bone - cranium, bone - femur, bone - sternum, bone -
stifle joint, bone - vertebral column, brain, cecum, colon, duodenum,
epididymis - seminal vesicle, esophagus, eyes, feces, gallbladder, general
appearance, Harderian glands, heart, heart weight, ileum, jejunum, kidney
weight, kidneys, liver, liver weight, lungs, lymph nodes, mesentery, ovaries,
pancreas, penis, salivary glands, sciatic nerve, scrotum, skeletal muscle,
skin, skinned mouse, spleen, spleen weight, stomach, testes, testes -
epididymis weight, thymus, thymus weight, tongue, trachea, urinary bladder,
urine, uterus, and vagina. (Gender-specific observables apply to appropriate
gender.)
Necropsy Findings:
There were no genotype-related or biologically significant differences noted
between mutant and wild-type control mice for any of the parameters evaluated
at necropsy. Incidental lesions may have been present in some tissues. These
findings were considered to represent background lesions occasionally seen in
this strain of mice, lesions due to spontaneous disease, age-related lesions,
lesions due to procedural artifacts, and/or lesions of a nonspecific etiology.
They were not considered to be genotype related.
Body and Organ Weight Findings:
Differences in body length, body weight, organ weights, and/or organ weight to body
weight ratios were present between individual mice. The variability between
mice usually fell within our historical reference ranges and was not correlated
with genotype.
Gene 614
Clinical
Chemistry
There were no significant differences detected in the homozygous mutant and
heterozygous mutant animals when compared with age- and gender-matched
wild-type control mice.
Serum samples from the following mice were evaluated by a clinical
biochemistry panel.
49 Day Cohort Mouse ID numbers are as follows:
3 homozygous mutant females (38259, 73638, 73641)
3 homozygous mutant males (60712, 60715, 68116)
1 heterozygous mutant female (73639)
2 heterozygous mutant males (64392, 66396)
2 wild-type control females (68115, 73640)
3 wild-type control males (60714, 73631)
90 Day Cohort Mouse ID numbers are as follows:
4 homozygous mutant females (31724, 42017, 42983, 45031)
5 homozygous mutant males (49715, 49719, 59504, 64376, 64395)
5 wild-type control females (42973, 42975, 42976, 42994, 64394)
3 wild-type control males (31722, 42992, 43747)
180 Day Cohort Mouse ID numbers are as follows:
3 homozygous mutant females (31724, 42017, 45031)
3 homozygous mutant males (49715, 49719, 64376)
5 wild-type control females (42973, 42975, 42976, 42994, 64394)
4 wild-type control males (31722, 42992, 43747, 66372)
300 Day Cohort Mouse ID numbers are as follows:
2 homozygous mutant females (31724, 42017)
2 homozygous mutant males (49715, 49719)
2 wild-type control females (42975, 42994)
2 wild-type control males (31722, 42992)
Values
for the various analytes evaluated were generally similar between homozygous
mutant, heterozygous mutant, and wild-type control mice. Variations in clinical
chemistry values, if present, were not consistent with genotype and, thus, were
not considered phenotypically relevant.
Gene 614
Hematology
There
were no significant differences detected in the homozygous mutant and
heterozygous mutant animals when compared with age- and gender-matched
wild-type control mice.
Blood samples from the following mice were evaluated by a complete blood
count and differential cell count. The data were compiled from N0F2 and N1F2
generations.
49 Day Cohort Mouse ID numbers are as follows:
3 homozygous mutant females (38260, 73638, 73641)
3 homozygous mutant males (60715, 66376, 68116)
1 heterozygous mutant female (73639)
1 heterozygous mutant male (73630)
2 wild-type control females (60728, 73640)
2 wild-type control males (60716, 71500)
90
Day Cohort Mouse ID numbers are as follows:
3 homozygous mutant females (42017, 42983, 45031)
5 homozygous mutant males (49697, 49715, 49719, 64376, 64395)
5 wild-type control females (42973, 42975, 42976, 42994, 64394)
2 wild-type control males (42992, 43747)
180 Day Cohort Mouse ID numbers are as follows:
3 homozygous mutant females (31724, 42983, 45031)
4 homozygous mutant males (49715, 49719, 119881, 119882)
4 wild-type control females (42973, 42975, 42976, 42994)
4 wild-type control males (31722, 42992, 43747, 66372)
300 Day Cohort Mouse ID numbers are as follows:
2 homozygous mutant females (31724, 42017)
2 homozygous mutant males (49719, 66383)
2 wild-type control females (42975, 42994)
3 wild-type control males (31722, 42992, 66386)
Although minor variations of hematological values were present in some animals,
these changes were not consistent with genotype and, thus, were not considered
phenotypically relevant.
Gene 614
Physical
Examination
There were no significant differences detected in the homozygous mutant and
heterozygous mutant animals when compared with age- and gender-matched
wild-type control mice.
The following mice were evaluated by physical examination.
49 Day Cohort Mouse ID numbers are as follows:
3 homozygous mutant females (36789, 38259, 38260)
4 homozygous mutant males (36781, 42977, 45417, 60715)
1 heterozygous mutant female (36787)
1 heterozygous mutant male (38255)
2 wild-type control females (36790, 38261)
2 wild-type control males (36782, 36784)
300
Day Cohort Mouse ID numbers are as follows:
2 homozygous mutant females (31724, 42017)
2 homozygous mutant males (49715, 49719)
2 wild-type control females (42975, 42994)
2 wild-type control males (31772, 42992)
Mice
were examined for the following observables: anus, behavior, body shape, claws,
coat - fur, coat color - back, coat color - belly, ear - left, ear - right, eye
- left, eye - right, eye color - left, eye color - right, feces, forelimb -
left, forelimb - right, forelimb number of amputated digits - left, forelimb
number of amputated digits - right, forelimb number of digits - left, forelimb
number of digits - right, general appearance, genitals - female, genitals -
male, hair type, head shape, hindlimb - left, hindlimb - right, hindlimb number
of amputated digits - left, hindlimb number of amputated digits - right,
hindlimb number of digits - left, hindlimb number of digits - right, injuries,
lesions, limb shape, locomotor, lumps - masses, mammary glands, mice in cage,
respiration, skin appearance, snout, swelling - joints, tail, teeth color,
teeth length, urine, and whiskers. (Gender-specific observables apply to
appropriate gender.)
Certain physical findings, including alopecia, are present in one female
homozygote (42017) and two male homozygotes (49714, 49719) that could occur
spontaneously in mice of this age group. Therefore, we are not reporting
these findings as phenotypic changes, but we present them here for your
consideration.
Individual
homozygous mutant and heterozygous mutant mice had only occasional other minor
differences in observed physical features compared to wild-type control mice.
These findings are considered to represent individual variability, background
features occasionally seen in this strain of mice, findings due to spontaneous
disease, age-related findings, procedural artifacts, and/or findings of a
nonspecific etiology. However, none of these differences was regarded as
biologically significant or genotype related.
Gene 614
Aging
Metrics
There were no significant differences detected in the homozygous mutant animals
when compared with age- and gender-matched wild-type control mice.
Body weights and body lengths were measured for mice at 49, 90, 180, and 300
days of age.
49
Day Cohort Mouse ID numbers are as follows:
3 homozygous mutant females (42017, 42983, 45031)
4 homozygous mutant males (49697, 49715, 49719, 64395)
5 wild-type control females (42973, 42975, 42976, 42994, 64394)
2 wild-type control males (42992, 43747)
90 Day Cohort Mouse ID numbers are as follows:
4 homozygous mutant females (31724, 42017, 42983, 45031)
4 homozygous mutant males (49697, 49715, 49719, 64395)
4 wild-type control females (42973, 42975, 42976, 42994)
3 wild-type control males (31722, 42992, 43747)
180 Day Cohort Mouse ID numbers are as follows:
4 homozygous mutant females (31724, 42017, 42983, 45031)
4 homozygous mutant males (49715, 49719, 64376, 64395)
5 wild-type control females (42973, 42975, 42976, 42994, 64378)
4 wild-type control males (31722, 42992, 43747, 66372)
300 Day Cohort Mouse ID numbers are as follows:
4 homozygous mutant females (31724, 42017, 42983, 45031)
5 homozygous mutant males (49715, 49719, 64374, 64376, 64395)
5 wild-type control females (42973, 42975, 42976, 42994, 64378)
3 wild-type control males (31722, 42992, 66372)
Body Weight and Length Findings:
Differences in body length and body weight were present between individual
mice. The variability between mice usually fell within our historical reference
ranges and was not correlated with genotype.