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Phenotypes associated with this allele
Allele Symbol
Allele Name
Allele ID
Bcl2tm1Sjk
targeted mutation 1, Stanley J Korsmeyer
MGI:1857134
Summary 3 genotypes
Jump to Allelic Composition Genetic Background Genotype ID
hm1
Bcl2tm1Sjk/Bcl2tm1Sjk B6;129S2-Bcl2tm1Sjk/J MGI:3692964
hm2
Bcl2tm1Sjk/Bcl2tm1Sjk involves: 129S2/SvPas * C57BL/6 MGI:2176718
cn3
Bcl2tm1Sjk/Bcl2tm1Sjk
Tg(Dct-lacZ)A12Jkn/0
involves: 129S2/SvPas * C57BL/6 * C57BL/6J * CBA MGI:6241340


Genotype
MGI:3692964
hm1
Allelic
Composition
Bcl2tm1Sjk/Bcl2tm1Sjk
Genetic
Background
B6;129S2-Bcl2tm1Sjk/J
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Bcl2tm1Sjk mutation (1 available); any Bcl2 mutation (41 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
muscle
• although soleus and tibialis anterior muscles show similar numbers of slow myofibers as in wild-type, the number of fast myofibers is only about 2/3 the number in wild-type




Genotype
MGI:2176718
hm2
Allelic
Composition
Bcl2tm1Sjk/Bcl2tm1Sjk
Genetic
Background
involves: 129S2/SvPas * C57BL/6
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Bcl2tm1Sjk mutation (1 available); any Bcl2 mutation (41 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
mortality/aging
• onset of morbidity has a wide range, from 10 days to 10 weeks, with some surviving longer and to at least 19 weeks of age
• the smallest mutants become noticeably ill and die after 1 week of age, however, the onset of morbidity has a wide range (10 days to 10 weeks), although there is a clustering at 2-3 weeks, just prior to weaning

embryo
• abundant TUNEL-positive apoptotic cells in E12 metanephroi, esp. within the mesenchymal regions

growth/size/body
• rounded snout
• grossly enlarged kidneys are cystic (J:15224)
• small kidneys show small cysts (J:15224)
• relatively few cysts at P7; however, marked cyst formation between P21 and p28 (J:34504)
• at P21, cystic kidneys exhibit nuclear localization of beta-catenin and loss of apical brush border actin staining; however, protein levels of alpha-catenin, beta-catenin, actin, and E-cadherin are not altered in cystic kidneys relative to non-cystic kidneys (J:53123)
• detected at 1 week and 8 months of age (J:22552)
• cortex cysts of both proximal tubule and cortical collecting duct origin at P28 (J:34504)
• cysts originating from the medullary thick ascending limb of Henle's loop and the medullary collecting ducts at P28
• develop polycystic kidney disease (J:15224)
• after P7, cysts develop at mutliple sites along the nephron (J:34504)
• decreased body size is first seen at 1 week of age and varies from mutant to mutant
• mutants that become visibly ill are often lethargic, anorectic, wasted, and at times tremulous
• growth rate slows after puberty
• exhibit immature facial features at 1 week of age
• kidneys are either grossly enlarged and cystic or small and pale

hearing/vestibular/ear

craniofacial
• rounded snout

immune system
• thymocytes show accelerated cell death following an apoptotic stimulates (dexamethasone and radiation) compared to wild-type
• exhibit involution of thymus with aging and illness
• increase in double negative CD4-CD8- thymocytes over time
• the percent of lymphocytes and absolute lymphocyte count are decreased in the peripheral blood of ill mutants (lymphopenia)
• exhibit a loss of peripheral B cells over time due to increased apoptosis
• exhibit a loss of peripheral T cells over time due to increased apoptosis
• loss of CD4+CD8+ double positive thymocytes over time
• total numbers of CD4+ single positive thymocytes decrease over time
• total numbers of CD8+ single positive thymocytes decrease over time
• exhibit massive cell death in lymphoid organs as mice age, especially the spleen and thymus, resulting in lymphoid organ involution
• exhibit widespread apoptosis in thymus as mutants age and become ill
• ill mutants exhibit a decrease in thymus size, with increased apoptosis in both cortex and medulla
• spleen undergoes massive apoptotic involution with age
• red pulp shows an increase in the proportion of erythroid relative to myeloid lineage cells
• ill mutants exhibit a decrease in spleen size
• loss of white pulp lymphoid areas with age and illness; many pyknotic and fragmented cells are noted in white pulp

renal/urinary system
• increased apoptosis of cells within cysts and in the renal interstitium at P28, as shown by TUNEL staining
• mice exhibit hyperproliferative glomerular epithelial and interstitial components with increasing age (J:15224)
• 87-fold increase in the number of BrdU-positive cells detected in the medulla at P28 (J:34504)
• 1.9-fold increase in the number of BrdU-positive cells detected in the cortex at P28 (J:34504)
• grossly enlarged kidneys are cystic (J:15224)
• small kidneys show small cysts (J:15224)
• relatively few cysts at P7; however, marked cyst formation between P21 and p28 (J:34504)
• at P21, cystic kidneys exhibit nuclear localization of beta-catenin and loss of apical brush border actin staining; however, protein levels of alpha-catenin, beta-catenin, actin, and E-cadherin are not altered in cystic kidneys relative to non-cystic kidneys (J:53123)
• detected at 1 week and 8 months of age (J:22552)
• cortex cysts of both proximal tubule and cortical collecting duct origin at P28 (J:34504)
• cysts originating from the medullary thick ascending limb of Henle's loop and the medullary collecting ducts at P28
• develop polycystic kidney disease (J:15224)
• after P7, cysts develop at mutliple sites along the nephron (J:34504)
• kidneys are either grossly enlarged and cystic or small and pale
• mice exhibit replacement of the normal flattened epithelium with a cuboidal proximal tubular epithelium and hyperplasia resulting in an immature epithelial crescent crowding the glomerulus, indicating tubular metaplasia of Bowman's epithelium
• mice exhibit hyperproliferative glomerular epithelial components with increasing age
• fewer glomeruli are observed in neonatal kidneys relative to controls
• after 3 days in organ culture, tubulogenesis within the metanephric blastema is significantly reduced
• however, induction of the metanephric blastema occurs in vivo, with no significant differences in the size of metanephroi obtained from E12 mutant and control embryos
• abundant TUNEL-positive apoptotic cells in E12 metanephroi, esp. within the mesenchymal regions
• in organ culture, lack of nephrogenic development is confirmed by staining for lectin D. biflorus which stains the ureteric bud
• after 3 days in organ culture, growth and development of E12 mutant metanephroi is visibly reduced
• the size of nephrogenic zone is significantly reduced in neonatal kidneys
• after P7, kidney growth, as reflected by increased size and weight, is significantly slowed relative to wild-type controls
• mitotic figures, not usually found in mature kidneys, are seen in the hyperplastic tubular epithelium
• mice exhibit hyperproliferative interstitial components with increasing age
• kidneys have an abnormally abnundant interstitium that contains many cells with pyknotic nuclei within nests of immature appearing cells
• by P21, unaffected glomeruli and non-cystic proximal tubules undergo compensatory growth
• kidneys are either small and pale or grossly enlarged and cystic (J:15224)
• decreased kidney size at 1 week of age (J:22552)
• neonatal kidneys are not cystic but several-fold smaller than heterozygous control kidneys (J:22552)
• approximately one-third of normal kidney weight at birth (P0)
• renal hypoplasia at P0 (J:34504)
• reduced nephron number at birth
• distal tubular ectasia (dilation) is apparent by 1 week after birth
• proximal tubular ectasia (dilation) is apparent by 1 week after birth
• small kidneys are pale
• severe renal insufficiency at 1-8 weeks of age, as shown by increased blood creatinine and BUN levels

homeostasis/metabolism
• increases with age (J:15224)
• increases with age (J:15224)

pigmentation
• hair turns gray with the second follicle cycle
• hypopigmentation often begins at the nose and proceeds caudally over 3-4 days
• hair shafts still demonstrate the differentially pigmented regions seen in wild-type, however they are markedly lightened throughout
• Fontana-Mason stain shows the presence of melanin in all hairs, suggesting a decrease in dark pigment rather than a loss of melanocytes

endocrine/exocrine glands
• exhibit widespread apoptosis in thymus as mutants age and become ill
• ill mutants exhibit a decrease in thymus size, with increased apoptosis in both cortex and medulla
• numerous aberrantly formed primordial follicles with a single flattened layer of granulosa cells and lacking oocytes
• normal primary, preantral, and antral follicles, containing normal oocytes
• exhibit involution of thymus with aging and illness

reproductive system
• loss of oocytes in aberrant primordial follicles
• numerous aberrantly formed primordial follicles with a single flattened layer of granulosa cells and lacking oocytes
• normal primary, preantral, and antral follicles, containing normal oocytes

hematopoietic system
• thymocytes show accelerated cell death following an apoptotic stimulates (dexamethasone and radiation) compared to wild-type
• exhibit widespread apoptosis in thymus as mutants age and become ill
• ill mutants exhibit a decrease in thymus size, with increased apoptosis in both cortex and medulla
• exhibit involution of thymus with aging and illness
• increase in double negative CD4-CD8- thymocytes over time
• the percent of lymphocytes and absolute lymphocyte count are decreased in the peripheral blood of ill mutants (lymphopenia)
• exhibit a loss of peripheral B cells over time due to increased apoptosis
• exhibit a loss of peripheral T cells over time due to increased apoptosis
• loss of CD4+CD8+ double positive thymocytes over time
• total numbers of CD4+ single positive thymocytes decrease over time
• total numbers of CD8+ single positive thymocytes decrease over time
• spleen undergoes massive apoptotic involution with age
• red pulp shows an increase in the proportion of erythroid relative to myeloid lineage cells
• ill mutants exhibit a decrease in spleen size
• loss of white pulp lymphoid areas with age and illness; many pyknotic and fragmented cells are noted in white pulp

cardiovascular system
• exhibit a decreased number of endothelial cells in the retinas
• exhibit a significant decrease in retinal vascular density compared to wild-type; retinal vasculature contains less cellularity and fewer capillary loops
• exhibit delayed development and remodeling of retinal vasculature and a significant decrease in the number of major arteries, which branch off from near the optic nerve, however hyaloid vessel regression is not affected
• degree and extent of secondary and tertiary branching is compromised in retinal vasculature
• exhibit increased apoptosis and increased proliferation in the developing retinal vasculature
• degree of ischemia-induced retinal neovascularization is reduced, however show a similar sensitivity to hyperoxia-mediated vessel obliteration
• exhibit a decreased number of pericytes in retinas

vision/eye
• exhibit a significant decrease in retinal vascular density compared to wild-type; retinal vasculature contains less cellularity and fewer capillary loops
• exhibit delayed development and remodeling of retinal vasculature and a significant decrease in the number of major arteries, which branch off from near the optic nerve, however hyaloid vessel regression is not affected
• degree and extent of secondary and tertiary branching is compromised in retinal vasculature
• exhibit increased apoptosis and increased proliferation in the developing retinal vasculature
• degree of ischemia-induced retinal neovascularization is reduced, however show a similar sensitivity to hyperoxia-mediated vessel obliteration

cellular
• loss of oocytes in aberrant primordial follicles
• at P21, cystic kidneys exhibit an altered distribution of beta-catenin and actin, suggesting that abnormal cell-cell adhesive interactions may contribute to cyst formation
• thymocytes show accelerated cell death following an apoptotic stimulates (dexamethasone and radiation) compared to wild-type
• abundant TUNEL-positive apoptotic cells in E12 metanephroi, esp. within the mesenchymal regions
• increased apoptosis of cells within cysts and in the renal interstitium at P28, as shown by TUNEL staining
• mice exhibit hyperproliferative glomerular epithelial and interstitial components with increasing age (J:15224)
• 87-fold increase in the number of BrdU-positive cells detected in the medulla at P28 (J:34504)
• 1.9-fold increase in the number of BrdU-positive cells detected in the cortex at P28 (J:34504)




Genotype
MGI:6241340
cn3
Allelic
Composition
Bcl2tm1Sjk/Bcl2tm1Sjk
Tg(Dct-lacZ)A12Jkn/0
Genetic
Background
involves: 129S2/SvPas * C57BL/6 * C57BL/6J * CBA
Find Mice Using the International Mouse Strain Resource (IMSR)
Mouse lines carrying:
Bcl2tm1Sjk mutation (1 available); any Bcl2 mutation (41 available)
Tg(Dct-lacZ)A12Jkn mutation (4 available)
phenotype observed in females
phenotype observed in males
N normal phenotype
embryo
• mice show complete loss of LacZ+ melanoblasts in the bulge area at the end stage of hair follicle morphogenesis (i.e. stage 8, but not stage 6), indicating apoptosis of bulge melanocyte stem cells; in contrast, pigmented melanocytes are still maintained in the bulb at stage 8
• mice treated with an anti-TGF-beta blocking antibody during the process of stem cell entry to the dormant state (stage 5-8) exhibit increased survival (rescue) of bulge LacZ+ melanoblasts at P4, P6, and P8, whereas untreated mice or mice treated with a control antibody display virtual loss of LacZ+ melanoblasts from the bulge area by P8

nervous system
• mice show complete loss of LacZ+ melanoblasts in the bulge area at the end stage of hair follicle morphogenesis (i.e. stage 8, but not stage 6), indicating apoptosis of bulge melanocyte stem cells; in contrast, pigmented melanocytes are still maintained in the bulb at stage 8
• mice treated with an anti-TGF-beta blocking antibody during the process of stem cell entry to the dormant state (stage 5-8) exhibit increased survival (rescue) of bulge LacZ+ melanoblasts at P4, P6, and P8, whereas untreated mice or mice treated with a control antibody display virtual loss of LacZ+ melanoblasts from the bulge area by P8





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last database update
04/16/2024
MGI 6.23
The Jackson Laboratory