Product list: Cre/loxP tools in AAV vector(AAV-Cre), adenoviral vector(Ad-Cre) and lentiviral vector(Lv-Cre)
Cat No. | Pre-made Cre | Viral vector | Protomer | Promoter Tissue Specificity | Promoter Tissue
Specificity characteristics | Order |
---|---|---|---|---|---|---|
Ad-CMV-Cre |
Adenovirus |
CMV |
Total |
Total |
||
Ad-CMV-Cre-GFP |
Adenovirus |
CMV |
Total |
Total |
||
AAV9-CMV-Cre |
AAV
GeneMedi offer multiple serotypes of AAV-Cre loxP system for your option:
· AAV1-Cre
· AAV2-Cre
· AAV2 variant (Y444F)-Cre
· AAV2 variant (Y272F, Y444F, Y500F, Y730F)-Cre
· AAV2 variant (Y444F, Y730F, Y500F, Y272F, Y704F, Y252F)-Cre
· AAV2 variant(AAV2.7m8)-Cre
· AAV5-Cre
· AAV6-Cre
· AAV8-Cre
· AAV8-1m-Cre
· AAV8-2m-Cre
· AAV8 variant (Y733F, Y447F, Y275)-Cre
· AAV9-Cre
· AAV-Rh.10-Cre
· AAV-DJ-Cre
· AAV-DJ/8-Cre
· AAV-Retro (Retrograde)-Cre
· AAV9-PHP.B-Cre
· AAV9-PHP.A-Cre
· AAV9-PHP.eB-Cre
· AAV9-PHP.S-Cre |
CMV |
Total |
Total |
||
AAV9-CMV-Cre-ZsGreen |
AAV
GeneMedi offer multiple serotypes of AAV-Cre loxP system for your option:
· AAV1-Cre
· AAV2-Cre
· AAV2 variant (Y444F)-Cre
· AAV2 variant (Y272F, Y444F, Y500F, Y730F)-Cre
· AAV2 variant (Y444F, Y730F, Y500F, Y272F, Y704F, Y252F)-Cre
· AAV2 variant(AAV2.7m8)-Cre
· AAV5-Cre
· AAV6-Cre
· AAV8-Cre
· AAV8-1m-Cre
· AAV8-2m-Cre
· AAV8 variant (Y733F, Y447F, Y275)-Cre
· AAV9-Cre
· AAV-Rh.10-Cre
· AAV-DJ-Cre
· AAV-DJ/8-Cre
· AAV-Retro (Retrograde)-Cre
· AAV9-PHP.B-Cre
· AAV9-PHP.A-Cre
· AAV9-PHP.eB-Cre
· AAV9-PHP.S-Cre |
CMV |
Total |
Total |
||
AAV9-CAG-Cre |
AAV
GeneMedi offer multiple serotypes of AAV-Cre loxP system for your option:
· AAV1-Cre
· AAV2-Cre
· AAV2 variant (Y444F)-Cre
· AAV2 variant (Y272F, Y444F, Y500F, Y730F)-Cre
· AAV2 variant (Y444F, Y730F, Y500F, Y272F, Y704F, Y252F)-Cre
· AAV2 variant(AAV2.7m8)-Cre
· AAV5-Cre
· AAV6-Cre
· AAV8-Cre
· AAV8-1m-Cre
· AAV8-2m-Cre
· AAV8 variant (Y733F, Y447F, Y275)-Cre
· AAV9-Cre
· AAV-Rh.10-Cre
· AAV-DJ-Cre
· AAV-DJ/8-Cre
· AAV-Retro (Retrograde)-Cre
· AAV9-PHP.B-Cre
· AAV9-PHP.A-Cre
· AAV9-PHP.eB-Cre
· AAV9-PHP.S-Cre |
CAG |
Total |
Total |
||
AAV9-CAG-Cre-ZsGreen |
AAV
GeneMedi offer multiple serotypes of AAV-Cre loxP system for your option:
· AAV1-Cre
· AAV2-Cre
· AAV2 variant (Y444F)-Cre
· AAV2 variant (Y272F, Y444F, Y500F, Y730F)-Cre
· AAV2 variant (Y444F, Y730F, Y500F, Y272F, Y704F, Y252F)-Cre
· AAV2 variant(AAV2.7m8)-Cre
· AAV5-Cre
· AAV6-Cre
· AAV8-Cre
· AAV8-1m-Cre
· AAV8-2m-Cre
· AAV8 variant (Y733F, Y447F, Y275)-Cre
· AAV9-Cre
· AAV-Rh.10-Cre
· AAV-DJ-Cre
· AAV-DJ/8-Cre
· AAV-Retro (Retrograde)-Cre
· AAV9-PHP.B-Cre
· AAV9-PHP.A-Cre
· AAV9-PHP.eB-Cre
· AAV9-PHP.S-Cre |
CAG |
Total |
Total |
||
AAV9-Syn-Cre-EGFP |
AAV
GeneMedi offer multiple serotypes of AAV-Cre loxP system for your option:
· AAV1-Cre
· AAV2-Cre
· AAV2 variant (Y444F)-Cre
· AAV2 variant (Y272F, Y444F, Y500F, Y730F)-Cre
· AAV2 variant (Y444F, Y730F, Y500F, Y272F, Y704F, Y252F)-Cre
· AAV2 variant(AAV2.7m8)-Cre
· AAV5-Cre
· AAV6-Cre
· AAV8-Cre
· AAV8-1m-Cre
· AAV8-2m-Cre
· AAV8 variant (Y733F, Y447F, Y275)-Cre
· AAV9-Cre
· AAV-Rh.10-Cre
· AAV-DJ-Cre
· AAV-DJ/8-Cre
· AAV-Retro (Retrograde)-Cre
· AAV9-PHP.B-Cre
· AAV9-PHP.A-Cre
· AAV9-PHP.eB-Cre
· AAV9-PHP.S-Cre |
synapsin (SYN) |
Neuro |
Neuron-specific promoter |
||
AAV9-Syn-Cre |
AAV
GeneMedi offer multiple serotypes of AAV-Cre loxP system for your option:
· AAV1-Cre
· AAV2-Cre
· AAV2 variant (Y444F)-Cre
· AAV2 variant (Y272F, Y444F, Y500F, Y730F)-Cre
· AAV2 variant (Y444F, Y730F, Y500F, Y272F, Y704F, Y252F)-Cre
· AAV2 variant(AAV2.7m8)-Cre
· AAV5-Cre
· AAV6-Cre
· AAV8-Cre
· AAV8-1m-Cre
· AAV8-2m-Cre
· AAV8 variant (Y733F, Y447F, Y275)-Cre
· AAV9-Cre
· AAV-Rh.10-Cre
· AAV-DJ-Cre
· AAV-DJ/8-Cre
· AAV-Retro (Retrograde)-Cre
· AAV9-PHP.B-Cre
· AAV9-PHP.A-Cre
· AAV9-PHP.eB-Cre
· AAV9-PHP.S-Cre |
synapsin (SYN) |
Neuro |
Neuron-specific promoter |
||
AAV9-CaMKII-Cre-EGFP |
AAV
GeneMedi offer multiple serotypes of AAV-Cre loxP system for your option:
· AAV1-Cre
· AAV2-Cre
· AAV2 variant (Y444F)-Cre
· AAV2 variant (Y272F, Y444F, Y500F, Y730F)-Cre
· AAV2 variant (Y444F, Y730F, Y500F, Y272F, Y704F, Y252F)-Cre
· AAV2 variant(AAV2.7m8)-Cre
· AAV5-Cre
· AAV6-Cre
· AAV8-Cre
· AAV8-1m-Cre
· AAV8-2m-Cre
· AAV8 variant (Y733F, Y447F, Y275)-Cre
· AAV9-Cre
· AAV-Rh.10-Cre
· AAV-DJ-Cre
· AAV-DJ/8-Cre
· AAV-Retro (Retrograde)-Cre
· AAV9-PHP.B-Cre
· AAV9-PHP.A-Cre
· AAV9-PHP.eB-Cre
· AAV9-PHP.S-Cre |
CaMKII |
Neuro |
Forebrain glutamate neuron-specific promoter |
||
AAV9-CaMKII-Cre |
AAV
GeneMedi offer multiple serotypes of AAV-Cre loxP system for your option:
· AAV1-Cre
· AAV2-Cre
· AAV2 variant (Y444F)-Cre
· AAV2 variant (Y272F, Y444F, Y500F, Y730F)-Cre
· AAV2 variant (Y444F, Y730F, Y500F, Y272F, Y704F, Y252F)-Cre
· AAV2 variant(AAV2.7m8)-Cre
· AAV5-Cre
· AAV6-Cre
· AAV8-Cre
· AAV8-1m-Cre
· AAV8-2m-Cre
· AAV8 variant (Y733F, Y447F, Y275)-Cre
· AAV9-Cre
· AAV-Rh.10-Cre
· AAV-DJ-Cre
· AAV-DJ/8-Cre
· AAV-Retro (Retrograde)-Cre
· AAV9-PHP.B-Cre
· AAV9-PHP.A-Cre
· AAV9-PHP.eB-Cre
· AAV9-PHP.S-Cre |
CaMKII |
Neuro |
Forebrain glutamate neuron-specific promoter |
Abstract
Cre-loxP system is widely used in the field of biosciences, especially in the generation of genetically engineered mice (knockout or overexpression), enabling researchers to study the function of gene of interest (GOI). To date, numerous systems, derived from the basic Cre-loxP system, have been developed to precisely control gene expression at desired time or cells. Here, we briefly introduce Cre-loxP system, and give a summary about its applications, especially viral vectors-mediated Cre expression (such as AAV-Cre or Ad-Cre) for in vitro or in vivo studies.
Inducible-tissue specific Cre-loxP system for in vivo and in vitro study
a) Tissue-specific promoter driven Cre-loxP system for conditional knock-out (KO)
To achieve the conditional knock-out (KO) of gene of interest (GOI) in specific tissue or organ, cell-specific promoter/enhancer driven Cre lines are used to breed with GOI-loxP lines. Their offspring will get both cell-specific driven Cre and floxed DNA (GOI), resulting in tissue-specific GOI excision (Fig. 3). A great number of cell-specific promoters or enhancers have been developed, such as Lyz2 driven Cre specific in macrophage, and CD45 driven Cre specific in hematopoietic tissues. Some examples are listed in the following Table 1.
Tissue/organ | cell | Promoter/enhancer | Reference |
Cerebrum | Neuronal and glia cell precursors | Aldh1l1 | [12] |
Cerebrum | CaMIIα | [13] | |
GABAergic interneurons | Dlx1 | [14] | |
GABAergic neurons | Dlx5/6 | [15-17] | |
DRG | Gad2 | [18] | |
Astrocyte | GFAP | [19, 20] | |
CA3 pyramidal cells | Grik4 | [21] | |
Arcuate nucleus | Lepr | [22] | |
Neuronal and glia cell precursors | Nes | [23] | |
DRG neurons | nNOS | [18] | |
Retinal Müller glial cells | Pdgfrα | [24] | |
Myelinating cells | PLP1 | [25] | |
DRG neurons | Pv (Pvalb) | [18] | |
GABAergic neurons | Slc17a6 | [26] | |
GABAergic neurons | Sst, Vip | [17] | |
Cerebellum | Cerebellar Purkinje cells | Pcp2 | [27] |
Brain stem | Dopamine and serotonin neurons | Slc6a3 (DAT) | [28] |
Serotonin neurons | ePet (Fev) | [29] | |
Vagal sensory neurons | Npy2r | [30] | |
Spinal cord | Mechanosensory dorsal horn | Cdh3, Htr6 | [31] |
Skin | Basal layer of the epidermis | Krt5 | [32] |
Epidermis keratinocytes | Krt10 | [33] | |
Epidermal progenitors | Krt18 | [34] | |
Immune system | Macrophage | Lyz2 | [35] |
Dendritic cells | CD11c (Itgax) | [36] | |
Mast cells | CMA1 | [37] | |
T cells | CD2 | [38] | |
CD4 | [39] | ||
CD8a | [40] | ||
Foxp3 | [41] | ||
Lck | [42] | ||
OX40 | [43] | ||
B cells | CD19 | [44, 45] | |
Hematopoietic cells | CD15 | [46] | |
Musculoskeletal | Osteochondro progenitors | Twist2 (Dermol) | [47, 48] |
Prrx1 | [49] | ||
Osteoblasts | BGLOP | [50] | |
Osteocytes | Dmp1 | [51] | |
Osteoclasts | Ctsk | [52] | |
Cardiomyocytes | NKX2.5 | [53] | |
Muscle | ACTA1 (HSA) | [54] | |
Digestive system | Stomach | ATP4b | [55] |
Intestine | Car1 | [56] | |
Intestine | Vil1 | [57] | |
Liver | Alb | [58, 59] | |
PanCreas | Ghrl | [60] | |
Ins1 (MIP) | [61] | ||
Ins2 (RIP) | [62] | ||
Ptf1a | [63] | ||
Urogenital system | Bladder | Upk2 | [64] |
Kidney | Aqp2 | [65] | |
Gdnf | [66] | ||
Ggt1 | [67] | ||
Ovary | Gdf9 | [68] | |
Zp3 | [69] | ||
Testis | Amh | [70] | |
Hspa2 | [71] |
b) Inducible Cre-loxP system
One inducible system is tamoxifen-inducible Cre-loxP system (Fig. 4A). When ubiquitous or tissue-specific promoter driven Cre is fused with the estrogen receptor containing a mutated ligand binding domain (ER-LBD), which is normally bound by heat shock protein 90 (HSP90), Cre-ER-HSP90 complex would be prevented from entering the nucleus. Once bound by the hormone (such as estrogen) or synthetic analogs (such as tamoxifen, T, or 4-hydoxytamoxifen, 4-OHT), ER will be released from HSP90. This enables the nuclear translocation of Cre-ERT complex and the following interaction between Cre and loxP sites [8, 32].
Another inducible system is tetracycline inducible Cre-loxP system, also known as doxycycline (dox; a tetracycline derivative)-inducible Cre system. This system has two mode: tet-on (Fig. 4B) and tet-off (Fig. 4C), responsible for the activation and inactivation of Cre gene, respectively [72, 73]. There are three elements orchestrating to control Cre expression in this system: reverse tetracycline-controlled transactivator (rtTA), tetracycline-controlled transactivator (tTA) and tetracycline responsive element (TRE), also named as a tetracycline operon (TetO). In tet-on system, ubiquitous or tissue-specific promoter driven rtTA binds to dox to turn on the transcription of Cre gene (Fig. 4B). On the contrary, in tet-off system, tTA binds to dox to turn off the transcription of Cre gene (Fig. 4C).
So far, a huge number of Cre transgenic lines have been established to combine with GOI loxP lines to generate conditional knockout mice or cell lines at the desired period and tissues in vitro or in vivo. Given that it is time and labor consuming to use Cre transgenic mice lines, viral vectors are convenient and versatile tools for the expression of Cre in certain cells or tissues, such as adeno-associated viral (AAV) vectors, as well as cell lines, such as adenovirus (Ad).
Summary
The Cre-loxP system, especially inducible tissue-specific knockout and viral vector-mediated Cre expression, has been highly utilized in genetics and cell biology research. Nevertheless, it seems that Cre-loxP system will continue to be prevalent in current and future research studies. GeneMedi is proficient in viral vector development and offers kinds of viral vector-based Cre tools, we can provide the best services and products if required.
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