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Neurokinin 3 receptor-expressing neurons in the median preoptic nucleus modulate heat-dissipation effectors in the female rat.
Mittelman-Smith M, Krajewski-Hall S, McMullen N, Rance N (2015) Neurokinin 3 receptor-expressing neurons in the median preoptic nucleus modulate heat-dissipation effectors in the female rat. Endocrinology 156:2552-2562. doi: 10.1210/en.2014-1974
Summary: Kisspeptin and Neurokinin B (NKB) expression in the infundibular, or arcuate, nucleus is increased after menopause. Here the authors investigate whether KNDy (kisspeptin, NKB, and dynorphin expressing) neurons are able to influence cutaneous vasodilation through Neurokinin 3 (NK3)-expressing projections from the median preoptic nucleus (MnPO). Rats received two 10-ng injections of NK3-SAP (Cat. #IT-63) into the MnPO. Blank-SAP (Cat. #IT-21) was used as a control. The data indicate that NK3-expressing neurons in the MnPO facilitate vasodilation.
Related Products: NKB-SAP (Cat. #IT-63), Blank-SAP (Cat. #IT-21)
Exploratory behavior and recognition memory in medial septal electrolytic, neuro- and immunotoxic lesioned rats.
Dashniani M, Burjanadze M, Naneishvili T, Chkhikvishvili N, Beselia G, Kruashvili L, Pochkhidze N, Chighladze M (2015) Exploratory behavior and recognition memory in medial septal electrolytic, neuro- and immunotoxic lesioned rats. Physiol Res 64:755-767. doi: 10.33549/physiolres.932809
Summary: To investigate recognition memory that incorporates a spatial or temporal component, the authors lesioned the medial septum of rats using several techniques. For specific lesioning of cholinergic neurons rats received bilateral injections of 192-IgG-SAP (Cat. #IT-01, 500 ng total) into the medial septum. Saporin (Cat. #PR-01) was used as a control. While electrolytic lesions produced disruptions of spatial recognition memory, immunotoxin lesions did not, indicating that the cholinergic neurons of the septohippocampal pathway are not essential to processing this type of learning.
Related Products: 192-IgG-SAP (Cat. #IT-01), Saporin (Cat. #PR-01)
Cortically projecting basal forebrain parvalbumin neurons regulate cortical gamma band oscillations.
Kim T, Thankachan S, McKenna J, McNally J, Yang C, Choi J, Chen L, Kocsis B, Deisseroth K, Strecker R, Basheer R, Brown R, McCarley R (2015) Cortically projecting basal forebrain parvalbumin neurons regulate cortical gamma band oscillations. Proc Natl Acad Sci U S A 112:3535-3540. doi: 10.1073/pnas.1413625112
Summary: Measurements of cortical EEG capture gamma band oscillations (GBO). Abnormalities in these GBO have been found in some neuropsychiatric disorders such as Alzheimer’s disease and schizophrenia. The authors analyzed GBO neuronal groups by administering 650-ng bilateral icv injections of mu p75-SAP (Cat. #IT-16) to mice to determine the role of basal forebrain cholinergic neurons in the generation of GBO. The results indicate GABAergic basal forebrain neurons containing parvalbumin were important for GBO integrity, but cholinergic neurons in the basal forebrain were not involved.
Related Products: mu p75-SAP (Cat. #IT-16)
Selective lesion of GABA-ergic neurons in the medial septum by GAT1-saporin impairs spatial learning in a water-maze.
Burjanadze M, Mataradze S, Rusadze K, Chkhikvishvili N, Dashniani M (2015) Selective lesion of GABA-ergic neurons in the medial septum by GAT1-saporin impairs spatial learning in a water-maze. Georgian Med News 240:59-64.
Summary: The authors investigated the role of GABAergic neurons in the medial septum on spatial learning using a Morris water maze test. Rats received bilateral injections totaling 162 ng of GAT-1-SAP (Cat. #IT-32) into the medial septum. Saporin (Cat. #PR-01) was used as a control. The lesioned animals displayed significant deficits during the water maze task, indicating that GABAergic neurons in the medial septum are intrinsic to organization of spatial map-driven behavior.
Related Products: GAT1-SAP (Cat. #IT-32), Saporin (Cat. #PR-01)
Activation of the mouse primary visual cortex by medial prefrontal subregion stimulation is not mediated by cholinergic basalo-cortical projections.
Nguyen H, Huppé-Gourgues F, Vaucher E (2015) Activation of the mouse primary visual cortex by medial prefrontal subregion stimulation is not mediated by cholinergic basalo-cortical projections. Front Syst Neurosci 9:1. doi: 10.3389/fnsys.2015.00001
Summary: Mice received 1 μg icv injections of mu p75-SAP (Cat. #IT-16) to eliminate NGFr-positive cells. The results indicate a link between the prelimbic and infralimbic cortices and the primary visual cortex.
Related Products: mu p75-SAP (Cat. #IT-16)
Effects of immunotoxic and electrolytic lesions of medial septal area on spatial short-term memory in rats.
Dashniani M, Kruashvili L, Rusadze K, Matatradze S, Beselia G (2015) Effects of immunotoxic and electrolytic lesions of medial septal area on spatial short-term memory in rats. Georgian Med News 239:98-103.
Summary: In this work the authors investigated how essential septohippocampal projections are in a spatial working memory model. Rats received bilateral injections of 192-IgG-SAP (Cat. #IT-01, 600 ng total) or GAT-1-SAP (Cat. #IT-32, 195 ng total) into the medial septum. Saporin (Cat. #PR-01) was used as a control.
Related Products: 192-IgG-SAP (Cat. #IT-01), GAT1-SAP (Cat. #IT-32), Saporin (Cat. #PR-01)
Mesenchymal stem cells recruit macrophages to alleviate experimental colitis through TGFβ1
Liu W, Zhang S, Gu S, Sang L, Dai C (2015) Mesenchymal stem cells recruit macrophages to alleviate experimental colitis through TGFβ1. Cell Physiol Biochem 35:858-865. doi: 10.1159/000369743
Usage: For in vivo depletion of macrophages, mice received i.v. injection of Mac-1-SAP 20 µg, twice per week.
Related Products: Mac-1-SAP mouse/human (Cat. #IT-06)
Targeted ablation of cholinergic interneurons in the dorsolateral striatum produces behavioral manifestations of Tourette syndrome.
Xu M, Kobets A, Du J, Lennington J, Li L, Banasr M, Duman R, Vaccarino F, DiLeone R, Pittenger C (2015) Targeted ablation of cholinergic interneurons in the dorsolateral striatum produces behavioral manifestations of Tourette syndrome. Proc Natl Acad Sci U S A 112:893-898. doi: 10.1073/pnas.1419533112
Summary: Postmortem studies of Tourette syndrome patients has revealed a reduction in the number of specific striatal interneurons. The authors explored the hypothesis that this neuronal deficit is enough to produce the symptoms of Tourette syndrome in mice. Animals received 90-ng injections of Anti-ChAT-SAP (Cat. #IT-42) into the striatum. Rabbit IgG-SAP (Cat. #IT-35) was used as a control. The data suggest that loss of the striatal interneurons is enough to produce some, but not all, of the symptoms caused by Tourette syndrome.
Related Products: Anti-ChAT-SAP (Cat. #IT-42), Rabbit IgG-SAP (Cat. #IT-35)
Intrathecal Injections and Dosage
Q: Our lab is getting ready to begin a project using one of your targeted toxins. We already did a preliminary experiment to try out the material, but we have a couple of questions before we start the larger project. First, do you have any protocols or references for injecting intrathecally?
A: Thank you for your inquiry. We appreciate the opportunity to get involved in projects before they begin. At Advanced Targeting Systems, we do not do any in vivo work, just in vitro, however we have collaborated with many fine laboratories that have good experience with intrathecal injections. If you search PubMed with the keywords ‘saporin’ and ‘intrathecal’ you will be able to view references that will give you good information on techniques and protocols. Prior to beginning your project you will want to submit your animal care guidelines to your IACUC committee. Turner et al. published an article that will be helpful regarding intrathecal injections. [1]
Q: The second question is in two parts: 1) how do we determine the appropriate dose, and 2) how do we know saporin is not killing indiscriminately at that dose?
A: You should always use a control when determining the appropriate dose. A basic premise of the ATS targeting technology is that if a control (saporin alone or a control conjugate) evokes a response, then the dose is too high. Whenever a new shipment of targeted toxin is received, the proper working dilution should be ascertained before beginning a project. The targeted toxin data sheet states:
“There may be lot-to-lot variation in material; working dilutions must be determined by end user. If this is a new lot, assess the proper working dilution before beginning a full experimental protocol.”
If you search on the ATS website for the species and route of administration you plan to use, you can look through the publication summaries and see the dose that was used for that particular study. That will give you a ballpark range in which to start your dose titration. Just keep in mind: if the control kills cells, the dose is too high.
References
Featured Article: Impairments in gait, posture and complex movement control in rats modeling the multi-system, cholinergic-dopaminergic losses in Parkinson’s Disease
Kucinski A (2015) Featured Article: Impairments in gait, posture and complex movement control in rats modeling the multi-system, cholinergic-dopaminergic losses in Parkinson’s Disease. Targeting Trends 16(1)
Related Products: 192-IgG-SAP (Cat. #IT-01), Anti-ChAT-SAP (Cat. #IT-42)
Read the featured article in Targeting Trends.
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