targeted-toxins

Fu R, Han C-F, Ni T, Di L, Liu L-J, Lv W-C, Bi Y-R, Jiang N, He Y, Li H-M, Wang S, Xie H, Chen B-A, Wang X-S, Weiss SJ, Lu T, Guo Q-L, Wu Z-Q (2019) A ZEB1/p53 signaling axis in stromal fibroblasts promotes mammary epithelial tumours. Nat Commun 10(1):3210. doi: 10.1038/s41467-019-11278-7 PMID: 31324807

Usage: immunohistochemistry (1:100)

Related Products: Fibroblast Growth Factor Rabbit Polyclonal, mammalian (Cat. #AB-07)

Acton D, Ren X, DiCostanzo S, Dalet A, Bourane S, Bertocchi I, Eva C, Goulding M (2019) Spinal neuropeptide Y1 receptor-expressing neurons form an essential excitatory pathway for mechanical itch. Cell Reports 28(3):625-639.e6 . doi: 10.1016/j.celrep.2019.06.033

Objective: To determine the central pathway for mechanical itch.

Summary: NPY-Y1 signaling regulates the transmission of innocuous tactile information by establishing biologically relevant thresholds for touch discrimination and mechanical itch reflexes. Neither the evoked nor spontaneous scratching seen following activation of Y1Cre neurons was affected by ablation of the GRPR+ neurons. NK1R+ neuron ablation failed to modulate mechanically evoked itch.

Usage: P28 mice were given a single intrathecal (i.t.) injection of either Bombesin-SAP (400 ng in 5 mL 0.9% sterile saline) to ablate GRPR+ cells or SSP-SAP to ablate NK1r+ neurons (100 ng in 5 mL 0.9% sterile saline). Littermate controls received Blank-SAP (equal mass in 5 mL 0.9% sterile saline).

Related Products: Bombesin-SAP (Cat. #IT-40), SSP-SAP (Cat. #IT-11), Blank-SAP (Cat. #IT-21)

Chew C, Sengelaub DR (2019) Neuroprotective effects of exercise on the morphology of somatic motoneurons following the death of neighboring motoneurons. Neurorehabil Neural Repair 33(8):656-667. doi: 10.1177/1545968319860485

Objective: To explore whether exercise shows the same neuroprotective effect on induced dendritic atrophy as that seen with androgen treatment.

Summary: Exercise following neural injury exerts a protective effect on motoneuron dendrites comparable to that seen with exogenous androgen treatment.

Usage: Motoneurons innervating the left vastus medialis muscle were selectively killed by intramuscular injection of CTB-SAP (2 μL, 0.1%). Saporin injection reduced the weight of the vastus medialis muscle; exercise had no effect on muscle weight.

Related Products: CTB-SAP (Cat. #IT-14)

Nizari S, Carare RO, Romero IA, Hawkes CA (2019) 3D reconstruction of the neurovascular unit reveals differential loss of cholinergic innervation in the cortex and hippocampus of the adult mouse brain. Front Aging Neurosci 11:172. doi: 10.3389/fnagi.2019.00172

Objective: To further characterize the effect of the loss of cholinergic innervation on the NVU (neurovascular unit) in Alzheimer’s Disease.

Summary: Significantly less ChAT staining was detected in the medial septum of saporin-treated mice at 45 days post-surgery. This was accompanied by a significant decrease in cholinergic nerve fiber density in the hippocampus and the cortex. As expected, p75 NTR-negative neurons in the striatum were not affected by mu p75-SAP treatment.

Usage: In this study, the mu-p75-SAP was used to induce death of basal forebrain cholinergic neurons and their fiber projections. mu p75-SAP 0.5 µL (0.596 µg/µL) or 0.9% saline (n = 19) was injected into each ventricle.

Related Products: mu p75-SAP (Cat. #IT-16)

Hernández-Melesio MA, Alcaraz-Zubeldia M, Jiménez-Capdeville ME, Martínez-Lazcano JC, Santoyo-Pérez ME, Quevedo-Corona L, Gerónimo-Olvera C, Sánchez-Mendoza A, Ríos C, Pérez-Severiano F (2019) Nitric oxide donor molsidomine promotes retrieval of object recognition memory in a model of cognitive deficit induced by 192 IgG-saporin. Behav Brain Res 366:108-117. doi: 10.1016/j.bbr.2019.03.031

Objective: To analyze the potential of a NO donor (molsidomine, MOLS) to prevent the recognition memory deficits resulting from the septal cholinergic denervation by 192-IgG-SAP in rats.

Summary: Results showed that 192-IgG-SAP reduced the immunoreactivity of cholinergic septal neurons (41%), compared with PBS-receiving control rats (p < 0.05).

Usage: The injection reached the medial septum (MS) structure with 192-IgG-SAP diluted in PBS solution (0.22 μg in 1μl) or PBS as control, both at 0.25 μl/min, allowing diffusion for 3 min, AP+0.6, L 0.0, V−7.0 from Bregma.

Related Products: 192-IgG-SAP (Cat. #IT-01)

Weiner GA, Shah SH, Angelopoulos CM, Bartakova AB, Pulido RS, Murphy A, Nudleman E, Daneman R, Goldberg JL (2019) Cholinergic neural activity directs retinal layer-specific angiogenesis and blood retinal barrier formation. Nat Commun 10(1):2477. doi: 10.1038/s41467-019-10219-8

Objective: To determine which neurons are responsible for angiogenesis and blood retinal barrier formation.

Summary: Anti-ChAT-SAP reduces SAC (starburst amacrine cell) number and inhibits deep-layer angiogenesis.

Usage: Anti-ChAT-SAP or control Rabbit-IgG-SAP were injected intravitreally at P3 and P11 (0.12 mg/mL in PBS).

Related Products: Anti-ChAT-SAP (Cat. #IT-42), Rabbit IgG-SAP (Cat. #IT-35)

Liang YJ, Feng SY, Qi YP, Li K, Jin ZR, Jing HB, Liu LY, Cai J, Xing GG, Fu KY. (2019) Contribution of microglial reaction to increased nociceptive responses in high-fat-diet (HFD)-induced obesity in male mice. Brain Behav Immun 80:777-792. doi: 10.1016/j.bbi.2019.05.026

Related Products: Mac-1-SAP mouse/human (Cat. #IT-06)

Bernabe C, Caliman I, de Abreu A, Dustrude E, Molosh A, Shekhar A, Johnson P (2019) S38. Dissecting the functional heterogeneity of serotonergic systems that regulate fear and panic. Biol Psychiatry 85(10):S311. doi: 10.1016/j.biopsych.2019.03.789

Objective: To elucidate the role of these serotonergic networks on learned fear and innate panic responses.

Summary: LED excitation or lesioning of PeF projecting 5-HT system respectively attenuated and enhanced panic-associated escape/flight behaviors and cardioexcitation following a 7.5 and 20% CO2 challenge.

Usage: Anti-SERT-SAP was injected into the BLA or PeF to lesion these 5-HT pathways.

Related Products: Anti-SERT-SAP (Cat. #IT-23)

Nelson TS, Fu W, Donahue RR, Corder GF, Hökfelt T, Wiley RG, Taylor BK (2019) Facilitation of neuropathic pain by the NPY Y1 receptor-expressing subpopulation of excitatory interneurons in the dorsal horn. Sci Rep 9(1):7248. doi: 10.1038/s41598-019-43493-z PMID: 31076578

Objective: To test the relevance of the NPYY1 spinal population to the development and/or maintenance of acute and neuropathic pain.

Summary: This neuroanatomical and behavioral characterization of Y1R-expressing excitatory interneurons provides compelling evidence for the development of spinally-directed  Y1R agonists to reduce chronic neuropathic pain.

Usage: Selectively ablated Y1R-expressing interneurons while sparing the central terminals of primary afferents. Rats received intrathecal injections of either NPY-SAP or control Blank-SAP (1000 ng each).

Related Products: NPY-SAP (Cat. #IT-28), Blank-SAP (Cat. #IT-21)

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Fatima M, Ren X, Pan H, Slade HFE, Asmar AJ, Xiong CM, Shi A, Xiong AE, Wang L, Duan B (2019) Spinal somatostatin-positive interneurons transmit chemical itch. Pain 160(5):1166-1174. doi: 10.1097/j.pain.0000000000001499

Objective: To further study the cellular identity of spinal interneurons that contribute to itch processing.

Summary: Findings reveal a novel spinal mechanism for sensory encoding of itch perception.

Usage: Npra receptor–expressing spinal cord interneurons were ablated through intrathecal injection of Nppb-SAP (5 μg/10 μL) or control Blank-SAP in lumbar segment 3 to 4. Behavioral analyses were performed 1 week after the toxin injection.

Related Products: Nppb-SAP (Cat. #IT-69), Blank-SAP (Cat. #IT-21)