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Lesions of orexin neurons block conditioned place preference for sexual behavior in male rats.
Di Sebastiano AR, Wilson-Perez HE, Lehman MN, Coolen LM (2011) Lesions of orexin neurons block conditioned place preference for sexual behavior in male rats. Horm Behav 59(1):1-8. doi: 10.1016/j.yhbeh.2010.09.006
Summary: The neuropeptide orexin is important in the feedback mechanisms of food intake and drugs of abuse. This work investigates the role of orexin in sexual reward in male rats. Two 200 ng bilateral hypothalamic injections of orexin-SAP (Cat. #IT-20) were made into each hemisphere. Blank-SAP (Cat. #IT-21) was used as a control. Although it was shown orexin neurons are activated by sexual reward cures, the data suggest that orexin is not essential for sexual performance and motivation.
Related Products: Orexin-B-SAP (Cat. #IT-20), Blank-SAP (Cat. #IT-21)
NK-1-receptor-mediated lesion of spinal post-synaptic dorsal column neurons might improve intractable visceral pain of cancer origin.
Wang Y, Mu X, Liu Y, Zhang X, Wu A, Yue Y (2011) NK-1-receptor-mediated lesion of spinal post-synaptic dorsal column neurons might improve intractable visceral pain of cancer origin. Med Hypotheses 76(1):102-104. doi: 10.1016/j.mehy.2010.08.042
Summary: There is evidence that spinal post-synaptic dorsal column neurons begin to express neurokinin-1 receptors after visceral stimulation. The authors discuss using this expression profile to target SSP-SAP (Cat. #IT-11) to these neurons and eliminate them. This use of ‘molecular neurosurgery’ may be a replacement for traditional neurosurgery for the treatment of cancer-related visceral pain.
Related Products: SSP-SAP (Cat. #IT-11)
A new oxytocin-saporin cytotoxin for lesioning oxytocin-receptive neurons in the rat hindbrain.
Baskin DG, Kim F, Gelling RW, Russell BJ, Schwartz MW, Morton GJ, Simhan HN, Moralejo DH, Blevins JE (2010) A new oxytocin-saporin cytotoxin for lesioning oxytocin-receptive neurons in the rat hindbrain. Endocrinology 151(9):4207-4213. doi: 10.1210/en.2010-0295
Summary: There is evidence to suggest that release of oxytocin in the nucleus tractus solitarius (NTS) of the hindbrain can inhibit food intake by augmenting the cholecystokinin satiety response. In order to add support to this hypothesis the authors used oxytocin-SAP (Cat. #IT-46) to eliminate oxytocin receptive cells in the NTS. Blank-SAP (Cat. #IT-21) was used as a control. 0.5 µl-injections of oxytocin-SAP into the NTS caused reduced satiation effect of CCK-8 and blocked the stimulation of food intake by an oxytocin receptor antagonist.
Related Products: Oxytocin-SAP (Cat. #IT-46), Blank-SAP (Cat. #IT-21)
Saporin toxin-conjugated monoclonal antibody targeting prostate-specific membrane antigen has potent anticancer activity.
Kuroda K, Liu H, Kim S, Guo M, Navarro V, Bander NH (2010) Saporin toxin-conjugated monoclonal antibody targeting prostate-specific membrane antigen has potent anticancer activity. Prostate 70(12):1286-1294. doi: 10.1002/pros.21164
Summary: Current treatments for prostate cancer are only moderately effective. In this work the authors examined the cytotoxic efficacy of an anti-prostate-specific membrane antigen (PMSA) antibody conjugated to saporin on PMSA-positive cell lines. hJ591, a humanized anti-PMSA antibody, was biotinylated and combined with streptavidin-ZAP (Cat. #IT-27). The hJ591-streptavidin-ZAP complex was specifically cytotoxic to PMSA-positive cell lines, and had anti-cancer activity in a xenograft model. This work demonstrates the anti-cancer potential of targeting PMSA.
Related Products: Streptavidin-ZAP (Cat. #IT-27)
Hyperalgesic priming is restricted to isolectin B4-positive nociceptors.
Joseph EK, Levine JD (2010) Hyperalgesic priming is restricted to isolectin B4-positive nociceptors. Neuroscience 169(1):431-435. doi: 10.1016/j.neuroscience.2010.04.082
Summary: Hyperalgesic priming is an injury that induces a chronic pain state marked by the presence of inflammatory cytokines. The authors evaluated which populations of nociceptors are involved in the priming process. Rats that received 3.2 µg intrathecal injections of IB4-SAP (Cat. #IT-10) failed to establish priming. Acute mechanical hyperalgesia could still be induced, indicating that IB4+ nociceptors are necessary for priming, but a different nociceptor group is involved with nociceptor sensitization.
Related Products: IB4-SAP (Cat. #IT-10)
Noradrenergic nuclei that receive sensory input during mating and project to the ventromedial hypothalamus play a role in mating-induced pseudopregnancy in the female rat.
Northrop LE, Polston EK, Erskine MS (2010) Noradrenergic nuclei that receive sensory input during mating and project to the ventromedial hypothalamus play a role in mating-induced pseudopregnancy in the female rat. J Neuroendocrinol 22(10):1061-1071. doi: 10.1111/j.1365-2826.2010.02049.x
Summary: Maintenance of pregnancy or pseudopregnancy in rats is maintained by bicircadian prolactin surges induced by vaginal-cervical stimulation. In order to test the hypothesis that medullary noradrenergic cell groups are involved in this process the authors infused rats with either 2 ng or 60 ng anti-DBH-SAP (Cat. #IT-03) into the ventrolateral division of the ventromedial hypothalamus (VMHv1) and the posterodorsal medial amygdala. Mouse IgG-Sap (Cat. #IT-18) was used as a control. The data confirm that noradrenergic neurons are involved in the maintenance of pregnancy or pseudopregnancy.
Related Products: Anti-DBH-SAP (Cat. #IT-03), Mouse IgG-SAP (Cat. #IT-18)
Decrease in membrane phospholipid unsaturation induces unfolded protein response.
Ariyama H, Kono N, Matsuda S, Inoue T, Arai H (2010) Decrease in membrane phospholipid unsaturation induces unfolded protein response. J Biol Chem 285(29):22027-22035. doi: 10.1074/jbc.M110.126870 PMID: 20489212
Summary: Properties of the cell membrane can be influenced by the degree of fatty acid unsaturation in membrane phospholipids. Alteration of this unsaturation has been implicated in many disease states. Using an anti-SCD1 antibody (Cat. #AB-259) to visualize SCD-1 levels by western blot, the authors determined that there are several genetic factors that affect the level of saturated fatty acid in systems modulating insulin resistance, type 2 diabetes, and cardiovascular disease.
Related Products: SCD-1 Mouse Monoclonal (Cat. #AB-259)
Central sensitization in the trigeminal nucleus caudalis produced by a conjugate of substance P and the A subunit of cholera toxin.
Caudle R, King C, Nolan T, Suckow S, Vierck C, Neubert J (2010) Central sensitization in the trigeminal nucleus caudalis produced by a conjugate of substance P and the A subunit of cholera toxin. J Pain 11:838-846. doi: 10.1016/j.jpain.2010.05.007
Objective: To understand central sensitization.
Summary: Findings suggest that central sensitization leads to activation of an endogenous opioid system. Intracisternal administration of SP-CTA is a useful model for studying central sensitization as a disease process without having to induce a peripheral injury.
Usage: SP-CTA was diluted in PBS and injected in a volume of 10 μl (rats) or 1 μl (mice) over the course of three minutes.
Related Products: SP-CTA (Cat. #IT-39)
Septohippocampal pathways contribute to system consolidation of a spatial memory: Sequential implication of gabaergic and cholinergic neurons.
Lecourtier L, de Vasconcelos AP, Leroux E, Cosquer B, Geiger K, Lithfous S, Cassel JC (2011) Septohippocampal pathways contribute to system consolidation of a spatial memory: Sequential implication of gabaergic and cholinergic neurons. Hippocampus 21(12):1277-1289. doi: 10.1002/hipo.20837
Summary: Few studies have examined the role of GABAergic septohippocampal projections in memory consolidation. The authors administered 192-IgG-SAP (400 ng; Cat. #IT-01) and/or orexin-SAP (70 ng; Cat. #IT-20) to the medial septum/vertical limb of the diagonal band of Broca of rats. Spatial memory tests were then administered over several weeks. The data indicate that both GABAergic and cholinergic septohippocampal systems contribute to memory stabilization, possibly in a sequential manner.
Related Products: 192-IgG-SAP (Cat. #IT-01), Orexin-B-SAP (Cat. #IT-20)
Featured Article: Role of cell fate determinants in a model of spinal cord neurotoxic lesion induced by cholera toxin b-saporin
Gulino R, Perciavalle V, Gulisan M (2010) Featured Article: Role of cell fate determinants in a model of spinal cord neurotoxic lesion induced by cholera toxin b-saporin. Targeting Trends 11(3)
Related Products: CTB-SAP (Cat. #IT-14)
Read the featured article in Targeting Trends.
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