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Cellular basis of itch sensation.
Sun YG, Zhao ZQ, Meng XL, Yin J, Liu XY, Chen ZF (2009) Cellular basis of itch sensation. Science 325:1531-1534. doi: 10.1126/science.1174868
Summary: Whether itch and pain use separate neuronal pathways has long been a subject of debate. The authors injected 400 ng of bombesin-SAP (Cat. #IT-40) into the intrathecal space of mice and examined itch and pain behavior. Lesioned mice had dramatic deficits in all itch behavior tested regardless of the histamine dependence of the itch. All pain behaviors, however, were left intact. These data indicate that the gastrin-releasing peptide receptor-expressing neurons are essential for itch transmission.
Related Products: Bombesin-SAP (Cat. #IT-40)
cGMP-dependent protein kinase Ialpha associates with the antidepressant-sensitive serotonin transporter and dictates rapid modulation of serotonin uptake.
Steiner J, Carneiro A, Wright J, Matthies H, Prasad H, Nicki C, Dostmann W, Buchanan C, Corbin J, Francis S, Blakely R (2009) cGMP-dependent protein kinase Ialpha associates with the antidepressant-sensitive serotonin transporter and dictates rapid modulation of serotonin uptake. Mol Brain 2:26. doi: 10.1186/1756-6606-2-26 PMID: 19656393
Summary: The neurotransmitter serotonin fulfills an important modulatory role in a wide range of brain functions including mood, appetite, sexual behavior, and reward. Serotonin transporters (SERT) are involved in the inactivation of synaptic serotonin, as well as serotonin recycling, which is critical to the maintenance of neuronal serotonin stores. In this work the authors examined how neuronal A3 adenosine receptor activation can enhance presynaptic serotonin transport in vitro as well as SERT-mediated clearance in vivo. The in vitro experiments included immunohistochemistry with anti-SERT (Cat. #AB-N40) on RN46A cells at a 1:500 dilution.
Related Products: SERT Mouse Monoclonal (Cat. #AB-N40)
Cell transplantation: a future therapy for narcolepsy?
Arias-Carrion O, Murillo-Rodriguez E (2009) Cell transplantation: a future therapy for narcolepsy?. CNS Neurol Disord Drug Targets 8:309-314. doi: 10.2174/187152709788921681
Summary: This review covers the current understanding of narcolepsy and discusses the potential for transplants as a therapeutic treatment. Animal models are summarized, including the use of orexin-SAP (Cat. #IT-20) in rats. The review goes on to suggest that production of orexigenic neuroblasts from stem cells may be a useful therapy.
Related Products: Orexin-B-SAP (Cat. #IT-20)
Ketamine-induced deficit of auditory gating in the hippocampus of rats is alleviated by medial septal inactivation and antipsychotic drugs.
Ma J, Tai SK, Leung LS (2009) Ketamine-induced deficit of auditory gating in the hippocampus of rats is alleviated by medial septal inactivation and antipsychotic drugs. Psychopharmacology (Berl) 206:457-467. doi: 10.1007/s00213-009-1623-3
Summary: Schizophrenic patients do not experience the usual diminished response to repeated stimuli, otherwise known as gating. Gating loss can be caused by the administration of some psychotomimetic drugs. This study used 170 ng injections of 192-IgG-SAP (Cat. #IT-01) to examine the effect of ketamine on sensory gating loss. Elimination of septohippocampal cholinergic neurons alleviated the disruption of auditory gating caused by ketamine.
Related Products: 192-IgG-SAP (Cat. #IT-01)
Neuroprotective effect of testosterone treatment on motoneuron recruitment following the death of nearby motoneurons.
Fargo KN, Foster AM, Sengelaub DR (2009) Neuroprotective effect of testosterone treatment on motoneuron recruitment following the death of nearby motoneurons. Dev Neurobiol 69:825-835. doi: 10.1002/dneu.20743
Summary: Previous work has demonstrated that testosterone treatment can prevent dendritic atrophy due to death of nearby motoneurons. This experiment examined whether this protection extends to motor activation. Rats received a 1 µg injection of CTB-SAP (Cat. #IT-14) into each of the right bulbocavernosus and levator ani muscles. Animals treated with testosterone preserved more of the activity duration than untreated animals, as well as no decrease in motoneuron recruitment.
Related Products: CTB-SAP (Cat. #IT-14)
Basal cells as stem cells of the mouse trachea and human airway epithelium
Rock JR, Onaitis MW, Rawlins EL, Lu Y, Clark CP, Xue Y, Randell SH, Hogan BL (2009) Basal cells as stem cells of the mouse trachea and human airway epithelium. Proc Natl Acad Sci U S A 106(31):12771-12775. doi: 10.1073/pnas.0906850106 PMID: 19625615
Related Products: NGFr (mu p75) Rabbit Polyclonal (Cat. #AB-N01)
An anti-CD103 immunotoxin promotes long-term survival of pancreatic islet allografts.
Zhang L, Moffatt-Bruce SD, Gaughan AA, Wang JJ, Rajab A, Hadley GA (2009) An anti-CD103 immunotoxin promotes long-term survival of pancreatic islet allografts. Am J Transplant 9:2012-2023. doi: 10.1111/j.1600-6143.2009.02735.x PMID: 19645708
Objective: To determine whether blockade of the CD103 pathway represents a viable therapeutic strategy for intervention in organ allograft rejection and graft-vs-host disease.
Summary: These data document that depletion of CD103 expressing cells represents a viable strategy for therapeutic intervention in allograft rejection.
Usage: Recipient C57BL/6 mice received 2.0 mg/kg M290-SAP or Rat IgG-SAP on day 3 post-transplantation.
Related Products: Anti-CD103-SAP (Cat. #IT-50), Rat IgG-SAP (Cat. #IT-17)
Medullary circuitry regulating rapid eye movement sleep and motor atonia.
Vetrivelan R, Fuller PM, Tong Q, Lu J (2009) Medullary circuitry regulating rapid eye movement sleep and motor atonia. J Neurosci 29:9361-9369. doi: 10.1523/JNEUROSCI.0737-09.2009
Summary: Data concerning rapid-eye movement (REM) motor atonia in rats has not agreed with results seen in large amount of data from cats. Here the authors traced the medullary networks in rats involved with this REM function. 120-300 ng injections of orexin-SAP (Cat. #IT-20) were administered to 6 different sites in the medulla. Ablation of orexin receptor-expressing neurons in one site in the ventromedial medulla resulted in intermittent loss of muscle atonia, indicating that glutaminergic neurons in this area are key components of the REM atonia circuit.
Related Products: Orexin-B-SAP (Cat. #IT-20)
Hypocretin-2 saporin lesions of the ventrolateral periaquaductal gray (vlPAG) increase REM sleep in hypocretin knockout mice.
Kaur S, Thankachan S, Begum S, Liu M, Blanco-Centurion C, Shiromani PJ (2009) Hypocretin-2 saporin lesions of the ventrolateral periaquaductal gray (vlPAG) increase REM sleep in hypocretin knockout mice. PLoS One 4:e6346. doi: 10.1371/journal.pone.0006346
Summary: Not all connections between narcolepsy and orexin are understood, since orexin neurons are located in the lateral hypothalamus and some sleep functions are controlled by the brainstem. This experiment used 16.5 ng injections of orexin-SAP (Cat. #IT-20) into each side of the ventrolateral periaqueductal gray (v/PAG to) examine these connections. The results indicate that loss of orexin neurons in the v/PAG results in loss of inhibitory control over REM sleep, but does not cause cataplexy.
Related Products: Orexin-B-SAP (Cat. #IT-20)
Featured Article: Depletion of microglia by Mac-1-SAP in mouse hippocampal slice cultures enhances ischemia-like neurodegeneration
Montero M, Gonzalez B, Zimmer J (2009) Featured Article: Depletion of microglia by Mac-1-SAP in mouse hippocampal slice cultures enhances ischemia-like neurodegeneration. Targeting Trends 10(3)
Related Products: Mac-1-SAP mouse/human (Cat. #IT-06)
Read the featured article in Targeting Trends.
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