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Forebrain cholinergic plasticity in rats with chronic epilepsy induced by status epilepticus
da Costa C, Soares JI, Lukoyanov NV (2021) Forebrain cholinergic plasticity in rats with chronic epilepsy induced by status epilepticus. . 14th U.PORTO Young Researchers Meeting
Summary: This poster had the following aims: 1) Evaluate the GABAergic population in the MS/DB in a chronic epilepsy model of kainic acid (KA)-treated rats. 2) Assess the GABAergic and cholinergic interconnectivity in the MS/DB in a chronic epilepsy model of kainic acid (KA)-treated rats. Results showed that outcomes were improved in rats receiving 192-IgG-SAP treatment as compared to Sham. Mortality: Sham – 50%; SAP – 0%.Recurrent motor seizures: Sham – 83%; SAP – 40%. Recurrent motor + EEG seizures: Sham – 100%; SAP – 50%.
Usage: 192-IgG-SAP was used to produce a moderate, but significant loss of septohippocampal cholinergic cells and to suppress their plasticity.
Related Products: 192-IgG-SAP (Cat. #IT-01)
Cholinergic regulation of adult hippocampal neurogenesis and hippocampus-dependent functions
Madrid LI, Jimenez-Martin J, Coulson EJ, Jhaveri DJ (2021) Cholinergic regulation of adult hippocampal neurogenesis and hippocampus-dependent functions. Int J Biochem Cell Biol 134:105969. doi: 10.1016/j.biocel.2021.105969
Summary: In this review, the authors appraise the evidence linking the contribution of cholinergic signalling to the regulation of adult hippocampal neurogenesis and hippocampus-dependent functions.
Usage: A hallmark feature of all basal forebrain cholinergic neurons is the expression of high levels of the p75 neurotrophin receptor which can be precisely targeted using 192-IgG-SAP. Administration of 192-IgG-SAP (icv, 2.5 µg, Mohapel et al., 2005) resulted in significant impairment in adult hippocampal neurogenesis in rats. In contrast, a study which lesioned MS cholinergic neurons in mice reported no effect on baseline proliferation in the hippocampus. Mice received 3.6 µg of mu p75-SAP into each lateral ventricle (Ho et al., 2009). Although the number of surviving neurons was similar in both lesioned and control animals, most of the progenitor cells in the lesioned animals could not survive without cholinergic input.
Related Products: 192-IgG-SAP (Cat. #IT-01), mu p75-SAP (Cat. #IT-16)
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Placenta: A gold mine for translational research and regenerative medicine
Pethe P, Kale V (2021) Placenta: A gold mine for translational research and regenerative medicine. Reprod Biol 21(2):100508. doi: 10.1016/j.repbio.2021.100508
Objective: To review recent studies regarding the therapeutic potential of human placenta-derived mesenchymal stromal/stem cells (hPMSCs) and their extracellular vesicles (EVs).
Summary: These studies demonstrate salutary effects of hPMSC-EVs on a range of different difficult-to-treat conditions like Duchenne Muscular Dystrophy, Parkinson’s disease, acute kidney injury, etc., and therefore, it is imperative that these leads should be taken forward to clinical trials.
Usage: 8 µL of 192 IgG-saporin (0.63 µg/µL) were bilaterally injected into the ventricle to induce a dementia rat model.
Related Products: 192-IgG-SAP (Cat. #IT-01)
Cholinergic signaling, neural excitability, and epilepsy
Wang Y, Tan B, Wang Y, Chen Z (2021) Cholinergic signaling, neural excitability, and epilepsy. Molecules 26(8):2258. doi: 10.3390/molecules26082258
Summary: In this review, the authors briefly describe the distribution of cholinergic neurons, muscarinic, and nicotinic receptors in the central nervous system and their relationship with neural excitability and epilepsy. intraventricular administration of 192-IgG-SAP, which inhibits cholinergic projection to the hippocampus and cortex respectively, facilitates seizure induced by amygdala kindling
Usage: Ferencz et al. used 192-IgG-SAP (2.5 μg icv) to investigate the effect of eliminating cholinergic projections to the hippocampal formation and cerebral cortex on the induction of epilepsy through electrical stimulation of the rat brain. They determined that the loss of specific projections to the amygdala accelerates development of seizures.
Related Products: 192-IgG-SAP (Cat. #IT-01)
Medial parabrachial nucleus is essential in controlling wakefulness in rats
Xu Q, Wang DR, Dong H, Chen L, Lu J, Lazarus M, Cherasse Y, Chen GH, Qu WM, Huang ZL (2021) Medial parabrachial nucleus is essential in controlling wakefulness in rats. Front Neurosci 15:645877. doi: 10.3389/fnins.2021.645877
Summary: Lesions of the LC with 192-IgG-SAP have no significant effect on wakefulness in rats (Blanco-Centurion et al.). Only the Orexin-SAP lesion involved in the MPB region resulted in the dramatic decrease of wakefulness in rats (Fuller et al.).
Related Products: 192-IgG-SAP (Cat. #IT-01), Orexin-B-SAP (Cat. #IT-20)
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Preferential neuronal responses to snakes in the monkey medial prefrontal cortex support an evolutionary origin for ophidiophobia
Dinh HT, Nishimaru H, Le QV, Matsumoto J, Setogawa T, Maior RS, Tomaz C, Ono T, Nishijo H (2021) Preferential neuronal responses to snakes in the monkey medial prefrontal cortex support an evolutionary origin for ophidiophobia. Front Behav Neurosci 15:653250. doi: 10.3389/fnbeh.2021.653250
Summary: Ophidiophobia (snake phobia) is one of the most common specific phobias. Noninvasive imaging studies of patients with specific phobia reported that the medial prefrontal cortex (mPFC), especially the rostral part of the anterior cingulate cortex (rACC), and amygdala are activated during the presentation of phobogenic stimuli. Attentional bias to specific animals promotes anxiety and phobia. The mPFC is reported to be involved in attentional allocation to various salient visual stimuli. The findings suggest that the rACC focuses attention on snakes, and promotes aversive conditioning to snakes, which may lead to anxiety and ophidiophobia.
Usage: Prior work has demonstrated that lesions of the cortical cholinergic system of the basal forebrain impair performance in attentional tasks. 192-IgG-SAP (50 or 100 ng) was infused into the PFC of rats.
Related Products: 192-IgG-SAP (Cat. #IT-01)
Nanobody: a small antibody with big implications for tumor therapeutic strategy
Sun S, Ding Z, Yang X, Zhao X, Zhao M, Gao L, Chen Q, Xie S, Liu A, Yin S, Xu Z, Lu X (2021) Nanobody: a small antibody with big implications for tumor therapeutic strategy. Int J Nanomedicine 16:2337-2356. doi: 10.2147/IJN.S297631
Summary: This Journal Club commentary focuses on the publication by Kalinchuk et al.
Usage: The author refers to work with 192-IgG-SAP published by Blanco-Centurion et al. This group investigated whether basal forebrain cholinergic neurons are involved in adenosine regulation of sleep. 6 µg of 192-IgG-SAP was administered to the lateral ventricle of rats.
Related Products: 192-IgG-SAP (Cat. #IT-01)
See Also:
- Blanco-Centurion C et al. Adenosine and sleep homeostasis in the basal forebrain. J Neurosci 26(31):8092-8100, 2006.
- Kalinchuk AV et al. The role of cholinergic basal forebrain neurons in adenosine-mediated homeostatic control of sleep: lessons from 192 IgG-saporin lesions. Neuroscience 157:238-253, 2008.
Fluoxetine and ketamine reverse the depressive but not anxiety behavior induced by lesion of cholinergic neurons in the horizontal limb of the diagonal band of broca in male rat
Chen L, Ke Y, Ma H, Gao L, Zhou Y, Zhu H, Liu H, Zhang F, Zhou W (2021) Fluoxetine and ketamine reverse the depressive but not anxiety behavior induced by lesion of cholinergic neurons in the horizontal limb of the diagonal band of broca in male rat. Front Behav Neurosci 15:602708. doi: 10.3389/fnbeh.2021.602708
Summary: A lesion of horizontal limb of the diagonal band of Broca (HDB) cholinergic neurons and followed hippocampus damage may be involved in the pathogenesis of depression.
Usage: Injections of 192-IgG-SAP were made bilaterally into the HDB in a volume of 0.5 µL per side with a concentration of 0.5 µg/µL.
Related Products: 192-IgG-SAP (Cat. #IT-01)
Disruption of basal forebrain cholinergic neurons after traumatic brain injury does not compromise environmental enrichment-mediated cognitive benefits.
Moschonas EH, Leary JB, Memarzadeh K, Bou-Abboud CE, Folweiler KA, Monaco CM, Bondi CO (2021) Disruption of basal forebrain cholinergic neurons after traumatic brain injury does not compromise environmental enrichment-mediated cognitive benefits. Brain Res 1751:147175. doi: 10.1016/j.brainres.2020.147175
Objective: To determine if basal forebrain cholinergic neurons are important mediators of environmental enrichment (EE)-induced benefits after traumatic brain injury.
Summary: These data show that despite significant medial septal ChAT+ cell loss, the EE-mediated benefit in cognitive recovery is not compromised.
Usage: 0.22 μg/1.0 μL 192-IgG-SAP was infused over 5 min at a rate of 0.2 μL/min.
Related Products: 192-IgG-SAP (Cat. #IT-01)
Lesions of the nucleus basalis magnocellularis (Meynert) induce enhanced somatosensory responses and tactile hypersensitivity in rats.
Dezawa S, Nagasaka K, Watanabe Y, Takashima I (2021) Lesions of the nucleus basalis magnocellularis (Meynert) induce enhanced somatosensory responses and tactile hypersensitivity in rats. Exp Neurol 335:113493. doi: 10.1016/j.expneurol.2020.113493
Summary: The authors used 192-IgG-SAP to produce a selective cholinergic lesion in the nucleus basalis of Meynert (NBM) of rats and investigated whether the NBM lesion led to tactile hypersensitivity in the forepaw. Results suggest that neuronal loss in the NBM diminishes acetylcholine actions in the S1, thereby enhancing the cortical representation of sensory stimuli, which may in turn lead to behavioral hypersensitivity.
Usage: The lesion group received injection of 0.3 μL of 192-IgG-SAP into the left nucleus basalis of Meynert (NBM).
Related Products: 192-IgG-SAP (Cat. #IT-01)