Opuntia ficus-indica attenuates neuronal injury in in vitro and in vivo models of cerebral ischemia

2006 ◽  
Vol 104 (1-2) ◽  
pp. 257-262 ◽  
Author(s):  
Jung-Hoon Kim ◽  
Shin-Mi Park ◽  
Hyun-Joo Ha ◽  
Chang-Jong Moon ◽  
Tae-Kyun Shin ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Neuronal Injury ◽  
Opuntia Ficus Indica ◽  
In Vivo Models

scholarly journals In Vitro and In Vivo Models of Cerebral Ischemia Show Discrepancy in Therapeutic Effects of M2 Macrophages

PLoS ONE ◽  
2013 ◽  
Vol 8 (6) ◽  
pp. e67063 ◽  
Author(s):  
Virginie Desestret ◽  
Adrien Riou ◽  
Fabien Chauveau ◽  
Tae-Hee Cho ◽  
Emilie Devillard ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Therapeutic Effects ◽  
M2 Macrophages ◽  
In Vivo Models

Neuroprotective effects of a new synthetic peptide, CMX-9236, in in vitro and in vivo models of cerebral ischemia

2003 ◽  
Vol 963 (1-2) ◽  
pp. 214-223 ◽  
Author(s):  
Victor E Shashoua ◽  
David S Adams ◽  
Anne Boyer-Boiteau ◽  
Ann Cornell-Bell ◽  
Fuhai Li ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Synthetic Peptide ◽  
Neuroprotective Effects ◽  
In Vivo Models

scholarly journals Cellular Origin and Regulation of D-and L-Serine in in Vitro and in Vivo Models of Cerebral Ischemia

2014 ◽  
Vol 34 (12) ◽  
pp. 1928-1935 ◽  
Author(s):  
Takato Abe ◽  
Masataka Suzuki ◽  
Jumpei Sasabe ◽  
Shinichi Takahashi ◽  
Miyuki Unekawa ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Nmda Receptor ◽  
Cultured Cells ◽  
Long Term Potentiation ◽  
Artery Occlusion ◽  
In Vitro Experiments ◽  
In Vivo Models ◽  
Cellular Origin

D-Serine is known to be essential for the activation of the N-methyl-D-aspartate (NMDA) receptor in the excitation of glutamatergic neurons, which have critical roles in long-term potentiation and memory formation. D-Serine is also thought to be involved in NMDA receptor-mediated neurotoxicity. The deletion of serine racemase (SRR), which synthesizes D-Serine from L-Serine, was recently reported to improve ischemic damage in mouse middle cerebral artery occlusion model. However, the cell type in which this phenomenon originates and the regulatory mechanism for D-/L-Serine remain elusive. The D-/L-Serine content in ischemic brain increased until 20 hours after recanalization and then leveled off gradually. The results of in vitro experiments using cultured cells suggested that D-Serine is derived from neurons, while L-Serine seems to be released from astroglia. Immunohistochemistry studies of brain tissue after cerebral ischemia showed that SRR is expressed in neurons, and 3-phosphoglycerate dehydrogenase (3-PGDH), which synthesizes L-Serine from 3-phosphoglycerate, is located in astrocytes, supporting the results of the in vitro experiments. A western blot analysis showed that neither SRR nor 3-PGDH was upregulated after cerebral ischemia. Therefore, the increase in D-/L-Serine was not related to an increase in SRR or 3-PGDH, but to an increase in the substrates of SRR and 3-PGDH.

Protective effects of l-pGlu-(2-propyl)-l-His-l-ProNH2, a newer thyrotropin releasing hormone analog in in vitro and in vivo models of cerebral ischemia

Peptides ◽  
2011 ◽  
Vol 32 (6) ◽  
pp. 1225-1231 ◽  
Author(s):  
Satyendra Kumar Rajput ◽  
Maqsood Ahmad Siddiqui ◽  
Vivek Kumar ◽  
Chhuttan Lal Meena ◽  
Aditya Bhushan Pant ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Thyrotropin Releasing Hormone ◽  
Protective Effects ◽  
In Vivo Models ◽  
Releasing Hormone ◽  
Hormone Analog

scholarly journals Sphk1-induced Autophagy in Microglia Promotes Neuronal Injury Following Cerebral Ischemia-Reperfusion

2020 ◽  
Author(s):  
Manhua Lv ◽  
Yongjia Jiang ◽  
Dayong Zhang ◽  
Dan Yao ◽  
Yuefeng Cheng ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Ischemia Reperfusion Injury ◽  
Ischemia Reperfusion ◽  
Neuronal Injury ◽  
Glucose Deprivation ◽  
Enzyme Linked Immunosorbent Assay ◽  
Cerebral Ischemia Reperfusion ◽  
The Impact

Abstract Background: Microglial hyperactivation driven by SphK1/S1P signaling and consequent inflammatory mediator production is a key driver of cerebral ischemia-reperfusion injury (CIRI). While SphK1 reportedly controls autophagy and microglial activation, it remains uncertain as to whether it is similarly able to regulate damage mediated by CIRI-activated microglia. Methods: In the present study, we utilized both an in vitro oxygen-glucose deprivation reperfusion (OGDR) model and an in vivo rat model of focal CIRI to test whether Sphk1 and autophagy is expressed in microglia. Western blot analysis was used to estimate the autophagy protein level (LC3 and SQSTM ) at different time points after OGDR. To detect cytokine secretion in microglial supernatants in response to OGDR, we measured the concentration of IL-1β, IL-6 and TNF-α in the culture supernatants using an enzyme-linked immunosorbent assay (ELISA). To evaluate whether microglia subjected to OGDR exhibited neuronal injury, we used a commercially available terminal transferase-mediated deoxyuridine triphosphate-biotin nick end labeling (TUNEL) kit and flow cytometry to detect apoptotic neurons.Results: We determined that in the context of CIRI, microglia upregulated SphK1 and induced autophagy, while inhibiting these changes by lentivirus targeting SphK1 significantly decreased expression of autophagy . Moreover, we determined that autophagic body formation was enhanced in cerebral tissues following I/R. We also explored the impact of SphK1-induced autophagy on microglial inflammatory cytokine production and associated neuronal apoptosis using an in vitro OGDR model system. At a mechanistic level, we found that SphK1 promotes autophagy via the tumor necrosis factor receptor-associated factor 2 (TRAF2) pathway. Conclusion: These results reveal a novel mechanism whereby SphK1-induced autophagy in microglia can contribute to the pathogenesis of CIRI, potentially highlighting novel avenues for future therapeutic intervention in IS patients.

scholarly journals Neuroprotective Effects of Insulin-Like Growth Factor-Binding Protein Ligand Inhibitors in Vitro and in Vivo

2003 ◽  
Vol 23 (10) ◽  
pp. 1160-1167 ◽  
Author(s):  
Kenneth B Mackay ◽  
Sarah A Loddick ◽  
Gregory S Naeve ◽  
Alicia M Vana ◽  
Gail M Verge ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Infarct Size ◽  
Infarct Volume ◽  
Artery Occlusion ◽  
Dependent Manner ◽  
Neuroprotective Effects ◽  
In Vivo Models ◽  
Igf I

The role of brain insulin-like growth factors (IGFs) and IGF binding proteins (IGFBPs) in neuroprotection was further investigated using in vitro and in vivo models of cerebral ischemia by assessing the effects of IGF-I, IGF-II, and high affinity IGFBP ligand inhibitors (the peptide [Leu24, 59, 60, Ala31]hIGF-I (IGFBP-LI) and the small molecule NBI-31772 (1-(3,4-dihydroxybenzoyl)-3-hydroxycarbonyl-6, 7-dihydroxyisoquinoline), which pharmacologically displace and elevate endogenous, bioactive IGFs from IGFBPs. Treatment with IGF-I, IGF-II, or IGFBP-LI (2 μg/mL) significantly ( P < 0.05) reduced CA1 damage in organotypic hippocampal cultures resulting from 35 minutes of oxygen and glucose deprivation by 71%, 60%, and 40%, respectively. In the subtemporal middle cerebral artery occlusion (MCAO) model of focal ischemia, intracerebroventricular (icv) administration of IGF-I and IGF-II at the time of artery occlusion reduced ischemic brain damage in a dose-dependent manner, with maximum reductions in total infarct size of 37% ( P < 0.01) and 38% ( P < 0.01), respectively. In this model of MCAO, icv administration of NBI-31772 at the time of ischemia onset also dose-dependently reduced infarct size, and the highest dose (100 μg) significantly reduced both total (by 40%, P < 0.01) and cortical (by 43%, P < 0.05) infarct volume. In the intraluminal suture MCAO model, administration of NBI-31772 (50 μg icv) at the time of artery occlusion reduced both cortical infarct volume (by 40%, P < 0.01) and brain swelling (by 24%, P < 0.05), and it was still effective when treatment was delayed up to 3 hours after the induction of ischemia. These results further define the neuroprotective properties of IGFs and IGFBP ligand inhibitors in experimental models of cerebral ischemia.

Neuroprotective effects of a novel water-soluble poly(ADP-ribose) polymerase-1 inhibitor, MP-124, in in vitro and in vivo models of cerebral ischemia

2011 ◽  
Vol 1389 ◽  
pp. 169-176 ◽  
Author(s):  
Yasuhiro Egi ◽  
Shigeru Matsuura ◽  
Tomoyuki Maruyama ◽  
Masakazu Fujio ◽  
Satoshi Yuki ◽  
...  
Keyword(s):  
Cerebral Ischemia ◽  
Water Soluble ◽  
Neuroprotective Effects ◽  
In Vivo Models ◽  
Soluble Poly
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