guanylate cyclase inhibitor/neoplasms

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Cyclic GMP and guanylate cyclase mediate lipopolysaccharide-induced Kupffer cell tumor necrosis factor-alpha synthesis.

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Tumor necrosis factor-alpha (TNF-alpha) is an important mediator in sepsis and septic shock. Kupffer cells (KCs) are the resident macrophages of the liver and are potent producers of TNF-alpha in response to inflammatory stimuli such as bacterial endotoxin or lipopolysaccharide (LPS). Although the

Tumor necrosis factor-alpha-induced activating protein-1 activity is modulated by nitric oxide-mediated protein kinase G activation.

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We tested the hypothesis that protein kinase (PK)G activation in response to nitric oxide ((*)NO) mediates tumor necrosis factor (TNF)-alpha-induced activation of the transcription factor activating protein-1 (AP-1) in pulmonary microvessel endothelial monolayers (PEM). The DNA-binding activity of

Apoptosis induction of poly-S-nitrosated human serum albumin in resistant solid tumor under hypoxia can be restored by phosphodiesterase 5 inhibition.

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Poly-S-nitrosated human serum albumin (Poly-SNO-HSA) delivered and accumulated nitric oxide (NO) in tumors and induces apoptosis. Tumor hypoxia is strongly associated with malignant progression and tumor resistance to therapy. In this study, we examined the cytotoxic effect of Poly-SNO-HSA under

Nitric oxide inhibits hetero-adhesion of cancer cells to endothelial cells: restraining circulating tumor cells from initiating metastatic cascade.

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Adhesion of circulating tumor cells (CTCs) to vascular endothelial bed becomes a crucial starting point in metastatic cascade. We hypothesized that nitric oxide (NO) may prevent cancer metastasis from happening by its direct vasodilation and inhibition of cell adhesion molecules (CAMs). Here we show

Protection against TNF-induced lethal shock by soluble guanylate cyclase inhibition requires functional inducible nitric oxide synthase.

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Hypotension and shock observed in sepsis, SIRS, and tumor necrosis factor (TNF) or cytokine-based cancer treatment are the consequence of excessive nitric oxide (NO) production and subsequent soluble guanylate cyclase (sGC)-mediated vascular smooth muscle relaxation. We demonstrate here that, while

Elucidation of the therapeutic enhancer mechanism of poly-S-nitrosated human serum albumin against multidrug-resistant tumor in animal models.

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Human serum albumin (HSA) is the most abundant circulating protein and its S-nitrosated form serves as a reservoir of nitric oxide (NO). Previously, we prepared poly-S-nitrosated HSA (Poly-SNO-HSA) by incubation with Traut's Reagent and isopentyl nitrite and evaluated its potential as a novel

Nitric oxide protects human extravillous trophoblast cells from apoptosis by a cyclic GMP-dependent mechanism and independently of caspase 3 nitrosylation.

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Apoptosis is thought to play an important regulatory role in placental development and inappropriate trophoblast apoptosis has been implicated in complications of pregnancy such as pre-eclampsia. Here we show that apoptosis of a human extravillous trophoblast-derived cell line (SGHPL-4) can be

New Therapeutic Agent against Arterial Thrombosis: An Iridium(III)-Derived Organometallic Compound.

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Platelet activation plays a major role in cardio and cerebrovascular diseases, and cancer progression. Disruption of platelet activation represents an attractive therapeutic target for reducing the bidirectional cross talk between platelets and tumor cells. Platinum (Pt) compounds have been used for

Ir-6: A Novel Iridium (III) Organometallic Derivative for Inhibition of Human Platelet Activation.

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Platelet activation has been reported to play a major role in arterial thrombosis, cancer metastasis, and progression. Recently, we developed a novel Ir(III)-based compound, [Ir(Cp∗)1-(2-pyridyl)-3-(4-dimethylaminophenyl)imidazo[1,5-a]pyridine Cl]BF4 or Ir-6 and assessed its effectiveness as an

Suppression of Human Platelet Activation via Integrin αIIbβ3 Outside-In Independent Signal and Reduction of the Mortality in Pulmonary Thrombosis by Auraptene.

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Auraptene is the most abundant coumarin derivative from plants. The pharmacological value of this compound has been well demonstrated, especially in the prevention of cancer and neurodegenerative diseases. Platelet activation is a major factor contributing to arterial thrombosis. Thus, this study

Prevention of arterial thrombosis by nobiletin: in vitro and in vivo studies.

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Nobiletin, a bioactive polymethoxylated flavone isolated from citrus fruits, has been proven to prevent cancer and inflammation. Dietary flavonoids have been shown to reduce the risk of cardiovascular diseases (CVDs), and platelet activation plays a crucial role in CVDs. This study investigated the

Nitric oxide-induced Cl- secretion in isolated rat colon is mediated by the release of thromboxane A2.

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We have shown previously that thromboxane A2 (TXA2), which may be released by the anti-tumour drug irinotecan and by platelet-activating factor (PAF), causes Cl- secretion in the isolated rat colon. In the present study, the involvement of TXA2 in nitric oxide-induced Cl- secretion in isolated rat

Activation of muscarinic receptors by a hydroalcoholic extract of Dicksonia sellowiana Presl. HooK (Dicksoniaceae) induces vascular relaxation and hypotension in rats.

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Dicksonia sellowiana (Presl.) Hook is a native plant from the Central and South Americas that contain high levels of polyphenols, antioxidant compounds involved in protection against inflammation, cancer and cardiovascular risk. A phytomedicinal preparation obtained from aerial parts of D.

Novel iridium (III)‑derived organometallic compound for the inhibition of human platelet activation.

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Since cisplatin achieved clinical success, transition metal platinum (Pt) drugs have been effectively used for the treatment of cancer. Iridium (Ir) compounds are considered to be potential alternatives to Pt compounds, as they possess promising anticancer effects with minor side effects. Platelet

Inhibition of nitroso chemical carcinogen activation of rat hepatic guanylate cyclase by anticancer agents.

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Recent studies have demonstrated that nitroso chemical carcinogens activate guanylate cyclase (EC 4.6.1.2) which catalyzes the production of guanosine 3',5'-monophosphate. This nucleotide is thought to be involved in normal and abnormal cell growth. We examined the effect of 3 major classes of

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