INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 19
·10406
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IF 4.9
Yan Zhang,Yaping Yang,Huicong Liang,Yuerun Liang,Guixin Xiong,Fang Lu,Kan Yang,Qi Zou,Xiaomin Zhang,Guanhua Du,Ximing Xu,Jiejie Hao
Asthma is a chronic airway inflammation that is considered a serious public health concern worldwide. Nobiletin (5,6,7,8,3′,4′-hexamethyl flavonoid), an important compound isolated from several traditional Chinese medicines, especially Citri Reticulatae Pericarpium, is widely used for a number of indications, including cancer, allergic diseases, and chronic inflammation. However, the mechanism by which nobiletin exerts its anti-asthmatic effect remains unclear. In this research, we comprehensively demonstrated the anti-asthmatic effects of nobiletin in an animal model of asthma. It was found that nobiletin significantly reduced the levels of inflammatory cells and cytokines in mice and alleviated airway hyperresponsiveness. To explore the target of nobiletin, we identified PDE4B as the target of nobiletin through pharmacophore modeling, molecular docking, molecular dynamics simulation, SPR, and enzyme activity assays. Subsequently, it was found that nobiletin could activate the cAMP-PKA-CREB signaling pathway downstream of PDE4B in mouse lung tissues. Additionally, we studied the anti-inflammatory and anti-airway remodeling effects of nobiletin in LPS-induced RAW264.7 cells and TGF-β1-induced ASM cells, confirming the activation of the cAMP-PKA-CREB signaling pathway by nobiletin. Further validation in PDE4B-deficient RAW264.7 cells confirmed that the increase in cAMP levels induced by nobiletin depended on the inhibition of PDE4B. In conclusion, nobiletin exerts anti-asthmatic activity by targeting PDE4B and activating the cAMP-PKA-CREB signaling pathway.
研究领域:
药理学
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免疫学
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分子生物学
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呼吸医学
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 11
·5939
·
IF 4.9
Jian Ouyang,Na Hu,Honglun Wang
Petanin, an acylated anthocyanin from the Solanaceae family, shows potential in tyrosinase inhibitory activity and anti-melanogenic effects; however, its mechanism remains unclear. Therefore, to investigate the underlying mechanism of petanin’s anti-melanogenic effects, the enzyme activity, protein expression and mRNA transcription of melanogenic and related signaling pathways in zebrafish using network pharmacology, molecular docking and molecular dynamics simulation were combined for analysis. The results showed that petanin could inhibit tyrosinase activity and melanogenesis, change the distribution and arrangement of melanocytes and the structure of melanosomes, reduce the activities of catalase (CAT) and peroxidase (POD) and enhance the activity of glutathione reductase (GR). It also up-regulated JNK phosphorylation, inhibited ERK/RSK phosphorylation and down-regulated CREB/MITF-related protein expression and mRNA transcription. These results were consistent with the predictions provided through network pharmacology and molecular docking. Thus, petanin could inhibit the activity of tyrosinase and the expression of tyrosinase by inhibiting and negatively regulating the tyrosinase-related signaling pathway ERK/CREB/MITF through p-JNK. In conclusion, petanin is a good tyrosinase inhibitor and anti-melanin natural compound with significant market prospects in melanogenesis-related diseases and skin whitening cosmetics.
研究领域:
药理学
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生物化学
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分子生物学
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斑马鱼研究
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化妆品科学
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高影响因子
NEUROSCIENCE LETTERS
·
2024
·
IF 2.5
Xiyong Xiang,Siyu Xia,Shan Li,Yirong Zeng,Lixuan Wang,Yan Zhou
The occurrence and development of Alzheimer’s disease (AD) is closely related to neuronal loss, inflammatory response, cholinergic imbalance, and Tau protein hyperphosphorylation. Previous studies have confirmed that Streptozotocin (STZ) can be used to establish a rat model of AD by injecting it into the rat brain via the lateral ventricle. Our previous research showed that Danshentone IIA (Tan IIA) can improve cognitive dysfunction in rats caused by CC chemokine ligand 2, and network pharmacology results show that Tan IIA is very likely to improve AD symptoms through the cyclic adenosine monophosphate response element binding protein (CREB), brain-derived neurotrophic factor (BDNF), and tyrosine kinase receptor protein (TrkB) pathway. The results of the water maze experiment showed that after Tan IIA treatment, the escape latency of AD rats was shortened and the number of platform crossings increased; in the new object recognition experiment, the discrimination index of AD rats significantly increased after treatment; Nissl staining and Tunel staining results showed that Tan IIA increased the number of surviving neurons in the hippocampus of cognitively impaired rats and reduced neuronal apoptosis; Bielschowsky silver staining results showed that Tan IIA reduced neurofibrillary tangles (NFTs) in the AD rats; Tan IIA can reduce the inflammatory response and oxidative stress reaction in the hippocampus of AD rats, and at the same time reduce the activity of acetylcholinesterase. Tan IIA can significantly increase the expression of CREB, BDNF, TrkB in the hippocampal tissue of STZ-injured rats (P < 0.05). These data suggest that Tan IIA may upregulate the expression of the CREB-BDNF-TrkB signaling pathway in the hippocampus of brain tissue, produce anti-neuroinflammatory, antioxidant stress, inhibit neuronal apoptosis effects, and improve cholinergic neurotransmitter disorder induced by STZ, reduce the neuronal damage and learning and memory impairment caused by STZ in rats, and improve the cognitive function of rats.
研究领域:
神经科学
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药理学
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分子生物学
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神经退行性疾病
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JOURNAL OF ETHNOPHARMACOLOGY
·
2024
·
IF 4.8
Yassmin Raafat Hassan,Riham A. El-Shiekh,Hala M. El Hefnawy,Osama G. Mohamed,Karema Abu-Elfotuh,Ahmed M. Hamdan,Alshaymaa Darwish,Ayah M.H. Gowifel,Ashootosh Tripathi,Camilia George Michael
Ethnopharmacological relevance Irvingia gabonensis (Aubry-Lecomte ex O'Rorke) Baill., also known as “African mango” or “bush mango”, belonging to family Irvingiaceae, has been mostly used as food and traditional medicine for weight loss and to enhance the health. Aim of the study The overconsumption of high-fat and high-carbohydrate (HFHC) food induces oxidative stress, leading to neurological and cognitive dysfunction . Consequently, there is an immediate need for effective treatment. Hence, this study explored the efficacy of orlistat , metformin , and I. gabonensis seeds' total aqueous extract (IG SAE) in addressing HFHC-induced cognitive impairment by mitigating oxidative stress and their underlying mechanistic pathways. Materials and methods Initially, the secondary metabolite profile of IG SAE is determined using high-performance liquid chromatography coupled with a mass detector (UHPLC/MS). The in vivo study involves two phases: an established model phase with control (10 rats on a standard diet) and HFHC diet group (50 rats) for 3 months. In the study phase, HFHC is divided into 5 groups. The first subgroup receives HFHC diet only, while the remaining groups each receive HFHC diet with either Orlistat, metformin, or IG SAE at doses of 100 mg/kg and 200 mg/kg, respectively, for 28 days. Results More than 150 phytoconstituents were characterized for the first holistic approach onto IG metabolome. Characterization of IG SAE revealed that tannins dominate metabolites in the plant. Total phenolics and flavonoids were estimated to standardize our extract (77.12 ± 7.09 μg Gallic acid equivalent/mg extract and 8.039 ± 0.53 μg Rutin equivalent/mg extract, respectively). Orlistat, metformin, and IG SAE successfully reduced the body weight, blood glucose level, lipid profile, oxidative stress and neurotransmitters levels leading to improved behavioral functions as well as histological alternation. Also, IG SAE halted inflammation, apoptosis, and endoplasmic reticulum stress, together with promoting autophagy, via modulation of PI3K/AKT/GSK-3β/CREB, PERK/CHOP/Bcl-2 and AMPK/SIRT-1/m-TOR pathways. Conclusion Metformin, orlistat, and IG SAE offer a promising multi-target therapy to mitigate HFHC diet-induced oxidative stress, addressing cognitive function. This involves diverse molecular mechanisms, particularly the modulation of inflammation, ER stress, and both PI3K/AKT/GSK-3β/CREB and AMPK/SIRT-1/m-TOR pathways. Furthermore, the higher dose of IG SAE demonstrated effects comparable to orlistat and metformin across most studied parameters.
研究领域:
民族药理学
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药理学
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神经科学
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代谢组学
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分子生物学
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Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology
·
2014
·Vol. 298
·期 3
·501-512
·
IF 1.53
Shuaishuai Huang,Yu Ren,Ping Wang,Yanyuan Li,Xue Wang,Haihui Zhuang,Rong Fang,Yuduo Wang,Ningsheng Liu,Michael Hehir,Jeff X. Zhou
Our previous studies illustrated that a steady increase of intracellular calcium concentration ([Ca 2+ ]i) was important for maintaining microtubules (MTs) rearrangement in apoptotic cells. However, little is known about the effect of calcium sensing receptor (CaSR)-mediated increase in [Ca 2+ ]i on cytoskeleton gene expression. We examined the impact of taxol or CaSR agonist/antagonist on the regulation of [Ca 2+ ]i concentration, cytoskeleton arrangement, phosphorylated CREB and cytoskeleton gene expressions in HeLa cells with dominant negative plasmid of CREB (PM). This study demonstrated that Gdcl3 (a specific CaSR agonist) evoked a rapid increase of [Ca 2+ ]i, formed a rigid bundle of MTs which surrounded the nucleus and decreased the cytoskeleton gene expressions in HeLa cells. These effects were rescued by addition of NPS2390 (a specific CaSR antagonist). Moreover, CaSR activity affected cytoskeleton gene expression through transcription factor CREB. Histoscores of pCREB immunoreactivity in tissues of cervical adenocarcinoma, renal clear cell carcinoma, and diffuse large B-cell lymphoma were markedly increased compared with non malignant tissue. These data demonstrate, for the first time, that CaSR-mediated increase in [Ca 2+ ]i probably modulate cytoskeleton organization and gene expression via transcription factor CREB. Anat Rec, 298:501–512, 2015. © 2014 Wiley Periodicals, Inc.
研究领域:
分子生物学
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细胞生物学
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肿瘤学
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高影响因子
JOURNAL OF PINEAL RESEARCH
·
2026
·Vol. 78
·期 5
·e70182
·
IF 7.5
Jiancheng Yang,Jingmin Che,Ming Yang,Yan Feng,Qingmei Li,Yuhong Zeng
Postmenopausal osteoporosis (PMOP) is linked to iron accumulation. Melatonin has iron-chelating and antioxidant properties, but its mechanism against osteoclastogenesis remains unclear. This study investigated whether melatonin suppresses osteoclast formation by targeting the iron/ROS-CREB-PGC-1β-mediated mitochondrial biogenesis pathway. In vitro , bone marrow-derived macrophages (BMMs) were treated with RANKL and melatonin (10–1000 nM). Melatonin concentration-dependently inhibited osteoclast differentiation, reduced intracellular ferrous and total iron levels, decreased ROS and oxidative stress markers, and suppressed mitochondrial biogenesis. Mechanistically, melatonin indirectly suppressed PGC‑1β expression via inhibition of CREB phosphorylation, without affecting PGC‑1α expression. The CREB activator forskolin reversed melatonin's effects, whereas the CREB inhibitor 666-15 mimicked them. In vivo , ovariectomized (OVX) mice received weekly injections of iron dextran to model moderate iron overload, with or without oral melatonin. Melatonin ameliorated iron‑induced bone loss, improved bone microarchitecture and biomechanical properties, reduced tissue iron stores and bone ROS levels, and suppressed osteoclast mitochondrial biogenesis and the CREB/PGC-1β pathway; these effects were counteracted by forskolin. In conclusion, melatonin prevents osteoclastogenesis and counters bone loss due to iron accumulation in estrogen‑deficient conditions by chelating iron, scavenging ROS, and blocking the iron/ROS‑activated CREB/PGC‑1β axis, thereby suppressing mitochondrial biogenesis. This study offers a mechanistic explanation for using melatonin as a possible treatment for PMOP, particularly when accompanied by iron overload.
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BIOCHEMICAL PHARMACOLOGY
·
2026
·
IF 6.5
Jiajia Chen,Xiaoxiao Liu,Ruoyu Wang,Jinjin Li,Zhifei Xu,Bo Yang,Qiaojun He,Xiaochun Yang,Hao Yan,Peihua Luo
Sotorasib, a first-in-class KRAS G12C inhibitor, has demonstrated substantial clinical efficacy in KRAS G12C–mutant malignancies but is frequently associated with gastrointestinal adverse events, the mechanisms of which remain poorly understood. In this study, we investigated the molecular basis of sotorasib-induced intestinal toxicity using complementary in vitro and an HP-β-CD-optimized in vivo model. Sotorasib treatment disrupted intestinal epithelial homeostasis by promoting apoptosis and suppressing proliferative capacity, resulting in impaired epithelial barrier integrity. Mechanistically, sotorasib markedly suppressed intracellular cAMP signaling in intestinal epithelial cells, as evidenced by reduced protein kinase A (PKA) activity and decreased phosphorylation of the transcription factor CREB. These effects were consistently observed in IEC-6 cells and murine colonic tissues lacking the KRAS G12C mutation, indicating a KRAS-independent mechanism. Pharmacological elevation of intracellular cAMP with forskolin partially restored CREB phosphorylation, attenuated epithelial apoptosis, enhanced proliferative activity, and improved expression of barrier-associated markers. In contrast, in NCI-H358 cells, forskolin increased CREB phosphorylation but failed to rescue sotorasib-induced growth inhibition, highlighting a pronounced cell type-dependent response to sotorasib. Collectively, our findings identify suppression of the cAMP/PKA/CREB signaling axis as a key mechanism underlying sotorasib-induced intestinal epithelial injury and provide mechanistic insight into the tissue-selective gastrointestinal toxicity of KRAS G12C-targeted therapy
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LIVER INTERNATIONAL
·
2023
·
IF 6.7
Qiuyuan Yang,Yue Wu,Wei Liu,Xiaojuan Ou,Wei Zhang,Jianning Wang,Yanzhong Chang,Fudi Wang,Ming Gao,Sijin Liu
Background and Aims Disorders in liver lipid metabolism have been implicated in a range of metabolic conditions, including fatty liver and liver cancer. Altered lipid distribution within the liver, shifting from the pericentral to the periportal zone under pathological circumstances, has been observed; however, the underlying mechanism remains elusive. Iron, an essential metal, exhibits a zonal distribution in the liver similar to that of lipids. Nevertheless, the precise relationship between iron and lipid distribution, especially in the pericentral and periportal zones, remains poorly understood. Methods We conducted comprehensive in vitro and in vivo experiments, combining with in situ analysis and RNA sequencing, aiming for a detailed exploration of the causal relationship between iron accumulation and lipid metabolism. Results Our research suggests that iron overload can disrupt the normal distribution of lipids within the liver, particularly in the periportal zone. Through meticulous gene expression profiling in both the pericentral and periportal zones, we identified pyruvate carboxylase (PC) as a pivotal regulator in iron overload-induced lipid accumulation. Additionally, we revealed that the activation of cyclic adenosine monophosphate response element binding protein (CREB) was indispensable for Pc gene expression when in response to iron overload. Conclusions In summary, our investigation unveils the crucial involvement of iron overload in fostering hepatic lipid accumulation in the periportal zone, at least partly mediated by the modulation of Pc expression. These insights offer new perspectives for understanding the pathogenesis of fatty liver diseases and their progression.
研究领域:
肝病学
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代谢学
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分子生物学
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病理学
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高影响因子
Acta Pharmaceutica Sinica B
·
2024
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IF 14.7
Mengyi Yan,Xiayun Chen,Xiaotong Li,Qianqian Liu,Baixue Yu,Yi Cen,Wei Zhang,Yibin Liu,Xinxuan Li,Ying Chen,Tao Wang,Shiying Li
The immunosuppressive phenotype of tumor cells extensively attenuates the immune activation effects of traditional treatments. In this work, a transferrin receptor (TfR) targeted immunostimulant (PTI) is fabricated for photodynamic immunotherapy against metastatic tumors by interrupting β -catenin signal pathway. To synthesize PTI, the photosensitizer conjugated TfR targeting peptide moiety (Palmitic-K(PpIX)-HAIYPRH) is unitized to encapsulate the transcription interrupter of ICG-001. On the one hand, the recognition of PTI and TfR can promote drug delivery into tumor cells to destruct primary tumors through photodynamic therapy and initiate an immunogenic cell death with the release of tumor-associated antigens. On the other hand, PTI will interrupt the binding between β -catenin and cAMP response element-binding protein (CREB), regulating the gene transcription to downregulate programmed death ligand 1 (PD-L1) while upregulating C–C motif chemokine ligand 4 (CCL4). Furthermore, the elevated CCL4 can recruit the dendritic cells to present tumor-specific antigens and promote T cells activation and infiltration, and the downregulated PD-L1 can avoid the immune evasion of tumor cells and activate systemic anti-tumor immunity to eradicate lung metastasis. This work may inspire the development of antibody antibody-free strategy to activate systemic immune response in consideration of immunosuppressive conditions.
研究领域:
肿瘤学
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免疫疗法
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药理学
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分子生物学
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细胞信号传导
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FASEB JOURNAL
·
2025
·Vol. 39
·期 14
·e70867
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IF 4.2
Xiaolin Dou,Zhongcheng Zhu,Qizhen Chen,Yebin Lu
Acute lung injury (ALI) is closely associated with high mortality in severe acute pancreatitis (SAP). Nr4a3 is a nuclear receptor with proinflammatory effects. The role of Nr4a3 in SAP-associated ALI is unclear. Caerulein (CRE)-induced AP mice represented significant pancreatic and lung pathological injury, with high Nr4a3 expression in lung tissues. Nr4a3 expression in lung tissues of AP mice inhibited CD31 expression, suggesting lung microvascular injury. In vitro and in vivo experiments were performed to investigate the effect of Nr4a3 inhibition in mitigating SAP-associated ALI. Nr4a3 downregulation reduced permeability, increased trans-endothelial electrical resistance (TEER) and VE-cadherin expression in TNF-α-induced human pulmonary microvascular endothelial cells (hPMVECs), suggesting recovered endothelial barrier function. Nr4a3 knockdown attenuated lung injury in AP mice, as reflected by restored lung edema and endothelial barrier function. Reduced inflammatory cell counts and mediators indicated that Nr4a3 knockdown mitigated lung inflammation in AP mice. The up-regulation of Nr4a3 in TNF-α-induced hPMVECs was further elevated after Sirt1 (a deacetylase) inhibition. Mechanistically, Sirt1 deficiency increased the enrichment of CREB at the Nr4a3 promoter through acetylating H3K27, thereby promoting Nr4a3 expression. Rescue experiments in vivo demonstrated that Nr4a3 knockdown attenuated lung injury aggravated by Sirt1 inhibition. These results suggested that Sirt1 might prevent CREB enrichment by inhibiting histone acetylation in the Nr4a3 promoter, thereby suppressing Nr4a3 expression and ultimately attenuating ALI. Graphical Mechanism diagram of Nr4a3 inhibition alleviating SAP-associated ALI. The high expression of Nr4a3 promotes inflammatory responses, increases the permeability of endothelial cells, and thus exacerbates SAP-induced ALI. Sirt1 regulates histone deacetylation in the promoter of Nr4a3, thereby affecting CREB recruitment and influencing Nr4a3 transcription. Sirt1-mediated transcriptional inhibition of Nr4a3 alleviates SAP-associated ALI. A few materials used in this figure were from Bioicons ( https://bioicons.com/ ) and these materials were all free.
研究领域:
分子生物学
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免疫学
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病理学
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细胞生物学
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药理学
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2026
·Vol. 74
·期 29
·22784-22797
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IF 6.7
Cheng Xin,Wang Jiaxing,Tan Haoyang,Ji Yaxin,Yu Xiaoqing,Hu Jiahuan,Li Siyao,Kang Huijie,Zhang Shuai,Xuanpan Ding,Jiao Wenjing,Fan Honggang,Zhao Yuan
Chronic
stress (CS) represents a pivotal environmental trigger
for depression. It induces depression-like behaviors primarily by
disrupting hypothalamic–pituitary–adrenal (HPA) axis
homeostasis and impairing hippocampal synaptic plasticity. Flavonoids
are abundant in human diet and possess significant neuroprotective
potential. We screened a library of 339 flavonoid compounds. Daidzein
(DAI) was identified as the lead compound. Subsequently, in rats subjected
to chronic restraint stress (CRS), DAI administration effectively
ameliorated depression-like behaviors, and attenuated hippocampal
histopathological damage. Network pharmacology and molecular docking
analyses suggested that ERK-related signaling may be involved in the
protective effects of DAI, and molecular dynamics simulations supported
the stability of the DAI-ERK2 complex. Furthermore, DAI activated
the ERK/CREB/BDNF signaling cascade, an effect that was partially
reversed by ERK inhibitor intervention. Notably, DAI also enhanced
dendritic complexity and spine density in hippocampus. In summary,
our study demonstrates that DAI alleviates stress-induced synaptic
plasticity damage through the ERK/CREB/BDNF signaling pathway.
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JOURNAL OF ETHNOPHARMACOLOGY
·
2022
·
IF 5.195
Yinsi Lin,Jianhui Su,Mingqiang Wang,Yanzhen Li,Zhongxiang Zhao,Zhanghua Sun
Ethnopharmacological relevance Hypericum sampsonii Hance (Yuanbaocao), a traditional herbal medicine with various pharmacological properties, is traditionally used to treat diarrhea and enteritis in China for hundreds of years. Investigations have uncovered its anti-inflammatory effects and corresponding bioactive constituents in H. sampsonii , however, the mechanisms of action for the treatment of enteritis are still unclear. Aims of the study This study aims to investigate the therapeutic effects and molecular mechanisms of H. sampsonii in a dextran sulfate sodium (DSS)-induced ulcerative colitis (UC) mice model. Materials and methods The major ingredients of the ethyl acetate extract (HS) in H. sampsonii were analyzed by UPLC-QTOF-MS. The inflammatory state of UC mice was caused by 3% DSS once daily for seven days. During DSS treatment, the mice in the positive drug group and the other three groups were orally administered 5-ASA (positive control) or HS daily. After treatment with HS or 5-ASA for a week, colonic pathological observation and the molecular biological index were performed for therapeutic evaluation, including visual inspection in the length and weight of colons and spleens, pathological morphology by hematoxylin and eosin (HE) staining, determination of oxidative markers, inflammatory cytokines and tumor necrosis factor-alpha (TNF-α) levels in colonic tissues as well as spleen index. Gene expression levels of inflammatory cytokines, antioxidant enzymes and PDE4 were detected using kits and PCR, while the expression of colonic tight junction proteins and relative signals of PKA/CREB signaling pathway were analyzed by Western blot . Results The main components in HS were found to be polycyclic polyprenylated acylphloroglucinols (PPAPs). HS distinctly alleviated DSS-stimulated UC-like lesions symptoms as evidenced by a significant recovery from body weight, colon lengths, and histological injuries of colons. HS reduced the accumulation of pro-inflammatory cytokines and improved the mRNA level of IL-10. Simultaneously, the colonic mRNA expression levels of IL-1β, IL-17, iNOS and COX-2 were all significantly suppressed by HS in a dose-dependent manner. Furthermore, HS restored the protein expression of tight junction-associated protein (ZO-1 and occluding). Besides, HS significantly inhibited the protein level of PDE4 and decreased the expressions of PKA and phosphorylated CREB. Conclusion This is the first work about main composition and anti-UC effect of Hypericum sampsonii Hance. For the first time, this study reveals HS is not toxic in a single dose and exert significantly protective effect in DSS-colitis mice. The underlying mechanisms may involve the improvement to inflammatory status, the protection for intestinal barrier function, the inhibition of PDE4, and the activation of PKA/CREB signaling pathway. This study provided an experimental basis for the traditional application of H. sampsonii Hance in the treatment of diarrhea and dysentery .
研究领域:
药理学
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免疫学
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分子生物学
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胃肠病学
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传统中药
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高影响因子
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