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1.
Dig Dis Sci ; 69(1): 56-65, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37943383

RESUMEN

BACKGROUND: The worldwide incidence of acute pancreatitis (AP) is increasing, but the dominant etiology of AP may vary by country. Mixed etiologies are involved in the increase in the number of AP patients. AIMS: This study was to analyze the etiological changes and prognosis of AP patients and explore the prognosis of AP patients with mixed etiologies. METHODS: Using a retrospective analysis method, AP patients hospitalized from January 2007 to December 2021 were selected from a pancreatic center in Nanchang, China. Trends in the main etiologies were analyzed, and the severity and prognosis of different etiologies were compared. RESULTS: A total of 10,071 patients were included. Cholelithiasis (56.0%), hyperlipidemia (25.3%), and alcohol (6.5%) were the top three etiologies. The proportion of acute biliary pancreatitis (ABP) showed a decreasing trend, while the proportion of hypertriglyceridemic pancreatitis (HTGP) and alcoholic AP showed an increasing trend (all ptrend < 0.001). The incidence of organ failure and necrotizing pancreatitis was higher in patients with HTGP than in those with AP induced by other etiologies (all p < 0.05). There was no statistically significant difference in mortality among patients with different etiologies. Patients with AP due to a mixed hypertriglyceridemia-alcoholic etiology had higher ICU admission rates and were more severe than those with AP induced by other mixed etiologies. CONCLUSION: In the past 15 years, the proportion of ABP has trended downward, while those of HTGP and alcoholic AP have risen. Among patients with mixed etiologies, those with a mixed hypertriglyceridemia-alcoholic etiology had a worse prognosis.


Asunto(s)
Hipertrigliceridemia , Pancreatitis Alcohólica , Humanos , Estudios Retrospectivos , Enfermedad Aguda , Hipertrigliceridemia/epidemiología , Pronóstico
2.
Pancreatology ; 23(5): 473-480, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37263836

RESUMEN

BACKGROUND: Acute pancreatitis in pregnancy (APIP) is associated with increased maternal and fetal mortality. OBJECTIVES: We sought to determine whether a low threshold for cesarean section (C-section) in severe acute pancreatitis (SAP) or Predict SAP improves maternal and fetal outcomes in patients with APIP. METHODS: We identified patients with APIP at a single institution from a prospective database and studied fetal and maternal health in APIP before (2005-2014) and after (2015-2019) introduction of multidisciplinary team management with a defined, lowered threshold for C-section. The primary end point was fetal mortality comprising abortion and perinatal death. Risk factors associated with fetal mortality were analyzed by univariable and multivariable logistic regression analysis. RESULTS: A total of 165 patients with APIP were eligible for analysis. There was a highly significant increase in patients undergoing C-section from 37 (30.8%) of 120 during 2005-2014 to 27 (60%) of 45 in 2015-2019 (P = 0.001), with a highly significant fall in fetal mortality from 37 (30.8%) of 120 to 3 (6.7%) of 45 between the same periods (P = 0.001), when maternal mortality fell from 6 to zero (P = 0.19). Maternal early systemic inflammatory response syndrome (SIRS) (odds ratio [OR] 6.98, 95% confidence interval [CI] 1.53, 30.80, P = 0.01) and SAP (OR 3.64, 95%CI 1.25, 10.60, P = 0.02) were two independent risk factors associated with fetal mortality. CONCLUSIONS: Multidisciplinary collaboration and a defined, low threshold for C-section improve fetal outcomes in patients with APIP.


Asunto(s)
Pancreatitis , Embarazo , Humanos , Femenino , Pancreatitis/complicaciones , Cesárea/efectos adversos , Enfermedad Aguda , Grupo de Atención al Paciente
3.
BMC Gastroenterol ; 23(1): 19, 2023 Jan 19.
Artículo en Inglés | MEDLINE | ID: mdl-36658497

RESUMEN

BACKGROUND: Organ failure (OF) and death are considered the most significant adverse outcomes in necrotizing pancreatitis (NP). However, there are few NP-related studies describing the clinical traits of OF and aggravated outcomes. PURPOSE: An improved insight into the details of OF and death will be helpful to the management of NP. Thus, in our research, we addressed the risk factors of OF and death in NP patients. METHODS: We performed a study of 432 NP patients from May 2017 to December 2021. All patients with NP were followed up for 36 months. The primary end-points were risk factors of OF and death in NP patients. The risk factors were evaluated by logistic regression analysis. RESULTS: NP patients with OF or death patients were generally older, had a higher APACHE II score, longer hospital stay, longer ICU stay, as well as a higher incidence of severe acute pancreatitis (SAP), shock and pancreatic necrosis. Independent risk factors related to OF included BMI, APACHE II score and SAP (P < 0.05). Age, shock and APACHE II score (P < 0.05) were the most significant factors correlated with the risk of death in NP patients. Notably, increased mortality was linked to the number of failed organs. CONCLUSIONS: NP is a potentially fatal disease with a long hospital or ICU stay. Our study indicated that the incidence of OF and death in NP patients was 69.9% and 10.2%, respectively. BMI, SAP, APACHE II score, age and shock are potential risk factors of OF and death in NP patients. Clinicians should focus on these factors for early diagnosis and appropriate therapy.


Asunto(s)
Pancreatitis Aguda Necrotizante , Humanos , Enfermedad Aguda , APACHE , Pronóstico , Factores de Riesgo , Estudios Retrospectivos
4.
Biomed Eng Online ; 21(1): 42, 2022 Jun 27.
Artículo en Inglés | MEDLINE | ID: mdl-35761289

RESUMEN

BACKGROUND: It is known that inflammatory bowel disease is the result of a defective immune system, and immunotherapy and biological therapy have gradually become important means to treat it. This paper focused on the bibliometric statistical analysis of the current research progress to summarize the research status of this field and analyze the research trends in recent years. METHODS: Two visualization tools, CiteSpace and VOSviewer, were used to explore the data of journals, institutions, countries/regions, authors, references, and keywords for the literature included in the Web of Science Core Collection from January 1, 2002, to December 31, 2021. RESULTS: A total of 312 papers were published in 120 journals by 603 institutions from 40 countries/regions, with 9463 co-cited references. The United States has the most publications with the highest total citations in the world. Inflammatory Bowel Diseases published the maximum number of papers, and Gastroenterology devoted the most co-citations to immunotherapy and biological therapy for IBD. In addition, we found that the studies before 2009 mostly focused on clinical trials while researchers have paid more attention to clinical management in therapy for IBD since 2009. Combination therapy and management of the treatment for the disease have become research hotspots. CONCLUSION: The focus of immunotherapy and biotherapy for IBD has shifted from clinical trials to the management of the risks and benefits of immunotherapy.


Asunto(s)
Bibliometría , Enfermedades Inflamatorias del Intestino , Terapia Biológica , Humanos , Inmunoterapia , Enfermedades Inflamatorias del Intestino/terapia , Publicaciones
5.
Phytother Res ; 36(7): 2940-2951, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35537702

RESUMEN

Angiogenesis plays a pivotal role in the recovery of neurological function after ischemia stroke. Herein, we investigated the effect of trilobatin (TLB) on angiogenesis after cerebral ischemia-reperfusion injury (CIRI). The effect of TLB on angiogenesis after CIRI were investigated in mouse brain microvascular endothelium bEnd.3 cells and middle cerebral artery occlusion (MCAO)-induced CIRI rat model. The cell proliferation and angiogenesis were observed using immunofluorescence staining. The cell cycle, expressions of cell cycle-related proteins and SIRT 1-7 were determined by flow cytometry and western blot, respectively. The binding affinity of TLB with SIRT7 was predicted by molecular docking. The results showed that TLB concentration-dependently promoted bEnd.3 cell proportion in the S-phase. TLB significantly increased the protein expressions of SIRT6, SIRT7, and VEGFA, but not affected SIRT1-SIRT5 protein expressions. Moreover, TLB not only dramatically alleviated neurological impairment after CIRI, but also enhanced post-stroke neovascularization and newly formed functional vessels in cerebral ischemic penumbra. Furthermore, TLB up-regulated the protein expressions of CDK4, cyclin D1, VEGFA and its receptor VEGFR-2. Intriguingly, TLB not only directly bound to SIRT7, but also increased SIRT7 expression at day 28. Our findings reveal that TLB promotes cerebral microvascular endothelial cells proliferation, and facilitates angiogenesis after CIRI via mediating SIRT7/VEGFA signaling pathway in rats. Therefore, TLB might be a novel restorative agent to rescue ischemia stroke.


Asunto(s)
Flavonoides , Polifenoles , Daño por Reperfusión , Sirtuinas , Animales , Células Endoteliales/metabolismo , Flavonoides/farmacología , Ratones , Simulación del Acoplamiento Molecular , Neovascularización Patológica , Polifenoles/farmacología , Ratas , Ratas Sprague-Dawley , Daño por Reperfusión/tratamiento farmacológico , Transducción de Señal , Sirtuinas/metabolismo , Factor A de Crecimiento Endotelial Vascular
6.
J Cell Mol Med ; 25(6): 2806-2815, 2021 03.
Artículo en Inglés | MEDLINE | ID: mdl-33538080

RESUMEN

We have previously shown that adenine monophosphate-activated protein kinase (AMPK) regulates transforming growth factor ß (TGF-ß)-triggered Smad3 phosphorylation. Here we report that AMPK inhibits TGF-ß1 production. First, metformin reduced mRNA levels of TGF-ß1 in gastric cancer cells, in parallel to the decrease of its protein abundance. The effects were more prominent in the cells containing LKB1, an upstream kinase of AMPK. Second, knockdown of Smad3 by siRNA abrogated the expression of TGF-ß1. Third, metformin suppressed firefly luciferase activity whose transcription was driven by TGF-ß1 promoter. In accordance, deletion of the putative binding site of Smad3 in the TGF-ß1 promoter region severely impaired the promoter activity and response to metformin. Fourth, in support of our in vitro study, clinical treatment of type 2 diabetes with metformin significantly reduced the plasma level of TGF-ß1. Finally, immunohistochemical studies revealed that TGF-ß1 was highly expressed in human gastric cancer tissues as compared with adjacent normal tissues. In contrast, p-AMPK exhibited opposite changes. Furthermore, the survival rate of gastric cancer patients was positively correlated with p-AMPK and negative with TGF-ß1. Therefore, our present studies depict a mechanism underlying AMPK suppression of TGF-ß1 autoinduction, which is mediated through inhibition of Smad3 phosphorylation and activation. Collectively, our study sheds a light on the potential usage of AMPK activators in the treatment of TGF-ß1-mediated gastric cancer progression.


Asunto(s)
Proteínas Quinasas Activadas por AMP/metabolismo , Regulación Neoplásica de la Expresión Génica , Proteína smad3/metabolismo , Neoplasias Gástricas/etiología , Neoplasias Gástricas/metabolismo , Factor de Crecimiento Transformador beta1/genética , Células Cultivadas , Femenino , Regulación Neoplásica de la Expresión Génica/efectos de los fármacos , Humanos , Masculino , Metformina/farmacología , Regiones Promotoras Genéticas , Neoplasias Gástricas/patología , Factor de Crecimiento Transformador beta1/sangre , Factor de Crecimiento Transformador beta1/metabolismo
7.
J Cell Mol Med ; 24(24): 14491-14501, 2020 12.
Artículo en Inglés | MEDLINE | ID: mdl-33169942

RESUMEN

AMP-activated protein kinase (AMPK) is an intracellular sensor of energy homoeostasis that is activated under energy stress and suppressed in energy surplus. AMPK activation leads to inhibition of anabolic processes that consume ATP. Osteogenic differentiation is a process that highly demands ATP during which AMPK is inhibited. The bone morphogenetic proteins (BMPs) signalling pathway plays an essential role in osteogenic differentiation. The present study examines the inhibitory effect of metformin on BMP signalling, osteogenic differentiation and trauma-induced heterotopic ossification. Our results showed that metformin inhibited Smad1/5 phosphorylation induced by BMP6 in osteoblast MC3T3-E1 cells, concurrent with up-regulation of Smad6, and this effect was attenuated by knockdown of Smad6. Furthermore, we found that metformin suppressed ALP activity and mineralization of the cells, an event that was attenuated by the dominant negative mutant of AMPK and mimicked by its constitutively active mutant. Finally, administration of metformin prevented the trauma-induced heterotopic ossification in mice. In conjuncture, AMPK activity and Smad6 and Smurf1 expression were enhanced by metformin treatment in the muscle of injured area, concurrently with the reduction of ALK2. Collectively, our study suggests that metformin prevents heterotopic ossification via activation of AMPK and subsequent up-regulation of Smad6. Therefore, metformin could be a potential therapeutic drug for heterotopic ossification induced by traumatic injury.


Asunto(s)
Proteínas Morfogenéticas Óseas/metabolismo , Metformina/farmacología , Osificación Heterotópica/etiología , Osificación Heterotópica/metabolismo , Transducción de Señal/efectos de los fármacos , Heridas y Lesiones/complicaciones , Proteínas Quinasas Activadas por AMP/metabolismo , Animales , Diferenciación Celular/efectos de los fármacos , Femenino , Inmunohistoquímica , Ratones , Osificación Heterotópica/diagnóstico por imagen , Osificación Heterotópica/tratamiento farmacológico , Osteoblastos/citología , Osteoblastos/metabolismo , Osteogénesis/efectos de los fármacos , Microtomografía por Rayos X
8.
J Cell Mol Med ; 23(6): 3951-3961, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-30993829

RESUMEN

Adenine monophosphate-activated protein kinase (AMPK) is a fuel sensing enzyme that is activated in shortage of energy and inhibited in its surplus. Cancer is a metabolic disease characteristic of aerobic glycolysis, namely Warburg effect, and possesses heterogeneity featured by spatiotemporal hypoxia and normoxia, where AMPK is deeply implicated. The present study delineates the regulation of mitochondrial functions by AMPK in cancer cells. On the one hand, AMPKα subunit binds to mitochondria independently of ß subunit and targeting AMPK to mitochondria facilitates oxidative phosphorylation and fatty acid oxidation, and inhibits glycolysis. As such, mitochondrial AMPK inhibits the growth of cancer cells and tumorigenesis. On the other hand, ablation of the ß subunits completely abolishes AMPK activity and simultaneously leads to decreases in mitochondria DNA and protein contents. The effect of the ß deletion is rescued by overexpression of the active mutant of bulky AMPKα1 subunit. In conjunction, the transcriptional factors PGC1α and Nrf-1 are up-regulated by LKB1/AMPK, an event that is abolished in the absence of the ß subunits. Intriguingly, the stimulation of mitochondria biogenesis is not achieved by mitochondria-targeted AMPK. Therefore, our study suggests that AMPK inhibits cancer cell growth and tumorigenesis via regulation of mitochondria-mediated metabolism.


Asunto(s)
Proteínas Quinasas Activadas por AMP/metabolismo , Carcinogénesis/metabolismo , Núcleo Celular/metabolismo , Mitocondrias/metabolismo , Células A549 , Proteínas Quinasas Activadas por AMP/genética , Animales , Carcinogénesis/genética , Núcleo Celular/genética , Transformación Celular Neoplásica/genética , Transformación Celular Neoplásica/metabolismo , Glucólisis/genética , Células HEK293 , Humanos , Ratones , Ratones Desnudos , Mitocondrias/genética , Oxidación-Reducción , Fosforilación Oxidativa , Coactivador 1-alfa del Receptor Activado por Proliferadores de Peroxisomas gamma/genética , Coactivador 1-alfa del Receptor Activado por Proliferadores de Peroxisomas gamma/metabolismo , Ratas , Trasplante Heterólogo , Trasplante Homólogo
9.
Biochim Biophys Acta Mol Cell Res ; 1864(12): 2369-2377, 2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-28847510

RESUMEN

Activin A receptor type I or activin receptor-like kinase 2 (ACVRI/ALK2) belongs to type I TGF-ß family and plays an important role in bone development. Activating mutations of ALK2 containing the R206 to H mutation, are present in 95% in the rare autosomal genetic disease fibrodysplasia ossificans progressiva (FOP), which leads to the development of ectopic bone formation in muscle. The effect of AMP-activated protein kinase (AMPK) activation on ALK2R206H-mediated signaling in fibroblasts obtained from a FOP patient was assessed in the present study. The activity of the mutated ALK2 was suppressed by pharmacological AMPK activators such as metformin and aspirin, while their actions were blocked by the dominant negative mutant of AMPK and mimicked by the constitutively active mutant of AMPK. Furthermore, activation of AMPK upregulated Smad6 and Smurf1 and thereby enhanced their interactions, resulting in its proteosome-dependent degradation of ALK2. In contrast, knockdown of Smad6 or Smurf1 prevented metformin-induced reduction of ALK2. To evaluate the biological relevance of AMPK action on ALK2 activity, we induced FOP fibroblasts into iPS cells and found that their osteogenic differentiation in vitro was inhibited by metformin. Our studies provide novel insight into potential approaches to treatment of FOP, since several AMPK activators (e.g. metformin, berberine, and aspirin) are already in clinical use for the treatment of diabetes and metabolic syndromes.


Asunto(s)
Receptores de Activinas Tipo I/genética , Miositis Osificante/genética , Proteínas Quinasas/genética , Proteína smad6/genética , Ubiquitina-Proteína Ligasas/genética , Quinasas de la Proteína-Quinasa Activada por el AMP , Diferenciación Celular/genética , Fibroblastos/metabolismo , Regulación del Desarrollo de la Expresión Génica/efectos de los fármacos , Técnicas de Silenciamiento del Gen , Humanos , Células Madre Pluripotentes Inducidas/metabolismo , Metformina/administración & dosificación , Mutación , Miositis Osificante/patología , Osteogénesis/genética , Transducción de Señal/efectos de los fármacos
10.
Cell Biol Int ; 42(4): 384-392, 2018 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-29205673

RESUMEN

AMP-activated protein kinase (AMPK) is a conserved sensor of cellular energy change and is activated by increased AMP/ATP and/or ADP/ATP ratios. AMPK maintains the energy balance by decreasing the ATP-consuming processes such as transcription of synthetic fat genes and rRNA, the translation of ribosomal proteins, synthesis of cholesterol and fatty acid, while the metabolic pathways such as glucose and fatty transport, fatty acid oxidation, autophagy, mitochondrial synthesis and oxidative metabolism are increased to preserve ATP during energy deficiency. Recent advance has demonstrated that AMPK activity has a close association with the initiation and progression in various cancers. Here we review the mechanisms that AMPK controls energy metabolism through regulating ATP synthesis and consumption, and further discuss the deregulation of AMPK in cancers.


Asunto(s)
Proteínas Quinasas Activadas por AMP/metabolismo , Proteínas Quinasas Activadas por AMP/fisiología , Adenosina Trifosfato/metabolismo , Animales , Metabolismo Energético/fisiología , Ácidos Grasos/metabolismo , Glucosa/metabolismo , Transportador de Glucosa de Tipo 4/genética , Transportador de Glucosa de Tipo 4/metabolismo , Humanos , Metabolismo de los Lípidos , Oxidación-Reducción , Fosforilación , Factores de Transcripción/metabolismo
11.
Arch Gynecol Obstet ; 297(2): 333-339, 2018 02.
Artículo en Inglés | MEDLINE | ID: mdl-29164335

RESUMEN

PURPOSE: Acute pancreatitis in pregnancy (APIP) is a rare condition; however, it markedly affects maternal and fetal health. This study aimed to describe the types, clinical characteristics, mortality, and the safety and necessity of gestation termination of acute pancreatitis in pregnancy (APIP). METHODS: We retrospectively reviewed 121 APIP cases in the Gastroenterology Department of The First Affiliated Hospital of Nanchang University. APIP diagnosis were based on 2012 Atlanta Criteria. The correlation between APIP types, severity, biochemical parameters and mortality was analyzed. RESULTS: The most common symptoms for APIP were abdominal pain (86.8%) and vomiting (73.6%). The most common causes for APIP were gallstone (36.4%) and hypertriglyceridemia (32.2%) and hypertriglyceridemic APIP was correlated with a higher rate for local complication (P = 0.012). Serum calcium level was negatively correlated with the severity of APIP (P < 0.01). The overall maternal and fetal mortality rate were 3.3% (4/121) and 11.6% (14/121), respectively. The severity of APIP was significantly correlated with higher risks for maternal and fetal death (P < 0.01). 72.7% of moderate-to-severe APIP patients underwent Cesarean section to terminate gestation safely. CONCLUSION: The most common causes of APIP were gallstone and hypertriglyceridemia. Lower level of serum calcium could be used as an indicator for the severity of the APIP. The severity of APIP was associated with higher risk for neonate asphyxia, and maternal and fetal death.


Asunto(s)
Calcio/sangre , Muerte Fetal , Hipertrigliceridemia/complicaciones , Pancreatitis/etiología , Complicaciones del Embarazo/diagnóstico , Dolor Abdominal/etiología , Enfermedad Aguda , Adulto , Cesárea/efectos adversos , China/epidemiología , Femenino , Cálculos Biliares , Humanos , Hiperlipidemias/complicaciones , Hipertrigliceridemia/sangre , Recién Nacido , Pancreatitis/mortalidad , Pancreatitis/terapia , Embarazo , Complicaciones del Embarazo/mortalidad , Complicaciones del Embarazo/terapia , Resultado del Embarazo , Estudios Retrospectivos , Índice de Severidad de la Enfermedad , Vómitos/etiología
12.
Tumour Biol ; 39(4): 1010428317697576, 2017 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-28381161

RESUMEN

Adenosine monophosphate-activated protein kinase (AMPK), a serine/threonine protein kinase, is known as "intracellular energy sensor and regulator." AMPK regulates multiple cellular processes including protein and lipid synthesis, cell proliferation, invasion, migration, and apoptosis. Moreover, AMPK plays a key role in the regulation of "Warburg effect" in cancer cells. AMPK activity is down-regulated in most tumor tissues compared with the corresponding adjacent paracancerous or normal tissues, indicating that the decline in AMPK activity is closely associated with the development and progression of cancer. Therefore, understanding the mechanism of AMPK deactivation during cancer progression is of pivotal importance as it may identify AMPK as a valid therapeutic target for cancer treatment. Here, we review the mechanisms by which AMPK is down-regulated in cancer.


Asunto(s)
Proteínas Quinasas Activadas por AMP/fisiología , Neoplasias/etiología , Proteínas Quinasas Activadas por AMP/química , Proteínas Quinasas Activadas por AMP/genética , Acetilación , Regulación hacia Abajo , Humanos , MicroARNs/fisiología , Neoplasias/enzimología , Fosforilación , Procesamiento Proteico-Postraduccional , Ubiquitinación
13.
Tumour Biol ; 37(6): 8249-58, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-26718214

RESUMEN

Adenosine monophosphate-activated protein kinase (AMPK) acts as a fuel gauge that maintains energy homeostasis in both normal and cancerous cells, and has emerged as a tumor suppressor. The present study aims to delineate the functional relationship between AMPK and transforming growth factor beta (TGF-ß). Our results showed that expression of liver kinase B1 (LKB1), an upstream kinase of AMPK, impeded TGF-ß-induced Smad phosphorylation and their transcriptional activity in breast cancer cells, whereas knockdown of LKB1 or AMPKα1 subunit by short hairpin RNA (shRNA) enhanced the effect of TGF-ß. Furthermore, AMPK activation reduced the promoter activity of TGF-ß1. In accordance, type 2 diabetic patients taking metformin displayed a trend of reduction of serum TGF-ß1, as compared with those without metformin. A significant reduction of serum TGF-ß1 was found in mice after treatment with metformin. These results suggest that AMPK inhibits the transcription of TGF-ß1, leading to reduction of its concentration in serum. Finally, metformin suppressed epithelial-to-mesenchymal transition of mammary epithelial cells. Taken together, our study demonstrates that AMPK exerts multiple actions on TGF-ß signaling and supports that AMPK can serve as a therapeutic drug target for breast cancer.


Asunto(s)
Proteínas Quinasas Activadas por AMP/genética , Neoplasias de la Mama/tratamiento farmacológico , Hipoglucemiantes/farmacología , Metformina/farmacología , Proteínas Serina-Treonina Quinasas/genética , Factor de Crecimiento Transformador beta1/metabolismo , Quinasas de la Proteína-Quinasa Activada por el AMP , Anciano , Animales , Western Blotting , Neoplasias de la Mama/metabolismo , Línea Celular Tumoral , Movimiento Celular/efectos de los fármacos , Transición Epitelial-Mesenquimal/efectos de los fármacos , Transición Epitelial-Mesenquimal/genética , Femenino , Técnica del Anticuerpo Fluorescente , Humanos , Masculino , Ratones , Ratones Endogámicos BALB C , Persona de Mediana Edad , ARN Interferente Pequeño , Reacción en Cadena en Tiempo Real de la Polimerasa , Transducción de Señal , Células Tumorales Cultivadas/efectos de los fármacos , Células Tumorales Cultivadas/metabolismo , Cicatrización de Heridas
14.
Mol Pharmacol ; 88(6): 1062-71, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26424816

RESUMEN

AMP-activated protein kinase (AMPK), an important downstream effector of the tumor suppressor liver kinase 1 (LKB1) and pharmacologic target of metformin, is well known to exert a preventive and inhibitory effect on tumorigenesis; however, its role in cancer progression and metastasis has not been well characterized. The present study investigates the potential roles of AMPK in inhibiting cancer-cell migration and epithelial-to-mesenchymal transition (EMT) by regulating the canonical transforming growth factor ß (TGF-ß) signaling pathway, an important promoting factor for cancer progression. Our results showed that activation of AMPK by metformin inhibited TGF-ß-induced Smad2/3 phosphorylation in cancer cells in a dose-dependent manner. The effect of metformin is dependent on the presence of LKB1. A similar effect was obtained by expressing a constitutive active mutant of AMPKα1 subunit, whereas the expression of a dominant negative mutant of AMPKα1 or ablation of AMPKα subunits greatly enhanced TGF-ß stimulation of Smad2/3 phosphorylation. As a consequence, expression of genes downstream of Smad2/3, including plasminogen activator inhibitor-1, fibronectin, and connective tissue growth factor, was suppressed by metformin in a LKB1-dependent fashion. In addition, metformin blocked TGF-ß-induced inteleukin-6 expression through both LKB1-dependent and -independent mechanisms. Our results also indicate that activation of LKB1/AMPK inhibits TGF-ß-stimulated cancer cell migration. Finally, TGF-ß induction of EMT was inhibited by phenformin and enhanced by knockdown of LKB1 expression with shRNA. Together, our data suggest that AMPK could be a drug target for controlling cancer progression and metastasis.


Asunto(s)
Proteínas Quinasas Activadas por AMP/metabolismo , Movimiento Celular/fisiología , Transición Epitelial-Mesenquimal/fisiología , Proteína Smad2/metabolismo , Proteína smad3/metabolismo , Factor de Crecimiento Transformador beta/farmacología , Animales , Línea Celular Tumoral , Movimiento Celular/efectos de los fármacos , Transición Epitelial-Mesenquimal/efectos de los fármacos , Humanos , Ratones , Fosforilación/efectos de los fármacos , Fosforilación/fisiología , Proteína Smad2/antagonistas & inhibidores , Proteína smad3/antagonistas & inhibidores , Factor de Crecimiento Transformador beta/antagonistas & inhibidores
15.
Tumour Biol ; 35(9): 8379-85, 2014 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-24935472

RESUMEN

In the context of cancer, transforming growth factor ß (TGF-ß) is a cell growth suppressor; however, it is also a critical inducer of invasion and metastasis. SMAD is the important mediator of TGF-ß signaling pathway, which includes receptor-regulated SMADs (R-SMADs), common-mediator SMADs (co-SMADs), and inhibitory SMADs (I-SMADs). I-SMADs block the activation of R-SMADs and co-SMADs and thus play important roles especially in the SMAD-dependent signaling. SMAD7 belongs to the I-SMADs. As an inhibitor of TGF-ß signaling, SMAD7 is overexpressed in numerous cancer types and its abundance is positively correlated to the malignancy. Emerging evidence has revealed the switch-in-role of SMAD7 in cancer, from a TGF-ß inhibiting protein at the early stages that facilitates proliferation to an enhancer of invasion at the late stages. This role change may be accompanied or elicited by the tumor microenvironment and/or somatic mutation. Hence, current knowledge suggests a tumor-favorable timer nature of SMAD7 in cancer progression. In this review, we summarized the advances and recent findings of SMAD7 and TGF-ß signaling in cancer, followed by specific discussion on the possible factors that account for the functional changes of SMAD7.


Asunto(s)
Neoplasias/metabolismo , Transducción de Señal , Proteína smad7/metabolismo , Factor de Crecimiento Transformador beta/metabolismo , Animales , Progresión de la Enfermedad , Humanos , Modelos Biológicos , Neoplasias/patología , Factores de Tiempo
16.
World J Gastrointest Oncol ; 16(1): 118-132, 2024 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-38292835

RESUMEN

BACKGROUND: The TGF-ß/SMAD3 and VEGFR-1 signaling pathways play important roles in gastric cancer metastasis. SMAD3 phosphorylation is a crucial prognostic marker in gastric cancer. AIM: To determine the prognostic value and relationship of SMAD3 phospho-isoforms and VEGFR-1 in gastric cancer. METHODS: This was a single-center observational study which enrolled 98 gastric cancer patients and 82 adjacent normal gastric tissues from patients aged 32-84 years (median age 65) between July 2006 and April 2007. Patients were followed up until death or the study ended (median follow-up duration of 28.5 mo). The samples were used to generate tissue microarrays (TMAs) for immunohistochemical (IHC) staining. The expressions of TGF-ß1, pSMAD3C(S423/425), pSMAD3L(S204), and VEGFR-1 in gastric cancer (GC) tumor tissue and normal tissue were measured by IHC staining using TMAs obtained from 98 GC patients. Prognosis and survival information of the patients was recorded by Outdo Biotech from May 2007 to July 2015. The relationship between TGF-ß1, pSMAD3C(S423/425), pSMAD3L(S204), and VEGFR-1 protein expression levels was analyzed using Pearson's correlation coefficient. The relationship between protein expression levels and clinicopathological parameters was analyzed using the Chi-squared test. A survival curve was generated using the Kaplan-Meier survival analysis. RESULTS: TGFß-1 and VEGFR-1 expression was significantly upregulated in gastric cancer tissue compared to adjacent non-cancerous tissue. The positive expression of phosphorylated isoforms of Smad3 varied depending on the phosphorylation site [pSMAD3C(S423/425): 51.0% and pSMAD3L(S204): 31.6%]. High expression of pSMAD3L(S204) was significantly correlated with larger tumors (P = 0.038) and later N stages (P = 0.035). Additionally, high expression of VEGFR-1 was closely correlated with tumor size (P = 0.015) and pathological grading (P = 0.013). High expression of both pSMAD3L(S204) and VEGFR-1 was associated with unfavorable outcomes in terms of overall survival (OS). Multivariate analysis indicated that high expression of pSMAD3L(S204) and VEGFR-1 were independent risk factors for prognosis in GC patients. VEGFR-1 protein expression was correlated with TGF-ß1 (r = 0.220, P = 0.029), pSMAD3C(S423/425) (r = 0.302, P = 0.002), and pSMAD3L(S204) (r = 0.201, P = 0.047), respectively. Simultaneous overexpression of pSMAD3L(S204) and VEGFR-1 was associated with poor OS in gastric cancer patients. CONCLUSION: Co-upregulation of pSMAD3L(S204) and VEGFR-1 can serve as a predictive marker for poor gastric cancer prognosis, and pSMAD3L(204) may be involved in enhanced gastric cancer metastasis in a VEGFR-1-dependent manner.

17.
Heliyon ; 10(1): e23731, 2024 Jan 15.
Artículo en Inglés | MEDLINE | ID: mdl-38187341

RESUMEN

Background: Inflammation and lipids are both involved in the pathogenesis of coronary heart disease (CHD). However, the mediation effect of lipoproteins on the association between inflammation and recurrent coronary events in CHD patients remains unclear. Methods: This was a retrospective study including CHD patients hospitalized in the Department of Cardiovascular Medicine in Sun Yat-sen Memorial Hospital between January 2011 and December 2012 with the endpoint of recurrent coronary events. The study calculated inflammatory score based on six serum inflammatory markers, including complement C3, complement C4, hyper-sensitive CRP, fibrinogen, D-dimer, and white blood cell count. Logistic regression analysis, subgroup analysis and mediation analysis were performed to assess the associations between inflammatory score and recurrent coronary events in different subpopulations and the identification of mediators. Inflammatory cytokine expression, cholesterol efflux capacity, and hepatic cholesterol influx were performed in additional CHD patients and healthy controls. Results: There were 191 CHD patients included in the analysis with a median inflammatory score of -0.78 (-2.17, 1.35) and 63 cases of recurrent coronary events. Subgroup logistic regression analysis demonstrated that inflammatory score was positively associated with recurrent coronary events only in the diabetic subgroup [OR: 1.241 (1.004, 1.534), P < 0.046]. HDL-cholesterol (HDL-C): non-HDL-C performed 46.74 % of negative mediation effect on this association. CHD patients had lower cholesterol efflux capacity than healthy controls, which was mediated by HDL: non-HDL ratio of 0.4. No difference was found in hepatic cholesterol influx between the two groups. Conclusion: Inflammatory score was associated with recurrent coronary events mediated by HDL-C: non-HDL-C ratio in diabetic CHD patients, indicating that lipoproteins might aggravate the inflammatory effect on atherosclerosis under hyperglycemia. Our findings suggested that anti-inflammatory and lipid-lowering therapies might be beneficial for this population.

18.
Front Physiol ; 14: 1281342, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-38028764

RESUMEN

Background: Electrogastrogram (EGG) can reflect gastric motility disorders in many diseases, but its application in acute pancreatitis (AP) has not been studied. Therefore, our study aimed to investigate the value of EGG in assessing the existence of gastric motility disorder in patients with AP and in predicting the severity of AP. Methods: Patients with AP admitted to the First Affiliated Hospital of Nanchang University from June 2020 to December 2020 were enrolled. Five EGG parameters (Percentage of normal gastric slow wave (PNGSW), main frequency, average frequency, percentage of gastric tachycardia (PGT), percentage of gastric bradycardia (PGB)) were collected. The receiver operating characteristic (ROC) curve was constructed to judge the predictive value of EGG parameters to AP severity. Results: The PNGSW in AP patients was significantly lower than that of the control group (p < 0.05), and the PGB was higher in AP patients than that of the control group (p < 0.05). The area under curve (AUC) of the PNGSW and the PGB in diagnosing non-mild acute pancreatitis (N-MAP) were 0.777 (95% CI: 0.676-0.877, p < 0.001) and 0.775 (95% CI: 0.670-0.879, p < 0.001) respectively. After combining with C-reactive protein, the accuracy, sensitivity and specificity of predicting N-MAP were improved. Conclusion: EGG parameters can well reflect the gastric motility disorder of AP patients. The PNGSW and the PGB can be used to predict the occurrence of N-MAP.

19.
Medicine (Baltimore) ; 102(31): e34515, 2023 Aug 04.
Artículo en Inglés | MEDLINE | ID: mdl-37543804

RESUMEN

The purpose of this study was to evaluate the association between the waist-to-height ratio (WHtR) and the aggravation of acute pancreatitis (AP). This prospective study included AP patients treated from May 2019 to December 2019 in the Department of Gastroenterology, the First Affiliated Hospital of Nanchang University. Receiver operating characteristic curves were constructed to determine the optimal threshold values for predicting the aggravation of AP. Risk factor analysis was performed via logistic regression analysis. Of 258 patients included in this study, 77 (29.84%) were diagnosed with mild acute pancreatitis, 120 (46.51%) with moderately severe acute pancreatitis, and 61 (23.64%) with severe acute pancreatitis (SAP). WHtR, waist circumference, weight, and body mass index were all associated with AP severity, and the highest area under the receiver operating characteristic value was observed for WHtR. The optimal threshold WHtR value for predicting SAP was 0.567. Multivariate logistic regression analysis identified WHtR ≥ 0.567 as independent risk factor for SAP. Moreover, the hospital stay was longer and intensive care unit admission rate was higher among AP patients with a WHtR ≥ 0.567. The WHtR was found to be closely related to the severity of AP and an independent risk factor for the aggravation of AP. This simple parameter can aid the early prediction of AP progression, thereby facilitating early intervention and improving patient outcomes.


Asunto(s)
Pancreatitis , Humanos , Pancreatitis/diagnóstico , Enfermedad Aguda , Estudios Prospectivos , Índice de Severidad de la Enfermedad , Factores de Riesgo
20.
Int J Oncol ; 63(5)2023 11.
Artículo en Inglés | MEDLINE | ID: mdl-37654200

RESUMEN

Salt inducible kinases (SIKs) with three subtypes SIK1, SIK2 and SIK3, belong to the AMP­activated protein kinase family. They are expressed ubiquitously in humans. Under normal circumstances, SIK1 regulates adrenocortical function in response to high salt or adrenocorticotropic hormone stimulation, SIK2 is involved in cell metabolism, controlling insulin signaling and gluconeogenesis and SIK3 coordinates with the mTOR complex, promoting cancer. The dysregulation of SIKs has been widely detected in various types of cancers. Based on most of the existing studies, SIK1 is mostly considered a tumor inhibitor, SIK2 and SIK3 are usually associated with tumor promotion. However, the functions of SIKs have shown contradictory in certain tumors, suggesting that SIKs cannot be simply classified as oncogenes or tumor suppressor genes. The present review provided a comprehensive summary of the roles of SIKs in the initiation and progression of different cancers, aiming to elucidate their clinical value and discuss potential strategies for targeting SIKs in cancer therapy.


Asunto(s)
Neoplasias , Oncogenes , Humanos , Neoplasias/genética , Proteínas Quinasas Activadas por AMP , Transformación Celular Neoplásica
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