RESUMEN

Uptaking particulate objects and bulk liquid by eucaryotic cells is critical for their growth, survival, and defense. Dictyostelium is a model organism spearheaded to uncover mechanisms behind various types of uptaking activities. Here, we describe assays measuring phagocytosis and macropinocytosis using Dictyostelium discoideum.

Asunto(s)

Dictyostelium , Fagocitosis , Pinocitosis , Dictyostelium/fisiología , Pinocitosis/fisiología

RESUMEN

BACKGROUND: The purpose of this prospective study was to evaluate the association of systemic immune-inflammation index (SII) and systemic inflammation response index (SIRI), with PSCI in patients with acute ischemic stroke (AIS). METHODS: First-onset AIS patients were consecutively included from January 1, 2022 to March 1, 2023. The baseline information was collected at admission. Fasting blood was drawn the next morning. Cognitive function was assessed by the Montreal Cognitive Assessment (MoCA) 3 months after onset. Logistic regression analysis was performed to explore the correlation between SII, SIRI, and PSCI. Receiver operating characteristic (ROC) was conducted to evaluate the predictive ability of SII. RESULTS: 332 participants were recruited, and 193 developed PSCI. Compared with patients without PSCI, the patients with PSCI had higher SII (587.75 (337.42, 988.95) vs. 345.66 (248.44, 572.89), P<0.001) and SIRI (1.59 (0.95, 2.84) vs. 1.02 (0.63, 1.55), P=0.007). SII and SIRI negatively correlated with MoCA scores (both P<0.05). The multivariable logistic regression analysis indicated that SII was independently associated with PSCI (P<0.001), while SIRI was not. The optimal cutoff for SII to predict PSCI was 676.83×109/L. CONCLUSIONS: A higher level of SII upon admission was independently correlated to PSCI three months later in AIS patients.

Asunto(s)

Disfunción Cognitiva , Inflamación , Accidente Cerebrovascular Isquémico , Humanos , Masculino , Femenino , Accidente Cerebrovascular Isquémico/inmunología , Accidente Cerebrovascular Isquémico/complicaciones , Accidente Cerebrovascular Isquémico/sangre , Disfunción Cognitiva/etiología , Disfunción Cognitiva/sangre , Disfunción Cognitiva/inmunología , Anciano , Persona de Mediana Edad , Estudios Prospectivos , Inflamación/inmunología , Inflamación/sangre , Pruebas de Estado Mental y Demencia

RESUMEN

BACKGROUND: Post-stroke cognitive impairment (PSCI) is a very common complication of ischemic stroke (IS). Triglyceride-glucose (TyG) index was an effective alternative marker of insulin resistance (IR). This prospective study was designed to explore the correlation between TyG index and PSCI. METHODS: Between January 1 2021 to June 30 2022, consecutive patients with first onset IS were enrolled prospectively. Baseline information was collected at admission and fasting blood was drawn the next morning. Montreal Cognitive Assessment (MoCA) was used to evaluate cognitive function at three months after stroke. Multiple regression analysis was used to explore the correlation between PSCI and TyG. Receiver operating characteristic (ROC) was performed to evaluate the predictive ability. RESULTS: Ultimately, 313 patients were enrolled in this study. The TyG index was higher in patients with PSCI than those without PSCI (8.99 (8.55, 9.54) vs. 8.61(8.25, 8.87), P<0.001). The spearman correlation analysis indicated that TyG index was negatively correlated with MoCA score (r=-0.272, P<0.001). The multivariate logistic regression analysis demonstrated that TyG index was correlated with PSCI independently (P<0.001) regardless of whether the patients had diabetes or not. The area under curve (AUC) of the ROC was 0.684 (95%CI=0.635-0.768, P<0.001). The optimal cutoff value of TyG index for predicting PSCI was 8.81, with a sensitivity of 61.7% and a specificity of 73.6%. CONCLUSION: A higher TyG index level at admission was independently correlated with increased risk of PSCI three months later and could be used as a predictor.

Asunto(s)

Disfunción Cognitiva , Accidente Cerebrovascular Isquémico , Accidente Cerebrovascular , Humanos , Accidente Cerebrovascular Isquémico/complicaciones , Estudios Prospectivos , Triglicéridos , Accidente Cerebrovascular/complicaciones , Accidente Cerebrovascular/diagnóstico , Disfunción Cognitiva/diagnóstico , Disfunción Cognitiva/etiología , Glucosa , Biomarcadores , Glucemia

RESUMEN

BACKGROUND: Protein aggregates are considered key pathological features in neurodegenerative diseases (NDs). The induction of autophagy can effectively promote the clearance of ND-related misfolded proteins. OBJECTIVE: In this study, we aimed to screen natural autophagy enhancers from traditional Chinese medicines (TCMs) presenting potent neuroprotective potential in multiple ND models. METHODS: The autophagy enhancers were broadly screened in our established herbal extract library using the transgenic Caenorhabditis elegans (C. elegans) DA2123 strain. The neuroprotective effects of the identified autophagy enhancers were evaluated in multiple C. elegans ND models by measuring Aß-, Tau-, α-synuclein-, and polyQ40-induced pathologies. In addition, PC-12 cells and 3 × Tg-AD mice were employed to further validate the neuroprotective ability of the identified autophagy enhancers, both in vitro and in vivo. Furthermore, RNAi bacteria and autophagy inhibitors were used to evaluate whether the observed effects of the identified autophagy enhancers were mediated by the autophagy-activated pathway. RESULTS: The ethanol extract of Folium Hibisci Mutabilis (FHME) was found to significantly increase GFP::LGG-1-positive puncta in the DA2123 worms. FHME treatment markedly inhibited Aß, α-synuclein, and polyQ40, as well as prolonging the lifespan and improving the behaviors of C. elegans, while siRNA targeting four key autophagy genes partly abrogated the protective roles of FHME in C. elegans. Additionally, FHME decreased the expression of AD-related proteins and restored cell viability in PC-12 cells, which were canceled by cotreatment with 3-methyladenine (3-MA) or bafilomycin A1 (Baf). Moreover, FHME ameliorated AD-like cognitive impairment and pathology, as well as activating autophagy in 3 × Tg-AD mice. CONCLUSION: FHME was successfully screened from our natural product library as a potent autophagy enhancer that exhibits a neuroprotective effect in multiple ND models across species through the induction of autophagy. These findings offer a new and reliable strategy for screening autophagy inducers, as well as providing evidence that FHME may serve as a possible therapeutic agent for NDs.

Asunto(s)

Enfermedad de Alzheimer , Enfermedades Neurodegenerativas , Fármacos Neuroprotectores , Animales , Ratones , alfa-Sinucleína/metabolismo , Caenorhabditis elegans , Enfermedades Neurodegenerativas/tratamiento farmacológico , Animales Modificados Genéticamente , Fármacos Neuroprotectores/farmacología , Fármacos Neuroprotectores/uso terapéutico , Autofagia , Enfermedad de Alzheimer/tratamiento farmacológico

RESUMEN

BACKGROUND: Cognitive impairment after acute intracerebral hemorrhage (ICH) is common. While the evidence of early cognitive impairment at the acute stage after ICH is limited. We determined the frequency and risk factors of early cognitive impairment at the acute stage and investigated its association with delayed cognitive impairment after ICH. METHODS: A total of 208 patients with acute ICH were enrolled from January 2017 to February 2019. Cognitive function was assessed during the acute stage and at follow-up using Montreal Cognitive Assessment (MoCA) score. Significant cognitive impairment was defined as having a MoCA score <20 at the acute stage (within 1 week after hospital admission) or during follow-up. RESULTS: The mean observation period was 20 (IQC 17-23) months, and follow-up cognitive function data were collected from 185 patients. 89 (42.8%) and 86 (46.5%) patients had an acute stage and delayed significant cognitive impairment, respectively. Older age, large baseline hematoma volume, more severe ICH, and low level of education were significantly associated with significant cognitive impairment at the acute stage (all P ≤ 0.009). In the multivariable logistic regression model, the low MoCA score (odds ratio [OR] 0.59; 95% confidence interval [CI] 0.48-0.71; P<0.001) at the acute stage was independently associated with delayed significant cognitive impairment after ICH. CONCLUSION: Near half of the patients had significant cognitive impairment at the acute stage after ICH. Cognitive impairment is more frequent in the elderly, those with large baseline hematoma volume, and more severe initial neurological deficit. Having a lower MoCA score during the acute phase was independently associated with an increased risk of delayed cognitive impairment.

RESUMEN

Introduction: Genetically, complete hydatidiform mole (CHM) is androgenetic diploid, containing two sets of paternal chromosomes. In most cases, recurrent HM (RHM) is CHM but has diploid biparental chromosome constitution. Case report: We report a mother with RHM, both with biparental diploidy. The mother was compound heterozygous for two variants, c.1720dup, p.(C574Lfs*4) and c.2165A > G, p.(D722G) of the NLRP7 gene, as was a brother who fathered 2 normal pregnancies. Conclusion: The genotype study should be obtained for patients of CHM, even in their first pregnancy, followed by genetic screening for maternal-effect variants in those with biparental moles. This strategy will identify patients in their first pregnancy with HM that have a decreased chance for a normal pregnancy, to allow genetic counseling, perhaps utilizing a donor egg.

Asunto(s)

Enfermedad Trofoblástica Gestacional , Mola Hidatiforme , Neoplasias Uterinas , Proteínas Adaptadoras Transductoras de Señales/genética , Femenino , Humanos , Mola Hidatiforme/diagnóstico , Mola Hidatiforme/genética , Masculino , Recurrencia Local de Neoplasia , Padres , Embarazo , Neoplasias Uterinas/diagnóstico , Neoplasias Uterinas/genética

RESUMEN

ABSTRACT: Eyebrow is one of the most important features of the face; the absence of eyebrows will cause a heavy psychological burden to patients. Existing brow reconstruction techniques are not perfect for every case of eyebrow defect. In this study, a patient who suffered from eyebrows loss after radiotherapy for hemangioma underwent eyebrow reconstruction with the relay transfer of a temporal hairline flap. The entire procedure was performed in the outpatient operating room. The temporal hairline flap was transferred to the eyebrow region in a relay and survived well without necrosis. In the 2-month follow-up, the shape and density of the reconstructed eyebrows were satisfactory. The operation showed this technique was innovative, economic, and recommended as a suitable choice for eyebrow reconstruction, especially in those patients with poor hair transplantation recipient area.

Asunto(s)

Cejas , Procedimientos de Cirugía Plástica , Cabello , Humanos , Procedimientos de Cirugía Plástica/métodos , Trasplante de Piel , Colgajos Quirúrgicos

RESUMEN

ABSTRACT: Fat fixation is a key step in filling tear trough depression with inferior eyelid orbital septum fat. The ideal position for inferior eyelid fat fixation is to cross the tear trough ligament causing tear trough depression and the orbicularis retaining ligament, with the distal end fixed at the farthest end of the dissected lacuna deep down the inferior orbicularis oculi muscle. Traditional suturing is difficult in the deep narrow lacunae, but a buried guide needle can be used to suture and fix the fat in the deepest lacuna. In this study, 264 patients who underwent tear trough filling using a buried guide needle to fix the released inferior eyelid orbital septum fat from 2017 to 2020 were followed up. The preoperative and postoperative imaging findings were compared to evaluate the effectiveness of the operation and postoperative complications. The inferior eyelid bulging, loose skin, and tear trough depression significantly improved than that before the operation. None of the patients had any severe complications, such as inferior eyelid ectropion, lagophthalmos, scar hyperplasia, and diplopia, in the long term (6 months) postoperatively. Five patients showed mild eyelid-eyeball separation and recovered in 1 month. Four patients had diplopia, and 3 patients had chemosis; all recovered in 7 days. The tear trough depression was not corrected completely in 2 patients. The operation showed satisfactory results in the improvement of tear trough depression in addition to alleviation of inferior eyelid bulging and loose inferior eyelid skin that is caused by the traditional inferior eyelid pouch removal.

Asunto(s)

Blefaroplastia , Ectropión , Laceraciones , Tejido Adiposo/trasplante , Blefaroplastia/métodos , Depresión , Diplopía/cirugía , Ectropión/cirugía , Párpados/cirugía , Humanos , Laceraciones/cirugía

Asunto(s)

Neoplasias de Células Germinales y Embrionarias , Neoplasias , Biomarcadores de Tumor , Femenino , Sangre Fetal , Humanos , Embarazo , Atención Prenatal

RESUMEN

Uric acid is a powerful antioxidant. However, its elevated levels in association with cardiovascular diseases predispose individuals to cognitive impairment. Uric acid's effects on cognition may be related to its concentration and exposure period. We aimed to explore the effects of long-term elevated serum uric acid on cognitive function and hippocampus. Rats were randomly divided into four groups: NC, M1, M2 and M3 groups. Hyperuricemia was established in rats at week 6 and maintained until week 48 in groups M1, M2 and M3. The rats' spatial learning and memory abilities were assessed by the Morris Water Maze test at weeks 0, 6, 16, 32, and 48. After week 48, we observed pathological changes in right hippocampal CA1 and CA3 regions, and measured levels of oxidative stress, inflammatory cytokines, and ß-amyloid peptide of left hippocampus. Starting from week 6, the serum uric acid level of M3 group > M2 group, the serum uric acid level of M2 group > M1 group, and the serum uric acid level of M1 group > NC group. The rats in M3 and M2 groups had longer escape latencies, longer mean distances to the platform, more extensive pathological damage, stronger inflammation response, higher oxidative stress and ß-amyloid peptide levels than those in NC group. No significant differences were observed between M1 and NC groups. In addition, we also found that oxidative stress significantly correlated with tumour necrosis factor-α and ß-amyloid peptide. Long-term elevated serum uric acid was significantly associated with cognitive impairment risk. Oxidative stress, tumour necrosis factor-α and ß-amyloid peptide may mediate the pathogenesis of the cognitive impairment induced by uric acid. The detrimental effect of elevated serum uric acid on cognitive function was probably expressed when the serum uric acid concentration reached a certain level.

Asunto(s)

Disfunción Cognitiva/etiología , Hiperuricemia/sangre , Hiperuricemia/complicaciones , Ácido Úrico/sangre , Animales , Biomarcadores , Cognición , Disfunción Cognitiva/diagnóstico , Citocinas/metabolismo , Modelos Animales de Enfermedad , Susceptibilidad a Enfermedades , Inmunohistoquímica , Masculino , Aprendizaje por Laberinto , Estrés Oxidativo , Ratas , Evaluación de Síntomas

RESUMEN

Cyclosporine A (CsA) extracted from the products of fungal fermentation is used to develop a chronic nephropathy model. However, it has numerous side effects. Ochratoxin A (OTA) is a mycotoxin that induces renal injury. We developed a chronic nephropathy model to lessen the side effects of CsA by administration of nontoxic dosage of OTA, and investigated the underlying mechanism. C57BL/10 wild-type mice, toll-like receptor 4 (TLR4)-/- mice, and HK-2 cells were used in this study. The nontoxic dosage (0.25 mg/kg, qod) of OTA could significantly decrease the dosage of CsA from 30 to 20 mg/kg per day, and combination of them induced chronic nephropathy model and alleviated the side effects of onefold CsA in vivo, including cardiotoxicity, hepatotoxicity, and immunosuppression. The nontoxic concentration (0.5 µg/ml) of OTA could significantly decrease the concentration of CsA from 10 to 6 µg/ml that induced cytotoxicity, oxidative stress, and nephrotoxicity in vitro. Nontoxic concentration of OTA and low dosage of CsA activated TLR4 and autophagy. These toxic effects induced by OTA and CsA could be reversed by knockdown of TLR4 and autophagy inhibitor 3-methyladenine in vitro. Furthermore, the renal injury and autophagy induced by OTA and CsA could be attenuated in TLR4-/- mice. It suggested that a chronic nephropathy model had been successfully developed by administration of nontoxic concentration of OTA and low dosage of CsA via TLR4-mediated autophagy. The side effects of current model were significantly lesser than those of the previous model induced by onefold CsA. It provided a new tool for exploring the pathogenesis and treatment of chronic kidney disease.

Asunto(s)

Ciclosporina/farmacología , Fallo Renal Crónico/tratamiento farmacológico , Ocratoxinas/farmacología , Receptor Toll-Like 4/efectos de los fármacos , Animales , Autofagia/efectos de los fármacos , Humanos , Inmunosupresores/farmacología , Fallo Renal Crónico/metabolismo , Masculino , Ratones , Insuficiencia Renal Crónica/tratamiento farmacológico , Insuficiencia Renal Crónica/metabolismo , Transducción de Señal/efectos de los fármacos , Receptor Toll-Like 4/metabolismo

RESUMEN

Introduction: Congenital diaphragmatic eventration (CDE) is defined as the abnormal elevation of the diaphragm, due to incomplete muscularization of the diaphragm with a thin membranous sheet replacing normal diaphragmatic muscle. Case report: We report a prenatal case with a diaphragmatic mesothelial cyst combined with CDE. Conclusion: A large cystic mass between the thoracic wall and the liver in early pregnancy is highly suggestive of cystic diaphragm.

Asunto(s)

Diafragma/anomalías , Diafragma/embriología , Eventración Diafragmática/diagnóstico , Adulto , Anomalías Congénitas , Diagnóstico Diferencial , Epitelio/patología , Femenino , Feto , Humanos , Hígado/embriología , Masculino , Embarazo , Diagnóstico Prenatal , Pared Torácica/embriología , Ultrasonografía

RESUMEN

Magnolol, the main and active ingredient of the Magnolia officinalis, has been widely used in traditional prescription to the human disorders. Magnolol has been proved to have several pharmacological properties including anti-bacterial, anti-oxidant and anti-inflammatory activities. However, the effects of magnolol on ulcerative colitis (UC) have not been reported. The aim of this study was to investigate the protective effects and mechanisms of magnolol on dextran sulphate sodium (DSS)-induced colitis in mice. The results showed that magnolol significantly alleviated DSS-induced body weight loss, disease activities index (DAI), colon length shortening and colonic pathological damage. In addition, magnolol restrained the expression of TNF-α, IL-1ß and IL-12 via the regulation of nuclear factor-κB (NF-κB) and Peroxisome proliferator-activated receptor-γ (PPAR-γ) pathways. Magnolol also enhanced the expression of ZO-1 and occludin in DSS-induced mice colonic tissues. These results showed that magnolol played protective effects on DSS-induced colitis and may be an alternative therapeutic reagent for colitis treatment.

Asunto(s)

Compuestos de Bifenilo/uso terapéutico , Colitis Ulcerosa/inducido químicamente , Colitis Ulcerosa/tratamiento farmacológico , Sulfato de Dextran , Fármacos Gastrointestinales/uso terapéutico , Mucosa Intestinal/efectos de los fármacos , Lignanos/uso terapéutico , Animales , Ciego/microbiología , Colitis Ulcerosa/patología , Colon/patología , Citocinas/biosíntesis , Inflamación/fisiopatología , Inflamación/prevención & control , Mediadores de Inflamación , Mucosa Intestinal/patología , Masculino , Ratones , Ratones Endogámicos C57BL , Ocludina/antagonistas & inhibidores , Ocludina/biosíntesis , PPAR gamma/efectos de los fármacos , Pérdida de Peso/efectos de los fármacos

RESUMEN

Multiple primary malignancies (MPM) are rare. In particular, synchronous gallbladder and gastric malignancies are extremely rare, are associated with a concealed onset and atypical symptoms, and are highly likely to be overlooked or misdiagnosed. The clinical data of two patients with synchronous gallbladder and gastric malignancies are herein reported and integrated with the relevant literature to retrospectively analyze and summarize the pathogenesis and clinical characteristics of MPM. Case 1 was a male 46-year-old patient who underwent laparoscopic cholecystectomy, and succumbed to extensive tumor metastasis 2 months after the operation. Case 2 was an 80-year-old female patient who was treated with distal gastrectomy for gastric cancer, cholecystectomy, gastrojejunostomy and dissection of 5 suprapyloric, 6 subpyloric, 7 left gastric and 8 common hepatic artery lymph nodes, and succumbed to multiple organ failure induced by extensive tumor invasion within 1 week after the operation. Clinical physicians must pay closer attention to early symptoms of MPM in order to make an accurate diagnosis, perform timely radical surgical treatment and achieve favorable therapeutic outcomes, in terms of significantly increasing long-term patient survival rates.

RESUMEN

The purpose of this study was to investigate the protective effects and mechanisms of the essential oil of Zanthoxylum bungeanum pericarp (ZBEO) on dextran sulfate sodium (DSS)-induced experimental colitis in mice. ZBEO decreased DSS-induced body weight loss, the disease activity index, colon length shortening, colonic pathological damage, and myeloperoxidase activities. The production of pro-inflammatory mediators was significantly alleviated by ZBEO. Further mechanistic analysis showed that ZBEO inhibited inflammation by regulating NF-κB and PPARγ pathways. ZBEO also inhibited NLRP3 activation in colitis in mice. Furthermore, ZBEO contributed to the maintenance of tight junction architecture by regulating the expression of zonula occludens-1 during colitis. Surprisingly, treatment with ZBEO increased levels of the commensal bacteria containing Lactobacillus and Bifidobacteria but reduced Escherichia coli levels in the feces of mice. These results suggested that supplementation with ZBEO might provide a new dietary strategy for the prevention of ulcerative colitis.

Asunto(s)

Colitis/tratamiento farmacológico , Aceites Volátiles/administración & dosificación , Extractos Vegetales/administración & dosificación , Zanthoxylum/química , Animales , Colitis/inducido químicamente , Colitis/genética , Colitis/inmunología , Colon/efectos de los fármacos , Colon/inmunología , Sulfato de Dextran/efectos adversos , Modelos Animales de Enfermedad , Humanos , Masculino , Ratones , Ratones Endogámicos C57BL , FN-kappa B/genética , FN-kappa B/inmunología , Proteína con Dominio Pirina 3 de la Familia NLR/genética , Proteína con Dominio Pirina 3 de la Familia NLR/inmunología , PPAR gamma/genética , PPAR gamma/inmunología

RESUMEN

Objective: To investigate the influence of environment on the genetic structure and chemical ingredients of different Codonopsis species. Methods: Amplified fragment length polymorphism( AFLP) molecular markers were used to analyze the genetic polymorphism of Codonopsis species from 24 different populations,and high performance liquid chromatography( HPLC) fingerprints were performed to analyze the chemical ingredients of 10 batches of Codonopsis roots. Results: According to species classification,the 24 populations were categorized into three groups by UPGMA cluster method. The samples of Codonopsis pilosula var. modesta introduced from Wenxian( Gansu Province) and Jiuzhaigou County( Sichuan Province) were clustered into Group Ⅰ. The Codonopsis tangshen population introduced from Banqiao( Hubei Province) was clustered into Group Ⅱ. The populations from Codonopsis pilosula introduced to Shanxi Province GAP base,and the wild and cultured populations of Codonopsis pilosula collected from Shanxi Province were into Group Ⅲ. The similarity of HPLC fingerprints among three Codonopsis species introduced into the same environment was over 0. 8. Conclusion: Genetic differences of three Codonopsis species from original areas and Codonopsis species introduced into Shanxi Province were caused by their inter-species genetic characteristic. Meanwhile, the similarities of genetic backgrounds in Codonopsis species were related to geographic space, and chemical ingredients of Codonopsis were easily influenced by the cultivation environment.

RESUMEN

OBJECTIVE: To investigate the histogenesis, clinicopathologic characteristics, pathologic diagnosis, differential diagnosis, treatment and prognosis of basal cell carcinoma of the Prostate (BCCP). METHODS: We conducted clinicopathologic analysis on the manifestations of 5 cases of BCCP by HE staining and immunohistochemistry and reviewed relevant literature. RESULTS: Microscopically, the tumor cells were small in volume with ovoid karyomegaly and mitosis, some arranged like a solid nest or with a cribriform appearance. The tumors displayed an invasive growth, with positive expressions of 34betaE12, P63 and Cytokeratin 14, and negative expressions of PSA and P504s. No recurrence and metastasis were found in these patients during over 12 months of follow-up after surgery. CONCLUSION: BCCP is a rare neoplasm different from prostate adenocarcinoma. Immunohistochemistry is indispensable in distinguishing this tumor from other types of prostatic carcinoma. Its biological behavior remains to be further studied. The best treatment option may be radical surgery combined with chemo-radiotherapy at the present time.

Asunto(s)

Carcinoma Basocelular/patología , Neoplasias de la Próstata/patología , Anciano , Humanos , Masculino , Persona de Mediana Edad

RESUMEN

Wogonoside is the main flavonoid component derived from the root of Scutellaria baicalensis Georgi. It is a popular Chinese herbal medicine with the potential to treat hematologic malignancies. In this study, we investigated the anticancer effects of wogonoside in acute myeloid leukemia (AML) cell lines and primary patient-derived AML cells. Wogonoside exerted antiproliferative properties both in vitro and in vivo. Furthermore, it efficiently inhibited the proliferation of U937 and HL-60 cells through the induction of G1 phase arrest and the promotion of differentiation. We also demonstrated that wogonoside significantly increased the transcription of phospholipid scramblase 1 (PLSCR1) due to its influence on the expression of cell cycle- and differentiation-related genes, including the upregulation of p21waf1/cip1 and downregulation of the oncogenic protein c-Myc. Wogonoside also promoted PLSCR1 trafficking into the nucleus and facilitated its binding to the inositol 1,4,5-trisphosphate receptor 1 (IP3R1) promoter, thus increasing the expression of IP3R1. Finally, inhibition of PLSCR1 expression with small interfering RNA partially blocked wogonoside-induced cell cycle arrest and differentiation and disturbed the wogonoside-associated molecular events. The results of this study therefore suggest that wogonoside may represent a therapeutic candidate for the treatment of AML.

Asunto(s)

Puntos de Control del Ciclo Celular/efectos de los fármacos , Diferenciación Celular/efectos de los fármacos , Flavanonas/farmacología , Glucósidos/farmacología , Leucemia Mieloide Aguda , Proteínas de Transferencia de Fosfolípidos/metabolismo , Transporte Activo de Núcleo Celular/efectos de los fármacos , Transporte Activo de Núcleo Celular/genética , Animales , Antineoplásicos/farmacología , Diferenciación Celular/genética , Núcleo Celular/efectos de los fármacos , Núcleo Celular/metabolismo , Regulación Leucémica de la Expresión Génica/efectos de los fármacos , Células HL-60 , Humanos , Leucemia Mieloide Aguda/genética , Leucemia Mieloide Aguda/metabolismo , Leucemia Mieloide Aguda/patología , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , Ratones SCID , Proteínas de Transferencia de Fosfolípidos/genética , Transporte de Proteínas/efectos de los fármacos , Transporte de Proteínas/genética , Distribución Tisular/efectos de los fármacos , Células U937 , Ensayos Antitumor por Modelo de Xenoinjerto

RESUMEN

OBJECTIVE: To explore the clinical characteristics of Wolman disease and diagnostic methods using enzymatic and molecular analysis. METHOD: Lysosomal acid lipase activity was measured using 4-methylumbelliferyl oleate in the leukocytes of an infant suspected of Wolman disease and LIPA gene mutational analysis was performed by PCR and direct sequencing in the proband and his parents. After the diagnosis was confirmed, the clinical, biochemical, radiological and histopathological findings in this case of Wolman disease were retrospectively reviewed. RESULT: The sixteen-day-old boy was failing to thrive with progressive vomiting, abdominal distention and hepatosplenomegaly. Abdominal X-ray revealed adrenal calcifications which were confirmed on abdominal CT scan. Xanthomatosis were observed on enlarged liver, spleen and lymph nodes during abdominal surgery. Liver and lymph node biopsy showed foamy histiocytes. The lysosomal acid lipase activity in leukocytes was 3.5 nmol/(mg·h) [control 35.5 - 105.8 nmol/(mg·h)]. Serum chitotriosidase activity was 315.8 nmol/(ml·h) [control 0 - 53 nmol/(ml·h)]. The patient was homozygote for a novel insert mutation allele c.318 ins T, p. Phe106fsX4 in exon 4 on LIPA gene. His both parents were carriers of the mutation. CONCLUSION: The clinical features of Wolman disease include early onset of vomiting, abdominal distention, growth failure, hepatosplenomegaly and bilateral adrenal calcification after birth. A plain abdominal X-ray film should be taken to check for the typical pattern of adrenal calcification in suspected cases of Wolman disease. The enzymatic and molecular analyses of lysosomal acid lipase can confirm the diagnosis of Wolman disease.

Asunto(s)

Leucocitos/enzimología , Lipasa/sangre , Mutación , Esterol Esterasa/genética , Enfermedad de Wolman/diagnóstico , Enfermedad de Wolman/genética , Enfermedades de las Glándulas Suprarrenales/etiología , Enfermedades de las Glándulas Suprarrenales/patología , Exones , Humanos , Recién Nacido , Lipasa/genética , Hígado/patología , Lisosomas/enzimología , Lisosomas/genética , Masculino , Reacción en Cadena de la Polimerasa , Esplenomegalia/patología , Tomografía Computarizada por Rayos X , Enfermedad de Wolman/enzimología , Enfermedad de Wolman/patología

RESUMEN

OBJECTIVE: To recognize the importance of analyzing the result of immunohistochemical staining correctly. METHOD: Review of the three misdiagnosed cases lymphoma and exploring the causes of misdiagnosis through reviewing their clinics, histopathology and immunohistochemistry. RESULTS: Case 1 of lymphocyte rich classical Hodgkin's lymphoma (LRCHL) was misdiagnosed as follicular lymphoma (FL) initially, the RS cells were overlooked morphologically and wrongly determined BCL-2 and CD20-positive cells as tumor cells immunohistochemically; also once misdiagnosed as nodular lymphocyte predominant Hodgkin's lymphoma (NLPHL) because the CD20-negative RS misjudged cells as the positives. Case 2 of AML tumor cells expressed TdT, CD7 and CD43 unspecifically, which misdiagnosed as T-cell lymphoblastic lymphoma (T-LBL). Case 3 of type B1 thymoma was misdiagnosed as T-LBL, because CK wasn't expressed satisfactorily resulting in neglecting neoplastic epithelial cells, and lymphocytes in the background were TdT and CD99-positive. CONCLUSION: The diagnosis of lymphoma should be based on morphology, immunohistochemistry, clinics, and genetics. Moreover, the correct judgment of immunohistochemical staining is essential to make right diagnosis.

Asunto(s)

Errores Diagnósticos , Linfoma/diagnóstico , Adulto , Femenino , Humanos , Inmunohistoquímica , Masculino , Persona de Mediana Edad