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1.
Int J Ophthalmol ; 17(2): 374-379, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38371255

RESUMEN

AIM: To investigate the frequency and associated factors of accommodation and non-strabismic binocular vision dysfunction among medical university students. METHODS: Totally 158 student volunteers underwent routine vision examination in the optometry clinic of Guangxi Medical University. Their data were used to identify the different types of accommodation and non-strabismic binocular vision dysfunction and to determine their frequency. Correlation analysis and logistic regression were used to examine the factors associated with these abnormalities. RESULTS: The results showed that 36.71% of the subjects had accommodation and non-strabismic binocular vision issues, with 8.86% being attributed to accommodation dysfunction and 27.85% to binocular abnormalities. Convergence insufficiency (CI) was the most common abnormality, accounting for 13.29%. Those with these abnormalities experienced higher levels of eyestrain (χ2=69.518, P<0.001). The linear correlations were observed between the difference of binocular spherical equivalent (SE) and the index of horizontal esotropia at a distance (r=0.231, P=0.004) and the asthenopia survey scale (ASS) score (r=0.346, P<0.001). Furthermore, the right eye's SE was inversely correlated with the convergence of positive and negative fusion images at close range (r=-0.321, P<0.001), the convergence of negative fusion images at close range (r=-0.294, P<0.001), the vergence facility (VF; r=-0.234, P=0.003), and the set of negative fusion images at far range (r=-0.237, P=0.003). Logistic regression analysis indicated that gender, age, and the difference in right and binocular SE did not influence the emergence of these abnormalities. CONCLUSION: Binocular vision abnormalities are more prevalent than accommodation dysfunction, with CI being the most frequent type. Greater binocular refractive disparity leads to more severe eyestrain symptoms.

2.
Eur Thyroid J ; 12(6)2023 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-37992281

RESUMEN

Introduction: Thyroid metastasis from clear cell renal cell carcinoma (ccRCC) is relatively rare, so ultrasound doctors lack experience with the disease, which can easily lead to misdiagnosis. We describe three cases of thyroid metastasis from ccRCC detected 12, 8, and 7 years after nephrectomy. Case presentation: The first patient, a 78-year-old woman, was admitted to our institution for hoarseness and progressive dyspnea. Ultrasonography revealed bilateral thyroid nodules and abnormal cervical lymph nodes. Fine-needle aspiration biopsy (FNAB) and core needle biopsy (CNB) of the thyroid was nondiagnostic. The other two patients, a 54-year-old man and a 65-year-old man, were admitted to our institution for a goiter pressing on the trachea. In each case, ultrasonography revealed a partially cystic nodule of the left lobe of the thyroid gland. Histological examination of three patients after thyroidectomy showed thyroid metastasis from ccRCC. Discussion/Conclusion: For patients with a history of ccRCC, long-term follow-up and routine thyroid ultrasonography should be performed. If a new thyroid nodule is found during the examination, metastases should be highly suspected. FNAB should be performed, even if benign ultrasound features seem to be in evidence. If the diagnosis of FNAB is incorrect and inconclusive, CNB should be performed.


Asunto(s)
Carcinoma de Células Renales , Carcinoma , Neoplasias Renales , Neoplasias de la Tiroides , Nódulo Tiroideo , Masculino , Femenino , Humanos , Anciano , Persona de Mediana Edad , Carcinoma de Células Renales/diagnóstico por imagen , Neoplasias de la Tiroides/diagnóstico por imagen , Nódulo Tiroideo/diagnóstico por imagen , Carcinoma/diagnóstico , Ultrasonografía , Neoplasias Renales/diagnóstico por imagen
3.
Chin J Nat Med ; 19(11): 815-824, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-34844720

RESUMEN

Cervical cancer (CC) is recognized as the most common neoplasm in the female reproductive system worldwide. The lack of chemotherapeutic agents with outstanding effectiveness and safety severely compromises the anti-cipated prognosis of patients. Aloperine (ALO) is a natural quinolizidine alkaloid with marked anti-cancer effects on multiple malignancies as well as favorable activity in relieving inflammation, allergies and infection. However, its therapeutic efficacy and underlying mechanism in CC are still unclear. In the current study, MTT assay was employed to evaluate the viability of HeLa cells exposed to ALO to preliminarily estimate the effectiveness of ALO in CC. Then, the effects of ALO on the proliferation and apoptosis of HeLa cells were further investigated by plate colony formation and flow cytometry, respectively, while the migration and invasion of ALO-treated HeLa cells were evaluated using Transwell assay. Moreover, nude mice were subcutaneously inoculated with HeLa cells to demonstrate the anti-CC properties of ALO in vivo. The molecular mechanisms underlying these effects of ALO were evaluated by Western blot and immunohistochemical analysis. This study experimentally demonstrated that ALO inhibited the proliferation of HeLa cells via G2 phase cell cycle arrest. Simultaneously, ALO promoted an increase in the percentage of apoptotic HeLa cells by increasing the Bax/Bcl-2 ratio. Additionally, the migration and invasion of HeLa cells were attenuated by ALO treatment, which was considered to result from inhibition of epithelial-to-mesenchymal transition. For molecular mechanisms, the expression and activation of the IL-6-JAK1-STAT3 feedback loop were markedly suppressed by ALO treatment. This study indicated that ALO markedly suppresses the proliferation, migration and invasion and enhances the apoptosis of HeLa cells. In addition, these prominent anti-CC properties of ALO are associated with repression of the IL-6-JAK1-STAT3 feedback loop.


Asunto(s)
Quinolizidinas/farmacología , Neoplasias del Cuello Uterino , Animales , Apoptosis , Línea Celular Tumoral , Movimiento Celular , Proliferación Celular , Retroalimentación , Femenino , Células HeLa , Humanos , Interleucina-6/genética , Janus Quinasa 1/genética , Ratones , Ratones Desnudos , Factor de Transcripción STAT3/genética , Transducción de Señal , Neoplasias del Cuello Uterino/tratamiento farmacológico
4.
Chemistry ; 26(13): 2766-2779, 2020 Mar 02.
Artículo en Inglés | MEDLINE | ID: mdl-31697441

RESUMEN

Porous coordination polymers or metal-organic frameworks with reversible phase-transition behavior possess some attractive properties, and can respond to external stimuli, including physical and chemical stimuli, in a dynamic fashion. Their phase transitions can be triggered by adsorption/desorption of guest molecules, temperature changes, high pressure, light irradiation, and electric fields; these mainly include two types of transitions: crystal-amorphous and crystal-crystal transitions. These types of porous coordination polymers have received much attention because of their interesting properties and potential applications. Herein, reversible phase transition porous coordination polymers are summarized and classified based on different stimuli sources. Corresponding typical examples are then introduced. Finally, examples of their applications in gas separation, chemical sensors, guest molecule encapsulation, and energy storage are also presented.

5.
Oncol Rep ; 41(5): 2937-2944, 2019 May.
Artículo en Inglés | MEDLINE | ID: mdl-30896824

RESUMEN

Timosaponin A­III (TAIII) is a saponin isolated from anemarrhena asphodeloides and possesses the inhibitory effect on proliferation of multiple tumor cells. In the present study, the antitumor effect of TAIII and its underlying molecular mechanisms were investigated in vitro in T­cell acute lymphoblastic leukemia (T­ALL) Jurkat cells. The results demonstrated that TAIII inhibits the viability of Jurkat cells in a time­ and dose­dependent manner, and induces apoptosis of Jurkat cells in a dose­dependent manner. Transmission electron microscopy demonstrated the formation of numerous autophagosomes in TAIII­treated Jurkat cells. Furthermore, monodansylcadaverine (MDC)­labeled autophagic vacuoles were observed following TAIII treatment by an inverted fluorescence microscope and MDC accumulation increased notably in TAIII treatment groups in a concentration­dependent manner. B­cell lymphoma­2 (Bcl­2)­associated X (Bax) was upregulated while Bcl­2 was reduced following TAIII treatment, indicating that the pro­apoptotic mechanism of TAIII may be associated with upregulation of Bax. Further investigation revealed that TAIII promotes the expression of autophagy­associated proteins Beclin 1 and LC3­II, and inhibits the phosphoinositide 3­kinase/Akt/mechanistic target of rapamycin kinase pathway. The present study revealed that the antitumor activity of TAIII was primarily achieved by the induction of cell apoptosis and autophagy, indicating a promising potential as a novel effective reagent against T­ALL.


Asunto(s)
Autofagia/efectos de los fármacos , Leucemia-Linfoma Linfoblástico de Células T Precursoras/tratamiento farmacológico , Saponinas/farmacología , Transducción de Señal/efectos de los fármacos , Esteroides/farmacología , Apoptosis/efectos de los fármacos , Línea Celular Tumoral , Relación Dosis-Respuesta a Droga , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Células Jurkat , Fosfatidilinositol 3-Quinasas/metabolismo , Leucemia-Linfoma Linfoblástico de Células T Precursoras/patología , Proteínas Proto-Oncogénicas c-akt/metabolismo , Saponinas/uso terapéutico , Esteroides/uso terapéutico , Serina-Treonina Quinasas TOR/metabolismo
6.
Chemistry ; 25(22): 5787-5792, 2019 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-30786080

RESUMEN

Over the last decade, the controllable reversible phase transition of functional materials has received growing interest as it shows unique suitability for various technological applications. Although many metal-organic frameworks (MOFs) possess a lamellar structure, the reversible structural transformation of MOFs between their three-dimensional (3D) phase and two-dimensional (2D) phase remains a largely unexplored area. Herein, we report for the first time a europium MOF with unprecedented reversible morphology in different solvents at room temperature. This europium MOF displayed a 3D nanorod morphology in organic solvent and a 2D nanobelt architecture in water. As a proof of concept for potential applications of this reversible-phase-transition MOF, we were able to use a delamination recovery method to load dye molecules that previously could not be loaded into europium MOFs.

7.
Environ Microbiol ; 21(2): 864-879, 2019 02.
Artículo en Inglés | MEDLINE | ID: mdl-30623556

RESUMEN

Isaria cicadae is an entomogenous fungus of great medicinal value. Its nuclear genome has been reported, while its mitogenome remains unknown. Herein, we first described its mitogenome and then inferred intron evolution from both intraspecific and interspecific perspectives. The fungus represented the largest mitogenome (56.6 kb in strain CCAD02) known in Cordycipitaceae due to the presence of 25 introns interrupting nine genes. Comparison of three I. cicadae strains revealed intron presence/absence dynamics at six intron loci plus a few indels and single nucleotide polymorphisms. Phylogenetic analyses confirmed the placement of I. cicadae in Cordycipitaceae. Comparison of 10 Cordycipitaceae species revealed a high degree of synteny and conserved genetic content. They, however, varied in intron numbers (1-25 per species) with overall 34 intron loci identified, which resulted in more than twofold variations in mitogenome sizes (24.5-56.6 kb). An rnl intron encoding ribosomal protein S3 was present in all species, suggesting its early invasion in Cordycipitaceae, while further divergence occurred for this intron. The other introns identified in this study were present in some, but not all of the species and have undergone multiple gains and losses in Cordycipitaceae. This study greatly enhanced our understanding of intron evolution in Cordycipitaceae.


Asunto(s)
Cordyceps/genética , Evolución Molecular , Genoma Mitocondrial , Hypocreales/genética , Cordyceps/clasificación , Genoma Fúngico , Hypocreales/clasificación , Intrones , Filogenia , Sintenía
8.
Angew Chem Int Ed Engl ; 54(43): 12636-9, 2015 Oct 19.
Artículo en Inglés | MEDLINE | ID: mdl-26331979

RESUMEN

A direct and catalyst-free method for the intramolecular aminoboration of unfunctionalized olefins is reported. In the presence of BCl3 (1 equiv) as the sole boron source, intramolecular aminoboration of sulfonamide derivatives of 4-penten-1-amines, 5-hexen-1-amines, and 2-allylanilines proceeded readily without the use of any catalyst. The boronic acids obtained after hydrolysis could be converted into the corresponding pinacol borates in a straightforward manner by treatment with pinacol under anhydrous conditions.


Asunto(s)
Alquenos/química , Aminas/química , Boro/química , Ácidos Borónicos/química , Alquenos/síntesis química , Aminación , Aminas/síntesis química , Ácidos Borónicos/síntesis química , Catálisis , Hidrólisis
9.
Mol Med Rep ; 12(1): 1457-64, 2015 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-25760224

RESUMEN

T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive type of blood malignancy, deriving from T-cell progenitors in the thymus, and comprises 10-15% of pediatric and 25% of adult primary ALL cases. Despite advances, 20% of pediatric and the majority of adult patients with T-ALL succumb to mortality from resistant or relapsed disease, and the survival rate for patients with resistant or relapsed T-ALL remains poor. Alterations in the expression of Forkhead box protein M1 (FoxM1) have been detected in several types of cancer, and the inhibition of FoxM1 has been investigated as therapeutic strategy in cancer. The present study investigated the effects of the inhibition of FoxM1 by thiostrepton in human T-ALL Jurkat cells. The cells were treated with different concentrations of thiostrepton, either alone or in combination with doxorubicin. Cell viability was measured using CCK-8 assays and the cell cycle distribution, apoptosis and cell-associated mean fluorescence intensity of intracellular doxorubicin were assessed using flow cytometric analysis. The mRNA and protein expression levels were detected by reverse transcription-quantitative polymerase chain reaction and western blot analyses. The inhibition of FoxM1 by thiostrepton significantly decreased the proliferation of the Jurkat cells proliferation in a time- and dose-dependent manner. Cell arrest at the G2/M phase, and apoptosis was significantly increased in the thiostrepton-treated Jurkat cells. Thiostrepton reduced the half maximal inhibitory concentration of doxorubicin in the Jurkat cells, and significantly enhanced the cytotoxicity of doxorubicin within the Jurkat cells by enhancing doxorubicin-induced apoptosis and increasing the accumulation of intracellular doxorubicin. Furthermore, the inhibition of FoxM1 by thiostrepton enhanced doxorubicin-induced apoptosis, possibly through a caspase-3-dependent pathway, and increased the accumulation of intracellular doxorubicin, possibly through downregulating the expression of glutathione S-transferase pi. Collectively, the results of the present study suggested that targeting FoxM1 with thiostrepton resulted in potent antileukemia activity and chemosensitizing effects in human T-ALL Jurkat cells.


Asunto(s)
Factores de Transcripción Forkhead/biosíntesis , Leucemia-Linfoma Linfoblástico de Células T Precursoras/tratamiento farmacológico , Leucemia-Linfoma Linfoblástico de Células T Precursoras/genética , Tioestreptona/administración & dosificación , Apoptosis/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Doxorrubicina/administración & dosificación , Proteína Forkhead Box M1 , Factores de Transcripción Forkhead/antagonistas & inhibidores , Factores de Transcripción Forkhead/genética , Puntos de Control de la Fase G2 del Ciclo Celular/efectos de los fármacos , Regulación Neoplásica de la Expresión Génica/efectos de los fármacos , Gutatión-S-Transferasa pi/biosíntesis , Humanos , Células Jurkat , Leucemia-Linfoma Linfoblástico de Células T Precursoras/patología , ARN Mensajero/biosíntesis
10.
Di Yi Jun Yi Da Xue Xue Bao ; 23(2): 130-2, 137, 2003 Feb.
Artículo en Chino | MEDLINE | ID: mdl-12581960

RESUMEN

OBJECTIVE: To investigate the in vitro biocompatibility and degradation of nacre/polylactic acid composite artificial bone (NPCB) grafts. METHODS: Human osteoblast cells were cultured with NPCB discs for observation of the morphological features and cell proliferation by optical microscope and scanning electron microscope. The mass loss of NPCB discs and pH variations of the saline in which the discs were immersed were examined every 2 weeks in a course of 16 weeks in vitro. RESULT: Compared with the negative control group, NPCB showed no visible cytotoxicity and facilitated the growth and proliferation of the osteoblast cells. As the immersion prolonged, gradual decrease in the mass of NPCB was observed accompanied by regular pH alteration of the saline. CONCLUSION: NPCB possesses good in vitro biocompatibility and may be gradually degraded.


Asunto(s)
Materiales Biocompatibles/química , Sustitutos de Huesos/química , Ácido Láctico/química , Polímeros/química , Materiales Biocompatibles/metabolismo , Sustitutos de Huesos/metabolismo , Ácido Láctico/metabolismo , Poliésteres , Polímeros/metabolismo , Prótesis e Implantes
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