Head and neck squamous cell carcinoma is the sixth most common tumor worldwide, and half of head and
neck squamous cell carcinoma patients are with oral squamous cell carcinoma (OSCC). 300,000 new cases of OSCC
were reported annually. Even with multi-modality treatment, the prognosis of OSCC remains unsatisfactory. Thus, it
is urgent to discover novel therapeutic targets for OSCC. Some microarray studies have revealed that Keratin 4
(KRT4) is downregulated in OSCC, whereas its role in OSCC development remains unknown. The present study
revealed that KRT4 suppressed OSCC progression by inducing cell apoptosis and inhibiting cell invasion. In addition,
KRT4 over-expression inhibited autophagy by blocking the interaction of autophagy-related 4B cysteine peptidase
(ATG4B) and microtubule-associated protein 1A/1B light chain 3 (LC3) to regulate apoptosis and invasion of OSCC.
In conclusion, KRT4 played an important role in OSCC development through regulating ATG4B-mediated autophagy
and may be a novel therapeutic drug target of OSCC. 相似文献
Melanins represent one of the most ancient and important group of natural macromolecular pigments. They have multiple biological roles in almost all organisms across the Phyla, examples being photoprotection, anti-oxidative action, radical scavenger activity, and heavy metal removal. From the biomedical point of view, melanocytes are involved in the origin of melanoma tumors, and the main therapeutic advances for their treatment have been revised in Part 1 of this review. The chemical structure of eumelanin is a biological concern of great importance, and therefore, exploring theoretical molecular models and synthesis mechanisms will be here described, as well as molecular orbital features and supramolecular organization, which are responsible for the key properties that make these biological pigments so important, and so fascinating. Ultimately, this updated overview is devoted to describe present structural models and physico-chemical characteristics of eumelanin, in order to explain and utilize melanin properties on which new photothermal and ultrasonic protocols for melanoma treatment can be devised and applied.
This paper presents a general approach for building a robust and efficient supervision system for fault detection and recovery. The approach uses a set of monitors that obtain information about the system state and, instead of detecting fault states directly, detects significant differences between perceived and expected states. To deal with uncertainty in the knowledge about the system state and the result of some actions, it uses a POMDP model to decide when it is worthwhile to take recovery actions. We present the general approach and show its application with an indoor mobile robot by reporting and evaluating comparative results for different solutions. 相似文献