7,8-Dihydroxyflavone

7,8-Dihydroxyflavone (7,8-DHF) is a naturally-occurring flavone found in Godmania aesculifolia, Tridax procumbens, and primula tree leaves. It has been found to act as a potent and selective small-molecule agonist of the TrkB receptor (K_d ≈ 320 nM), the main signaling receptor of brain-derived neurotrophic factor (BDNF). 7,8-DHF is both orally-bioavailable and able to penetrate the blood-brain-barrier.

7,8-DHF has demonstrated remarkable therapeutic efficacy in animal models of a variety of central nervous system disorders, including depression,Alzheimer's disease,cognitive deficits in schizophrenia,Parkinson's disease,Huntington's disease,amyotrophic lateral sclerosis,traumatic brain injury,cerebral ischemia,fragile X syndrome, and Rett syndrome. 7,8-DHF also shows efficacy in animal models of age-associated cognitive impairment and enhances memory consolidation and emotional learning in healthy rodents. In addition, 7,8-DHF possesses powerful antioxidant activity independent of its actions on the TrkB receptor, and protects against glutamate-induced excitotoxicity,6-hydroxydopamine-induced dopaminergic neurotoxicity, and oxidative stress-induced genotoxicity. It was also found to block methamphetamine-induced dopaminergic neurotoxicity, an effect which, in contrast to the preceding, was found to be TrkB-dependent.

Design history file

A design history file is a compilation of documentation that describes the design history of a finished medical device. The design history file, or DHF, is part of regulation introduced in 1990 when the U.S. Congress passed the Safe Medical Devices Act, which established new standards for medical devices that can cause or contribute to the death, serious illness, or injury of a patient. Prior to this legislation, U.S. Food and Drug Administration (FDA) auditors were limited to examining the production and quality control records of the device.

Requirements

The regulation requires of medical devices manufacturers of Class II and Class III devices to implement design controls. These design controls consist of a development and control plan used to manage the development of a new product, and a design history file where these activities are documented. These controls are specifically intended to manage a medical device company's new product development activities. Research and development processes aimed at developing new underlying technologies are not subject to these regulations. The requirements for a DHF are documented in FDA Regulation CFR 21 820.

DHF (disambiguation)

DHF may refer to: