Alzheimer's symptoms and memory loss could be reversed by new compound TFP5

New research in the FASEB Journal by NIH scientists suggests that a small molecule called TFP5 rescues plaques and tangles by blocking an overactive brain signal, thereby restoring memory in mice with Alzheimer's - without obvious toxic side effects.

"We hope that clinical trial studies in AD patients yield an extended and a better quality of life, as observed in mice upon TFP5 treatment," said Harish C. Pant, Ph.D., a senior researcher participating from the Laboratory of Neurochemistry, suggesting that TFP5 could be an effective therapeutic compound.

Pant and colleagues used mice with a disease considered the equivalent of Alzheimer's to test their compound on. One set of these mice were injected with the small molecule TFP5, while the other was injected with saline as placebo. The mice, after a series of intraperitoneal injections of TFP5, displayed a substantial reduction in the various disease symptoms along with restoration of memory capabilities.

In addition, the mice receiving TFP5 injections experienced no weight loss, and seemingly no neurological stress (anxiety) or signs of toxicity. The disease in the placebo mice, however, progressed normally as expected.

TFP5 was derived from the regulator of a key brain enzyme, called Cdk5. Over-activation of Cdk5 is implicated in the formation of plaques and tangles, the major hallmark of Alzheimer's disease.

"The next step is to find out if this molecule can have the same effects in people, and if not, to find out which molecule will," said Gerald Weissmann, M.D., Editor-in-Chief of the FASEB Journal. "Now that we know that we can target the basic molecular defects in Alzheimer's disease, we can hope for treatments far better - and more specific - than anything we have today."