Trauma to the spinal cord and brain can result in irreparable loss of function. This failure of recovery is in part due to inhibition of axon regeneration by myelin and chondroitin sulfate proteoglycans (CSPGs). Peripheral nervous system (PNS) neurons exhibit increased regenerative ability compared to central nervous system neurons, even in the presence of inhibitory environments. Previously, w...

F ascination with the ability to regenerate tissues and organs has existed since the earliest observations of Prometheus, Thevenot, and Tremblay. However, what might be called the modern era of tissue engineering and regenerative medicine began only a quarter century ago. The initial focus of a newly defined scientific discipline referred to as “tissue engineering” involved the ex vivo creation...

Carbon nanotubes (CNTs) have attracted a great deal of attention for the biological and medical science fields because of their characteristic physical and biological properties. In this study, we investigated the capacity of the 3D porous CNT scaffold (CNT porous block; CNTp) for bone regenerative medicine. Surface observations using a scanning electron microscope (SEM), crystal depositions on...

Axonal regeneration can occur within hours of injury, the first step being the formation of a new growth cone. For sensory and retinal axons, regenerative ability in vivo correlates with the potential to form a new growth cone after axotomy in vitro. We show that this ability to regenerate a new growth cone depends on local protein synthesis and degradation within the axon. Axotomy in vitro lea...

In contrast to mammals, salamanders have a remarkable ability to regenerate their spinal cord and recover full movement and function after tail amputation. To identify genes that may be associated with this greater regenerative ability, we designed an oligonucleotide microarray and profiled early gene expression during natural spinal cord regeneration in Ambystoma mexicanum. We sampled tissue a...

C ardiomyocyte replacement has been the focus of intense research because of the significant burden of heart failure. Although the adult mammalian heart is nonregenera-tive, recent studies have demonstrated that it retains a modest degree of cardiomyocyte turnover throughout life, mediated primarily by the proliferation of preexisting cardiomyo-cytes. In contrast to the adult heart, the neonata...

BACKGROUND Ectopic tissue has been observed frequently in human root canal specimens when cell homing studies were performed at the dorsum of rodents. In contrast, pulp-like tissue formed when immature teeth were implanted on top of the rat calvaria. It was surmised, yet not tested, that the implantation site might affect tissue ingrowth. METHODS Four root sections from human immature molars ...

Abstract Green Supply Chain Management (GSCM) is considered to be the most effective management tool that aims integrate environmental sustainability thinking into built environment. This in relation its ability substantially reduce greenhouse emissions, energy consumption, pollution, and other drivers of negative change Despite implementation GSCM practices, climate continues occur with a stea...