SYNOPSIS. I review recent advances in our knowledge of the eucaryotic cell cycle: the set of processes by which cells grow and divide. Genetic approaches to the cell cycle of somatic cells identified a pathway of events where the initiation of each event was dependent on the successful completion of the preceding event, as well as a single key gene, cdc2, that is required both at the beginning ...

INTRODUCTION ......................................... 164 SYNCHRONOUS CULTURES .................. ....................... 165 Assay of Landmarks ......... ................................ 165 Induction Synchrony .......... ............................... 166 Selection Synchrony 167 CELL DIVISION CYCLE MUTANTS ......................................... 167 Diagnostic Landmarks and Terminal Pheno...

The adult mammalian heart has a limited capacity for replacing lost tissue following injury. Mammalian cardiomyocytes exit the cell cycle shortly after birth, where they undergo a final round of DNA synthesis, binucleate, and terminally differentiate. In addition, low levels of cardiomyocyte turnover in the aging heart or following injury seem to be mediated mostly by cardiomyocyte division. Al...

A survey of cell-population models is presented. The so-called cell cycle is discussed, including some models which are not population models but which contribute to the better understanding proliferation of cell dynamics. Classical linear models of structured cell-population models are described with a review of classical results and a comparison between different approaches. Finally, some non...

The position of Chlamydomonas within the eukaryotic phylogeny makes it a unique model in at least two important ways: as a representative of the critically important, early-diverging lineage leading to plants; and as a microbe retaining important features of the last eukaryotic common ancestor (LECA) that has been lost in the highly studied yeast lineages. Its cell biology has been studied for ...

Cell division in plants is controlled by the activity of cyclin-dependent kinase (CDK) complexes. Although this basic mechanism is conserved with all other eukaryotes, plants show novel features of cell-cycle control in the molecules involved and their regulation, including novel CDKs showing strong transcriptional regulation in mitosis. Plant development is characterized by indeterminate growt...

Although rapid progress is being made in many areas of molecular cardiology, issues pertaining to the origins of heart-forming cells, the mechanisms responsible for cardiogenic induction, and the pathways that regulate cardiomyocyte proliferation during embryonic and adult life remain unanswered. In the present study, we review approaches and studies that have shed some light on cardiomyocyte c...

Cancer is frequently considered to be a disease of the cell cycle. As such, it is not surprising that the deregulation of the cell cycle is one of the most frequent alterations during tumor development. Cell cycle progression is a highlyordered and tightly-regulated process that involves multiple checkpoints that assess extracellular growth signals, cell size, and DNA integrity. Cyclin-dependen...

Cell-division control affects many aspects of development. Caenorhabditis elegans cell-cycle genes have been identified over the past decade, including at least two distinct Cyclin-Dependent Kinases (CDKs), their cyclin partners, positive and negative regulators, and downstream targets. The balance between CDK activation and inactivation determines whether cells proceed through G1 into S phase,...