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News -07-06-06 Scientists Worry About Health Risks in Plastic Containers (ABC News) "BPA — sometimes indicated by a number 7 on products — is found mostly in strong plastics, such as nondisposable water bottles, baby bottles and in the lining of canned foods." "BPA — sometimes indicated by a number 7 on products — is found mostly in strong plastics, such as nondisposable water bottles, baby bottles and in the lining of canned foods." "While the Food and Drug Administration and the American Plastics Council insist BPA is safe, an outspoken biology professor and other scientists believe it may bring all kinds of harm — such as cancer, early puberty, obesity and even attention-deficit disorder." 07-06 Epigenetics (BBC News) "Epigenetics adds a whole new layer to genes beyond the DNA. It proposes a control system of 'switches' that turn genes on or off – and suggests that things people experience, like nutrition and stress, can control these switches and cause heritable effects in humans." 07-06 Epigenetics (The Scientist) "The Duke researchers showed that diet can dramatically alter heritable phenotypic change in agouti mice, not by changing DNA sequence but by changing the DNA methylation pattern of the mouse genome.3 'This is going to be just massive,' Jirtle says, 'because this is where environment interfaces with genomics.'" "This type of inheritance, the transmission of non-DNA sequence information through either meiosis or mitosis, is known as epigenetic inheritance." 07-06 Epigenetics (Wikipedia.org) "Epigenetics is the study of reversible heritable changes in gene function that occur without a change in the sequence of nuclear DNA. It is also the study of the processes involved in the unfolding development of an organism. In both cases, the object of study includes how gene regulatory information that is not expressed in DNA sequences is transmitted from one generation (of cells or organisms) to the next - that is (from the Greek prefix), 'in addition to' the genetic information encoded in the DNA." "Some say that environmentally dependent forms of cellular inheritance may be termed epigenetic." 07-06

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