Phenotype

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Survival of the Sickest: A Medical Maverick Discovers Why We Need Disease Dr. Sharon Moalem See book keywords and concepts

So, in this hypothetical example, if a methyl marker turned off your gene for detached earlobes, your phenotype would change— you'd have attached earlobes—but your genotype would remain the same. You'd still have the gene for detached earlobes to pass on to your children in either the on or off state; it would just be deactivated in you.) According to the thrifty phenotype hypothesis, fetuses that experience poor nutrition develop "thrifty" metabolisms that are much more efficient at hoarding energy.

Interview with Dr. Gabriel Cousens, raw foods pioneer and founder of the Tree of Life Rejuvenation Center Mike Adams, the Health Ranger See article keywords and concepts

Cousens: We have what's known as genotype and phenotype. Genotype is your hard-core hard drive; phenotype is your software. You can't change your genotype, but you can change the expression of the genotype, which is the phenotype. So basically, your anti-inflammation, anti-aging, anti-cancer, antioxidant genes all got turned on. That was Dr. Spindler at the University of California at Riverside. Now, what's happening? This is very important: When you cook your food, you lose 50 percent of the protein. It becomes coagulated and you lose 78 percent of the vitamins and minerals.

Survival of the Sickest: A Medical Maverick Discovers Why We Need Disease Dr. Sharon Moalem See book keywords and concepts

According to the thrifty phenotype hypothesis, fetuses that experience poor nutrition develop "thrifty" metabolisms that are much more efficient at hoarding energy. When a baby with a thrifty phenotype was born 10,000 years ago during a time of relative famine, its conservationist metabolism helped it survive. When a baby with a thrifty metabolism is born in the twenty-first century surrounded by abundant food (that is also often nutritionally poor but calorie rich), it gets fat.

The Science of Flavonoids Erich Grotewold See book keywords and concepts

This was corroborated by the finding of the same phenotype in loss-of-function mutants of ZmMRP3, an anthocyanin transporter gene, and BZ2 in maize (Goodman et al., 2004). GSTs are multifunctional enzymes and one of their most interesting functions is detoxification of exogenous substrates, such as herbicides, by conjugation with glutathione (Edwards et al., 2000; Dixon et al., 2002).

Survival of the Sickest: A Medical Maverick Discovers Why We Need Disease Dr. Sharon Moalem See book keywords and concepts

Epigenetics makes the thrifty phenotype hypothesis even more compelling, because it helps us to understand how a mother's eating habits could affect the metabolic makeup of her children. If you're thinking about having a baby, you're probably already asking yourself what you should eat and when during your pregnancy. We don't know enough yet to understand exactly when human fetuses reach epigenetic trigger points. But animal studies suggest the process starts very early.

It's possible that this effect is analogous to the thrifty phenotype, in which poor maternal nutrition in the early stages of pregnancy leads to the birth of small babies with thrifty metabolisms who have a high tendency to become fat. In this case, there may be an epigenetic change in the father's sperm triggered by the toxins in the smoke the father is inhaling. Those toxins would indicate a difficult environment, so the sperm is ready to create a baby with a thrifty metabolism.

Hunger Free Forever: The New Science of Appetite Control Michael T. Murray and Michael R. Lyon See book keywords and concepts

The reason why diet and lifestyle are so much more important than genetic factors in influencing body weight, insulin sensitivity, and type 2 diabetes is the difference between the genotype and its actual expression, phenotype. Genotype refers to a particular genetic code. Pheno-type, on the other hand, represents the actual expression of the genetic information. For example, even though identical twins have the exact same genetic information, they have different fingerprints. With the thrifty genotype, there is an even higher degree of "phe-notypic plasticity.

The Science of Flavonoids Erich Grotewold See book keywords and concepts

As further evidence that glutathionation activity is not required for normal accumulation of anthocyanins, site-directed mutagenized BZ2 proteins, in which the amino acid that is important for glutathionation activity in animal and insect GSTs is mutated, did complement the null-mutant phenotype of bz2 (Mueller and Walbot, 2001). As flavonoid-specific carrier proteins, GSTs have been proposed to prevent oxidation of flavonoids within the cytosol and/or deliver "flavonoid cargo" directly to the membrane-bound transporters (Mueller and Walbot, 2001).

They further found that treating cultured maize cells with vanadate, an inhibitor of ABC-type transporters, conferred a flavonoidless phenotype, which mimicked the bz2 mutant. These results strongly suggested that an ABC-type transporter was required for vacuolar uptake of anthocyanins in maize via the presumptive formation of anthocyanin-glutathione conjugates by BZ2 (Marrs et al., 1995). In mung bean, the uptake of the isoflavonoid medicarpin by isolated vacuolar membrane vesicles was found to be accelerated by Mg-ATP and to be strongly inhibited by vanadate (Li et al., 1997).

An activation-tagged mutant, papl-D, accumulated large amounts of secondary metabolites including anthocyanins. This phenotype resulted from activation of a MYB transcriptional factor, PAP1 (Borevitz et al, 2000). Tohge et al. (2005) investigated the gene expression profile as well as metabolic profiles in plants overexpressing PAP1 and identified many flavonoid structural genes and two transporterlike genes that were induced. The two transporterlike genes were classified as "sugar transporterlike" proteins, rather than MATE-type transporters.

Consequently, the transparent testa (tt) phenotype, characteristic of Arabidopsis flavonoid mutants (Figure 4.1), can be observed only in the progeny of a plant homozygous for the mutation. Flavonols are also largely represented in Arabidopsis seeds, but these compounds accumulate both in the embryo and in the integuments. Along with PA, they contribute to the seed quality of many important crops.

Transdermal Magnesium Therapy Mark Sircus See book keywords and concepts

He concluded that magnesium deficiency alters cellular and mitochondrial function and accelerates the senescent phenotype and may promote or exacerbate age-related disease.43 Others interested in the aging process, like Dr. Norman Shealy, have given us much information on the values of transdermal magnesium therapy because his experience is that transdermal application of magnesium chloride alone has the ability to raise an important marker of aging - DHEA levels.

Interview with Dr. Gabriel Cousens, raw foods pioneer and founder of the Tree of Life Rejuvenation Center Mike Adams, the Health Ranger See article keywords and concepts

Genotype is your hard-core hard drive; phenotype is your software. You can't change your genotype, but you can change the expression of the genotype, which is the phenotype. So basically, your anti-inflammation, anti-aging, anti-cancer, antioxidant genes all got turned on. That was Dr. Spindler at the University of California at Riverside. Now, what's happening? This is very important: When you cook your food, you lose 50 percent of the protein. It becomes coagulated and you lose 78 percent of the vitamins and minerals. If you go live, you can eat half as much and still get the same amount.

Sugar Shock!: How Sweets and Simple Carbs Can Derail Your Life-- and How YouCan Get Back on Track Connie Bennett, C.H.H.C. with Stephen T. Sinatra, M.D. See book keywords and concepts

Intravenous Cocaine and Heroin Self-Administration in Rats Selectively Bred for Differential Saccharin Intake: phenotype and Sex Differences." Psychopharmacology 161, no. 3 (2002): 304—13. Chocolate Manufacturers Association website, http://www.chocolateusa.org/resources/statistical-infor mation.asp. Colantuoni, Carlo, Pedro Rada, Joseph McCarthy, Caroline Patten, Nicole M. Avena, Andrew Chadeayne, and Bartley G. Hoebel. "Evidence That Intermittent, Excessive Sugar Intake Causes Endogenous Opioid Dependence." Obesity Research 10, no. 6 (2002): 478-88. Colantuoni, Carlo, J. Schwenker, J.

Survival of the Sickest: A Medical Maverick Discovers Why We Need Disease Dr. Sharon Moalem See book keywords and concepts

An examination of birth records following the famine is one of the ways Barker confirmed his thrifty netnyi riaaness: t\oaa to me rinai rnenotype 16/ phenotype hypothesis. Women who were in the first six months of pregnancy during the Hongerwinter gave birth to small babies who grew up to be more prone to obesity, coronary disease, and a variety of cancers. Although the results are still controversial, researchers reported an even bigger surprise around twenty years later when their studies indicated that the grandchildren of those women were also born with low birth weights.

The Myth of Alzheimer's: What You Aren't Being Told About Today's Most Dreaded Diagnosis Peter J. Whitehouse and Daniel George See book keywords and concepts

Her cardiologist mailed her results as a printout, which included the information that she expressed two copies of the E-4 allele of the ApoE gene, and that this phenotype had been found to be a susceptibility marker for CVD. Concerned by her genetic profile, and unsure what all the jargon meant, the woman went to the library to conduct her own research. Through this she found out that she was not only at risk for cardiovascular disease, she was at more risk to develop Alzheimer's disease than those who have two of the more common ApoE-3 alleles.

Nutrition in the Prevention and Treatment of Disease Ann M. Coulston and Carol J. Boushey See book keywords and concepts

Unique lipoprotein phenotype and genotype associated with exceptional longevity. JAMA 290, 2030-2040. 248. Cellini, E., Nacmias, B., Olivieri, F, et al. (2005). Cholesteryl ester transfer protein (CETP) I405V polymorphism and longevity in Italian centenarians. Mech. Ageing Dev. 126, 826-828. 249. Santamarina-Fojo, S., Gonzalez-Navarro, H., Freeman, L., Wagner, E., and Nong, Z. (2004). Hepatic lipase, lipoprotein metabolism, and atherogenesis. Arterioscler. Thromb. Vase. Biol. 24, 1750-1754. 250. Murtomaki, S., Tahvanainen, E., Antikainen, M., et al. (1997).

If an allele is rare and if two copies (homozygocity) of a mutation are required for the phenotype to be expressed, then homozygotes are usually found only in highly consanguineous (inbred) families. Gene Name Chromosomal Locus Function of Gene Product Relative to Obesity Brain-derived neurotrophic factor 1 lpl3 (BDNFf Corticotropin-releasing hormone 17ql2-q22 receptor 1 {CRHRlf Corticotropin-releasing hormone 7p21-pl5 receptor 2 (CRHR2)h G-protein-coupled receptor 24 22ql3.3 (GPR24)b Leptin (LEP)b 7q31.3 Leptin receptor {LEPR)b 1 p31 Melanocortin 3 receptor (MC3R)h 20q 13.

GENE-GENE INTERACTIONS Gene-gene interactions are likely a universal phenomenon in common human diseases and may be more important in determining the phenotype than the independent main effects of any one susceptibility gene [17, 18]. A classic example of the effect of gene-gene interactions on a complex trait comes from mouse studies. The severity of diabetes in both Lepoh (leptin) and Leprdb (leptin receptor) mutant mice is determined by the genetic background upon which the mutation is expressed.

Incomplete penetrance means that not all individuals who have the gene mutation develop the phenotype. 4 Genetic heritability is the percentage of interindividual variation in a trait that is explained by genetic factors. Twin Studies Nuclear Families V/A Adoption Studies HUH Community Studies ¦¦ Combined Data FIGURE 1 Heritability of obesity as determined by different study types. (Data for studies of twins, nuclear families, and adoption studies are taken from [1]. Data for community-based studies are taken from [102]. Range of heritability estimated from all study types is taken from [5].

Associations between catalase phenotype and genotype: modification by epidemiologic factors. 98.1. Cancer Epidemiol, Biomarkers Prev. 15(6), 1217-1222. 99. Ukkola, O., Erkkila, P. H., Savolainen, M. J., and Kesaniemi, Y. A. (2001). Lack of association between polymorphisms of catalase, copper-zinc superoxide dismutase (SOD), extracellular SOD and endothelial nitric oxide synthase genes and macroangiopathy in patients with type 2 diabetes mellitus. /. Intern. Med. 249(5), 451^159. 100. Hu, Y. J., and Diamond, A. M. (2003).

The Science of Flavonoids Erich Grotewold See book keywords and concepts

Identification of Active Transposable Elements in Sorghum and Morning Glories In sorghum, the high frequency of somatic and germinal reversions of Yl-cs to Yl-rr led to the hypothesis that the Yl-cs phenotype may be the consequence of the presence of a transposable element in the Yl gene (Zanta et al, 1994), bearing a marked resemblance to the maize Pl-vv allele (Chopra et al., 1999). Making use of the similarities in the phlobaphene accumulation patterns, the Yl-cs allele allowed the identification of the only known active transposable element Candystripel (Csl) in sorghum.

There Is a Cure for Diabetes: The Tree of Life 21-Day+ Program Gabriel Cousens See book keywords and concepts

In essence, genotype is analogous to a computer's hard drive. phenotype is the way the genes express themselves, which can vary according to the signaling systems that we give them through our diet and lifestyle. Phenotypic expression is analogous to our software programs. Put a healthy program in, and we get a healthy response. Since 1922, when Frederick Banting and Charles PL Best discovered insulin, which was a great contribution and saved many lives, we have taken a more medical or drug-based approach to the treatment of diabetes.

The Missing Gene: Psychiatry, Heredity, and the Fruitless Search for Genes Jay Joseph See book keywords and concepts

In other words, the same "schizophrenia phenotype" utilized in the search for genes is used for marker searches as well. According to schizophrenia researchers M. F. Egan and colleagues, "Most studies of intermediate phenotypes begin by looking for a difference between first-degree relatives and controls."3 First-degree relatives of whom? The answer is, of course, of people diagnosed with schizophrenia according to the DSM, that is, the same faulty diagnostic scheme that necessitated the search for biological markers in the first place.

An environmentally-induced phenotype that mimics one caused by, or is believed to be caused by, genetic factors. Phenotype. An observable trait or characteristic of an organism. For example eye color, weight, or the presence or absence of a disease. PKU (Phenylketonuria). An inherited metabolic disorder in which the body cannot metabolize an amino acid called phenylalanine. Can result in mental retardation and other neurological problems. If detected early enough, the condition can be prevented by means of a special diet. Poliomyelitis (Polio).

Primal Healing: Access the Incredible Power of Feelings to Improve Your Health Dr. Arthur Janov See book keywords and concepts

Appearances and Essences Another way of looking at the difference between awareness and consciousness is that of appearances versus essences—of phenotype (appearance) versus genotype (generating sources). An approach of appearances is always individual, while that of essences is universal, generating universal laws. Essence is stable while appearances are transient. Essence is historic; appearances are ahistoric. Essences are few; appearances are multitudinous (an endless therapeutic search down the most complex, labyrinthine behaviors).

The Encyclopedia of Healing Foods by Michael Murray, N.D. and Joseph Pizzorno, N.D. See book keywords and concepts

Your genes certainly play an important role, but the way in which they are actually expressed, your phenotype, is largely determined by the foods you eat. Whether you are in a state of poor health or simply desire better health, improving the quality of the foods you regularly consume is a must. Simply following the recommendations given for designing a healthy diet using the guidelines in chapter 2 has the potential to be quite therapeutic for most common illnesses. However, many medical conditions can be further benefited by more specific recommendations.

What's In Your Milk?: An Exposé of Industry and Government Cover-Up on the Dangers of the Genetically Engineered (rBGH) Milk You're Drinking Samuel S. Epstein, M.D. See book keywords and concepts

IGF-1, and related growth factors, have been clearly incriminated in maintaining the malignant phenotype of breast cancer (Lippman, 1992). Finally, contrary to Bier, other authorities also share my concerns on public health risks of IGF-1 in rBST milk. ¦ "...concern arises as to the possibility of abnormal levels of IGF-1 in the milk of rBGH-treated cows and with it consumer health. There should be continual monitoring of milk for residues, especially IGF-1 and IGF-2" (McBride et al, 1988).

IGF-1 has also been incriminated in maintaining the malignant phenotype of human breast cancer. The undifferentiated prenatal and infant human breast is particularly susceptible to hormonal influences, so that imprinting by IGF-1 may not only itself constitute a potential breast cancer risk factor, but may also increase the sensitivity of the breast to subsequent unrelated carcinogenic risk factors. Such converging lines of evidence clearly raise unresolved questions on the role of IGF-1 in BST milk as a potential breast canter risk factor.

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