Doctor insights on:
Genetic Testing And Molecular Biomarkers
Prenatal testing for genetic problems may be done before or after conception. Testing for spina bifida or Down syndrome is done after a pregnancy is established. Besides the couples listed above, counseling and diagnosis are also recommended for mothers over the age of 35, and those who have received abnormal screening test results, such as alpha-fetoprotein (AFP). For more information about the alpha-fetoprotein test, and when and why you might have it, see alpha-fetoprotein. For those who may be at risk, genetic counseling and prenatal diagnosis are used to help ...Read more
Molecular Methods: Identifying alleles associated with disease can be done by numerous different methods depending on the type of genetic alteration. Gene sequencing is often the gold standard. However, for disease caused by deletion or insertion of a segment of DNA, a technique called Fluoresense In Situ Hybridization is used. For detection of single base pair changes numerous different techniques can be used ...Read more
Screening is done by: blood tests when family history, ethnicity or consanguinity confers risk of fetal inheritance of a mutant gene from both parents, thus, of having a disease. Screening for genetic accidents that cause chromosome anomalies is offered to all pregnant women. Folks with inherited disorders are counseled about risk of transmission. The disorder is explained to them & to women with + prenatal screens. ...Read more
Is a noninvasive prenatal paternity bloodtest, done with blood from alleged fathers, cfdna and 317.000 genetic markers a reliable test?
Alpha fetal protein: AFP is a fetal specific globulin, synthesized by the fetal yolk sac, gastrointestinal tract, and liver. The function of AFP is unknown. AFP blood levels can be measured during the second trimester to screen for open spina bifida and anencephaly, but can also uncover fetal abnormalities such as abdominal wall defects. AFP is also used in screening tests for downs syndrome and edwards syndrome. ...Read more
Which HIV tests are considered genetic?what the meaning of genetic test?is HIV DNA PCR a genetic test?and what type of test can detect all HIV types?
Yes: BRCA testing can be performed from either blood or saliva. A significant amount of DNA needs to be present for adequate testing so most companies require more than a finger stick blood draw. Usually a single blood tube containing 3 ccs of blood is adequate ...Read moreSee 2 more doctor answers
Yes: Brca1 and 2 mutation analysis is performed at myriad lab in usa. One can either use an oral swab or blood for testing. It is strongly recommended that the testing is done in the context of genetic counseling as the interpretation of the test and risk assessment for breast/ovarian cancer are complex and requires professional explanations. ...Read moreSee 1 more doctor answer
With bipolar ii, adhd, & c ptsd, what additional tests are beneficial? Ie: hormone, neurotransmitter , DNA mutation (mthfr, a1at ...) methylation etc.
Yes: I would definitely check mthfr and comt. Both these are involved in methylation. One is involved in neurotransmitter synthesis, and the other in breakdown. Therefore polymorphisms can impact mood, etc, and if so, vitamins and supplements can help the methylation cycle. I check mthfr in most of my patients. ...Read moreSee 4 more doctor answers
Replication error: Most changes in dna come from errors in the duplication of the dna. But changes can occur in the structure from radiation and some chemicals especially those used in chemotherapy. Most mutations are harmless, some are tracked down by your normal reparative mechanism but a few can cause trouble including cancer. ...Read more
How do dna, mutation, genotype, phenotype, and natural selection interconnect to cause evolution?
Modern synthesis: It's as well-established as anything in science, but would take more than 400 characters to explain. You owe it to yourself, as an educated person who must participate in community decision making, to understand it. There are a huge number of good books on the subject. Best wishes. ...Read more
What labs genetic te: All reputable national labs like quest, labcorp or lacal labs qualified to do th e tests can do it in us. ...Read more
What is the difference in gene sequencing tests vs gene deletion/duplication tests? Should one type of genetic test be done before the other?
Depends: Sequencing is like reading war and peace letter by letter, and deletion/duplication testing is like seeing if a chapter is completely missing or present as an extra copy. Which first? Depends on the condition. For duchenne muscular dystrophy, look for deletions first. For brca, sequence first. Your clinical geneticist can discuss the strategy with you. ...Read moreSee 1 more doctor answer
Geenetic consult: It is known that the heritability of heart disease is 45-55%, but only 10% of possible genetic causes have been found. Genetic testing usually begins by meeting with a genetic counselor and/or medical geneticist physician, individualized risk assessment; blood work for genetic testing when indicated. ...Read moreSee 2 more doctor answers
Sev. Dev. Delay -array comparative genetic hybridization (acgh) results indicate no abnormalities- would full genetic sequencing be advised (knome)?
Not necessarily: Newer genetic tests provide incite into a variety of issues like autism & other developmental variations.Yet causation remains elusive in many cases.Sadly, an injury to the developing brain centers from an unrecognized event in an otherwise normal pregnancy is a likely cause for many.This occurs in at least half of cerebral palsy cases & dev.Delay could be produced in others, yet hard to prove. ...Read more
From a medical standpoint, "genetic" refers to the potential heritability of various medical conditions. While some conditions are inevitable (at some point in one's life) as a consequence of simple genetic heritability (eg huntington's disease), a large number of medical conditions (including all behaviorial health disorders) are the expressed final pathway of a ...Read more