Archives for: December 2011


Permalink 02:28:10 pm, Categories: Hair Loss, 10 words   English (US)

Hair loss Treatment

Hair Loss treatment

Hair loss treatment at the Proctor Clinic



Permalink 03:59:39 pm, Categories: Hair Loss, 122 words   English (US)

Hair loss treatment methodologies

Z Hautkr. 1990;65(12):108o

Assessment of Hair-loss treatment methods,

Schell H.

With regard to hair regrowth induced by therapeutics, we must consider the activity of the hair follicle. This means that a study on the efficacy of hair regrowth treatments requires investigation of different kinds of follicular activity. The decision which technique depends on the reliability of the method in relation to the technical requirement, on the one hand, and the acceptance by the volunteer as well as the clinical type and degree of hair loss, on the other. Trichorhizogram results as the only means of evaluating the efficacy of hair growth therapeutics seem problematical, since an increase of the anagen rate does not absolutely correlate with a prolongation of the anagen phase.



Permalink 07:37:00 am, Categories: Hair Loss and Hair regrowth, 16 words   English (US)

A couple hair loss blogs

A couple of Hair loss blogs

hair loss blog mdst

hair loss blog at



Permalink 07:01:18 am, Categories: Hair Loss and Hair regrowth, 285 words   English (US)

Red Hair as an Example of Loss of Function alleles

PLoS One. 2011;6(11):e28145. Epub 2011 Nov 29.

Detecting Low Frequent Loss-of-Function Alleles in Genome Wide Association Studies with Red Hair Color as Example.

Liu F, et al


Multiple loss-of-function (LOF) alleles at the same gene may influence a phenotype not only in the homozygote state when alleles are considered individually, but also in the compound heterozygote (CH) state. Such LOF alleles typically have low frequencies and moderate to large effects. Detecting such variants is of interest to the genetics community, and relevant statistical methods for detecting and quantifying their effects are sorely needed. We present a collapsed double heterozygosity (CDH) test to detect the presence of multiple LOF alleles at a gene. When causal SNPs are available, which may be the case in next generation genome sequencing studies, this CDH test has overwhelmingly higher power than single SNP analysis. When causal SNPs are not directly available such as in current GWA settings, we show the CDH test has higher power than standard single SNP analysis if tagging SNPs are in linkage disequilibrium with the underlying causal SNPs to at least a moderate degree (r(2)>0.1). The test is implemented for genome-wide analysis in the publically available software package GenABEL which is based on a sliding window approach. We provide the proof of principle by conducting a genome-wide CDH analysis of red hair color, a trait known to be influenced by multiple loss-of-function alleles, in a total of 7,732 Dutch individuals with hair color ascertained. The association signals at the MC1R gene locus from CDH were uniformly more significant than traditional GWA analyses . The CDH test will contribute towards finding rare LOF variants in GWAS and sequencing studies.

Edited for hair loss treatment and hair regrowth blog use


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