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hair related research references
Proc R Soc Lond B Biol Sci. 1978 Dec 4;203(1151):209-18.
The coding of sound pressure and frequency in cochlear hair cells of the terrapin.
Fettiplace R, Crawford AC.
Intracellular recordings have been made from single hair cells in the cochlea of the terrapin, and the site of recording has been verified by injection of a fluorescent dye through the recording electrode. A hair cell gives periodic voltage responses graded with the intensity and frequency of the sound stimulus, and produces the largest response at its characteristic frequency. When small current steps are injected through the recording electrode, the voltage response of the cell exhibits damped oscillations at its characteristic frequency. The results are consistent with the idea that the cochlear frequency selectivity arises in two stages and it is suggested that the second stage resides within the hair cell itself.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=33392&dopt=Abstract
Berufsdermatosen. 1976 Jun;24(3):78-84.
[Peripheral circulatory disorders and acrocyanosis in arsenic exposed Moselle wine-growers]
[Article in German]
Grobe VJ.
Peripheric circulatory disturbances and acrocyanosis in Moselle vinedressers injured by arsenic. During the years 1972--1975 a total number of 100 vine-dressers came for medical treatment because of late injures caused by arsenic intoxication. That is an average of 400 examinations per year 1600 control examinations within four years. These patients belonged to the age-classes 1890--1923, and the average time of exposure to arsenic was 20 years. After years of being exposed to arsenic, and even years after the exposure to it has stopped, there are those so-called late injures caused by arsenic. There are typical arsenic melanisms on the forehad-temple-rim where the hair begins to grow, on the nape of the neck, on the shoulders, chest, arms, and on the back of the hands which pass into precanceroses and carcinomas. The average time until the first late injuries caused by arsenic occur is 26 years. However, there have been latence periods of up to 50 years. This depends mainly on the amount of arsenic absorbed during the time. There are skin alterations which resemble very much an acrodermatitis chronica atrophicans Herxheimer. Histological examinations rather showed the symptoms of an endangiitis obliterans with atrophy of the cutis. These symptoms were found in 60--70% of the 50--60 years old patients, in 80--90% of the 60--70 years old patients, and in 90--95% of the 70--80 years old patients. Simultaneously there are distinct peripheric circulatory disturbances, cyanosis of the lips, dyspnoea, and an emphysema together with typical cardiac insufficiency. Foot and finger pulse are distinctly slower, and the temperature of the skin is remarkably lower. While people grow older the cyanosis gets worse. With a control group of patients who hadn't been exposed to arsenic these symptoms had only been found on 1--2%.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=133669&dopt=Abstract
Biotech Histochem. 2000 Nov;75(6):245-50.
Supravital methylene blue staining of piloneural complexes of common fur hair follicles in the rat.
Muller T.
Institute for Anatomy, University of Mainz, Germany. tmuelleail.uni-mainz.de
Light microscopic observations employing supravital methylene blue staining are presented for piloneural complexes of common fur hairs in the mystacial pad of the rat snout. The investigation revealed anatomical details of piloneural complexes belonging to follicles of both vellus and guard hairs. In the methylene blue stained preparations, different types of palisade-like lanceolate nerve fiber endings could be discriminated. The thicker vellus and thinner guard hairs (hair diameter: 15-25 microm) exhibited a different innervation pattern compared to the thicker guard hairs, and two subtypes of piloneural complexes could be distinguished. Both subtypes were characterized by slightly stained lanceolate endings and the absence of a circular nerve fiber plexus. One subtype, however, showed strongly stained spines originating from the lanceolate endings. A few spines of adjacent lanceolate endings appeared in contact with each other. In the second subtype, these spines were replaced by anastomoses suggesting a delicate terminal nerve fiber network. The moderately stained lanceolate endings located primarily at the follicles of thicker guard hairs (hair diameter: 30-40 microm) showed smooth outlines, but were characterized by the occurrence of an intensely stained additional circular nerve fiber plexus. The differences in the morphology of piloneural complexes associated with the follicles of common fur hairs suggest differences regarding their mechanoreceptive tasks.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11131564&dopt=Abstract
J Investig Dermatol Symp Proc. 2003 Jun;8(1):96-9.
Characterization of human keratin-associated protein 1 family members.
Shimomura Y, Aoki N, Rogers MA, Langbein L, Schweizer J, Ito M.
Department of Dermatology, Niigata University School of Medicine, Niigata, Japan. yshimed.niigata-u.ac.jp
Keratin-associated proteins are involved in the formation of the cross-linked network of the keratin-intermediate filament proteins that support hair fibers. In recent years, several keratin-associated protein genes have been identified and become an attractive topic in hair research. More recently, we isolated two cDNA encoding novel members of the human keratin-associated protein 1 family (human keratin-associated protein 1.6 and human keratin-associated protein 1.7), and described their expression in the hair follicle by RNA in situ hybridization. A comparison of human keratin-associated protein 1.6 and human keratin-associated protein 1.7 with other human keratin-associated protein 1 members revealed that keratin-associated protein 1 proteins are fundamentally composed of five distinct domains, and that they can be classified primarily by a striking variation in double cysteine-containing pentapeptide repeats in the repetitive I domain. The sum of the data analyzed suggests that human keratin-associated protein 1 family genes may have arisen mainly through gene duplication of the cysteine-repeat motifs during evolution.
online pharmacy ref. source: www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12895003&dopt=Abstract [PubMed - in process]
Beautiful, dense hair is a dream for many people.
Hair growth is a sophisticated biological process, which has not yet been understood.
A multitude of therapeutic measures, including drugs, surgery, and suppelements have been developed.
However, due to the diversity of the problems underlying hair loss, there is no single solution that
can address all hair loss cases. Another problem is that most of chemical drugs and hair transplantation
surgeries are not free from varying degrees of undesirable side effects on health.
Anecdotally, it shows prositive results and improvement especially for age-related hair thinning and hair loss
for a large group of people who take it as suggested. Although personal experiences and anecdotal evidences
indicate that it works, we still do not understand the mechanisms of action as to how Hair Million works to
help stop hair loss, and promote hair growth. There has been no clinical trials nor placebo controlled statistical
analysis on the efficacy of Hair Million on hair loss and hair growth. R & D costs dearly, and no one would
afford to research complex herbal ingredients, which are often not patentable at all because they are
made by mother nature.
DHEA has been suggested to provide numerous potential benefits. DHEA (or dehydroepiandrosterone) is converted into androgens (male hormones)
or estrogens (female hormones) in the cells.
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