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Hautarzt 2002 Dec;53(12):798-804
TrichoScan. A new instrument for digital hair analysis
BACKGROUND/OBJECTIVE: Hair loss or hair thinning is a common complaint in clinical dermatology. Patients seeking advice for hair loss are not necessarily bald. In addition, the effects of therapy are hard to measure. Consequently, there is a need for a sensitive tool to monitor hair loss and treatment response. Such a method must be able to analyze the biological parameters of hair growth, which are: 1: hair density (n/cm(2)), 2: hair diameter (micrometer), 3: hair growth rate (mm/day) and 4: anagen/telogen ratio. PATIENTS/METHODS: We present the TrichoScan as a method which combines epiluminescence microscopy (ELM) with automatic digital image analysis for the measurement of human, and potentially animal hair, in situ. The TrichoScan is able to analyze all biological parameters of hair growth with a so called intraclass correlation of approximately 91% within the same operator and an intraclass correlation of approximately 97% for different operators. RESULTS: The application of the technique is demonstrated by comparison of the hair parameters in individuals without apparent hair loss with men with untreated AGA and men after treatment with finasteride (1 mg/day), and women who were treated with minoxidil. We were able to detect a significant increase in hair counts and cumulative hair thickness 3 and 6 months after treatment. CONCLUSION: The advantage of the TrichoScan is that it can be used for clinical studies to compare placebo versus treatment or to compare different hair growth promoting substances, it can be used for studying AGA or other forms of diffuse hair loss, and it can be adopted to study the effect of drugs or laser treatment on hypertrichosis or hirsutism.
Dermatol Surg 2002 May;28(5):394-400; discussion 401
A method for evaluating and treating the temporal peak region in patients with male pattern baldness.
BACKGROUND: In the past, hair restoration surgeons have focused most of their attention and efforts on the reconstruction of the hairline region and the area on top of the head. However, little attention has been given to the temporal peaks and the areas immediately posterior to them. OBJECTIVE: The goals of this article are to describe the pattern baldness process at the temporal peaks and the region immediately posterior to them, and to describe a method for the evaluation and treatment of these very important and often neglected areas. METHODS: A method for evaluating and grading the temporal peak region is given. A surgical technique for treating this problem is described. This method consists of making 1.0 mm spear blade incisions at a very acute 10 degrees angle in the newly designed anterior peak and in between the hair follicles that remain in the area posterior to the peak. The grafting of the finest one-haired grafts available in between existing hair follicles is accomplished with the help of 3.5x expandable loupes. The anterior temporal peak design is coordinated with the position of the frontal hairline restoration; the more anterior the hairline, the more anterior the temporal peak and vice-versa. RESULTS: The results of evaluating the temporal peak areas and treating them appropriately have consistently restored the cosmetic harmony between the frontal hairline and the temporal peak region. It is important, however, to only utilize the finest hairs available to create an aesthetically pleasing result. CONCLUSION: When evaluating patients for hair restoration surgery, it should be a common practice to evaluate the temporal peak regions and the areas immediately posterior to them. These areas should be appropriately treated so that the frontal hair restoration coordinates with that of the temporal peak. The further anterior one comes with the hairline, the more anterior must come with the temporal peak restoration and vice-versa.
Support Care Cancer. 2003 Jun;11(6):371-7. Epub 2003 Mar 21.
Scalp hypothermia to prevent chemotherapy-induced alopecia is effective and safe: A pilot study of a new digitized scalp-cooling system used in 74 patients.
GOALS. The aim of this study was to examine the efficacy and safety of a new digitized, controlled, scalp-cooling system to prevent chemotherapy-induced alopecia. METHOD. Seventy-four female cancer patients who received 13 varying chemotherapy regimens were included in a nonrandomized pilot study. The Digni 2-3 with Dignicap system consists of a refrigerator unit and a control unit integrated into a mobile cabinet and connected to a tight-fitting cooling cap. This system maintains a constant scalp temperature of +5 degrees C for many hours. In this study, 60 patients were treated for ovarian cancer with either taxane or epirubicin combination chemotherapy. Eight patients with Hodgkin's lymphoma, three with breast cancer, two with endometrial cancer, and one with sarcoma were also included. Photo documentation and patient assessment of hair loss and discomfort were performed. RESULTS. In anthracycline-treated patients, total prevention of hair loss was observed, whereas hair loss in paclitaxel/docetaxel-treated patients was minimal to none. The combination of anthracycline and taxane resulted in more hair loss, but only three of six patients used a wig. Scalp cooling was generally very well tolerated; only two of 74 patients discontinued use of the cold cap due to discomfort. No scalp metastases occurred over a median follow-up period of 15 months. CONCLUSIONS. The digitized, controlled, scalp-cooling system represents an effective and safe device that should be clinically evaluated in a randomized trial and in studies using other chemotherapy regimens to determine optimal temperatures and durations of cooling for maximal efficacy.
Br J Dermatol. 2003 Mar;148(3):553-7.
Compound heterozygosity for mutations in the hairless gene causes atrichia with papular lesions.
BACKGROUND: Congenital atrichias represent a complex and heterogeneous group of genodermatoses, which have been shown in several consanguineous families to result from homozygous mutations in the hairless gene (HR). OBJECTIVES: To identify the molecular basis of congenital atrichia in a non-consanguineous family. METHODS: Genetic analysis was carried out in a two-generation family with two children with congenital atrichia and one healthy child. RESULTS: We established a diagnosis of atrichia with papular lesions based on clinical and histopathological data. We identified a heterozygous 11-bp deletion (189-199del) in the two affected children and their mother. In addition, the two affected children and their father were shown to carry a non sense mutation (Q478X), which has previously been described in a Pakistani family. Haplotype analysis revealed that mutation Q478X occurred independently in the two families. CONCLUSIONS: We have identified the first case of compound heterozygosity for mutations in HR as well as the first instance of a recurrent mutation in this gene. These data further expand our understanding of the molecular pathomechanisms underlying congenital atrichias.
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