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icon10.gif   Kopfhautmassage hilft (vielleicht doch) [Beitrag #358892] :: Sa., 27 Februar 2016 20:34 Zum vorherigen Beitrag gehen
http://www.ncbi.nlm.nih.gov/pubmed/26904154

Zitat:
"Standardized Scalp Massage Results in Increased Hair Thickness by Inducing Stretching Forces to Dermal Papilla Cells in the Subcutaneous Tissue.
Koyama T1, Kobayashi K2, Hama T3, Murakami K3, Ogawa R4.
Author information
Abstract
OBJECTIVE:

In this study, we evaluated the effect of scalp massage on hair in Japanese males and the effect of stretching forces on human dermal papilla cells in vitro.
METHODS:

Nine healthy men received 4 minutes of standardized scalp massage per day for 24 weeks using a scalp massage device. Total hair number, hair thickness, and hair growth rate were evaluated. The mechanical effect of scalp massage on subcutaneous tissue was analyzed using a finite element method. To evaluate the effect of mechanical forces, human dermal papilla cells were cultured using a 72-hour stretching cycle. Gene expression change was analyzed using DNA microarray analyses. In addition, expression of hair cycle-related genes including IL6, NOGGIN, BMP4, and SMAD4 were evaluated using real-time reverse transcription-polymerase chain reaction.
RESULTS:

Standardized scalp massage resulted in increased hair thickness 24 weeks after initiation of massage (0.085 ± 0.003 mm vs 0.092 ± 0.001 mm). Finite element method showed that scalp massage caused z-direction displacement and von Mises stress on subcutaneous tissue. In vitro, DNA microarray showed gene expression change significantly compared with nonstretching human dermal papilla cells. A total of 2655 genes were upregulated and 2823 genes were downregulated. Real-time reverse transcription-polymerase chain reaction demonstrated increased expression of hair cycle-related genes such as NOGGIN, BMP4, SMAD4, and IL6ST and decrease in hair loss-related genes such as IL6.
CONCLUSIONS:

Stretching forces result in changes in gene expression in human dermal papilla cells. Standardized scalp massage is a way to transmit mechanical stress to human dermal papilla cells in subcutaneous tissue. Hair thickness was shown to increase with standardized scalp massage."


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Vorheriges Thema: Spironolacton-Lösung
Nächstes Thema: Harel et al. (2015). Pharmacologic inhibition of JAK-STAT signaling promotes hair growth
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