Annotation. Malignant and benign skin neoplasms are multifactorial diseases, the development of which is perhaps most related to environmental factors. The search for constitutional markers predicting occurrence these cancers has become one promising areas research in field oncology. aim study was establish features transverse body sizes Ukrainian men with nevi. In (aged 22-35 years) nevi (mela...

The biological and enzymic behaViDr of embryonic melanocytes and their cellular interaction in differentiating follicular and epidermal structures after leaving their dermal environment through the penetration of the dermalepidermal junction has not been significantly studied, although their neural crest origin (1) and developmental process within the dermis including their epidermal entry (2) ...

A cut was made on the middorsal skin of mice of various ages of strain C57BL/0J using fine iridectomy scissors. Specimens from the wounded skins were fixed at various days after wounding and were subjected to the dopa reaction and to the combined dopa-premelanin reaction. When the dorsal skins of 1.5-day-old mice were wounded, the melanocyte population positive to the dopa reaction as well as t...

Regenerative medicine for complex tissues like limbs will require the provision or activation of precursors for different cell types, in the correct number, and with the appropriate instructions. These strategies can be guided by what is learned from spectacular events of natural limb or fin regeneration in urodele amphibians and teleost fish. Following zebrafish fin amputation, melanocyte stri...

Utilization of adult stem cells in regenerative therapies may require a thorough understanding of the mechanisms that establish, recruit and renew the stem cell, promote the differentiation of its daughters, or how the stem cell is repressed by its target tissue. Regeneration of melanocytes in the regenerating zebrafish caudal fin, or following larval melanocyte-specific ablation, or recruitmen...

Melanocyte regeneration in epidermis (e.g., vitiligo) and matrix of hair follicle graying hair) is quite dependent on the migration melanocyte precursors located follicle. We have demonstrated that casein kinase (CK) 1 ablation keratinocytes increases eumelanin production epidermal numbers. Here we further evaluate effect CK1 inhibition first established Fusion Red-labelled-melanocyte reporter ...

Like all primary cells in vitro, normal human melanocytes exhibit a physiologic decay in proliferative potential as it transitions to a growth-arrested state. The underlying transcriptional program(s) that regulate this phenotypic change is largely unknown. To identify molecular determinants of this process, we performed a Bayesian-based dynamic gene expression analysis on primary melanocytes u...

Trunk neural crest (NC) cells differentiate to neurons, melanocytes, and glia. In NC cultures, cyclic AMP (cAMP) induces melanocyte differentiation while suppressing the neuronal sympathoadrenal lineage, depending on the signal intensity. Melanocyte differentiation requires activation of CREB and cAMP-dependent protein kinase A (PKA), but the role of PKA is not understood. We have demonstrated,...

The aim of this study was to describe and analyze the regulation and spatio-temporal dynamics of melanocyte migration in vitro and its coupling to cell division and interaction with the matrix. The melanocyte lineage is particularly interesting because it is involved in both embryonic development and oncogenesis/metastasis (melanoma). Biological experiments were performed on two melanocyte cell...