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Lipid signaling: sleep, synaptic plasticity, and neuroprotection.

Increasing evidence indicates that bioactive lipids participate in the regulation of synaptic function and dysfunction. We have demonstrated that signaling mediated by platelet-activating factor (PAF) and cyclooxygenase (COX)-2-synthesized PGE2 is involved in synaptic plasticity, memory, and neuronal protection [Clark GD, Happel LT, Zorumski CF, Bazan NG. Enhancement of hippocampal excitatory synaptic transmission by platelet-activating factor. Neuron 1992; 9:1211; Kato K, Clark GD, Bazan NG, Zorumski CF. Platelet-activating factor as a potential retrograde messenger in CA1 hippocampal long-te

PKC gamma gene expression is delayed in postnatal central nervous system of mi/mi mice.

In the central nervous system (CNS), the expression of protein kinase C (PKC) genes is strictly controlled by the developmental stage. We have examined the expression of PKC genes (cPKC alpha, beta, gamma, and nPKC delta, epsilon) in the process of the postnatal development in normal (+/+) C57BL/6 and microphthalmic (mi/mi) C57BL/6 mouse brains by Northern blotting and in situ hybridization. By Northern blotting, the expression level of cPKC gamma mRNA in mi/mi mice was significantly lower than that in +/+ littermates at d 9, 13, and 17. By in situ hybridization analysis, cPKC gamma mRNA-posit

The effect of parenteral testosterone administration prior to hypospadias surgery: A prospective, randomized and controlled study.

INTRODUCTION: The goal of hypospadias surgery is to provide a functionally and cosmetically normal penis. Whether this goal will be to the patient's satisfaction depends largely on the original anatomy, surgical technique and surgeon's experience. It has been suggested that androgen administration is associated with better outcomes in hypospadias repair; however, few studies have included control groups and the issue is still controversial. PURPOSE: To evaluate the effects of parenteral testosterone administration on the results of hypospadias repair in children with untreated hypospadias. M

Vitiligo as a First Sign of Vogt-Koyanagi-Harada Disease.

Vogt-Koyanagi-Harada (VKH) disease is a multisystem disorder characterized by bilateral granulomatous panuveitis resulting in serous retinal detachments, disk edema, and a sunset glow fundus development. Furthermore, it is associated with various extraocular findings, such as tinnitus, hearing loss, vertigo, poliosis, and vitiligo (1). VKH is considered to be an autoimmune disease mediated by T-cells targeting melanocyte antigen tyrosinase peptide (2). Moreover, VKH more often occurs in individuals with a genetic predisposition to the disease, including those of Asian and Hispanic heritage (3)

Stephen L. Gans Distinguished Overseas Lecture. The neural crest in pediatric surgery.

AIM: This review highlights the relevance of the neural crest (NC) as a developmental control mechanism involved in several pediatric surgical conditions and the investigative interest of following some of its known signaling pathways. METHODS: The participation of the NC in facial clefts, ear defects, branchial fistulae and cysts, heart outflow tract and aortic arch anomalies, pigmentary disorders, abnormal enteric innervation, neural tumors, hemangiomas, and vascular anomalies is briefly reviewed. Then, the literature on clinical and experimental esophageal atresia-tracheoesophageal fistula

Molecular genetics and development of mast cells: implications for molecular medicine.

For a long time the biology of mast cells has remained an enigma. During the past few decades, molecular research has filled many of the gaps in our understanding of this multifunctional cell type. Several concepts are now established about the origin and development of mast cells. However, the mechanisms leading to autonomous proliferation of mast cells in patients with indolent or aggressive mastocytosis still require further investigation. This article focuses on the recent advances in the field of mast cell development and abnormal mast cell proliferation, and reviews data from the most si

EEC- and ADULT-associated TP63 mutations exhibit functional heterogeneity toward P63 responsive sequences.

TP63 germ-line mutations are responsible for a group of human ectodermal dysplasia syndromes, underlining the key role of P63 in the development of ectoderm-derived tissues. Here, we report the identification of two TP63 alleles, G134V (p.Gly173Val) and insR155 (p.Thr193_Tyr194insArg), associated to ADULT and EEC syndromes, respectively. These alleles, along with previously identified G134D (p.Gly173Asp) and R204W (p.Arg243Trp), were functionally characterized in yeast, studied in a mammalian cell line and modeled based on the crystal structure of the P63 DNA-binding domain. Although the p.Arg

Trichotillomania: Bizzare Patern of Hair Loss at 11-Year-old Girl.

Trichotillomania (TTM) is defined by the Diagnostics and Statistic Manual of Mental Disorders, 4th edition (DMS-IV) as hair loss from a patient`s repetitive self-pulling of hair. The disorder is included under anxiety disorders because it shares some obsessive-compulsive features. Patients have the tendency towards feelings of unattractiveness, body dissatisfaction, and low self-esteem (1,2). It is a major psychiatric problem, but many patients with this disorder first present to a dermatologist. An 11-year-old girl came to our department with a 2-month history of diffuse hair loss on the fron

The potential of oral healthcare providers to recognise early systemic disease.

Like many other body structures, the mouth is often affected by disease that principally arises from, or targets, several tissue sites. Indeed, systemic disorders can manifest on the oral mucosa as the first, only, or become the most severe manifestation of a systemic disease and/or become the most significant factor to adversely affect an individual's quality of life. Oral healthcare providers (dentists, therapists and hygienists) may be the first to observe an abnormality in the mouth which sometimes indicates a significant systemic disease unknown to the patient or their general medical pra

Premature hair graying: a multifaceted phenomenon.

Premature hair graying (PHG) is the early loss of natural hair color, influenced by genetic, biological, and environmental factors. This review discusses the significant psychological impacts of PHG and explores its underlying mechanisms, related health conditions, and available treatments. The review examines the roles of genetics, oxidative stress, and lifestyle factors such as smoking and diet in premature graying. It also considers associated medical conditions and current and emerging treatment options. This overview aims to improve understanding of PHG and its broader implications.

Allergic Reaction to Red Tattou Ink: Отчет о деле аниме-инспирированной татуировки в иммунокомпрометированном пациенте.

Татуировки стали формой художественного самовыражения на протяжении всей человеческой жизни. Они также используются в медицинской области в различных подспециализированных областях в диагностических и терапевтических целях. Рост этой деятельности сопровождался ростом резких и системных осложнений, связанных с различными пигментами и методами применения. Некоторые резкие осложнения, связанные с татуировкой, могут включать в себя подстрекательские, инфекционные и прожившие формы. Хорошо известно, что существуют относительные противопоказания для пациентов с системными или кожными заболеваниями,

Diabetes mellitus and the skin.

Several dermatoses are routinely associated with diabetes mellitus, especially in patients with chronic disease. This relationship can be easily proven in some skin disorders, but it is not so clear in others. Dermatoses such necrobiosis lipoidica, granuloma annulare, acanthosis nigricans and others are discussed in this text, with an emphasis on proven link with the diabetes or not, disease identification and treatment strategy used to control those dermatoses and diabetes.

Manifestations of systemic disease in the retina and fundus of cats and dogs.

The fundus is unique in that it is the only part of the body that allows for a noninvasive and uninterrupted view of vasculature and nervous tissue. Utilization of this can be a powerful tool in uncovering salient incidental findings which point to underlying systemic diseases, and for monitoring response to therapy. Retinal venules and arterioles allow the clinician to assess changes in vascular color, diameter, outline, and tortuosity. The retina and optic nerve may exhibit changes associated with increased or decreased thickness, inflammatory infiltrates, hemorrhages, and detachments. While

SFRP5 inhibits melanin synthesis of melanocytes in vitiligo by suppressing the Wnt/β-catenin signaling.

Secreted frizzled-related protein 5 (SFRP5) plays a pivotal role in regulating the development of many tissues and organs, however, as an inhibitor of Wnt signaling, the role of SFRP5 in vitiligo remains unknown. Hence, we speculated that SFRP5 might be associated with melanogenesis in melanocytes by regulating Wnt signaling in vitiligo. In this study, we found that SFRP5 was overexpressed in the skin lesions of patients with vitiligo. Compared with that in normal epidermal melanocytes (PIG1), the expression of SFRP5 was increased in vitiligo melanocytes (PIG3V). To investigate the effect of S

Integumentary System

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PPAR-γ in Melanoma and Immune Cells: Insights into Disease Pathogenesis and Therapeutic Implications.

Changes in skin pigmentation, like hyperpigmentation or moles, can affect appearance and social life. Unlike locally containable moles, malignant melanomas are aggressive and can spread rapidly, disproportionately affecting younger individuals with a high potential for metastasis. Research has shown that the peroxisome proliferator-activated receptor gamma (PPAR-γ) and its ligands exhibit protective effects against melanoma. As a transcription factor, PPAR-γ is crucial in functions like fatty acid storage and glucose metabolism. Activation of PPAR-γ promotes lipid uptake and enhances sensitivi

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… Future studies targeting these receptors may provide new insights into their roles in pigmentation disorders and cancer therapy. 3.3. … Prevention and Treatment of Skin Pigmentation Disorders J. Clin. Med. 2024 13 4312 10.3390/jcm13154312 39124579 PMC11313539 4. Mosca S. Morrone A. Human Skin Pigmentation: From a Biological Feature to a Social Determinant Healthcare 2023 11 2091 10.3390/healthcare11142091 37510532 PMC10379278 5. …

Skin Hypopigmentation in Hematology Disorders.

Hypopigmentation disorders pose significant diagnostic challenges in dermatology, sometimes reflecting underlying hematological conditions. This review explores the clinical presentations related to hypopigmentation in hematological disorders, focusing on vitiligo, morphea, and syndromic albinism. Vitiligo, an autoimmune disorder targeting melanocytes, involves interactions between genetic polymorphisms and immune responses, particularly regarding CD8+ T cells and IFN-γ. Drug-induced vitiligo, notably by immune checkpoint inhibitors and small-molecule targeted anticancer therapies, underscores…

Dermatological Manifestations of Amyloid Light-Chain (AL) Amyloidosis: A Case Report Highlighting Early Diagnosis and Treatment.

This case report describes a 52-year-old man who presented with gradually progressive dark cutaneous discoloration over the upper trunk and periorbital region, accompanied by painless enlargement of the tongue, which initially interfered with speech and eating. Over the subsequent months, he experienced marked unintentional weight loss, persistent fatigue, and symptoms consistent with autonomic involvement, including postural dizziness and altered bowel habits. Clinical examination revealed waxy skin changes and macroglossia. Laboratory evaluation demonstrated a monoclonal light-chain abnormal

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… Dermoscopy can reveal characteristic findings, such as shiny white or yellowish dots and streaks in the papillary dermis, helping to distinguish amyloid deposits from other causes of pigmentation disorders [ 9 ]. Histopathological examination remains the gold standard for diagnosing amyloidosis. …

Skin manifestations associated with systemic diseases - Part II.

The skin, by reflecting internal processes, externalizes what happens inside the body in many diseases. Thus, the skin, as an organ, extrapolates its functions of protection, barrier and signals the existence of systemic diseases, expanding the importance of the dermatologist beyond the skin surface. Thus, the dermatologist investigates diagnostic hypotheses for conditions related to all systems and refers patients to the appropriate specialty. Combined with examination by a trained eye, the skin, due to its easy access, is still the ideal place for performing biopsies, which often clarify the