Dermatology Commons^™

R992c (P.R1192c) Substitution In Collagen Ii Alters The Structure Of Mutant Molecules And Induces The Unfolded Protein Response., Hye Jin Chung, Deborah A. Jensen, Katarzyna Gawron, Andrzej Steplewski, Andrzej Fertala

Department of Dermatology and Cutaneous Biology Faculty Papers

We investigated the molecular bases of spondyloepiphyseal dysplasia (SED) associated with the R992C (p.R1192C) substitution in collagen II. At the protein level, we analyzed the structure and integrity of mutant molecules, and at the cellular level, we specifically studied the effects of the presence of the R992C collagen II on the biological processes taking place in host cells. Our studies demonstrated that mutant collagen II molecules were characterized by altered electrophoretic mobility, relatively low thermostability, the presence of atypical disulfide bonds, and slow rates of secretion into the extracellular space. Analyses of cellular responses to the presence of the mutant …

Freedom For The Bulgarian Nurses And A Palestinian Doctor., Lawrence Parish

Department of Dermatology and Cutaneous Biology Faculty Papers

On July 24, 2007, the five Bulgarian nurses and the Palestinian, unjustly accused of infecting Libyan children with the AIDS virus, were freed by the Libyan government. They had spent a tumultuous seven years in prison, much of the time on death row, having been accused of injecting the children with tainted blood they had brought with them. This was not only preposterous but also an impossibility as the particular strain of the AIDS virus had been found in Libya, two years prior. [1]

Mice Deficient In Involucrin, Envoplakin, And Periplakin Have A Defective Epidermal Barrier., Lisa M Sevilla, Rachida Nachat, Karen R Groot, John F Klement, Jouni Uitto, Philippe Djian, Arto Määttä, Fiona M Watt

Department of Dermatology and Cutaneous Biology Faculty Papers

The cornified envelope is assembled from transglutaminase cross-linked proteins and lipids in the outermost epidermal layers and is essential for skin barrier function. Involucrin, envoplakin, and periplakin form the protein scaffold on which the envelope assembles. To examine their combined function, we generated mice deficient in all three genes. The triple knockouts have delayed embryonic barrier formation and postnatal hyperkeratosis (abnormal accumulation of cornified cells) resulting from impaired desquamation. Cornified envelopes form but are ultrastructurally abnormal, with reduced lipid content and decreased mechanical integrity. Expression of proteases is reduced and the protease inhibitor, serpina1b, is highly upregulated, resulting in defective …

Dermatology 75 Years Ago., Lawrence Parish, Joseph A Witkowski

Department of Dermatology and Cutaneous Biology Faculty Papers

It seems that the practicing dermatologist in 2007 is being attacked on all fronts. The Food and Drug Administration has mandated a cumbersome program for monitoring isotrentinoin usage, its analogue barely comes under scrutiny. iPledge is just a plain nightmare. The acumen of the board certified dermatologist is being challenged by Maintenance of Certification proposals because other specialties are doing it; yet, the neighborhood pharmacist is unhampered in dispensing all sorts of advice about treatment. The insurance clerk thrives on denying medication, prescribed by the physician, using flawed reasoning or else suggesting that a ten days’ supply of medicine should …

Factors Associated With Atypical Moles In New Hampshire, Usa, L Titus-Ernstoff, J Ding, A. E. Perry, S. K. Spencer, B. F. Cole, M. S. Ernstoff

Dartmouth Scholarship

Only a few studies, conducted in Sweden, assessed factors associated with the presence of atypical moles in the general population. We conducted a population-based, case-control study in New Hampshire, USA, to identify factors associated with atypical moles. In our study, atypical moles affected 14% of the study population. The adjusted odds ratio (OR) was 0.34 (95% confidence interval (CI)=0.14-0.80) for those with the highest adulthood recreational sun exposure, relative to the lowest. The OR for any freckles, compared to none, was 2.24 (95% CI=1.18-4.25). We found a linear relationship between the number of benign moles and the presence of atypical …

Dermatology Is A Specialty; Dermatology Is Not A Subspecialty., Lawrence Parish, Larry E Millikan

Department of Dermatology and Cutaneous Biology Faculty Papers

Specialization began in American medicine about the time of the War Between the States. Several factors spurred the direction of practitioners away from being the so-called “complete physicians. Most important were the advances in instrumentation made by the 1860’s, which allowed ophthalmology and otolaryngology to develop into distinct divisions of allopathic medicine; sometimes, they even joined together, viz eye, ear, nose, and throat specialist. Dermatology, too, became one of the early specialties for a myriad of reasons ranging from the obvious – visual inspection - to the mundane, viz. default – syphilis was too ugly and complicated for every physician …

Bibliography Of Secondary Sources On The History Of Dermatology Iii. Books, Monographs, And Chapters In English Supplemented Through 2005., Lawrence Charles Parish, John Thorne Crissey, Jennifer L Parish, Daniel H Parish

Department of Dermatology and Cutaneous Biology Faculty Papers

Providing supplements to the history of dermatology bibliographic record has been a continuous project for the past four decades. When the endeavor was initiated, the original authors decided that only contributions in English and those directly related to dermatology, excluding sexually transmitted diseases as such, would be indexed.

There is the perennial question of whether such a manually created bibiliographic project has a need. The obvious answer remains yes. While Index Medicus has expanded the number of journals that are indexed, the number of dermatology publications currently included by Index Medicus is just over fifty. Granted, most of the papers …

Angiokeratoma Of Tongue:A Series Of 14 Cases, Nausheen Yaqoob, Aamir Ahsan, Zubair Ahmed, Akhter Husain, Rashid Ahmed, Naila Kayani, Shahid Pervez, Sheema Hassan

Department of Pathology and Laboratory Medicine

Angiokeratomas (AC) are vascular lesions which are defined histologically as one or more dilated blood vessels lying directly subepidermal and showing an epidermal proliferative reaction with ectatic capillaries in the papillary dermis. Only three other cases of isolated mucosal angiokeratoma have been reported in the indexed literature. We reviewed all cases of angiokeratoma located on the tongue, diagnosed in our department during a study period of 10 years (1995-2005). Histologically all 14 cases showed dilated and congested blood vessels in the upper papillary dermis. They lack deep dermal involvement. Hyperkeratosis and acanthosis were also seen in most of the cases. …

Barnacles, Old Age Marks, Or Just Plain Seborrheic Keratoses., Lawrence Charles Parish, Joseph A. Witkowski

Department of Dermatology and Cutaneous Biology Faculty Papers

Growing older may mean more wrinkles and creaking joints, but why does it also entail an accumulation of barnacles. These brown, somewhat friable, often warty lesions are more common on senior citizens but are not necessarily limited to the chronologically challenged. Seborrheic keratoses (SKs) can be easily recognized (fig 1), but the itching and the occasional scratch-induced dermatitis make them more than a cosmetic nuisance. (fig 2)

SKs can go by a variety of names, ranging from basal cell papillomas, senile warts, and senile keratoses to seborrheic verrucae and verrucous senilis. The various terms provide no more information on their …

Dermatophyte Growth And Degradation Of Human Stratum Corneum In Vitro (Pathogenesis Of Dermatophytosis)., Azam J. Samdani

Department of Medicine

Background: This study was carried out to determine growth of dermatophytes using human stratum corneum in vitro and the degrading effect of Keratinases (Proteinases) on stratum corneum for a complete understanding of the host parasite relationship.

Method: Trichophyton rubrum isolates derived from patients with tinea cruris infections were obtained from the Department of Medical Microbiology, University Hospital of Wales, U.K. Human stratum corneum sterilized with ethylene oxide was used as a nitrogen source in agar culture medium plates.

Result: Fungal growth took place in plates which contained human stratum corneum particles while there was no growth in the plates without …

Menke's Kinky Hair Syndrome--A Rare Medical Condition., Yaseer Al-Bita, Azam J. Samdani, Tania Azam

Department of Medicine

The case of a 16-month-old boy is described who had typical clinical and radiological features and was proven biochemically to be a case of Menke's disease. Clinical manifestations began in the first few months with hypothermia, hypotonia, seizures and death occurring at the age of 18 months.

Cutaneous Manifestations Of Hyper-Ige Syndrome In Twins: A Case Report From Saudi Arabia., Azam J. Samdani, A. Tania

Department of Medicine

The hyper-IgE syndrome with recurrent infections is a rare immunodeficiency disorder characterized by very high levels of IgE in serum. It is inherited in most of the cases in a dominant fashion meaning that it can run in families with a high frequency. About 250 cases have been published in literature so far.

Pregnancy Dermatoses: A Three-Year Study, Azam J. Samdani

Department of Medicine

Objective: To determine the percentage occurrence, clinical features and the age distribution of pregnancy-related dermatoses in pregnant females who were referred from Maternity Hospital Makkah to dermatology department for management at King Abdul Aziz Hospital, Makkah, Saudi-Arabia.

Methods: Patients who attended the dermatology clinic at King Abdul Aziz Hospital, Makkah were examined clinically and appropriate laboratory evaluation was done to facilitate diagnosis. These cases were managed till the termination of pregnancy and 10 weeks follow up in the puerperium. This study lasted for a period of 03 calendar years.

Results: A total of 47 females were seen, with polymorphic …

The Effect Of Proteinases (Keratinases) In The Pathogenesis Of Dermatophyte Infection Using Scanning Electron Microscope, Azam J. Samdani, Yaseer Al-Bitar

Department of Medicine

Objective: To study the inter-relationship between the stratum corneum of host and the fungal microorganisms using scanning electron microscopy for a complete understanding of the host parasite relationship.

Setting: The patients attended the outpatients of Department of Dermatology, King Abdul Aziz Hospital Makkah. The isolation & identification was carried out at the Department of Mycology University Hospital of Wales, Cardiff, U.K.

Material and Methods: Skin surface biopsies were obtained from two patients suffering from tinea cruris infection. One patient was infected with Trichophyton rubrum and the other with Epidermophyton floccosum strains.

Results: The scanning electron microphotographs obtained from two patients …

Transfection Of Il-10 Expression Vectors Into Endothelial Cultures Attenuates Alpha4beta7-Dependent Lymphocyte Adhesion Mediated By Madcam-1., Makoto Sasaki, Paul Jordan, Jeff Houghton, Xianmin Meng, Makoto Itoh, Takashi Joh, J Steven Alexander

Department of Dermatology and Cutaneous Biology Faculty Papers

BACKGROUND: Enhanced expression of MAdCAM-1 (mucosal addressin cell adhesion molecule-1) is associated with the onset and progression of inflammatory bowel disease. The clinical significance of elevated MAdCAM-1 expression is supported by studies showing that immunoneutralization of MAdCAM-1, or its ligands reduce inflammation and mucosal damage in models of colitis. Interleukin-10 (IL-10) is an endogenous anti-inflammatory and immunomodulatory cytokine that has been shown to prevent inflammation and injury in several animal studies, however clinical IL-10 treatment remains insufficient because of difficulties in the route of IL-10 administration and its biological half-life. Here, we examined the ability of introducing an IL-10 expression …

Current Treatments Of Vitiligo, Azam J. Samdani

Department of Medicine

No abstract provided.

Prevention Of Radiation-Induced Skin Reactions In Breast Cancer External Irradiation, Cathy Ammerman

Masters Theses & Specialist Projects

Radiation dermatitis is a common side effect of external beam radiation therapy. The purpose of this study was to evaluate the effectiveness of applying an aloe vera based skin gel to the target area skin in preventing the development of radiation dermatitis to postlumpectomy/ mastectomy patients receiving external beam radiation therapy in an ambulatory radiation-oncology clinic in the southeastern region of the United States. In this descriptive correlational study, a convenience sample of willing participants (n=18) was followed from initial treatment through the one-month follow-up examination to assess the intensity of their skin reaction. Five research questions were examined pertaining …

Ubinuclein, A Novel Nuclear Protein Interacting With Cellular And Viral Transcription Factors., S Aho, M Buisson, T Pajunen, Y W Ryoo, J F Giot, H Gruffat, A Sergeant, Jouni Uitto

Department of Dermatology and Cutaneous Biology Faculty Papers

The major target tissues for Epstein-Barr virus (EBV) infection are B lymphocytes and epithelial cells of the oropharyngeal zone. The product of the EBV BZLF1 early gene, EB1, a member of the basic leucine-zipper family of transcription factors, interacts with both viral and cellular promoters and transcription factors, modulating the reactivation of latent EBV infection. Here, we characterize a novel cellular protein interacting with the basic domains of EB1 and c-Jun, and competing of their binding to the AP1 consensus site. The transcript is present in a wide variety of human adult, fetal, and tumor tissues, and the protein is …

Elevated Expression Of Type Vii Collagen In The Skin Of Patients With Systemic Sclerosis. Regulation By Transforming Growth Factor-Beta., Lidia Rudnicka, John Varga, Angela M. Christiano, Renato V. Iozzo, Sergio A. Jimenez, Jouni Uitto

Department of Dermatology and Cutaneous Biology Faculty Papers

A hallmark of systemic sclerosis (SSc) is the development of tissue fibrosis. Excessive production of several connective tissue components normally present in the dermis, including type I, III, V, and VI collagens as well as fibronectin and proteoglycans, is a consistent finding in the skin of SSc patients. Type VII collagen is a major constituent of anchoring fibrils, present in the skin at the dermal-epidermal basement membrane zone. TGF-beta has been shown to upregulate the expression of the type VII collagen gene. In this study, we assessed the expression of type VII collagen and TGF-beta in the skin of patients …

Epidermal Mosaicism And Blaschko's Lines, Celia Moss, S. Larkins, Michael W. Stacey, A. Blight, P. A. Farndon, E. V. Davidson

Bioelectrics Publications

To test the hypothesis that epidermal rather than dermal mosaicism determines Blaschko's lines in hypomelanosis of Ito (HI), we studied the distribution of chromosomal mosaicism in four patients. In two, mosaicism had not been detected in lymphocytes or dermal fibroblasts, but was clearly shown in epidermal keratinocytes; furthermore, the abnormal cell line was confirmed to the hypopigmented epidermis and the normal epidermis contained only normal cells. Negative findings in the other two patients might be because of mosaicism which was undetected either because it was submicroscopic or because it was present in melanocytes, which have not yet been studied. These …

Biochemical And Histological Evaluation Of Normal Human Epidermis Vs Cultured Human Epidermis, Ngo Thi Bich Lien

Biological Sciences Theses & Dissertations

Cultured human keratinocytes were grown in vitro for transplantation purposes in case of severe burns. Single keratinocytes were harvested from human epidermis and grown in culture flasks such that multilayered sheets of keratinocyte cells were harvestable in approximately three weeks. In order to evaluate cultured epidermis for equivalency with normal human epidermis, biochemical and histological studies were performed. Thin sections of cultured epidermis were shown to be composed of cells that had undergone developmental differentiation, but not terminal differentiation. Biochemical analyses of keratin and prekeratin proteins isolated from cultured epidermis indicated that cultured keratinocytes have electrophoretic patterns similar to keratins/prekeratins …

The Zirconium Deodorant Granuloma: An Allergic Disorder, Harry J. Hurley Jr., Walter B. Shelley

Henry Ford Hospital Medical Journal

No abstract provided.