Πέμπτη, 14 Μαρτίου 2019

Dermatology

Assessment of melanogenesis in a pigmented human tissue-cultured skin equivalent
Nadja Nicole Zoller, Matthias Hofmann, Manuel Butting, Igor Hrgovic, Jürgen Bereiter-Hahn, August Bernd, Roland Kaufmann, Stefan Kippenberger, Eva Valesky

Indian Journal of Dermatology 2019 64(2):85-89

Background: Organotypic tissue-cultured skin equivalents are used for a broad range of applications either as possible substitute for animal tests or for transplantation in patient-centered care. Aims: In this study, we implemented melanocytes in a tissue-cultured full-thickness skin equivalent, consisting of epidermis and dermis. The versatility of this skin-like model with respect to pigmentation and morphological criteria was tested. Materials and Methods: Pigmented skin equivalents were morphologically characterized, and melanogenesis was evaluated after treatment with kojic acid – a tyrosinase inhibitor and forskolin – a well-known activator of the cyclic adenosine 3,5-monophosphate pathway. Pigmentation was measured either by determination of the extinction at 400 nm after melanin extraction with KOH correlated to a melanin standard curve or by reflectance colorimetric analysis, monitoring reflectance of 660 nm and 880 nm emitting diodes. Results: The morphological analysis revealed characteristic epidermal stratification with melanocytes located at the basal layer. Stimulation with forskolin increased the pigmentation, whereas treatment with kojic acid caused bleaching. Conclusion: The present study demonstrates that the herein-introduced organotypic tissue-cultured skin equivalent is comparable to the normal human skin and its versatility in tests regarding skin pigmentation. Therefore, this model might help understand diseases with dysfunctional pigmentation such as melasma, vitiligo, and postinflammatory hyperpigmentation. 


Biophysical measurements and ultrasonographic findings in chronic dermatitis in comparison with uninvolved skin
Taraneh Yazdanparast, Kamran Yazdani, Philippe Humbert, Alireza Khatami, Saman Ahmad Nasrollahi, Leila Izadi Firouzabadi, Alireza Firooz

Indian Journal of Dermatology 2019 64(2):90-96

Background: Nowadays noninvasive techniques are performed to evaluate the biophysical properties of skin in vivo. Aims: The aim of this study was to evaluate the biophysical and ultrasonographic properties of skin in chronic contact or atopic dermatitis to provide better insight into pathogenesis, diagnosis, and treatment response. Materials and Methods: The stratum corneum hydration, transepidermal water loss (TEWL), pH, erythema, melanin, sebum, friction, temperature, elasticity parameters (R0, R2, and R5), the thickness and echo-density of epidermis, dermis, and subepidermal low-echogenic band (SLEB) were measured on lesional, perilesional, and symmetrical skin of 22 chronic dermatitis patients. The average of perilesional and symmetrical skin values (control) was compared with lesional values. Results: Stratum corneum hydration (P<0.001), friction (P=0.02), sebum (P=0.01), and R0 (P<0.001) were significantly lower in lesion, TEWL (P=0.03), pH (P=0.001), erythema (P=0.004), and temperature (P=0.04) were significantly higher in lesion. The thickness of epidermis (P=0.002), dermis (P=0.034), and SLEB (P<0.001) were significantly higher in lesion; and the echo-density of dermis (P<0.001) and SLEB (P<0.001) was significantly lower in lesion. Conclusion: Chronic contact and atopic dermatitis are characterized by certain changes in biophysical and biomechanical properties of the skin. The evaluation of these parameters might be useful in the early diagnosis and assessment of treatment response. 


Systemic redox imbalance along with increased serum sialic acid is prevalent in patients with active vitiligo: A study from a tertiary care teaching hospital of Eastern India
Nilotpal Banerjee, Sanchaita Gayen, Dolanchampa Modak, Somenath Sarkar, Bibhuti Saha, Sumi Mukhopadhyay

Indian Journal of Dermatology 2019 64(2):97-100

Background: Vitiligo is one of the common depigmenting disorders causing disfigurement and affecting the quality of life. Redox imbalance is known to play a contributory role in melanocyte destruction. Serum sialic acid (SA) is an important marker of the acute-phase response and is associated with oxidative protein damage. Aim: The aim of this study was to analyze the status of oxidative stress markers and serum SA in vitiligo patients and to correlate the same with disease activity. Materials and Methods: The different oxidative stress parameters namely superoxide dismutase (SOD), malondialdehyde (MDA), and serum SA were measured spectrophotometrically using standard biochemical methodologies in all the study subjects. Results: Serum SOD and MDA values were higher in patients with active vitiligo (n = 23) as compared to stable vitiligo (n = 20) and healthy controls (n = 20). The MDA/SOD ratio was higher in patients with active vitiligo (P<0.0001). Serum SA was increased in active vitiligo as compared to stable vitiligo and healthy controls (P<0.0001). Conclusion: This study indicates that patients with active vitiligo demonstrate enhanced MDA/SOD ratio and increased serum SA. The studied parameters can serve as an important tool to monitor disease activity in vitiligo. 


A clinicopathological and immunofluorescence study of intraepidermal immunobullous diseases
Keya Basu, Moumita Chatterjee, Abhishek De, Moumita Sengupta, Chhanda Datta, Pradip Mitra

Indian Journal of Dermatology 2019 64(2):101-105

Context: Autoimmune blistering diseases (AIBDs) are characterized by autoantibodies directed against antigens of skin. Direct immunofluorescence (DIF) study helps in confirming the diagnosis where histopathology alone is noncontributory. Aims: This study aimed to evaluate the clinicopathological and DIF features of intraepidermal AIBD and to assess their relative diagnostic significance. Materials and Methods: It was an institution-based observational study. A total of 34 patients were studied over a period of 1½ years in the Department of Pathology in collaboration with the Department of Dermatology of a tertiary care hospital. The clinical, pathological, and DIF features were evaluated and documented. Statistical Analysis: Data were analyzed by statistical tests using GraphPad InStat. Results: Pemphigus vulgaris (PV) was the predominant type with 18 (53%) cases followed by 15 (44%) cases of pemphigus foliaceus (PF) and a single case of pemphigus erythematosus (PE). The age of the patients ranged from 17 to 85 years. Overall, there was a female preponderance in the study group. The most common presenting feature was pruritus (58.82%). Tzanck smear showed the presence of acantholytic cells in thirty (88.24%) patients. Characteristic histopathological features were present in all the cases of PV and PF except one case of PF which was found to be a case of PE. DIF study showed intraepidermal deposition of intercellular immunoglobulin G (IgG) and C3 both in PV and PF. The case of PE showed epidermal “antinuclear antibody” staining with IgG. Conclusion: Immunofluorescence study may be used as an additional tool for confirmation of diagnosis where histopathology alone is inconclusive. 


Clinico-epidemiological study of disability due to leprosy at the time of diagnosis among patients attending a tertiary care institution
Vengarakath Puthiyapura Reyila, Ambookken Betsy, Najeeba Riyaz, Sarita Sasidharanpillai, Pentam Veil Beegum Sherjeena, Maniparambath P Majitha, Deepa Mary Joseph

Indian Journal of Dermatology 2019 64(2):106-111

Background: With the declared elimination of leprosy as a public health problem, the World Health Organization has shifted the focus on the disabilities and deformities associated with leprosy. Aims: The aim was to study the Grade 1 and Grade 2 disability among newly diagnosed leprosy patients. Materials and Methods: All newly diagnosed leprosy patients attending the Outpatient Department of Government Medical College, Kozhikode, from January 1, 2013 to December 31, 2013 were included in the study and the Grade 1 and Grade 2 disabilities observed were analyzed. Results: During the 1-year period, 76 patients were diagnosed to have leprosy. Grade 1 and Grade 2 disabilities were noted in 31.6% and 17.1%, respectively. Major factors identified as risk for leprosy disability at the time of diagnosis were age >45 years, >5 skin lesions, ≥2 thickened peripheral nerve trunks, pure neuritic and borderline tuberculoid spectra of leprosy. Limitation: As the study was conducted in a tertiary care center, it does not perfectly indicate the status in the community. Conclusion: Disability noted in nearly 50% of leprosy cases at the time of diagnosis highlights the need to improve the effectivity of existing health-care system in early case detection and timely referral. In addition, it underscores the need to educate the affected regarding protective eye, foot, and hand care, so that progression to Grade 2 disability can be prevented. 


Awareness of family physicians towards antihistamines
Sumaya Zeerak, Kiran Godse, Sujit Kumar

Indian Journal of Dermatology 2019 64(2):112-114

Background: Antihistamines are one of the commonly prescribed groups of drugs for allergic disorders and pruritus. They are broadly grouped into two generations, the second-generation ones being more effective and with less side effects. The family physicians frequently use antihistamines as patients contact them initially for their problem. It will be interesting to know the mode of selection of antihistamines by them. Materials and Methods: The study was carried out on a sample of 100 family physicians. Primary data were collected from them after taking informed consent. A pre-validated questionnaire regarding knowledge, awareness, and prescribing schedule of antihistamines was filled up. The data were then analyzed with suitable statistical tests. Results: Almost 73% of physicians prescribed second-generation antihistamines, while 27% prescribed the first-generation ones. Only 15% of them were aware about the ARIA and GA2LEN guidelines and their recommendations for prescribing second-generation antihistamines over the older first-generation antihistamines, while 85% had not heard about them previously. A minimum 7% of practitioners revealed that they updosed the same drug four times in the treatment of urticaria, while 93% did not do it. Conclusion: Even though a sizeable percentage of family physicians prescribed second-generation antihistamines, most of them were not aware of their dosing guidelines. 


Effectiveness and safety of metformin versus Canthex™ in patients with acanthosis Nigricans: A randomized, double-blind controlled trial
Arindam Sett, Samiksha Pradhan, Karan Sancheti, Dibyendu Basu, Adrija Datta, Lekha Biswas, Sayan Das, Subhasis Kumar Pal, Nidhi Gupta, Amrita Sil, Nilay Kanti Das

Indian Journal of Dermatology 2019 64(2):115-121

Background: Acanthosis nigricans has been associated with conditions of insulin resistance such as obesity, polycystic ovary syndrome, and type 2 diabetes. Metformin and alpha-lipoic acid, two types of insulin-sensitizing agents, have been demonstrated to reduce insulin levels and improve insulin sensitivity. Alpha-lipoic acid is available as a fixed-dose combination with biotin, calcium pantothenate, and zinc sulfate as Canthex™. Aims: This study aimed to compare the effectiveness, safety, and improvement of the insulin resistance profile of Canthex™ and metformin in acanthosis nigricans. Materials and Methods: In this double-blind, randomized (1:1), active-controlled trial (CTRI/2017/02/007880), participants received either metformin 500 mg BD or Canthex™ BD for 12 weeks. Effectiveness parameters were improvement of severity of neck lesions and neck texture. Serum fasting insulin level, glucose, lipids, body weight, waist circumference, body mass index (BMI), and homeostatic model assessment-insulin resistance (HOMA-IR) were also assessed at baseline and at the end of the study. Adverse effects and changes in routine laboratory parameters were taken as safety parameters. Results: Thirty-three patients were analyzed by modified-intention-to-treat criteria. Severity of neck lesions and texture were comparable at baseline and it showed significant reduction (P<0.001) in both the treatment arms from the first follow-up onward. No intergroup variation was observed in any of the follow-ups. There was reduction in the values of fasting insulin, blood sugar, total cholesterol, and thyroid-stimulating hormone in both the groups. Weight, BMI, and waist circumference and BMI reduced significantly in both the groups. HOMA-IR decreased significantly in metformin group (P<0.001). Conclusion: Canthex™ is as effective and safe as metformin in the management of acanthosis nigricans and associated features of insulin resistance. 


Mucocutaneous adverse reactions of cancer chemotherapy and chemoradiation
Sheikh Naveed, Devinder Mohan Thappa, Biswajit Dubashi, Jagadeesan Pandjatcharam, Malathi Munisamy, Nidhi Singh

Indian Journal of Dermatology 2019 64(2):122-128

Background: With the introduction of newer anti-cancer agents, the adverse effects have become more rampant which call for concern in the treatment of patients with cancer. Hence, the assessment and management of dermatological adverse effects of anti-cancer therapy have become a significant part of the care of patients with cancer and require proper and close collaboration between the dermatologists and the oncologists. Aims: To assess the frequency and pattern of mucocutaneous adverse reactions to cancer chemotherapy and chemoradiation and grade them according to their severity and to identify hematological and biochemical changes related to cancer chemotherapy-induced mucocutaneous adverse reactions. Materials and Methods: This was a descriptive study done among 226 patients in an Indian tertiary care hospital, who presented with mucocutaneous adverse reactions to either chemotherapy alone or combination of chemotherapy and radiation to dermatology, medical oncology and radiotherapy outpatient departments. Detailed history and examination were undertaken. Visual analog score (VAS) was employed to quantify pain and pruritus. Correlation of various biochemical and hematological parameters with chemotherapy-induced adverse reactions was attempted and grading of adverse reactions was done based on the severity scale of Common Terminology Criteria for Adverse Events (CTCAE). Results: The common cutaneous adverse reactions observed in our study were nail changes (194 patients; 85.84%), followed by skin changes (191; 84.51%), hair changes (159, 70.35%), mucosal changes (34, 15.04%), and other miscellaneous manifestations. Grade 1 manifestations comprised of 49.91% of total manifestations followed by Grade 2 (45.45%) and Grade 3 (5.64%). In addition to bleomycin, other chemotherapeutic agents also had been shown to produce flagellate dermatitis in our study. Conclusion: Nail changes, skin changes, hair changes and mucosal changes occurred frequently as a significant side effect of chemotherapy, which a physician should be aware of, while selecting a chemotherapeutic drug. 


Combination of hydroquinone and fractional CO2 laser versus hydroquinone monotherapy in melasma treatment: A randomized, single-blinded, split-face clinical trial
Sanaz Nourmohammadi Abadchi, Farahnaz Fatemi Naeini, Elham Beheshtian

Indian Journal of Dermatology 2019 64(2):129-135

Background: Melasma is a chronic hyperpigmentation skin disorder mainly affecting women in the reproductive age. Available treatments for melasma do not lead to long-term satisfactory results. Aims: This study aimed to compare the efficacy of fractional CO2 laser in combination with topical therapy to topical therapy alone. Materials and Methods: Forty women with bilateral melasma were studied in this randomized single-blinded clinical trial. Each side of the face was randomly allotted to either topical hydroquinone 4% or combination of topical hydroquinone 4% and fractional CO2 laser. Patients received three sessions of laser therapy at 3-week intervals. Hydroquinone 4% application on both sides maintained for 3 months after the last laser session. The clinical improvement (darkness [D] and homogeneity [H] of hyperpigmentation) was measured by a blinded main investigator and an outcome assessor. Furthermore, improvement was assessed by physician's global assessment (PGA) and patient satisfaction (visual analog scale [VAS] score). Results: Significant reduction in D observed 3 weeks after combination therapy (P<0.001) and 6 weeks after monotherapy (P<0.001). Reduction in H became significant after 6 weeks in both groups (P<0.001). However, the two methods were not considerably different in any session (P>0.05). Furthermore, control and experiment sides were not significantly different considering VAS score and PGA (P>0.05). Conclusion: Considering the short-term outcome of laser and hydroquinone therapy, we can apply it to obtain earlier positive results. However, because of the lack of significant difference between the two methods and also the high cost of laser therapy, it seems better not to recommend fractional CO2 laser to patients as adjunctive therapy for long-term treatment of melasma. 


Summer-associated dermatitis: A cross-sectional study of a unique eczematous dermatosis in South India
Gurumoorthy Rajesh, Mohamed Rafeek, Kaliaperumal Karthikeyan

Indian Journal of Dermatology 2019 64(2):136-142

Background: In our hospital setup located in the tropical zone, during each summer, we frequently come across a unique eczematous dermatosis among elderly females that typically occur in summer. Aims and Objectives: We carried out this study with the objective of studying the demographic and clinical features of this dermatosis. Materials and Methods: In this hospital-based descriptive study, we enrolled twenty consecutive patients presenting with typical features of the dermatosis of interest, such as itchy eczematous scaly papule and plaques distributed predominantly over flexures, self-limiting in nature, and with summer exacerbation. Detailed history, clinical examination, and laboratory investigations were carried out. Results: All were females with a mean age of 52.35±15.74 years. Mean age at onset of the disease was 50.80±15.77 years. The onset and exacerbation of lesions typically occurred during summer. The mean duration of the disease was 17.75±15.80 months. The typical lesions were multiple well-defined erythematous scaly papules and plaques bilaterally symmetrically distributed predominantly over the flexures. All biopsies showed spongiotic dermatitis picture and direct immunofluorescence was negative in all of them. Conclusion: This unique dermatosis which occurs in elderly females has not been widely reported. With clinical features and results of various investigations, it would be appropriate to call it “summer-associated dermatitis.” 


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