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hair cell leukemia

Anuradha Tarafdar, Lisa E M Hopcroft, Paolo Gallipoli, Francesca Pellicano, Jennifer Cassels, Alan Hair, Koorosh Korfi, Heather G Jørgensen, David Vetrie, Tessa L Holyoake, Alison M Michie
Targeting the fusion oncoprotein BCR-ABL with tyrosine kinase inhibitors has significantly impacted on chronic myeloid leukemia (CML) treatment, transforming the life expectancy of patients; however the risk of relapse remains, due to persistence of leukemic stem cells (LSCs). Therefore it is imperative to explore the mechanisms that result in LSC survival and develop new therapeutic approaches. We now show that MHC-II and its master regulator class II transactivator (CIITA) are downregulated in CML compared to non-CML stem/progenitor cells in a BCR-ABL kinase independent manner...
October 28, 2016: Blood
Carole Bitar, Mohammed Z H Farooqui, Janet Valdez, Nakhle S Saba, Susan Soto, Amanda Bray, Gerald Marti, Adrian Wiestner, Edward W Cowen
IMPORTANCE: Ibrutinib, a Bruton tyrosine kinase inhibitor, is a new targeted agent approved by the US Food and Drug Administration for the treatment of chronic lymphocytic leukemia (CLL), mantle cell lymphoma, and Waldenström macroglobulinemia. Ibrutinib is overall well tolerated but long-term treatment is required until disease progression or intolerable toxic effects occur. Little is known regarding its cutaneous adverse effects. OBJECTIVE: To describe the hair and nail manifestations associated with the long-term use of ibrutinib for the treatment of CLL...
June 1, 2016: JAMA Dermatology
P Roccabianca, G Avallone, A Rodriguez, L Crippa, E Lepri, C Giudice, M Caniatti, P F Moore, V K Affolter
Feline primary cutaneous lymphomas (FPCLs) account for 0.2% to 3% of all lymphomas in cats and are more frequently dermal nonepitheliotropic small T-cell tumors. Emergence of FPCL seems unrelated to feline leukemia virus (FeLV) serological positivity or to skin inflammation. A total of 17 cutaneous lymphomas with a history of vaccine injection at the site of tumor development were selected from 47 FPCLs. Clinical presentation, histology, immunophenotype, FeLV p27 and gp70 expression, and clonality were assessed...
July 2016: Veterinary Pathology
Robert J Kreitman
In this issue of Blood, Pettirossi et al, including Drs Tiacci and Falini, who led the effort in 2011 defining the BRAF-V600E driving mutation in hairy cell leukemia (HCL),provide extensive laboratory studies showing that inhibitors of BRAF-V600E and/or mitogen-activated protein kinase kinase (MEK) reach their targets and cause HCL cell death
February 19, 2015: Blood
Ji Hye Kim, Sang Gyu Park, Wang-Kyun Kim, Sun U Song, Jong-Hyuk Sung
Platelet-derived growth factor-D (PDGF-D) was recently identified, and acts as potent mitogen for mesenchymal cells. PDGF-D also induces cellular transformation and promotes tumor growth. However, the functional role of PDGF-D in adipose-derived stem cells (ASCs) has not been identified. Therefore, we primarily investigated the autocrine and paracrine roles of PDGF-D in this study. Furthermore, we identified the signaling pathways and the molecular mechanisms involved in PDGF-D-induced stimulation of ASCs. It is of interest that PDGF-B is not expressed, but PDGF-D and PDGF receptor-β are expressed in ASCs...
February 2015: Stem Cells
Zheng Z Topp, Alan Saven
Hairy cell leukemia (HCL) is an uncommon low grade B cell leukemia that is marked by pancytopenia, splenomegaly, and characteristic cytoplasmic hairy projections. The current standard of care is treatment with purine analogs, like cladribine or pentostatin, which provide a high complete remission rate with a median duration of response of 5 years. Many patients who show initial remission will relapse, and others with refractory disease may show no response. The discovery of the BRAF mutation has created a therapeutic target exploited by oral inhibitors like vemurafenib and dabrafenib...
October 2014: Expert Review of Hematology
Kensuke Kojima, Toshihiko Ando, Shinya Kimura
Recent advances in the treatment of lymphoid leukemias have incorporated molecular targeted drugs (CD20-targeting rituximab and BCR-ABL tyrosine kinase inhibitors) into the traditional chemotherapeutic agents. This article reviews novel molecular targeted therapies for patients with lymphoid leukemias including acute lymphoblastic leukemia, chronic lymphocytic leukemia, hairly cell leukemia and HTLV-I-related adult T-cell leukemia. Investigational agents that will be discussed in this review include inotuzumab, blinatumomab, alemtuzumab, ofatumumab, ibrutinib, idelalisib, bafetinib, lenalidomide, ABT-199 and mogamulizumab...
June 2014: Nihon Rinsho. Japanese Journal of Clinical Medicine
Kazuhiro Okumura, Megumi Saito, Eriko Isogai, Yoshimasa Aoto, Tsuyoshi Hachiya, Yasubumi Sakakibara, Yoshinori Katsuragi, Satoshi Hirose, Ryo Kominami, Ryo Goitsuka, Takuro Nakamura, Yuichi Wakabayashi
Previous studies have shown that Meis1 plays an important role in blood development and vascular homeostasis, and can induce blood cancers, such as leukemia. However, its role in epithelia remains largely unknown. Here, we uncover two roles for Meis1 in the epidermis: as a critical regulator of epidermal homeostasis in normal tissues and as a proto-oncogenic factor in neoplastic tissues. In normal epidermis, we show that Meis1 is predominantly expressed in the bulge region of the hair follicles where multipotent adult stem cells reside, and that the number of these stem cells is reduced when Meis1 is deleted in the epidermal tissue of mice...
2014: PloS One
A Peretti, C Borgogna, D Rossi, L De Paoli, M Bawadekar, E Zavattaro, R Boldorini, M De Andrea, G Gaidano, M Gariglio
BACKGROUND: Research demonstrates an increased incidence of skin cancer in immunocompromised hosts, including patients with chronic lymphocytic leukaemia (CLL) and organ transplant recipients (OTRs). Active human β-papillomavirus (β-HPV) infection has been found in OTR skin lesions, suggesting its possible involvement in skin carcinogenesis. Merkel cell polyomavirus (MCPyV) has also been reported in cases of skin cancer. OBJECTIVES: To investigate the potential correlations between patient clinical features and skin cancer development, and the presence of β-HPV and MCPyV DNA and protein markers in skin lesions and hair bulbs from patients with CLL...
December 2014: British Journal of Dermatology
Anna M Czarnecka, Sylwia Oborska, Piotr Rzepecki, Cezary Szczylik
Tyrosine kinase inhibitors are novel therapies targeting specific cellular signalling pathways. Sunitinib and sorafenib primarily block tyrosine kinase receptors involved in the progression of many tumours, including clear cell renal cell cancer (ccRCC). Although developed to target selected receptors, it is becoming apparent that they inhibit other kinases; this may result in the development of unexpected side effects. This is potentially dangerous as kinases on noncancerous cells are also inhibited. TKI off-target effects contributing to cardiotoxicity, hypothyroidism, hypertension, fatigue, hair depigmentation, hand-foot syndrome and gastrointestinal perforation have been described...
2015: Future Oncology
Isabel Arias-Martínez, Marco Venancio-Hernández
Hypereosinophilic syndrome is characterized by peripheral eosinophilia over 1,500 cell/mm3 and/or tissue eosinophilia, with dysfunction or damage to organ, once other causes were ruled out. This paper presents a case of hypereosinophilic syndrome (HS) which presented as lymphoblastic leukemia in a teenager. This is a 13 year old female, with B cell lymphoblastic leukemia at 9 years old, who received chemotherapy for 2 years achieving remission. One year after remission she presented malar rash, hair loss, arthralgias, conjuntival redness, dyspnea and thoracic oppression...
October 2013: Revista Alergia Mexico: Organo Oficial de la Sociedad Mexicana de Alergia e Inmunología, A.C
Catuxa Celeiro-Muñoz, Daniel González-Vilas, Dolores Sánchez-Aguilar, José Manuel Suárez-Peñaranda
Viral-associated trichodysplasia spinulosa is an unusual condition with distinctive clinical and histopathological features. Initially described in patients immunosupressed as a result of solid organ transplantation, it has also been reported in patients treated with immunosuppressive drugs other than cyclosporine or being treated for hematological malignancies. Patients presented with disseminated follicular, hyperkeratotic papules, and variable degrees of alopecia. Histopathological examination revealed shaftless bulbous and dilated hair follicles with keratotic plugging of the infundibulum...
June 2014: American Journal of Dermatopathology
Yang Hu, Yan Chen, Li-Hua Wang, Xue Chen, Fang Fang, Shi-Qin Liu, Xue-Qiang Wu, Ping Zhu
The splenic marginal zone lymphoma (SMZL) is a relatively rare chronic B lymphoproliferative disease, which primarily manifest increase of peripheral blood lymphocyte count and/or scale, and splenomegaly, while the peripheral superficial lymph nodes are often not swollen. Therefore, the splenectomy are usually needed to confirm the diagnosis, but the majority of patients could not accept such management, resulting in early difficult diagnosis. This study was purposed to explore the more prior way for diagnosis based flow cytometry (FCM)...
April 2014: Zhongguo Shi Yan Xue Ye Xue za Zhi
S Ingen-Housz-Oro, N Franck, N Beneton, A Fauconneau, G Do-Pham, A Carlotti, T Petit, I Liolios, C Bara, H Carpentier, D Storelli, B Prophette, L Garderet, C Haioun, E Petit, M-H Delfau-Larue, B Vergier, O Chosidow, M Beylot-Barry, N Ortonne
BACKGROUND: Mycosis fungoides (MF) and pseudo-MF (or MF simulant) can be associated with B-cell malignancies, but distinction between a true neoplasm and a reactive process may be difficult. OBJECTIVES: To report seven patients with B-cell malignancy and folliculotropic MF or pseudo-MF and emphasize on criteria allowing distinction between the two conditions. METHODS: We retrospectively and prospectively included seven patients with B-cell malignancy who presented skin lesions histologically consisting in a folliculotropic T-cell infiltrate and reviewed the literature on the topic...
January 2015: Journal of the European Academy of Dermatology and Venereology: JEADV
Mitsuaki Ishida, Muneo Iwai, Keiko Yoshida, Akiko Kagotani, Hidetoshi Okabe
Follicular mucinosis is recognized as one of the histopathological reaction patterns characterized by the accumulation of mucin within follicular epithelium. It is induced by various causes including inflammatory diseases, and more than half of the cases are associated with malignant lymphoma, mainly mycosis fungoides. Herein, we describe the third documented case of adult T-cell leukemia/lymphoma (ATLL) accompanying follicular mucinosis. A 72-year-old Japanese male presented with persistent erythema in his arm and neck...
2013: International Journal of Clinical and Experimental Pathology
Jonathan Cotliar, Olga Frankfurt
IMPORTANCE: Acute graft-vs-host disease (GVHD) typically requires high-dose systemic steroids as first-line treatment. Like drug eruptions, viral exanthema, and toxic erythema of chemotherapy, Demodex folliculitis is a clinical mimicker of acute GVHD and requires nonimmunosuppressive therapy. This case of Demodex folliculitis mimicking acute GVHD highlights the need for skin biopsy in patients who have undergone a stem cell transplant with eruptions on the head and neck. OBSERVATIONS: A 46-year-old white woman with a history of Fms-like tyrosine kinase 3 acute myeloid leukemia presented to the dermatology clinic with a 5-day history of a nonpruritic eruption on her face and neck 28 days after undergoing a double umbilical cord blood hematopoietic stem cell transplant (HSCT)...
December 2013: JAMA Dermatology
Anshul Awasthi, Adele G Woolley, Fabienne J Lecomte, Noelyn Hung, Bruce C Baguley, Sigurd M Wilbanks, Aaron R Jeffs, Joel D A Tyndall
GLI pathogenesis-related 1 (GLIPR1) was previously identified as an epigenetically regulated tumor suppressor in prostate cancer and, conversely, an oncoprotein in glioma. More recently, GLIPR1 was shown to be differentially expressed in other cancers including ovarian, acute myeloid leukemia, and Wilms' tumor. Here we investigated GLIPR1 expression in metastatic melanoma cell lines and tissue. GLIPR1 was variably expressed in metastatic melanoma cells, and transcript levels correlated with degree of GLIPR1 promoter methylation in vitro...
2013: Frontiers in Oncology
Arnaldo C Couto, Jeniffer D Ferreira, Ana C S Rosa, Maria S Pombo-de-Oliveira, Sérgio Koifman
OBJECTIVE: To investigate the association between maternal exposure to hair dyes and hair straightening cosmetics (HDSC) during pregnancy and leukemia at an early age (<2yr., EAL). METHODS: A multicenter hospital-based case-control study was carried out in 13 states in Brazil between 1999 and 2007. Mothers of 176 ALL (acute lymphocytic leukemia) and 55 AML (acute myeloid leukemia) cases and 419 controls were enrolled and interviewed. Data on maternal exposure to HDSC occurring 3months before pregnancy, during pregnancy and during breastfeeding were obtained...
September 5, 2013: Chemico-biological Interactions
Taisuke Ito, Shinichiro Shimada, Tatsuyoshi Mori, Yoshiki Tokura
A 38-year-old female patient suffered from alopecia areata totalis followed by human T-cell lymphotropic virus-1-associated myelopathy (HAM). These two diseases have recently been considered to be related to cell-mediated autoimmune reactions. Immunohistochemistry revealed accumulation of CXCR3+ CD8+ T cells around hair bulbs in alopecic lesions. Furthermore, flow cytometric analysis showed the elevated frequency of CD8+ human leukocyte antigen DR+ -activated T cells at the initial time and declined at the hair regrowth phase with HAM...
May 2013: Journal of Dermatology
Ying Xiao, Wei-Meng Woo, Keisuke Nagao, Wenling Li, Atsushi Terunuma, Yoh-suke Mukouyama, Anthony E Oro, Jonathan C Vogel, Isaac Brownell
The perivascular microenvironment helps in maintaining stem cells in many tissues. We sought to determine whether there is a perivascular niche for hair follicle stem cells. The association of vessels and follicle progenitor cells began by embryonic day 14.5, when nascent hair placodes had blood vessels approaching them. By birth, a vascular annulus stereotypically surrounded the keratin 15 negative (K15-) stem cells in the upper bulge and remained associated with the K15- upper bulge throughout the hair cycle...
October 2013: Journal of Investigative Dermatology
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