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https://www.readbyqxmd.com/read/28805452/birt-hogg-dube-syndrome-with-a-novel-mutation-in-the-flcn-gene
#1
Gulsum Kayhan, Nilgun Yılmaz Demirci, Haluk Turktas, Mehmet Ali Ergun
BACKGROUND: Birt-Hogg-Dube syndrome (BHDS) is an autosomal dominant disease characterized by hair follicle hamartomas, kidney tumors, and spontaneous pneumothorax; its cause is a heterozygous mutation in the FLCN gene. Colorectal polyps and carcinoma have also been reported in BHDS. FLCN mutations can be detected in patients with isolated primary spontaneous pneumothorax (PSP), so PSP may present as part of BHDS. The aim of this report is to enhance awareness that patients presenting with spontaneous PSP should be evaluated for FLCN mutations...
August 14, 2017: Genetic Testing and Molecular Biomarkers
https://www.readbyqxmd.com/read/28695430/birt-hogg-dub%C3%A3-syndrome-a-review-of-dermatological-manifestations-and-other-symptoms
#2
REVIEW
Yun Tong, Jeremy A Schneider, Alvin B Coda, Tissa R Hata, Philip R Cohen
Birt-Hogg-Dubé syndrome (BHD) is an autosomal dominant genodermatosis with malignant potential characterized by cutaneous and extracutaneous stigmata. Aberrations in the folliculin (FLCN) gene, which is located on chromosome 17, have been discovered in individuals with this condition. Over 150 unique mutations have been identified in BHD. The skin lesions associated with this condition include fibrofolliculomas, trichodiscomas, perifollicular fibromas, and acrochordons. Extracutaneous features of the syndrome typically include the lung (spontaneous pneumothorax and cysts) and the kidney (neoplasms)...
July 10, 2017: American Journal of Clinical Dermatology
https://www.readbyqxmd.com/read/28656962/negative-regulation-of-egfr-signalling-by-the-human-folliculin-tumour-suppressor-protein
#3
Laura A Laviolette, Julien Mermoud, Isabel A Calvo, Nicholas Olson, Myriam Boukhali, Ortrud K Steinlein, Elisabeth Roider, Elke C Sattler, Dachuan Huang, Bin Tean Teh, Mo Motamedi, Wilhelm Haas, Othon Iliopoulos
Germline mutations in the Folliculin (FLCN) tumour suppressor gene result in fibrofolliculomas, lung cysts and renal cancers, but the precise mechanisms of tumour suppression by FLCN remain elusive. Here we identify Rab7A, a small GTPase important for endocytic trafficking, as a novel FLCN interacting protein and demonstrate that FLCN acts as a Rab7A GTPase-activating protein. FLCN(-/-) cells display slower trafficking of epidermal growth factor receptors (EGFR) from early to late endosomes and enhanced activation of EGFR signalling upon ligand stimulation...
June 28, 2017: Nature Communications
https://www.readbyqxmd.com/read/28623476/early-onset-renal-cell-carcinoma-in-an-adolescent-girl-with-germline-flcn-exon-5-deletion
#4
Meike Schneider, Katja Dinkelborg, Xiuli Xiao, Gayun Chan-Smutko, Kathleen Hruska, Dongli Huang, Pallavi Sagar, Mukesh Harisinghani, Othon Iliopoulos
Birt-Hogg-Dube (BHD) disease is an autosomal dominant cancer syndrome characterized by benign skin tumors, renal cancer and spontaneous pneumothorax and is caused by mutations in the Folliculin (FLCN) gene. Benign skin tumors and pneumothorax occur in the majority of patients affected by BHD syndrome, but only 30-45% of them develop renal cell carcinoma (RCC) with a median age of diagnosis at 48. The earliest onset of RCC in a BHD patient has been reported at age 20. Here we report a case of a 14 year-old patient with germline FLCN mutation leading to an early-onset bulky RCC that could not be classified strictly according to existing histological types...
June 16, 2017: Familial Cancer
https://www.readbyqxmd.com/read/28558743/clinical-and-genetic-characteristics-of-chinese-patients-with-birt-hogg-dub%C3%A3-syndrome
#5
Yaping Liu, Zhiyan Xu, Ruie Feng, Yongzhong Zhan, Jun Wang, Guozhen Li, Xue Li, Weihong Zhang, Xiaowen Hu, Xinlun Tian, Kai-Feng Xu, Xue Zhang
BACKGROUND: Birt-Hogg-Dubé syndrome (BHD) is an autosomal dominant disorder, the main manifestations of which are fibrofolliculomas, renal tumors, pulmonary cysts and recurrent pneumothorax. The known causative gene for BHD syndrome is the folliculin (FLCN) gene on chromosome 17p11.2. Studies of the FLCN mutation for BHD syndrome are less prevalent in Chinese populations than in Caucasian populations. Our study aims to investigate the genotype spectrum in a group of Chinese patients with BHD...
May 30, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28539984/birt-hogg-dub%C3%A3-syndrome-report-of-two-cases-with-two-new-mutations
#6
Margarida Rato, Ana Filipe Monteiro, Joana Parente, João Aranha, Ermelindo Tavares
INTRODUCTION: Birt-Hogg-Dubé syndrome (BHDS) is a rare autosomal dominant genodermatosis characterized by cutaneous fibrofolliculomas and/or trichodiscomas, lung cysts, spontaneous pneumothorax and renal tumors. However, its clinical expression is highly variable. This syndrome is caused by germline mutations in the folliculin gene (FLCN) on chromosome 17p11.2. MAIN OBSERVATIONS: Two men, 60 and 39-year-old, presented with a several year history of asymptomatic whitish papules scattered over the face and neck...
March 31, 2017: Journal of Dermatological Case Reports
https://www.readbyqxmd.com/read/28499369/characterization-of-a-splice-site-mutation-in-the-tumor-suppressor-gene-flcn-associated-with-renal-cancer
#7
Malte P Bartram, Tripti Mishra, Nadine Reintjes, Francesca Fabretti, Hakam Gharbi, Alexander C Adam, Heike Göbel, Mareike Franke, Bernhard Schermer, Stefan Haneder, Thomas Benzing, Bodo B Beck, Roman-Ulrich Müller
BACKGROUND: Renal cell carcinoma is among the most prevalent malignancies. It is generally sporadic. However, genetic studies of rare familial forms have led to the identification of mutations in causative genes such as VHL and FLCN. Mutations in the FLCN gene are the cause of Birt-Hogg-Dubé syndrome, a rare tumor syndrome which is characterized by the combination of renal cell carcinoma, pneumothorax and skin tumors. METHODS: Using Sanger sequencing we identify a heterozygous splice-site mutation in FLCN in lymphocyte DNA of a patient suffering from renal cell carcinoma...
May 12, 2017: BMC Medical Genetics
https://www.readbyqxmd.com/read/28363698/dihydromyricetin-prevents-obesity-induced-slow-twitch-fiber-reduction-partially-via-flcn-fnip1-ampk-pathway
#8
Qicheng Zhou, Yeyun Gu, Hedong Lang, Xiaolan Wang, Ka Chen, Xinhua Gong, Min Zhou, Li Ran, Jundong Zhu, Mantian Mi
Obesity is often accompanied by decreases in the proportion of skeletal muscle slow-twitch fibers and insulin sensitivity. Increased plasma non-esterified fatty acids (NEFA) levels are responsible for obesity-associated insulin resistance. Palmitate, one of the most elevated plasma NEFA in obesity, has been recognized as the principle inducer of insulin resistance. The present study showed that increased plasma NEFA levels were negatively linked to slow-twitch fiber proportion and insulin sensitivity, while slow-twitch fiber proportion was positively correlated to insulin sensitivity in high fat diet (HFD)-fed and ob/ob mice...
March 29, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28326182/birt-hogg-dub%C3%A3-syndrome-a-case-report-and-a-review-of-the-literature
#9
REVIEW
Dea Kejlberg Jensen, Anders Villumsen, Anne-Bine Skytte, Mia Gebauer Madsen, Mette Sommerlund, Elisabeth Bendstrup
Background: Birt-Hogg-Dubé syndrome (BHDS) is a rare autosomal dominant inherited syndrome caused by mutations in the folliculin coding gene (FLCN). The clinical manifestations of the syndrome involve the skin, lungs, and kidneys. Because of the rarity of the syndrome, guidelines for diagnosis and management of the patients with BHDS are lacking. Objective: To present a case story and a review of the literature on BHDS in order to give an update on genetics, clinical manifestations, diagnosis, treatment, prognosis and follow-up strategies...
2017: European Clinical Respiratory Journal
https://www.readbyqxmd.com/read/28222720/birt-hogg-dub%C3%A3-syndrome-a-literature-review-and-case-study-of-a-chinese-woman-presenting-a-novel-flcn-mutation
#10
Shengyu Hao, Fei Long, Fenglan Sun, Teng Liu, Daowei Li, Shujuan Jiang
BACKGROUND: The Birt-Hogg-Dubé (BHD) syndrome is a very rare autosomal dominant form of genodermatosis caused by germline mutations in the folliculin (FLCN) gene, which is mapped to the p11.2 region in chromosome 17. BHD commonly presents cutaneous fibrofolliculomas, pulmonary cysts, renal cell carcinoma, and recurrent pneumothoraxes. The disease is easily ignored or misdiagnosed as pneumothorax, pulmonary lymphangiomyomatosis (LAM), or emphysema. Follow-up and guidelines for managing recurrent pneumothoraxes in these patients are lacking...
February 21, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28151982/birt-hogg-dube-syndrome-prospectively-detected-by-review-of-chest-computed-tomography-scans
#11
Hye Jung Park, Chul Hwan Park, Sang Eun Lee, Geun Dong Lee, Min Kwang Byun, Sungsoo Lee, Kyung-A Lee, Tae Hoon Kim, Seong Han Kim, Seo Yeon Yang, Hyung Jung Kim, Chul Min Ahn
PURPOSE: Birt-Hogg-Dube syndrome (BHD) is a rare disorder caused by mutations in the gene that encodes folliculin (FLCN) and is inherited in an autosomal dominant manner. BHD is commonly accompanied by fibrofolliculomas, renal tumors, multiple pulmonary cysts, and spontaneous pneumothorax. The aim of this study was to detect BHD prospectively in patients undergoing chest computed tomography (CT) scans and to evaluate further the characteristics of BHD in Korea. METHODS: We prospectively checked and reviewed the chest CT scans obtained for 10,883 patients at Gangnam Severance Hospital, Seoul, Korea, from June 1, 2015 to May 31, 2016...
2017: PloS One
https://www.readbyqxmd.com/read/28069055/novel-germline-mutations-in-flcn-gene-identified-in-two-chinese-patients-with-birt-hogg-dub%C3%A3-syndrome
#12
Teng Li, Xianghui Ning, Qun He, Kan Gong
Birt-Hogg-Dubé (BHD) syndrome, a hereditary renal cancer syndrome caused by mutations in the folliculin (FLCN) gene, is characterized by the presence of fibrofolliculomas, pulmonary cysts, spontaneous pneumothorax, and renal cell carcinoma (RCC). Few BHD syndrome cases have been reported in Asian countries, and cutaneous presentations are relatively rare in Asian patients. Asian BHD patients may be misdiagnosed due to their atypical manifestations. Here, we report two Chinese BHD patients with novel FLCN mutations (c...
January 9, 2017: Chinese Journal of Cancer
https://www.readbyqxmd.com/read/28039480/nutrient-induced-fnip-degradation-by-scf%C3%AE-trcp-regulates-flcn-complex-localization-and-promotes-renal-cancer-progression
#13
Katsuyuki Nagashima, Hidefumi Fukushima, Kouhei Shimizu, Aya Yamada, Masumi Hidaka, Hisashi Hasumi, Tetsuro Ikebe, Satoshi Fukumoto, Koji Okabe, Hiroyuki Inuzuka
Folliculin-interacting protein 1 and 2 (FNIP1 and FNIP2) play critical roles in preventing renal malignancy through their association with the tumor suppressor FLCN. Mutations in FLCN are associated with Birt-Hogg-Dubé (BHD) syndrome, a rare disorder with increased risk of renal cancer. Recent studies indicated that FNIP1/FNIP2 double knockout mice display enlarged polycystic kidneys and renal carcinoma, which phenocopies FLCN knockout mice, suggesting that these two proteins function together to suppress renal cancer...
February 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28031834/birt-hogg-dub%C3%A3-syndrome-in-an-indonesian-patient-with-folliculin-gene-mutation
#14
Wiwien Heru Wiyono, Fariz Nurwidya, Hario Baskoro, Andika Chandra Putra
Birt-Hogg-Dubé (BHD) syndrome is a rare autosomal dominant disorder that affects the skin, kidney, and lungs. Affected individuals have an increased risk of developing multiple cysts in the lungs and a spontaneous pneumothorax. Germline mutations in the folliculin (FLCN) gene have been confirmed as the aetiology of BHD syndrome. A 51-year-old Indonesian female presented with recurrent spontaneous pneumothorax, multiple cysts in both lungs, and a renal cyst on magnetic resonance imaging (MRI). Blood sampling was performed to extract genomic DNA from peripheral blood leucocytes...
November 2016: Respirology Case Reports
https://www.readbyqxmd.com/read/28009417/multiple-chromophobe-and-clear-cell-renal-cancer-in-a-patient-affected-by-birt-hogg-dub%C3%A3-syndrome-a-case-report
#15
Roberto Castellucci, Michele Marchioni, Sergio Valenti, Giusepe Sortino, Giulio Borgonovo, Nicola Pesenti, Alberto C A Vismara, Maria C Circo, Barbara Sessa, Emanuele Micheli, Antonino Lembo
OBJECTIVES: Birt-Hogg-Dubé syndrome (BHDS) is a rare autosomal dominant characterized by the presence of fibrofolliculomas and/or trichodiscomas, pulmonary cysts, spontaneous pneumothorax, and renal tumors. The syndrome is linked to mutations in the FLCN gene, which is preferentially expressed in the skin, kidney, and lung. The aim of our paper is to describe a case of multiple bilateral renal cancer in a patient affected by BHDS. CASE PRESENTATION: Patient subjected to enucleoresection seven kidney tumors discovered right after ultrasound performed for other reasons...
December 16, 2016: Urologia
https://www.readbyqxmd.com/read/28007907/h255y-and-k508r-missense-mutations-in-tumour-suppressor-folliculin-flcn-promote-kidney-cell-proliferation
#16
Hisashi Hasumi, Yukiko Hasumi, Masaya Baba, Hafumi Nishi, Mitsuko Furuya, Cathy D Vocke, Martin Lang, Nobuko Irie, Chiharu Esumi, Maria J Merino, Takashi Kawahara, Yasuhiro Isono, Kazuhide Makiyama, Andrew C Warner, Diana C Haines, Ming-Hui Wei, Berton Zbar, Herbert Hagenau, Lionel Feigenbaum, Keiichi Kondo, Noboru Nakaigawa, Masahiro Yao, Adam R Metwalli, W Marston Linehan, Laura S Schmidt
Germline H255Y and K508R missense mutations in the folliculin (FLCN) gene have been identified in patients with bilateral multifocal (BMF) kidney tumours and clinical manifestations of Birt-Hogg-Dubé (BHD) syndrome, or with BMF kidney tumours as the only manifestation; however, their impact on FLCN function remains to be determined. In order to determine if FLCN H255Y and K508R missense mutations promote aberrant kidney cell proliferation leading to pathogenicity, we generated mouse models expressing these mutants using BAC recombineering technology and investigated their ability to rescue the multi-cystic phenotype of Flcn-deficient mouse kidneys...
January 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/27991910/establishment-and-characterization-of-bhd-f59rsvt-an-immortalized-cell-line-derived-from-a-renal-cell-carcinoma-in-a-patient-with-birt-hogg-dub%C3%A3-syndrome
#17
Mitsuko Furuya, Hisashi Hasumi, Masaya Baba, Reiko Tanaka, Yasuhiro Iribe, Takahiro Onishi, Yoji Nagashima, Yukio Nakatani, Yasuhiro Isono, Masahiro Yao
Hereditary renal cell carcinomas (RCCs) are life-threatening disorders not only for the patients but also for their relatives. Birt-Hogg-Dubé syndrome (BHD) is an autosomal dominant disorder caused by germline mutations in the folliculin gene (FLCN). The protein product, FLCN, functions as a tumor suppressor, and the affected patients have high risks of developing multiple RCCs. The carcinogenic mechanisms stemming from FLCN dysfunction have been investigated using rodent models and human RCC tissues. However, very limited information has been available about in vitro signaling of human renal cells with genetically mutant FLCN...
March 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/27913603/the-tumor-suppressor-flcn-mediates-an-alternate-mtor-pathway-to-regulate-browning-of-adipose-tissue
#18
Shogo Wada, Michael Neinast, Cholsoon Jang, Yasir H Ibrahim, Gina Lee, Apoorva Babu, Jian Li, Atsushi Hoshino, Glenn C Rowe, James Rhee, José A Martina, Rosa Puertollano, John Blenis, Michael Morley, Joseph A Baur, Patrick Seale, Zoltan Arany
Noncanonical mechanistic target of rapamycin (mTOR) pathways remain poorly understood. Mutations in the tumor suppressor folliculin (FLCN) cause Birt-Hogg-Dubé syndrome, a hamartomatous disease marked by mitochondria-rich kidney tumors. FLCN functionally interacts with mTOR and is expressed in most tissues, but its role in fat has not been explored. We show here that FLCN regulates adipose tissue browning via mTOR and the transcription factor TFE3. Adipose-specific deletion of FLCN relieves mTOR-dependent cytoplasmic retention of TFE3, leading to direct induction of the PGC-1 transcriptional coactivators, drivers of mitochondrial biogenesis and the browning program...
November 15, 2016: Genes & Development
https://www.readbyqxmd.com/read/27905298/haploinsufficiency-of-the-folliculin-gene-leads-to-impaired-functions-of-lung-fibroblasts-in-patients-with-birt-hogg-dub%C3%A3-syndrome
#19
Yoshito Hoshika, Fumiyuki Takahashi, Shinsaku Togo, Muneaki Hashimoto, Takeshi Nara, Toshiyuki Kobayashi, Fariz Nurwidya, Hideyuki Kataoka, Masatoshi Kurihara, Etsuko Kobayashi, Hiroki Ebana, Mika Kikkawa, Katsutoshi Ando, Koichi Nishino, Okio Hino, Kazuhisa Takahashi, Kuniaki Seyama
Birt-Hogg-Dubé syndrome (BHDS) is an autosomal dominant inherited disorder caused by germline mutations in the FLCN gene, and characterized by skin fibrofolliculomas, multiple lung cysts, spontaneous pneumothorax, and renal neoplasms. Pulmonary manifestations frequently develop earlier than other organ involvements, prompting a diagnosis of BHDS However, the mechanism of lung cyst formation and pathogenesis of pneumothorax have not yet been clarified. Fibroblasts were isolated from lung tissues obtained from patients with BHDS (n = 12) and lung cancer (n = 10) as controls...
November 2016: Physiological Reports
https://www.readbyqxmd.com/read/27871249/benign-clear-cell-sugar-tumor-of-the-lung-in-a-patient-with-birt-hogg-dub%C3%A3-syndrome-a-case-report
#20
Yoko Gunji-Niitsu, Toshio Kumasaka, Shigehiro Kitamura, Yoshito Hoshika, Takuo Hayashi, Hitoshi Tokuda, Riichiro Morita, Etsuko Kobayashi, Keiko Mitani, Mika Kikkawa, Kazuhisa Takahashi, Kuniaki Seyama
BACKGROUND: Birt-Hogg-Dubé (BHD) syndrome is a rare inherited autosomal genodermatosis and caused by germline mutation of the folliculin (FLCN) gene, a tumor suppressor gene of which protein product is involved in mechanistic target of rapamycin (mTOR) signaling pathway regulating cell growth and metabolism. Clinical manifestations in BHD syndrome is characterized by fibrofolliculomas of the skin, pulmonary cysts with or without spontaneous pneumothorax, and renal neoplasms. There has been no pulmonary neoplasm reported in BHD syndrome, although the condition is due to deleterious sequence variants in a tumor suppressor gene...
November 21, 2016: BMC Medical Genetics
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