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Matsuzaki Y, Harada T, Iwahashi F. In vitro and in planta investigation of succinate dehydrogenase inhibitor resistance conferred by target-site amino acid substitutions in Puccinia horiana, chrysanthemum white rust. Pest Manag Sci 2024; 80:2874-2880. [PMID: 38345375 DOI: 10.1002/ps.7995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 05/14/2024]
Abstract
BACKGROUND Resistance to succinate dehydrogenase inhibitor (SDHI) fungicides has been reported in some rust fungi within Pucciniales. However, measuring the resistance factors conferred by a specific substitution at the target site is difficult for most species because of the difficulty in performing in vitro experiments and the complexity of the binuclear state in these obligate parasites. We focused on Puccinia horiana because it easily forms homozygous basidiospores that are sensitive to SDHIs during in vitro germination, whereas the uredospores of other rust fungi are less sensitive. RESULTS We identified two substitutions, SdhC-I88F and SdhD-C125Y, that drive SDHI resistance in Pu. horiana. Using basidiospore germination inhibition tests, we measured the resistance factors for six SDHI fungicides in Pu. horiana isolates harboring SdhC-I88F substitutions, wherein orthologous substitutions were most frequently observed in SDHI-resistant Pucciniales, such as soybean rust (Phakopsora pachyrhizi). The resistance factors were high for penthiopyrad and benzovindiflupyr (>150), moderate for oxycarboxin and inpyrfluxam (10-30), and low for mepronil and fluxapyroxad (3-10). The most potent SDHI against SdhC-I88F-harboring isolates was inpyrfluxam, with a half-maximal effective concentration (EC50) of 0.0082 mg L-1 owing to its high intrinsic activity. SdhD-C125Y played a minor, but significant role in increasing the resistance factors (one- to tenfold increases), depending on the individual SDHIs. CONCLUSION This study is the first to use basidiospore germination inhibitory tests to quantify the resistance factors for SDHI-resistant Pucciniales. Owing to its homozygous binucleate nature and the high availability of basidiospores, Pu. horiana is useful for investigating SDHI resistance in Pucciniales. © 2024 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
- Yuichi Matsuzaki
- Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., Takarazuka, Japan
| | - Toshiyuki Harada
- Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., Takarazuka, Japan
| | - Fukumatsu Iwahashi
- Health and Crop Sciences Research Laboratory, Sumitomo Chemical Co., Ltd., Takarazuka, Japan
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Ozawa H. Current management of carotid body tumors. Auris Nasus Larynx 2024; 51:501-506. [PMID: 38522353 DOI: 10.1016/j.anl.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/03/2024] [Accepted: 01/23/2024] [Indexed: 03/26/2024]
Abstract
Carotid body tumors (CBTs) are neoplasms that occur at the bifurcation of the carotid artery and are pathologically classified as paragangliomas. In the 4th edition of the WHO classification, paragangliomas are categorized as neoplasms with malignant potential. Clinically, about 5% of CBTs present with malignant features such as metastasis. Currently, it is challenging to distinguish between tumors with benign courses and those that present malignantly. Recent advances in genetic testing have elucidated the genetic characteristics of paragangliomas, including carotid body tumors. Over 20 genes have been identified as being involved in tumor development. Particularly in head and neck paragangliomas, abnormalities in genes related to succinate dehydrogenase are frequently observed. Research is ongoing to understand the mechanisms by which these genes contribute to tumor development. The definitive treatment for CBTs is surgical resection. These tumors are prone to bleeding and often adhere firmly to the carotid artery, making intraoperative bleeding control challenging. The risk of lower cranial nerve paralysis is relatively high, and there is a risk of stroke because of manipulation of the carotid artery. Preoperative evaluation with angiography is essential, and a multi-disciplinary surgical team approach is necessary. In cases where the tumor is difficult to resect or has metastasized, radiation therapy or chemotherapy are employed. Clinical trials involving targeted molecular therapies and radiopharmaceuticals have recently been conducted, with some applied clinically. The development of various new treatments is anticipated, providing hope for therapeutic options in refractory cases.
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Affiliation(s)
- Hiroyuki Ozawa
- Department of Otolaryngology, Head and Neck Surgery, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan.
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Chen W, Li X, Wei L, Chen B, Han C, Duan Y, Chen C. Functional Differentiation of the Succinate Dehydrogenase Subunit SdhC Governs the Sensitivity to SDHI Fungicides, ROS Homeostasis, and Pathogenicity in Fusarium asiaticum. J Agric Food Chem 2024; 72:10314-10327. [PMID: 38661317 DOI: 10.1021/acs.jafc.4c02179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Succinate dehydrogenase (SDH) is an integral component of the tricarboxylic acid cycle (TCA) and respiratory electron transport chain (ETC), targeted by succinate dehydrogenase inhibitors (SDHIs). Fusarium asiaticum is a prominent phytopathogen causing Fusarium head blight (FHB) on wheat. Here, we characterized the functions of the FaSdhA, FaSdhB, FaSdhC1, FaSdhC2, and FaSdhD subunits. Deletion of FaSdhA, FaSdhB, or FaSdhD resulted in significant growth defects in F. asiaticum. The FaSdhC1 or FaSdhC2 deletion mutants exhibited substantial reductions in fungal growth, conidiation, virulence, and reactive oxygen species (ROS). The FaSdhC1 expression was significantly induced by pydiflumetofen (PYD). The ΔFaSdhC1 mutant displayed hypersensitivity to SDHIs, whereas the ΔFaSdhC2 mutant exhibited resistance against most SDHIs. The transmembrane domains of FaSdhC1 are essential for regulating mycelial growth, virulence, and sensitivity to SDHIs. These findings provided valuable insights into how the two SdhC paralogues regulated the functional integrity of SDH, ROS homeostasis, and the sensitivity to SDHIs in phytopathogenic fungi.
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Affiliation(s)
- Wenchan Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu, China
| | - Xiujuan Li
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Lingling Wei
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Bin Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Chenyang Han
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Yabing Duan
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Changjun Chen
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
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Peng Q, Tang L, Zhao C, Liao S, Miao J, Liu X. Sensitivity analysis and point mutations in BcSDHB confer cyclobutrifluram resistance in Botrytis cinerea from China. Pestic Biochem Physiol 2024; 201:105884. [PMID: 38685250 DOI: 10.1016/j.pestbp.2024.105884] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 03/16/2024] [Accepted: 03/19/2024] [Indexed: 05/02/2024]
Abstract
Botrytis cinerea is one of the most destructive pathogens worldwide. It can damage over 200 crops, resulting in significant yield and quality losses. Cyclobutrifluram, a new generation of succinate dehydrogenase inhibitors, exhibits excellent inhibitory activity against B. cinerea. However, the baseline sensitivity and resistance of B. cinerea to cyclobutrifluram remains poorly understood. This study was designed to monitor the sensitivity frequency distribution, assess the resistance risk, and clarify the resistance mechanism of B. cinerea to cyclobutrifluram. The baseline sensitivity of B. cinerea isolates to cyclobutrifluram was 0.89 μg/mL. Cyclobutrifluram-resistant B. cinerea populations are present in the field. Six resistant B. cinerea isolates investigated in this study possessed enhanced compound fitness index compared to the sensitive isolates according to mycelial growth, mycelial dry weight, conidiation, conidial germination rate, and pathogenicity. Cyclobutrifluram exhibited no cross-resistance with tebuconazole, fludioxonil, cyprodinil, or iprodione. Sequence alignment revealed that BcSDHB from cyclobutrifluram-resistant B. cinerea isolates had three single substitutions (P225F, N230I, or H272R). Molecular docking verified that these mutations in BcSDHB conferred cyclobutrifluram resistance in B. cinerea. In conclusion, the resistance risk of B. cinerea to cyclobutrifluram is high, and the point mutations in BcSDHB (P225F, N230I, or H272R) confer cyclobutrifluram resistance in B. cinerea. This study provided important insights into cyclobutrifluram resistance in B. cinerea and offered valuable information for monitoring and managing cyclobutrifluram resistance in the future.
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Affiliation(s)
- Qin Peng
- Key Laboratory of Plant Protection Resources and Pest Management of Ministry of Education, Key Laboratory of Integrated Pest Management on the Loess Plateau of Ministry of Agriculture and Rural Affairs, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Lijun Tang
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Chuang Zhao
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Shuailin Liao
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jianqiang Miao
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China.
| | - Xili Liu
- State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling 712100, Shaanxi, China; Department of Plant Pathology, College of Plant Protection, China Agricultural University, 2 Yuanmingyuanxi Road, Beijing 100193, China.
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Abstract
Objectives: To summarize the clinicopathological and genetic features of malignant paragangliomas in head and neck cancer and to explore the appropriate treatment options for this rare lesion. Methods: Six patients harboring head and neck malignant paraganglioma from Beijing Tongren Hospital were retrospectively reviewed. The clinicopathological characteristics, gene mutations, and prognosis of these patients were analyzed. Results: Of these 6 patients, 3 were male and 3 were female; 4 patients harbored malignant carotid body tumors, and two had malignant vagal paragangliomas. Three patients had cervical lymph node metastasis, two presented with lung and bone metastasis, and 1 had lung and liver metastasis. Of the 6 patients, four underwent surgical resection, and the other two patients denied surgery and instead received chemotherapy with paclitaxel, ifosfamide, and dacarbazine. These 2 patients with vagal paraganglioma received postoperative radiotherapy. All 6 patients are still alive at the present time, with a median follow-up time of 66 months. Positive Ki-67 expression in tumor tissue ranged from 1% to 40%. Genetic mutations in SDHD, SDHB, ATR, and MAP3K13 were identified in 4 patients. Conclusions: After comprehensive treatment, head and neck malignant paraganglioma can attain a favorable prognosis. Genetic mutations are commonly detected in patients with malignant paragangliomas. This study also identified mutations in ATR and MAP3K13 in these patients.
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Affiliation(s)
- Yiming Ding
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Capital Medical University, Beijing, China
| | - Lifeng Li
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Capital Medical University, Beijing, China
| | - Demin Han
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Capital Medical University, Beijing, China
| | - Shaozhong Wang
- Otolaryngology of Qinghai Provincial People's Hospital, Xining, Qinghai Province, China
| | - Xiaohong Chen
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, China
- Key Laboratory of Otolaryngology Head and Neck Surgery, Ministry of Education, Capital Medical University, Beijing, China
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Cui YY, Zhou Y, Gao YJ, Li TY, Wang Y, Zhang WQ, Zhou T, Chen S, Tong AL. [Clinical features of patients with metastatic pheochromocytoma/paraganglioma]. Zhonghua Yi Xue Za Zhi 2024; 104:1174-1179. [PMID: 38583049 DOI: 10.3760/cma.j.cn112137-20230820-00271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/08/2024]
Abstract
Objective: To analyze the clinical features of patients with metastatic pheochromocytoma/paraganglioma (PPGL). Methods: A follow-up study. The clinical data of 250 patients with metastatic PPGL treated at Peking Union Medical College Hospital from January 2018 to August 2023 were retrospectively analyzed, including 124 males and 126 females. The clinical features and treatment status of patients with metastatic PPGL were summarized and analyzed. Kaplan-Meier survival curve was used to evaluate patients' prognosis. Results: The age of onset, age of diagnosis, and age of tumor metastasis in patients with metastatic PPGL were (33.1±14.2) years, (35.4±15.2) years, and (40.7±15.3) years, respectively. Metastasis occurred in 26.4%(66/250) of patients at the time of initial diagnosis. Among patients without metastases at the time of initial diagnosis, the time from primary tumor resection to metastasis[M(Q1, Q3)] was 5.0 (3.0, 9.0) years, among which 20.1%(37/184) of patients had metastases more than 10 years after surgery. Most patients showed increased 24-hour urinary norepinephrine and plasma normetanephrine, accounting for 78.2%(176/225) and 78.7%(85/108), respectively. 42.3%(69/163) of patients had increased neuron specific enolase (NSE)levels. Germline mutations were screened in 201 patients, of which 55.2%(111/201) had germline pathogenic mutations. In patients with gene mutations, 76.5%(85/111) had SDHB mutations. 52.0%(130/250) of metastatic PPGL patients had primary sites outside the adrenal gland, with the Ki-67 index of 5% (3%, 8%). There were 85.6%(214/250) patients had multisystem metastasis, with bone metastasis being the most common site of metastasis, accounting for 60.8%(152/250). In terms of treatment, 32.8%(75/229) of patients underwent two treatment regimens and 8.7%(20/229) of patients underwent three treatment regimens. Most patients had a good prognosis, with a 5-year and 10-year survival rate of 88.0% and 84.0%, respectively. However, some patients had rapid disease progression, and as of August 2023, 30 patients died, and the time from diagnosis to death in deceased patients was 2.0 (1.0, 4.0) years. Conclusions: Patients with metastatic PPGL have a high rate of germline mutations, especially those with SDHB mutations. The metastatic PPGL is usually multisystem metastasis with the characteristics of mostly paraganglioma, large lesion diameter and high Ki-67 index.
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Affiliation(s)
- Y Y Cui
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y Zhou
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y J Gao
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - T Y Li
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y Wang
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - W Q Zhang
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - T Zhou
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - S Chen
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - A L Tong
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People's Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
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Yue MY, Wang R, Liu YM, Chen BW, Ding WL, Li Y. Resistance of the Ginseng Gray Mold Pathogen, Botrytis cinerea, to Boscalid and Pyraclostrobin Fungicides in China. Plant Dis 2024; 108:979-986. [PMID: 38012822 DOI: 10.1094/pdis-02-23-0321-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Gray mold caused by Botrytis cinerea severely threatens the yield of ginseng (Panax ginseng). Various categories of fungicides have been utilized to control gray mold on this crop. In this study, the resistance of 102 isolates of B. cinerea from 11 commercial ginseng-growing regions in China to fungicides was examined. A total of 32.4% were resistant to boscalid, with EC50 values that ranged from 12.26 to 235.87 μg/ml, and 94.1% were resistant to pyraclostrobin, with EC50 values that ranged from 5.88 to 487.72 μg/ml. Except for sdhA and sdhD, the amino acid substitutions of P225F, P225L, N230I, H272Y, and H272R in the sdhB subunit from 24 (4 sensitive [S] and 20 resistant [R]), 5 (1 S and 4 R), 1 (S), 1 (R), and 8 (4 S and 4 R) strains, respectively, and the concurrent amino acid substitutions of G85A + I93V + M158V + V168I in the sdhC subunit from 5 (4 S and 1 R) strains were identified. A G143A substitution in cytochrome b was identified in 96 isolates that were resistant to pyraclostrobin and three that were sensitive to it. The Bcbi-143/144 intron was identified in the other three isolates sensitive to pyraclostrobin, but it was absent in the isolates that harbored the G143A mutation. The results showed that the populations of B. cinerea on ginseng have developed strong resistance to pyraclostrobin. Therefore, it is not recommended to continue using this fungicide to control gray mold on P. ginseng. Boscalid is still effective against most isolates. However, to prevent fungicide resistance, it is recommended to use a mixture of boscalid with other categories of fungicides.
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Affiliation(s)
- Mo Yi Yue
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China
| | - Rong Wang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China
| | - Yan Min Liu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China
| | - Bing Wei Chen
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China
| | - Wan Long Ding
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China
| | - Yong Li
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China
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Park YG, Park I, Kim Y, Lee HS, Lee W, Yoon S, Lee JL. Outcomes of systemic treatment according to germline mutational status in patients with metastatic pheochromocytoma and paraganglioma. Clin Genitourin Cancer 2024; 22:413-419. [PMID: 38228412 DOI: 10.1016/j.clgc.2023.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 12/20/2023] [Accepted: 12/21/2023] [Indexed: 01/18/2024]
Abstract
INTRODUCTION Metastatic disease affects approximately 15% to 17% of patients with pheochromocytomas and paragangliomas (PPGLs). Unfortunately, treatment options for metastatic PPGLs are limited and rely on small, nonrandomized clinical trials. The impact of germline mutation status on systemic treatment outcomes remains unclear. To address these gaps, we retrospectively evaluated treatment outcomes in patients with PPGL. PATIENTS AND METHODS Between December 2004 and December 2021, 33 patients were diagnosed with metastatic PPGLs and received systemic treatment at the Department of Oncology, Asan Medical Center, Seoul, South Korea. RESULTS The median age of the patients was 49. Germline mutations were revealed in nine patients (39.1%) out of 23 who underwent germline testing, with SDHB mutation being the most frequent in 5 patients. Cyclophosphamide, vincristine, and dacarbazine (CVD) chemotherapy was administered to 18 patients, with an objective response rate (ORR) of 22% and a disease control rate (DCR) of 67%. The median progression-free survival (PFS) was 7.9 and the median overall survival (OS) was 36.2 months. Sunitinib was given to 6 patients, which had an ORR of 33%, a DCR of 83%, and a median PFS of 14.6 months. Notably, patients with SDHB/SDHD mutation (4 patients and one patient, respectively) who received CVD treatment had a significantly better OS than those without (median OS 94.0 months vs. 13.7 months, P = .01). CONCLUSION Our study reveals that CVD and sunitinib are effective treatments for metastatic PPGLs. The results are consistent with previous studies and patients with SDHB and SDHD mutations may benefit most from CVD treatment.
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Affiliation(s)
- Young-Gyu Park
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Inkeun Park
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Yongjae Kim
- Biochemistry and Molecular Biology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Ho-Su Lee
- Biochemistry and Molecular Biology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Woochang Lee
- Laboratory Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Shinkyo Yoon
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Jae Lyun Lee
- Department of Oncology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
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López Montalbán Á, Simón Frapolli VJ, Picón César MJ. [Genealogical tree study in patients with familial paraganglioma syndrome due to SDHD mutation]. Med Clin (Barc) 2024; 162:306-307. [PMID: 38042737 DOI: 10.1016/j.medcli.2023.10.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/14/2023] [Accepted: 10/18/2023] [Indexed: 12/04/2023]
Affiliation(s)
- Ángel López Montalbán
- Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Universitario Virgen de la Victoria, Campus Teatinos, Málaga, España.
| | - Víctor José Simón Frapolli
- Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Universitario Virgen de la Victoria, Campus Teatinos, Málaga, España
| | - María José Picón César
- Unidad de Gestión Clínica de Endocrinología y Nutrición, Hospital Universitario Virgen de la Victoria, Campus Teatinos, Málaga, España
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Gao L, Huang M, Xiong Q, Liang Y, Mi L, Jiang Y, Zhang J. Antibacterial Mechanism, Control Efficiency, and Nontarget Toxicity Evaluation of Actinomycin X 2 against Xanthomonas citri Subsp. citri. J Agric Food Chem 2024; 72:4788-4800. [PMID: 38377546 DOI: 10.1021/acs.jafc.3c08600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
The present study investigated the antibacterial mechanism, control efficiency, and nontarget toxicity of actinomycin X2 (Act-X2) against Xanthomonas citri subsp. citri (Xcc) for the first time. Act-X2 almost completely inhibited the proliferation of Xcc in the growth curve assay at a concentration of 0.25 MIC (minimum inhibitory concentration, MIC = 31.25 μg/mL). This inhibitory effect was achieved by increasing the production of reactive oxygen species (ROS), blocking the formation of biofilms, obstructing the synthesis of intracellular proteins, and decreasing the enzymatic activities of malate dehydrogenase (MDH) and succinate dehydrogenase (SDH) of Xcc. Molecular docking and quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) analysis results indicated that Act-X2 steadily bonded to the RNA polymerase, ribosome, malate dehydrogenase, and succinate dehydrogenase to inhibit their activities, thus drastically reducing the expression levels of related genes. Act-X2 showed far more effectiveness than the commercially available pesticide Cu2(OH)3Cl in the prevention and therapy of citrus canker disease. Furthermore, the nontarget toxicity evaluation demonstrated that Act-X2 was not phytotoxic to citrus trees and exhibited minimal toxicity to earthworms in both contact and soil toxic assays. This study suggests that Act-X2 has the potential as an effective and environmentally friendly antibacterial agent.
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Affiliation(s)
- Liangliang Gao
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Meiling Huang
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Qin Xiong
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Yan Liang
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Lanfang Mi
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
| | - Yueming Jiang
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
- South China Botanical Garden, Chinese Academy of Science, Guangzhou 510650, China
| | - Jun Zhang
- National Engineering Research Center of Navel Orange, Gannan Normal University, Ganzhou 341000, China
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Zhang K, Yang P, Li M, Xiang P, Cheng Z, Zhou X. Pediatric malignant pheochromocytoma with atypical presentation as vision changes, lung metastasis, and recurrence: a case report. J Med Case Rep 2024; 18:134. [PMID: 38439039 PMCID: PMC10913404 DOI: 10.1186/s13256-023-04329-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 12/20/2023] [Indexed: 03/06/2024] Open
Abstract
BACKGROUND This case report documents a case of malignant pheochromocytoma manifested as vision changes with lung metastasis and recurrence. CASE PRESENTATION A 10-year-old Han Chinese girl presented with vision changes and was eventually diagnosed with pheochromocytoma by contrast-enhanced computed tomography, urine vanillylmandelic acid. After medication for hypertension and surgery, clinical symptoms disappeared. Malignant pheochromocytoma with lung metastasis was confirmed histologically using the Pheochromocytoma of the Adrenal Gland Scaled Score scoring system and genetically with succinate dehydrogenase complex iron sulfur subunit B mutation, and 3 months later, unplanned surgery was performed because of the high risks and signs of recurrence. She is asymptomatic as of the writing of this case report. Our patient's case highlights the importance of considering a diagnosis of malignant pheochromocytoma, and long-term follow-up for possible recurrence. CONCLUSION Although there are well-recognized classic clinical manifestations associated with pheochromocytoma, atypical presentation, such as vision changes in children, should be considered. In addition, malignant pheochromocytoma children with a high Pheochromocytoma of the Adrenal Gland Scaled Score and succinate dehydrogenase complex iron sulfur subunit B mutation require a long-term follow-up or even unplanned surgery because of the higher risk of recurrence.
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Affiliation(s)
- Kaijun Zhang
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Zhongshan 2nd Road, No.136, Yuzhong District, Chongqing, 400014, China
| | - Penghui Yang
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Zhongshan 2nd Road, No.136, Yuzhong District, Chongqing, 400014, China
| | - Mi Li
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Zhongshan 2nd Road, No.136, Yuzhong District, Chongqing, 400014, China
| | - Ping Xiang
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Zhongshan 2nd Road, No.136, Yuzhong District, Chongqing, 400014, China
| | - Zhenli Cheng
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Zhongshan 2nd Road, No.136, Yuzhong District, Chongqing, 400014, China
| | - Xue Zhou
- Department of Cardiovascular Medicine, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Zhongshan 2nd Road, No.136, Yuzhong District, Chongqing, 400014, China.
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12
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Taïeb D, Nölting S, Perrier ND, Fassnacht M, Carrasquillo JA, Grossman AB, Clifton-Bligh R, Wanna GB, Schwam ZG, Amar L, Bourdeau I, Casey RT, Crona J, Deal CL, Del Rivero J, Duh QY, Eisenhofer G, Fojo T, Ghayee HK, Gimenez-Roqueplo AP, Gill AJ, Hicks R, Imperiale A, Jha A, Kerstens MN, de Krijger RR, Lacroix A, Lazurova I, Lin FI, Lussey-Lepoutre C, Maher ER, Mete O, Naruse M, Nilubol N, Robledo M, Sebag F, Shah NS, Tanabe A, Thompson GB, Timmers HJLM, Widimsky J, Young WJ, Meuter L, Lenders JWM, Pacak K. Management of phaeochromocytoma and paraganglioma in patients with germline SDHB pathogenic variants: an international expert Consensus statement. Nat Rev Endocrinol 2024; 20:168-184. [PMID: 38097671 DOI: 10.1038/s41574-023-00926-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/16/2023] [Indexed: 02/17/2024]
Abstract
Adult and paediatric patients with pathogenic variants in the gene encoding succinate dehydrogenase (SDH) subunit B (SDHB) often have locally aggressive, recurrent or metastatic phaeochromocytomas and paragangliomas (PPGLs). Furthermore, SDHB PPGLs have the highest rates of disease-specific morbidity and mortality compared with other hereditary PPGLs. PPGLs with SDHB pathogenic variants are often less differentiated and do not produce substantial amounts of catecholamines (in some patients, they produce only dopamine) compared with other hereditary subtypes, which enables these tumours to grow subclinically for a long time. In addition, SDHB pathogenic variants support tumour growth through high levels of the oncometabolite succinate and other mechanisms related to cancer initiation and progression. As a result, pseudohypoxia and upregulation of genes related to the hypoxia signalling pathway occur, promoting the growth, migration, invasiveness and metastasis of cancer cells. These factors, along with a high rate of metastasis, support early surgical intervention and total resection of PPGLs, regardless of the tumour size. The treatment of metastases is challenging and relies on either local or systemic therapies, or sometimes both. This Consensus statement should help guide clinicians in the diagnosis and management of patients with SDHB PPGLs.
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Affiliation(s)
- David Taïeb
- Department of Nuclear Medicine, Aix-Marseille University, La Timone University Hospital, Marseille, France
| | - Svenja Nölting
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich and University of Zurich, Zurich, Switzerland
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Nancy D Perrier
- Department of Surgical Oncology, MD Anderson Cancer Center, Houston, TX, USA
| | - Martin Fassnacht
- Department of Medicine, Division of Endocrinology and Diabetes, University Hospital, University of Würzburg, Würzburg, Germany
| | - Jorge A Carrasquillo
- Molecular Imaging and Therapy Service, Radiology Department, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Ashley B Grossman
- Green Templeton College, University of Oxford, Oxford, UK
- NET Unit, Royal Free Hospital, London, UK
| | - Roderick Clifton-Bligh
- Department of Endocrinology, Royal North Shore Hospital and Cancer Genetics Laboratory, Kolling Institute, University of Sydney, Sydney, New South Wales, Australia
| | - George B Wanna
- Department of Otolaryngology-Head and Neck Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Zachary G Schwam
- Department of Otolaryngology-Head and Neck Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Laurence Amar
- Université Paris Cité, Inserm, PARCC, Equipe Labellisée par la Ligue contre le Cancer, Paris, France
- Hypertension Unit, Hôpital Européen Georges Pompidou, Assistance Publique - Hôpitaux de Paris, Paris, France
| | - Isabelle Bourdeau
- Division of Endocrinology, Department of Medicine and Research Center, Centre hospitalier de l'Université de Montréal (CHUM), Montréal, Québec, Canada
| | - Ruth T Casey
- Department of Medical Genetics, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Joakim Crona
- Department of Medical Sciences, Uppsala University, Uppsala, Sweden
| | - Cheri L Deal
- Research Center, CHU Sainte-Justine and Dept. of Paediatrics, University of Montreal, Montreal, Québec, Canada
| | - Jaydira Del Rivero
- Developmental Therapeutics Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Quan-Yang Duh
- Department of Surgery, UCSF-Mount Zion, San Francisco, CA, USA
| | - Graeme Eisenhofer
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus at the TU Dresden, Dresden, Germany
| | - Tito Fojo
- Columbia University Irving Medical Center, New York City, NY, USA
- James J. Peters VA Medical Center, New York City, NY, USA
| | - Hans K Ghayee
- Division of Endocrinology & Metabolism, Department of Medicine, University of Florida, Gainesville, FL, USA
- Malcom Randall VA Medical Center, Gainesville, FL, USA
| | - Anne-Paule Gimenez-Roqueplo
- Université Paris Cité, Inserm, PARCC, Equipe Labellisée par la Ligue contre le Cancer, Paris, France
- Department of Oncogenetics and Cancer Genomic Medicine, AP-HP, Hôpital européen Georges Pompidou, Paris, France
| | - Antony J Gill
- University of Sydney, Sydney NSW Australia, Cancer Diagnosis and Pathology Group Kolling Institute of Medical Research, Royal North Shore Hospital, St Leonards, New South Wales, Australia
- NSW Health Pathology Department of Anatomical Pathology, Royal North Shore Hospital, St Leonards, New South Wales, Australia
| | - Rodney Hicks
- Department of Medicine, St Vincent's Hospital Medical School, Melbourne, Victoria, Australia
| | - Alessio Imperiale
- Department of Nuclear Medicine and Molecular Imaging - Institut de Cancérologie de Strasbourg Europe (ICANS), IPHC, UMR 7178, CNRS, University of Strasbourg, Strasbourg, France
| | - Abhishek Jha
- Section on Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Michiel N Kerstens
- Department of Endocrinology, University Medical Center Groningen, Groningen, Netherlands
| | - Ronald R de Krijger
- Department of Pathology, University Medical Center Utrecht, Utrecht, Netherlands
- Princess Máxima Center for paediatric oncology, Utrecht, Netherlands
| | - André Lacroix
- Division of Endocrinology, Department of Medicine, Centre de recherche du Centre hospitalier de l'Université de Montréal, Université de Montréal, Montréal, Canada
| | - Ivica Lazurova
- Department of Internal Medicine 1, University Hospital, P.J. Šafárik University, Košice, Slovakia
| | - Frank I Lin
- Molecular Imaging Program, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Charlotte Lussey-Lepoutre
- Université Paris Cité, Inserm, PARCC, Equipe Labellisée par la Ligue contre le Cancer, Paris, France
- Sorbonne University, Department of Nuclear Medicine, Pitié-Salpêtrière, Paris, France
| | - Eamonn R Maher
- Department of Medical Genetics, University of Cambridge, Cambridge Biomedical Campus, Cambridge, UK
| | - Ozgur Mete
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Mitsuhide Naruse
- Clinical Research Institute of Endocrinology and Metabolism, National Hospital Organization Kyoto Medical Center and Endocrine Center, Kyoto, Japan
- Clinical Research Center, Ijinkai Takeda General Hospital, Kyoto, Japan
| | - Naris Nilubol
- Surgical Oncology Program, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - Mercedes Robledo
- Hereditary Endocrine Cancer Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Institute of Health Carlos III (ISCIII), Madrid, Spain
| | - Frédéric Sebag
- Department of Endocrine Surgery, Aix-Marseille University, Conception Hospital, Marseille, France
| | - Nalini S Shah
- Department of Endocrinology, Seth GS Medical College and KEM Hospital, Mumbai, Maharashtra, India
| | - Akiyo Tanabe
- Department of Diabetes, Endocrinology and Metabolism, National Center for Global Health and Medicine, Tokyo, Japan
| | - Geoffrey B Thompson
- Division of Endocrine Surgery, Department of Surgery, Mayo Clinic, Rochester, MN, USA
| | - Henri J L M Timmers
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - Jiri Widimsky
- Third Department of Medicine, Department of Endocrinology and Metabolism of the First Faculty of Medicine, Charles University and General University Hospital, Prague, Czech Republic
| | - William J Young
- Division of Endocrinology, Diabetes, Metabolism, and Nutrition, Mayo Clinic, Rochester, MN, USA
| | - Leah Meuter
- Stanford University School of Medicine, Department of Physician Assistant Studies, Stanford, CA, USA
| | - Jacques W M Lenders
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - Karel Pacak
- Section on Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA.
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Nishida T, Naito Y, Takahashi T, Saito T, Hisamori S, Manaka D, Ogawa K, Hirota S, Ichikawa H. Molecular and clinicopathological features of KIT/PDGFRA wild-type gastrointestinal stromal tumors. Cancer Sci 2024; 115:894-904. [PMID: 38178783 PMCID: PMC10920999 DOI: 10.1111/cas.16058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/22/2023] [Accepted: 12/06/2023] [Indexed: 01/06/2024] Open
Abstract
Approximately 10% of gastrointestinal stromal tumors (GISTs) harbor reportedly no KIT and PDGFRA mutations (wild-type GISTs). The clinicopathological features and oncologic outcomes of wild-type GISTs based on molecular profiles are unknown. We recruited 35 wild-type GIST patients from the two registry studies of high-risk GISTs between 2012 and 2015 and primary GISTs between 2003 and 2014. Molecular profiling of wild-type GISTs was performed by targeted next-generation sequencing (NGS) using formalin-fixed paraffin-embedded tumor samples. Among 35 wild-type GISTs, targeted NGS analysis detected NF1, SDH, or BRAF mutation: 16 NF1-GISTs with various NF1 mutations, 12 SDH-GISTs (4 with SDHA mutations, 4 with SDHB mutations, and 4 with SDHB-negative staining), and 5 BRAF-GISTs with the V600E mutation. Two GISTs showed no mutations based on our targeted NGS analysis. Additional gene mutations were infrequent in primary wild-type GISTs and found in TP53, CREBBP, CDKN2A, and CHEK2. Most NF1-GISTs were located in the small intestine (N = 12; 75%) and showed spindle cell features (N = 15; 94%) and multiple tumors (N = 6, 38%) with modest proliferation activities. In contrast, SDH-GISTs were predominantly found in the stomach (N = 11; 92%), exhibiting epithelioid cell (N = 6; 50%) and multiple (N = 6, 50%) features. The overall survival of patients with SDH-GISTs appeared to be better than that of BRAF-GISTs (p = 0.0107) or NF1-GISTs (p = 0.0754), respectively. In conclusion, major molecular changes in wild-type GISTs include NF1, SDH, and BRAF. NF1-GISTs involved multifocal spindle cell tumors in the small intestine. SDH-GISTs occurred in young patients and were multifocal in the stomach and clinically indolent.
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Affiliation(s)
- Toshirou Nishida
- Department of SurgeryJapan Community Health‐care Organization Osaka HospitalOsakaJapan
- Department of SurgeryNational Cancer Center HospitalTokyoJapan
- National Institute of Biomedical Innovation, Health and Nutrition, Laboratory of Nuclear Transport DynamicsIbarakiJapan
| | - Yoichi Naito
- Department of General Internal MedicineNational Cancer Center Hospital EastKashiwaJapan
- Department of Experimental TherapeuticsNational Cancer Center Hospital EastKashiwaJapan
- Department of Medical OncologyNational Cancer Center Hospital EastKashiwaJapan
| | - Tsuyoshi Takahashi
- Department of Gastroenterological SurgeryOsaka University Graduate School of MedicineSuitaJapan
| | - Takuro Saito
- Department of Gastroenterological SurgeryOsaka University Graduate School of MedicineSuitaJapan
- Department of SurgeryOsaka Police HospitalOsakaJapan
| | - Shigeo Hisamori
- Department of Surgery, Graduate School of MedicineKyoto UniversityKyotoJapan
| | - Dai Manaka
- Department of SurgeryKyoto Katsura HospitalKyotoJapan
| | - Katsuhiro Ogawa
- Department of SurgerySaiseikai Kumamoto HospitalKumamotoJapan
| | - Seiichi Hirota
- Department of Surgical PathologyHyogo Medical University School of MedicineNishinomiyaJapan
| | - Hitoshi Ichikawa
- Department of Clinical GenomicsNational Cancer Center Research InstituteTokyoJapan
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14
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Wang C, Zhao F, Wu Z, Cai X, Zhou M, Hou Y. Mitochondria-Associated Protein FgNdk1 Regulates the Development, Pathogenicity, and SDHI Fungicide Sensitivity of Fusarium graminearum by Interacting with Succinate Dehydrogenase. J Agric Food Chem 2024; 72:3913-3925. [PMID: 38355300 DOI: 10.1021/acs.jafc.3c07934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
Nucleoside diphosphate kinase (NDK) plays an important role in many cellular processes in all organisms. In this study, we functionally characterized a nucleoside diphosphate kinase (FgNdk1) in Fusarium graminearum, a causal agent of Fusarium head blight (FHB). FgNdk1 was involved in the generation of energy in the electron-transfer chain by interacting with succinate dehydrogenase (FgSdhA, FgSdhC1, and FgSdhC2). Deletion of FgNdk1 not only resulted in abnormal mitochondrial morphology, decreased ATP content, defective fungal development, and impairment in the formation of the toxisome but also led to the suppressed expression level of DON biosynthesis enzymes, decreased DON biosynthesis, and declined pathogenicity as well. Furthermore, deletion of FgNdk1 caused increasing transcriptional levels of FgSdhC1 and FgdhC2, in the presence of pydiflumetofen, related to the decreased sensitivity to SDHI fungicides. Overall, this study identified a new regulatory mechanism of FgNdk1 in the pathogenicity and SDHI fungicide sensitivity of Fusarium graminearum.
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Affiliation(s)
- Chenguang Wang
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Feifei Zhao
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - ZhiWen Wu
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Xiaowei Cai
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Mingguo Zhou
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
| | - Yiping Hou
- College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China
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15
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Seabrook A, Vasudevan A, Neville K, Gerstl B, Benn D, Smith J, Kirk J, Gill A, Clifton-Bligh R, Tucker K. Genotype-phenotype correlations in paediatric and adolescent phaeochromocytoma and paraganglioma: a cross-sectional study. Arch Dis Child 2024; 109:201-208. [PMID: 38071512 DOI: 10.1136/archdischild-2023-325419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 10/16/2023] [Indexed: 02/21/2024]
Abstract
Phaeochromocytoma (PC) and paraganglioma (PGL) syndromes associated with germline pathogenic variants are associated with high morbidity and mortality. Establishing genotype-phenotype correlations within a young population is challenging due to their rare occurrence. OBJECTIVE To describe genotype-phenotype correlations in paediatric and adolescent patients diagnosed with PC/PGL. To establish the incidence of PC/PGL in a young population and prevalence of germline pathogenic variants within this group. STUDY DESIGN We conducted a cross-sectional study of patients diagnosed with a PC/PGL aged 0-21 years old who were reviewed within Familial Cancer Services within New South Wales and the Australian Capital Territory, Australia. RESULTS A germline pathogenic variant was detected in 80% (24/30) of patients; SDHB: n=12, VHL: n=11, and MAX: n=1. Only patients harbouring a germline pathogenic variant reported a family history of syndromic tumours, those with apparently sporadic disease did not (62.5% versus 0%, p=0.02). All patients with VHL presented with an adrenal tumour compared with 25% of those with SDHB (100% versus 25%, p=0.01). Occurrence of multiple primary PC/PGL was seen in patients with VHL however was absent in patients with SDHB (36% versus 0%, p=0.03). Incidence rate of paediatric PC/PGL was 0.45 cases per million person years. CONCLUSIONS PC/PGL diagnosed in children and adolescents were strongly associated with germline pathogenic variants in VHL or SDHB. These patients should be referred to specialist services for family counselling and genetic testing along followed by investigations for the detection of bilateral, multifocal or metastatic disease, and lifelong surveillance for recurrent disease.
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Affiliation(s)
- Amanda Seabrook
- Cancer Genetics Diagnostic Laboratory, Kolling Institute of Medical Research, Sydney, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Anand Vasudevan
- Deaprtment of Clinical Genetics, The Royal Women's Hospital, Parkville, Victoria, Australia
| | - Kristen Neville
- Department of Endocrinology, Sydney Children's Hospital Randwick, Randwick, New South Wales, Australia
- Faculty of Medicine, School of Women's and Children's Health, University of New South Wales, Sydney, New South Wales, Australia
| | - Brigitte Gerstl
- The Kids Cancer Centre, Sydney Children's Hospital Randwick, Randwick, New South Wales, Australia
- The Kirby Institute, University of New South Wales, Sydney, New South Wales, Australia
| | - Diana Benn
- Cancer Genetics Diagnostic Laboratory, Kolling Institute of Medical Research, Sydney, New South Wales, Australia
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
| | - Janine Smith
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Department of Clinical Genetics, The Children's Hospital at Westmead, Westmead, New South Wales, Australia
| | - Judy Kirk
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Familial Cancer Service, Westmead Hospital, Westmead, New South Wales, Australia
| | - Anthony Gill
- Faculty of Medicine and Health, The University of Sydney, Sydney, New South Wales, Australia
- Department of Anatomical Pathology, Royal North Shore Hospital, St Leonards, New South Wales, Australia
| | - Roderick Clifton-Bligh
- Cancer Genetics Diagnostic Laboratory, Kolling Institute of Medical Research, Sydney, New South Wales, Australia
- Department of Diabetes, Endocrinology and Metabolism, Royal North Shore Hospital, St Leonards, New South Wales, Australia
| | - Katherine Tucker
- Hereditary Cancer Service, Prince of Wales Hospital Nelune Comprehensive Cancer Centre, Randwick, New South Wales, Australia
- Faculty of Medicine and Health, University of New South Wales, Sydney, New South Wales, Australia
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16
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White JA, Rodriguez J, Kandadai J, Kardas E, Chohan F, Michel G. Increased anxiety and emotional lability in a patient with SDHB gene mutation paraganglioma: a call to multidisciplinary approach. Endocrine 2024; 83:349-352. [PMID: 37821692 DOI: 10.1007/s12020-023-03555-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 09/25/2023] [Indexed: 10/13/2023]
Abstract
Paragangliomas are neuroendocrine tumors that have the potential to secrete catecholamines. They have been linked to genetic mutations in the mitochondrial succinate dehydrogenase (SDH) complex. Patients can experience both physical symptoms and psychiatric symptoms like anxiety, depression, and psychosis. These symptoms can occur as paroxysmal episodes with periods of increased catecholamine secretion. We describe a patient with SDHB gene mutation, who has been diagnosed with a jugular paraganglioma, and was brought to the hospital under Baker Act for threats made online. Since diagnosis this patient has been experiencing both anxiety and post-traumatic stress disorder (PTSD). The patient and a family member report increased emotional lability, and the patient reports multiple daily episodes of anxiousness. This case outlines the connection between paragangliomas and psychiatric symptoms, the impact they can have on patients' daily lives, and the importance of addressing the possibility of these symptoms and establishing a multispecialty healthcare team at the time of diagnosis.
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Affiliation(s)
- Joseph Allen White
- Ross University School of Medicine, Two Mile Hill St. Michael, Bridgetown, BB11093, Barbados.
| | - James Rodriguez
- Ross University School of Medicine, Two Mile Hill St. Michael, Bridgetown, BB11093, Barbados
| | - Jagan Kandadai
- Nova Southeastern University Dr. Kiran C. Patel College of Osteopathic Medicine, 3200 S University Dr, Davie, FL, 33328, USA
| | - Einas Kardas
- The Faculty of Medicine of Damascus University, G748+VRH, Damascus, Syria
| | - Farrah Chohan
- Larkin Community Hospital, Department of Internal Medicine, 7031 SW 62nd Ave, South Miami, FL, 33143, USA
| | - George Michel
- Larkin Community Hospital, Department of Internal Medicine, 7031 SW 62nd Ave, South Miami, FL, 33143, USA
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17
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Zmuda AJ, Kang X, Wissbroecker KB, Freund Saxhaug K, Costa KC, Hegeman AD, Niehaus TD. A universal metabolite repair enzyme removes a strong inhibitor of the TCA cycle. Nat Commun 2024; 15:846. [PMID: 38287013 PMCID: PMC10825186 DOI: 10.1038/s41467-024-45134-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 01/16/2024] [Indexed: 01/31/2024] Open
Abstract
A prevalent side-reaction of succinate dehydrogenase oxidizes malate to enol-oxaloacetate (OAA), a metabolically inactive form of OAA that is a strong inhibitor of succinate dehydrogenase. We purified from cow heart mitochondria an enzyme (OAT1) with OAA tautomerase (OAT) activity that converts enol-OAA to the physiological keto-OAA form, and determined that it belongs to the highly conserved and previously uncharacterized Fumarylacetoacetate_hydrolase_domain-containing protein family. From all three domains of life, heterologously expressed proteins were shown to have strong OAT activity, and ablating the OAT1 homolog caused significant growth defects. In Escherichia coli, expression of succinate dehydrogenase was necessary for OAT1-associated growth defects to occur, and ablating OAT1 caused a significant increase in acetate and other metabolites associated with anaerobic respiration. OAT1 increased the succinate dehydrogenase reaction rate by 35% in in vitro assays with physiological concentrations of both succinate and malate. Our results suggest that OAT1 is a universal metabolite repair enzyme that is required to maximize aerobic respiration efficiency by preventing succinate dehydrogenase inhibition.
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Affiliation(s)
- Anthony J Zmuda
- Department of Plant and Microbial Biology, University of Minnesota, Twin Cities, Saint Paul, MN, 55108, USA
| | - Xiaojun Kang
- Department of Plant and Microbial Biology, University of Minnesota, Twin Cities, Saint Paul, MN, 55108, USA
| | - Katie B Wissbroecker
- Department of Plant and Microbial Biology, University of Minnesota, Twin Cities, Saint Paul, MN, 55108, USA
| | - Katrina Freund Saxhaug
- Department of Horticultural Science, University of Minnesota, Twin Cities, Saint Paul, MN, 55108, USA
| | - Kyle C Costa
- Department of Plant and Microbial Biology, University of Minnesota, Twin Cities, Saint Paul, MN, 55108, USA
| | - Adrian D Hegeman
- Department of Plant and Microbial Biology, University of Minnesota, Twin Cities, Saint Paul, MN, 55108, USA
- Department of Horticultural Science, University of Minnesota, Twin Cities, Saint Paul, MN, 55108, USA
| | - Thomas D Niehaus
- Department of Plant and Microbial Biology, University of Minnesota, Twin Cities, Saint Paul, MN, 55108, USA.
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Rogala J, Zhou M. Hereditary succinate dehydrogenase-deficient renal cell carcinoma. Semin Diagn Pathol 2024; 41:32-41. [PMID: 37981479 DOI: 10.1053/j.semdp.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/06/2023] [Indexed: 11/21/2023]
Abstract
Succinate dehydrogenase (SDH), formed by four subunits SDHA, SDHB, SDHC, SDHD, and an assembly factor SDHAF2, functions as a key respiratory enzyme. Biallelic inactivation of genes encoding any of the components, almost always in the presence of a germline mutation, causes loss of function of the entire enzyme complex (so-called SDH deficiency) and subsequent development of SDH-deficient neoplasms which include pheochromocytoma/paraganglioma, gastrointestinal stromal tumor, and renal cell carcinoma (RCC). These tumors may occur in the same patient or kindred. SDH-deficient RCC shows distinctive morphological features with vacuolated eosinophilic cytoplasm due to distinctive cytoplasmatic inclusions containing flocculent material. The diagnosis is confirmed by loss of SDHB on immunohistochemistry with positive internal control. The majority of tumors occur in the setting of germline mutations in one of the SDH genes, most commonly SDHB. The prognosis is excellent for low-grade tumors but worse for high-grade tumors with high-grade nuclei, sarcomatoid change, or coagulative necrosis. Awareness of the morphological features and low-threshold for applying SDHB immunohistochemistry help identify patients with SDH-deficient RCC and hereditary SDH-deficient tumor syndromes. In this review we summarize recent development on the clinical and genetic features, diagnostic approach, and pitfalls of SDH-deficient syndrome, focusing on SDH-deficient renal cell carcinomas.
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Affiliation(s)
- Joanna Rogala
- Department of Pathology, Faculty of Medicine in Pilsen, Charles University, Czech Republic; Department of Pathology, Regional Specialist Hospital, Wrocław, Poland; Department of Pathology, Public Specialist Hospital, Nowa Sól, Poland
| | - Ming Zhou
- Department of Pathology and Laboratory Medicine, Tufts Medical Center, Boston, MA, USA; Department of Anatomic and Clinical Pathology, Tufts University School of Medicine, Boston, MA, USA.
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Sun H, Cai S, Liu H, Li X, Deng Y, Yang X, Cao S, Li W, Chen H. FgSdhC Paralog Confers Natural Resistance toward SDHI Fungicides in Fusarium graminearum. J Agric Food Chem 2023; 71:20643-20653. [PMID: 38108286 DOI: 10.1021/acs.jafc.3c06288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2023]
Abstract
Fusarium graminearum exhibited natural resistance to a majority of succinate dehydrogenase inhibitor fungicides (SDHIs) and the molecular mechanisms responsible for the natural resistance were still unknown. Succinate dehydrogenase subunit C (SdhC) is an essential gene for maintaining succinate-ubiquinone oxidoreductase (SQR) function in fungi. In F. graminearum, a paralog of FgSdhC named as FgSdhC1 was identified. Based on RNA-Seq and qRT-PCR assay, we found that the expression level of FgSdhC1 was very low but upregulated by SDHIs treatment. Based on reverse genetics, we demonstrated that FgSdhC1 was an inessential gene in normal growth but was sufficient for maintaining SQR function and conferred natural resistance or reduced sensitivity toward SDHIs. Additionally, we found that the standard F. graminearum isolate PH-1 had high sensitivity to a majority of SDHIs. A single nucleotide variation (C to T) in the FgSdhC1 of isolate PH-1, resulting in a premature termination codon (TAA) replacing the fourth amino acid glutamine (Q), led to the failure of FgSdhC1 to perform functions of conferring nature resistance. These results established that a dispensable paralogous gene determined SDHIs resistance in natural populations of F. graminearum.
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Affiliation(s)
- Haiyan Sun
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Shiyan Cai
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Huiquan Liu
- College of Plant Protection, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Xinlei Li
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yuanyu Deng
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Xiaoyue Yang
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Shulin Cao
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Wei Li
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Huaigu Chen
- Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
- Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, Jiangsu 225009, China
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20
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Zhou Y, Gao Y, Ma X, Li T, Cui Y, Wang Y, Li M, Zhang D, Tong A. Development and internal validation of a novel predictive model for SDHB mutations in pheochromocytomas and retroperitoneal paragangliomas. Front Endocrinol (Lausanne) 2023; 14:1285631. [PMID: 38179299 PMCID: PMC10764617 DOI: 10.3389/fendo.2023.1285631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 11/20/2023] [Indexed: 01/06/2024] Open
Abstract
Aim To develop and internally validate a novel predictive model for SDHB mutations in pheochromocytomas and retroperitoneal paragangliomas (PPGLs). Methods Clinical data of patients with PPGLs who presented to Peking Union Medical College Hospital from 2013 to 2022 and underwent genetic testing were retrospectively collected. Variables were screened by backward stepwise and clinical significance and were used to construct multivariable logistic models in 50 newly generated datasets after the multiple imputation. Bootstrapping was used for internal validation. A corresponding nomogram was generated based on the model. Sensitivity analyses were also performed. Results A total of 556 patients with PPGLs were included, of which 99 had a germline SDHB mutation. The prediction model revealed that younger age of onset [Odds ratio (OR): 0.93, 95% CI: 0.91-0.95], synchronous metastasis (OR: 6.43, 95% CI: 2.62-15.80), multiple lesion (OR: 0.22, 95% CI: 0.09-0.54), retroperitoneal origin (OR: 5.72, 95% CI: 3.13-10.47), negative 131I-meta-iodobenzylguanidine (MIBG) (OR: 0.34, 95% CI: 0.15-0.73), positive octreotide scintigraphy (OR: 3.24, 95% CI: 1.25-8.43), elevated 24h urinary dopamine (DA) (OR: 1.72, 95% CI: 0.93-3.17), NE secretory type (OR: 2.83, 95% CI: 1.22- 6.59), normal secretory function (OR: 3.04, 95% CI: 1.04-8.85) and larger tumor size (OR: 1.09, 95% CI: 0.99-1.20) were predictors of SDHB mutations in PPGLs, and showed good and stable predictive performance with a mean area under the ROC curve (AUC) of 0.865 and coefficient of variation of 2.2%. Conclusions This study provided a novel and useful tool for predicting SDHB mutations by integrating easily obtained clinical data. It may help clinicians select suitable genetic testing methods and make appropriate clinical decisions for these high-risk patients.
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Affiliation(s)
- Yue Zhou
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People’s Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yinjie Gao
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People’s Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Xiaosen Ma
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People’s Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Tianyi Li
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People’s Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yunying Cui
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People’s Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Yu Wang
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People’s Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Ming Li
- Department of Laboratory Medicine, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Dingding Zhang
- Medical Research Center, State Key Laboratory of Complex Severe and Rare Diseases, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Anli Tong
- Department of Endocrinology, Key Laboratory of Endocrinology, National Health Commission of the People’s Republic of China, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
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Alzahrani AS, Bin Nafisah A, Alswailem M, Moria Y, Poprawski D, Al-Hindi H, Pacak K. An aggressive cabergoline-resistant, temozolomide-responsive macroprolactinoma due to a germline SDHB pathogenic variant in the absence of paraganglioma or pheochromocytoma. Front Endocrinol (Lausanne) 2023; 14:1273093. [PMID: 38152133 PMCID: PMC10751293 DOI: 10.3389/fendo.2023.1273093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 10/24/2023] [Indexed: 12/29/2023] Open
Abstract
Context Germline succinate dehydrogenase subunit B (SDHB) pathogenic variants are characteristic of familial paraganglioma (PGL) syndrome type 4. This syndrome frequently presents with abdominal PGL and has high tendency for locally aggressive behavior and distant metastasis. The vast majority of pituitary adenomas (PAs) are sporadic. However, PAs can be part of a number of familial tumor syndromes such as multiple endocrine neoplasia type 1 (MEN 1) or more rarely in association with pheochromocytoma and PGL (referred to as 3P syndrome). Only a limited number of PAs in association with SDHB-related PGL has been reported and the vast majority occurred subsequently or simultaneously with pheochromocytoma/PGL (collectively abbreviated as PPGL). In this report, we describe a young patient who had a giant pituitary macroprolactinoma resistant to large doses of cabergoline (CBG) and external beam radiotherapy (XRT). The patient did not have personal history of PPGL but was found to carry a germline SDHB pathogenic variant. Case report A 38-year-old woman presented with headache, visual disturbances and galactorrhea and was found to have a 34-mm macroprolactinoma. She was treated with CBG 3-4 mg per week but PA continued to grow and caused significant cranial pressure symptoms. She underwent two transsphenoidal surgeries with rapid tumor recurrence after each one. She received XRT but PA continued to grow. She was finally treated with temozolomide with excellent response. Whole exome and subsequent Sanger sequencing confirmed that she has a pathogenic monoallelic SDHB mutation (NM_003000:c.C343T, p.R115*). PA tissue showed loss of heterozygosity for the same mutation and absent SDHB immunostaining confirming the pathogenic role of this SDHB mutation. Conclusion Germline SDHB mutations can rarely cause PA in the absence of PPGL. They should be considered as a possible cause of aggressiveness and resistance to dopamine agonists in similar cases.
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Affiliation(s)
- Ali S. Alzahrani
- Department of Molecular Oncology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
- Department of Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Abdulghani Bin Nafisah
- Department of Molecular Oncology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
- College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Meshael Alswailem
- Department of Molecular Oncology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Yosra Moria
- Department of Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Dagmara Poprawski
- Oncology Centre, King Faisal Specialist Hospital & Research Centre, Riyadh, Saudi Arabia
- College of Medicine and Public Health, Flinders University, Adelaide, SA, Australia
| | - Hindi Al-Hindi
- Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Karel Pacak
- Section on Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States
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22
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Guha A, Vicha A, Zelinka T, Kana M, Musil Z, Pacak K, Betka J, Chovanec M, Plzak J, Boucek J. High incidence of occult familial SDHD cases amongst Czech patients with head and neck paragangliomas. Front Endocrinol (Lausanne) 2023; 14:1278175. [PMID: 38144572 PMCID: PMC10739302 DOI: 10.3389/fendo.2023.1278175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Accepted: 11/06/2023] [Indexed: 12/26/2023] Open
Abstract
Introduction Head and neck paragangliomas (HNPGLs) are rare neuroendocrine tumors, which are mostly benign in nature. Amongst all genes, Succinate Dehydrogenase Subunit D (SDHD) is the most commonly mutated in familial HNPGLs. In about 30% of HNPGLs, germline mutations in SDHD can also occur in the absence of positive family history, thus giving rise to "occult familial" cases. Our aim was to evaluate the pattern of SDHD germline mutations in Czech patients with HNPGLs. Materials and methods We analyzed a total of 105 patients with HNPGLs from the Otorhinolaryngology departments of 2 tertiary centers between 2006 - 2021. All underwent complex diagnostic work-up and were also consented for genetic analysis. Results Eighty patients aged 13-76 years were included; around 60% with multiple PGLs were males. Carotid body tumor was the most frequently diagnosed tumor. Germline SDHD mutation was found in only 12% of the Czech patients; approximately 78% of those harboring the mutation had negative family history. The mutation traits had higher affiliation for multiple tumors with nearly 70% patients of ≤ 40 years of age. Conclusion An SDHD mutation variant was shared amongst unrelated patients but no founder-effect was established. Our findings confirmed that the pattern of SDHD mutation distribution amongst HNPGLs in Czech Republic differs from most studies worldwide.
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Affiliation(s)
- Anasuya Guha
- Department of Otorhinolaryngology, Charles University, 3 Faculty of Medicine and University Hospital Kralovske Vinohrady, Prague, Czechia
| | - Ales Vicha
- Department of Pediatric Hematology and Oncology, Charles University, 2 Faculty of Medicine and University Hospital Motol, Prague, Czechia
| | - Tomas Zelinka
- 3 Department of Medicine, Department of Endocrinology and Metabolsim of the 1 Faculty of Medicine and General University Hospital in Prague, Prague, Czechia
| | - Martin Kana
- Department of Otorhinolaryngology and Head and Neck Surgery, Charles University, 1 Faculty of Medicine and University Hospital Motol, Prague, Czechia
| | - Zdenek Musil
- Institute of Biology and Medical Genetics of the 1 Faculty of Medicine and General University Hospital in Prague, Prague, Czechia
| | - Karel Pacak
- Section of Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, United States
| | - Jan Betka
- Department of Otorhinolaryngology and Head and Neck Surgery, Charles University, 1 Faculty of Medicine and University Hospital Motol, Prague, Czechia
| | - Martin Chovanec
- Department of Otorhinolaryngology, Charles University, 3 Faculty of Medicine and University Hospital Kralovske Vinohrady, Prague, Czechia
| | - Jan Plzak
- Department of Otorhinolaryngology and Head and Neck Surgery, Charles University, 1 Faculty of Medicine and University Hospital Motol, Prague, Czechia
| | - Jan Boucek
- Department of Otorhinolaryngology and Head and Neck Surgery, Charles University, 1 Faculty of Medicine and University Hospital Motol, Prague, Czechia
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23
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Edmonds S, Davidson J, Joseph R, Vyas M. Imaging Pathway of a Pediatric Patient with Succinate Dehydrogenase B-Deficient Paraganglioma. J Nucl Med Technol 2023; 51:318-322. [PMID: 37699643 DOI: 10.2967/jnmt.123.265655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 08/01/2023] [Indexed: 09/14/2023] Open
Abstract
Pheochromocytoma and paraganglioma are rare in children, at only 1 in every 50,000 cases. Even though some cases are sporadic, they have been connected to syndromes such as von Hippel-Lindau, multiple endocrine neoplasia types IIa and IIb, neurofibromatosis type 1, and hereditary pheochromocytoma-paraganglioma syndromes. A genetic mutation causes around 60% of pheochromocytomas and paragangliomas in children under 18. Methods: A 15-y-old child with a 6-y history of back discomfort is presented. The justification for using 2 functional imaging modalities, 68Ga-DOTATATE PET/CT and 123I-meta-iodobenzylguanidine SPECT/CT, is examined in this case study. We reviewed the patients' journey since the first referral for imaging. Results: Delaying the molecular imaging modalities has affected patients' overall diagnosis and applied treatment outcomes. Conclusion: This case study investigates the potential for the earlier use of various diagnostic modalities in conjunction with diagnostic testing to facilitate an earlier diagnosis. However, since this study is based solely on imaging and lacks access to the patient's clinical or family history, factors such as potential inequities in health-care facilities, health literacy, and socioeconomic status are not addressed. It is essential to acknowledge these influences as they contribute to the inequitable access to health-care settings in New Zealand.
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Affiliation(s)
| | - Jennifer Davidson
- Mercy Radiology, Auckland, New Zealand
- Auckland Hospital, Auckland, New Zealand; and
| | | | - Madhusudan Vyas
- Mercy Radiology, Auckland, New Zealand;
- Unitec Institute of Technology, Auckland, New Zealand
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24
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Shi J, Sun K, Kong F, Shen D. Morphological, immunohistochemical, and genetic analyses of epithelioid gastrointestinal stromal tumors. Ann Diagn Pathol 2023; 67:152208. [PMID: 37696133 DOI: 10.1016/j.anndiagpath.2023.152208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 08/30/2023] [Accepted: 09/01/2023] [Indexed: 09/13/2023]
Abstract
Epithelioid gastrointestinal stromal tumors (GISTs) are rare and may be confused with other tumors with epithelioid morphology. Therefore, herein, we collected 12 epithelioid GIST samples and summarized their morphological and immunohistochemical characteristics. Through genetic testing, we explored the correlation between morphology and gene mutations. The results showed that eight tumors showed focal or diffuse myxoid stromal changes with less cohesively arranged rhabdoid tumor cells; among these, five showed platelet-derived growth factor receptor alpha gene (PDGFRA) mutations. Signet ring cells with sclerosing stroma and receptor tyrosine kinase type III gene (KIT) mutations were present in two cases, which might be a KIT mutation-associated growth pattern in epithelioid GISTs. Succinate dehydrogenase gene (SDH) mutations were detected in three cases. Simultaneously, PDGFRA mutations were detected in two cases, and the Kirsten rat sarcoma viral oncogene homolog gene (KRAS) mutation was detected in another case. SDH-subunit B (SDHB) expression was partially weak and strongly diffuse in two cases with concurrent PDGFRA and SDHD mutations, respectively. The coexistence of PDGFRA and SDHD mutations may have affected SDHB expression. Altogether, we concluded that PDGFRA mutations may play an important role in co-mutant GIST pathogenesis.
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Affiliation(s)
- Jingli Shi
- Department of Pathology, Peking University People's Hospital, 100044, China
| | - Kunkun Sun
- Department of Pathology, Peking University People's Hospital, 100044, China
| | - Fangzhou Kong
- Department of Pathology, Peking University People's Hospital, 100044, China
| | - Danhua Shen
- Department of Pathology, Peking University People's Hospital, 100044, China.
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25
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Silva MF, Douglas K, Sandalli S, Maclean AE, Sheiner L. Functional and biochemical characterization of the Toxoplasma gondii succinate dehydrogenase complex. PLoS Pathog 2023; 19:e1011867. [PMID: 38079448 PMCID: PMC10735183 DOI: 10.1371/journal.ppat.1011867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 12/21/2023] [Accepted: 11/27/2023] [Indexed: 12/23/2023] Open
Abstract
The mitochondrial electron transport chain (mETC) is a series of membrane embedded enzymatic complexes critical for energy conversion and mitochondrial metabolism. In commonly studied eukaryotes, including humans and animals, complex II, also known as succinate dehydrogenase (SDH), is an essential four-subunit enzyme that acts as an entry point to the mETC, by harvesting electrons from the TCA cycle. Apicomplexa are pathogenic parasites with significant impact on human and animal health. The phylum includes Toxoplasma gondii which can cause fatal infections in immunocompromised people. Most apicomplexans, including Toxoplasma, rely on their mETC for survival, yet SDH remains largely understudied. Previous studies pointed to a divergent apicomplexan SDH with nine subunits proposed for the Toxoplasma complex, compared to four in humans. While two of the nine are homologs of the well-studied SDHA and B, the other seven have no homologs in SDHs of other systems. Moreover, SDHC and D, that anchor SDH to the membrane and participate in substrate bindings, have no homologs in Apicomplexa. Here, we validated five of the seven proposed subunits as bona fide SDH components and demonstrated their importance for SDH assembly and activity. We further find that all five subunits are important for parasite growth, and that disruption of SDH impairs mitochondrial respiration and results in spontaneous initiation of differentiation into bradyzoites. Finally, we provide evidence that the five subunits are membrane bound, consistent with their potential role in membrane anchoring, and we demonstrate that a DY motif in one of them, SDH10, is essential for complex formation and function. Our study confirms the divergent composition of Toxoplasma SDH compared to human, and starts exploring the role of the lineage-specific subunits in SDH function, paving the way for future mechanistic studies.
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Affiliation(s)
- Mariana F. Silva
- Wellcome Centre for Integrative Parasitology, University of Glasgow, Glasgow, United Kingdom
| | - Kiera Douglas
- Wellcome Centre for Integrative Parasitology, University of Glasgow, Glasgow, United Kingdom
| | - Sofia Sandalli
- Wellcome Centre for Integrative Parasitology, University of Glasgow, Glasgow, United Kingdom
| | - Andrew E. Maclean
- Wellcome Centre for Integrative Parasitology, University of Glasgow, Glasgow, United Kingdom
| | - Lilach Sheiner
- Wellcome Centre for Integrative Parasitology, University of Glasgow, Glasgow, United Kingdom
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Deng Y, Wang T, Zhao P, Du Y, Zhang L, Qi Z, Ji M. Sensitivity to 12 Fungicides and Resistance Mechanism to Trifloxystrobin, Carbendazim, and Succinate Dehydrogenase Inhibitors in Cucumber Corynespora Leaf Spot ( Corynespora cassiicola). Plant Dis 2023; 107:3783-3791. [PMID: 37189041 DOI: 10.1094/pdis-04-23-0615-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Corynespora cassiicola is the causal agent of cucumber Corynespora leaf spot, which affects many economically important plant species. Chemical control of this disease is hampered by the common development of fungicide resistance. In this study, 100 isolates from Liaoning Province were collected, and their sensitivity to 12 fungicides was determined. All the isolates (100%) were resistant to trifloxystrobin and carbendazim, and 98% were resistant to fluopyram, boscalid, pydiflumetofen, isopyrazam, and fluxapyroxad. However, none were resistant to propiconazole, prochloraz, tebuconazole, difenoconazole, and fludioxonil. The Cytb gene of trifloxystrobin-resistant isolates encoded the G143A mutation, whereas the β-tubulin gene of carbendazim-resistant isolates encoded the E198A and E198A and M163I mutations. Mutations in SdhB-I280V, SdhC-S73P, SdhC-H134R, SdhD-D95E, and SdhD-G109V were associated with resistance to the succinate dehydrogenase inhibitors (SDHIs). Trifloxystrobin, carbendazim, and fluopyram were barely effective on the resistant isolates, whereas fludioxonil and prochloraz were effective on the isolates that were resistant to the quinone outside inhibitors (QoIs), SDHIs, and benzimidazoles. Ultimately, this study demonstrates that fungicide resistance seriously threatens the effective control of Corynespora leaf spot.
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Affiliation(s)
- Yunyan Deng
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Tao Wang
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Ping Zhao
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
- State Key Laboratory of the Discovery and Development of Novel Pesticide, Shenyang Sinochem Agrochemicals R&D Co., Ltd., Shenyang 110021, China
| | - Ying Du
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - LuLu Zhang
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Zhiqui Qi
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
| | - Mingshan Ji
- College of Plant Protection, Shenyang Agricultural University, Shenyang 110866, China
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27
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Qiu Y, Meng Y, Lian W, Jian S, Du Y, Wang M, Yang Y, Liang X, Zhang Y. Polymorphisms at amino acid positions 85 and 86 in succinate dehydrogenase subunit C of Colletotrichum siamense: Implications for fitness and intrinsic sensitivity to SDHI fungicides. Fungal Genet Biol 2023; 169:103844. [PMID: 37989450 DOI: 10.1016/j.fgb.2023.103844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 11/23/2023]
Abstract
Among succinate dehydrogenase inhibiter (SDHI) fungicides, penthiopyrad and benzovindiflupyr particularly inhibit Colletotrichum. Studying SDH amino acid polymorphism in Colletotrichum, along with its fungicide binding sites, is key to understanding their mechanisms of action. This study explores the SDH amino acid polymorphisms in Colletotrichum siamense strains from rubber trees in China and their interaction with SDHI fungicides, specifically penthiopyrad and benzovindiflupyr. Sequencing revealed most polymorphisms were in the SDHC subunit, particularly at positions 85 and 86, which are key to penthiopyrad resistance. Among 33 isolates, 33.3 % exhibited a substitution at position 85, and 9 % at position 86. A strain with W85L and T86N substitutions in SDHC showed reduced SDH activity, ATP content, mycelial growth, and virulence, and decreased sensitivity to penthiopyrad but not benzovindiflupyr. Molecular docking with Alphafold2 modeling suggested distinct binding modes of the two fungicides to C. siamense SDH. These findings underscore the importance of SDHC polymorphisms in C. siamense's fitness and sensitivity to SDHIs, enhancing our understanding of pathogen-SDHI interactions and aiding the development of novel SDHI fungicides.
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Affiliation(s)
- Yurong Qiu
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Yaling Meng
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Wenxu Lian
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Shasha Jian
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Yannan Du
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Meng Wang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Ye Yang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China
| | - Xiaoyu Liang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China.
| | - Yu Zhang
- Sanya Institute of Breeding and Multiplication, School of Tropical Agriculture and Forestry, Hainan University, Sanya, China.
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Marumo T, Maduka CV, Ural E, Apu EH, Chung SJ, Tanabe K, van den Berg NS, Zhou Q, Martin BA, Miura T, Rosenthal EL, Shibahara T, Contag CH. Flavinated SDHA underlies the change in intrinsic optical properties of oral cancers. Commun Biol 2023; 6:1134. [PMID: 37945749 PMCID: PMC10636189 DOI: 10.1038/s42003-023-05510-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 10/26/2023] [Indexed: 11/12/2023] Open
Abstract
The molecular basis of reduced autofluorescence in oral squamous cell carcinoma (OSCC) cells relative to normal cells has been speculated to be due to lower levels of free flavin adenine dinucleotide (FAD). This speculation, along with differences in the intrinsic optical properties of extracellular collagen, lies at the foundation of the design of currently-used clinical optical detection devices. Here, we report that free FAD levels may not account for differences in autofluorescence of OSCC cells, but that the differences relate to FAD as a co-factor for flavination. Autofluorescence from a 70 kDa flavoprotein, succinate dehydrogenase A (SDHA), was found to be responsible for changes in optical properties within the FAD spectral region, with lower levels of flavinated SDHA in OSCC cells. Since flavinated SDHA is required for functional complexation with succinate dehydrogenase B (SDHB), decreased SDHB levels were observed in human OSCC tissue relative to normal tissues. Accordingly, the metabolism of OSCC cells was found to be significantly altered relative to normal cells, revealing vulnerabilities for both diagnosis and targeted therapy. Optimizing non-invasive tools based on optical and metabolic signatures of cancers will enable more precise and early diagnosis leading to improved outcomes in patients.
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Affiliation(s)
- Tomoko Marumo
- Department of Oral and Maxillofacial Surgery, Tokyo Dental College, 2-9-18 Kanda-Misakicho, Chiyoda-ku, Tokyo, 101-0061, Japan
- Department of Biomedical Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Institute for Quantitative Health Science & Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Chima V Maduka
- Department of Biomedical Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Institute for Quantitative Health Science & Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Comparative Medicine & Integrative Biology, Michigan State University, East Lansing, MI, 48824, USA
- BioFrontiers Institute, University of Colorado, Boulder, CO, 80303, USA
| | - Evran Ural
- Department of Biomedical Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Institute for Quantitative Health Science & Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Ehsanul Hoque Apu
- Department of Biomedical Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Institute for Quantitative Health Science & Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Division of Hematology and Oncology, Department of Internal Medicine, Michigan Medicine, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Seock-Jin Chung
- Department of Biomedical Engineering, Michigan State University, East Lansing, MI, 48824, USA
- Institute for Quantitative Health Science & Engineering, Michigan State University, East Lansing, MI, 48824, USA
| | - Koji Tanabe
- Department of Biomedical Engineering, Iwate Medical University, 1-1-1 Idaidori, Yahaba-cho, Shiwa-gun, Iwate, 028-3694, Japan
| | - Nynke S van den Berg
- Department of Otolaryngology - Division of Head and Neck Surgery, Stanford University School of Medicine, 269 Campus Drive, Stanford, CA, 94305, USA
| | - Quan Zhou
- Department of Otolaryngology - Division of Head and Neck Surgery, Stanford University School of Medicine, 269 Campus Drive, Stanford, CA, 94305, USA
| | - Brock A Martin
- Department of Pathology, Stanford University School of Medicine, 3100 Pasteur Drive, Stanford, CA, 94305, USA
| | - Tadashi Miura
- Oral Health Science Center, Tokyo Dental College, 2-1-14 Kanda-Misakicho, Chiyoda-ku, Tokyo, 101-0061, Japan
| | - Eben L Rosenthal
- Department of Otolaryngology - Division of Head and Neck Surgery, Stanford University School of Medicine, 269 Campus Drive, Stanford, CA, 94305, USA
- Department of Otolaryngology - Head and Neck Surgery, Vanderbilt University Medical Center, 1211 Medical Center Dr, Nashville, TN, 37232, USA
| | - Takahiko Shibahara
- Department of Oral and Maxillofacial Surgery, Tokyo Dental College, 2-9-18 Kanda-Misakicho, Chiyoda-ku, Tokyo, 101-0061, Japan
| | - Christopher H Contag
- Department of Biomedical Engineering, Michigan State University, East Lansing, MI, 48824, USA.
- Institute for Quantitative Health Science & Engineering, Michigan State University, East Lansing, MI, 48824, USA.
- Department of Microbiology & Molecular Genetics, Michigan State University, East Lansing, MI, 48824, USA.
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Fischer A, Kloos S, Remde H, Dischinger U, Pamporaki C, Timmers HJLM, Robledo M, Fliedner SMJ, Wang K, Maurer J, Reul A, Bechmann N, Hantel C, Mohr H, Pellegata NS, Bornstein SR, Kroiss M, Auernhammer CJ, Reincke M, Pacak K, Grossman AB, Beuschlein F, Nölting S. Responses to systemic therapy in metastatic pheochromocytoma/paraganglioma: a retrospective multicenter cohort study. Eur J Endocrinol 2023; 189:546-565. [PMID: 37949483 DOI: 10.1093/ejendo/lvad146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Revised: 09/02/2023] [Accepted: 09/19/2023] [Indexed: 11/12/2023]
Abstract
OBJECTIVE The therapeutic options for metastatic pheochromocytomas/paragangliomas (mPPGLs) include chemotherapy with cyclophosphamide/vincristine/dacarbazine (CVD), temozolomide monotherapy, radionuclide therapies, and tyrosine kinase inhibitors such as sunitinib. The objective of this multicenter retrospective study was to evaluate and compare the responses of mPPGLs including those with pathogenic variants in succinate dehydrogenase subunit B (SDHB), to different systemic treatments. DESIGN This is a retrospective analysis of treatment responses of mPPGL patients (n = 74) to systemic therapies. METHODS Patients with mPPGLs treated at 6 specialized national centers were selected based on participation in the ENSAT registry. Survival until detected progression (SDP) and disease-control rates (DCRs) at 3 months were evaluated based on imaging reports. RESULTS For the group of patients with progressive disease at baseline (83.8% of 74 patients), the DCR with first-line CVD chemotherapy was 75.0% (n = 4, SDP 11 months; SDHB [n = 1]: DCR 100%, SDP 30 months), with somatostatin peptide receptor-based radionuclide therapy (PPRT) 85.7% (n = 21, SDP 17 months; SDHB [n = 10]: DCR 100%, SDP 14 months), with 131I-meta-iodobenzylguanidine (131I-MIBG) 82.6% (n = 23, SDP 43 months; SDHB [n = 4]: DCR 100%, SDP 24 months), with sunitinib 100% (n = 7, SDP 18 months; SDHB [n = 3]: DCR 100%, SDP 18 months), and with somatostatin analogs 100% (n = 4, SDP not reached). The DCR with temozolomide as second-line therapy was 60.0% (n = 5, SDP 10 months; SDHB [n = 4]: DCR 75%, SDP 10 months). CONCLUSIONS We demonstrate in a real-life clinical setting that all current therapies show reasonable efficacy in preventing disease progression, and this is equally true for patients with germline SDHB mutations.
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Affiliation(s)
- Alessa Fischer
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland
| | - Simon Kloos
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland
| | - Hanna Remde
- Department of Internal Medicine I, Division of Endocrinology and Diabetes, University Hospital, University of Würzburg, Würzburg, Germany
| | - Ulrich Dischinger
- Department of Internal Medicine I, Division of Endocrinology and Diabetes, University Hospital, University of Würzburg, Würzburg, Germany
| | - Christina Pamporaki
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Henri J L M Timmers
- Division of Endocrinology, Department of Internal Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - Mercedes Robledo
- Hereditary Endocrine Cancer Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras, Institute de Salud Carlos III, Madrid, Spain
| | - Stephanie M J Fliedner
- First Department of Medicine, University Medical Center Schleswig-Holstein, Lübeck, Germany
| | - Katharina Wang
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Julian Maurer
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Astrid Reul
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland
| | - Nicole Bechmann
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse, Dresden, Germany
| | - Constanze Hantel
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Hermine Mohr
- Institute for Diabetes and Cancer, Helmholtz Zentrum München, Neuherberg, Germany
| | - Natalia S Pellegata
- Institute for Diabetes and Cancer, Helmholtz Zentrum München, Neuherberg, Germany
- Department of Biology and Biotechnology, University of Pavia, Pavia, Italy
| | - Stefan R Bornstein
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany
| | - Matthias Kroiss
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Christoph J Auernhammer
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Martin Reincke
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Karel Pacak
- Eunice Kennedy Shriver NICHD, NIH, Bethesda, MD, United States
| | - Ashley B Grossman
- Green Templeton College, University of Oxford, Oxford, United Kingdom
- NET Unit, ENETS Center of Excellence, Royal Free Hospital, London, United Kingdom
| | - Felix Beuschlein
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
| | - Svenja Nölting
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ) and University of Zurich (UZH), Zurich, Switzerland
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, Munich, Germany
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30
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Liu C, Zhou D, Yang K, Xu N, Peng J, Zhu Z. Research progress on the pathogenesis of the SDHB mutation and related diseases. Biomed Pharmacother 2023; 167:115500. [PMID: 37734265 DOI: 10.1016/j.biopha.2023.115500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 09/01/2023] [Accepted: 09/12/2023] [Indexed: 09/23/2023] Open
Abstract
With the improvement of genetic testing technology in diseases in recent years, researchers have a more detailed and clear understanding of the source of cancers. Succinate dehydrogenase B (SDHB), a mitochondrial gene, is related to the metabolic activities of cells and tissues throughout the body. The mutations of SDHB have been found in pheochromocytoma, paraganglioma and other cancers, and is proved to affect the occurrence and progress of those cancers due to the important structural functions. The importance of SDHB is attracting more and more attention of researchers, however, reviews on the structure and function of SDHB, as well as on the mechanism of its carcinogenesis is inadequate. This paper reviews the relationship between SDHB mutations and related cancers, discusses the molecular mechanism of SDHB mutations that may lead to tumor formation, analyzes the mutation spectrum, structural domains, and penetrance of SDHB and sorts out some of the previously discovered diseases. For the patients with SDHB mutation, it is recommended that people in SDHB mutation families undergo regular genetic testing or SDHB immunohistochemistry (IHC). The purpose of this paper is hopefully to provide some reference and help for follow-up researches on SDHB.
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Affiliation(s)
- Chang Liu
- Ambulatory Surgical Center, First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Kunming 650032, China
| | - Dayang Zhou
- Ambulatory Surgical Center, First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Kunming 650032, China
| | - Kexin Yang
- Department of Surgical oncology, Yunnan Cancer Hospital, 519 Kunzhou Road, Kunming, 650118, China
| | - Ning Xu
- Ambulatory Surgical Center, First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Kunming 650032, China
| | - Jibang Peng
- Department of Surgical oncology, First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Kunming 650032, China
| | - Zhu Zhu
- Ambulatory Surgical Center, First Affiliated Hospital of Kunming Medical University, 295 Xichang Road, Kunming 650032, China.
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Li W, Quan L, Peng K, Wang Y, Wang X, Chen Q, Cheng H, Ma Q. Succinate dehydrogenase is essential for epigenetic and metabolic homeostasis in hearts. Basic Res Cardiol 2023; 118:45. [PMID: 37819607 DOI: 10.1007/s00395-023-01015-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 09/26/2023] [Accepted: 09/28/2023] [Indexed: 10/13/2023]
Abstract
A hallmark of heart failure is a metabolic switch away from fatty acids β-oxidation (FAO) to glycolysis. Here, we show that succinate dehydrogenase (SDH) is required for maintenance of myocardial homeostasis of FAO/glycolysis. Mice with cardiomyocyte-restricted deletion of subunit b or c of SDH developed a dilated cardiomyopathy and heart failure. Hypertrophied hearts displayed a decrease in FAO, while glucose uptake and glycolysis were augmented, which was reversed by enforcing FAO fuels via a high-fat diet, which also improved heart failure of mutant mice. SDH-deficient hearts exhibited an increase in genome-wide DNA methylation associated with accumulation of succinate, a metabolite known to inhibit DNA demethylases, resulting in changes of myocardial transcriptomic landscape. Succinate induced DNA hypermethylation and depressed the expression of FAO genes in myocardium, leading to imbalanced FAO/glycolysis. Inhibition of succinate by α-ketoglutarate restored transcriptional profiles and metabolic disorders in SDH-deficient cardiomyocytes. Thus, our findings reveal the essential role for SDH in metabolic remodeling of failing hearts, and highlight the potential of therapeutic strategies to prevent cardiac dysfunction in the setting of SDH deficiency.
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Affiliation(s)
- Wenwen Li
- Innovation Center for Neurological Disorders and Department of Neurology, Xuanwu Hospital, Capital Medical University, National Clinical Research Center for Geriatric Diseases, Beijing, China
| | - Li Quan
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China
| | - Kun Peng
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China
| | - Yanru Wang
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China
| | - Xianhua Wang
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China
- Research Unit of Mitochondria in Brain Diseases, Chinese Academy of Medical Sciences, PKU-Nanjing Institute of Translational Medicine, Nanjing, China
| | - Quan Chen
- College of Life Sciences, Nankai University, Tianjin, China
| | - Heping Cheng
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China
- Research Unit of Mitochondria in Brain Diseases, Chinese Academy of Medical Sciences, PKU-Nanjing Institute of Translational Medicine, Nanjing, China
| | - Qi Ma
- State Key Laboratory of Membrane Biology, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking-Tsinghua Center for Life Sciences, Institute of Molecular Medicine, College of Future Technology, Peking University, Beijing, 100871, China.
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32
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Pearce TL, Scott JB, Wilson CR, Gent DH. Evolution of the Genetic Structure of the Didymella tanaceti Population During Development of Succinate Dehydrogenase Inhibitor Resistance. Phytopathology 2023; 113:1946-1958. [PMID: 37129263 DOI: 10.1094/phyto-10-22-0385-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Emergence of pathogens with decreased sensitivity to succinate dehydrogenase inhibitor fungicides is a global agronomical issue. Analysis of Didymella tanaceti isolates (n = 173), which cause tan spot of pyrethrum (Tanacetum cinerariifolium), collected prior to (2004 to 2005) and after (2009, 2010, 2012, and 2014) the commercial implementation of boscalid in Tasmanian pyrethrum fields identified that insensitivity developed over time and has become widespread. To evaluate temporal change, isolates were characterized for frequency of mutations in the succinate dehydrogenase (Sdh) B, C, and D subunits associated with boscalid resistance, mating type, and SSR genotype. All isolates from 2004 and 2005 exhibited wild-type (WT) Sdh alleles. Seven known Sdh substitutions were identified in isolates collected from 2009 to 2014. In 2009, 60.7% had Sdh substitutions associated with boscalid resistance in D. tanaceti. The frequency of WT isolates decreased over time, with no WT isolates identified in 2014. The frequency of the SdhB-H277Y genotype increased from 10.7 to 77.8% between 2009 and 2014. Genotypic evidence suggested that a shift in the population structure occurred between 2005 and 2009, with decreases in gene diversity (uh; 0.51 to 0.34), genotypic evenness (E5; 0.96 to 0.67), genotypic diversity (G; 9.3 to 6.8), and allele frequencies. No evidence was obtained to support the rapid spread of Sdh genotypes by clonal expansion of the population. Thus, insensitivity to boscalid has developed and become widespread within a diverse population within 4 years of usage. These results suggest that D. tanaceti can disperse insensitivity through repeated frequent mutation, sexual recombination, or a combination of both.
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Affiliation(s)
- Tamieka L Pearce
- Tasmanian Institute of Agriculture, College of Sciences and Engineering, University of Tasmania, Burnie, Tasmania 7320, Australia
| | - Jason B Scott
- Tasmanian Institute of Agriculture, College of Sciences and Engineering, University of Tasmania, Burnie, Tasmania 7320, Australia
| | - Calum R Wilson
- Tasmanian Institute of Agriculture, University of Tasmania, Sandy Bay, Tasmania 7005
| | - David H Gent
- U.S. Department of Agriculture-Agriculture Research Service, Forage Seed and Cereal Research Unit, Corvallis, OR 97331
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Duarte Hospital C, Tête A, Debizet K, Imler J, Tomkiewicz-Raulet C, Blanc EB, Barouki R, Coumoul X, Bortoli S. SDHi fungicides: An example of mitotoxic pesticides targeting the succinate dehydrogenase complex. Environ Int 2023; 180:108219. [PMID: 37778286 DOI: 10.1016/j.envint.2023.108219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 06/15/2023] [Accepted: 09/18/2023] [Indexed: 10/03/2023]
Abstract
Succinate dehydrogenase inhibitors (SDHi) are fungicides used to control the proliferation of pathogenic fungi in crops. Their mode of action is based on blocking the activity of succinate dehydrogenase (SDH), a universal enzyme expressed by all species harboring mitochondria. The SDH is involved in two interconnected metabolic processes for energy production: the transfer of electrons in the mitochondrial respiratory chain and the oxidation of succinate to fumarate in the Krebs cycle. In humans, inherited SDH deficiencies may cause major pathologies including encephalopathies and cancers. The cellular and molecular mechanisms related to such genetic inactivation have been well described in neuroendocrine tumors, in which it induces an oxidative stress, a pseudohypoxic phenotype, a metabolic, epigenetic and transcriptomic remodeling, and alterations in the migration and invasion capacities of cancer cells, in connection with the accumulation of succinate, an oncometabolite, substrate of the SDH. We will discuss recent studies reporting toxic effects of SDHi in non-target organisms and their implications for risk assessment of pesticides. Recent data show that the SDH structure is highly conserved during evolution and that SDHi can inhibit SDH activity in mitochondria of non-target species, including humans. These observations suggest that SDHi are not specific inhibitors of fungal SDH. We hypothesize that SDHi could have toxic effects in other species, including humans. Moreover, the analysis of regulatory assessment reports shows that most SDHi induce tumors in animals without evidence of genotoxicity. Thus, these substances could have a non-genotoxic mechanism of carcinogenicity that still needs to be fully characterized and that could be related to SDH inhibition. The use of pesticides targeting mitochondrial enzymes encoded by tumor suppressor genes raises questions on the risk assessment framework of mitotoxic pesticides. The issue of SDHi fungicides is therefore a textbook case that highlights the urgent need for changes in regulatory assessment.
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Affiliation(s)
| | - Arnaud Tête
- Université Paris Cité, INSERM UMR-S 1124, T3S, 45 rue des Saints-Pères, 75006 Paris
| | - Kloé Debizet
- Université Paris Cité, INSERM UMR-S 1124, T3S, 45 rue des Saints-Pères, 75006 Paris
| | - Jules Imler
- Université Paris Cité, INSERM UMR-S 1124, T3S, 45 rue des Saints-Pères, 75006 Paris
| | | | - Etienne B Blanc
- Université Paris Cité, INSERM UMR-S 1124, T3S, 45 rue des Saints-Pères, 75006 Paris
| | - Robert Barouki
- Université Paris Cité, INSERM UMR-S 1124, T3S, 45 rue des Saints-Pères, 75006 Paris
| | - Xavier Coumoul
- Université Paris Cité, INSERM UMR-S 1124, T3S, 45 rue des Saints-Pères, 75006 Paris.
| | - Sylvie Bortoli
- Université Paris Cité, INSERM UMR-S 1124, T3S, 45 rue des Saints-Pères, 75006 Paris.
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Tooker EL, Wiggins RH, Espahbodi M, Naumer A, Buchmann LO, Greenberg SE, Patel NS. The Natural History of Observed SDHx -Related Head and Neck Paragangliomas Using Three-Dimensional Volumetric Tumor Analysis. Otol Neurotol 2023; 44:931-940. [PMID: 37590887 DOI: 10.1097/mao.0000000000003989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
OBJECTIVE Characterize the natural history and clinical behavior of head and neck paragangliomas (HNPGLs) in subjects with succinate dehydrogenase ( SDHx ) pathogenic variants using volumetric tumor measurements. STUDY DESIGN Cohort study. SETTING Tertiary academic referral center. PATIENTS Subjects with SDHx HNPGLs under observation for at least 6 months with 2 or more magnetic resonance imaging or computed tomography scans. INTERVENTIONS Diagnostic interventions include next-generation sequencing, magnetic resonance imaging, and computed tomography. Therapeutic interventions include microsurgical resection or stereotactic radiosurgery. MAIN OUTCOME MEASURES Radiographic progression was defined as a 20% or greater increase in volume. Cranial nerve (CN) functional outcomes were assessed using clinical documentation. RESULTS A total of 19 subjects with 32 tumors met the inclusion criteria. Median radiographic follow-up was 2.2 years, and the median volumetric growth rate was 0.47 cm 3 /yr. Kaplan-Meier estimated rates of survival free of radiographic progression for all SDHx tumors at 1, 2, and 3 years were 69, 50, and 22%, respectively. No tumors developed new CN palsies during the period of observation. CONCLUSIONS Over intermediate-term follow-up, observation of treatment-naive SDHx -related HNPGLs did not result in new cranial neuropathy. Although indefinite observation is only appropriate for select cases, these data support an interval of observation to characterize growth rate in asymptomatic to minimally symptomatic patients, who are at high risk of treatment-related morbidity. Given the early age at diagnosis and high risk of bilateral multifocal phenotypes in SDHx HNPGL mutation carriers, these data may aid in optimizing patient tumor control and CN functional preservation. Further studies are necessary to determine whether pretreatment growth rate is correlated with clinical outcomes.
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Affiliation(s)
| | | | | | - Anne Naumer
- Huntsman Cancer Institute, University of Utah Health, Salt Lake City, Utah
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Kodare D, Menon S, Prakash G, Desai S. Succinate dehydrogenase deficient renal cell carcinoma: A case report of an uncommon renal cancer. Indian J Cancer 2023; 60:583-585. [PMID: 38189645 DOI: 10.4103/ijc.ijc_801_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 12/16/2021] [Indexed: 01/09/2024]
Abstract
Succinate dehydrogenase-deficient renal cell carcinoma (SDH-deficient RCC) is a rare type of renal cancer with distinct morphological features and diagnostic immunohistochemistry characterized by the absence of SDH immunostaining. The pathologists and the clinician need to be aware of this entity in view of their indolent course in most cases. We present here the first case from India of SDHB-deficient RCC.
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Affiliation(s)
- Duhita Kodare
- Department of Pathology, Tata Memorial Hospital Mumbai, Maharashtra, India
| | - Santosh Menon
- Department of Pathology, Tata Memorial Hospital Mumbai, Maharashtra, India
| | - Gagan Prakash
- Department of Uro-Oncology, Tata Memorial Hospital Mumbai, Maharashtra, India
| | - Sangeeta Desai
- Department of Pathology, Tata Memorial Hospital Mumbai, Maharashtra, India
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Amore F, Garella R, Santi A, Guasti D, Martinelli S, Canu L, Bani D, Neuzil J, Maggi M, Squecco R, Rapizzi E. The aggressiveness of succinate dehydrogenase subunit B-deficient chromaffin cells is reduced when their bioelectrical properties are restored by glibenclamide. Endocr Relat Cancer 2023; 30:e230167. [PMID: 37493200 DOI: 10.1530/erc-23-0167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 07/25/2023] [Indexed: 07/27/2023]
Abstract
Pheochromocytomas/paragangliomas (PPGLs) are neuroendocrine tumours, mostly resulting from mutations in predisposing genes. Mutations of succinate dehydrogenase (SDH) subunit B (SDHB) are associated with high probability of metastatic disease. Since bioelectrical properties and signalling in cancer are an emerging field, we investigated the metabolic, functional and electrophysiological characteristics in human succinate dehydrogenase subunit B (SDHB)-deficient pheochromocytoma cells. These cells exhibited reduced SDH function with elevated succinate-to-fumarate ratio and reduced intracellular ATP levels. The analysis of membrane passive properties revealed a more hyperpolarized membrane potential and a lower cell capacitance of SDHB-deficient cells compared to the parental ones. These bioelectrical changes were associated with reduced proliferation and adhesion capacity of SDHB-deficient cells. Only in SDHB-deficient cells, we also observed an increased amplitude of potassium currents suggesting an activation of ATP-sensitive potassium channels (KATP). Indeed, exposure of the SDHB-deficient cells to glibenclamide, a specific KATP inhibitor, or to ATP caused normalization of potassium current features and altered proliferation and adhesion. In this work, we show for the first time that reduced intracellular ATP levels in SDHB-deficient chromaffin cells impaired cell bioelectrical properties, which, in turn, are associated with an increased cell aggressiveness. Moreover, we first ever demonstrated that glibenclamide not only reduced the outward potassium currents in SDHB-deficient cells but increased their growth capacity, reduced their ability to migrate and shifted their phenotype towards one more similar to that of parental one.
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Affiliation(s)
- Francesca Amore
- Department Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | - Rachele Garella
- Department Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Alice Santi
- Department Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | - Daniele Guasti
- Department of Experimental and Clinical Medicine, Imaging Platform, University of Florence, Italy
| | - Serena Martinelli
- Department Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
- Centro di Ricerca e Innovazione sulle Patologie Surrenaliche, AOU Careggi, Florence, Italy
- ENS@T Center of Excellence, Florence, Italy
| | - Letizia Canu
- Department Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
- Centro di Ricerca e Innovazione sulle Patologie Surrenaliche, AOU Careggi, Florence, Italy
- ENS@T Center of Excellence, Florence, Italy
| | - Daniele Bani
- Department of Experimental and Clinical Medicine, Imaging Platform, University of Florence, Italy
| | - Jiri Neuzil
- Institute of Biotechnology, Czech Academy of Sciences, Prague-West, Czech Republic
- School of Pharmacy and Medical Science, Griffith University, Southport, Queensland, Australia
- Faculty of Science and 1st Medical Faculty, Charles University, Prague, Czech Republic
| | - Mario Maggi
- Department Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
- Centro di Ricerca e Innovazione sulle Patologie Surrenaliche, AOU Careggi, Florence, Italy
- ENS@T Center of Excellence, Florence, Italy
| | - Roberta Squecco
- Department Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Elena Rapizzi
- Department Experimental and Clinical Medicine, University of Florence, Florence, Italy
- Centro di Ricerca e Innovazione sulle Patologie Surrenaliche, AOU Careggi, Florence, Italy
- ENS@T Center of Excellence, Florence, Italy
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Cao K, Xu J, Cao W, Wang X, Lv W, Zeng M, Zou X, Liu J, Feng Z. Assembly of mitochondrial succinate dehydrogenase in human health and disease. Free Radic Biol Med 2023; 207:247-259. [PMID: 37490987 DOI: 10.1016/j.freeradbiomed.2023.07.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 07/18/2023] [Accepted: 07/19/2023] [Indexed: 07/27/2023]
Abstract
Mitochondrial succinate dehydrogenase (SDH), also known as electron transport chain (ETC) Complex II, is the only enzyme complex engaged in both oxidative phosphorylation and the tricarboxylic acid (TCA) cycle. SDH has received increasing attention due to its crucial role in regulating mitochondrial metabolism and human health. Despite having the fewest subunits among the four ETC complexes, functional SDH is formed via a sequential and well-coordinated assembly of subunits. Along with the discovery of subunit-specific assembly factors, the dynamic involvement of the SDH assembly process in a broad range of diseases has been revealed. Recently, we reported that perturbation of SDH assembly in different tissues leads to interesting and distinct pathophysiological changes in mice, indicating a need to understand the intricate SDH assembly process in human health and diseases. Thus, in this review, we summarize recent findings on SDH pathogenesis with respect to disease and a focus on SDH assembly.
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Affiliation(s)
- Ke Cao
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China; Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China
| | - Jie Xu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China
| | - Wenli Cao
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China
| | - Xueqiang Wang
- School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao, Shandong, 266071, China
| | - Weiqiang Lv
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China
| | - Mengqi Zeng
- School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao, Shandong, 266071, China
| | - Xuan Zou
- National & Local Joint Engineering Research Center of Biodiagnosis and Biotherapy, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, 710004, China
| | - Jiankang Liu
- Center for Mitochondrial Biology and Medicine, The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, Shaanxi, China; School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao, Shandong, 266071, China.
| | - Zhihui Feng
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, China; School of Health and Life Sciences, University of Health and Rehabilitation Sciences, Qingdao, Shandong, 266071, China.
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Shand JAD, van Schalkwyk J, Beavis V, Niyagama A, Taylor S, Eagleton C. High rates of the SDHB p.Arg46Gln pathogenic variant predisposes New Zealand Māori to phaeochromocytoma/paraganglioma. Intern Med J 2023; 53:1883-1889. [PMID: 36346292 DOI: 10.1111/imj.15965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/24/2022] [Indexed: 11/09/2022]
Abstract
BACKGROUND Phaeochromocytomas (PCC) and paragangliomas (PGL; together PPGL) are rare tumours of the adrenal medulla or extra-adrenal paraganglia. They may secrete catecholamines with significant cardiovascular effects. Management of PPGL is predominantly surgical, despite the anaesthetic risks related to potential haemodynamic instability. Meticulous pre-treatment and intra-operative management are required to improve cardiovascular outcomes. AIMS There are limited local data regarding the incidence of PPGL and the clinical characteristics of individuals diagnosed with these tumours in New Zealand. We undertook a retrospective study investigating the local practice and patient characteristics with an additional focus on intra-operative haemodynamic stability and post-operative outcomes. METHODS Electronic patient records were searched for individuals with a diagnosis of PPGL. Clinical records and electronic databases were interrogated for pre-operative, intra-operative and post-operative data points. Particular attention was paid to rates and types of germline mutations, intra-operative haemodynamic stability and post-operative renal and cardiovascular outcomes. RESULTS We identified 49 individuals with PPGL, of whom 34 were from the local area. This gave a local incidence of PPGL of around five cases per million people per year. Māori were significantly over-represented in our cohort, with this being in part due to high rates of the SDHB R46Q mutation. Over 95% of our cohort met pre-specified pre-operative blood pressure parameters. Intra-operative monitoring revealed a tendency to hypotension, but this did not translate into adverse post-operative outcomes, which were infrequent. CONCLUSIONS Māori were over-represented due to high rates of germline SDHB R46Q mutations. There were few post-operative adverse outcomes in this contemporary cohort.
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Affiliation(s)
- James A D Shand
- Department of Endocrinology, Auckland Hospital, Auckland, New Zealand
| | - Johan van Schalkwyk
- Department of Perioperative Medicine, Auckland Hospital, Auckland, New Zealand
| | - Vanessa Beavis
- Department of Anaesthesia, Auckland Hospital, Auckland, New Zealand
| | - Anjana Niyagama
- Department of General Medicine, Auckland Hospital, Auckland, New Zealand
| | - Saana Taylor
- Department of Anaesthesia, Auckland Hospital, Auckland, New Zealand
| | - Carl Eagleton
- Department of Endocrinology, Auckland Hospital, Auckland, New Zealand
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Fischer A, Kloos S, Maccio U, Friemel J, Remde H, Fassnacht M, Pamporaki C, Eisenhofer G, Timmers HJLM, Robledo M, Fliedner SMJ, Wang K, Maurer J, Reul A, Zitzmann K, Bechmann N, Žygienė G, Richter S, Hantel C, Vetter D, Lehmann K, Mohr H, Pellegata NS, Ullrich M, Pietzsch J, Ziegler CG, Bornstein SR, Kroiss M, Reincke M, Pacak K, Grossman AB, Beuschlein F, Nölting S. Metastatic Pheochromocytoma and Paraganglioma: Somatostatin Receptor 2 Expression, Genetics, and Therapeutic Responses. J Clin Endocrinol Metab 2023; 108:2676-2685. [PMID: 36946182 PMCID: PMC10505550 DOI: 10.1210/clinem/dgad166] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 03/01/2023] [Accepted: 03/17/2023] [Indexed: 03/23/2023]
Abstract
CONTEXT Pheochromocytomas and paragangliomas (PPGLs) with pathogenic mutations in the succinate dehydrogenase subunit B (SDHB) are associated with a high metastatic risk. Somatostatin receptor 2 (SSTR2)-dependent imaging is the most sensitive imaging modality for SDHB-related PPGLs, suggesting that SSTR2 expression is a significant cell surface therapeutic biomarker of such tumors. OBJECTIVE Exploration of the relationship between SSTR2 immunoreactivity and SDHB immunoreactivity, mutational status, and clinical behavior of PPGLs. Evaluation of SSTR-based therapies in metastatic PPGLs. METHODS Retrospective analysis of a multicenter cohort of PPGLs at 6 specialized Endocrine Tumor Centers in Germany, The Netherlands, and Switzerland. Patients with PPGLs participating in the ENSAT registry were included. Clinical data were extracted from medical records, and immunohistochemistry (IHC) for SDHB and SSTR2 was performed in patients with available tumor tissue. Immunoreactivity of SSTR2 was investigated using Volante scores. The main outcome measure was the association of SSTR2 IHC positivity with genetic and clinical-pathological features of PPGLs. RESULTS Of 202 patients with PPGLs, 50% were SSTR2 positive. SSTR2 positivity was significantly associated with SDHB- and SDHx-related PPGLs, with the strongest SSTR2 staining intensity in SDHB-related PPGLs (P = .01). Moreover, SSTR2 expression was significantly associated with metastatic disease independent of SDHB/SDHx mutation status (P < .001). In metastatic PPGLs, the disease control rate with first-line SSTR-based radionuclide therapy was 67% (n = 22, n = 11 SDHx), and with first-line "cold" somatostatin analogs 100% (n = 6, n = 3 SDHx). CONCLUSION SSTR2 expression was independently associated with SDHB/SDHx mutations and metastatic disease. We confirm a high disease control rate of somatostatin receptor-based therapies in metastatic PPGLs.
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Affiliation(s)
- Alessa Fischer
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), and University of Zurich (UZH), CH-8091 Zurich, Switzerland
| | - Simon Kloos
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), and University of Zurich (UZH), CH-8091 Zurich, Switzerland
| | - Umberto Maccio
- Department of Pathology and Molecular Pathology, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Juliane Friemel
- Department of Pathology and Molecular Pathology, University Hospital Zurich, CH-8091 Zurich, Switzerland
| | - Hanna Remde
- Department of Internal Medicine I, Division of Endocrinology and Diabetes, University Hospital, University of Würzburg, 97080 Würzburg, Germany
| | - Martin Fassnacht
- Department of Internal Medicine I, Division of Endocrinology and Diabetes, University Hospital, University of Würzburg, 97080 Würzburg, Germany
| | - Christina Pamporaki
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Graeme Eisenhofer
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Henri J L M Timmers
- Division of Endocrinology, Department of Internal Medicine, Radboud University Medical Center, 6525 GA Nijmegen, Netherlands
| | - Mercedes Robledo
- Hereditary Endocrine Cancer Group, Spanish National Cancer Research Center (CNIO), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras, Madrid, Spain
| | - Stephanie M J Fliedner
- First Department of Medicine, University Medical Center Schleswig-Holstein, 23538 Lübeck, Germany
| | - Katharina Wang
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany
| | - Julian Maurer
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany
| | - Astrid Reul
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), and University of Zurich (UZH), CH-8091 Zurich, Switzerland
| | - Kathrin Zitzmann
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany
| | - Nicole Bechmann
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse, 01307 Dresden, Germany
| | - Gintarė Žygienė
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse, 01307 Dresden, Germany
| | - Susan Richter
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Medical Faculty Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse, 01307 Dresden, Germany
| | - Constanze Hantel
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), and University of Zurich (UZH), CH-8091 Zurich, Switzerland
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Diana Vetter
- Department of Visceral and Transplantation Surgery, University Hospital, 8091 Zürich, Switzerland
| | - Kuno Lehmann
- Department of Visceral and Transplantation Surgery, University Hospital, 8091 Zürich, Switzerland
| | - Hermine Mohr
- Institute for Diabetes and Cancer, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Natalia S Pellegata
- Institute for Diabetes and Cancer, Helmholtz Zentrum München, 85764 Neuherberg, Germany
- Department of Biology and Biotechnology, University of Pavia, 27100 Pavia, Italy
| | - Martin Ullrich
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
| | - Jens Pietzsch
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Dresden, Germany
- Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Dresden, Germany
| | - Christian G Ziegler
- Department of Internal Medicine I, Division of Endocrinology and Diabetes, University Hospital, University of Würzburg, 97080 Würzburg, Germany
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Stefan R Bornstein
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), and University of Zurich (UZH), CH-8091 Zurich, Switzerland
- Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, 01307 Dresden, Germany
| | - Matthias Kroiss
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany
| | - Martin Reincke
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany
| | - Karel Pacak
- Section on Medical Neuroendocrinology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Rockville, MD 20847, USA
| | - Ashley B Grossman
- Green Templeton College, University of Oxford, Oxford, UK
- NET Unit, ENETS Centre of Excellence, Royal Free Hospital, London, UK
| | - Felix Beuschlein
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), and University of Zurich (UZH), CH-8091 Zurich, Switzerland
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany
| | - Svenja Nölting
- Department of Endocrinology, Diabetology and Clinical Nutrition, University Hospital Zurich (USZ), and University of Zurich (UZH), CH-8091 Zurich, Switzerland
- Department of Medicine IV, University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany
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Miller KM, Sbeih F, Contrera K, Reddy CA, Marquard J, Eng C, Lorenz RR. Reduced Risk of Corporal Tumors in Patients With Head and Neck Paragangliomas With p.Pro81Leu Mutations. Otolaryngol Head Neck Surg 2023; 169:570-576. [PMID: 36939592 DOI: 10.1002/ohn.274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/13/2022] [Accepted: 01/05/2023] [Indexed: 02/10/2023]
Abstract
OBJECTIVE Patients with head and neck paragangliomas who are positive for the SDHD p.Pro81Leu (P81L) mutation are thought to have a distinct phenotype from other SDHx mutations, but few studies have focused on this mutation. The objective of this study was to determine the hazard of developing a second primary, metastatic, or recurrent paraganglioma in SDHx patients with or without P81L. STUDY DESIGN Retrospective chart review of 60 patients with head and neck paragangliomas and genetic testing, followed for a median of 9 years. SETTING Single academic medical center. METHODS Univariable Cox proportional hazards regression evaluated second primary and recurrent paragangliomas in patients with SDHD P81L, SDHx non-P81L, and nonhereditary paraganglioma. RESULTS This series comprised 31 patients without SDHx, 14 with SDHD P81L, and 15 with other SDHx mutations. At a median 9 years of follow-up, corporal (not head and neck) second primary paragangliomas occurred in 31% of patients with SDHx non-P81L mutations, compared with 0% and 4% of patients with SDHD P81L and without SDHx mutations, respectively. Second corporal paragangliomas were more likely in patients with SDHx non-P81L mutations than in those without a mutation (hazard ratio = 5.461, 95% confidence interval: 0.596-50.030, p = .13). CONCLUSION This is the first study to report a lower likelihood of corporal tumors for patients with head and neck paragangliomas with SDH mutations positive for P81L. Larger studies are needed to determine if head and neck paraganglioma patients with P81L qualify for less intensive imaging surveillance to screen for second primary paragangliomas outside the head and neck.
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Affiliation(s)
- Katherine M Miller
- Head and Neck Institute, Cleveland Clinic, Head & Neck Institute, Cleveland, Ohio, USA
| | - Firas Sbeih
- Head and Neck Institute, Cleveland Clinic, Head & Neck Institute, Cleveland, Ohio, USA
| | - Kevin Contrera
- Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Chandana A Reddy
- Department of Radiation Oncology, Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Jessica Marquard
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Charis Eng
- Genomic Medicine Institute, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Taussig Cancer Institute, Cleveland Clinic, Cleveland, Ohio, USA
- Department of Genetics and Genome Sciences, Case Western Reserve University School of Medicine, Cleveland, Ohio, USA
- Department of Genetics and Genome Sciences, Germline High Risk Cancer Focus Group, CASE Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Robert R Lorenz
- Head and Neck Institute, Cleveland Clinic, Head & Neck Institute, Cleveland, Ohio, USA
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Hashimoto H, Miura S, Tanaka M, Sakuma J, Fujita Y, Takamatsu M, Noie T, Morikawa T. Gastric succinate dehydrogenase-deficient gastrointestinal stromal tumor presenting as a solitary cystic lesion. Pathol Int 2023; 73:469-472. [PMID: 37503877 DOI: 10.1111/pin.13355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 07/06/2023] [Indexed: 07/29/2023]
Affiliation(s)
- Hirotsugu Hashimoto
- Department of Diagnostic Pathology, NTT Medical Center Tokyo, Tokyo, Japan
- Faculty of Healthcare, Tokyo Healthcare University, Tokyo, Japan
| | - Sakiko Miura
- Department of Diagnostic Pathology, NTT Medical Center Tokyo, Tokyo, Japan
| | - Motomu Tanaka
- Department of Surgery, NTT Medical Center Tokyo, Tokyo, Japan
| | - Jun Sakuma
- Department of Surgery, NTT Medical Center Tokyo, Tokyo, Japan
| | - Yuji Fujita
- Department of Hepato-Biliary-Pancreatic Medicine, NTT Medical Center Tokyo, Tokyo, Japan
| | - Manabu Takamatsu
- Department of Pathology, The Cancer Institute Hospital, Japanese Foundation for Cancer Research, Tokyo, Japan
| | - Tamaki Noie
- Department of Surgery, NTT Medical Center Tokyo, Tokyo, Japan
| | - Teppei Morikawa
- Department of Diagnostic Pathology, NTT Medical Center Tokyo, Tokyo, Japan
- Faculty of Healthcare, Tokyo Healthcare University, Tokyo, Japan
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Gao P, Zeng R, Gao S, Xu L, Song Z, Dai F. Resistance Profiles of Botrytis cinerea to Fluxapyroxad from Strawberry Fields in Shanghai, China. Plant Dis 2023; 107:2724-2728. [PMID: 36825320 DOI: 10.1094/pdis-10-22-2416-re] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Fluxapyroxad, a type of succinate dehydrogenase inhibitor fungicide, has been used to control the growth of gray mold on strawberry for more than 5 years in China. Selection for resistance to the causal agent Botrytis cinerea became a threat to the efficacy of fluxapyroxad. In total, 160 B. cinerea isolates collected from Shanghai during 2020 and 2021 were tested for their resistance to fluxapyroxad using mycelial growth inhibition. The results indicated that the curve of baseline sensitivity was unimodal, with an approximately normal distribution and a mean effective concentration of the fungicide that inhibited growth by 50% (EC50) of 0.18 ± 0.01 μg/ml. In total, 27.78 and 48.57% of isolates were resistant to fluxapyroxad in 2020 and 2021, respectively, where the lowest EC50 value of mycelial growth inhibition was 0.03 μg/ml and the highest value was 51.3 μg/ml. Resistance mechanism analysis showed that the succinate dehydrogenase subunit B (SdhB) N230I mutation could lead to resistance and P225F mutation could lead to higher resistance. These data suggest that the resistance frequency of B. cinerea isolates to fluxapyroxad increased in 2021 compared with 2020, which requires appropriate fungicide rotation strategies to be implemented in order to control gray mold on strawberry in the future.
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Affiliation(s)
- Ping Gao
- Institute of Eco-Environment and Plant Protection, Shanghai Key Laboratory of Protection Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Rong Zeng
- Institute of Eco-Environment and Plant Protection, Shanghai Key Laboratory of Protection Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Shigang Gao
- Institute of Eco-Environment and Plant Protection, Shanghai Key Laboratory of Protection Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Lihui Xu
- Institute of Eco-Environment and Plant Protection, Shanghai Key Laboratory of Protection Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Zhiwei Song
- Institute of Eco-Environment and Plant Protection, Shanghai Key Laboratory of Protection Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Fuming Dai
- Institute of Eco-Environment and Plant Protection, Shanghai Key Laboratory of Protection Horticultural Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
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Usatii M, Erickson LA, Cheville JC, Gupta S. Complex immunophenotypes: renal cell carcinoma with concurrent loss of SDHB/INI1 and FH/INI1. Hum Pathol 2023; 139:135-137. [PMID: 37196832 DOI: 10.1016/j.humpath.2023.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/08/2023] [Accepted: 05/09/2023] [Indexed: 05/19/2023]
Affiliation(s)
- Mariana Usatii
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - Lori A Erickson
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - John C Cheville
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA
| | - Sounak Gupta
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA.
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44
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Wang D, Gu C, Lv M, Wang Y. Roxadustat reduced the risk of perioperative complication arising from the treatment of cardiac paraganglioma: A case report. Asian J Surg 2023; 46:3899-3901. [PMID: 37045626 DOI: 10.1016/j.asjsur.2023.03.159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 03/28/2023] [Indexed: 04/14/2023] Open
Affiliation(s)
- Dong Wang
- Department of Anesthesiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Anesthesia and Respiratory Critical Care Medicine, Jinan, China
| | - Changping Gu
- Department of Anesthesiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Anesthesia and Respiratory Critical Care Medicine, Jinan, China
| | - Meng Lv
- Department of Anesthesiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Anesthesia and Respiratory Critical Care Medicine, Jinan, China
| | - Yuelan Wang
- Department of Anesthesiology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Institute of Anesthesia and Respiratory Critical Care Medicine, Jinan, China; Department of Anesthesiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Cheeloo College of Medicine, Jinan, China.
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Bancel LP, Masso V, Dessein AF, Aubert S, Leteurtre E, Coppin L, Odou MF, Cao CD, Cardot-Bauters C, Pigny P. Serum Succinate/Fumarate Ratio in Patients With Paraganglioma/Pheochromocytoma Attending an Endocrine Oncogenetic Unit. J Clin Endocrinol Metab 2023; 108:2343-2352. [PMID: 36848172 DOI: 10.1210/clinem/dgad109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 01/27/2023] [Accepted: 02/22/2023] [Indexed: 03/01/2023]
Abstract
CONTEXT Pheochromocytomas and paragangliomas (PPGLs) with SDHx pathogenic variants (PVs) are characterized by a higher intratissular succinate/fumarate ratio (RS/F) than non-SDHx-mutated ones. Also, an increase in serum succinate levels has been reported in patients with germline SDHB or SDHD PV. OBJECTIVE To assess whether measurement of serum succinate, fumarate levels, and RS/F might aid identification of an SDHx germline PV/likely pathogenic variant (LPV) in patients with PPGL or in asymptomatic relatives; and to guide identification of a PV/LPV among the variants of unknown significance (VUS) identified in SDHx by next-generation sequencing. METHODS This prospective monocentric study included 93 patients attending an endocrine oncogenetic unit for genetic testing. Succinate and fumarate were measured in serum by gas chromatography coupled to mass spectrometry. The RS/F was calculated to assess SDH enzymatic function. Diagnostic performance was assessed by receiver operating characteristic analysis. RESULTS RS/F had a higher discriminant power than succinate alone to identify an SDHx PV/LPV in patients with PPGL. However, SDHD PVs/LPVs are frequently missed. Only RS/F differed between asymptomatic SDHB/SDHD PV/LPV carriers and SDHB/SDHD-linked patients with PPGL. Finally RS/F could be helpful to easily evaluate the functional impact of VUS in SDHx. CONCLUSION Measurement of serum RS/F in patients with PPGL and in asymptomatic relatives is a valuable initial workup tool to detect those carrying a germline PV/LPV in SDHx. Its discriminative power is equal or superior to those of succinate measured alone. SDHD PVs/LPVs are less frequently identified by these biochemical tools. Use of RS/F for SDHx VUS reclassification needs to be evaluated further.
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Affiliation(s)
- Léo-Paul Bancel
- CHU Lille, Laboratoire de Biochimie-Hormonologie, Métabolisme, Nutrition, Oncologie, Centre de Biologie Pathologie, F.59037 Lille Cedex, France
| | - Vincent Masso
- CHU Lille, Laboratoire de Biochimie-Hormonologie, Métabolisme, Nutrition, Oncologie, Centre de Biologie Pathologie, F.59037 Lille Cedex, France
| | - Anne-Frederique Dessein
- CHU Lille, Laboratoire de Biochimie-Hormonologie, Métabolisme, Nutrition, Oncologie, Centre de Biologie Pathologie, F.59037 Lille Cedex, France
| | - Sébastien Aubert
- CHU Lille, Service d'Anatomie Pathologique, Centre de Biologie Pathologie, F-59037 Lille Cedex, France
| | - Emmanuelle Leteurtre
- University of Lille, CNRS, Inserm, CHU Lille, UMR9020-U1277-CANTHER-Cancer Heterogeneity, Plasticity and Resistance to therapies, F-59000 Lille, France
| | - Lucie Coppin
- CHU Lille, Laboratoire de Biochimie-Hormonologie, Métabolisme, Nutrition, Oncologie, Centre de Biologie Pathologie, F.59037 Lille Cedex, France
| | - Marie-Françoise Odou
- CHU Lille, Laboratoire de Biochimie-Hormonologie, Métabolisme, Nutrition, Oncologie, Centre de Biologie Pathologie, F.59037 Lille Cedex, France
| | - Christine Do Cao
- CHU Lille, Service d'Endocrinologie, Diabétologie, Métabolisme, Nutrition, Hôpital Claude Huriez, F-59037 Lille Cedex, France
| | - Catherine Cardot-Bauters
- CHU Lille, Service d'Endocrinologie, Diabétologie, Métabolisme, Nutrition, Hôpital Claude Huriez, F-59037 Lille Cedex, France
| | - Pascal Pigny
- CHU Lille, Laboratoire de Biochimie-Hormonologie, Métabolisme, Nutrition, Oncologie, Centre de Biologie Pathologie, F.59037 Lille Cedex, France
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Sopariwala DH, Rios AS, Saley A, Kumar A, Narkar VA. Estrogen-Related Receptor Gamma Gene Therapy Promotes Therapeutic Angiogenesis and Muscle Recovery in Preclinical Model of PAD. J Am Heart Assoc 2023; 12:e028880. [PMID: 37548153 PMCID: PMC10492941 DOI: 10.1161/jaha.122.028880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 06/30/2023] [Indexed: 08/08/2023]
Abstract
Background Peripheral arterial disease and critical limb ischemia are cardiovascular complications associated with vascular insufficiency, oxidative metabolic dysfunction, and myopathy in the limbs. Estrogen-related receptor gamma (ERRγ) has emerged as a dual regulator of paracrine angiogenesis and oxidative metabolism through transgenic mouse studies. Here our objective was to investigate whether postischemic intramuscular targeting of ERRγ via gene therapy promotes ischemic recovery in a preclinical model of peripheral arterial disease/critical limb ischemia. Methods and Results Adeno-associated virus 9 (AAV9) Esrrg gene delivery vector was developed and first tested via intramuscular injection in murine skeletal muscle. AAV9-Esrrg robustly increased ERRγ protein expression, induced angiogenic and oxidative genes, and boosted capillary density and succinate dehydrogenase oxidative metabolic activity in skeletal muscles of C57Bl/6J mice. Next, hindlimb ischemia was induced via unilateral femoral vessel ligation in mice, followed by intramuscular AAV9-Esrrg (or AAV9-green fluorescent protein) gene delivery 24 hours after injury. ERRγ overexpression increased ischemic neoangiogenesis and markers of endothelial activation, and significantly improved ischemic revascularization measured using laser Doppler flowmetry. Moreover, ERRγ overexpression restored succinate dehydrogenase oxidative metabolic capacity in ischemic muscle, which correlated with increased mitochondrial respiratory complex protein expression. Most importantly, myofiber size to number quantification revealed that AAV9-Esrrg restores myofibrillar size and mitigates ischemia-induced myopathy. Conclusions These results demonstrate that intramuscular AAV9-Esrrg delivery rescues ischemic pathology after hindlimb ischemia, underscoring that Esrrg gene therapy or pharmacological activation could be a promising strategy for the management of peripheral arterial disease/critical limb ischemia.
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Affiliation(s)
- Danesh H. Sopariwala
- Brown Foundation Institute of Molecular MedicineMcGovern Medical School at The University of Texas Health Science Center (UTHealth)HoustonTXUSA
| | - Andrea S. Rios
- Brown Foundation Institute of Molecular MedicineMcGovern Medical School at The University of Texas Health Science Center (UTHealth)HoustonTXUSA
| | - Addison Saley
- Department of BiosciencesRice UniversityHoustonTXUSA
| | - Ashok Kumar
- Department of Pharmacological and Pharmaceutical SciencesUniversity of HoustonTXUSA
| | - Vihang A. Narkar
- Brown Foundation Institute of Molecular MedicineMcGovern Medical School at The University of Texas Health Science Center (UTHealth)HoustonTXUSA
- Graduate School of Biomedical Sciences at UTHealthHoustonTXUSA
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Ricci L, Stanley FU, Eberhart T, Mainini F, Sumpton D, Cardaci S. Pyruvate transamination and NAD biosynthesis enable proliferation of succinate dehydrogenase-deficient cells by supporting aerobic glycolysis. Cell Death Dis 2023; 14:403. [PMID: 37414778 PMCID: PMC10326256 DOI: 10.1038/s41419-023-05927-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 06/06/2023] [Accepted: 06/23/2023] [Indexed: 07/08/2023]
Abstract
Succinate dehydrogenase (SDH) is the mitochondrial enzyme converting succinate to fumarate in the tricarboxylic acid (TCA) cycle. SDH acts as a tumor suppressor with germline loss-of-function mutations in its encoding genes predisposing to aggressive familial neuroendocrine and renal cancer syndromes. Lack of SDH activity disrupts the TCA cycle, imposes Warburg-like bioenergetic features, and commits cells to rely on pyruvate carboxylation for anabolic needs. However, the spectrum of metabolic adaptations enabling SDH-deficient tumors to cope with a dysfunctional TCA cycle remains largely unresolved. By using previously characterized Sdhb-deleted kidney mouse cells, here we found that SDH deficiency commits cells to rely on mitochondrial glutamate-pyruvate transaminase (GPT2) activity for proliferation. We showed that GPT2-dependent alanine biosynthesis is crucial to sustain reductive carboxylation of glutamine, thereby circumventing the TCA cycle truncation determined by SDH loss. By driving the reductive TCA cycle anaplerosis, GPT2 activity fuels a metabolic circuit maintaining a favorable intracellular NAD+ pool to enable glycolysis, thus meeting the energetic demands of SDH-deficient cells. As a metabolic syllogism, SDH deficiency confers sensitivity to NAD+ depletion achieved by pharmacological inhibition of nicotinamide phosphoribosyltransferase (NAMPT), the rate-limiting enzyme of the NAD+ salvage pathway. Beyond identifying an epistatic functional relationship between two metabolic genes in the control of SDH-deficient cell fitness, this study disclosed a metabolic strategy to increase the sensitivity of tumors to interventions limiting NAD availability.
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Affiliation(s)
- Luisa Ricci
- Cancer Metabolism Unit, Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, 20132, Milan, Italy
| | - Federico Uchenna Stanley
- Cancer Metabolism Unit, Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, 20132, Milan, Italy
| | - Tanja Eberhart
- Cancer Metabolism Unit, Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, 20132, Milan, Italy
| | - Francesco Mainini
- Cancer Metabolism Unit, Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, 20132, Milan, Italy
| | | | - Simone Cardaci
- Cancer Metabolism Unit, Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, 20132, Milan, Italy.
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Angeli SI, Chiossone K JA, Goncalves S, Telischi FF. Genotype-phenotype associations in paragangliomas of the temporal bone in a multi-ethnic cohort. Acta Otolaryngol 2023; 143:551-557. [PMID: 37354038 DOI: 10.1080/00016489.2023.2222149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/22/2023] [Accepted: 05/25/2023] [Indexed: 06/26/2023]
Abstract
BACKGROUND Temporal bone paragangliomas are rare tumours with variable presentation that can be hereditary. Identification of clinical and genetic factors of aggressive tumour behaviour is important. OBJECTIVE To determine the underlying genetic mutations and genotype/phenotype correlations in a multi-ethnic population of South Florida with sporadic temporal bone paragangliomas. METHODS In a cohort of glomus tympanicum (GT) and glomus jugulare (GJ) cases, we assessed the frequency of pathogenic single nucleotide variants, insertions, deletions, and duplications in coding exons of genes that have been associated with paragangliomas (SDHB, SDHC, SDHD, SDHA, SDHAF2, RET, NF1, VHL, TMEM127, and MAX). RESULTS None of the 12 GT cases had mutations. Among 13 GJ cases, we identified four mutation carriers (31%); two in SDHC, one in SDHB, and one in SDHD. All patients with pathogenic mutations were of Hispanic ethnicity, presented at a younger age (mean 27.5 versus 52.11 years), and with more advanced disease when compared to mutation-negative GJ cases.Conclusions and Significance: Mutations in the SDH genes are found in 31% of sporadic GJ. SDH-associated GJ had advanced disease and a 50% risk of metastasis. Our data supports emerging recommendations for genetic screening in all populations with GJ tumours as the genetic status informs management.
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Affiliation(s)
- Simon I Angeli
- University of Miami Miller School of Medicine, Otolaryngology, Miami, FL, USA
| | - Juan A Chiossone K
- University of Miami Miller School of Medicine, Otolaryngology, Miami, FL, USA
| | - Stefania Goncalves
- Neurotology Fellow, Jackson Memorial Hospital, Otolaryngology, Miami, FL, USA
| | - Fred F Telischi
- University of Miami Miller School of Medicine, Otolaryngology, Miami, FL, USA
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Sun X, Wang G, Huang Z, Li P, Yang B, Wang T, Li J. Succinate Dehydrogenase Defects Giant Renal Cell Carcinoma. Urol Int 2023; 107:819-822. [PMID: 37393904 PMCID: PMC10614438 DOI: 10.1159/000531059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Accepted: 12/22/2022] [Indexed: 07/04/2023]
Abstract
Succinate dehydrogenase (SDH)-deficient renal cell carcinoma (RCC) is a new subtype of RCC included in the 2016 edition of the WHO classification in RCC. SDH-defective RCC accounts for 0.05-0.2%, and preoperative diagnosis is difficult. We report a severe adherent RCC of inferior vena cava that underwent open radical nephrectomy after preoperative renal artery embolization. Postoperative histopathological examination diagnosed SDH-defective RCC; the clinicopathological stage was pT2b. After 10 months of follow-up, the patient had no evidence of disease recurrence. For patients with large RCC, interventional embolization can be selected to reduce intraoperative bleeding and blood transfusion, and it is recommended to complete interventional surgery within 3-4 h before surgery. SDH-deficient RCC is difficult to distinguish from other renal tumors in imaging, so immunohistochemical examination of SDHB is recommended for young and middle-aged patients, especially those under 45.
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Affiliation(s)
- Xia Sun
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Guang Wang
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Ziye Huang
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China,
| | - Pei Li
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Bowei Yang
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Tianyun Wang
- The Department of Pathology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
| | - Jiongming Li
- The Department of Urology, The Second Affiliated Hospital of Kunming Medical University, Kunming, China
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Alzohairy SA, Heger L, Nikzainalalam N, Miles TD. Cross-Resistance of Succinate Dehydrogenase Inhibitors (SDHI) in Botrytis cinerea and Development of Molecular Diagnostic Tools for SDHI Resistance Detection. Phytopathology 2023; 113:998-1009. [PMID: 36596212 DOI: 10.1094/phyto-09-22-0346-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Succinate dehydrogenase inhibitors (SDHIs) are keystone synthetic fungicides used to manage Botrytis cinerea in several hosts. In this study, we investigated the cross-resistance between five new SDHIs (pyraziflumid, isofetamid, benzovindiflupyr, fluxapyroxad, and pydiflumetofen) with commonly used SDHIs boscalid and fluopyram. Different mutations were detected in the sdhB gene in B. cinerea collected from Michigan grapes, and their frequency and EC50 value were determined. Among 216 B. cinerea boscalid-resistant isolates, five different mutations were detected, including H272R/Y, P225F/H, and N230I, at frequencies of 82.6, 4.3, 11.5, 0.4, and 5.3%, respectively. Five isolates of each genotype were used to screen the cross-resistance of the SDHIs. We classified the resistance profile of our mutants into five patterns. We report that all tested mutants were sensitive to benzovindiflupyr, indicating that it can be used as an effective fungicide against all B. cinerea mutants identified in this study. In addition, fluopyram, pydiflumetofen, and isofetamid can provide effective control according to which type of mutation is present in the field. We also developed and compared two molecular diagnostic tools, rhAMP and TaqMan assays, for rapid detection of SDHI resistance-associated mutants in B. cinerea. We report that the TaqMan assay was more successful than the rhAMP assay in detecting the B. cinerea mutant DNA at ≤10 pg and in a single assay was capable of monitoring two amino acid positions. Our results provide essential information about new SDHIs and provide molecular tools for monitoring SDHI resistance mutations, which will assist in gray mold disease control.
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Affiliation(s)
- S A Alzohairy
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A
- Agricultural Genetic Engineering Research Institute, Agricultural Research Center, Giza 12619, Egypt
| | - L Heger
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A
| | - N Nikzainalalam
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A
| | - T D Miles
- Department of Plant Soil and Microbial Sciences, Michigan State University, East Lansing, MI 48824, U.S.A
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