Jyoti Tanwar, Kriti Ahuja, Akshay Sharma, Paras Sehgal, Gyan Ranjan, Farina Sultan, Anushka Agrawal, Donato D'Angelo, Anshu Priya, Vamsi K Yenamandra, Archana Singh, Anna Raffaello, Muniswamy Madesh, Rosario Rizzuto, Sridhar Sivasubbu, Rajender K Motiani
{"title":"线粒体钙摄取通过角蛋白丝的转录调控协调脊椎动物的色素沉着","authors":"Jyoti Tanwar, Kriti Ahuja, Akshay Sharma, Paras Sehgal, Gyan Ranjan, Farina Sultan, Anushka Agrawal, Donato D'Angelo, Anshu Priya, Vamsi K Yenamandra, Archana Singh, Anna Raffaello, Muniswamy Madesh, Rosario Rizzuto, Sridhar Sivasubbu, Rajender K Motiani","doi":"10.1371/journal.pbio.3002895","DOIUrl":null,"url":null,"abstract":"<p><p>Mitochondria regulate several physiological functions through mitochondrial Ca2+ dynamics. However, role of mitochondrial Ca2+ signaling in melanosome biology remains unknown. Here, we show that pigmentation requires mitochondrial Ca2+ uptake. In vitro gain and loss of function studies demonstrate that mitochondrial Ca2+ uniporter (MCU) is crucial for melanogenesis while MCU rheostat, MCUb negatively control melanogenesis. Zebrafish, MCU+/- and MCUb-/- mice models show that MCU complex drives pigmentation in vivo. Mechanistically, MCU silencing activates transcription factor NFAT2 to induce expression of keratin (5, 7, and 8) filaments. Interestingly, keratin5 in turn augments mitochondrial Ca2+ uptake and potentiates melanogenesis by regulating melanosome biogenesis and maturation. Hence this signaling module acts as a negative feedback loop that fine-tunes both mitochondrial Ca2+ signaling and pigmentation. Notably, mitoxantrone, an FDA approved drug that inhibits MCU, reduces pigmentation thereby highlighting therapeutic potential of targeting mitochondrial Ca2+ uptake for clinical management of pigmentary disorders. Taken together, we reveal an MCU-NFAT2-Keratin5 driven signaling axis that acts as a critical determinant of mitochondrial Ca2+ uptake and pigmentation. Given the vital role of mitochondrial Ca2+ signaling and keratin filaments in cellular physiology, this feedback loop could be operational in a variety of other patho-physiological processes.</p>","PeriodicalId":49001,"journal":{"name":"PLoS Biology","volume":"22 11","pages":"e3002895"},"PeriodicalIF":9.8000,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11581414/pdf/","citationCount":"0","resultStr":"{\"title\":\"Mitochondrial calcium uptake orchestrates vertebrate pigmentation via transcriptional regulation of keratin filaments.\",\"authors\":\"Jyoti Tanwar, Kriti Ahuja, Akshay Sharma, Paras Sehgal, Gyan Ranjan, Farina Sultan, Anushka Agrawal, Donato D'Angelo, Anshu Priya, Vamsi K Yenamandra, Archana Singh, Anna Raffaello, Muniswamy Madesh, Rosario Rizzuto, Sridhar Sivasubbu, Rajender K Motiani\",\"doi\":\"10.1371/journal.pbio.3002895\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Mitochondria regulate several physiological functions through mitochondrial Ca2+ dynamics. However, role of mitochondrial Ca2+ signaling in melanosome biology remains unknown. Here, we show that pigmentation requires mitochondrial Ca2+ uptake. In vitro gain and loss of function studies demonstrate that mitochondrial Ca2+ uniporter (MCU) is crucial for melanogenesis while MCU rheostat, MCUb negatively control melanogenesis. Zebrafish, MCU+/- and MCUb-/- mice models show that MCU complex drives pigmentation in vivo. Mechanistically, MCU silencing activates transcription factor NFAT2 to induce expression of keratin (5, 7, and 8) filaments. Interestingly, keratin5 in turn augments mitochondrial Ca2+ uptake and potentiates melanogenesis by regulating melanosome biogenesis and maturation. Hence this signaling module acts as a negative feedback loop that fine-tunes both mitochondrial Ca2+ signaling and pigmentation. Notably, mitoxantrone, an FDA approved drug that inhibits MCU, reduces pigmentation thereby highlighting therapeutic potential of targeting mitochondrial Ca2+ uptake for clinical management of pigmentary disorders. Taken together, we reveal an MCU-NFAT2-Keratin5 driven signaling axis that acts as a critical determinant of mitochondrial Ca2+ uptake and pigmentation. 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Mitochondrial calcium uptake orchestrates vertebrate pigmentation via transcriptional regulation of keratin filaments.
Mitochondria regulate several physiological functions through mitochondrial Ca2+ dynamics. However, role of mitochondrial Ca2+ signaling in melanosome biology remains unknown. Here, we show that pigmentation requires mitochondrial Ca2+ uptake. In vitro gain and loss of function studies demonstrate that mitochondrial Ca2+ uniporter (MCU) is crucial for melanogenesis while MCU rheostat, MCUb negatively control melanogenesis. Zebrafish, MCU+/- and MCUb-/- mice models show that MCU complex drives pigmentation in vivo. Mechanistically, MCU silencing activates transcription factor NFAT2 to induce expression of keratin (5, 7, and 8) filaments. Interestingly, keratin5 in turn augments mitochondrial Ca2+ uptake and potentiates melanogenesis by regulating melanosome biogenesis and maturation. Hence this signaling module acts as a negative feedback loop that fine-tunes both mitochondrial Ca2+ signaling and pigmentation. Notably, mitoxantrone, an FDA approved drug that inhibits MCU, reduces pigmentation thereby highlighting therapeutic potential of targeting mitochondrial Ca2+ uptake for clinical management of pigmentary disorders. Taken together, we reveal an MCU-NFAT2-Keratin5 driven signaling axis that acts as a critical determinant of mitochondrial Ca2+ uptake and pigmentation. Given the vital role of mitochondrial Ca2+ signaling and keratin filaments in cellular physiology, this feedback loop could be operational in a variety of other patho-physiological processes.
期刊介绍:
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