Abstract
Marine-derived fungi proved to be a rich source of biologically active compounds. The genus Penicillium has been extensively studied regarding their secondary metabolites and biological applications. However, the photoprotective effects of these metabolites remain underexplored. Herein, the photoprotective potential of Penicillium echinulatum, an Antarctic alga-associated fungus, was assessed by UV absorption, photostability study, and protection from UVA-induced ROS generation assay on human immortalized keratinocytes (HaCaT) and reconstructed human skin (RHS). The photosafety was evaluated by the photoreactivity (OECD TG 495) and phototoxicity assays, performed by 3T3 neutral red uptake (3T3 NRU PT, OECD TG 432) and by the RHS model. Through a bio-guided purification approach, four known alkaloids, (-)-cyclopenin (1), dehydrocyclopeptine (2), viridicatin (3), and viridicatol (4), were isolated. Compounds 3 and 4 presented absorption in UVB and UVA-II regions and were considered photostable after UVA irradiation. Despite compounds 3 and 4 showed phototoxic potential in 3T3 NRU PT, no phototoxicity was observed in the RHS model (reduction of cell viability < 30%), which indicates their very low acute photoirritation and high photosafety potential in humans. Viridicatin was considered weakly photoreactive, while viridicatol showed no photoreactivity; both compounds inhibited UVA-induced ROS generation in HaCaT cells, although viridicatol was not able to protect the RHS model against UVA-induced ROS production. Thus, the results highlighted the photoprotective and antioxidant potential of metabolites produced by P. echinulatum which can be considered a new class of molecules for photoprotection, since their photosafety and non-cytotoxicity were predicted using recommended in vitro methods for topical use.
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References
Abdel-Hadi AM, Awad M, Abo-Dahab N, El-Shanawany A, Abdelkader M, Abo-Kadoum M (2015) Viridicatin and Dehydrocyclopeptine, two bioactive alkaloids isolated from marine derived fungus Penicillium aurantiogriseum AUMC 9759. Issues Biol Sci Pharma Res 3:115–122
Agrawal S, Adholeya A, Barrow CJ, Deshmukh SK (2018) Marine fungi: an untapped bioresource for future cosmeceuticals. Phytochem Lett 23:15–20
Andoh Y, Mizutani A, Ohashi T, Kojo S, Ishii T, Adachi Y, Ikehara S, Taketani S (2006) The Antioxidant Role of a Reagent, 2’,7’-Dichlorodihydrofluorescin Diacetate, Detecting Reactive-Oxygen Species and Blocking the Induction of Heme Oxygenase-1 and Preventing Cytotoxicity. J Biochem 140:483–489
Arcangeli C, Cannistraro S (2000) In situ Raman microspectroscopic identification and localization of carotenoids: approach to monitoring of UV-B irradiation stress on Antarctic fungus. Biopolymers 57:179–186
Armento AJ, Oldach J, Stolper G, Li M, Bachelor MA, Hayden PJ (2015) Evaluation of Cutaneous Damage and Repair Following Acute Solar Ultraviolet Radiation Exposure: Experiments with an In Vitro Reconstructed Human Skin Model and Excised Human Ski. Appl In Vitro Toxicol 1:109–117
Awad F, Assrawi E, Louvrier C, Jumeau C, Giurgea I, Amselem S, Karabina SA (2018) Photoaging and skin cancer: Is the inflammasome the missing link? Mech Ageing Dev 172:131–137
Boulis AG, Hamed AA, El-awady ME, Mohamed AR, Eliwa EM, Asker MMS, Shaaban M (2020) Diverse bioactive metabolites from Penicillium sp. MMA derived from the red sea: structure identification and biological activity studies. Arch Microbiol 202:1985–1996
Cadena-Aizaga MI, Montesdeoca-Esponda S, Torres-Padrón ME, Sosa-Ferrera Z, Santana-Rodríguez JJ (2020) Organic UV filters in marine environments: an update of analytical methodologies, occurrence and distribution. Trends Environ Anal Chem 25:e00079
Calculated using Advanced Chemistry Development (ACD/Labs) Software V11.02 (© 1994–2020 ACD/Labs)
Carpentieri-Rodrigues LN, Zanluchi JM, Grebogi IH (2007) Percutaneous absorption enhancers: mechanisms and potential. Braz Arch Biol Technol 50:949–961
Ceridono M, Tellner P, Bauer D, Barroso J, Alépée N, Corvi R, De Smedt A, Fellows MD, Gibbs NK, Heisler E, Jacobs A, Jirova D, Jones D, Kandárová H, Kasper P, Akunda JK, Krul C, Learn D, Wilcox P (2012) The 3T3 neutral red uptake phototoxicity test: practical experience and implications for phototoxicity testing-the report of an ECVAM-EFPIA workshop. Regul Toxicol Pharmacol 63:480–488
Corinaldesi C, Barone G, Marcellini F, Del’Anno A, Danovaro R (2017) Marine microbial-derived molecules and their potential use in cosmeceutical and cosmetic products. Mar Drugs 15:118
Diffey BL (1994) A method for broad spectrum classification of sunscreens. Int J Cosmet Sci 16:47–52
DiNardo JC, Downs CA (2018) Dermatological and environmental toxicological impact of the sunscreen ingredient oxybenzone/benzophenone-3. J Cosmet Dermatol 17:15–19
Downs CA, Kramarsky-Winter E, Segal R, Fauth J, Knutson S, Bronstein O, Ciner FR, Jeger R, Lichtenfeld Y, Woodley CM, Pennington P, Cadenas K, Kushmaro A, Loya Y (2016) Toxicopathological effects of the sunscreen UV filter, oxybenzone (Benzophenone-3), on coral Planulae and cultured primary cells and its environmental contamination in Hawaii and the U.S. Virgin Islands. Arch Environ Contam Toxicol 70:265–288
Eljarrat E, Barceló D (2003) Priority lists for persistent organic pollutants and emerging contaminants based on their relative toxic potency in environmental samples. TrAC-Trends Anal Chem 22:655–665
European Commission - Call for data on ingredients with potential endocrine-disrupting properties used in cosmetic products, European Commission (2019) Available at: https://ec.europa.eu/growth/content/call-data-ingredients-potential-endocrine-disrupting-properties-used-cosmetic-products_en. Accessed: 10 Nov 2020
Fisher GJ, Kang S, Varani J, Bata-Csorgo Z, Wan Y, Datta S, Voorhees JJ (2002) Mechanisms of photoaging and chronological skin aging. Arch Dermatol 138:1462–1470
Food and Drug Administration (FDA) (2019) Sunscreen Drug Products for Over-the-Counter Human Use, Federal Register, 84, 6204–6275. Available at: https://www.govinfo.gov/content/pkg/FR-2019-02-26/pdf/2019-03019.pdf. Accessed: 12 Aug 2020
Freitas JV, Lopes NP, Gaspar LR (2015a) Photostability evaluation of five UV-filters, trans-resveratrol and beta-carotene in sunscreens. Eur J Pharm Sci 78:79–89
Freitas JV, Praça FS, Bentley MV, Gaspar LR (2015b) Trans-resveratrol and beta-carotene from sunscreens penetrate viable skin layers and reduce cutaneous penetration of UV-filters. Int J Pharm 484:131–137
Fremlin LJ, Piggott AM, Lacey E, Capon RJ (2009) Cottoquinazoline A and cotteslosins A and B, metabolites from an Australian marine-derived strain of Aspergillus versicolor. J Nat Prod 72:666–670
Frisvad J (2015) Fungal Chemotaxonomy. In: Zeilinger S., Martín JF., García-Estrada C. (eds.) Biosynthesis and Molecular Genetics of Fungal Secondary Metabolites, Springer, New York, NY, pp. 103–121. https://doi.org/10.1007/978-1-4939-2531-5_7
Gaspar LR, Maia Campos PMBG (2006) Evaluation of the photostability of different U filter combinations in a sunscreen. Int J Pharm 307:123–128
Gaspar LR, Tharmann J, Maia Campos PMBG, Liebsch M (2013) Skin phototoxicity of cosmetic formulations containing photounstable and photostable UV-filters and vitamin a palmitate. Toxicol in Vitro 27:418–425
Gaspar LR, Kawakami CM, Benevenuto CG (2017) In: Eskes C, van Vliet E, Maibach H (eds.) Alternatives for Dermal Toxicity Testing, Springer International Publishing AG. Cham, Switzerland, pp. 463–476.
Hader DP (2000) Effects of solar UV-B radiation on aquatic ecosystems. Adv Space Res 26:2029–2040
Heurung AR, Raju SI, Warshaw EM (2014) Adverse reactions to sunscreen agents: epidemiology, responsible irritants and allergens, clinical characteristics, and management. Dermatitis 25:289–326
ICH - International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use, ICH Harmonized tripartite Guideline: Photosafety Evaluation of Pharmaceuticals S10, Step 4 version. International Conference on Harmonization of Technical Requirements for Registration of Pharmaceuticals For Human Use (2013). Available at: https://database.ich.org/sites/default/files/S10_Guideline.pdf. Accessed: 12 Aug 2020
Ighodaro OM, Akinloye OA (2018) First line defence antioxidants-superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX): their fundamental role in the entire antioxidant defense grid. Alexandria J Med 54:287–293
Ishikawa N, Tanaka H, Koyama F, Noguchi H, Wang CCC, Hotta K, Watanabe K (2014) Non heme dioxygenase catalyzes atypical oxidations of 6,7-bicyclic systems to form the 6,6 quinolone core of viridicatin-type fungal alkaloid**. Angew Chem Int Ed 53:1–6
JACVAM - Japanese Center for the Validation of Alternative Methods. Reactive oxygen species (ROS) assay to examine photoreactivity of chemicals (2013) Available at: http://www.jacvam.jp/files/news/ROS_protocol_v3.1_130920_clean.pdf. Accessed: 12 Aug 2020
Kalyanaraman B, Darley-Usmar V, Davies KJ, Dennery PA, Forman HJ, Grisham MB, Mann GE, Moore K, Roberts LJ, Ischiropoulos H (2012) Measuring reactive oxygen and nitrogen species with fluorescent probes: challenges and limitations. Free Radic Biol Med 52:1–6
Kandarova H, Liebsch M (2017) In: Eskes C, van Vliet E, Maibach HI (eds.) Alternatives for Dermal Toxicity Testing, Springer International Publishing: Cham, Switzerland, pp. 483–503. https://doi.org/10.1007/978-3-319-50353-0_35
Kaulmann A, Bohn T (2014) Carotenoids, inflammation, and oxidative stress—implications of cellular signaling pathways and relation to chronic disease prevention. Nutr Res 34:907–929
Kejlová K, Jírová D, Bendová H, Kandárová H, Weidenhoffer Z, Kolárová H, Liebsch M (2007) Phototoxicity of bergamot oil assessed by in vitro techniques in combination with human patch tests. Toxicol In Vitr 21:1298–1303
Kishimoto S, Hara K, Hashimoto H, Hirayama Y, Champagne PA, Houk KN, Tang Y, Watanabe K (2018) Enzymatic one-step ring contraction for quinolone biosynthesis. Nat Commun 9:2826
Kim AL, Labasi JM, Zhu Y, Tang X, McClure K, Gabel CA, Athar M, Bickers DR (2005) Role of p38 MAPK in UVB-Induced Inflammatory Responses in the Skin of SKH-1 Hairless Mice. J Invest Dermatol 124:1318–1325
Ko W, Sohn JH, Kim YC, Oh H (2015) Viridicatol from Marine-derived Fungal Strain Penicillium sp. SF-5295 Exerts Anti-inflammatory Effects through Inhibiting NF-κB Signaling Pathway on Lipopolysaccharide-induced RAW264.7 and BV2 Cells. Nat Prod Sci 21:240–247
Kobayashi Y, Harayama T (2009) A Concise and versatile synthesis of viridicatin alkaloids from cyanoacetanilides. Org Lett 11:1603–1606
Kogej T, Gostincar C, Volkmann M, Gorbushina AA, Gunde-Cimerman N (2006) Mycosporines in extremophilic fungi-novel complementary osmolytes. Environ Chem 3:105–110
Kumar A, Asthana M, Gupta A, Nigam D, Mahajan S (2018) In: (eds.) Secundary Metabolism and Antimicrobial Metabolites of Penicillium. New and Future Developments in Microbial Biotechnology and Bioengineering, New and Future Developments in Microbial Biotechnologya and Bioengineering, pp. 47–68.
Kurutas EB (2015) The importance of antioxidants which play the role in cellular response against oxidative/nitrosative stress: current state. Nutr J 15:71
Kusano M, Koshino H, Uzawa J, Fujioka S, Kawano T, Kimura Y (2000) Nematicidal alkaloids and related compounds produced by the fungus Penicillium cf. simplicissimum. Biosci Biotechnol Biochem 64:2559–2568
Li Y, Li X, Kang JS, Choi HD, Son BW (2004a) New radical scavenging and ultraviolet-A protecting prenylated dioxopiperazine alkaloid related to isoechinulin A from a marine isolate of the fungus Aspergillus. J Antibiot 57:337–340
Li Y, Li X, Kim SK, Kang JS, Choi HD, Rho JR, Son BW (2004) Golmaenone, a new diketopiperazine alkaloid from the marine-derived fungus Aspergillus sp. Chem Charmaceut Bull 52:375–376
Liang P, Zhang YY, Yang P, Grond S, Zhang Y, Qian ZJ (2019) Viridicatol and viridicatin isolated from a shark-gill-derived fungus Penicillium polonicum AP2T1 as MMP-2 and MMP-9 inhibitors in HT1080 cells by MAPKs signaling pathway and docking studies. Med Chem Res 28:1039–1048
Maciel OMC, Tavares RSN, Caluz DRE, Gaspar LR, Debonsi HM (2018) Photoprotective potential of metabolites isolated from algae-associated fungi Annulohypoxylon stygium. J Photochem Photobiol B 178:316–322
Maipas S, Nicolopoulou-Stamati P (2015) Sun lotion chemicals as endocrine disruptors. Hormones 14:32–46
Mancebo SE, Hu JY, Wang SQ (2014) Sunscreens: a review of health benefits, regulations, and controversies. Dermatol Clin 32:427–438
Marionnet C, Pierrard C, Golebiewski C, Bernerd F (2014) Diversity of biological effects induced by longwave UVA rays (UVA1) in reconstructed skin. PLoS One 9:e105263
Matsui MS (2016) In: Wang S, Lim H (eds.) Principles and Practice of Photoprotection. ADIS Cham, pp. 361–375
Nashev LG, Schuster D, Laggner C, Sodha S, Langer T, Wolber G, Odermatt A (2010) The UV-filter benzophenone-1 inhibits 17β-hydroxysteroid dehydrogenase type 3: Virtual screening as a strategy to identify potential endocrine disrupting chemicals. Biochem Pharmacol 79:1189–1199
Ngoc LTN, Tran VV, Moon JY, Chae M, Park D, Lee YC (2019) Recent trends of sunscreen cosmetic: an update review. Cosmetics 6:1–14
OECD- Organization for Economic Co-operation and Development, OECD guidelines for testing of chemicals test n°. 495: Ros (Reactive Oxygen Species) Assay for Photoreactivity (2019a) Available at: https://www.oecd-ilibrary.org/docserver/915e00ac-en.pdf. Accessed: 12 Aug 2020
OECD- Organization for Economic Co-operation and Development, OECD guidelines for testing of chemicals test n°. 432: In vitro 3T3 NRU Phototoxicity Test (2019b) Available at: Accessed: 12 Aug 2020
OECD- Organization for Economic Co-operation and Development, OECD guidelines for testing of chemicals test n°. 439: Reconstructed Human Epidermis Test Method (2020) Available at: Accessed: 14 Aug 2020
Onoue S, Hosoi K, Wakuri S, Iwase Y, Yamamoto T, Matsuoka N, Nakamura K, Toda T, Takagi H, Osaki N, Matsumoto Y, Kawakami S, Seto Y, Kato M, Yamada S, Ohno Y, Kojima H (2013) Establishment and intra-/inter-laboratory validation of a standard protocol of reactive oxygen species assay for chemical photosafety evaluation. J Appl Toxicol 33:1241–1250
Oren A, Gunde-Cimerman N (2007) Mycosporines and mycosporine-like amino acids: UV protectants or multipurpose secondary metabolites? FEMS Microbiol Lett 269:1–10
Ozáez I, Martínez-Guitarte JL, Morcillo G (2013) Effects of in vivo exposure to UV filters (4-MBC, OMC, BP-3, 4-HB, OC, OD-PABA) on endocrine signaling genes in the insect Chironomus riparius. Sci Total Environ 456–457:120–126
Peters B, Holzhütter HJ (2002) In vitro phototoxicity testing: development and validation of a new concentration response analysis software and biostatistical analyses related to the use of various prediction models. ATLA 30:415–432
Pillai S, Oresajo C, Hayward J (2005) Ultraviolet radiation and skin aging: roles of reactive oxygen species, inflammation and protease activation, and strategies for prevention of inflammation-induced matrix degradation – a review. Int J Cosmet Sci 27:17–34
Pivetta TP, Silva LB, Kawakami CM, Araújo MM, Del Lama MPFM, Naal RMZG, Maria-Engler SS, Gaspar LR, Marcato PD (2019) Topical formulation of quercetin encapsulated in natural lipid nanocarriers: Evaluation of biological properties and phototoxic effect. J Drug Deliv Sci Techno 53:101148
Ramaswamy BR (2015) In: Díaz-Cruz MS, Barceló D (eds.) Personal Care Products in the Aquatic Environment. Hdb Env Chem., pp. 139–164.
Rangel KC, Villela LZ, Pereira KC, Colepicolo P, Debonsi HM, Gaspar LR (2020) Assessment of the photoprotective potential and toxicity of Antarctic red macroalgae extracts from Curdiea racovitzae and Iridaea cordata for cosmetic use. Algal Res 50:101984–101997
Rasmussen C, Gratz K, Liebel F, Southall M, Garay M, Bhattacharyya S, Simon N, Vander Zanden M, Van Winkle K, Pirnstill J, Pirnstill S, Comer A, Allen-Hoffmann BL (2010) Comer, B. Allen-Hoffmann, The StrataTest® human skin model, a consistent in vitro alternative for toxicological testing. Toxicol Vitr 24:2021–2029
Rippka R, Deruelles J, Waterbury JB, Stanier RY (1979) Generic assignments, strain histories and properties ofpure cultures of cyanobacteria. J Gen Microbiol 111:1–61
Saewan N, Jimtaisong A (2015) Natural products as photoprotection. J Cosmet Dermatol 14:47–63
Satyanarayana T, Deshmukh SK, Deshpande MV (2019) Advancing in Mycology & Mycotechnology. Springer Nature, Singapore
SCCP - Scientific Committee on Consumer Products, Opinion on benzophenone-3. Colipa n°S38 adopted by the Scientific Committee on Consumer Products during the 10th Plenary. European Commission (2006) SCCP/1069/06. Available at: https://ec.europa.eu/health/ph_risk/committees/04_sccp/docs/sccp_o_078.pdf. Accessed: 10 Nov 2020
SCCS - Scientific Committee on Consumer Safety, The SCCS notes of guidance for the testing of cosmetic ingredients and their safety evaluation (2018) Available at: https://ec.europa.eu/health/sites/health/files/scientific_committees/consumer_safety/docs/sccs_o_224.pdf. Accessed: 05 Aug 2020
Schneider SL, Lim HW (2019) Review of environmental effects of oxybenzone and other sunscreen active ingredients. J Am Acad Dermatol 80:266–271
Shaath NA (2016) In: Wang S, Lim H (eds.) Principles and Practice of Photoprotection. ADIS, Cham, pp. 217–238.
Silva TR, Tavares RSN, Canela-Garayoa R, Eras J, Rodrigues MVN, Neri-Numa IA, Pastore GM, Rosa LH, Schultz JAA, Debonsi HM, Cordeiro LRG, Oliveira VM (2019) Chemical characterization and biotechnological applicability of pigments isolated from Antarctic bacteria. Mar Biotechnol 21:416–429
Springsteen A, Yurek R, Frazier M, Carr K (1999) In vitro measurement of sun protection factor of sunscreens by diffuse transmittance. Anal Chim Acta 380:155–164
Svobodova AR, Ryšava A, Psotova M, Kosina P, Zalešak B, Ulrichova J, Vostalova J (2017) The phototoxic potential of the flavonoids, taxifolin and quercetin. Photochem Photobiol 3:1240–1247
Tavares RSN, Kawakami CM, Pereira KC, Amaral GT, Benevenuto CG, Maria-Engler SS, Colepicolo P, Debonsi HM, Gaspar LR (2020) Fucoxanthin for Topical Administration, a Phototoxic vs. Photoprotective Potential in a Tiered Strategy Assessed by In Vitro Methods. Antioxidants 9:328
Torres A, Hochberg M, Pergament I, Smoum R, Niddam V, Dembitsky VM, Temina M, Dor I, Lev O, Srebnik M, Enk CD (2004) A new UV-B absorbing mycosporine with photo protective activity from the lichenized ascomycete Collema cristatum. Eur J Biochem 271:780–784
Tsui MMP, Lam JCW, Ng TY, Ang PO, Murphy MB, Lam PKS (2017) Occurrence, distribution, and fate of organic UV filters in coral communities. Environ Sci Technol 51:4182–4190
Uzun M, Demirezer LO (2019) Anti-aging power of Rumex crispus L.: matrixmetalloproteinases inhibitor, sun protective and antioxidant. S Afr J Bot 124:364–371
Wang J, Pan L, Wu S, Lu L, Xu Y, Zhu Y, Guo M, Zhuang S (2016a) Recent advances on endocrine disrupting effects of UV filters. Int J Environ Res Public Health 13:782–793
Wang X, Huang Y, Wang L, Xu L, Yu X, Liu Y, Li C, Zhan JY, Su Z, Chen J, Zeng H (2016b) Photo-protective activity of pogostone against UV-induced skin premature aging in mice. Exp Gerontol 77:76–86
Wang SQ, Lim HW (2016) Principles and practice of photoprotection. Springer International Publishing, Cham, Switzerland
Wei M, Yang R, Shao C, Wang C, Deng D, She Z, Lin Y (2011) Isolation, structure elucidation, crystal structure, and biological activity of a marine natural alkaloid, viridicatol. Chem Nat Compd 47:322–325
Wuttke W, Jarry H, Seidlova-Wuttke D (2010) Definition, classification and mechanism of action of endocrine disrupting chemicals. Hormones 9:9–15
Xu Y, Shao Y, Voorhees JJ, Fisher GJ (2006) Oxidative inhibition of receptor-type protein-tyrosine phosphatase κ by ultraviolet irradiation activates epidermal growth factor receptor in human keratinocytes. J Biol Chem 281:27389–27397
Young AR, Claveau J, Rossi AB (2017) Ultraviolet radiation and the skin: photobiology and sunscreen photoprotection. J Am Acad Dermatol 76:S100–S109
Zhang D, Yang X, Kang JS, Choi HD, Son BW (2008) Circumdatin I, a new ultraviolet-A protecting benzodiazepine alkaloid from a marine isolate of the fungus Exophiala. J Antibiot 61:40–42
Acknowledgements
The authors are thankful to University of São Paulo for providing access to necessary resources, the financial and fellowship support from the Brazilian research funding agencies Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) and Conselho Nacional de desenvolvimento Científico e Tecnológico (CNPq). The Department of Biomolecular Sciences and the Núcleo de Pesquisas em Produtos Naturais e Sintéticos – NPPNS are acknowledged.
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This study had financial and logistic support from the Brazilian Antarctic Program (PROANTAR/MCTI/CNPq N°64/2013), Brazilian Marine Force, National Institute of Science and Technology (INCT: BioNat), Grant #465637/2014-0, and the State of São Paulo Research Foundation (FAPESP), Grant #2014/50926-0 and 2017/03552-5.
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TRT prepared the design, conducted experiments, analyzed data, wrote, discussed, reviewed, and edited the manuscript. KCR, RSNT, CMK, and GSS conducted experiments, analyzed data, and contributed to the discussion part. SSME and PC edited and supervised the entire work. PC, LRG, and HMD designed, edited, supervised, and funded the project. All authors read and approved the manuscript.
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Teixeira, T.R., Rangel, K.C., Tavares, R.S.N. et al. In Vitro Evaluation of the Photoprotective Potential of Quinolinic Alkaloids Isolated from the Antarctic Marine Fungus Penicillium echinulatum for Topical Use. Mar Biotechnol 23, 357–372 (2021). https://doi.org/10.1007/s10126-021-10030-x
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DOI: https://doi.org/10.1007/s10126-021-10030-x