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Article

UHPLC-HESI-OT-MS-MS Biomolecules Profiling, Antioxidant and Antibacterial Activity of the “Orange-Yellow Resin” from Zuccagnia punctata Cav.

by
Jessica Gómez
1,2,
Mario J. Simirgiotis
3,4,*,
Sofía Manrique
1,2,
Beatriz Lima
1,2,
Jorge Bórquez
5,
Gabriela E. Feresin
1,2 and
Alejandro Tapia
1,*
1
Instituto de Biotecnología-Instituto de Ciencias Básicas, Universidad Nacional de San Juan, Av. Libertador General San Martín 1109 (O), San Juan CP 5400, Argentina
2
CONICET (Consejo Nacional de Ciencia y Tecnología), CABA, Buenos Aires C1405DJR, Argentina
3
Instituto de Farmacia, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja, Valdivia 5090000, Chile
4
Center for Interdisciplinary Studies on the Nervous System (CISNe), Universidad Austral de Chile, Valdivia 5090000, Chile
5
Laboratorio de Productos Naturales Depto. de Química, Facultad de Ciencias, Universidad de Antofagasta, Av. Coloso S-N, Antofagasta 1240000, Chile
*
Authors to whom correspondence should be addressed.
Antioxidants 2020, 9(2), 123; https://doi.org/10.3390/antiox9020123
Submission received: 30 December 2019 / Revised: 24 January 2020 / Accepted: 26 January 2020 / Published: 1 February 2020
(This article belongs to the Special Issue Phenolic Profiling and Antioxidant Capacity in Plants)
Browse Figures
Versions Notes

Abstract

:
This research was designed to investigate the metabolite profiling, phenolics, and flavonoids content as well as the potential antioxidant and antibacterial, properties of orange-yellow resin from Zuccagnia punctata Cav (ZpRe). Metabolite profiling was obtained by a ultrahigh resolution liquid chromatography orbitrap MS analysis (UHPLC-ESI-OT-MS-MS). The antioxidant properties were screened by four methods: 2,2-diphenyl-1-picrylhydrazyl assay (DPPH), trolox equivalent antioxidant activity assay (TEAC), ferric-reducing antioxidant power assay (FRAP), and lipid peroxidation in erythrocytes (LP)). The antibacterial activity was evaluated according to the Clinical and Laboratory Standards Institute (CLSI) rules. The resin displayed a strong DPPH scavenging activity (IC50 = 25.72 µg/mL) and showed a percentage of inhibition of LP close to that of the reference compound catechin (70% at 100 µg ZpRe/mL), while a moderated effect was observed in the FRAP and TEAC assays. The resin showed a content of phenolic and flavonoid compounds of 391 mg GAE/g and 313 mg EQ/g respectively. Fifty phenolics compounds were identified by ultrahigh resolution liquid chromatography orbitrap MS analysis (UHPLC-PDA-OT-MS) analysis. Thirty-one compounds are reported for the first time, updating the knowledge on the chemical profile of this species. The importance of the biomolecules identified support traditional use of this endemic plant. Furthermore, additional pharmacological data is presented that increase the potential interest of this plant for industrial sustainable applications.

1. Introduction

The resins are nonvolatile products of plants, which include surface resins, naturally secreted by plants or internal resins, which can be obtained or collected from incisions. Their chemical composition includes flavonoids, terpenoids, and fatty substances that in some cases are protective barrier for the plant against the attack of some herbivores and other insects [1]. A limited number of families including Fabaceae, Burseraceae, and Pinaceae stand out for their high resin production [1]. Argentina’s Andean region is the habitat of arid and semiarid land species belonging to the genera Larrea, Zuccagnia, and Bulnesia recognized for their high production of resins or exudates, of which there is a lack of knowledge about their potential as sources of biomolecules of pharmacological and industrial interest. Chemical studies carried out in the last decades have reported a limited number of metabolites. Plants exudates are known to possess several biological activities including antimicrobial, antioxidant, anthelmintic, and nematicidal [1,2]. Zuccagnia punctata is used in Argentina, to treat injuries and bruises, as a disinfectant of wounds, a repellent of insects, for roof construction in rural areas, and as a vegetable fuel for cooking food. Medicinal plants form a primary means for treatment of various diseases in many parts of the world. In Argentine Z. punctata is “the medicinal plant”, it has the largest number of studies of chemistry and biological activity, including antimicrobial, antioxidant, anti-mutagenic, anti-inflammatory, and cytoprotective activities [3].
Principally their bioactivities evidenced have been associated on the basis of the major component (chalcones) [4,5,6,7,8,9].Recently, a selective and reliable characterization of the botanical phenolic profile of Z.punctata collected in the northwestern regions of Argentina by liquid chromatography coupled to diode array detector and quadrupole-time of flight mass spectrometry (LC-DAD-Q-TOF-MS) system was reported, highlighting the identification of the major constituent of an ethanolic extract as 4′-hydroxy-2′methoxydihydrochalcone together with other chalcones, flavanones, and caffeic acid derivatives [10].
The interest on the Andean plants is remarkable, because they represent a source very little explored that can offer extracts or biomolecules promising for the study and development of new drugs of pharmacological interest.
In the last decades, several extracts, decoctions, and infusions of medicinal plants and fruits native to Argentina and Chile have been analyzed using the more accurate and reliable quadrupole orbitrap spectrometer (Q-OT-MS), updating significantly the chemical composition in most of the species reported [11,12,13,14,15,16,17,18,19].
In this work, the antioxidant and antibacterial effects complemented with the exhaustive polyphenolic profile of Zuccagnia punctata resin are reported, showing the presence of unique bioactive molecules of pharmacological and industrial interest.

2. Materials and Methods

2.1. Chemicals

Ultra-pure water (<5 µg/L TOC, (Total Organic Carbon) was obtained from a water purification system Arium 126 61316-RO, plus an Arium 611 UV unit (Sartorius, Goettingen, Germany). Methanol (HPLC grade) and formic acid (puriss. p.a. for mass spectrometry) from J.T. Baker (Phillipsburg, NJ, USA) were obtained. Folin-Ciocalteu (FC) reagent, 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric chloride hexahydrate, 2,4,6-tris(2-pyridyl)-s-triazine, trolox, quercetin, gallic acid, DMSO, and HPLC standards (caffeic acid phenethyl ether (CAPE), galangin, morusin, naringenin, pinocembrin, rhamnetin and shikonin, with purity higher than 95% by HPLC) were purchased from Sigma-Aldrich Chem. Co. (St. Louis, MO, USA) or Extrasynthèse (Genay, France). Cefotaxime was from Argentia® (Bristol-Myers Squibb, Buenos Aires, Argentina). Mueller-Hinton broth was provided by Laboratorio Britania (Buenos Aires, Argentina).

2.2. Plant Material

The aerial parts of Zuccagnia punctata Cav. (Fabaceae, Caesalpinoideae) were collected in February 2015, on Iglesia district, province of San Juan (Argentina) at an altitude of 1800 m above sea level. A voucher specimen has been deposited at the herbarium of the Botanic Museum of Córdoba (CORD 1125), Universidad Nacional de Córdoba, Argentina.

2.3. Z. punctata Orange-Yellow Resin (ZpRe)

The orange-yellow resin was obtained by dipping fresh aerial parts (500 g; 4L of dichloromethane grade HPLC, 1 min; the extraction procedure was done three times), filtered and evaporated under reduced pressure to yield a semisolid yellow-orange resin (10 ± 1% yield w/w). The ZpRe was stored in a freezer at −40 °C until its use to bioassays, phenolics, and flavonoids identification/quantification as well as in ultrahigh resolution liquid chromatography orbitrap MS analysis (UHPLC-PDA-OT-MS) analysis.
The main chalcones of Z.punctata: 2′,4′-dihydroxychalcone, 2′,4′-dihydroxy-3′-methoxychalcone and caffeic acid derivatives, 1-methyl-3-(3′,4′-dihydroxyphenyl)-propyl caffeic acid ester and 1-methyl-3-(4′-hydroxyphenil)-propyl caffeic acid ester were isolated and characterized by analysis of their spectroscopic data (1H and 13C NMR), which agree with those reported in the literature [3,6].

2.4. UHPLC-DAD-MS Instrument

An UHPLC-high-resolution MS machine Thermo Dionex Ultimate 3000 system with PDA detector controlled by Chromeleon 7.3 software (Thermo Fisher Scientific, Waltham, MA, USA) hyphenated with a Thermo Q-Exactive MS focus (Thermo, Bremen, Germany) was used [16].

2.5. LC Parameters and MS Parameters

Liquid chromatography was performed using an UHPLC C-18 column (150 × 4.6 mm Acclaim, ID, 2.5 µm; Thermo Fisher Scientific, Bremen, Germany) at 25 °C, hyphenated with a Thermo Q-Exactive MS focus (Thermo, Bremen, Germany) was used. The detection wavelengths were 330,280, 254, and 354 nm, and photodiode array detectors were set from 200–800 nm. Solvent delivery was performed at 1 mL/min using ultra-pure water supplemented with 1% formic acid (A) and acetonitrile with 1% acid formic (B) and a program starting with 5% B at zero time, then maintained 5% B for 5 min, then changing to 30% B within 10 min, then maintaining 30% B for 15 min, then going to 70% B for 5 min, then maintaining 70% B for 10 min, and finally returning to 5% B in 10 min. and keeping this condition for twelve additional minutes to achieve column stabilization before next injection of 20 µL. For the analysis, 5 mg of the resin was dissolved in 2 mL of methanol, filtered through a 200-µm PTFE (polytetrafluoroethylene) filter, and 20 µL was injected in the instrument. Standards and the resin dissolved in methanol were kept at 10 °C during storage in the autosampler. The HESI II and Orbitrap spectrometer (Thermo, Bremen, Germany) parameters were optimized as previously reported [16,17]. Additionally, relevant experimental parameters have been reported recently in detail [18] The Q-Exactive 2.3 SP 2, Xcalibur 2.4 and Trace Finder 3.3 (Thermo Fisher Scientific, Bremen, Germany) were used for UHPLC mass spectrometer control and data processing, respectively.

2.6. Total Phenolic (TP) and Flavonoid (F) Content

The total phenolics and flavonoid content of ZpRe was determined by employing total phenols assay by Folin–Ciocalteu reagent and flavonoids by AlCl3 assay, both in microplate [18]. The total phenolic was expressed as milligrams of gallic acid equivalents (GAE) per gram of extracts (mg GAE/g ZpRe). Flavonoids were expressed as milligrams of quercetin equivalents (QE) per gram of extracts (mg QE/g ZpRe). The values were obtained using a Multiskan FC Microplate Photometer (Thermo Scientific, Waltham, MA, USA), and are showed as the mean ± standard deviation (SD).

2.7. Antioxidant Activity

2.7.1. 2,2-Diphenyl-1-picrylhydrazyl Radical Scavenging Capacity Assay

The Capacity of ZpRe to 2,2-Diphenyl-1-picrylhydrazyl Radical Scavenging (DPPH) was run by the following procedure: DPPH solution (20 mg/L) in methanol was mixed with ZpRe solution at concentrations of 1, 5, 10, 50, and 100 µg/mL [18]. The reaction progress absorbance of the mixture was monitored at 515 nm using a Multiskan FC Microplate Photometer (Thermo Scientific, Waltham, MA, USA). The percentage of the DPPH decoloration was proportional to the five antioxidant concentrations, and the concentration responsible for a decrease in the initial DPPH concentration by 50% was defined and calculated as EC50 value, which is showed as the mean ± SD.

2.7.2. Ferric-Reducing Antioxidant Power Assay (FRAP)

The FRAP assay was run in microplate, as previously reported methodology [18,20]. Briefly, FRAP reagent and a methanolic solution of ZpRe resin (1 mg/mL) were mixed; simultaneously, a calibration curve was prepared by mixing FRAP reagent and Trolox solutions, at concentrations between 0 and 1 mmol/L. The absorbance values of mixtures were obtained in a Multiskan FC Microplate Photometer Results were obtained by linear regression from the FRAP-Trolox calibration plot and are showed in equivalent milligrams Trolox/g ZpReresin.

2.7.3. Trolox Equivalent Antioxidant Activity Assay (TEAC)

TEAC assay was run in microplate, as following the previously reported methodology [18,21]. Briefly, a ZpRe methanolic solution was mixed with 200 µL of ABTS, measuring their absorbance at 734 nm after 4 min. Results were obtained by linear regression from a calibration curve constructed with Troloxand are showed expressed as equivalent milligrams Trolox/g ZpRe resin.

2.7.4. Lipid Peroxidation in Erythrocytes

The ability of the ZpReresin at three concentrations (100, 250, and 500 µg/mL) and of catechin at a single concentration (100 µg/mL) to inhibit lipoperoxidation in erythrocytes (LP), induced by tert-Butyl hydroperoxide, was determined. Relevant technical aspects of the trial have been reported recently in detail [15,18]. The values obtained are expressed as percentages of lipid oxidation inhibition.

2.8. Antibacterial Activity

2.8.1. Microorganisms

For antibacterial evaluation, were used strains from the American Type Culture Collection (ATCC, Rockville, MD, USA) and clinical isolates from Laboratorio de Microbiología, Hospital Marcial Quiroga, San Juan, Argentina (MQ).The panel comprised the following bacteria: Staphylococcus aureus methicillin-sensitive ATCC 29213, Staphylococcus aureus methicillin-resistant ATCC 43300, Staphylococcus aureus methicillin-resistant-MQ1, Staphylococcus aureus methicillin-resistant-MQ2, Streptococcus agalactiae-MQ3, Streptococcus pyogenes-MQ4, and Escherichia coli ATCC 25922.

2.8.2. Antibacterial Susceptibility Testing

Minimum inhibitory concentration (MIC) of ZpRe and antibiotic Cefotaxime (Argentia®, Buenos Aires, Argentina) was carried outby broth microdilution techniques, in according to CLSI [22]. The ZpRe was tested from 0.98 to 3000 µg/mL.using an inoculum of each bacterium adjusted to 5 × 105 cells with colony forming units (CFU)/mL. The absorbances at 620 nm were determined in a Multiskan FC Microplate Photometer (Thermo Scientific, Waltham, MA, USA).

2.9. Statistical Analysis

The Duncan’s test from InfoStat edition 2016 software (Universidad Nacional de Córdoba, Argentina) was run to determine potential significant differences (p < 0.05) in the carried out assays

3. Results

3.1. UHPLC-PDA-OT-MS Analysis of the Orange-Yellow Resin From San Juan Province, Argentina

Fifty-one compounds were detected in ZpRe by UHPLC-PDA-OT-MS analysis, combining full mass spectra and MSn experiments, of which fifty were tentatively identified including flavonoids, chalcones, caffeic acid derivatives, coumaric acid esters, naphthoquinone, xanthene’s derivatives, trichocethenes; vedelianin derivatives, and others. Several phenolics compounds from ZpRe were rapidly identified using available standards. Thirty-one not previously reported updated the chemical composition of this species. The identification of unknown phenolic compounds xanthene’s characteristics of this bioactive plant was possible from comprehensive analysis of the full scan mass spectra, base peaks chromatograms, and data-dependent scan experiment, since the orbitrap provided high-resolution and accurate mass product ion spectra from precursor ions that are unknown before and within a single run.
The molecular formula was obtained through high resolution accurate mass analysis (HRAM) and matching with the isotopic pattern. The acquisition of the data in the UHPLC-PDA-OT-MS analysis was developed using electrospray negative mode, because compounds with a phenolic OH lose easily the proton in electrospray ionization, giving very good and diagnostic parent ions and fragments.
The metabolome identification of the 50 tentatively identified compounds is developed below, highlighting the relevant information of the 31 compounds that are new reports for the species (See Figure 1, Figure 2 and Figure 3, Table 1, and Supplementary Material Figure S1 for some representative compounds and spectra S1 and S2).

3.1.1. Flavonoids

Peak 2 with a [M − H]− ion at m/z: 271.06010 was identified as naringenin (C15H11O5−) [23], peak 3 as shikoniin (C9H7O4−; m/z: 287.09238) [24]; peak 4 as afzelechin (C15H13O5−; m/z: 273.07575) [25]; peak 6 as epiafzelechin (C15H13O5−; m/z: 273.07660) [26]; peak 7 showing a [M − H]− ion at m/z: 271.06110 was tentatively identified as an naringenin enantiomer (C15H11O5−); peak 8 was identified as 3,7-dihydroxiflavanone [10]; Peak 9 was tentatively identified as 7,8-dihydroxiflavone [10]; peak 10 was proposed as 5-Hydroxy-4′,7-dimethoxyflavanone [27]; peak 11, was identified as 3,7,8 trihydroxydihydroflavanone [10]; peak 14 with a [M − H]− ion at m/z: 271.06010 (C15H13O4−)was identified as guibourtinidol (2R,3S)-4′,7-Dihydroxyflavan-3-ol), (C15H13O4−) [28]; peak 17 was assigned to 7,4′-dihydroxy-5methoxy flavanone [10]; peak 18 is agree to dihydroxyflavanone [10]; peak 19 with a [M − H]− ion at m/z: 315.0511 was identified as rhamnetin (C16H11O7−) [29]; peak 20 was identified as 3,7-dihydroxyflavone [10]; peak 24 and 26 were identified as dihydroxyflavanone pinocembrin [3,10]; and its pinocembrin isomer; showing both compounds similarly MS/MS compared with authentically reference compounds; peak 27 was identified as 3,5,7-trihydroxyflavone (galangin) compared with compound of reference standard [3]; peak 33 was tentatively proposed as flavanone supported by UV signal at 287nm and MS/MS fragmentation (C15H11O3−; m/z: 239.07097); Peak 48 with a [M − H]− ion at m/z: 389.17566 was identified as shinflavanone (C25H25O4−; UV signals 287 nm) [30]; while peak 49 with a [M − H]− ion at m/z: 419.1502 was identified as prenylated flavonoid morusin (C25H23O6−) [31]; peak 50 was tentatively identified as 8-C-Prenyl-6″,6″-dimethylpyrano [2″,3″:7,6] flavanone (C25H25O3−; m/z: 373.18060); peak 51 with [M − H]− ion at m/z: 389.17572 and UV signals (287 nm) was identified as 3,7-dihydroxyflavone (C25H25O4).

3.1.2. Chalcones

Peaks 25 with a [M − H]− ion at m/z: 253.08669 was identified as 2′-hydroxy-4-methoxychalcone (C16H13O3−), while peaks 34, and 35 were identified as characteristics chalcones reported to Z. punctata 2′,4′-dihydroxychalcone and 2′,4′-dihydroxy-3′-methoxychalcone; both chalcones were determined by MS/MS experiment and compared with authentic reference compounds previously isolated [3].

3.1.3. Caffeic Acid Derivatives

Peak 12 was identified as 1-methyl-3-(3′,4′-dihydroxyphenil)-propyl caffeic acid ester by their MS/MS properties compared with authentic reference compounds previously isolated [7,10]; while peaks 13 and 15 with a [M − H]− ion at m/z: 343.11838 and 343.11870 respectively, were tentatively identified as 1-methyl-3-(3′,4′-dihydroxyphenil)-propyl caffeic acid ester isomers (C19H19O6−); peaks 21 was identified as 1-methyl-3-(4′-hydroxyphenil)-propyl caffeic acid ester by their MS/MS compared with authentically reference compounds previously isolated [7,10]; in the same way, peak 22 was assigned to 2-methyl-3-(3-hydroxy-4′-methoxyphenyl)-propyl caffeic acid ester, while peak 23 is supported by its mass properties as an isomer of compound 21; peak 28 was tentatively identified as recognized caffeic acid phenetyl ether; peak 42 was identified as 3,7-dimethyl-2,6-octadienyl caffeic acid ester; and peak 45 was identified as 3,7-dimethyl-2,6-octadienyl caffeic acid ester.

3.1.4. Coumaric Acid Esters

Peak 29 was identified as 4′-terbutyloxyphenyl p-coumaric acid ester [10], while peak 30 was tentatively proposed to 1-methyl-3-(4′-hydroxyphenyl)-propyl p-coumaric acid ester [10]; peak 31 by identical MS/MS properties and UV signals (C19H19O4−; m/z: 311.1289; 231–308–347 nm) was identified as a isomer of compound 30; and peak 37 was proposed supported by MS/MS fragmentation as isomer of compound 29.

3.1.5. Xanthene’s Derivatives, Trichothecenes; Vedelianin Derivatives, and Others

Peak 5 with a [M − H]− ion at m/z: 349.16456 was identified as trichothecene calonectrin (C19H25O6−) [32]. Peak 16 with a [M − H]− ion at m/z: 287.09232was identified as naphthoquinone derivative, shikoniin isomer (C16H15O5−).
Peak 32 with a [M − H]−ion at m/z: 349.16456 (C15H13O3−), was identified as dunnione. Peak 36 was identified as blestriarene B, with a [M − H]− ion at m/z: 479.14891 (C30H23O6−) [33].
Peak 38 with a [M − H]− ion at m/z: 477.22717 (C29H33O6−) was identified as glyvenol (tribenoside).
Peaks 40, 41, 43, 44, and 47 are structurally related, were thus assigned based on their mass properties and characteristic UV signals as the hexahydroxanthene derivative vedelianin (peak 40; C29H35O6−; m/z: 479.24338) [34] and some of its derivatives as follows: Peak 41 with a [M − H]− ion at m/z: 495.23813 (C29H35O7−)was identified as hidroxivedelianin; peak 43 with a [M − H]− ion at m/z: 495.23773 (C29H35O7−)was tentatively assigned to hidroxivedelianin isomer, peak 44, was identified as a reduced vedelianin (C29H33O6−; m/z: 477.22769); while peak 47 (C29H35O6−; m/z: 479.24338) was assigned to other vedelianin isomer, supported by identical MS/MS. A proposed biosynthesis and structures of vedelianin and some derivatives in Z punctata are showed in Figure 2. Peak 46 was tentatively identified as lupinifolin [35].

3.2. Total Phenolic and Flavonoid Contents and Antioxidant, and Antibacterial Activities

The orange-yellow resin from Z.punctata (ZpRe) displayed a stronger DPPH scavenging activity with an EIC50 25.72 µg/mL, as well as an outstanding inhibition of lipid peroxidation in erythrocytes (70% percent at 100 µg ZpRe/mL), this was comparable to the value shown by the reference compound catechin (74% at 100µg/mL) (Table 2) and to the values shown recently by others Andean species [14,15,18]. Phenolic antioxidant compounds acting as free radical scavengers can delay or inhibit lipid oxidation processes. This protection of polyunsaturated fatty acids against free radical damage may explain or supports phenolic compounds as a valuable natural product with potential to improve human health [36] Regarding FRAP and ABTS results, the ZpRe exhibited moderate effect in both trials. The ZpRe presented a high content of TP, with values of 391 mg GAE/g ZpRe, where as approximately eighty percent correspond to flavonoids (313 mg QE/g ZpRe).
Results of antibacterial activity are depicted in Table S1 (Supplementary Material).The ZpRe showed activity against Gram-positive bacteria, including Staphylococcus aureus methicillin-resistant ATCC 43300, S. aureus methicillin-resistant-MQ-1, S. aureus methicillin-resistant-MQ-2, S. aureus methicillin-sensitive ATCC 25923 and Streptococcus pyogenes (MICs values were between 125 and 250 µg/mL). However, the ZpRe resin was not active against most of the other strains tested (MIC values >250 µg/mL).
The antioxidant, antimicrobial, and other biological activities have been associated, by several authors, with the content of flavonoids and chalcones and some specific flavonoids such as pinocembrin [3,4,5,6,7,8,9]. In a previous study, the quantification of selected markers performed by HPLC-UV method, showed that the resin contains on average 3.18; 3.20; 16.04; and 12.84 g of pinocembrin (24), galangin (27), 2′,4′-dihydroxychalcone (34) and 2′,4′-dihydroxy-3′methoxychalcone (35) respectively, each quantified in 100 g of ZpRe [8].
However, the full UHPLC-MS identification of thirty one biomolecules for the first time in this species (peaks 2–7, 13–16, 19, 23, 25, 26, 31–33, 36–41, 43, 44, 46–51), some of them showing a broad spectra of pharmacological properties, including antioxidant and antimicrobial, canprovide additional and relevant support for the activities displayed by ZpRe resin. Figure 3 and Figure S2 show the structures of some newly reported compounds in the resin of this plant.
Pharmacological activities of naringenin (2), as therapeutic agent to treat different diseases, such as cancer, diabetes, cardiovascular diseases and neurological disorders, oxidative stress and inflammation have been extensively reported [37,38]. Additionally, antibacterial activity against Salmonella thypi, Staphylococcus aureus, and Escherichia coli ATCC as well as their antinociceptive and anti-inflammatory effect in mice model, have been also reported [39,40,41,42]. Furthermore, the free radical scavenging and antioxidant properties havebeen associated with improvements experienced by rats with diabetes type I treated with naringenin [43,44]. The protective effect against metabolic diseases of naringenin is supported by its ability to scavenging some free radicals, by its ability to induce antioxidant enzymes and targeting on phosphoinositide 3-kinase/protein Kinase B/nuclear factors [38]. These mechanisms are involved in the neuroprotective effect recently reported by Chandran et al. [45].
Shikonin (3) have demonstrated a broad spectrum of relevant biological activities such as, antioxidant, anti-inflammatory, antithrombotic, antimicrobial, wound healing effects, as well as neuroprotective effects against cerebral ischemia/reperfusion injury associated or supported to its antioxidant properties [46,47,48,49,50,51]. On the other hand, shikonin inhibited the proliferation of three human pancreatic cancer cell lines, and potentiated synergistically the cytotoxic effect of the gemcitabine a chemotherapeutic drug [52].
Additionally, afzelechin (4), epiafzelechin (6), and some catechol derivatives have been extensively reported as antioxidant compounds. Moreover, in relation to the antioxidant properties of afzelechin (4) its neuroprotective effect related to glutamate-induced neurotoxicity in HT22 cells has been informed [53,54,55,56].
Compound 25 (2-hydroxy-4–methoxychalcone) has been reported as antiangiogenic, antitumoral, glutathione S-transferase inhibitor, and as therapeutic agent to treat atherosclerosis. In addition, several epidemiological studies support the idea that regular consumption of fruits and vegetables rich in flavonoids reduces the risk of cardiovascular diseases [57,58,59].
In the other hand, the strong antibacterial activity of blestriarene B (36) and its antibacterial activity against Streptococcus mutans and Staphylococcus aureus (with MICs values of 12.5 and 6.25 µg/mL respectively) has been also reported [33].
Vedelianin (40) has been recently reported as a potent antiproliferative agent against several cancer cell lines [60,61]. The potential of morusin (49) against human colon rectal cancer and human cell lung cancer has been informed by Chang Lee et al. [62] and Park et al. [63]. Also, the cytotoxic activity of lupinifolin (46) in the cell line P-388 [35] was reported.
The tribenoside glyvenol, (38) was used clinically for hemorrhoidal disease associated with coagulation, inflammation, and wounds. Kikkawa et al. (2010) [64] reported that tribenoside interacts with epidermal cells and regulates the expression and localization of laminins to help reconstruct basement membranes in wound healing of hemorrhoids. Evidence exists to recommend the use of tribenoside as a fast, effective and safe option for the local treatment of low-grade hemorrhoids [65].
Regarding guibourtinidol (14), recently, the hepatoprotective activity and powerful antioxidant properties of Cassia abbreviata root extract, rich in (epi)-catechin, (epi)-afzelechin, (epi)-guibourtinidol, and (ent)-cassiaflavan monomers as well as their dimers and trimers has been reported [66].
Caffeic acid phenethyl ester (CAPE, 28) is a bioactive compound of propolis and the exudate extract. It is known that CAPE possesses antioxidant, anti-inflammatory, anticancer, and cytotoxic properties and is a versatile therapeutically active polyphenol and an effective adjuvant of chemotherapy [67,68,69,70,71].

4. Conclusions

Fifty phenolics compounds were identified by ultrahigh resolution liquid chromatography orbitrap MS analysis (UHPLC-PDA-OT-MS). Thirty-one are reported for the first time, updating the knowledge of the chemical profile of this species. The importance of the biomolecules identified support its traditional use. Herein, more scientific data on bioactivity and chemistry is showed for this plant that increase its potential for sustainable applications and industrial interest that Z. punctata offers, a species that grows in semi-arid Andean areas.

Supplementary Materials

The following are available online at https://www.mdpi.com/2076-3921/9/2/123/s1. Figure S1: (a–h). Full orbitrap MS spectra and structures of representative compounds 3, 4, 14, 28, 30, 40, 43, and 48. Figure S2: Structures of newly reported compounds to ZpRe. Table S1. Antimicrobial activity of ZpRe.

Author Contributions

M.J.S., G.E.F., B.L., and A.T. conceived and designed the experiments; J.G., B.L., and S.M. performed the antioxidant, antimicrobial, and total phenolic and flavonoid content experiments; M.J.S. and J.B. analyzed the data of HPLC/MS. All authors wrote the paper, and read and approved the final manuscript. All authors have read and agreed to the published version of the manuscript.

Funding

This research was funded by CICITCA-UNSJ, PME-2015-0200 and PIO CONICET-SECITI Nº 022, Argentina. M.J.S. and J.B. received financial support from Fondecyt, Chile (Grant 1180059).

Acknowledgments

J.G. and S.M. held fellowships from CONICET, Argentina. G.E.F. and B.L. are researchers from CONICET, Argentina.

Conflicts of Interest

The authors do not have any conflicts of interest.

References

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Antioxidants 09 00123 g001 550
Figure 1. UHPLC-MS (total ion current) chromatograms of ZpRe resin.
Figure 1. UHPLC-MS (total ion current) chromatograms of ZpRe resin.
Antioxidants 09 00123 g001
Antioxidants 09 00123 g002 550
Figure 2. Proposed biosynthesis and structures of Vedelianin and some derivatives in Z punctata.
Figure 2. Proposed biosynthesis and structures of Vedelianin and some derivatives in Z punctata.
Antioxidants 09 00123 g002
Antioxidants 09 00123 g003a 550Antioxidants 09 00123 g003b 550
Figure 3. Structures of some newly reported compounds in ZpRe resin.
Figure 3. Structures of some newly reported compounds in ZpRe resin.
Antioxidants 09 00123 g003aAntioxidants 09 00123 g003b
Table
Table 1. Resolution UHPLC-PDA-Q-Orbitrap identification of biomolecules from ZpRe resin.
Table 1. Resolution UHPLC-PDA-Q-Orbitrap identification of biomolecules from ZpRe resin.
PeakRetention Time (min)UV MaxTentative IdentificationElemental Composition [M − H]−Theoretical Mass (m/z)Measured Mass (m/z)Accuracy(δ ppm)MSnIons
11.33 unknownC16H15O585.00343
22.77279Naringenin aC15H11O5271.06110271.06013.67
33.35279–367Shikoniin aC16H15O5287.09325287.09233.40
43.65279Afzelechin aC15H13O5273.07575273.07663.22
54.05-Calonectrin aC19H25O6349.16456349.16542.5885.00342
64.18279EpiAfzelechin aC15H13O5273.07575273.07663.10
74.28287Naringenin enantiomer aC15H11O5271.06195271.06113.67151.0394:109.0286
84.312873,7-dihydroxiflavanoneC15H11O4255.06519255.06613.67151.0394:109. 0286
94.612877,8-dihydroxiflavoneC15H11O4255.06519255.06613.11237.0553
105.122875-hydroxy-4′,7-dimethoxyflavanoneC17H15O5299.09140299.09292.95285.0403;179.0345, 135.0444
115.382873,7,8-trihydroxydihydroflavanoneC15H11O5271.06010271.06103.33253.0503;225.0552;
197.0603;151.0029
125.67234-292-3251-methyl-3-(3′,4′-dihydroxyphenyl)-propyl caffeic acid esterC19H19O6343.11761343.11872.49179.0344;161.0236;
135.0443
135.88236-277-3121-methyl-3-(3′,4′-dihydroxyphenyl)-propyl caffeic acid ester isomer aC19H19O6343.11761343.11832.22257.0818;179.0345;
151.0393;135.0444;
107.0494
145.88236-277-312Guibourtinidol aC15H13O4257.08084257.08163.10179.0345;151.0393;
135.0444;107.0494
156.14279–3671-methyl-3-(3′,4′-dihydroxyphenil)-propyl caffeic acid ester isomer a C19H19O6343.11853343.11872.66287.0818;151.0393;
119.0495;107.0494
166.14279–367Shikoniin isomer aC16H15O5287.09140287.09233.18151.0393;119.0495;
107.0494
176.272857,4′-dihydroxy-5-methoxy-flavanoneC16H13O5285.07575285.07663.19149.9952;119.0495
186.73287DihydroxyflavanoneC15H11O4255.06519255.06693.05237.0553;209.0604;
195.0400
196.91251–349Rhamnetin aC16H11O7315.04993315. 05113.18185.0034,146.93796
207.18246-324-2373,7-dihydroxyflavoneC15H9O4253.05029253.04952.99208.0524;223.0326;
195.0447; 180.0576
217.31277 3141-methyl-3-(4′-hydroxyphenil)-propyl caffeic acid esterC19H19O5327.12357327.12272.64135.0443
227.55242, 291–3242-methyl-3-(3-hydroxy-4′-methoxyphenyl)-propyl caffeic acid esterC20H21O6357.13409357.13322.32343.1104;193.0500;
179.0343;161.0237;135.0440
237.70249-285-3231-methyl-3-(4′-hydroxyphenil)-propyl caffeic acid ester isomer aC19H19O5327.12380327.12273.01179.0344;163.0394;
135.0443;119.0494
248.04235-343PinocembrinC15H11O4255.06601255.06513.23227.0907;213.0503;
164.0109;151.0029;
123.0080
258.54239–3062′hydroxy-4-methoxychalcone aC16H13O3253.08592253.08663.02
269.00291Pinocembrin isomer aC15H11O4255.06599255.06513.17227.0709;213.0553;
164.0109;145.0642;
123.0080
279.14267-315-360Galangin(3,5,7-trihydroxyflavone)C15H9O5269.04579269.04533.22213.0551;169.0653
289.39242-268-310-357Caffeic acid phenetyl estherC17H15O14283.09649283.07943.38
299.612714′-terbutyloxyphenyl p-coumaric acid esterC19H19O4311.12866311.12862.91163.0394;119.0490
309.67231-308
347		1-methyl-3-(4′-hydroxyphenyl)-propyl p-coumaric acid esterC19H19O4311.12779311.12892.91179.0344;163.0394;
134.0366;119.0490
319.88231-308-3471-methyl-3-(4′-hydroxyphenyl)-propyl p-coumaric
acid ester isomer a		C19H19O4311.12866311.12892.81179.0344;163.0394;
135.0444;119.0494
3210.80277–312Dunnione aC15H13O3241.08592241.08662.98
3310.88287Flavanone *C15H11O3239.07027239.07092.91197.0603;169.0653;
153.0186;135.0080;
121.0280
3410.90232–3462′,4′-dihydroxychalconeC15H11O3239.07027239.0710 197.0603;169.0653;
153.0186;135.0080;
121.0280
3511.37232–3452′,4′-dihydroxy-3′-methoxychalconeC16H13O4269.08167269.08083.08
3611.77285Blestriarene B aC30H23O6479.14957479.148911.36
3711.91280–3234′-terbutyloxyphenyl p-coumaric acid ester isomer aC19H19O4311.12779311.12862.71179.0344;161.0237;
135.0442
3812.72283Glyvenol aC29H33O6477.22754477.22710.78
3912.952931-methyl-3-(3′,4′-dihydroxyphenil)-propyl caffeic acid ester isomer aC19H19O6343.11761343.1183 179.0344; 161.0238;
135.0444:
109.0286
4013.19280Vedelianin aC29H35O6479.24882479.24331.17
4113.47280Hidroxivedelianin aC29H35O7495.23773495.23810.82161.0238;135.0443;
109.0286
4213.93 3,7-dimethyl-2-octaenyl caffeic acid esterC19H21O4313.14344313.14432.91
4314.04267–357hidroxivedelianin isomer aC29H35O7495.23785495.23770.25479.2432;239.0710;
179.0345;161.0238;
135.0442
4414.42285Vedelianin reduced aC29H33O6477.22717477.22761.10
4515.26285–3203,7-dimethyl-2,6-octadienyl caffeic acid ester (geranyl Caffeate)C19H23O4315.16993315.16003.10178.0265;134.0364;
133. 0289
4616.58289-320LupinifolinC25H25O6405.16965405.1754−1.27
4716.58289Vedelianin isomer aC29H35O6479.24882479.24331.17
4816.89287Shinflavanone aC25H25O4389.17474389.17562.37371.1654
4917.39285Morusin aC25H23O6419.1502419.148912.21363.0873;179.0344;
151.0354;109.0286
5019.232918-C-Prenyl-6″,6″-dimethylpyrano [2″,3″:7,6] flavanone aC25H25O3373.19782373.18062.09
5119.68287Shinflavanone isomer aC25H25O4389.17474389.17572.52
a New reports for the species Zuccagnia punctata.
Table
Table 2. Antioxidant assays and total phenolic and flavonoids content of ZpRe from Z. punctata.
Table 2. Antioxidant assays and total phenolic and flavonoids content of ZpRe from Z. punctata.
Phenolics ContentZpRe
Total phenolics (mg GAE/g ZpRe)391.40 ± 2.18
Flavonoids (mg QE/g ZpRe)313.18 ± 3.10
Antioxidant Assay
DPPH (EC50 in µg ZpRe/mL)25.72 ± 1.51
FRAP (mg TE/g ZpRe)1.74 ± 0.13
TEAC (mg TE/g ZpRe)1.25 ± 0.01
Percentage LP (at 100 µg ZpRe/mL)70.14 ± 2.26
Percentage LP (at 100 µg catechin/mL)74.14 ± 1.25
No significant differences were found between the three samples. ANOVA (analysis of variance) followed by Dunett’s comparison test was used (significance p < 0.05). DPPH: (2,2-diphenyl-1-picrylhydrazyl; TEAC: trolox equivalent antioxidant activity assay; FRAP: ferric-reducing antioxidant power assay.

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Gómez, J.; Simirgiotis, M.J.; Manrique, S.; Lima, B.; Bórquez, J.; Feresin, G.E.; Tapia, A. UHPLC-HESI-OT-MS-MS Biomolecules Profiling, Antioxidant and Antibacterial Activity of the “Orange-Yellow Resin” from Zuccagnia punctata Cav. Antioxidants 2020, 9, 123. https://doi.org/10.3390/antiox9020123

AMA Style

Gómez J, Simirgiotis MJ, Manrique S, Lima B, Bórquez J, Feresin GE, Tapia A. UHPLC-HESI-OT-MS-MS Biomolecules Profiling, Antioxidant and Antibacterial Activity of the “Orange-Yellow Resin” from Zuccagnia punctata Cav. Antioxidants. 2020; 9(2):123. https://doi.org/10.3390/antiox9020123

Chicago/Turabian Style

Gómez, Jessica, Mario J. Simirgiotis, Sofía Manrique, Beatriz Lima, Jorge Bórquez, Gabriela E. Feresin, and Alejandro Tapia. 2020. "UHPLC-HESI-OT-MS-MS Biomolecules Profiling, Antioxidant and Antibacterial Activity of the “Orange-Yellow Resin” from Zuccagnia punctata Cav." Antioxidants 9, no. 2: 123. https://doi.org/10.3390/antiox9020123

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