Alejandro Yam-Puc

Antioxidant Activities of Pentacyclic Triterpenes From Melipona beecheii Propolis and Their Semisynthetic Derivatives

Aaron Andrés Santana Hernandez, Alejandro Yam-Puc, Pamela Yah‐Nahuat, María de Lourdes Vargas y Vargas et autres

ABSTRACT Four principal fractions ( I ‐ IV ) were obtained from the Melipona beecheii propolis. GC‐MS analysis of these fractions allowed us to recognize 11 pentacyclic triterpenes (PTs), fraction I [β‐amyrin acetate ( 1 ), germanicol acetate ( 2 ), moretenol …

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Physicochemical and Nutritional Composition of Pot-pollen of Stingless bee Melipona beecheii in Yucatan, Mexico

Alejandro Yam-Puc, Anahi Chan-Paz, R. Chan, Jesús Ramón-Sierra et autres

The stingless bee Melipona beecheii, known as “Xunan Kab” in the Mayan language, is the only species that has been domesticated by the Mayans since immemorial time. Pot-pollen is collected, processed, and stored by stingless bees, in cerumen containers, which is used …

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Antioxidant and Antibacterial Properties of Ethanolic Pot‐Pollen Extracts of Melipona beecheii and Determination of the Major Components by GC‐MS

Patricia Calderon-Martínez, Alejandro Yam-Puc, Jesús Ramón-Sierra, Gloria Ivonne Hernández‐Bolio et autres

Abstract Melipona beecheii pot‐pollen is a natural product that has barely been studied, unlike other hive products such as honey and propolis. Its application has been reported since ancient times in traditional Mayan medicine, and it is also a functional food with …

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Pulcaffeate, a Trimeric Caffeic Acid Derivative from Bourreria pulchra

Gilda J. Erosa-Rejón, Alejandro Yam-Puc, Luis M. Peña-Rodrı́guez, Olov Sterner

Abstract. The trimeric caffeic acid derivative pulcaffeate (1) was isolated from the organic crude extract of the roots of Bourreria pulchra (Boraginaceae). The biosynthesis of 1 appears to involve an intramolecular Diels-Alder reaction between a cyclohexa-1,3-diene intermediate, generated by the oxidation of …

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Antimicrobial and antioxidant activity of proteins isolated from Melipona beecheii honey

Jesús Ramón-Sierra, Marco A. Villanueva, Alejandro Yam-Puc, Martha Alicia Rodríguez-Mendiola et autres

Proteins from Melipona beecheii honey were purified by concanavalin A (conA) affinity chromatography and eluted with a stepwise glucose gradient into fractions named F2-F5. The conA-unbound fraction (F1) was further separated by molecular exclusion into fractions named MbF1-1,2 and MbF1-3. All fractions …

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Anti-inflammatory and anti-hypersensitive effects of the chalcone isocordoin and its semisynthetic derivatives in mice

Gislaine Francieli da Silva, Fátima de Campos Buzzi, José Roberto Santin, Alejandro Yam-Puc et autres

Isocordoin (1), a chalcone isolated from different plants, has been found to present a range of interesting biological properties. This study aimed to evaluate the anti-hypersensitive and anti-inflammatory effects of isocordoin (1) and several natural and semisynthetic derivatives (2-10). Initial evaluation of …

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Effects of phenolic and protein extracts from Melipona beecheii honey on pathogenic strains of Escherichia coli and Staphylococcus aureus

Jesús Ramón-Sierra, José Luis Martínez-Guevara, Luis Pool-Yam, Denis Magaña-Ortíz et autres

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Establishment of Hairy Root Cultures of Pentalinon andrieuxii for the Production of Betulinic Acid

Alejandro Yam-Puc, Sandoval-Antúnez Carlos Alberto, José Esteban de los Santos-Castillo, Elidé Avilés-Berzunza et autres

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Isocordoin Derivatives From the Root Extract of Lonchocarpus xuul

Alejandro Yam-Puc, Luis M. Peña-Rodrı́guez

Two natural isocordoin derivatives, dihydroisocordoin (1) and flemistrictin B (2), were isolated from the root extract of Lonchocarpus xuul. Both metabolites were identified on the basis of their spectroscopic data and by comparing them with those reported in the literature.

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Partial characterization of ethanolic extract of Melipona beecheii propolis and in vitro evaluation of its antifungal activity

Jesús Ramón-Sierra, Enrique Eduardo Peraza-López, Raquel Rodríguez-Borges, Alejandro Yam-Puc et autres

The ethanolic extract of Melipona beecheii Bennett 1831, propolis from Yucatán Mexico was evaluated in vitro for the determination of its phenolic compound content, antioxidant capacity and antifungal activity. The results were compared against those of the ethanolic extract of Apis mellifera …

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Pentacyclic triterpenes and other constituents in propolis extract from Melipona beecheii collected in Yucatan, México

Alejandro Yam-Puc, Aaron Andrés Santana Hernandez, Pamela N. Yah-Nahuat, Jesús Ramón-Sierra et autres

Thirteen pentacyclic triterpenes, methyl 3-oxours-12-en-23-oate, marsformosanone, taraxerone, β-amyrenone, α-amyrenone, lupenone, 24-methylencycloartan-3-one, moretenol acetate, β-amyrin acetate, germanicol acetate, 24-methylencycloartanyl acetate, β-amyrin, and α-amyrin were identified in a chloroform-methanol propolis extract from Melipona beecheii. Additionally, were identified in this propolis, hexadecanoic acid, methyl ester, …

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Ecological Strategies Behind the Selection of Cultivable Actinomycete Strains from the Yucatan Peninsula for the Discovery of Secondary Metabolites with Antibiotic Activity

Yessica Parera-Valadez, Alejandro Yam-Puc, Lluvia Korynthia López-Aguiar, Rocı́o Borges-Argáez et autres

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