Journals / Karaelmas Fen ve Mühendislik Dergisi / 2026 / Cilt: 15 Sayı: 2

Preliminary Studies on Gynostemma pentaphyllum (Thunb.) Makino toward Dietary Supplement Development: Antidiabetic Activity and Phytochemical Analysis

Gıda Takviyesine Giden Yolda Gynostemma pentaphyllum (Thunb.) Makino Bitkisi Üzerinde Ön Çalışmalar: Antidiyabetik Aktivite ve Fitokimyasal Analizler

Methiye Mancak(GAZI UNIVERSITY, FACULTY OF PHARMACY)0000-0002-0085-7552
Fatma Zeynep Uzuner(GAZİ ÜNİVERSİTESİ, ECZACILIK FAKÜLTESİ, ECZACILIK PR.)0009-0007-4763-3728
Ufuk Koca(GAZİ ÜNİVERSİTESİ, ECZACILIK FAKÜLTESİ, ECZACILIK MESLEK BİLİMLERİ BÖLÜMÜ, FARMAKOGNOZİ ANABİLİM DALI)0000-0002-5216-7588
Pages
15–21
Publication Date
2025-07-21
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Our research provides preliminary data for the preparation of standardized extracts and food supplements from G. pentaphyllum and is a pioneering work for further studies.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Gynostemma pentaphyllum (Thunb.) Makino is a plant belonging to the Cucurbitaceae family called jiaogulan.
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Key Findings & Data:The herb of the plant is used for the treatment of diabetes for many years.
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Conclusion & Impact:Our research provides preliminary data for the preparation of standardized extracts and food supplements from G. pentaphyllum and is a pioneering work for further studies.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Diyabet · fitokimyasal analiz · Gynostemma pentaphyllum

Abstract

Gynostemma pentaphyllum (Thunb.) Makino is a plant belonging to the Cucurbitaceae family called jiaogulan. The herb of the plant is used for the treatment of diabetes for many years. In the literature, the antidiabetic effect of G. pentaphyllum was determined by in vivo and clinical studies. On the other hand, it was determined that in vitro activity studies aimed at elucidating the mechanism of action of the plant are limited. Although there are commercial preparations containing the plant in America, Europe, China and Asian countries, it was determined that there is no product in Turkiye. Based on these deficiencies, the aim of this study was to determine the antidiabetic activity of G. pentaphyllum, to elucidate its mechanism of action and to perform preliminary phytochemical analyses to prepare standardized extracts in the future. As a result of the studies, it was determined that both methanol and aqueous extracts of the plant showed antidiabetic activity by inhibiting α-amylase and α-glucosidase enzymes under in vitro conditions. The methanol extract was much richer than the aqueous extract in terms of phenolic and flavonoid content. Our research provides preliminary data for the preparation of standardized extracts and food supplements from G. pentaphyllum and is a pioneering work for further studies.

Özet

Gynostemma pentaphyllum (Thunb.) Makino, jiaogulan olarak adlandırılan Cucurbitaceae familyasına ait bir bitkidir. Bitkinin toprak üstü kısımları uzun yıllardır diyabet tedavisi için kullanılmaktadır. Literatürde, G. pentaphyllum’un antidiyabetik etkisi in vivo ve klinik çalışmalar ile belirlenmiştir. Diğer taraftan bitkinin etki mekanizmasını aydınlatmaya yönelik in vitro aktivite çalışmalarının kısıtlı olduğu tespit edilmiştir. Amerika, Avrupa, Çin ve Asya ülkelerinde bitkiyi içeren ticari preparatları bulunsa da Türkiye’de herhangi bir ürünü bulunmadığı belirlenmiştir. Bu eksiklerden yola çıkarak bu çalışmada G. pentaphyllum’un antidiyabetik aktivitesinin belirlenmesi, etki mekanizmasının aydınlatılması ve ileride standardize ekstrelerinin hazırlanabilmesi için ön fitokimyasal analizlerinin yapılması amaçlanmıştır. Araştırmalar sonucunda bitkinin hem metanollü hem de sulu ekstresinin in vitro koşullarda α-amilaz ve α-glukozidaz enzimlerini inhibe ederek antidiyabetik aktivite gösterdiği tespit edilmiştir. Fenolik madde ve flavonoit içeriği bakımından metanollü ekstrenin sulu ekstreden çok daha zengin olduğu belirlenmiştir. Araştırmalarımız G. pentaphyllum’dan standart ekstre ve gıda takviyesi hazırlanması için ön verileri sağlamakta olup ileri çalışmalar için öncü bir çalışmadır.

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Cite This Article

Mancak, M., Uzuner, F. Z., Koca, U. (2025). Preliminary Studies on Gynostemma pentaphyllum (Thunb.) Makino toward Dietary Supplement Development: Antidiabetic Activity and Phytochemical Analysis. Karaelmas Fen ve Mühendislik Dergisi, Cilt: 15 Sayı: 2, 15–21. https://doi.org/10.7212/karaelmasfen.1620775

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