Tomasz Kowalczyk

Dr. Tomasz Kowalczyk

Department of Molecular Biotechnology and Genetics, University of Lodz
orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
30 November 2014 in Plant Cell, Tissue and Organ Culture (PCTOC)
Verified
Journal Article
Open access
PDF file
AGAneta Gerszberg
Aneta Gerszberg
KHKatarzyna Hnatuszko-Konka
Katarzyna Hnatuszko-Konka
Tomasz KowalczykTomasz Kowalczyk
Tomasz Kowalczyk
Andrzej Kiejstut KononowiczAndrzej Kiejstut Kononowicz
Andrzej Kiejstut Kononowicz
Originating in the Andes, the tomato ( Solanum lycopersicum L.) was imported to Europe in the 16th century. At present, it is an important crop plant cultivated all over the world, and its production and consumption continue to increase. This popular vegetable is known as a major source of important nutrients including lycopene, β-carotene, flavonoids and vitamin C as well as hydroxycinnamic acid derivatives. Since the discovery that lycopene has anti-oxidative, anti-cancer properties, interest in tomatoes has grown rapidly. The development of genetic engineering tools and plant biotechnology has opened great opportunities for engineering tomato plants. This review presents examples of successful tissue culture and genetically modified tomatoes which resistance to a range of environmental stresses improved, along with fruit quality. Additionally, a successful molecular farming model was established.

4 April 2014 in World Journal of Microbiology and Biotechnology
Verified
Journal Article
Open access
PDF file
Tomasz KowalczykTomasz Kowalczyk
Tomasz Kowalczyk
KHKatarzyna Hnatuszko-Konka
Katarzyna Hnatuszko-Konka
AGAneta Gerszberg
Aneta Gerszberg
Andrzej Kiejstut KononowiczAndrzej Kiejstut Kononowicz
Andrzej Kiejstut Kononowicz
Elastin-like polypeptides (ELP) are artificial, genetically encodable biopolymers, belonging to elastomeric proteins, which are widespread in a wide range of living organisms. They are composed of a repeating pentapeptide sequence Val–Pro–Gly–Xaa–Gly, where the guest residue (Xaa) can be any naturally occurring amino acid except proline. These polymers undergo reversible phase transition that can be triggered by various environmental stimuli, such as temperature, pH or ionic strength. This behavior depends greatly on the molecular weight, concentration of ELP in the solution and composition of the amino acids constituting ELPs. At a temperature below the inverse transition temperature (Tt), ELPs are soluble, but insoluble when the temperature exceeds Tt. Furthermore, this feature is retained even when ELP is fused to the protein of interest. These unique properties make ELP very useful for a wide variety of biomedical applications (e.g. protein purification, drug delivery etc.) and it can be expected that smart biopolymers will play a significant role in the development of most new materials and technologies. Here we present the structure and properties of thermally responsive elastin-like polypeptides with a particular emphasis on biomedical and biotechnological application.

1 July 2023 in Nutrients
Verified
Journal Article
Open access
PDF file
AMAnna Merecz-Sadowska
Anna Merecz-Sadowska
Przemyslaw SitarekPrzemyslaw Sitarek
Przemyslaw Sitarek
Tomasz KowalczykTomasz Kowalczyk
Tomasz Kowalczyk
KZKarolina Zajdel
Karolina Zajdel
MJMariusz Jęcek
Mariusz Jęcek
RZRadosław Zajdel
Radosław Zajdel
Anthocyanins are flavonoid compounds that are abundantly present in fruits and vegetables. These compounds contribute to the color of these foods and offer various health benefits to consumers due to their biological properties. There are more than 1000 types of anthocyanins in nature, all derived from 27 anthocyanidin aglycones that have different glycosylations and acylations. Malvidin is one of the most well-known anthocyanidins. Several studies, including those conducted on cell lines, animals, and humans, have suggested that malvidin and its glycosides possess anti-carcinogenic, diabetes-control, cardiovascular-disease-prevention, and brain-function-improvement properties. These health benefits are primarily attributed to their antioxidant and anti-inflammatory effects, which are influenced by the molecular mechanisms related to the expression and modulation of critical genes. In this article, we review the available information on the biological activity of malvidin and its glycosides concerning their health-promoting effects.

22 September 2024 in Antioxidants
Verified
Journal Article
Open access
PDF file
Tomasz KowalczykTomasz Kowalczyk
Tomasz Kowalczyk
MMMartyna Muskała
Martyna Muskała
AMAnna Merecz-Sadowska
Anna Merecz-Sadowska
JSJoanna Sikora
Joanna Sikora
Laurent PicotLaurent Picot
Laurent Picot
Przemyslaw SitarekPrzemyslaw Sitarek
Przemyslaw Sitarek
Anthocyanins, a class of flavonoid compounds responsible for the vibrant colors of many fruits and vegetables, have received considerable attention in recent years due to their potential health benefits. This review, focusing on evidence from both in vitro and in vivo studies, provides a comprehensive overview of the current state of knowledge regarding the health-promoting properties of anthocyanins. The chemical structure and diversity of anthocyanins, their bioavailability, and their mechanisms of action at the cellular and molecular level are examined. Research on the antioxidant, anti-inflammatory, anticancer, and neuroprotective effects of anthocyanins is critically reviewed. Special emphasis is placed on the role of anthocyanins in the prevention and treatment of chronic diseases such as cardiovascular diseases, diabetes, and neurodegenerative diseases. This review also discusses the challenges of translating in vitro findings to in vivo and highlights the importance of considering dose, bioavailability, and metabolism when assessing the therapeutic potential of anthocyanins. This review concludes with the identification of gaps in current research and suggestions for future directions for anthocyanin studies, including the need for more long-term clinical trials and investigations into potential synergistic effects with other phytochemicals. This comprehensive analysis highlights the promising role of anthocyanins in promoting human health and provides valuable insights for researchers, health professionals, and the nutraceutical industry. This study provides new insights, as it comprehensively investigates the dual anti-inflammatory and anticancer effects of anthocyanins in both in vitro and in vivo models. By uncovering the biological properties of anthocyanins from a variety of natural sources, this research not only expands our knowledge of the action of these compounds at the cellular level, but also enhances their clinical relevance through in vivo validation. Furthermore, the innovative use of anthocyanins may lead to important advances in their therapeutic application in the future.

5 May 2021 in Antioxidants
Verified
Journal Article
Open access
PDF file
AMAnna Merecz-Sadowska
Anna Merecz-Sadowska
Przemyslaw SitarekPrzemyslaw Sitarek
Przemyslaw Sitarek
EKEwa Kucharska
Ewa Kucharska
Tomasz KowalczykTomasz Kowalczyk
Tomasz Kowalczyk
KZKarolina Zajdel
Karolina Zajdel
RZRadosław Zajdel
Radosław Zajdel
Plants are rich sources of a diverse range of chemicals, many of which have significant metabolic activity. One large group of secondary compounds are the phenolics, which act as inter alia potent reactive oxygen scavengers in cells, including fibroblasts. These common dermis residue cells play a crucial role in the production of extracellular matrix components, such as collagen, and maintaining the integrity of connective tissue. Chronic wounds or skin exposure to UV-irradiation disrupt fibroblast function by the generation of reactive oxygen species, which may damage cell components and modify various signaling pathways. The resulting imbalance may be reversed by the antioxidant activity of plant-derived phenolic compounds. This paper reviews the current state of knowledge on the impact of phenolics on fibroblast functionality under oxidative stress conditions. It examines a range of compounds in extracts from various species, as well as single specific plant-derived compounds. Phenolics are a good candidate for eliminating the causes of skin damage including wounds and aging and acting as skin care agents.

Verified
Journal Article
Open access
PDF file
Przemyslaw SitarekPrzemyslaw Sitarek
Przemyslaw Sitarek
AMAnna Merecz-Sadowska
Anna Merecz-Sadowska
Tomasz KowalczykTomasz Kowalczyk
Tomasz Kowalczyk
JWJoanna Wieczfińska
Joanna Wieczfińska
RZRadosław Zajdel
Radosław Zajdel
TSTomasz Sliwinski
Tomasz Sliwinski
The skin is an important organ that acts as a physical barrier to the outer environment. It is rich in immune cells such as keratinocytes, Langerhans cells, mast cells, and T cells, which provide the first line of defense mechanisms against numerous pathogens by activating both the innate and adaptive response. Cutaneous immunological processes may be stimulated or suppressed by numerous plant extracts via their immunomodulatory properties. Several plants are rich in bioactive molecules; many of these exert antimicrobial, antiviral, and antifungal effects. The present study describes the impact of plant extracts on the modulation of skin immunity, and their antimicrobial effects against selected skin invaders. Plant products remain valuable counterparts to modern pharmaceuticals and may be used to alleviate numerous skin disorders, including infected wounds, herpes, and tineas.