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de Souza JB, de Almeida Campos LA, Palácio SB, Brelaz-de-Castro MCA, Cavalcanti IMF. Prevalence and implications of pKs-positive Escherichia coli in colorectal cancer. Life Sci 2024; 341:122462. [PMID: 38281542 DOI: 10.1016/j.lfs.2024.122462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 01/13/2024] [Accepted: 01/23/2024] [Indexed: 01/30/2024]
Abstract
Colorectal cancer (CRC) remains a significant global health concern, necessitating continuous investigation into its etiology and potential risk factors. Recent research has shed light on the potential role of pKs-positive Escherichia coli (pKs + E. coli) and colibactin in the development and progression of CRC. Therefore, this review aimed to provide an updated analysis of the prevalence and implications of pKs + E. coli in colorectal cancer. We conducted a literature review search in major scientific databases to identify relevant studies exploring the association between pKs + E. coli and CRC. The search strategy included studies published up to the present date, and articles were carefully selected based on predefined inclusion criteria. Thus, the present study encompasses scientific evidence from clinical and epidemiological studies supporting the presence of pKs + E. coli in CRC patients, demonstrating a consistent and significant association in multiple studies. Furthermore, we highlighted the potential mechanisms by which colibactin may promote tumorigenesis and cancer progression within the colorectal mucosa, including the production of genotoxic virulence factors. Additionally, we explored current diagnostic methods for detecting pKs + E. coli in clinical settings, emphasizing the importance of accurate identification. Moreover, we discussed future strategies that could utilize the presence of this strain as a biomarker for CRC diagnosis and treatment. In conclusion, this review consolidated existing evidence on the prevalence and implications of pKs + E. coli in colorectal cancer. The findings underscore the importance of further research to elucidate the precise mechanisms linking this strain to CRC pathogenesis and to explore its potential as a therapeutic target or diagnostic marker. Ultimately, a better understanding of the role of pKs + E. coli in CRC may pave the way for innovative strategies in CRC management and patient care.
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Affiliation(s)
| | | | - Sarah Brandão Palácio
- Research, development and innovation subdivision (SDPI) of Chemical-Pharmaceutical Laboratory of Aeronautics (LAQFA), Rio de Janeiro, RJ, Brazil
| | | | - Isabella Macário Ferro Cavalcanti
- Keizo Asami Institute (iLIKA), Federal University of Pernambuco (UFPE), Recife, PE, Brazil; Academic Center of Vitória (CAV), Federal University of Pernambuco (UFPE), Vitória de Santo Antão, PE, Brazil.
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Wang T, Udayabhanu J, Gu X, Wu R, Xin S, Chen Q, Zhang Y, Yang X, Peng S, Chen J, Huang T. Induction of Axillary Bud Swelling of Hevea brasiliensis to Regenerate Plants through Somatic Embryogenesis and Analysis of Genetic Stability. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12091803. [PMID: 37176861 PMCID: PMC10181009 DOI: 10.3390/plants12091803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 04/19/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023]
Abstract
To overcome rubber tree (RT) tissue culture explant source limitations, the current study aimed to establish a new Hevea brasiliensis somatic embryogenesis (SE) system, laying the technical foundation for the establishment of an axillary-bud-based seedling regeneration system. In this study, in vitro plantlets of Hevea brasiliensis Chinese Academy of Tropical Agricultural Sciences 917 (CATAS 917) were used as the experimental materials. Firstly, the optimum conditions for axillary bud swelling were studied; then, the effects of phenology, the swelling time of axillary buds (ABs), and medium of embryogenic callus induction were studied. Plantlets were obtained through somatic embryogenesis. Flow cytometry, inter-simple sequence repeat (ISSR molecular marker) and chromosome karyotype analysis were used to study the genetic stability of regenerated plants along with budding seedlings (BSs) and secondary somatic embryo seedlings (SSESs) as the control. The results show that the rubber tree's phenology period was mature, and the axillary bud induction rate was the highest in the 2 mg/L 6-benzyladenine (6-BA) medium (up to 85.83%). Later, 3-day-old swelling axillary buds were used as explants for callogenesis and somatic embryogenesis. The callus induction rate was optimum in MH (Medium in Hevea) + 1.5 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) + 1.5 mg/L 1-naphthalene acetic acid (NAA) + 1.5 mg/L Kinetin (KT) + 70 g/L sucrose (56.55%). The regenerated plants were obtained after the 175-day culture of explants through callus induction, embryogenic callus induction, somatic embryo development, and plant regeneration. Compared with the secondary somatic embryo seedling control, axillary bud regeneration plants (ABRPs) were normal diploid plants at the cellular and molecular level, with a variation rate of 7.74%.
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Affiliation(s)
- Taihua Wang
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Jinu Udayabhanu
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
- Haikou Key Laboratory of Innovation of Seedlings of Tropical Plants, Haikou 571101, China
| | - Xiaochuan Gu
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
- Haikou Key Laboratory of Innovation of Seedlings of Tropical Plants, Haikou 571101, China
| | - Rizhi Wu
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
- Haikou Key Laboratory of Innovation of Seedlings of Tropical Plants, Haikou 571101, China
| | - Shichao Xin
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
- Haikou Key Laboratory of Innovation of Seedlings of Tropical Plants, Haikou 571101, China
| | - Qiuhui Chen
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
| | - Yuanyuan Zhang
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
| | - Xianfeng Yang
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
- Haikou Key Laboratory of Innovation of Seedlings of Tropical Plants, Haikou 571101, China
| | - Suna Peng
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
- Haikou Key Laboratory of Innovation of Seedlings of Tropical Plants, Haikou 571101, China
| | - Jianmiao Chen
- Hainan Yazhou Bay Seed Laboratory, Sanya Nanfan Research Institute, Hainan University, Sanya 572025, China
- College of Tropical Crops, Hainan University, Haikou 570228, China
| | - Tiandai Huang
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Science, Haikou 571101, China
- Haikou Key Laboratory of Innovation of Seedlings of Tropical Plants, Haikou 571101, China
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Xu S, Liu W, Liu X, Qin C, He L, Wang P, Kong L, Chen X, Liu Z, Ma W. DUS evaluation of nine intersubgeneric hybrids of Paeonia lactiflora and fingerprint analysis of the chemical components in the roots. Front Chem 2023; 11:1158727. [PMID: 36970400 PMCID: PMC10038168 DOI: 10.3389/fchem.2023.1158727] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Accepted: 02/27/2023] [Indexed: 03/12/2023] Open
Abstract
Intersubgeneric hybrids of Paeonia lactiflora (Paeonia lactiflora pall., P. lactiflora.) cover a huge variety of systems in the genus Paeonia. In recent years, many studies have confirmed that the intersubgeneric hybrids of P. lactiflora. are rich in paeoniflorin and other medicinal ingredients, however, it has always proved difficult to clarify the medicinal value of the hybrids and whether they can be used for medicinal purposes. In this study, the consistency of the plant population was evaluated through DUS evaluation, in order to clarify whether the selected research materials had stability and consistency within the population and specificity between populations. The differences between the paeoniflorin contents in the roots of the nine intersubgeneric hybrids of the P. lactiflora. varieties and two medicinal varieties were critically compared. The differences in the chemical components of the roots of nine intersubgeneric hybrids of P. lactiflora. and reference medicine substances of P. lactiflora. and Paeonia anomala subsp. veitchii (Lynch) D. Y. Hong and K. Y. Pan (Paeonia veitchii Lynch., P. veitchii.) were explored via stoichiometric and chemical fingerprint high performance liquid chromatography analyses. The results showed that there were significant differences in the chemical compositions between the intersubgeneric hybrids of P. lactiflora. and the medicinal reference materials, and the contents of paeoniflorin were elevated such that the hybrids could be used as the raw material for extraction of paeoniflorin, thus providing an opportunity to explore the medicinal value of the hybrids. This study explored the key differential components among the varieties and provides a reference and basis for the study of the medicinal value and the identification of the intersubgeneric hybrids of the P. lactiflora. varieties.
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Affiliation(s)
- Shiyi Xu
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
- Experimental Training Center, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Weili Liu
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
- Experimental Training Center, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Xiubo Liu
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
- Jiamusi College, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Chen Qin
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Lianqing He
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Panpan Wang
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Lingyang Kong
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Xi Chen
- Harbin Academy of Agricultural Sciences, Harbin, China
| | - Zhiyang Liu
- Harbin Academy of Agricultural Sciences, Harbin, China
- *Correspondence: Zhiyang Liu, ; Wei Ma,
| | - Wei Ma
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
- Experimental Training Center, Heilongjiang University of Chinese Medicine, Harbin, China
- *Correspondence: Zhiyang Liu, ; Wei Ma,
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