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Table 7 Various plant extracts and precursor salts explored to synthesize metallic NPs for their cervical cancer applications

From: Biogenic metallic nanoparticles as game-changers in targeted cancer therapy: recent innovations and prospects

Plant used

Metal precursor

Morphology

Cell line

Techniques used

IC50 value

Impact

References

Silver

Nepeta deflersiana aerial part

Silver nitrate

Spherical

33 nm

HeLa cells

MTT assay, Neutral red uptake assay, DCFH-DA, rhodamine-123

5 μg/mL

ND-Ag NPs have the capacity of inducing apoptosis and necrosis cell death of HeLA cells through SubG1 cell cycle arrest

[260]

Moringa olifera stem bark extract

Silver nitrate

Spherical

40 nm

HeLa cells

Annexin V/PI double-staining assay NRU, DCFH-DA, DAPI staining

–

The increased level of ROS revealed that most of the cells underwent induction of early apoptosis caused by oxidative stress, while many of the inhibitors that induce apoptosis show antioxidant activity

[261]

Detarium microcarpum leaf extract

Silver nitrate

Spherical/rectangular

81 nm–84 nm

HeLa cells

Presto blue cell viability assay

31.5 µg/mL

The synthesized NPs had inhibitory effect on cervical cancer cells

[262]

Gold

Catharanthus roseus leaf extract

HAuCl4

Spherical

25–35 nm

HeLa3T3 cell lines

MTT assay, AO/EtBr staining, DCFH-DA staining, Rhodamine 123

Caspases activity assay, Western blotting

5 µg/mL

The cytotoxicity and apoptosis of human cervical carcinoma (HeLa) cells increased

Caspase-3 was cleaved after being exposed Biosynthesized NPs for 24 h

[255]

Pongamia pinnata leaf extract

HAuCl4

Spherical

55 nm

HeLa cells

Human embryonic kidney cell line: HEK293

MTT assay, Flow cytometry, Rhodamine 123, Wound healing/cell migration assay

200 µg/mL

Au NPs gets internalized into HeLa cells by endocytosis. Inside the cytosol, it exhibited cytotoxic effect by elevating intracellular ROS, perturbing the MMP, arresting cells at S-phase of the cell cycle and finally inducing cell death by apoptosis

[263]

Copper oxide

Brassica oleracea var acephala leaf extract

Copper sulfate

Spherical

60–100 nm

HeLa cells

MTT assay

119.0805 μg/mL

The vitality of cancer cells declines as sample concentration rises, whereas cytotoxicity against HeLa cell lines rises as sample concentration rises

[264]

Phaseolus vulgaris

Copper sulfate

Spherical, hexagonal

26.6 nm

HeLa

SRB assay, Hoechst 33,258 staining, DCFH-DA, Clonogenic assay

0.5 and 1 µg/mL

In a dose-dependent manner Induced intracellular ROS generation

[259]

Houttuynia cordata

Copper sulfate

Spherical

40–45 nm

HeLa

MTT assay, DCFH-DA, EtBr/AO staining, DAPI staining, Pi stainin, Q-RT-PCR

5 µg/mL

Biosynthesized NPs inhibited cell proliferation and promoted apoptosis by targeting PI3K/Akt signaling pathways in HeLa cells

[265]

Titanium oxide

Coleus aromaticus leaf extract

TiO2

Hexagonal shape

12–33 nm

HeLa

MTT assay

34.45 µg/mL

Increased oxidative stress, destroyed the cell membrane, enhanced lipid peroxidation, lowered the level of glutathione (GSH), and eventually contributed to cells’ death

[266]