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Senescence plays a critical role in the development and progression of various diseases. This study introduces an amorphous, high-entropy alloy (HEA)-based nanozyme designed to combat senescence. By adjusting the nanozyme's composition and surface properties, this work analyzes its catalytic performance under both normal and aging conditions, confirming that peroxide and superoxide dismutase (SOD) activity are crucial for its anti-aging therapeutic function. Subsequently, the chiral-dependent therapeutic effect is validated and the senolytic performance of D-handed PtPd2CuFe across several aging models is confirmed. Through multi-Omics analyses, this work explores the mechanism underlying the senolytic action exerted by nanozyme in depth. It is confirm that exposure to senescent conditions leads to the enrichment of copper and iron atoms in their lower oxidation states, disrupting the iron-thiol cluster in mitochondria and lipoic acid transferase, as well as oxidizing unsaturated fatty acids, triggering a cascade of cuproptosis and ferroptosis. Additionally, the concentration-dependent anti-aging effects of nanozyme is validated. Even an ultralow dose, the therapeutic can still act as a senomorphic, reducing the effects of senescence. Given its broad-spectrum action and concentration-adjustable anti-aging potential, this work confirms the remarkable therapeutic capability of D-handed PtPd2CuFe in managing atherosclerosis, a disease involving various types of senescent cells.
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Aterosclerosis , Aterosclerosis/tratamiento farmacológico , Aterosclerosis/metabolismo , Humanos , Animales , Ratones , Cobre/química , Cobre/farmacología , Aleaciones/química , Aleaciones/farmacología , Hierro/química , Superóxido Dismutasa/metabolismo , Senescencia Celular/efectos de los fármacos , Ferroptosis/efectos de los fármacosRESUMEN
Aqueous zinc-ion batteries (AZIBs) have attracted significant attention owing to their inherent security, low cost, abundant zinc (Zn) resources and high energy density. Nevertheless, the growth of zinc dendrites and side reactions on the surface of Zn anodes during repeatedly plating/stripping shorten the cycle life of AZIBs. Herein, a simple organic molecule with abundant polar functional groups, 2,2,2-trifluoroether formate (TF), has been proposed as a high-efficient additive in the ZnSO4 electrolyte to suppress the growth of Zn dendrites and side reaction during cycling. It is found that TF molecules can infiltrate the solvated sheath layer of the hydrated Zn2+ to reduce the number of highly chemically active H2O molecules owing to their strong binding energy with Zn2+. Simultaneously, TF molecules can preferentially adsorb onto the Zn surface, guiding the uniform deposition of Zn2+ along the crystalline surface of Zn(002). This dual action significantly inhibits the formation of Zn dendrites and side reactions, thus greatly extending the cycling life of the batteries. Accordingly, the Zn//Cu asymmetric cell with 2 % TF exhibits stable cycling for more than 3,800 cycles, achieving an excellent average Columbic efficiency (CE) of 99.81 % at 2 mA cm-2/1 mAh cm-2. Meanwhile, the Zn||Zn symmetric cell with 2 % TF demonstrates a superlong cycle life exceeding 3,800 h and 2,400 h at 2 mA cm-2/1 mAh cm-2 and 5 mA cm-2/2.5 mAh cm-2, respectively. Simultaneously, the Zn//VO2 full cell with 2 % TF possesses high initial capacity (276.8 mAh/g) and capacity retention (72.5 %) at 5 A/g after 500 cycles. This investigation provides new insights into stabilizing Zn metal anodes for AZIBs through the co-regulation of Zn2+ solvated structure and surface crystallography.
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BACKGROUND: Adipose c-Jun NH2-terminal kinase 1/2 (JNK1/2) is a central mediator involved in the development of obesity and its complications. However, the roles of adipose JNK1/2 in hypertension remain elusive. Here we explored the role of adipose JNK1/2 in hypertension. METHODS AND RESULTS: The roles of adipose JNK1/2 in hypertension were investigated by evaluating the impact of adipose JNK1/2 inactivation in both angiotensin II (Ang II)-induced and deoxycorticosterone acetate (DOCA) salt-induced hypertensive mice. Specific inactivation of JNK1/2 in adipocytes significantly alleviates Ang II-induced and DOCA salt-induced hypertension and target organ damage in mice. Interestingly, such beneficial effects are also observed in hypertensive mice after oral administration of JNK1/2 inhibitor SP600125. Mechanistically, adipose JNK1/2 acts on adipocytes to reduce the production of adiponectin (APN), then leads to promote serum and glucocorticoid-regulated kinase 1 (SGK1) phosphorylation and increases epithelial Na + channel α-subunit (ENaCα) expression in both renal cells and adipocytes, respectively, finally exacerbates Na + retention. In addition, chronic treatment of recombinant mouse APN significantly augments the beneficial effects of adipose JNK1/2 inactivation in DOCA salt-induced hypertension. By contrast, the blood pressure-lowering effects of adipose JNK1/2 inactivation are abrogated by adenovirus-mediated SGK1 overexpression in Ang II -treated adipose JNK1/2 inactivation mice. CONCLUSION: Adipose JNK1/2 promotes hypertension and targets organ impairment via fine-tuning the multiorgan crosstalk among adipose tissue, kidney, and blood vessels.
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Acetato de Desoxicorticosterona , Hipertensión , Ratones , Animales , Angiotensina II/farmacología , Adiponectina , Acetato de Desoxicorticosterona/efectos adversos , Desoxicorticosterona/efectos adversos , Presión Sanguínea , Obesidad , Acetatos/efectos adversosRESUMEN
INTRODUCTION: Panuveitis is a serious inflammatory disease. Setae are fibers produced by many insects and plants. Many case reports have described caterpillar and spider fibers entering the eye. These hairs are covered with tiny barbs that help them enter and migrate into the eye tissue, leading to severe inflammation. Normally, they are buried mainly in the conjunctiva and cornea. However, in the present case, they entered the posterior segment of the eye, which is very rare. CASE DESCRIPTION: A female patient presented with a complaint of repeated foreign body sensation, redness, pain, and photophobia in the left eye for 9 years following initial exposure to caterpillars. She visited the doctor in January after aggravation of symptoms. Slit-lamp examination, ultrasound biomicroscopy, ultrasound B-scan, fluorescein angiography, and indocyanine green angiography revealed the presence of a foreign body in the vitreous, which caused discomfort in the patient's left eye and subsequently, panuveitis of the left eye. The symptoms improved significantly after foreign body removal using vitrectomy. Microscopic examination revealed that the foreign body was caterpillar setae. CONCLUSION: Clinicians should be more vigilant about history of contact with caterpillars while examining uveitis that has recurred for many years. Identification of the root cause of the disease can ensure better treatment.
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Cuerpos Extraños en el Ojo , Lepidópteros , Panuveítis , Uveítis , Animales , Femenino , Humanos , Sensilos , Cuerpos Extraños en el Ojo/diagnóstico , Cuerpos Extraños en el Ojo/etiología , Cuerpos Extraños en el Ojo/cirugía , Panuveítis/diagnóstico , Panuveítis/etiología , Uveítis/complicaciones , CórneaRESUMEN
BACKGROUND: Tumor cells with the capability of radiation resistance can escape the fate of cell death after radiotherapy, serving as the main cause of treatment failure. Repopulation of tumors after radiotherapy is dominated by this group of residual cells, which greatly reduce the sensitivity of recurrent tumors to the therapy, resulting in poor clinical outcomes. Therefore, revealing the mechanism of radiation resistant cells participating in tumor repopulation is of vital importance for cancer patients to obtain a better prognosis. METHODS: Co-expressed genes were searched by using genetic data of radiation resistant cells (from GEO database) and TCGA colorectal cancer. Univariate and multivariate Cox regression analysis were performed to define the most significant co-expressed genes for establishing prognostic indicator. Logistic analysis, WGCNA analysis, and other types of tumors were included to verify the predictive ability of the indicator. RT-qPCR was carried out to test expression level of key genes in colorectal cancer cell lines. Colongenic assay was utilized to test the radio-sensitivity and repopulation ability of key gene knockdown cells. RESULTS: Prognostic indicator based on TCGA colorectal cancer patients containing four key radiation resistance genes (LGR5, KCNN4, TNS4, CENPH) was established. The indicator was shown to be significantly correlated with the prognosis of colorectal cancer patients undergoing radiotherapy, and also had an acceptable predictive effect in the other five types of cancer. RT-qPCR showed that expression level of key genes was basically consistent with the radiation resistance level of colorectal cancer cells. The clonogenic ability of all key gene knockdown cells decreased after radiation treatment compared with the control groups. CONCLUSIONS: Our data suggest that LGR5, KCNN4, TNS4 and CENPH are correlated with radiation sensitivity of colorectal cancer cells, and the indicator composed by them can reflect the prognosis of colorectal cancer patients undergoing radiation therapy. Our data provide an evidence of radiation resistant tumor cells involved in tumor repopulation, and give patients undergoing radiotherapy an approving prognostic indicator with regard to tumor progression.
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Neoplasias Colorrectales , Tolerancia a Radiación , Humanos , Pronóstico , Tolerancia a Radiación/genética , Línea Celular Tumoral , Muerte Celular , Neoplasias Colorrectales/genética , Neoplasias Colorrectales/radioterapia , Neoplasias Colorrectales/metabolismoRESUMEN
Repopulation of residual tumor cells impedes curative radiotherapy, yet the mechanism is not fully understood. It is recently appreciated that cancer cells adopt a transient persistence to survive the stress of chemo- or targeted therapy and facilitate eventual relapse. Here, it is shown that cancer cells likewise enter a "radiation-tolerant persister" (RTP) state to evade radiation pressure in vitro and in vivo. RTP cells are characterized by enlarged cell size with complex karyotype, activated type I interferon pathway and two gene patterns represented by CST3 and SNCG. RTP cells have the potential to regenerate progenies via viral budding-like division, and type I interferon-mediated antiviral signaling impaired progeny production. Depleting CST3 or SNCG does not attenuate the formation of RTP cells, but can suppress RTP cells budding with impaired tumor repopulation. Interestingly, progeny cells produced by RTP cells actively lose their aberrant chromosomal fragments and gradually recover back to a chromosomal constitution similar to their unirradiated parental cells. Collectively, this study reveals a novel mechanism of tumor repopulation, i.e., cancer cell populations employ a reversible radiation-persistence by poly- and de-polyploidization to survive radiotherapy and repopulate the tumor, providing a new therapeutic concept to improve outcome of patients receiving radiotherapy.
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Neoplasias , Humanos , Línea Celular Tumoral , Neoplasias/radioterapiaRESUMEN
BACKGROUND: The purpose of this study is to study the effect of repeated intravitreal injection of anti-vascular endothelial growth factor (anti-VEGF) drugs on vitreomacular interface. METHODS: Neovascular age-related macular degeneration patients who received intravitreal injections of anti-VEGF drugs were included. Eyes with severe vitreous opacity, uveitis, complicated cataract surgery and previous vitrectomy were excluded. Vitreomacular interface, best corrected visual acuity (BCVA) and central retinal thickness (CRT) assessment were performed once a month for at least 3 months. The nature and time of the change event are recorded. Groups were divided according to whether vitreomacular interface change events occurred. To analyse the risk factors of vitreomacular interface changes and their influence on treatment effect. RESULTS: A total of 87 eyes were evaluated. Vitreomacular interface change event occurred in 9 eyes. Pre-existing vitreomacular interface abnormality (VMIA) was a risk factor for the VMI change (P = 0.033, OR = 16.518, 95% CI: 1.258 to 216.939). 60% of interface events occurred in the first 3 months of treatment. The final BCVA of eyes with vitreomacular interface unchanged was significantly higher than that at baseline (P = 0.001), and the final CRT was also significantly lower than that at baseline (P < 0.001). The final CRT of eyes vitreomacular interface changed was significantly lower than that at baseline (P = 0.015), however, there was no statistical significance in BCVA (P = 0.468). CONCLUSION: Intravitreal injection of anti-VEGF drugs has a certain probability to cause changes in the vitreomacular interface, and the risk is higher in eyes with pre-existing vitreomacular interface abnormality. The effect of intravitreal injections on the vitreomacular interface was concentrated in the first three injections, and subsequent increases in the number of injections did not significantly increase the risk of vitreomacular interface abnormality. Ophthalmologists should increase attention to the vitreomacular interface in the early stages of anti-VEGF therapy and counsel patients accordingly.
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Inhibidores de la Angiogénesis , Degeneración Macular , Humanos , Inyecciones Intravítreas , Inhibidores de la Angiogénesis/uso terapéutico , Cuerpo Vítreo , Agudeza Visual , Factor A de Crecimiento Endotelial Vascular , Tomografía de Coherencia Óptica , Degeneración Macular/tratamiento farmacológico , Ranibizumab , Resultado del TratamientoRESUMEN
Growing pieces of evidence suggest that Alzheimer's disease (AD) is interlinked with Type 2 diabetes mellitus (DM), which has been described as "type 3 DM". In this study, we investigate the neuronal insult attributable to advanced glycation end products (AGEs) as the models of DM-related AD to understand the effects exerted by calycosin on neurodegenerative changes both in vivo and in vitro studies and also studied the associated molecular mechanisms. The results reported herein revealed that the viability of the PC12 cells induced by AGEs increased when treated with calycosin. It was also observed that the learning and memory abilities of AGE-induced DM-related AD rats improved under these conditions. Analysis of the reported results indicates that calycosin can effectively down-regulate the activity of GSK-3ß to result in the reversal of the process of tau hyperphosphorylation, inhibit the expression of RAGE and BACE-1 proteins, resulting in a decrease in the production of ß-amyloid and regulate the PGC-1α/TFAM signaling pathway to repair mitochondrial dysfunction. It can be inferred that calycosin can potentially exhibit important therapeutic properties that can be exploited during the treatment of AD, especially DM-related AD.
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Enfermedad de Alzheimer , Diabetes Mellitus Tipo 2 , Animales , Ratas , Enfermedad de Alzheimer/tratamiento farmacológico , Enfermedad de Alzheimer/metabolismo , Productos Finales de Glicación Avanzada/metabolismo , Glucógeno Sintasa Quinasa 3 beta , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Péptidos beta-Amiloides/metabolismo , Proteínas tau/metabolismoRESUMEN
Introduction Previous studies have reported a high prevalence of visual defects in children with special needs. However, routine ocular examinations for these children in rural areas of China are lacking. This study aimed to evaluate the status of visual impairment (VI) in children at special education schools in rural China. Methods A total of 316 students from two special schools in Zunyi city, Guizhou province, were enrolled. Full ophthalmic examinations were performed, and gene-sequencing services were offered to potential patients. Results The mean age of the 316 participants was 12.27±3.49 years, and 75 showed abnormal ophthalmic manifestations on slit-lamp examination. Visual acuity (VA) was assessed in 232 eyes, and the mean VA (logarithm of the minimum angle of resolution, logMAR) was 0.27±0.34. Whole-exome sequencing (WES) identified 19 mutations in these children, which might explain their visual complaints. Children with Down syndrome had a significantly higher prevalence of ocular disorders than those without. Conclusion VI is common among children at special education schools in rural areas; however, routine screening and effective interventions have not been consistently implemented. Efforts should be made to address this issue in these already disadvantaged children.
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Nanoporous carbons (NPCs) are ideal materials for the dry process of flue gas desulfurization (FGD) due to their rich pore structure and high specific surface area. To study the effect of edge-functionalized NPCs on the physisorption mechanism of sulfur dioxide, different functional groups were embedded at the edge of NPCs, and the physisorption behavior was simulated using the grand canonical Monte Carlo method (GCMC) combined with density functional theory (DFT). The results indicated that the insertion of acidic oxygenous groups or basic nitrogenous groups into NPCs could enhance the physisorption of SO2. The influence of edge functionalization on the pore structure of NPCs is also analyzed. To further explore the interaction in the adsorption process, the van der Waals (vdW) interaction and electrostatic interaction between the SO2 molecule and the basic structural unit (BSU) were investigated. Simulated results showed that edge functionalization had limited influence on vdW interaction and did not significantly change the distribution characteristics of vdW interaction. According to the study on electrostatic interaction, edge functionalization was found to promote inhomogeneity of the surface charge of the adsorbent, enhance the polarity of the adsorbent, and thus enhance the physisorption capacity of SO2. More importantly, we provide an idea for studying the difference in adsorption capacity caused by different functional groups connected to carbon adsorbents.
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Polyploidy is a conserved mechanism in cell development and stress responses. Multiple stresses of treatment, including radiation and chemotherapy drugs, can induce the polyploidization of tumor cells. Through endoreplication or cell fusion, diploid tumor cells convert into giant tumor cells with single large nuclei or multiple small nucleuses. Some of the stress-induced colossal cells, which were previously thought to be senescent and have no ability to proliferate, can escape the fate of death by a special way. They can remain alive at least before producing progeny cells through asymmetric cell division, a depolyploidization way named neosis. Those large and danger cells are recognized as polyploid giant cancer cells (PGCCs). Such cells are under suspicion of being highly related to tumor recurrence and metastasis after treatment and can bring new targets for cancer therapy. However, differences in formation mechanisms between PGCCs and well-accepted polyploid cancer cells are largely unknown. In this review, the methods used in different studies to induce polyploid cells are summarized, and several mechanisms of polyploidization are demonstrated. Besides, we discuss some characteristics related to the poor prognosis caused by PGCCs in order to provide readers with a more comprehensive understanding of these huge cells.
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Tumor repopulation during cycles of radiotherapy limits the radio-response in ensuing cycles and causes failure of treatment. It is thus of vital importance to unveil the mechanisms underlying tumor repopulating cells. Increasing evidence suggests that a subpopulation of drug-tolerant persister cancer cells (DTPs) could survive the cytotoxic treatment and resume to propagate. Whether these persister cells contribute to development of radio-resistance remains elusive. Based on the genetic profiling of DTPs by integrating datasets from Gene Expression Omnibus database, this study aimed to provide novel insights into tumor-repopulation mediated radio-resistance and identify predictive biomarkers for radio-response in clinic. A prognostic risk index, grounded on four persister genes (LYNX1, SYNPO, GADD45B, and PDLIM1), was constructed in non-small-cell lung cancer patients from The Cancer Genome Atlas Program (TCGA) using stepwise Cox regression analysis. Weighted gene co-expression network analysis further confirmed the interaction among persister-gene based risk score, radio-response and overall survival time. In addition, the predictive role of risk index was validated in vitro and in other types of TCGA patients. Gene set enrichment analysis was performed to decipher the possible biological signaling, which indicated that two forces behind persister cells, stress response and survival adaptation, might fuel the tumor repopulation after radiation. Targeting these persister cells may represent a new prognostic and therapeutic approach to enhance radio-response and prevent radio-resistance induced by tumor repopulation.
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Radiotherapy is an effective treatment for non-small cell lung cancer (NSCLC). However, irradiated, dying tumor cells generate potent growth stimulatory signals during radiotherapy that promote the repopulation of adjacent surviving tumor cells to cause tumor recurrence. We investigated the function of caspase-3 in NSCLC repopulation after radiotherapy. We found that radiotherapy induced a DNA damage response (DDR), activated caspase-3, and promoted tumor repopulation in NSCLC cells. Unexpectedly, caspase-3 knockout attenuated the ataxia-telangiectasia mutated (ATM)/p53-initiated DDR by decreasing nuclear migration of endonuclease G (EndoG), thereby reducing the growth-promoting effect of irradiated, dying tumor cells. We also identified p53 as a regulator of the Cox-2/PGE2 axis and its involvement in caspase-3-induced tumor repopulation after radiotherapy. In addition, injection of caspase-3 knockout NSCLC cells impaired tumor growth in a nude mouse model. Our findings reveal that caspase-3 promotes tumor repopulation in NSCLC cells by activating DDR and the downstream Cox-2/PGE2 axis. Thus, caspase-3-induced ATM/p53/Cox-2/PGE2 signaling pathway could provide potential therapeutic targets to reduce NSCLC recurrence after radiotherapy.
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Carcinoma de Pulmón de Células no Pequeñas/patología , Caspasa 3/metabolismo , Neoplasias Pulmonares/patología , Radiación Ionizante , Animales , Proteínas de la Ataxia Telangiectasia Mutada/metabolismo , Carcinoma de Pulmón de Células no Pequeñas/metabolismo , Línea Celular Tumoral , Ciclooxigenasa 2/metabolismo , Daño del ADN/fisiología , Daño del ADN/efectos de la radiación , Dinoprostona/metabolismo , Técnicas de Inactivación de Genes , Xenoinjertos , Humanos , Neoplasias Pulmonares/metabolismo , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , Transducción de Señal/fisiología , Transducción de Señal/efectos de la radiación , Proteína p53 Supresora de Tumor/metabolismoRESUMEN
Previous studies have showed that bile acids (BAs) play essential roles in the progression of various human cancers, and the G-protein coupled bile acid receptor-1 (Gpbar-1, or TGR5), a receptor of BAs, has been reported to connect BAs with cancers. However, little is known about the prognostic role of TGR5 in pancreatic cancer. In this study, we found that the expression of TGR5 was significantly higher in the cancerous tissues than the adjacent normal tissues by immunohistochemical staining (81.6% vs. 36.8%). Meanwhile, TGR5 was positively correlated with lymph node metastasis (P=0.021) and advanced stage (P=0.011). Finally, univariate analysis showed that patients with high TGR5 expression (P<0.001), lymph node metastasis (P=0.002) and advanced tumor stage (P=0.008) had decreased overall survival, and Cox proportional hazards regression analysis confirmed that TGR5 expression was an independent predictor of the overall survival of patients with pancreatic cancer (P=0.019). Our findings suggested that TGR5 might serve as an important predictor of poor survival in pancreatic cancer.
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In this work, we report a successful synthesis of copper bismuth sulfide nanorods (NRs) with broad and strong photoabsorption ranging from ultraviolet (UV) to near-infrared (NIR) wavelengths, which can be used as a 1064 nm-laser-driven photothermal agent with the photothermal conversion efficiency of 40.7%, noticeably higher than most of the reported PTT agents working in NIR-II window. The as-prepared PEGylated Cu3BiS3 NRs were used as photoacoustic imaging (PAI) and CT imaging agents due to their strong NIR absorption and large X-ray attenuation coefficient of bismuth. We are the first to demonstrate that a small quantity of PEGylated Cu3BiS3 NRs in tumors can concentrate radiation energy and trigger mild PTT under NIR-II irradiation and thus, these particles could be used as a novel, synergistic thermoradiotheraputic agent that enhances the efficacy of radiotherapy.
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Terapia Combinada/métodos , Hipertermia Inducida/métodos , Nanopartículas del Metal/uso terapéutico , Nanotubos/química , Neoplasias Experimentales/terapia , Fotoquimioterapia/métodos , Polietilenglicoles/química , Absorción de Radiación , Animales , Línea Celular Tumoral , Rayos Infrarrojos/uso terapéutico , Nanopartículas del Metal/química , Nanopartículas del Metal/ultraestructura , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , Neoplasias Experimentales/patología , Fármacos Fotosensibilizantes/uso terapéutico , Semiconductores , Resultado del TratamientoRESUMEN
OBJECTIVE: To compare the effects between moxibustion and inflammation therapy apparatus for patella tendinopathy of athlete. METHODS: Eighty patients were randomly assigned into a moxibustion group and a naturopathy group, 40 cases in each one. According to conditions,moxibustion was applied at the pain points of the terminal patellar tendon, Dubi (ST 35), Zusanli (ST 36), Yanglingquan (GB 34), Liangqiu (ST 34) and Xuehai (SP 10), etc., once a day and 30 min a time. Besides, exercise prescription was used, including ice compress, pull relaxation and targeted common strength exercise, etc. While in the naturopathy group, the microwave probe of inflammation therapy apparatus was aimed at the pain points of the terminal patellar tendon, once a day and 20 min a time. Also, the same exercise prescription was implemented as the moxibustion group. Seven treatments were taken as a course and 2 courses were required. Visual analogue scale (VAS) for knee joint pain and clinical effects were observed. RESULTS: After treatment, the VAS scores decreased compared with those before treatment in the two groups (both P<0.01),with more apparent one in the moxibustion group (P<0.05). The total effective rate of the moxibustion group was 97.5%(39/40), which was better than 82.5% (33/40) of the naturopathy group (P<0.05). CONCLUSIONS: Moxibustion combined with exercise prescription can effectively improve the pain induced by patella tendinopathy of the athletes, which is better than inflammation therapy apparatus.