OBJECTIVETo investigate the effects of dexmedetomidine on renal microcirculatory perfusion in rabbits with renal ischemia/reperfusion (I/R) injury rabbit by quantitative analysis of contrast-enhanced ultrasound (CEUS).

METHODSTwenty- four New Zealand rabbits were randomly divided into 3 groups (8 in each), including a control group, renal I/R injury group and dexmedetomidine group. In the latter two groups, the right kidney of the rabbits was resected and I/R injury was induced in the left kidney. In dexmedetomidine group, the rabbits received an intraperitoneal dose of 10 µg/kg dexmedetomidine 30 min before renal ischemia, and 24 h after reperfusion, the renal size and renal artery resistance (RI) were measured, and renal cortex perfusion was observed by CEUS. The time-to-peak intensity (TTP), peak signal intensity (PSI), gradient between start frame to peak frame (Grad) and area under the curve (AUC) were quantitatively analyzed using the time-intensity curves. Pathological changes of the kidney were also observed.

RESULTSCompared with the control group, the rabbits in I/R and dexmedetomidine groups showed distinct changes of the renal size with obvious renal pathologies. RI, PPT and AUC all increased, and PSI and Grad decreased significantly in I/R and dexmedetomidine groups (P<0.05). Compared with I/R group, obvious improvement of the renal size and renal pathologies were observed in dexmedetomidine group, which showed significantly decreased RI, PPT and AUC and increased PSI and Grad (P<0.05).

CONCLUSIONCEUS combined with the time-intensity curve parameters allows quantitative and dynamic analysis of the protective effects of dexmedetomidine on microcirculatory perfusion in rabbits with renal I/R injury.

Animals ; Dexmedetomidine ; pharmacology ; Disease Models, Animal ; Kidney ; blood supply ; drug effects ; Kidney Diseases ; drug therapy ; Microcirculation ; drug effects ; Rabbits ; Renal Artery ; drug effects ; Reperfusion Injury ; drug therapy

Tonifying herbs and evil expelling herbs of traditional Chinese medicine (TCM) for chronic kidney diseases in molecular level were studied by computer aided drug design, including analysis of molecular similarity, predictive ADME simulation and predictive toxic simulation. It was found that this technology could distinguish the structure diversity of compounds from TCM, and screen the lead compounds rapidly.
Chronic Disease ; therapy ; Drugs, Chinese Herbal ; adverse effects ; chemistry ; pharmacology ; Humans ; Kidney Diseases ; drug therapy

To study the characteristics of pharmacological effects of property combinations of traditional Chinese medicines (TCMs) distributing in the stomach meridian based on medicinal property combination, in order to further define the association relationship between properties of TCMs and their pharmacological effects, and build a bridge for the interpenetration and combination between the medicinal property theory of TCMs and their pharmacological effects. On the basis of the studies on the medicinal property theory of TCMs distributing along the kidney meridian and their pharmacological effects, efforts were made to collect relevant data for medicinal properties and pharmacological effects and mine the characteristics of pharmacological effects that were corresponding to relevant medicinal property combination by processing materials related to medicinal properties and pharmacological effects with the association rules method. According to the analysis, TCMs distributing along the kidney meridian with different medicinal property combinations were significantly differentiated in the pharmacological effects, but shared identical pharmacological effects, such as immunological enhancement. In this study, TCMs distributing along the kidney meridian with different medicinal property combinations were taken as the carriers to closely integrate the traditional Chinese medicine theory with the modem study achievements, lay a solid foundation for further developing and enriching the traditional Chinese medical property theory, while providing a new perspective on the development of modem medicine.
Databases, Factual ; Drugs, Chinese Herbal ; chemistry ; therapeutic use ; Humans ; Kidney ; drug effects ; Kidney Diseases ; drug therapy ; Meridians

The purpose of the present study was to determine the role of inositol 1,4,5-trisphosphate receptor 3 (IP₃R3) in renal cyst development in autosomal dominant polycystic kidney disease (ADPKD). 2-aminoethoxy-diphenyl borate (2-APB) and shRNA were used to suppress the expression of IP₃R3. The effect of IP₃R3 on cyst growth was investigated in Madin-Darby canine kidney (MDCK) cyst model, embryonic kidney cyst model and kidney specific Pkd1 knockout (PKD) mouse model. The underlying mechanism of IP₃R3 in promoting renal cyst development was investigated by Western blot and immunofluorescence staining. The results showed that the expression level of IP₃R3 was significantly increased in the kidneys of PKD mice. Inhibiting IP₃R3 by 2-APB or shRNA significantly retarded cyst expansion in MDCK cyst model and embryonic kidney cyst model. Western blot and immunofluorescence staining results showed that hyperactivated cAMP-PKA signaling pathway in the growth process of ADPKD cyst promoted the expression of IP₃R3, which was accompanied by a subcellular redistribution process in which IP₃R3 was translocated from endoplasmic reticulum to intercellular junction. The abnormal expression and subcellular localization of IP₃R3 further promoted cyst epithelial cell proliferation by activating MAPK and mTOR signaling pathways and accelerating cell cycle. These results suggest that the expression and subcellular distribution of IP₃R3 are involved in promoting renal cyst development, which implies IP₃R3 as a potential therapeutic target of ADPKD.
Animals ; Dogs ; Mice ; Cysts/genetics* ; Inositol 1,4,5-Trisphosphate Receptors/pharmacology* ; Kidney/metabolism* ; Polycystic Kidney Diseases/metabolism* ; Polycystic Kidney, Autosomal Dominant/drug therapy* ; Madin Darby Canine Kidney Cells

Primary renal lymphoma is a controversial entity and extremely rare disease, possibly due to the fact that the kidney is one of the extranodal organs usually not containing lymphoid tissue. It is unclear if this conditions can be diagnosed preoperatively with imaging studies. In most cases the diagnosis is made after removal or biopsy of a kidney for suspected primary renal tumor or at autopsy. Treatment usually consists of surgery and chemotherapy with or without radiation therapy and the prognosis is poor. We report a case of primary renal lymphoma presenting with fever in a 13-month- old boy who was treated with surgical intervention and combination chemotherapy.
Autopsy ; Biopsy ; Child* ; Diagnosis ; Drug Therapy ; Drug Therapy, Combination ; Fever ; Humans ; Kidney ; Lymphoid Tissue ; Lymphoma* ; Male ; Prognosis ; Rare Diseases

Kidney disease is common in patients with cancer and includes diseases that occur in people without cancer. In addition, certain kidney disorders are related to either cancer therapy or the malignancy itself. Paraneoplastic glomerulonephritis and post-hematopoietic stem-cell transplantation kidney disease (thrombotic microangiopathy, veno-occlusive disease, and kidney injury from graft-versus-host disease) are prime examples. Newer cancer therapy has increased cancer cure rates and survival times, but nephrotoxicity remains an important complication of chemotherapy. Consequently, patients with cancer are at increased risk of developing acute kidney injury, chronic kidney disease, and fluid and electrolyte abnormalities. In patients with chronic kidney disease, therapeutic doses may need to be reduced. Therefore, it is essential that nephrologists be informed and involved in cancer care. Nephrologists must provide expertise in the evaluation and management of acute and chronic kidney disease, fluid and electrolyte disorders, and the use of various extracorporeal therapies in patients with cancer. Additionally, onco-nephrologists, who must be knowledgeable about the array of new chemotherapeutic agents and their potential effects on kidney function, are needed to provide integral care for patients with cancer.
Acute Kidney Injury ; Antineoplastic Agents ; Drug Therapy ; Drug-Related Side Effects and Adverse Reactions ; Glomerulonephritis ; Humans ; Kidney Diseases* ; Kidney* ; Nephrology ; Renal Insufficiency, Chronic

Clear cell sarcoma is a rare malignant soft tissue neoplasm with unknown oringin. It is slow growing tumor , but uncommonly, it shows rapidly progressive course. In Korea, there has been rare case of clear cell sarcoma, especially with systemic metastasis. We herein present a case of clear cell sarcoma rapidly progressing with systemic metastasis. She had a deep seated nodule on left heel and inguinal and abdominal lymphadenopathy at the initial presentation. While chemotherapy, acute renal failure occurred and it was suspicious from abdominal ultrasono that both kidneys were invaded with clear cell sarcoma. She died with repiratory failure.
Acute Kidney Injury ; Drug Therapy ; Heel ; Kidney ; Korea ; Lymphatic Diseases ; Neoplasm Metastasis* ; Sarcoma, Clear Cell* ; Soft Tissue Neoplasms

Renal interstitial fibrosis (RIF) is a common development in chronic renal diseases that can lead to uremia and be life-threatening. The RIF pathology has complicated extracellular and intercellular mechanisms, involving many cells and cytokines, resulting in an incomplete mechanistic understanding of the disease. Finding effective herbs or herbal extracts for prevention and treatment of RIF is crucial because current medical approaches do not reliably slow or reverse RIF. In recent years, many experts have worked to identify herbs or herbal extracts to combat RIF both in vivo and in vitro, with some success. This review attempts to summarize the possible interventional mechanisms of herbs or herbal extracts involved in protecting and reversing RIF. The authors found some herbs and their extracts that may ameliorate renal impairments through anti-inflammation, anti-fibrogenesis and stabilization of extra cellular matrix. Among them, tetramethylpyrazine/ligustrazine, curcumin and polyglucoside of Tripterygium have experimentally shown good potential for improving RIF. However, conclusive evidence is still needed, especially in randomized controlled clinical trials. We expect that herbs or herbal extracts will play an important role in RIF treatment and reversal in the future.
Animals ; Fibrosis ; Humans ; Kidney Diseases ; drug therapy ; Phytotherapy ; Plant Extracts ; therapeutic use

Aconitum ; Drugs, Chinese Herbal ; pharmacology ; therapeutic use ; Humans ; Kidney Diseases ; drug therapy ; Medicine, Chinese Traditional ; Rhizome

Extracellular vesicles (EVs) are lipid bilayer-enclosed structures containing diverse bioactive cargoes that play a major role in intercellular communication in both physiological and pathological conditions. Currently, the field of EV-based therapy has been rapidly growing, and two main therapeutic uses of EVs can be surmised: (i) exploiting stem cell-derived EVs as therapeutic agents; and (ii) employing EVs as natural therapeutic vectors for drug delivery. This review will discuss the recent advances in EV-based therapy in the treatment of renal disease.
Cell Communication ; Drug Delivery Systems ; Extracellular Vesicles ; Humans ; Kidney Diseases/therapy*