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Exosome-associated lysophosphatidic acid signaling contributes to cancer pain.

Pain associated with bone cancer remains poorly managed, and chemotherapeutic drugs used to treat cancer usually increase pain. The discovery of dual-acting drugs that reduce cancer and produce analgesia is an optimal approach. The mechanisms underlying bone cancer pain involve interactions between cancer cells and nociceptive neurons. We demonstrated that fibrosarcoma cells express high levels of autotaxin (ATX), the enzyme synthetizing lysophosphatidic acid (LPA). Lysophosphatidic acid increased proliferation of fibrosarcoma cells in vitro. Lysophosphatidic acid is also a pain-signaling mole…

First-line methadone for cancer pain: titration time analysis.

BACKGROUND: Methadone is a low-cost, strong opioid that is increasingly used as a first-line treatment for pain in palliative care (PC). Its long and unpredictable half-life and slow elimination phase can make titration challenging. Evidence for titration modalities is scarce. OBJECTIVE: To describe the titration phase of the treatment with low-dose first-line methadone and the use of methadone for breakthrough pain. METHODS: Prospective study with strong opioid-naïve patients with moderate to severe cancer pain followed at a tertiary PC unit in Argentina. Starting methadone dose was 2.5-5 m…

Percutaneous cervical cordotomy for cancer-related pain: national data.

OBJECTIVES: Percutaneous cervical cordotomy (PCC) is an interventional ablative procedure in the armamentarium for cancer pain treatment, but there is limited evidence to support its use. This study aimed to assess the effectiveness and safety of PCC. METHODS: Analysis was undertaken of the first national (UK) prospective data repository of adult patients with cancer undergoing PCC for pain treatment. The relationship between pain and other outcomes before and after PCC was examined using appropriate statistical methods. RESULTS: Data on 159 patients' PCCs (performed from 1 January 2012 to 6…

Chronic Non-cancer Pain Management and Addiction: A Review.

The use of opioids in chronic non-cancer pain (CNCP) has been a fast-rising treatment phenomenon in the last two decades. Though opioids are advocated in various chronic pain management guidelines, their use in chronic non-cancer pain still remains controversial as evidence of this approach is still weak. This paper highlights potential adverse effects associated with opioid use in pain management, including an increase in tolerance, dependence, and addiction outcomes. Nonetheless, opioids have an important place in contemporary CNCP management for selected patients. However, pain management m…

Bone Pain in Cancer Patients: Mechanisms and Current Treatment.

The skeletal system is the third most common site for cancer metastases, surpassed only by the lungs and liver. Many tumors, especially those of the breast, prostate, lungs, and kidneys, have a strong predilection to metastasize to bone, which causes pain, hypercalcemia, pathological skeletal fractures, compression of the spinal cord or other nervous structures, decreased mobility, and increased mortality. Metastatic cancer-induced bone pain (CIBP) is a type of chronic pain with unique and complex pathophysiology characterized by nociceptive and neuropathic components. Its treatment should be

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… Management of cancer pain in adult patients: ESMO Clinical Practice Guidelines. Ann. Oncol. 2018;29:166–191. doi: 10.1093/annonc/mdy152. 45. WHO Guidelines for the Pharmacological and Radiotherapeutic Management of Cancer Pain in Adults and Adolescents. … Disease modifying actions of interleukin-6 blockade in a rat model of bone cancer pain. Pain. 2018;159:684–698. doi: 10.1097/j.pain.0000000000001139. …

Matrix stimulation in cancer pain: Methodology, safety and effectiveness.

BackgroundThis feasibility study addresses the applicability of matrix electrodes for the reduction of ongoing pain in cancer patients via low-frequency electrical stimulation (LFS).MethodsLow-frequency matrix stimulation (4 Hz) was applied to the skin within the 'Head's zones' referring to the tumour localization of cancer pain patients. Pain at baseline was compared to a 3-day treatment interval consisting of 5 min of matrix stimulation in the morning and evening followed by a 3-day follow-up period without therapy. Main outcome parameters included numeric rating scale values (rating scale 0…

Endovascular Denervation: A New Approach for Cancer Pain Relief?

PURPOSE: To evaluate the effects of endovascular denervation (EDN) on abdominal cancer pain relief. MATERIALS AND METHODS: From April 2017 to February 2018, 7 cancer patients (2 males and 5 females) were enrolled in this study. The diagnoses of the patients included 3 pancreatic cancer, 2 cervical carcinoma, 1 cholangiocarcinoma, and 1 esophageal cancer with retroperitoneum lymph nodes invasion. Denervation was carried out at the abdominal aorta close to the origin of celiac artery and superior mesenteric artery with the use of a multielectrode radiofrequency ablation catheter with settings o…

Acidic microenvironment and bone pain in cancer-colonized bone.

Solid cancers and hematologic cancers frequently colonize bone and induce skeletal-related complications. Bone pain is one of the most common complications associated with cancer colonization in bone and a major cause of increased morbidity and diminished quality of life, leading to poor survival in cancer patients. Although the mechanisms responsible for cancer-associated bone pain (CABP) are poorly understood, it is likely that complex interactions among cancer cells, bone cells and peripheral nerve cells contribute to the pathophysiology of CABP. Clinical observations that specific inhibito

Misuse of prescription opioids in chronic non-cancer pain.

Somatization disorder is a common cause of chronic non-cancer pain. The use of opioids in such conditions carries a risk of their potential abuse. Lax regulations coupled with sub-optimal medical training in India lead to the rampant use of prescription opioids. We present a case of somatization disorder along with injection pentazocine dependence in a woman, in whom use of pentazocine was initiated by a registered medical practitioner for somatoform pain management, followed by self-injection because of its easy availability in local pharmacy shops. We highlight the need for education of medi…

[Pain in chronic pancreatitis and pancreatic cancer - treatment options].

Treatment of pain is one of the main pillars of treatment of pancreatic diseases. Abdominal pain is a common and often debilitating symptom in patients with chronic pancreatitis and pancreatic cancer. Treatment involves abstinence from tobacco, alcohol and analgetics and adjunctive agents. Surgical and endoscopic treatment requires careful patient selection based on a detailed analysis of ductal anatomy. The limited possibilities of this therapy are patients without dilatation of the main pancreatic duct. Results of randomized trials suggest that the effect of surgical treatment is sustained o

Using animal models to understand cancer pain in humans.

Cancer pain is not a single entity but a complex pain state involving different pain syndromes, with inflammatory, neuropathic, compressive, and ischaemic mechanisms. Current therapeutic regimens are based largely on opioids, although opioid treatment can lead to many side effects. Studies using animal models of cancer pain are aimed at understanding cancer pain and developing novel therapies. The most frequently reported models are of bone cancer pain, predominantly modelling pain associated with tumour growth within bone marrow. Here we summarise recent findings from studies using animal mod…

Neural blockade for persistent pain after breast cancer surgery.

Persistent pain after breast cancer surgery is predominantly a neuropathic pain syndrome affecting 25% to 60% of patients and related to injury of the intercostobrachial nerve, intercostal nerves, and other nerves in the region. Neural blockade can be useful for the identification of nerves involved in neuropathic pain syndromes or to be used as a treatment in its own right. The purpose of this review was to examine the evidence for neural blockade as a potential diagnostic tool or treatment for persistent pain after breast cancer surgery. In this systematic review, we found only 7 studies (n

Spinal cord stimulation for cancer-related pain in adults.

BACKGROUND: Cancer-related pain places a heavy burden on public health with related high expenditure. Severe pain is associated with a decreased quality of life in patients with cancer. A significant proportion of patients with cancer-related pain are under-treated.There is a need for more effective control of cancer-related pain. Spinal cord stimulation (SCS) may have a role in pain management. The effectiveness and safety of SCS for patients with cancer-related pain is currently unknown. OBJECTIVES: This systematic review evaluated the effectiveness of SCS for cancer-related pain compared w

[Retrospective evaluation of pregabalin for cancer-related neuropathic pain].

BACKGROUND: Evidence to support the use of pregabalin in combination with opioid analgesics for the treatment of cancer-related neuropathic pain is limited. METHODS: We carried out a retrospective investigation on patients hospitalized in our department with cancer-related neuropathic pain and under pregabalin treatment. Patients were divided into two groups: A group (= < 300 mg pregabalin daily) and B group (> 300 mg pregabalin daily). The two groups were compared in terms of a suite of factors (e. g., age starting and maimtenance dose of pregabaline, adverse effect). RESULTS: Patient's age

[Treatment of severe non-cancer pain by oral morphine].

Although the pain-relieving effect of morphine and other opioid analgesics for various conditions (cancer or non-cancer) are established, many physicians hesitate to prescribe them for the patients suffering from severe non-cancer pain. To develop full efficacy of morphine (and other opioids), following procedures are essential for the therapy; detailed explanation about the drugs, careful measures to prevent the adverse effects (nausea, vomiting, constipation, sleepiness, etc.) and prescribing "analgesic dosage" of morphine for the patient. We have been engaged in the control of severe non-ca…

Antidepressants and antiepileptic drugs for chronic non-cancer pain.

The development of newer classes of antidepressants and second-generation antiepileptic drugs has created unprecedented opportunities for the treatment of chronic pain. These drugs modulate pain transmission by interacting with specific neurotransmitters and ion channels. The actions of antidepressants and antiepileptic drugs differ in neuropathic and non-neuropathic pain, and agents within each medication class have varying degrees of efficacy. Tricyclic antidepressants (e.g., amitriptyline, nortriptyline, desipramine) and certain novel antidepressants (i.e., bupropion, venlafaxine, duloxetin

Bilateral CT-guided percutaneous cordotomy for cancer pain relief.

AIM: CT-guided percutaneous cordotomy is a useful procedure for treating unilateral cancer pain, however, bilateral cordotomy can be required on some occasions. We evaluated the effectiveness and complications of bilateral cordotomy. MATERIALS AND METHODS: Two hundred and thirty-four patients who suffered from unilateral cancer pain underwent CT-guided percutaneous cordotomy. The procedure was repeated in 22 patients, and nine patients had bilateral cordotomy. Effectiveness and complications were recorded after each procedure. RESULTS: Of nine patents (three women and six men) having bilater…

Assessment of postoperative pain after laryngeal surgery for cancer.

OBJECTIVES: To assess the intensity of postoperative pain after laryngeal surgery for cancer and the efficacy of analgesic injections at fixed hours. DESIGN: A prospective clinical study performed during the 3 days following laryngeal cancer surgery. SETTING: A university medical center. PATIENTS: Fifteen men (age range, 38-74 years) having just undergone a partial or total laryngectomy for epidermoid carcinoma. INTERVENTIONS: The analgesic treatment consisted of intravenous administrations at fixed hours (propacetamol or nalbuphine hydrochloride), with the possibility of rescue doses on d

[153Sm-EDTMP for moderate and severe bone cancer pain].

One hundred and thirty-six patients with bone cancer pain were treated with 153Sm-EDTMP (ethylenediamine-tetramethylene phosphonic acid). Pain free was noted in 49 cases (36%, 49/136) and pain relief in 77 cases (56.6%, 77/136), the total relief rate being 92.6% (126/136). The data from 76 patients with moderate and severe pain showed there were no significant relationships between the patients' age, the dose of 153Sm-EDTMP and the analgesic effects (P > 0.05). The pain relief observed in the patients with chest pain (ribs metastases) was earlier than that in other groups (P < 0.05). We didn't…